CN109532812A - A kind of new-energy automobile vacuum boost system vacuum leak alarm strategy - Google Patents
A kind of new-energy automobile vacuum boost system vacuum leak alarm strategy Download PDFInfo
- Publication number
- CN109532812A CN109532812A CN201811424060.0A CN201811424060A CN109532812A CN 109532812 A CN109532812 A CN 109532812A CN 201811424060 A CN201811424060 A CN 201811424060A CN 109532812 A CN109532812 A CN 109532812A
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- Prior art keywords
- vacuum
- signal
- vcu
- brake
- failure
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Classifications
-
- 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
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention discloses a kind of new-energy automobile vacuum boost system vacuum leak alarm strategies, and wherein vacuum boost system change is small, and general vehicle can carry brake pedal switch, control strategy need to only be increased on VCU, monitoring vacuum system reveals failure in time, and reminds driver, reduces loss.
Description
Technical field:
The present invention relates to a kind of new-energy automobile vacuum boost system vacuum leak alarm strategies, belong to new-energy automobile
Technical field.
Background technique:
As shown in Figure 1, it monitors system for existing vacuum boost system vacuum failure at present, wherein vacuum boost system work
Make principle are as follows:
(1), brake pedal inputs brake to system；
(2), after being connected to brake input, the vacuum that vacuum booster is stored using vacuum tank is helped to brake offer
Power；
(3), vacuum tank stores vacuum and discharges vacuum to vacuum booster；
(4), vacuum pump starts to vacuumize after being connected to B/P EGR Back Pressure Transducer EGR starting work order, and conveys vacuum to vacuum tank；
(5), B/P EGR Back Pressure Transducer EGR is mentioned by the vacuum degree of monitoring vacuum tank according to the work upper lower limit value of setting to vacuum pump
For start and stop working signal.
Vacuum boost system vacuum failure monitoring principle are as follows:
(1), B/P EGR Back Pressure Transducer EGR monitors vacuum tank vacuum degree, reaches the failure lower limit value of setting (not influence vacuum pump just
Often work, failure lower limit value are lower than lower work threshold value), B/P EGR Back Pressure Transducer EGR sends vacuum failure signal to VCU；
(2), VCU receives the vacuum failure signal that B/P EGR Back Pressure Transducer EGR is sent, and transmits signals to instrument by CAN bus
Table；
(3), instrument receives the vacuum failure signal of VCU transmission, shows in instrumentFailure；
Vacuum boost system vacuum failure monitors disadvantage: B/P EGR Back Pressure Transducer EGR does not monitor failure lower limit value also, and vacuum pump is
Through supplementing vacuum to system.Because vacuum degree reaches vacuum tank lower work threshold value meeting horse back system vacuum pump work, vacuum pump
Vacuum is supplemented to vacuum tank to stop until reaching work upper limit value.At this moment vacuum system will continue to leak, until reaching under work
Limit value simultaneously repeats the above work.
This phenomenon can obviously increase the working frequency of vacuum pump, increase the probability of vacuum pump damage, and increase without reason
The power consumption of vehicle, and cover vacuum system leakage failure.
Therefore, it is necessory to be improved to the prior art to solve the deficiency of the prior art.
Summary of the invention:
The present invention is to provide a kind of new-energy automobile vacuum servo system to solve the above-mentioned problems of the prior art
Vacuum leak of uniting alarm strategy.
The technical solution adopted in the present invention has: a kind of new-energy automobile vacuum boost system vacuum leak alarm strategy,
It is characterized by comprising following steps:
(1), brake pedal inputs brake to system；
(2), after being connected to brake input, the vacuum that vacuum booster is stored using vacuum tank is helped to brake offer
Power；
(3), vacuum tank stores vacuum and discharges vacuum to vacuum booster；
(4), vacuum pump starts to vacuumize after being connected to B/P EGR Back Pressure Transducer EGR starting work order, and conveys vacuum to vacuum tank；
(5), B/P EGR Back Pressure Transducer EGR is mentioned by the vacuum degree of monitoring vacuum tank according to the work upper lower limit value of setting to vacuum pump
For start and stop working signal；
(6), increase brake pedal switch, brake pedal VCU receives opening signal (signal 0), loosens the brake
VCU receives closure signal (signal 1)；
(7), the failure lower limit value that former B/P EGR Back Pressure Transducer EGR monitors is adjusted to lower work threshold value；
(8), after VCU receives signal 1, start timing using internal clocking, and start to execute after 1min and judge language
Sentence --- " receiving vacuum enabling signal? "；
(9) if, VCU receive " vacuum enabling signal " indicate be not used braking system in the case where, there is vacuum without reason
Pump work, while also illustrating system there are vacuum leaks, and vacuum system fault-signal is sent to instrument by CAN bus；
(10), instrument receives the vacuum failure signal of VCU transmission, shows in instrumentFailure.
The invention has the following beneficial effects:
1, vacuum boost system change is small, and general vehicle can carry brake pedal switch, need to only increase control plan on VCU
Slightly；
2, monitoring vacuum system reveals failure in time, and reminds driver, reduces loss.
Detailed description of the invention:
Fig. 1 is that existing vacuum boost system vacuum failure monitors flow chart.
Fig. 2 is the tactful schematic diagram of new-energy automobile vacuum boost system vacuum leak of the present invention alarm.
Specific embodiment:
The present invention will be further described below with reference to the drawings.
Shown in referring to figure 2., new-energy automobile vacuum boost system vacuum leak alarm strategy of the present invention, including walk as follows
It is rapid:
(1), brake pedal inputs brake to system；
(2), after being connected to brake input, the vacuum that vacuum booster is stored using vacuum tank is helped to brake offer
Power；
(3), vacuum tank stores vacuum and discharges vacuum to vacuum booster；
(4), vacuum pump starts to vacuumize after being connected to B/P EGR Back Pressure Transducer EGR starting work order, and conveys vacuum to vacuum tank；
(5), B/P EGR Back Pressure Transducer EGR is mentioned by the vacuum degree of monitoring vacuum tank according to the work upper lower limit value of setting to vacuum pump
For start and stop working signal；
(6), increase brake pedal switch, brake pedal VCU receives opening signal (signal 0), loosens the brake
VCU receives closure signal (signal 1)；
(7), the failure lower limit value that former B/P EGR Back Pressure Transducer EGR monitors is adjusted to lower work threshold value；
(8), after VCU receives signal 1, start timing using internal clocking, and start to execute after 1min and judge language
Sentence --- " receiving vacuum enabling signal? "；
(9) if, VCU receive " vacuum enabling signal " indicate be not used braking system in the case where, there is vacuum without reason
Pump work, while also illustrating system there are vacuum leaks, and vacuum system fault-signal is sent to instrument by CAN bus；
(10), instrument receives the vacuum failure signal of VCU transmission, shows in instrumentFailure.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
It for member, can also make several improvements without departing from the principle of the present invention, these improvement also should be regarded as of the invention
Protection scope.
Claims (1)
1. a kind of new-energy automobile vacuum boost system vacuum leak alarm strategy, characterized by the following steps:
(1), brake pedal inputs brake to system；
(2), after being connected to brake input, vacuum booster provides power-assisted to brake using the vacuum that vacuum tank stores；
(3), vacuum tank stores vacuum and discharges vacuum to vacuum booster；
(4), vacuum pump starts to vacuumize after being connected to B/P EGR Back Pressure Transducer EGR starting work order, and conveys vacuum to vacuum tank；
(5), B/P EGR Back Pressure Transducer EGR is opened by the vacuum degree of monitoring vacuum tank according to the work upper lower limit value of setting to vacuum pump offer
Dynamic and silence signal；
(6), increase brake pedal switch, brake pedal VCU is received opening signal (signal 0), and the VCU that loosens the brake is received
To closure signal (signal 1)；
(7), the failure lower limit value that former B/P EGR Back Pressure Transducer EGR monitors is adjusted to lower work threshold value；
(8), after VCU receives signal 1, start timing using internal clocking, and start to execute after 1min and judge language
Sentence --- " receiving vacuum enabling signal? "；
(9) if, VCU receive " vacuum enabling signal " indicate be not used braking system in the case where, there is vacuum pump work without reason
Make, while also illustrating system there are vacuum leaks, and vacuum system fault-signal is sent to instrument by CAN bus；
(10), instrument receives the vacuum failure signal of VCU transmission, shows in instrumentFailure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811424060.0A CN109532812A (en) | 2018-11-27 | 2018-11-27 | A kind of new-energy automobile vacuum boost system vacuum leak alarm strategy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811424060.0A CN109532812A (en) | 2018-11-27 | 2018-11-27 | A kind of new-energy automobile vacuum boost system vacuum leak alarm strategy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109532812A true CN109532812A (en) | 2019-03-29 |
Family
ID=65850699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811424060.0A Pending CN109532812A (en) | 2018-11-27 | 2018-11-27 | A kind of new-energy automobile vacuum boost system vacuum leak alarm strategy |
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| Country | Link |
|---|---|
| CN (1) | CN109532812A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110969819A (en) * | 2019-11-27 | 2020-04-07 | 南京金龙新能源汽车研究院有限公司 | Strategy for formulating VAC alarm limit value |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2936861Y (en) * | 2006-06-15 | 2007-08-22 | 比亚迪股份有限公司 | Electric vehicle vacuum power brake device |
| CN101791980A (en) * | 2010-02-11 | 2010-08-04 | 中国汽车技术研究中心 | Electric vacuum servo device control strategy of electric car brake |
| CN105398436A (en) * | 2015-12-30 | 2016-03-16 | 北京新能源汽车股份有限公司 | Brake boosting system of vehicle and vehicle with same |
| CN106812689A (en) * | 2017-01-04 | 2017-06-09 | 浙江零跑科技有限公司 | Motorized vacuum method for controlling pump and control device |
-
2018
- 2018-11-27 CN CN201811424060.0A patent/CN109532812A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2936861Y (en) * | 2006-06-15 | 2007-08-22 | 比亚迪股份有限公司 | Electric vehicle vacuum power brake device |
| CN101791980A (en) * | 2010-02-11 | 2010-08-04 | 中国汽车技术研究中心 | Electric vacuum servo device control strategy of electric car brake |
| CN105398436A (en) * | 2015-12-30 | 2016-03-16 | 北京新能源汽车股份有限公司 | Brake boosting system of vehicle and vehicle with same |
| CN106812689A (en) * | 2017-01-04 | 2017-06-09 | 浙江零跑科技有限公司 | Motorized vacuum method for controlling pump and control device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110969819A (en) * | 2019-11-27 | 2020-04-07 | 南京金龙新能源汽车研究院有限公司 | Strategy for formulating VAC alarm limit value |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190329 |