CN106812689B - Motorized vacuum method for controlling pump and control device - Google Patents
Motorized vacuum method for controlling pump and control device Download PDFInfo
- Publication number
- CN106812689B CN106812689B CN201710005883.9A CN201710005883A CN106812689B CN 106812689 B CN106812689 B CN 106812689B CN 201710005883 A CN201710005883 A CN 201710005883A CN 106812689 B CN106812689 B CN 106812689B
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- Prior art keywords
- vacuum
- pump
- entire car
- car controller
- brake
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/46—Vacuum systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/72—Electrical control in fluid-pressure brake systems in vacuum systems or vacuum booster units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention discloses a kind of Motorized vacuum method for controlling pump and control device, including entire car controller, vehicle speed sensor, brake lamp, trouble light, vacuum tank, vavuum pump, vacuum booster, the vacuum transducer in vacuum tank, the brake switch being connected with brake pedal, key switch, the wheel speed sensors for detecting vehicle tyre rotating speed, entire car controller electrically connects with vehicle speed sensor, brake lamp, trouble light, vavuum pump, vacuum transducer, brake switch, key switch, wheel speed sensors respectively；Vacuum tank passes through vacuum line and vavuum pump and vacuum booster UNICOM respectively；The characteristics of present invention accurately controls with power, and brake force is strong, saves electric power, and cost is low.
Description
Technical field
The present invention relates to electric vacuum pump control strategy technical field, accurately controlled more particularly, to one kind, brake force
By force, electric power, cost low Motorized vacuum method for controlling pump and control device are saved.
Background technology
Electric vacuum pump is a part for automobile vacuum power-assisting system, and vacuum boost system includes：Electric vacuum pump, vacuum
The parts such as tank, vacuum booster, vacuum line, wherein, electric vacuum pump is responsible for extracting vacuum；Vacuum tank is responsible for storing electronic true
The vacuum that empty pumping takes, and vacuum signal is gathered, control the trend of vacuum；Vacuum booster is responsible for driver's offer and helped
Power, driver is set to provide enough severities of braking with less pedal force, and the process is consumption vacuum.
Therefore, whether the control strategy of electric vacuum pump is reasonable, concerns the severity of braking of vehicle, has weight to the safety of vehicle
Influence.Electric vacuum pump consumption in operation is electric energy on vehicle, particularly with pure electric automobile, electric vacuum pump control plan
Slightly whether rationally, material impact can be produced to the course continuation mileage of vehicle.
Single controller is used in the prior art, and control logic is：When vacuum is less than certain value, electric vacuum pump
Start working, when vacuum reaches certain value, electric vacuum pump is stopped.The Motorized vacuum method for controlling pump of prior art is present
Following deficiency：
Start and stop pressure once it is determined that, it is difficult to change, can not accurately control；
When electric vacuum pump and associated part failure, no alarm signal output；, may be because of brake force during high speed traveling
Deficiency and cause the generation of security incident；
Start-stop is carried out based on experience value, causes power wastage；Need the line of single controller, independent part and auxiliary
Beam, improve integral vehicle cost.
The content of the invention
The present invention goal of the invention be in order to overcome it is of the prior art can not accurately control, easily occur security incident,
Waste the high deficiency of electric power, integral vehicle cost, there is provided it is a kind of accurately control, that brake force is strong, to save electric power, cost low is electronic
Vacuum method for controlling pump and control device.
To achieve these goals, the present invention uses following technical scheme：
Electric on (1-1) vehicle control unit controls vehicle, entire car controller removes all alarm signals, and closes Motorized vacuum
Pump；
(1-2) vacuum transducer gathers vacuum signal, and entire car controller is according to vacuum signal of change vacuum Vac；
Brake switch gathers brake pedal signal, and entire car controller calculates brake pedal position；Key switch detects key position, speed
Sensor detects speed；
(1-3) if key in OFF shelves, entire car controller removes all alarm signals and alarm output signal, and closes
Electric vacuum pump；Otherwise it is transferred to step (1-4)；
(1-4) if vacuum transducer collection vacuum signal it is faulty when, be transferred to step (1-5)；
Otherwise it is transferred to step (1-6)；
(1-5) exports failure alarm signal to alarm lamp；When without brake failure, electric vacuum pump is closed；When brake is stepped on
When lower, Motorized vacuum pump work, electric vacuum pump is otherwise closed；
(1-6) if key in ON shelves and speed ＜ 42km/hour, entire car controller set vavuum pump open threshold values as
A1, it is B1 that vavuum pump, which closes threshold values,；
If key, in ON shelves and speed >=42km/hour, entire car controller sets vavuum pump and opens threshold values as A2, vacuum
It is B1 that pump, which closes threshold values,；A1 ＜ A2 ＜ B1；
(1-7) removes work time out fault if Vac ＞ vavuum pumps close threshold values, removes principal fault；
If Vac ＜ vavuum pumps open threshold values, electric vacuum pump is opened；
If Vac ＜ C1, entire car controller export failure alarm signal to alarm lamp；
C1 can not meet the vacuum degree of conventional brake requirement, C1 ＜ A1 when being braked for vehicle；
Work time out fault number is provided with (1-8) entire car controller, the initial value of work time out fault number is 0；It is whole
If vehicle controller is judged as work time out fault, vehicle control unit controls vavuum pump is closed, and makes the increase of work time out fault number
1, entire car controller produces vavuum pump work single time out fault signal；
(1-9) as work time out fault number ＞ D1, entire car controller produces multiple vacuum pump work time out fault alarm
Signal；It is transferred to step (1-5)；
Gas leakage threshold values is provided with (1-10) entire car controller, entire car controller calculates vacuum leak amount L；When L >=steam leak-off valve
Value, produce principal fault alarm signal；It is transferred to step (1-5).
The electric vacuum pump control strategy of the present invention, control strategy is write in entire car controller, in that context it may be convenient to carry out
Change, different values is demarcated to every money vehicle, is advantageous to Precise control.
The entire car controller of the present invention is directed to different failures, makes fault verification, is then carried out on carload instrument disk
It has been shown that, can fully remind driver safety hidden danger.
Present invention introduces brake pedal signal, is deposited after a failure in the system of monitoring, while alarm, is made with pedal signal
For decision condition, after detecting pedal work, that is, signal is sent, electric vacuum pump is started working, and ensures to fail in brake pedal
, still can normal work under state.
The present invention can be directed to different automobile types, vacuum when adjustment electric vacuum pump is started working, and electric vacuum pump stops
Vacuum during work, electric vacuum pump judge the stand-by period of gas leakage, beginning/stopping of the electric vacuum pump under different speeds
Working vacuum degree is demarcated.On the premise of ensureing safety, electric energy is saved as far as possible.The present invention is controlled using entire car controller
System, reduces hardware, reduces the cost of vehicle.
Preferably, entire car controller detection opens brake lamp and braking is opened after brake pedal is stepped in step (1-2)
The state of pass；Otherwise the state of brake lamp and brake switch is closed.
Preferably, step (1-5) also comprises the following steps：
If after vacuum pump work, after loosening the brake, entire car controller still opens vavuum pump, and working time length is
T2。
Preferably, step (1-7) also comprises the following steps：
If Vac≤vavuum pump closes threshold values, Vac >=vavuum pump opens threshold values, vacuum pump work and loosens the brake
Afterwards, no time out fault, it is T1 that entire car controller, which sets vavuum pump maximum operating time length,.When time out fault refers to vacuum pump work
Between length ＞ T1.
Preferably, step (1-8) also comprises the following steps：
If after vacuum pump work, after loosening the brake, entire car controller still controls vavuum pump to open, if the opening time
Length is more than T1, and vacuum is not up to threshold values B1, is then judged as time out fault.
Preferably, also comprise the following steps between step (1-8) and (1-9)：
As work time out fault number≤D1, step (1-10) is transferred to.
Preferably, vacuum leak amount computational methods are as follows：
Entire car controller utilizesCalculate vacuum leak amount L；
Wherein, Pa1 is vacuum when last vavuum pump is stopped, and Pa2 is current vacuum, and T1 ' is upper one
At the time of when secondary vavuum pump is stopped, at the time of T2 ' is current.
Vacuum leak amount it is upper once vavuum pump is stopped when calculated to when stepping on brake or when lower electric, afterwards not
Calculate again.
A kind of control device Motorized vacuum method for controlling pump suitable for described in claim 1, including full-vehicle control
Device, vehicle speed sensor, brake lamp, trouble light, vacuum tank, vavuum pump, vacuum booster, the vacuum sensing in vacuum tank
Device, the brake switch being connected with brake pedal, key switch, the wheel speed sensors for detecting vehicle tyre rotating speed, vehicle control
Device processed passes with vehicle speed sensor, brake lamp, trouble light, vavuum pump, vacuum transducer, brake switch, key switch, wheel speed respectively
Sensor electrically connects；Vacuum tank passes through vacuum line and vavuum pump and vacuum booster UNICOM respectively.
Preferably, also including display, entire car controller electrically connects with display.
Therefore, the present invention has the advantages that：Power accurately controls, and brake force is strong, saves electric power, cost
It is low.
Brief description of the drawings
Fig. 1 is a kind of theory diagram of the present invention；
Fig. 2 is a kind of flow chart of the present invention.
In figure：Entire car controller 1, vehicle speed sensor 2, brake lamp 3, trouble light 4, vacuum tank 5, vavuum pump 6, vacuum servo
Device 7, vacuum transducer 8, brake switch 9, key switch 10, wheel speed sensors 11, display 12.
Embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
Embodiment as shown in Figure 1 is a kind of control device suitable for Motorized vacuum method for controlling pump, including vehicle control
Device 1 processed, vehicle speed sensor 2, brake lamp 3, trouble light 4, vacuum tank 5, vavuum pump 6, vacuum booster 7, in vacuum tank
Vacuum transducer 8, the brake switch 9 being connected with brake pedal, key switch 10, the wheel speed biography for detecting vehicle tyre rotating speed
Sensor 11, entire car controller respectively with vehicle speed sensor, brake lamp, trouble light, vavuum pump, vacuum transducer, brake switch, key
Spoon switch, wheel speed sensors electrical connection；Vacuum tank passes through vacuum line and vavuum pump and vacuum booster UNICOM respectively.Also include
Display, entire car controller electrically connect with display 12.
As shown in Fig. 2 a kind of Motorized vacuum method for controlling pump, comprises the following steps：
Step 100, it is electric on vehicle control unit controls vehicle, remove all alarm signals；
Electric on vehicle control unit controls vehicle, entire car controller removes all alarm signals, and closes electric vacuum pump；
Step 200, signal acquisition；
Vacuum transducer gathers vacuum signal, and entire car controller is according to vacuum signal of change vacuum Vac；Braking is opened
Collection brake pedal signal is closed, entire car controller calculates brake pedal position；Key switch detects key position, vehicle speed sensor
Detect speed；
Step 300, alarm signal is removed；
If key, in OFF shelves, entire car controller removes all alarm signals and alarm output signal, and closes electronic true
Empty pump；Otherwise it is transferred to step 300；
Step 400, vacuum transducer failure
If vacuum transducer collection vacuum signal is faulty, step 500 is transferred to；
Otherwise it is transferred to step 600；
Step 500, troubleshooting
Failure alarm signal is exported to alarm lamp；When without brake failure, electric vacuum pump is closed；When brake is stepped on,
Motorized vacuum pump work, otherwise closes electric vacuum pump；
If after vacuum pump work, after loosening the brake, entire car controller still opens vavuum pump, and working time length is
12s；
Step 600, set vavuum pump and open threshold values and vavuum pump closing threshold values；
If key, in 0N shelves and speed ＜ 42km/hour, entire car controller sets vavuum pump and opens threshold values as 48Kpa,
It is 73Kpa that vavuum pump, which closes threshold values,；
If key, in ON shelves and speed >=42km/hour, entire car controller sets vavuum pump and opens threshold values as 58Kpa,
It is 73Kpa that vavuum pump, which closes threshold values,；
Step 700, vavuum pump maximum operating time length is set；
If Vac≤vavuum pump closes threshold values, Vac >=vavuum pump opens threshold values, vacuum pump work and loosens the brake
Afterwards, no time out fault, it is 15s that entire car controller, which sets vavuum pump maximum operating time length,；
If Vac ＞ vavuum pumps close threshold values, work time out fault is removed, removes principal fault；If Vac ＜ vavuum pumps are opened
Threshold values, open electric vacuum pump；
If Vac ＜ 30Kpa, entire car controller export failure alarm signal to alarm lamp；
Step 800, vavuum pump working time length single time-out alarm；
Work time out fault number is provided with entire car controller, the initial value of work time out fault number is 0；Full-vehicle control
If device is judged as work time out fault, vehicle control unit controls vavuum pump is closed, and work time out fault number is increased by 1, vehicle
Controller produces vavuum pump work single time out fault signal；
If after vacuum pump work, after loosening the brake, entire car controller still controls vavuum pump to open, if the opening time
Length is more than 15s, and vacuum is not up to threshold values 73Kpa, is then judged as time out fault.
When work time out fault number≤3, step 1000 is transferred to；
Step 900, vavuum pump working time length repeatedly time-out alarm；
As work time out fault number ＞ 3, entire car controller produces multiple vacuum pump work time out fault alarm signal；Turn
Enter step 500；
Step 1000, principal fault is alarmed；
Gas leakage threshold values is provided with entire car controller, entire car controller calculates vacuum leak amount L；When L >=gas leakage threshold values, produce
Principal fault alarm signal；It is transferred to step 500.
Wherein, vacuum leak amount computational methods are as follows：
Entire car controller utilizesCalculate vacuum leak amount L；
Wherein, Pa1 is vacuum when last vavuum pump is stopped, and Pa2 is current vacuum, and T1 ' is upper one
At the time of when secondary vavuum pump is stopped, at the time of T2 ' is current.
Display is used to show various alarm signals, is easy to driver to know warning message in time.
In key-off, vavuum pump is stopped the present invention, and vacuum pump work is just allowed when key is opened.
When speed is less than 42km/h, using startup pressure of the 48kpa as electric vacuum pump, speed is higher than 42km/h
When, using startup pressure of the 58kpa as electric vacuum pump；Different speed interval sections uses different startup pressure, can be with
On the premise of severity of braking is ensured, electric energy is saved.
When system has leakage problem, traditional electric vacuum pump control strategy can open after vacuum is less than initiation value
Dynamic, electric vacuum pump can frequently start；Continuous working period of the invention by monitoring electric vacuum pump, work as electric vacuum pump
After continuous working period is more than 15S, i.e., there is failure in decision-making system, then using fault mode, using pedal signal as electronic
The judgement signal of vacuum pump startup.To realize precise controlling, different step is taken in different situations, ensures that electric power energy is rationally sharp
With.
It should be understood that the present embodiment is only illustrative of the invention and is not intended to limit the scope of the invention.In addition, it is to be understood that
After having read the content of the invention lectured, those skilled in the art can make various changes or modifications to the present invention, these etc.
Valency form equally falls within the application appended claims limited range.
Claims (9)
1. a kind of Motorized vacuum method for controlling pump, it is characterized in that, comprise the following steps：
Electric on (1-1) vehicle control unit controls vehicle, entire car controller removes all alarm signals, and closes electric vacuum pump；
(1-2) vacuum transducer gathers vacuum signal, and entire car controller is according to vacuum signal of change vacuum Vac；Braking
Switch collection brake pedal signal, entire car controller calculate brake pedal position；Key switch detects key position, speed sensing
Device detects speed；
(1-3) if key in OFF shelves, entire car controller removes all alarm signals and alarm output signal, and closes electronic
Vavuum pump；Otherwise it is transferred to step (1-4)；
(1-4) if vacuum transducer collection vacuum signal it is faulty when, be transferred to step (1-5)；
Otherwise it is transferred to step (1-6)；
(1-5) exports failure alarm signal to alarm lamp；When without brake failure, electric vacuum pump is closed；When brake is stepped on,
Motorized vacuum pump work, otherwise closes electric vacuum pump；
(1-6) if key in ON shelves and speed ＜ 42km/hour, entire car controller set vavuum pump open threshold values as A1, very
It is B1 that empty pump, which closes threshold values,；
If key, in ON shelves and speed >=42km/hour, entire car controller sets vavuum pump and opens threshold values as A2, and vavuum pump closes
Valve closing value is B1；A1 ＜ A2 ＜ B1；
(1-7) removes work time out fault if Vac ＞ vavuum pumps close threshold values, removes principal fault；
If Vac ＜ vavuum pumps open threshold values, electric vacuum pump is opened；
If Vac ＜ C1, entire car controller export failure alarm signal to alarm lamp；
C1 can not meet the vacuum degree of conventional brake requirement, C1 ＜ A1 when being braked for vehicle；
Work time out fault number is provided with (1-8) entire car controller, the initial value of work time out fault number is 0；Vehicle control
If device processed is judged as work time out fault, vehicle control unit controls vavuum pump is closed, and makes work time out fault number increase by 1, whole
Vehicle controller produces vavuum pump work single time out fault signal；
(1-9) produces multiple vacuum pump work time out fault alarm signal when work time out fault number ＞ D1, entire car controller；
It is transferred to step (1-5)；
Gas leakage threshold values is provided with (1-10) entire car controller, entire car controller calculates vacuum leak amount L；When L >=gas leakage threshold values, production
Raw principal fault alarm signal；It is transferred to step (1-5).
2. Motorized vacuum method for controlling pump according to claim 1, it is characterized in that, entire car controller is examined in step (1-2)
Survey after brake pedal is stepped on, open the state of brake lamp and brake switch；Otherwise the state of brake lamp and brake switch is closed.
3. Motorized vacuum method for controlling pump according to claim 1, it is characterized in that, step (1-5) also comprises the following steps：
If after vacuum pump work, after loosening the brake, entire car controller still opens vavuum pump, and working time length is T2.
4. Motorized vacuum method for controlling pump according to claim 1, it is characterized in that, step (1-7) also comprises the following steps：
If Vac≤vavuum pump closes threshold values, Vac >=vavuum pump opens threshold values, vacuum pump work and after loosening the brake, nothing
Time out fault, it is T1 that entire car controller, which sets vavuum pump maximum operating time length,.
5. Motorized vacuum method for controlling pump according to claim 1, it is characterized in that, step (1-8) also comprises the following steps：
If after vacuum pump work, after loosening the brake, entire car controller still controls vavuum pump to open, if opening time length
More than T1, vacuum is not up to threshold values B1, then is judged as time out fault.
6. Motorized vacuum method for controlling pump according to claim 1, it is characterized in that, also wrapped between step (1-8) and (1-9)
Include following steps：
As work time out fault number≤D1, step (1-10) is transferred to.
7. according to the Motorized vacuum method for controlling pump described in claim 1 or 2 or 3 or 4 or 5 or 6, it is characterized in that, vacuum leak
It is as follows to measure computational methods：
Entire car controller utilizesCalculate vacuum leak amount L；
Wherein, Pa1 is vacuum when last vavuum pump is stopped, and Pa2 is current vacuum, and T1 ' is last true
At the time of when empty pump is stopped, at the time of T2 ' is current.
8. the control device a kind of Motorized vacuum method for controlling pump suitable for described in claim 1, it is characterized in that, including it is whole
Vehicle controller (1), vehicle speed sensor (2), brake lamp (3), trouble light (4), vacuum tank (5), vavuum pump (6), vacuum booster
(7), the vacuum transducer in vacuum tank (8), the brake switch (9) being connected with brake pedal, key switch (10), be used for
Detect the wheel speed sensors (11) of vehicle tyre rotating speed, entire car controller respectively with vehicle speed sensor, brake lamp, trouble light, true
Empty pump, vacuum transducer, brake switch, key switch, wheel speed sensors electrical connection；Vacuum tank respectively by vacuum line with it is true
Empty pump and vacuum booster UNICOM.
9. the control device in Motorized vacuum method for controlling pump according to claim 8, it is characterized in that, in addition to display
Device, entire car controller electrically connect with display (12).
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| CN201710005883.9A CN106812689B (en) | 2017-01-04 | 2017-01-04 | Motorized vacuum method for controlling pump and control device |
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|---|---|---|---|
| CN201710005883.9A CN106812689B (en) | 2017-01-04 | 2017-01-04 | Motorized vacuum method for controlling pump and control device |
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| CN103043049A (en) * | 2012-12-29 | 2013-04-17 | 深圳市陆地方舟电动车有限公司 | Vacuum brake boosting control system and vacuum brake boosting control method for electric cars |
| DE102014214869A1 (en) * | 2014-07-29 | 2016-02-04 | Robert Bosch Gmbh | Method for operating a braking device, control unit |
| CN104477158B (en) * | 2014-11-19 | 2017-01-18 | 华晨汽车集团控股有限公司 | Monitoring method for electric vehicle electric vacuum pump |
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