CN107628017B - Vacuum pump control method and device for electric automobile, controller and automobile - Google Patents
Vacuum pump control method and device for electric automobile, controller and automobile Download PDFInfo
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- CN107628017B CN107628017B CN201710763019.5A CN201710763019A CN107628017B CN 107628017 B CN107628017 B CN 107628017B CN 201710763019 A CN201710763019 A CN 201710763019A CN 107628017 B CN107628017 B CN 107628017B
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Abstract
The invention provides a vacuum pump control method, a vacuum pump control device, a controller and an automobile of an electric automobile, wherein the method is applied to a VBP (vacuum booster) controller, the VBP is in communication connection with a control module of the electric automobile, and the method comprises the following steps: acquiring a preset signal of the control module; when the preset signal is detected to meet the preset fault condition, confirming that the vacuum pump has a fault working condition associated with the control module; determining a fault grade corresponding to a fault working condition according to a corresponding relation between a preset fault working condition and the fault grade; and executing preset fault processing operation corresponding to the fault grade.
Description
Technical field
The present invention relates to automobile technical field, in particular to vacuum method for controlling pump, the device, control of a kind of electric car
Device and automobile.
Background technique
With the rapid development of automotive engineering, the new-energy automobile based on electric car is gradually opened up markets, into
Enter people's lives.Therefore electric car loses true due to replacing the engine driving of orthodox car using motor driven
Empty source can not provide vacuum servo for automobile brake general pump.The vacuum pump of electric car just produces to make up this deficiency
It is raw.Vacuum pump provides power using Vehicular accumulator cell, and the motor on the pump housing is promoted to carry out piston motion to generate vacuum, for electricity
Electrical automobile provides vacuum source.
However, vacuum pump is in the process of running, if generating failure, vehicle braking performances are easily reduced, or even cause braking
The dangerous situations such as failure.
Summary of the invention
The present invention provides vacuum method for controlling pump, device, controller and the automobile of a kind of electric car, the purpose is to for
Solution vacuum pump in the process of running, if generating failure, the danger such as is easily reduced vehicle braking performances, or even causes brake fade
The problem of dangerous situation condition.
On the one hand, the embodiment provides a kind of vacuum method for controlling pump of electric car, the method applications
In vacuum servo controller VBP, the control module of the VBP and electric car is communicated to connect, which comprises
Obtain the preset signals of the control module；
When detecting that the preset signals meet preset fault condition, confirmation vacuum pump occurs and the control module phase
Associated fault condition；
According to the corresponding relationship between preset fault condition and fault level, the corresponding event of the fault condition is determined
Hinder grade；
Execute preset failure processing operation corresponding with the fault level.
Optionally, the fault level includes level fault and secondary failure；
The step of execution preset failure processing operation corresponding with the fault level, comprising:
When the fault level is the level fault, expression is used for the entire car controller VCU of automobile transmission
Level fault, and indicate that the VCU executes the Fisrt fault signal of Fisrt fault processing operation；
When the fault level is the secondary failure, Xiang Suoshu VCU is sent for indicating that secondary failure occurs, and is referred to
Show that the VCU executes the second fault-signal of the second fault handling operation.
Optionally, the step of instruction VCU executes Fisrt fault processing operation, comprising:
The VCU is indicated in the state that it is enabled for detecting current brake pedal signal, it is pre- that braking torque is promoted one
If numerical value, and
Indicate the VCU by current vehicle speed control below a preset vehicle speed.
Optionally, the step of execution preset failure processing operation corresponding with the fault level, comprising:
Pre-warning signal is sent to the instrument controller ICM of automobile, indicates the ICM according to the pre-warning signal to automobile
Signal is lighted in the output of braking system faults lamp；
The fault code of the fault condition is stored, and freezes the default critical data of the fault condition；
And third fault-signal is sent to the middle control unit EHU of automobile, indicating that the EHU is positioned by vehicle-mounted global is
System GPS search auto repair point.
Optionally, the control module includes vacuum pressure sensor and barometric pressure sensor；
Described when detecting that the preset signals meet preset fault condition, confirmation vacuum pump occurs and the control mould
The step of block associated fault condition, comprising:
Detect the output voltage of the vacuum pressure sensor not preset first output voltage range and it is lasting when
Between more than the first preset time, confirm that the fault condition of vacuum pressure sensor failure occurs for vacuum pump；And/or
Detect the output voltage of the barometric pressure sensor not preset second output voltage range and it is lasting when
Between more than the second preset time, confirm that the fault condition of barometric pressure sensor failure occurs for vacuum pump.
Optionally, described when detecting that the preset signals meet preset fault condition, confirmation vacuum pump occurs and institute
The step of stating control module associated fault condition, comprising:
The atmosphere that the vacuum pressure value and the barometric pressure sensor measured according to the vacuum pressure sensor measures
Pressure value determines the vacuum degree of the vacuum pump, detects the vacuum degree lower than preset vacuum level threshold and the duration surpasses
When crossing third preset time, the fault condition of rough vacuum failure occurs for confirmation；
Or
The output voltage of the vacuum pressure sensor is in first output voltage range and atmospheric pressure sensing
The atmospheric pressure value that device measures is lower than preset first atmospheric pressure threshold value and when the duration is more than third preset time, confirmation hair
The fault condition of raw rough vacuum failure.
Optionally, described when detecting that the preset signals meet preset fault condition, confirmation vacuum pump occurs and institute
The step of stating control module associated fault condition, comprising:
Detect the output voltage of the vacuum pressure sensor in first output voltage range, the atmospheric pressure
The output voltage of sensor is in the state that the driving signal of second output voltage range and vacuum pump is in and is not enabled on, institute
When stating increment of the vacuum degree in the 4th preset time period lower than preset first delta threshold, the vacuum pump system is confirmed
The fault condition of dynamic force aid system leakage failure；
Or
The output voltage of the vacuum pressure sensor is in first output voltage range, the barometric pressure sensor
The atmospheric pressure value measured is lower than the preset second largest air pressure threshold value and the driving signal of vacuum pump is in the state of being not enabled on,
Increment of the vacuum pressure value that the vacuum pressure sensor measures in the 4th preset time period is lower than preset second increment
When threshold value, confirm that the fault condition of force aid system for braking leakage failure occurs for the vacuum pump.
Optionally, the control module includes the driving motor of the vacuum pump；
Described when detecting that the preset signals meet preset fault condition, confirmation vacuum pump occurs and the control mould
The step of block associated fault condition, comprising:
Detect that the status signal of the driving motor of vacuum pump indicates that the driving motor operating duration is more than the 5th default
When the time, confirm that the fault condition that vacuum pump often turns failure occurs for the vacuum pump.
Optionally, it after the step of vacuum pump often turns the fault condition of failure occurs for the confirmation vacuum pump, also wraps
It includes:
If current vehicle speed is higher than preset first speed threshold value, the driving motor for controlling the vacuum pump is in enabled shape
State；
Or
If current vehicle speed is lower than preset second speed threshold value, the driving motor for controlling the vacuum pump, which is in, closes shape
State；The first speed threshold value is higher than the second speed threshold value.
Optionally, described when detecting that the preset signals meet preset fault condition, confirmation vacuum pump occurs and institute
The step of stating control module associated fault condition, comprising:
Detect that the vacuum pump does not work after the driving motor of vacuum pump transmission driving signal,
Vacuum pump work described in driving signal is not sent to the driving motor of vacuum pump,
Or
In the state that vacuum pump is in enabled, the driving current of the vacuum pump is more than a pre-set current value, and persistently when
Length confirms that electric fault occurs for the vacuum pump more than the 6th preset time.
Optionally, the control module includes vacuum pressure sensor, barometric pressure sensor, electric stabilizing system, electricity
At least one of machine controller and battery management system.
Optionally, the method also includes:
It detects when not receiving the preset signals of at least one control module in continuous 7th preset time, really
Recognize the vacuum pump and the fault condition that failure is lost in communication occurs.
Optionally, the corresponding relationship according between preset fault condition and fault level determines the failure work
The step of condition corresponding fault level, comprising:
When the fault condition is vacuum pressure sensor failure or rough vacuum failure, the fault condition is corresponding
Fault level be the level fault；Or
When the fault condition is barometric pressure sensor failure, force aid system for braking reveals failure, vacuum pump often turns event
Barrier, communication lose failure or when electric faults, and the corresponding fault level of the fault condition is the secondary failure.
Optionally, the method also includes:
When detecting that automobile ignition switch signal is in ON electricity rising edge, Xiang Suoshu vacuum pump exports wake-up signal.
Optionally, the method also includes:
When detecting that automobile ON electricity is in failing edge, control signal is exported to vacuum pump driving motor and to the vacuum
Pump output sleep signal；Wherein, the control signal is used to indicate the vacuum pump driving motor for the vacuum of the vacuum pump
Degree is adjusted to preset max vacuum angle value, and the sleep signal is used to indicate the vacuum pump and is delayed after the 8th preset time
Carry out suspend mode.
On the other hand, the embodiments of the present invention also provide a kind of vacuum pump control devices of electric car, are applied to true
The communication connection of the control module of empty assist controller VBP, the VBP and electric car, described device include:
Signal acquisition module, for obtaining the preset signals of the control module；
Fault detection module, when for detecting that the preset signals meet preset fault condition, confirmation vacuum pump hair
Raw fault condition associated with the control module；
Level determination module, described in determining according to the corresponding relationship between preset fault condition and fault level
The corresponding fault level of fault condition；
Fault processing module, for executing preset failure processing operation corresponding with the fault level.
Optionally, the fault level includes level fault and secondary failure；
The fault processing module includes:
First processing submodule, is used for when the fault level is the level fault, to the entire car controller of automobile
VCU is sent for indicating that level fault occurs, and indicates that the VCU executes the Fisrt fault signal of Fisrt fault processing operation；
Second processing submodule, for when the fault level is the secondary failure, Xiang Suoshu VCU to be sent for table
Show generation secondary failure, and indicates that the VCU executes the second fault-signal of the second fault handling operation.
Optionally, the first processing submodule is for including:
The VCU is indicated in the state that it is enabled for detecting current brake pedal signal, it is pre- that braking torque is promoted one
If numerical value, and
Indicate the VCU by current vehicle speed control below a preset vehicle speed.
Optionally, the fault processing module includes:
Third handle submodule, for the instrument controller ICM of automobile send pre-warning signal, indicate the ICM according to
The pre-warning signal lights signal to the output of the braking system faults lamp of automobile；
The fault code of the fault condition is stored, and freezes the default critical data of the fault condition；
And third fault-signal is sent to the middle control unit EHU of automobile, indicating that the EHU is positioned by vehicle-mounted global is
System GPS search auto repair point.
Optionally, the control module includes vacuum pressure sensor and barometric pressure sensor；
The fault detection module includes:
First detection sub-module, the output voltage for detecting the vacuum pressure sensor are defeated not preset first
Voltage range and duration are more than the first preset time out, and the failure work of vacuum pressure sensor failure occurs for confirmation vacuum pump
Condition；And/or
Second detection sub-module, the output voltage for detecting the barometric pressure sensor are defeated not preset second
Voltage range and duration are more than the second preset time out, and the failure work of barometric pressure sensor failure occurs for confirmation vacuum pump
Condition.
Optionally, the fault detection module includes:
Third detection sub-module, vacuum pressure value and the atmospheric pressure for being measured according to the vacuum pressure sensor
The atmospheric pressure value that force snesor measures determines the vacuum degree of the vacuum pump, detects the vacuum degree lower than preset vacuum
When spending threshold value and duration and being more than third preset time, the fault condition of rough vacuum failure occurs for confirmation；
Or
The output voltage of the vacuum pressure sensor is in first output voltage range and atmospheric pressure sensing
The atmospheric pressure value that device measures is lower than preset first atmospheric pressure threshold value and when the duration is more than third preset time, confirmation hair
The fault condition of raw rough vacuum failure.
Optionally, the fault detection module includes:
4th detection sub-module, for detecting the output voltage of the vacuum pressure sensor in the first output electricity
Range is pressed, the output voltage of the barometric pressure sensor is at the driving signal of second output voltage range and vacuum pump
In the state of being not enabled on, when increment of the vacuum degree in the 4th preset time period is lower than preset first delta threshold,
Confirm that the fault condition of force aid system for braking leakage failure occurs for the vacuum pump；
Or
The output voltage of the vacuum pressure sensor is in first output voltage range, the barometric pressure sensor
The atmospheric pressure value measured is lower than the preset second largest air pressure threshold value and the driving signal of vacuum pump is in the state of being not enabled on,
Increment of the vacuum pressure value that the vacuum pressure sensor measures in the 4th preset time period is lower than preset second increment
When threshold value, confirm that the fault condition of force aid system for braking leakage failure occurs for the vacuum pump.
Optionally, the control module includes the driving motor of the vacuum pump；
The fault detection module includes:
5th detection sub-module, for detecting that the status signal of driving motor of vacuum pump indicates the driving motor fortune
When turning duration more than five preset times, confirm that the fault condition that vacuum pump often turns failure occurs for the vacuum pump.
Optionally, described device further include:
Rate control module, for confirming that the vacuum pump occurs vacuum pump and often turns failure in the 5th detection sub-module
Fault condition after,
If current vehicle speed is higher than preset first speed threshold value, the driving motor for controlling the vacuum pump is in enabled shape
State；
Or
If current vehicle speed is lower than preset second speed threshold value, the driving motor for controlling the vacuum pump, which is in, closes shape
State；The first speed threshold value is higher than the second speed threshold value.
Optionally, the fault detection module includes:
6th detection sub-module, for detecting that the vacuum pump is not after the driving motor of vacuum pump transmission driving signal
Work,
Vacuum pump work described in driving signal is not sent to the driving motor of vacuum pump,
Or
In the state that vacuum pump is in enabled, the driving current of the vacuum pump is more than a pre-set current value, and persistently when
Length confirms that electric fault occurs for the vacuum pump more than the 6th preset time.
Optionally, the control module includes vacuum pressure sensor, barometric pressure sensor, electric stabilizing system, electricity
At least one of machine controller and battery management system.
Optionally, described device further include:
7th detection sub-module does not receive at least one described control in continuous 7th preset time for detecting
When the preset signals of module, confirm that the fault condition that failure is lost in communication occurs for the vacuum pump.
Optionally, the level determination module includes:
First determines submodule, for being vacuum pressure sensor failure or rough vacuum failure when the fault condition
When, the corresponding fault level of the fault condition is the level fault；Or
Second determines submodule, lets out for working as the fault condition for barometric pressure sensor failure, force aid system for braking
When dew failure, vacuum pump often turn failure, failure or electric fault are lost in communication, the corresponding fault level of the fault condition is
The secondary failure.
Optionally, described device further include:
Wake-up module, when for detecting that automobile ignition switch signal is in ON electricity rising edge, the output of Xiang Suoshu vacuum pump
Wake-up signal.
Optionally, described device further include:
Sleep block when for detecting that automobile ON electricity is in failing edge, exports control signal to vacuum pump driving motor
And sleep signal is exported to the vacuum pump；Wherein, the control signal is used to indicate the vacuum pump driving motor for institute
The vacuum degree for stating vacuum pump is adjusted to preset max vacuum angle value, and the sleep signal is used to indicate the vacuum pump delay the
Suspend mode is carried out after eight preset times.
Another aspect the embodiments of the present invention also provide a kind of controller, including memory, processor and is stored in institute
The computer program that can be run on memory and on the processor is stated, the processor reads the journey in the memory
Sequence executes the step in the vacuum method for controlling pump of above-mentioned electric car.
In another aspect, also a kind of automobile of the embodiment of the present invention, including above controller.
Above scheme of the invention is include at least the following beneficial effects:
Vacuum method for controlling pump, device, controller and the automobile of electric car provided by the invention pass through acquisition and VBP
The preset signals of the control module of communication connection detect fault condition according to preset signals, and when breaking down operating condition, according to
Fault level executes fault handling operation；The present invention improves the reliability of vacuum boost system, improves the safety of vehicle,
It realizes since vacuum pump failure causes braking system in failure, provides enough safety guarantee for driver；And this hair
It is bright to joined VBP delayed sleep mechanism, prevent the unexpected failure to appearance；The present invention solves vacuum pump in operational process
In, if generating failure, the problem of being easily reduced vehicle braking performances, or even cause the dangerous situations such as brake fade.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by institute in the description to the embodiment of the present invention
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 shows the basic step flow charts of the vacuum method for controlling pump of the electric car of the embodiment of the present invention offer；
Fig. 2 indicates the network architecture diagram of specific example of the invention；
Fig. 3 indicates the block diagram of the vacuum pump control device for the electric car that the embodiment of the present invention provides.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
Referring to Fig. 1, the embodiment provides a kind of vacuum method for controlling pump of electric car, help applied to vacuum
The communication connection of the control module of force controller VBP, the VBP and electric car, which comprises
Step 101, the preset signals of the control module are obtained.
Wherein, control module is to communicate to connect with vacuum servo controller (Vaccum Braking Program, VBP)
Control module, control module include vacuum pressure sensor, barometric pressure sensor, electric stabilizing system (Electronic
Stability Program, ESP), electric machine controller (Motor Control Unit, MCU) and battery management system
At least one of (Battery Management System, BMS).Preset signals are signal associated with control module,
The fault detection signal of failure whether is generated for detecting VBP.
As a specific example, referring to fig. 2, in the network architecture shown in Fig. 2, VBP and vacuum pressure sensor, atmospheric pressure
Sensor communication connection, passes through control with ESP, remote information processor (Telematics BOX, T-BOX), MCU and BMS
The connection of device local area network (Controller Area Network, CAN) bus communication；Wherein CAN_H indicates CAN bus high level
Signal, CAN_L indicate CAN bus low level signal.It is handed between VBP and ESP, MCU, BMS and T-BOX by the signal of CAN bus
Mutually；VBP acquires the voltage value of vacuum pressure sensor and the voltage value of barometric pressure sensor by rigid line, and passes through internal meter
Model is calculated, the vacuum degree in current vacuum booster is obtained.
Step 102, when detecting that the preset signals meet preset fault condition, confirmation vacuum pump occurs and the control
The associated fault condition of molding block.
Wherein, meet preset fault condition with the fault detection signal of control module of VBP communication connection when detecting
When, confirmation is broken down；Each control module is preset with fault condition, and when preset signals meet fault condition, confirmation occurs
With the control module relevant fault operating condition.
Step 103, according to the corresponding relationship between preset fault condition and fault level, the fault condition phase is determined
Corresponding fault level.
Wherein, corresponding relationship is preset between fault condition and fault level, after determining fault condition, according to failure work
Condition determines fault level.
Optionally, the fault level includes level fault and secondary failure；The priority of level fault is higher than second level event
The priority of barrier.And when there are various faults operating condition, the higher fault condition of priority processing priority.
The step 103 includes:
When the fault condition is vacuum pressure sensor failure or rough vacuum failure, the fault condition is corresponding
Fault level be the level fault；Or
When the fault condition is barometric pressure sensor failure, force aid system for braking reveals failure, vacuum pump often turns event
Barrier, communication lose failure or when electric faults, and the corresponding fault level of the fault condition is the secondary failure.
Specifically, the corresponding relationship between fault condition and fault level can refer to following table 1:
Table 1:
Optionally, the failure of highest priority is vacuum pressure sensor failure (higher than rough vacuum failure at the same level),
Because vacuum pressure sensor breaks down, it will lead to whole system control logic and fail, driving motor execution disorder, therefore and
When judge that this failure will reduce vehicle risk；When vacuum pressure sensor, which breaks down, to be occurred simultaneously with other failures,
Troubleshooting is carried out by vacuum pressure sensor processing mode.
Failure handling mechanisms are to realize by way of building troubleshooting operating condition and do not changing original torque model
On the basis of, for fault condition classification processing, and convenient for carrying out parameter optimization for the calibration result of different vehicles.
Step 104, preset failure processing operation corresponding with the fault level is executed.
Specifically, after fault level determines, fault handling operation corresponding with fault level is executed.
The step 104 includes:
When the fault level is the level fault, expression is used for the entire car controller VCU of automobile transmission
Level fault, and indicate that the VCU executes the Fisrt fault signal of Fisrt fault processing operation；
When the fault level is the secondary failure, Xiang Suoshu VCU is sent for indicating that secondary failure occurs, and is referred to
Show that the VCU executes the second fault-signal of the second fault handling operation.
Wherein, after level fault occurs for confirmation, VBP passes through entire car controller (Vehicle of the CAN bus to automobile
Control Unit, VCU) Fisrt fault signal is sent, instruction VCU executes Fisrt fault processing operation；When generation level fault
Afterwards, the second fault-signal is sent to VCU, instruction VCU executes the second fault handling operation.
Optionally, the step 104 includes:
Pre-warning signal is sent to the instrument controller ICM of automobile, indicates the ICM according to the pre-warning signal to automobile
Signal is lighted in the output of braking system faults lamp；
The fault code of the fault condition is stored, and freezes the default critical data of the fault condition；
And third fault-signal is sent to the middle control unit EHU of automobile, indicating that the EHU is positioned by vehicle-mounted global is
System GPS search auto repair point.
Specifically, when break down operating condition when, either level fault or secondary failure are performed both by following troubleshooting
Operation:
Pre-warning signal is sent to the instrument controller (Instrument Control Management, ICM) of automobile, is referred to
Show that ICM lights signal to the output of the braking system faults lamp of automobile, lights braking system faults lamp, remind operator brake system
It breaks down, driver is asked to take timely measure；
The fault code of the fault condition is stored, and freezes the default critical data of the fault condition, is repaired with facilitating
Reason personnel can be accurately read error code and freezing data, handle failure；
Third fault-signal is sent to the middle control unit (Entertainment Head Unit, EHU) of automobile, indicates institute
It states EHU and auto repair point is searched for by vehicle-bone global positioning system (Global Positioning System, GPS)；It is optional
Ground, this search will be carried out according to two dimensions: (1) the brand maintenance station nearest according to vehicle brand search, this scheme are preferential；
(2) generally the least expensive maintenance station being repaired recently by price search, and being shown on middle control screen, motor screen is passed through by driver
Mode repairs the selection at station, and EHU controls navigation software, switches to navigation mode.
Optionally, the step of instruction VCU executes Fisrt fault processing operation, comprising:
The VCU is indicated in the state that it is enabled for detecting current brake pedal signal, it is pre- that braking torque is promoted one
If numerical value, and
Indicate the VCU by current vehicle speed control below a preset vehicle speed.
Wherein, when level fault occurs, if detecting, current brake pedal signal is enabled state, i.e. brake pedal
When switching signal sets 1, indicate that driver has stepped on brake pedal, braking torque is promoted a default value by VCU control at this time, i.e., will
Braking energy is promoted, and increases a default percentage on the original basis, electric braking ability is improved, to realize braking compensation effect；
And in order to preferably improve drive safety, VCU controls current vehicle speed control below a preset vehicle speed at this time.
Optionally, the control module includes vacuum pressure sensor and barometric pressure sensor；
The step 102 includes:
Detect the output voltage of the vacuum pressure sensor not preset first output voltage range and it is lasting when
Between more than the first preset time, confirm that the fault condition of vacuum pressure sensor failure occurs for vacuum pump；And/or
Detect the output voltage of the barometric pressure sensor not preset second output voltage range and it is lasting when
Between more than the second preset time, confirm that the fault condition of barometric pressure sensor failure occurs for vacuum pump.
Wherein, there are corresponding relationship, different voltages value is corresponding different for the output voltage of vacuum pressure sensor and vacuum degree
Vacuum degree, if output voltage not in preset first output voltage range, shows vacuum degree exception；And the duration is more than the
One preset time, VBP confirm that vacuum pressure sensor data are insincere, and obtained vacuum pressure value is invalid, confirmation vacuum
The fault condition of vacuum pressure sensor failure occurs for pump.
Similarly, there are corresponding relationship, different voltages value is corresponding different for the output voltage of barometric pressure sensor and vacuum degree
Vacuum degree, if output voltage not in preset second output voltage range, shows vacuum degree exception；And the duration is more than the
Two preset times, VBP confirm that barometric pressure sensor data are insincere, and obtained atmospheric pressure value is invalid, confirmation vacuum
The fault condition of barometric pressure sensor data fault occurs for pump.
Optionally, the step 102 includes:
The atmosphere that the vacuum pressure value and the barometric pressure sensor measured according to the vacuum pressure sensor measures
Pressure value determines the vacuum degree of the vacuum pump, detects the vacuum degree lower than preset vacuum level threshold and the duration surpasses
When crossing third preset time, the fault condition of rough vacuum failure occurs for confirmation；
Or
The output voltage of the vacuum pressure sensor is in first output voltage range and atmospheric pressure sensing
The atmospheric pressure value that device measures is lower than preset first atmospheric pressure threshold value and when the duration is more than third preset time, confirmation hair
The fault condition of raw rough vacuum failure.
Wherein, when the vacuum degree for determining vacuum pump according to vacuum pressure value and atmospheric pressure value, the vacuum degree is detected
Lower than preset vacuum level threshold and when the duration is more than third preset time, there is rough vacuum in VBP confirmation braking system
Failure；Or vacuum pressure sensor fault-free and barometric pressure sensor are in the event of failure, detect atmospheric pressure value lower than default
The first atmospheric pressure threshold value and the duration be more than third preset time: i.e. the output voltage of vacuum pressure sensor is described the
The atmospheric pressure value that one output voltage range and the barometric pressure sensor measure lower than preset first atmospheric pressure threshold value and
When duration is more than third preset time, there is rough vacuum failure in VBP confirmation braking system, under rough vacuum failure, very
Empty power-assisted is limited, and brake pedal tramples difficulty, and master cylinder can not build pressure in time.
Optionally, the step 102 includes:
Detect the output voltage of the vacuum pressure sensor in first output voltage range, the atmospheric pressure
The output voltage of sensor is in the state that the driving signal of second output voltage range and vacuum pump is in and is not enabled on, institute
When stating increment of the vacuum degree in the 4th preset time period lower than preset first delta threshold, the vacuum pump system is confirmed
The fault condition of dynamic force aid system leakage failure；
Or
The output voltage of the vacuum pressure sensor is in first output voltage range, the barometric pressure sensor
The atmospheric pressure value measured is lower than the preset second largest air pressure threshold value and the driving signal of vacuum pump is in the state of being not enabled on,
Increment of the vacuum pressure value that the vacuum pressure sensor measures in the 4th preset time period is lower than preset second increment
When threshold value, confirm that the fault condition of force aid system for braking leakage failure occurs for the vacuum pump.
Wherein, when (the i.e. described vacuum pressure in the normal situation of vacuum pressure sensor and barometric pressure sensor
The output voltage of sensor is in first output voltage range, and the output voltage of the barometric pressure sensor is described second
Output voltage range), and the driving signal of vacuum pump is in the state of being not enabled on, does not step on brake pedal (current brake pedal
In the state that signal is not enabled on), if increment of the vacuum degree in the 4th preset time period is lower than preset first increment threshold
When value, the fault condition of force aid system for braking leakage failure occurs for confirmation vacuum pump.
Or vacuum pressure sensor fault-free and barometric pressure sensor in the event of failure (vacuum pressure sensor it is defeated
Voltage is lower than preset second in first output voltage range, the atmospheric pressure value that the barometric pressure sensor measures out
Atmospheric pressure threshold value), brake pedal (in the state that current brake pedal signal is not enabled on) is not stepped on, if atmospheric pressure value is pre- the 4th
If the increment in the period is lower than preset second delta threshold, the failure work of force aid system for braking leakage failure occurs for confirmation
Condition.
Optionally, the control module includes the driving motor of the vacuum pump；
The step 102 includes:
Detect that the status signal of the driving motor of vacuum pump indicates that the driving motor operating duration is more than the 5th default
When the time, confirm that the fault condition that vacuum pump often turns failure occurs for the vacuum pump.
Wherein, VBP detects the status signal of the driving motor of vacuum pump, indicates that driving motor operating duration is more than the
When five preset times, vaccum pump motor long time running will lead to motor overheating damage, in order to be protected to vaccum pump motor,
Confirm that the fault condition that vacuum pump often turns failure occurs for the vacuum pump.
Optionally, it after the step of vacuum pump often turns the fault condition of failure occurs for the confirmation vacuum pump, also wraps
It includes:
If current vehicle speed is higher than preset first speed threshold value, the driving motor for controlling the vacuum pump is in enabled shape
State；
Or
If current vehicle speed is lower than preset second speed threshold value, the driving motor for controlling the vacuum pump, which is in, closes shape
State；The first speed threshold value is higher than the second speed threshold value.
Wherein, since vaccum pump motor long time running will lead to motor overheating damage, in order to be carried out to vaccum pump motor
Protection, and consider that the lower vacuum degree of high speed is low, it is long to will lead to braking distance, therefore when speed is higher than the first speed threshold value, protect
It holds vacuum pump driving and is continuously in enabled state；When speed is lower than the second speed threshold value, speed is lower at this time, helps in no vacuum
In the case of power, directly have been able to that vehicle is avoided poor stop problem occur by the power that driver steps on brake pedal, because
Motor often turns over cause thermal damage in order to prevent for this, and VBP controls motor and closes driving.Motor frequently opens and closes in order to prevent,
Provided with the second speed threshold value to the first speed threshold value hysteresis section, i.e., vacuum pump enabled state remains unchanged in the section.
Optionally, the step 102 includes:
Detect that the vacuum pump does not work after the driving motor of vacuum pump transmission driving signal,
Vacuum pump work described in driving signal is not sent to the driving motor of vacuum pump,
Or
In the state that vacuum pump is in enabled, the driving current of the vacuum pump is more than a pre-set current value, and persistently when
Length confirms that electric fault occurs for the vacuum pump more than the 6th preset time.
Wherein, when VBP sends vacuum pump drive signal and vacuum pump does not work, it is logical that vacuum pump driving occurs in VBP confirmation
Road open-circuit fault；At work, there is electric fault to vacuum pump in VBP confirmation, vacuum when VBP not sent vacuum pump drive signal
Pump driving access is to power supply short circuit failure；When vacuum pump enables, the driving current of vacuum pump is more than a pre-set current value, and is held
When continuous duration is more than six preset times, there is electric fault in VBP confirmation, and vacuum pump drives access shorted to earth failure.
Optionally, the method also includes:
It detects when not receiving the preset signals of at least one control module in continuous 7th preset time, really
Recognize the vacuum pump and the fault condition that failure is lost in communication occurs.
Wherein, when VBP is in the 7th preset time, the crucial message for failing to receive any one controller module is (for this
The preset signals of controller), VBP confirm braking system occur communication lose failure, VBP control vacuum pump work normally, VBP to
ICM sends early warning message, and ICM lights braking system faults lamp, and VCU is not processed.
Optionally, the method also includes:
When detecting that automobile ignition switch signal is in ON electricity rising edge, Xiang Suoshu vacuum pump exports wake-up signal.
Wherein, vacuum pump detects that wake-up is true when automobile ignition switch signal is in ON electricity rising edge using often electricity power supply
Sky pump, or ON eletric button is pressed when driver gets on the bus, vacuum pump is waken up, and assists operator brake by vacuum booster；
Traditional electric car is to wake up vacuum pump by vehicle high-voltage signal (represent vehicle and gone up high pressure), when due to high pressure system
System failure, when occurring electric under unexpected high pressure, vacuum pump stops working, and pedal is harder at this time, and braking distance is longer, will generate danger
Dangerous hidden danger, and On electricity (kl15 electricity) is used to wake up vacuum pump, this problem of very good solution.
Optionally, the method also includes:
When detecting that automobile ON electricity is in failing edge, control signal is exported to vacuum pump driving motor and to the vacuum
Pump output sleep signal；Wherein, the control signal is used to indicate the vacuum pump driving motor for the vacuum of the vacuum pump
Degree is adjusted to preset max vacuum angle value, and the sleep signal is used to indicate the vacuum pump and is delayed after the 8th preset time
Carry out suspend mode.
Wherein, when VBP detects ON electricity failing edge, control signal is exported to vacuum pump driving motor and to described true
Sky pump output sleep signal, control signal are used to indicate the vacuum pump driving motor and are adjusted to the vacuum degree of the vacuum pump
Preset max vacuum angle value, VBP driving motor carries out suction operation, and vacuum degree is evacuated to maximum value；Sleep signal
For triggering VBP delayed sleep mechanism, be delayed the 8th preset time suspend mode, does redundancy processing to the unexpected failure of appearance, mentions
The high reliability of vacuum boost system, improves the safety of vehicle.
In the above embodiment of the present invention, by obtaining the preset signals with the control module of VBP communication connection, according to pre-
If signal detection fault condition, and when breaking down operating condition, fault handling operation is executed according to fault level；The present invention improves
The reliability of vacuum boost system, improves the safety of vehicle, realizes since vacuum pump failure leads to braking system
In failure, enough safety guarantee are provided for driver；And present invention adds VBP delayed sleep mechanism, prevent to appearance
Unexpected failure；The present invention solves vacuum pump in the process of running, if generating failure, is easily reduced vehicle braking performances,
The problem of even causing the dangerous situations such as brake fade.
Referring to Fig. 3, the embodiments of the present invention also provide a kind of vacuum pump control devices of electric car, are applied to vacuum
The communication connection of the control module of assist controller VBP, the VBP and electric car, described device include:
Signal acquisition module 301, for obtaining the preset signals of the control module；
Fault detection module 302 when for detecting that the preset signals meet preset fault condition, confirms vacuum pump
Fault condition associated with the control module occurs；
Level determination module 303, for determining institute according to the corresponding relationship between preset fault condition and fault level
State the corresponding fault level of fault condition；
Fault processing module 304, for executing preset failure processing operation corresponding with the fault level.
Optionally, the fault level includes level fault and secondary failure；
The fault processing module 304 includes:
First processing submodule, is used for when the fault level is the level fault, to the entire car controller of automobile
VCU is sent for indicating that level fault occurs, and indicates that the VCU executes the Fisrt fault signal of Fisrt fault processing operation；
Second processing submodule, for when the fault level is the secondary failure, Xiang Suoshu VCU to be sent for table
Show generation secondary failure, and indicates that the VCU executes the second fault-signal of the second fault handling operation.
Optionally, the first processing submodule is for including:
The VCU is indicated in the state that it is enabled for detecting current brake pedal signal, it is pre- that braking torque is promoted one
If numerical value, and
Indicate the VCU by current vehicle speed control below a preset vehicle speed.
Optionally, the fault processing module 304 includes:
Third handle submodule, for the instrument controller ICM of automobile send pre-warning signal, indicate the ICM according to
The pre-warning signal lights signal to the output of the braking system faults lamp of automobile；
The fault code of the fault condition is stored, and freezes the default critical data of the fault condition；
And third fault-signal is sent to the middle control unit EHU of automobile, indicating that the EHU is positioned by vehicle-mounted global is
System GPS search auto repair point.
Optionally, the control module includes vacuum pressure sensor and barometric pressure sensor；
The fault detection module 302 includes:
First detection sub-module, the output voltage for detecting the vacuum pressure sensor are defeated not preset first
Voltage range and duration are more than the first preset time out, and the failure work of vacuum pressure sensor failure occurs for confirmation vacuum pump
Condition；And/or
Second detection sub-module, the output voltage for detecting the barometric pressure sensor are defeated not preset second
Voltage range and duration are more than the second preset time out, and the failure work of barometric pressure sensor failure occurs for confirmation vacuum pump
Condition.
Optionally, the fault detection module 302 includes:
Third detection sub-module, vacuum pressure value and the atmospheric pressure for being measured according to the vacuum pressure sensor
The atmospheric pressure value that force snesor measures determines the vacuum degree of the vacuum pump, detects the vacuum degree lower than preset vacuum
When spending threshold value and duration and being more than third preset time, the fault condition of rough vacuum failure occurs for confirmation；
Or
The output voltage of the vacuum pressure sensor is in first output voltage range and atmospheric pressure sensing
The atmospheric pressure value that device measures is lower than preset first atmospheric pressure threshold value and when the duration is more than third preset time, confirmation hair
The fault condition of raw rough vacuum failure.
Optionally, the fault detection module 302 includes:
4th detection sub-module, for detecting the output voltage of the vacuum pressure sensor in the first output electricity
Range is pressed, the output voltage of the barometric pressure sensor is at the driving signal of second output voltage range and vacuum pump
In the state of being not enabled on, when increment of the vacuum degree in the 4th preset time period is lower than preset first delta threshold,
Confirm that the fault condition of force aid system for braking leakage failure occurs for the vacuum pump；
Or
The output voltage of the vacuum pressure sensor is in first output voltage range, the barometric pressure sensor
The atmospheric pressure value measured is lower than the preset second largest air pressure threshold value and the driving signal of vacuum pump is in the state of being not enabled on,
Increment of the vacuum pressure value that the vacuum pressure sensor measures in the 4th preset time period is lower than preset second increment
When threshold value, confirm that the fault condition of force aid system for braking leakage failure occurs for the vacuum pump.
Optionally, the control module includes the driving motor of the vacuum pump；
The fault detection module 302 includes:
5th detection sub-module, for detecting that the status signal of driving motor of vacuum pump indicates the driving motor fortune
When turning duration more than five preset times, confirm that the fault condition that vacuum pump often turns failure occurs for the vacuum pump.
Optionally, described device further include:
Rate control module, for confirming that the vacuum pump occurs vacuum pump and often turns failure in the 5th detection sub-module
Fault condition after,
If current vehicle speed is higher than preset first speed threshold value, the driving motor for controlling the vacuum pump is in enabled shape
State；
Or
If current vehicle speed is lower than preset second speed threshold value, the driving motor for controlling the vacuum pump, which is in, closes shape
State；The first speed threshold value is higher than the second speed threshold value.
Optionally, the fault detection module 302 includes:
6th detection sub-module, for detecting that the vacuum pump is not after the driving motor of vacuum pump transmission driving signal
Work,
Vacuum pump work described in driving signal is not sent to the driving motor of vacuum pump,
Or
In the state that vacuum pump is in enabled, the driving current of the vacuum pump is more than a pre-set current value, and persistently when
Length confirms that electric fault occurs for the vacuum pump more than the 6th preset time.
Optionally, the control module includes vacuum pressure sensor, barometric pressure sensor, electric stabilizing system, electricity
At least one of machine controller and battery management system.
Optionally, described device further include:
7th detection sub-module does not receive at least one described control in continuous 7th preset time for detecting
When the preset signals of module, confirm that the fault condition that failure is lost in communication occurs for the vacuum pump.
Optionally, the level determination module 303 includes:
First determines submodule, for being vacuum pressure sensor failure or rough vacuum failure when the fault condition
When, the corresponding fault level of the fault condition is the level fault；Or
Second determines submodule, lets out for working as the fault condition for barometric pressure sensor failure, force aid system for braking
When dew failure, vacuum pump often turn failure, failure or electric fault are lost in communication, the corresponding fault level of the fault condition is
The secondary failure.
Optionally, described device further include:
Wake-up module, when for detecting that automobile ignition switch signal is in ON electricity rising edge, the output of Xiang Suoshu vacuum pump
Wake-up signal.
Optionally, described device further include:
Sleep block when for detecting that automobile ON electricity is in failing edge, exports control signal to vacuum pump driving motor
And sleep signal is exported to the vacuum pump；Wherein, the control signal is used to indicate the vacuum pump driving motor for institute
The vacuum degree for stating vacuum pump is adjusted to preset max vacuum angle value, and the sleep signal is used to indicate the vacuum pump delay the
Suspend mode is carried out after eight preset times.
Another aspect the embodiments of the present invention also provide a kind of controller, including memory, processor and is stored in institute
The computer program that can be run on memory and on the processor is stated, the processor reads the journey in the memory
Sequence executes the step in the vacuum method for controlling pump of above-mentioned electric car.
In another aspect, also a kind of automobile of the embodiment of the present invention, including above controller.
In the above embodiment of the present invention, by obtaining the preset signals with the control module of VBP communication connection, according to pre-
If signal detection fault condition, and when breaking down operating condition, fault handling operation is executed according to fault level；The present invention improves
The reliability of vacuum boost system, improves the safety of vehicle, realizes since vacuum pump failure leads to braking system
In failure, enough safety guarantee are provided for driver；And present invention adds VBP delayed sleep mechanism, prevent to appearance
Unexpected failure；The present invention solves vacuum pump in the process of running, if generating failure, is easily reduced vehicle braking performances,
The problem of even causing the dangerous situations such as brake fade.
It should be noted that the vacuum pump control device of electric car provided in an embodiment of the present invention is using the above method
Device, i.e. all embodiments of the above method are suitable for the device, and can reach the same or similar beneficial effect.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (30)
1. a kind of vacuum method for controlling pump of electric car is applied to vacuum servo controller VBP, which is characterized in that the VBP
It is communicated to connect with the control module of electric car, which comprises
Obtain the preset signals of the control module；
When detecting that the preset signals meet preset fault condition, confirmation vacuum pump occurs associated with the control module
Fault condition；
According to the corresponding relationship between preset fault condition and fault level, corresponding failure of the fault condition etc. is determined
Grade；
Execute preset failure processing operation corresponding with the fault level；
The method also includes:
When detecting that automobile ON electricity is in failing edge, to vacuum pump driving motor export control signal and to the vacuum pump it is defeated
Sleep signal out；Wherein, the control signal is used to indicate the vacuum pump driving motor for the vacuum degree tune of the vacuum pump
Whole is preset max vacuum angle value, and the sleep signal carries out after being used to indicate the 8th preset time of the vacuum pump delay
Suspend mode.
2. the method according to claim 1, wherein the fault level includes level fault and secondary failure；
The step of execution preset failure processing operation corresponding with the fault level, comprising:
When the fault level is the level fault, send to the entire car controller VCU of automobile for indicating that level-one occurs
Failure, and indicate that the VCU executes the Fisrt fault signal of Fisrt fault processing operation；
When the fault level is the secondary failure, Xiang Suoshu VCU is sent for indicating that secondary failure occurs, and indicates institute
State the second fault-signal that VCU executes the second fault handling operation.
3. according to the method described in claim 2, it is characterized in that, the instruction VCU executes Fisrt fault processing operation
The step of, comprising:
The VCU is indicated in the state that it is enabled for detecting current brake pedal signal, braking torque is promoted into a present count
Value, and
Indicate the VCU by current vehicle speed control below a preset vehicle speed.
4. the method according to claim 1, wherein described execute default event corresponding with the fault level
The step of hindering processing operation, comprising:
Pre-warning signal is sent to the instrument controller ICM of automobile, indicates braking of the ICM according to the pre-warning signal to automobile
Signal is lighted in the output of system failure lamp；
The fault code of the fault condition is stored, and freezes the default critical data of the fault condition；
And third fault-signal is sent to the middle control unit EHU of automobile, indicate that the EHU passes through vehicle-bone global positioning system
GPS search auto repair point.
5. the method according to claim 1, wherein the control module includes vacuum pressure sensor and atmosphere
Pressure sensor；
Described when detecting that the preset signals meet preset fault condition, confirmation vacuum pump occurs and the control module phase
The step of associated fault condition, comprising:
Detect the output voltage of the vacuum pressure sensor not preset first output voltage range and the duration it is super
The first preset time is crossed, the fault condition of vacuum pressure sensor failure occurs for confirmation vacuum pump；And/or
Detect the output voltage of the barometric pressure sensor not preset second output voltage range and the duration it is super
The second preset time is crossed, the fault condition of barometric pressure sensor failure occurs for confirmation vacuum pump.
6. according to the method described in claim 5, it is characterized in that, described detect that the preset signals meet preset failure
When condition, the step of fault condition associated with the control module occurs for vacuum pump is confirmed, comprising:
The atmospheric pressure that the vacuum pressure value and the barometric pressure sensor measured according to the vacuum pressure sensor measures
Value determines the vacuum degree of the vacuum pump, detects the vacuum degree lower than preset vacuum level threshold and the duration is more than the
When three preset times, the fault condition of rough vacuum failure occurs for confirmation；
Or
The output voltage of the vacuum pressure sensor is in first output voltage range and barometric pressure sensor survey
Lower than preset first atmospheric pressure threshold value and when the duration is more than third preset time, confirmation occurs low the atmospheric pressure value obtained
The fault condition of vacuum degree failure.
7. according to the method described in claim 6, it is characterized in that, described detect that the preset signals meet preset failure
When condition, the step of fault condition associated with the control module occurs for vacuum pump is confirmed, comprising:
Detect the output voltage of the vacuum pressure sensor in first output voltage range, the atmospheric pressure sensing
The output voltage of device is described true in the state that the driving signal of second output voltage range and vacuum pump is in and is not enabled on
When increment of the reciprocal of duty cycle in the 4th preset time period is lower than preset first delta threshold, confirm that the vacuum pump occurs braking and helps
The fault condition of Force system leakage failure；
Or
The output voltage of the vacuum pressure sensor is measured in first output voltage range, the barometric pressure sensor
Atmospheric pressure value is lower than the preset second largest air pressure threshold value and the driving signal of vacuum pump is in the state of being not enabled on, it is described
Increment of the vacuum pressure value that vacuum pressure sensor measures in the 4th preset time period is lower than preset second delta threshold
When, confirm that the fault condition of force aid system for braking leakage failure occurs for the vacuum pump.
8. the method according to claim 1, wherein the control module includes the driving electricity of the vacuum pump
Machine；
Described when detecting that the preset signals meet preset fault condition, confirmation vacuum pump occurs and the control module phase
The step of associated fault condition, comprising:
Detect that the status signal of the driving motor of vacuum pump indicates that the driving motor operating duration is more than the 5th preset time
When, confirm that the fault condition that vacuum pump often turns failure occurs for the vacuum pump.
9. according to the method described in claim 8, it is characterized in that, the confirmation vacuum pump occurs vacuum pump and often turns failure
Fault condition the step of after, further includes:
If current vehicle speed is higher than preset first speed threshold value, the driving motor for controlling the vacuum pump is in enabled state；
Or
If current vehicle speed is lower than preset second speed threshold value, the driving motor for controlling the vacuum pump is in close state；
The first speed threshold value is higher than the second speed threshold value.
10. the method according to claim 1, wherein described detect that the preset signals meet preset event
When barrier condition, the step of fault condition associated with the control module occurs for vacuum pump is confirmed, comprising:
Detect that the vacuum pump does not work after the driving motor of vacuum pump transmission driving signal,
Vacuum pump work described in driving signal is not sent to the driving motor of vacuum pump,
Or
In the state that vacuum pump is in enabled, the driving current of the vacuum pump is more than a pre-set current value, and duration is super
The 6th preset time is crossed, confirms that electric fault occurs for the vacuum pump.
11. according to the method described in claim 2, it is characterized in that, the control module includes vacuum pressure sensor, atmosphere
At least one of pressure sensor, electric stabilizing system, electric machine controller and battery management system.
12. according to the method for claim 11, which is characterized in that the method also includes:
It detects when not receiving the preset signals of at least one control module in continuous 7th preset time, confirms institute
It states vacuum pump and the fault condition that failure is lost in communication occurs.
13. according to the method described in claim 2, it is characterized in that, it is described according to preset fault condition and fault level it
Between corresponding relationship, the step of determining the fault condition corresponding fault level, comprising:
When the fault condition is vacuum pressure sensor failure or rough vacuum failure, the fault condition is corresponding former
Barrier grade is the level fault；Or
When the fault condition is barometric pressure sensor failure, force aid system for braking reveals failure, vacuum pump often turns failure, logical
News lose failure or when electric faults, and the corresponding fault level of the fault condition is the secondary failure.
14. the method according to claim 1, wherein the method also includes:
When detecting that automobile ignition switch signal is in ON electricity rising edge, Xiang Suoshu vacuum pump exports wake-up signal.
15. a kind of vacuum pump control device of electric car is applied to vacuum servo controller VBP, which is characterized in that described
The communication connection of the control module of VBP and electric car, described device include:
Signal acquisition module, for obtaining the preset signals of the control module；
Fault detection module, when for detecting that the preset signals meet preset fault condition, confirmation vacuum pump occur with
The associated fault condition of control module；
Level determination module, for determining the failure according to the corresponding relationship between preset fault condition and fault level
The corresponding fault level of operating condition；
Fault processing module, for executing preset failure processing operation corresponding with the fault level；
Described device further include:
Sleep block, when for detecting that automobile ON electricity is in failing edge, to vacuum pump driving motor export control signal and
Sleep signal is exported to the vacuum pump；Wherein, the control signal be used to indicate the vacuum pump driving motor will be described true
The vacuum degree of sky pump is adjusted to preset max vacuum angle value, and it is pre- that the sleep signal is used to indicate the vacuum pump delay the 8th
If carrying out suspend mode after the time.
16. device according to claim 15, which is characterized in that the fault level includes level fault and second level event
Barrier；
The fault processing module includes:
First processing submodule, for being sent out to the entire car controller VCU of automobile when the fault level is the level fault
It send for indicating that level fault occurs, and indicates that the VCU executes the Fisrt fault signal of Fisrt fault processing operation；
Second processing submodule, for when the fault level is the secondary failure, Xiang Suoshu VCU to be sent for indicating hair
Raw secondary failure, and indicate that the VCU executes the second fault-signal of the second fault handling operation.
17. device according to claim 16, which is characterized in that the first processing submodule is for including:
The VCU is indicated in the state that it is enabled for detecting current brake pedal signal, braking torque is promoted into a present count
Value, and
Indicate the VCU by current vehicle speed control below a preset vehicle speed.
18. device according to claim 15, which is characterized in that the fault processing module includes:
Third handles submodule, for sending pre-warning signal to the instrument controller ICM of automobile, indicates the ICM according to
Pre-warning signal lights signal to the output of the braking system faults lamp of automobile；
The fault code of the fault condition is stored, and freezes the default critical data of the fault condition；
And third fault-signal is sent to the middle control unit EHU of automobile, indicate that the EHU passes through vehicle-bone global positioning system
GPS search auto repair point.
19. device according to claim 15, which is characterized in that the control module includes vacuum pressure sensor and big
Air pressure force snesor；
The fault detection module includes:
First detection sub-module, for detecting the output voltage of the vacuum pressure sensor not in preset first output electricity
It presses range and the duration is more than the first preset time, the fault condition of vacuum pressure sensor failure occurs for confirmation vacuum pump；
And/or
Second detection sub-module, for detecting the output voltage of the barometric pressure sensor not in preset second output electricity
It presses range and the duration is more than the second preset time, the fault condition of barometric pressure sensor failure occurs for confirmation vacuum pump.
20. device according to claim 19, which is characterized in that the fault detection module includes:
Third detection sub-module, vacuum pressure value and the atmospheric pressure for being measured according to the vacuum pressure sensor pass
The atmospheric pressure value that sensor measures determines the vacuum degree of the vacuum pump, detects the vacuum degree lower than preset vacuum degree threshold
Value and the duration be more than third preset time when, confirmation occur rough vacuum failure fault condition；
Or
The output voltage of the vacuum pressure sensor is in first output voltage range and barometric pressure sensor survey
Lower than preset first atmospheric pressure threshold value and when the duration is more than third preset time, confirmation occurs low the atmospheric pressure value obtained
The fault condition of vacuum degree failure.
21. device according to claim 20, which is characterized in that the fault detection module includes:
4th detection sub-module, for detecting the output voltage of the vacuum pressure sensor in the first output voltage model
It encloses, the output voltage of the barometric pressure sensor is in not in the driving signal of second output voltage range and vacuum pump
In the state of enabled, when increment of the vacuum degree in the 4th preset time period is lower than preset first delta threshold, confirmation
The fault condition of force aid system for braking leakage failure occurs for the vacuum pump；
Or
The output voltage of the vacuum pressure sensor is measured in first output voltage range, the barometric pressure sensor
Atmospheric pressure value is lower than the preset second largest air pressure threshold value and the driving signal of vacuum pump is in the state of being not enabled on, it is described
Increment of the vacuum pressure value that vacuum pressure sensor measures in the 4th preset time period is lower than preset second delta threshold
When, confirm that the fault condition of force aid system for braking leakage failure occurs for the vacuum pump.
22. device according to claim 15, which is characterized in that the control module includes the driving electricity of the vacuum pump
Machine；
The fault detection module includes:
5th detection sub-module, when for detecting that the status signal of driving motor of vacuum pump indicates driving motor operating
When length is more than five preset times, confirm that the fault condition that vacuum pump often turns failure occurs for the vacuum pump.
23. device according to claim 22, which is characterized in that further include:
Rate control module, for confirming that the event that vacuum pump often turns failure occurs for the vacuum pump in the 5th detection sub-module
After hindering operating condition,
If current vehicle speed is higher than preset first speed threshold value, the driving motor for controlling the vacuum pump is in enabled state；
Or
If current vehicle speed is lower than preset second speed threshold value, the driving motor for controlling the vacuum pump is in close state；
The first speed threshold value is higher than the second speed threshold value.
24. device according to claim 15, which is characterized in that the fault detection module includes:
6th detection sub-module, for detecting the non-work of vacuum pump after the driving motor of vacuum pump transmission driving signal
Make,
Vacuum pump work described in driving signal is not sent to the driving motor of vacuum pump,
Or
In the state that vacuum pump is in enabled, the driving current of the vacuum pump is more than a pre-set current value, and duration is super
The 6th preset time is crossed, confirms that electric fault occurs for the vacuum pump.
25. device according to claim 16, which is characterized in that the control module includes vacuum pressure sensor, big
At least one of air pressure force snesor, electric stabilizing system, electric machine controller and battery management system.
26. device according to claim 25, which is characterized in that described device further include:
7th detection sub-module does not receive at least one described control module in continuous 7th preset time for detecting
Preset signals when, confirm that the fault condition that failure is lost in communication occurs for the vacuum pump.
27. device according to claim 16, which is characterized in that the level determination module includes:
First determines submodule, is used for when the fault condition is vacuum pressure sensor failure or rough vacuum failure, institute
Stating the corresponding fault level of fault condition is the level fault；Or
Second determining submodule, for being barometric pressure sensor failure, force aid system for braking leakage event when the fault condition
Barrier, vacuum pump often turn failure, failure is lost in communication or when electric fault, and the corresponding fault level of the fault condition is described
Secondary failure.
28. device according to claim 15, which is characterized in that described device further include:
Wake-up module, when for detecting that automobile ignition switch signal is in ON electricity rising edge, the output of Xiang Suoshu vacuum pump is waken up
Signal.
29. a kind of controller, including memory, processor and it is stored on the memory and can runs on the processor
Computer program, which is characterized in that the processor reads the program in the memory, executes such as claim 1 to 14
Any one of described in electric car vacuum method for controlling pump in step.
30. a kind of automobile characterized by comprising controller as claimed in claim 29.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710763019.5A CN107628017B (en) | 2017-08-30 | 2017-08-30 | Vacuum pump control method and device for electric automobile, controller and automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710763019.5A CN107628017B (en) | 2017-08-30 | 2017-08-30 | Vacuum pump control method and device for electric automobile, controller and automobile |
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| CN107628017B true CN107628017B (en) | 2019-10-18 |
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| CN201710763019.5A Active CN107628017B (en) | 2017-08-30 | 2017-08-30 | Vacuum pump control method and device for electric automobile, controller and automobile |
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|---|---|---|---|---|
| CN109572648A (en) * | 2018-10-23 | 2019-04-05 | 湖州知谷汽车零部件有限公司 | A kind of controller for vacuum pump and control method |
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