CN106812609A - vacuum degree control method, device, system and automobile - Google Patents
vacuum degree control method, device, system and automobile Download PDFInfo
- Publication number
- CN106812609A CN106812609A CN201710005290.2A CN201710005290A CN106812609A CN 106812609 A CN106812609 A CN 106812609A CN 201710005290 A CN201710005290 A CN 201710005290A CN 106812609 A CN106812609 A CN 106812609A
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- China
- Prior art keywords
- vacuum degree
- vacuum
- parameter
- degree control
- threshold value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
-
- 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
- B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
- F02D2009/0201—Arrangements; Control features; Details thereof
- F02D2009/024—Increasing intake vacuum
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
The present invention provides a kind of vacuum degree control method, device, system and automobile, wherein, method includes：Obtain brake signal parameter, engine state parameters and vacuum parameter；Idling is in when the number of times that brake signal parameter acquiring is arrived is equal to or more than brake number of times threshold value, engine state parameters and when vacuum parameter is less than vacuum threshold value, vacuum degree deficiency cue is produced, to point out driver by clutch separation.Vacuum degree control method, device, system and the automobile that the present invention is provided can improve vacuum after continuity point touches on the brake, and then improve braking effect.
Description
Technical field
The present invention relates to automobile brake control technology, more particularly to a kind of vacuum degree control method, device, system and vapour
Car.
Background technology
Vacuum is that the piston in automobile engine is produced in the course of the work, is that of influence skidding is important
Parameter.In existing some small displacement manual gear vehicles, when automobile is under idling mode, continuity point touches on the brake 3-4
After secondary, engine speed reduction, but when engine speed decreases below idling and limits speed, to ensure that engine is normally transported
Turn, then by air throttle close to standard-sized sheet, cause vacuum degree deficiency, and be difficult to fast quick-recovery in a short time, result in brake
It is hardened, and then reduces braking effect.
For drawbacks described above, electronic vacuum pump can be installed in automobile, to make up the problem of vacuum degree deficiency, but it is electric
The price of sub- vavuum pump is higher, improves the manufacturing cost of automobile.
The content of the invention
The present invention provides a kind of vacuum degree control method, device, system and automobile, for can after continuity point touches on the brake
Vacuum is improved, and then improves braking effect.
One aspect of the present invention provides a kind of vacuum degree control method, including：
Obtain brake signal parameter, engine state parameters and vacuum parameter；
When brake signal parameter acquiring to number of times be equal to or more than brake number of times threshold value, engine state parameters and be in
Idling and when vacuum parameter is less than vacuum threshold value, produces vacuum degree deficiency cue, to point out the driver will be from
Clutch is separated.
Vacuum degree control method as described above, it is characterised in that after vacuum degree deficiency cue is produced, also wrap
Include：
Obtain clutched state parameter；
When clutch state parameter remains as engagement state in Preset Time, air throttle is opened to maximum limit in control
Degree.
Vacuum degree control method as described above, it is characterised in that the vacuum threshold value is 20kPa.
Vacuum degree control method as described above, it is characterised in that the brake number of times threshold value is three times.
Vacuum degree control method as described above, it is characterised in that the Preset Time is 2 seconds.
Vacuum degree control method as described above, it is characterised in that the vacuum degree deficiency cue includes：Audio,
Light or picture display signal.
Another aspect of the present invention provides a kind of vacuum degree control device, including：
Parameter acquisition module, for obtaining brake signal parameter, engine state parameters and vacuum parameter；
Signal generator module, for the number of times that is arrived when brake signal parameter acquiring be equal to or more than brake number of times threshold value,
Engine state parameters are in idling and when vacuum parameter is less than vacuum threshold value, produce vacuum degree deficiency prompting letter
Number, to indicate driver by clutch separation.
Vacuum degree control device as described above, the parameter acquisition module is additionally operable to producing vacuum degree deficiency prompting
After signal, clutched state parameter is obtained；
Described device also includes：
Throttle control module, for when clutch state parameter remains as engagement state in Preset Time, controlling
Air throttle is opened to greatest extent.
Another aspect of the present invention provides a kind of vacuum degree control system, including：
Controller, including vacuum degree control device as described above；
Execution equipment, vacuum degree deficiency cue is performed for the control according to vacuum degree control device.
Another aspect of the present invention provides a kind of automobile, including vacuum degree control system as described above.
The technical scheme that the present invention is provided, by obtaining brake signal parameter, engine state parameters and vacuum parameter,
The number of times arrived when brake signal parameter acquiring be equal to or more than brake number of times threshold value, engine state parameters be in idling and
When vacuum parameter is less than vacuum threshold value, controller produces vacuum degree deficiency cue, to point out the driver will be from
Clutch is separated, then when driver steps on clutch, after clutch separation, the load of engine reduces, and the aperture of air throttle reduces,
Vacuum is recovered rapidly, to ensure good braking effect.
Brief description of the drawings
Fig. 1 is the flow chart of the vacuum degree control method that the embodiment of the present invention one is provided；
Fig. 2 is the flow chart of the vacuum degree control method that the embodiment of the present invention two is provided；
Fig. 3 is the structural representation of the vacuum degree control device that the embodiment of the present invention three is provided；
Fig. 4 is the structural representation of the vacuum degree control device that the embodiment of the present invention four is provided；
Fig. 5 is the structural representation of the vacuum degree control system that the embodiment of the present invention five is provided.
Specific embodiment
Embodiment one
Fig. 1 is the flow chart of the vacuum degree control method that the embodiment of the present invention one is provided.The present embodiment provides a kind of vacuum
Degree control method, can be applied in automotive field, and the method can be performed by the controller in vacuum degree control system, can be with
Realized by way of software/hardware.As shown in figure 1, the vacuum degree control method can include：
Step 101, controller obtain brake signal parameter, engine state parameters and vacuum parameter.
Wherein, brake signal parameter can be by controller local area network (Controller Area Network, abbreviation：
CAN) bus is transmitted, specifically, the sensor that can be sensed by braking state is detected, by brake signal parameter hair
CAN is delivered to, controller reads brake signal parameter from CAN.
Engine state parameters can be several states residing for engine, for example：Idling mode, normal operation
Deng.For the mode that software is realized, flag bit can be set up to each state, when engine is in idling mode, will
Idling mode flag bit set.
Vacuum parameter can be detected by the sensor for measurement of vacuum, be then forwarded to CAN, then by
Controller reads from CAN.
Controller can be electronic control unit (Electronic Control Unit, abbreviation：), or can also ECU
It is the controller of other models.
Step 102, the number of times arrived when brake signal parameter acquiring are equal to or more than brake number of times threshold value, engine condition
Parameter is in idling and when vacuum parameter is less than vacuum threshold value, and controller produces vacuum degree deficiency cue, with
Driver is pointed out by clutch separation.
Controller is received after above three parameter, is processed accordingly respectively.
For brake signal parameter, after brake signal parameter is received, controller can be to the brake signal that receives
Parameter is counted, and current count value is compared with brake number of times threshold value.
For engine state parameters, then judge whether idling mode flag bit is " 1 ".
For vacuum parameter, with vacuum threshold value can be compared vacuum parameter by controller.
When controller learns that the number of times of brake signal parameter is equal to or more than brake number of times threshold value and idling mode mark
Will position for " 1 " and vacuum parameter be less than vacuum threshold value when, controller need not adjust the aperture of air throttle, only produce true
Reciprocal of duty cycle deficiency cue, to point out driver to step on clutch, by clutch separation.
When driver steps on clutch, after clutch separation, the load of engine reduces, and the aperture of air throttle reduces, very
Reciprocal of duty cycle is recovered rapidly, to ensure good braking effect.
The technical scheme that the present embodiment is provided, is joined by obtaining brake signal parameter, engine state parameters and vacuum
Number, the number of times arrived when brake signal parameter acquiring be equal to or more than brake number of times threshold value, engine state parameters be in idling,
And when vacuum parameter is less than vacuum threshold value, controller produces vacuum degree deficiency cue, to point out driver to incite somebody to action
Clutch separation, then when driver steps on clutch, after clutch separation, the load of engine reduces, and the aperture of air throttle subtracts
Small, vacuum is recovered rapidly, to ensure good braking effect.The technical scheme provided using the present embodiment, then need not pacify
Dress electronic vacuum pump, it is cost-effective.
Embodiment two
Fig. 2 is the flow chart of the vacuum degree control method that the embodiment of the present invention two is provided.The present embodiment is in above-mentioned implementation
On the basis of example, vacuum degree control method is further optimized, the method can be held by the controller in vacuum degree control system
OK, can be realized by way of software/hardware.As shown in Fig. 2 after above-mentioned steps 102, i.e.,：Producing vacuum not
After sufficient cue, also include：
Step 103, controller obtain clutched state parameter.
Clutch bonding state parameter includes two kinds of clutched state and clutch separation state.The parameter can be used
Existing method is obtained in the prior art, detects the state of clutch for example with sensor.
Step 104, when clutch state parameter remains as engagement state in Preset Time, controller control is by solar term
Door is opened to greatest extent.
Can start timing before step 103 execution, and judge whether clutch state parameter is changed into timing time
Released state, if before timing time reaches Preset Time, clutch is changed into released state, then show that driver has stepped on
Clutch；If after timing time reaches Preset Time, clutch remains as engagement state, shows that driver does not step on yet
Clutch, then controller need to start and air throttle is controlled and adjusted, air throttle is opened to greatest extent, so that engine
Recover to rotating speed of target, prevent engine misses.
The technical scheme that the present embodiment is provided, is joined by obtaining brake signal parameter, engine state parameters and vacuum
Number, the number of times arrived when brake signal parameter acquiring be equal to or more than brake number of times threshold value, engine state parameters be in idling,
And when vacuum parameter is less than vacuum threshold value, controller produces vacuum degree deficiency cue, to point out driver to incite somebody to action
Clutch separation, then when driver steps on clutch, after clutch separation, the load of engine reduces, and the aperture of air throttle subtracts
Small, vacuum is recovered rapidly, to ensure good braking effect.Further, if in Preset Time, clutch state parameter
Engagement state is remained as, then needs control to open to greatest extent, so that engine recovers to rotating speed of target air throttle, it is to avoid
It is flame-out, braking effect can be not only improved, also improve driving security.
On the basis of above-mentioned two embodiment, brake number of times threshold value can be three times, and vacuum threshold value can be
20kPa, then when continuously acquiring to three brake signal parameters, and engine state parameters are in idling, and vacuum parameter
During less than 20kPa, controller produces vacuum degree deficiency cue, to point out driver to step on clutch.
Further, above-mentioned Preset Time can be 2 seconds, then after controller produces vacuum degree deficiency cue 2 seconds,
Clutch is not separated yet, then controller need to control air throttle to open to greatest extent.
Above-mentioned vacuum degree deficiency cue includes：Audio, light or picture display signal, can be one of which or extremely
Few two kinds combination, for example, point out driver by alert audio, by alarming lamp prompt driver, or panel before operation
Instrument board or display screen on the display alarm picture prompting mode such as driver.
Embodiment three
Fig. 3 is the structural representation of the vacuum degree control device that the embodiment of the present invention three is provided.As shown in figure 3, this implementation
Example provides a kind of vacuum degree control device, including：Parameter acquisition module 11 and signal generator module 12.
Wherein, parameter acquisition module 11 is used to obtain brake signal parameter, engine state parameters and vacuum parameter.Letter
The number of times that number generation module 12 is used to be arrived when brake signal parameter acquiring is equal to or more than brake number of times threshold value, engine condition
Parameter is in idling and when vacuum parameter is less than vacuum threshold value, produces vacuum degree deficiency cue, to indicate to drive
The person of sailing is by clutch separation.
The technical scheme that the present embodiment is provided, is joined by obtaining brake signal parameter, engine state parameters and vacuum
Number, the number of times arrived when brake signal parameter acquiring be equal to or more than brake number of times threshold value, engine state parameters be in idling,
And when vacuum parameter is less than vacuum threshold value, controller produces vacuum degree deficiency cue, to point out driver to incite somebody to action
Clutch separation, then when driver steps on clutch, after clutch separation, the load of engine reduces, and the aperture of air throttle subtracts
Small, vacuum is recovered rapidly, to ensure good braking effect.
Above-mentioned vacuum degree control device can perform the method that any embodiment of the present invention is provided, and possess execution method corresponding
Functional module and beneficial effect.
Example IV
Above-mentioned parameter acquisition module 11 is additionally operable to after vacuum degree deficiency cue is produced, and obtains clutch joint shape
State parameter.
Fig. 4 is the structural representation of the vacuum degree control device that the embodiment of the present invention four is provided.As shown in figure 4, this implementation
The vacuum degree control device that example is provided also includes：Throttle control module 13, for when the clutch state ginseng in Preset Time
When number remains as engagement state, air throttle is opened to greatest extent in control.
The technical scheme that the present embodiment is provided, is joined by obtaining brake signal parameter, engine state parameters and vacuum
Number, the number of times arrived when brake signal parameter acquiring be equal to or more than brake number of times threshold value, engine state parameters be in idling,
And when vacuum parameter is less than vacuum threshold value, controller produces vacuum degree deficiency cue, to point out driver to incite somebody to action
Clutch separation, then when driver steps on clutch, after clutch separation, the load of engine reduces, and the aperture of air throttle subtracts
Small, vacuum is recovered rapidly, to ensure good braking effect.Further, when the clutch state parameter in Preset Time
When remaining as engagement state, air throttle is opened to greatest extent, promoting engine to recover to rotating speed of target in control, it is to avoid put out
Fire.
Above-mentioned vacuum degree control device can perform the method that any embodiment of the present invention is provided, and possess execution method corresponding
Functional module and beneficial effect.
Embodiment five
Fig. 5 is the structural representation of the vacuum degree control system that the embodiment of the present invention five is provided.As shown in figure 5, this implementation
Example provides a kind of vacuum degree control system, including：Controller 21 and actuator 22, wherein, controller 21 includes any as described above
The vacuum degree control device that embodiment is provided.Execution equipment 22 is used to perform vacuum according to the control of vacuum degree control device
Cue that degree is not enough.
The technical scheme that the present embodiment is provided, is joined by obtaining brake signal parameter, engine state parameters and vacuum
Number, the number of times arrived when brake signal parameter acquiring be equal to or more than brake number of times threshold value, engine state parameters be in idling,
And when vacuum parameter is less than vacuum threshold value, controller produces vacuum degree deficiency cue, to point out driver to incite somebody to action
Clutch separation, then when driver steps on clutch, after clutch separation, the load of engine reduces, and the aperture of air throttle subtracts
Small, vacuum is recovered rapidly, to ensure good braking effect.
Above-mentioned vacuum degree control system may include the device that any embodiment of the present invention is provided, and can perform the present invention any
The method that embodiment is provided, possesses the corresponding functional module of execution method and beneficial effect.
Embodiment six
The present embodiment provides a kind of automobile, including the vacuum degree control system provided such as embodiment five, is stopped by acquisition
Car signal parameter, engine state parameters and vacuum parameter, when brake signal parameter acquiring to number of times be equal to or more than stop
Train number number threshold value, engine state parameters are in idling and when vacuum parameter is less than vacuum threshold value, and controller is produced
Raw vacuum degree deficiency cue, to point out driver by clutch separation, then when driver steps on clutch, clutch separation
Afterwards, the load of engine reduces, and the aperture of air throttle reduces, and vacuum is recovered rapidly, to ensure good braking effect.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead to
The related hardware of programmed instruction is crossed to complete.Foregoing program can be stored in a computer read/write memory medium.The journey
Sequence upon execution, performs the step of including above-mentioned each method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or
Person's CD etc. is various can be with the medium of store program codes.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of vacuum degree control method, it is characterised in that including：
Obtain brake signal parameter, engine state parameters and vacuum parameter；
When the number of times that brake signal parameter acquiring is arrived is equal to or more than brake number of times threshold value, engine state parameters in idle
Speed and when vacuum parameter be less than vacuum threshold value when, produce vacuum degree deficiency cue, to point out driver by clutch
Device is separated.
2. vacuum degree control method according to claim 1, it is characterised in that produce vacuum degree deficiency cue it
Afterwards, also include：
Obtain clutched state parameter；
When clutch state parameter remains as engagement state in Preset Time, air throttle is opened to greatest extent in control.
3. vacuum degree control method according to claim 2, it is characterised in that the vacuum threshold value is 20kPa.
4. vacuum degree control method according to claim 3, it is characterised in that the brake number of times threshold value is three times.
5. vacuum degree control method according to claim 4, it is characterised in that the Preset Time is 2 seconds.
6. the vacuum degree control method according to claim any one of 1-5, it is characterised in that the vacuum degree deficiency prompting
Signal includes：Audio, light or picture display signal.
7. a kind of vacuum degree control device, it is characterised in that including：
Parameter acquisition module, for obtaining brake signal parameter, engine state parameters and vacuum parameter；
Signal generator module, for when brake signal parameter acquiring to number of times be equal to or more than brake number of times threshold value, start
Machine state parameter is in idling and when vacuum parameter is less than vacuum threshold value, produces vacuum degree deficiency cue, with
Driver is indicated by clutch separation.
8. vacuum degree control device according to claim 7, it is characterised in that
The parameter acquisition module, is additionally operable to after vacuum degree deficiency cue is produced, and obtains clutched state ginseng
Number；
Described device also includes：
Throttle control module, for when clutch state parameter remains as engagement state in Preset Time, control will section
Valve is opened to greatest extent.
9. a kind of vacuum degree control system, it is characterised in that including：
Controller, including vacuum degree control device as claimed in claim 7 or 8；
Execution equipment, vacuum degree deficiency cue is performed for the control according to vacuum degree control device.
10. a kind of automobile, it is characterised in that including vacuum degree control system as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710005290.2A CN106812609A (en) | 2017-01-04 | 2017-01-04 | vacuum degree control method, device, system and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710005290.2A CN106812609A (en) | 2017-01-04 | 2017-01-04 | vacuum degree control method, device, system and automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106812609A true CN106812609A (en) | 2017-06-09 |
Family
ID=59109347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710005290.2A Pending CN106812609A (en) | 2017-01-04 | 2017-01-04 | vacuum degree control method, device, system and automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106812609A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107458368A (en) * | 2017-07-26 | 2017-12-12 | 北京汽车股份有限公司 | Control method, system and the vehicle of vehicle |
| CN111645664A (en) * | 2020-04-30 | 2020-09-11 | 湖南智点智能新能源汽车有限公司 | Electric vehicle fault analysis method, device and equipment and vehicle |
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| JP2006077653A (en) * | 2004-09-08 | 2006-03-23 | Toyota Motor Corp | Intake control device for internal combustion engine |
| JP2010038051A (en) * | 2008-08-06 | 2010-02-18 | Denso Corp | Torque control device for onboard power generator |
| CN103895636A (en) * | 2013-12-19 | 2014-07-02 | 上海汽车集团股份有限公司 | Method for controlling vacuum degree of automobile brake boosting system |
| CN104442773A (en) * | 2013-09-24 | 2015-03-25 | 广州汽车集团股份有限公司 | Method and system for matching and adjusting vacuum degree of vacuum booster of vehicle |
| US20160159357A1 (en) * | 2014-12-03 | 2016-06-09 | Ford Global Technologies, Llc | System and method for generating vacuum via an engine |
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2017
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| JP2006077653A (en) * | 2004-09-08 | 2006-03-23 | Toyota Motor Corp | Intake control device for internal combustion engine |
| JP2010038051A (en) * | 2008-08-06 | 2010-02-18 | Denso Corp | Torque control device for onboard power generator |
| CN104442773A (en) * | 2013-09-24 | 2015-03-25 | 广州汽车集团股份有限公司 | Method and system for matching and adjusting vacuum degree of vacuum booster of vehicle |
| CN103895636A (en) * | 2013-12-19 | 2014-07-02 | 上海汽车集团股份有限公司 | Method for controlling vacuum degree of automobile brake boosting system |
| US20160159357A1 (en) * | 2014-12-03 | 2016-06-09 | Ford Global Technologies, Llc | System and method for generating vacuum via an engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107458368A (en) * | 2017-07-26 | 2017-12-12 | 北京汽车股份有限公司 | Control method, system and the vehicle of vehicle |
| CN111645664A (en) * | 2020-04-30 | 2020-09-11 | 湖南智点智能新能源汽车有限公司 | Electric vehicle fault analysis method, device and equipment and vehicle |
| CN111645664B (en) * | 2020-04-30 | 2021-10-22 | 湖南智点智能新能源汽车有限公司 | Electric vehicle fault analysis method, device and equipment and vehicle |
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