CN106080565A - The control method of a kind of pure electric vehicle vacuum boost system and device - Google Patents
The control method of a kind of pure electric vehicle vacuum boost system and device Download PDFInfo
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- CN106080565A CN106080565A CN201610528414.0A CN201610528414A CN106080565A CN 106080565 A CN106080565 A CN 106080565A CN 201610528414 A CN201610528414 A CN 201610528414A CN 106080565 A CN106080565 A CN 106080565A
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- force value
- value
- vacuum
- threshold value
- booster
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Classifications
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- 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
-
- 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
- B60T2201/00—Particular use of vehicle brake systems; Special systems using also the brakes; Special software modules within the brake system controller
- B60T2201/03—Brake assistants
-
- 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
- B60T2210/00—Detection or estimation of road or environment conditions; Detection or estimation of road shapes
- B60T2210/30—Environment conditions or position therewithin
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Braking Systems And Boosters (AREA)
Abstract
The invention provides control method and the device of a kind of electric automobile vacuum boost system, described method reads the first force value gathered by barometric pressure sensor according to the default cycle, the second force value in described vacuum boost system is read according to the default cycle, judge whether described second force value is more than the startup threshold value of described vacuum boost system intermediate pump, when described second force value is more than described startup threshold value, control described vacuum pump to start, for described booster extracting vacuum.Can be seen that, owing to the startup threshold value of vacuum pump is to arrange according to the atmospheric pressure value of external environment, therefore, when external environment atmospheric pressure in highlands reduces, the startup threshold value of vacuum pump also decreases, and after vacuum pump starts, can ensure that vacuum boost system provides enough power-assisted for brake system in booster with the pressure reduction of external environment, stop in time when driver brakes and stop automobile, and then improve people's traffic safety in high altitude localities.
Description
Technical field
The present invention relates to electric vehicle engineering field, particularly relate to the control method of a kind of pure electric vehicle vacuum boost system
And device.
Background technology
Along with development and people's raising day by day to environmental consciousness of new-energy automobile technology, people are more and more blueer or green
Look at use pure electric automobile as trip instrument.
In pure electric automobile, vacuum boost system is the ingredient that it is important.In vacuum boost system, vacuum pump and
Booster is connected, vacuum pump be booster extracting vacuum, and booster produces sufficiently large with external environment under vacuum conditions
Pressure reduction, when driver brakes, provide power-assisted to make vehicle to stop in time to stop for brake system, and then ensure the row of driver
Car safety.
But, in high altitude localities, due to rarefaction of air, atmospheric pressure is relatively low so that pure electric automobile is on High aititude ground
When district travels, the pressure reduction between force value and the force value of external environment in booster is not enough, when driver brakes, and vacuum
Force aid system cannot provide enough power-assisted for brake system, causes braking distance long, and then to people in high altitude localities
The trip using pure electric automobile causes potential safety hazard.
Summary of the invention
In view of this, the invention provides control method and the device of a kind of pure electric vehicle vacuum boost system so that pure
Electric automobile vacuum boost system can realize the effect of auxiliary braking in high altitude localities, and then improves the driving peace of people
Entirely.
To achieve these goals, the technical scheme that the embodiment of the present invention provides is as follows:
The invention provides the control method of a kind of pure electric vehicle vacuum boost system, including:
Read the first force value gathered by barometric pressure sensor according to the default cycle, described first force value is outward
The atmospheric pressure value of boundary's environment；
Reading the second force value in described vacuum boost system according to the default cycle, described second force value is described
Atmospheric pressure value in booster in vacuum boost system；
Judge whether described second force value is more than the startup threshold value of described vacuum boost system intermediate pump, described startup
Threshold value is the threshold value that described first force value after using the first preset percentage computing is arranged；
When described second force value is more than described startup threshold value, controls described vacuum pump and start, take out for described booster
Take vacuum.
Preferably, also include:
Judge whether described second force value is less than the outage threshold of described vacuum boost system intermediate pump, described stopping
Threshold value is the threshold value that described first force value after using the second preset percentage computing is arranged.
Preferably, it is judged that whether described second force value is more than the startup threshold value bag of described vacuum boost system intermediate pump
Include:
Judge that described booster is the most in running order；
If described booster is in off working state, then judge that whether described second force value is more than described startup threshold value；
Preferably, also include:
If described booster is in running order, then judge whether described second force value is less than described outage threshold, if
It is out of service whether described second force value then controls described vacuum pump less than described outage threshold.
Preferably, also include:
Monitor the running status of described vacuum pump, when described vacuum pump breaks down, send caution signals to dress of reporting to the police
Put.
Another aspect of the present invention provides the control device of a kind of pure electric vehicle vacuum boost system, including:
First harvester, for reading the first force value gathered by barometric pressure sensor according to the default cycle,
Described first force value is the atmospheric pressure value of external environment；
Second harvester, for reading the second force value in described vacuum boost system, institute according to the default cycle
Stating the second force value is the atmospheric pressure value in booster in described vacuum boost system；
First judgment means, for judging that whether described second force value is more than described vacuum boost system intermediate pump
Starting threshold value, described startup threshold value is the threshold value that described first force value after using the first preset percentage computing is arranged；
Control device, for when described second force value is more than described startup threshold value, controls described vacuum pump and start, for
Described booster extracting vacuum.
Preferably, also include:
Second judgment means, for judging that whether described second force value is less than described vacuum boost system intermediate pump
Outage threshold, described outage threshold is the threshold value that described first force value after using the second preset percentage computing is arranged.
Preferably, described first judgment means includes:
First judging unit, is used for judging that described booster is the most in running order；
If described booster is in off working state, then judge that whether described second force value is more than described startup threshold value；
Preferably, also include:
Second judging unit, if in running order for described booster, then judges that described second force value is the least
In described outage threshold, if whether described second force value is less than described outage threshold, control described vacuum pump out of service.
Preferably, also include:
Detection module, for monitoring the running status of described vacuum pump, when described vacuum pump breaks down, sends warning
Signal is to alarm device.
The invention provides control method and the device of a kind of electric automobile vacuum boost system, described method is according to presetting
Cycle read the first force value of being gathered by barometric pressure sensor, described first force value is the atmospheric pressure of external environment
Value；Reading the second force value in described vacuum boost system according to the default cycle, described second force value is described vacuum
Atmospheric pressure value in booster in force aid system；Judge that whether described second force value is more than described vacuum boost system intermediate pump
Startup threshold value, described startup threshold value is the threshold value using described first force value after the first preset percentage computing to arrange；
When described second force value is more than described startup threshold value, controls described vacuum pump and start, for described booster extracting vacuum.Can
To find out, owing to the startup threshold value of vacuum pump is to arrange according to the atmospheric pressure value of external environment, therefore, in highlands
External environment atmospheric pressure reduce time, the startup threshold value of vacuum pump also decreases, vacuum pump start after, in booster
Force value also reduces so that the force value in booster can ensure that vacuum boost system with the pressure reduction of the force value of external environment
There is provided enough power-assisteds for brake system, can stop in time when driver brakes and stop automobile, and then improve people at High aititude
The traffic safety in area.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to
The accompanying drawing provided obtains other accompanying drawing.
Fig. 1 is the flow chart of the control method of a kind of electric automobile vacuum boost system disclosed in the embodiment of the present invention；
Fig. 2 is the another kind of flow process of the control method of a kind of electric automobile vacuum boost system disclosed in the embodiment of the present invention
Figure；
Fig. 3 is the structural representation controlling device of a kind of electric automobile vacuum boost system disclosed in the embodiment of the present invention
Figure；
Fig. 4 be a kind of electric automobile vacuum boost system disclosed in the embodiment of the present invention control device actually used in
Structural representation.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
The embodiment of the invention discloses the control method of a kind of electric automobile vacuum boost system, described control method is permissible
When making driver drive pure electric automobile in highlands, according to the external environment atmospheric pressure change of highlands, vacuum pump
Startup threshold value change the most therewith, vacuum pump start after, the force value in booster also changes so that the pressure in booster
The pressure reduction of the force value of value and external environment can ensure that vacuum boost system provides enough power-assisted, Ke Yi for brake system
Stop in time when driver brakes and stop automobile, and then improve people's traffic safety in high altitude localities.
Fig. 1 is the flow chart of the control method of a kind of electric automobile vacuum boost system disclosed in the embodiment of the present invention；
Shown in Figure 1, the control method of a kind of pure electric vehicle vacuum boost system that the present invention provides, including:
S101, the first force value gathered by barometric pressure sensor according to default cycle reading, described first pressure
Value is the atmospheric pressure value of external environment；
S102, read the second force value in described vacuum boost system, described second force value according to default cycle
For the atmospheric pressure value in booster in described vacuum boost system；
In the embodiment of the present invention, the cycle preset is preferably 100ms.In the embodiment of the present invention, every 100ms reads an order
One force value and the second force value.
Wherein, the first force value is the atmospheric pressure value of external environment.In the embodiment of the present invention, barometric pressure sensor is
It is used for gathering the first force value, is independently mounted in actual use on vehicle body, monitor the atmospheric pressure of external environment in real time
Value.
It should be noted that what barometric pressure sensor collected is the pressure signal of external environment, and by external environment
Pressure signal be converted into the signal of telecommunication after be sent in automobile controller bus CAN, by entire car controller ECU or other vehicle body
Controller reads this signal of telecommunication, obtains the first force value after then resolving the signal of telecommunication.Barometric pressure sensor can be adopted in real time
Collection is to the change of ambient pressure environment value, and is sent to entire car controller.
In the embodiment of the present invention, the second force value in vacuum boost system be by with the Vacuum Pressure in vacuum boost system
Force transducer is gathered, and vacuum pressure sensor is connected with booster, the atmospheric pressure value in Real-time Collection booster.Collect
After second force value, it is sent in entire car controller.Entire car controller reads the second pressure gathered by vacuum pressure sensor
Value.
S103, judge that described second force value is whether more than the startup threshold value of described vacuum boost system intermediate pump, institute
State and start the threshold value that threshold value is the described first force value setting after using the first preset percentage computing；
In the embodiment of the present invention, the startup threshold value in vacuum pump is to have a default startup threshold value, and what this preset
Starting the threshold value that threshold value is typically to arrange in plains region, therefore, when highlands, this threshold value is not act as under normal circumstances
?.In the embodiment of the present invention, the startup threshold value of vacuum pump is set to the 50% of ambient pressure environment value, namely vacuum pump
Startup threshold value in real time the most corresponding with the force value of external environment.
In the embodiment of the present invention, after entire car controller reads the first force value and the second force value according to the default cycle,
Compare the 50% of the startup threshold value of vacuum pump namely the first force value with the second force value, it is judged that described second pressure
Whether value is more than the startup threshold value of described vacuum boost system intermediate pump.
S104, when described second force value more than described startup threshold value time, control described vacuum pump start, for described power-assisted
Device extracting vacuum.
In the embodiment of the present invention, if the second force value is more than starting threshold value, say, that bright ambient pressure environment value
50% less than or equal to the atmospheric pressure value in booster, now the atmospheric pressure value of the booster in vacuum boost system and external environment
The pressure differential of force value less than or equal to the 50% of ambient pressure environment value, now, power-assisted that booster is provided is not enough
Brake with auxiliary brake system.Accordingly, it would be desirable to booster to be carried out the operation of extracting vacuum.
The atmospheric pressure value that the effect of extracting vacuum is so that in booster reduces so that the atmospheric pressure value in booster and extraneous ring
The difference of the force value in border makes vacuum boost system that brake system can play the effect of auxiliary brake.
The invention provides the control method of a kind of electric automobile vacuum boost system, described method is according to the default cycle
Reading the first force value gathered by barometric pressure sensor, described first force value is the atmospheric pressure value of external environment；Press
Reading the second force value in described vacuum boost system according to the default cycle, described second force value is described vacuum servo system
Atmospheric pressure value in booster in system；Judge whether described second force value is more than the startup of described vacuum boost system intermediate pump
Threshold value, described startup threshold value is the threshold value that described first force value after using the first preset percentage computing is arranged；When described
When second force value is more than described startup threshold value, controls described vacuum pump and start, for described booster extracting vacuum.Can see
Go out, owing to the startup threshold value of vacuum pump is to arrange according to the atmospheric pressure value of external environment, therefore, outside highlands
When boundary's environment atmospheric pressure reduces, the startup threshold value of vacuum pump also decreases, after vacuum pump starts, and the pressure in booster
Value also reduces so that with the pressure reduction of the force value of external environment, the force value in booster can ensure that vacuum boost system is for stopping
Car system provides enough power-assisteds, can stop in time when driver brakes and stop automobile, and then improves people in high altitude localities
Traffic safety.
Fig. 2 is the another kind of flow process of the control method of a kind of electric automobile vacuum boost system disclosed in the embodiment of the present invention
Figure.
Shown in Figure 2, the control method of a kind of pure electric vehicle vacuum boost system that the present invention provides, including:
S201, the first force value gathered by barometric pressure sensor according to default cycle reading, described first pressure
Value is the atmospheric pressure value of external environment；
S202, read the second force value in described vacuum boost system, described second force value according to default cycle
For the atmospheric pressure value in booster in described vacuum boost system；
S203, judge that described second force value is whether more than the startup threshold value of described vacuum boost system intermediate pump, institute
State and start the threshold value that threshold value is the described first force value setting after using the first preset percentage computing；
S204, when described second force value more than described startup threshold value time, control described vacuum pump start, for described power-assisted
Device extracting vacuum；
Above-mentioned steps S201 is identical to step S104 with step S101 to step S204, does not repeats them here.
S205, judge that described second force value is whether less than the outage threshold of described vacuum boost system intermediate pump, institute
Stating outage threshold is the threshold value that described first force value after using the second preset percentage computing is arranged.
In the embodiment of the present invention, in addition to setting the unlatching threshold value of vacuum pump, in addition it is also necessary to the outage threshold of vacuum pump is set.
The atmospheric pressure value that the purpose of outage threshold is so that in booster is set and arrives certain ratio with the difference of the force value of external environment
During example, stop the operation of extracting vacuum, save person for driving a car and manually stop the operation of vacuum pump.
Concrete, outage threshold is set to the 30% of external environment.It is to say, the force value in booster is at extraneous ring
Border force value 50% time vacuum pump startup optimization, when the 30% of extraneous ambient value, vacuum pump is out of service so that help
Atmospheric pressure value in power device and the force value of external environment remain between 50% to the 70% of ambient pressure environment value, thus
Ensure that the power-assisted that vacuum boost system provides can play the power-assisted effect to brake system.Solve driver in highlands
Drive pure electric automobile time, due to external environment change and power-assisted is not enough, long problem of braking.
Further, it is that the force value according to external environment is configured in real time owing to starting threshold value and outage threshold, therefore,
When driver travels to plains region from highlands, or when the area such as basin terrain that height above sea level is lower, power-assisted
The change that atmospheric pressure value in device is also proportional to the force value of external environment, and then ensure that the vacuum booster of pure electric automobile exists
The power-assisted effect to brake system is can act as under various environment.
Preferably, it is judged that whether described second force value is more than the startup threshold value bag of described vacuum boost system intermediate pump
Include:
Judge that described booster is the most in running order；
If described booster is in off working state, then judge that whether described second force value is more than described startup threshold value；
In embodiments of the present invention, also before judging the startup threshold value whether the second force value is more than vacuum pump, to helping
The duty of power device current time judges, only when booster is in off working state, just judges the second force value
Whether more than starting threshold value.
If described booster is in off working state, then judge that whether described second force value is more than described startup threshold value.
Perform step S203 to S205 below.
If described booster is in running order, then judge whether described second force value is less than described outage threshold, if
It is out of service whether described second force value then controls described vacuum pump less than described outage threshold.
Preferably, also include:
Monitor the running status of described vacuum pump, when described vacuum pump breaks down, send caution signals to dress of reporting to the police
Put.
In the embodiment of the present invention, also the running status of vacuum pump is monitored.In actually used, vacuum pump exist many
Planting pipeline, when a certain pipeline breaks down such as gas leakage or blocking, vacuum pump there will be fault.Now, fault-signal is monitored
Time, caution signals can be sent to alarm device, such as liquid crystal indicator or alarm etc., point out driver's vacuum pump to occur
Fault.
Fig. 3 is the control apparatus structure schematic diagram of a kind of pure electric vehicle vacuum boost system that the embodiment of the present invention provides.
Shown in Figure 3, the control device of a kind of pure electric vehicle vacuum boost system that the present invention provides includes:
First harvester 301, for reading the first pressure gathered by barometric pressure sensor according to the default cycle
Value, described first force value is the atmospheric pressure value of external environment；
Second harvester 302, for reading the second force value in described vacuum boost system according to the default cycle,
Described second force value is the atmospheric pressure value in booster in described vacuum boost system；
First judgment means 303, is used for judging that whether described second force value is more than vacuum in described vacuum boost system
The startup threshold value of pump, described startup threshold value is the threshold that described first force value after using the first preset percentage computing is arranged
Value；
Control device 304, for when described second force value is more than described startup threshold value, controlling described vacuum pump and open
Dynamic, for described booster extracting vacuum.
Preferably, also include:
Second judgment means, for judging that whether described second force value is less than described vacuum boost system intermediate pump
Outage threshold, described outage threshold is the threshold value that described first force value after using the second preset percentage computing is arranged.
Preferably, described first judgment means includes:
First judging unit, is used for judging that described booster is the most in running order；
If described booster is in off working state, then judge that whether described second force value is more than described startup threshold value.
Preferably, also include:
Second judging unit, if in running order for described booster, then judges that described second force value is the least
In described outage threshold, if whether described second force value is less than described outage threshold, control described vacuum pump out of service.
Preferably, also include:
Detection module, for monitoring the running status of described vacuum pump, when described vacuum pump breaks down, sends warning
Signal is to alarm device.
It should be noted that the control device of a kind of pure electric vehicle vacuum boost system of the present embodiment can use above-mentioned
The control method of a kind of pure electric vehicle vacuum boost system in embodiment of the method is complete for realize in said method embodiment
Portion's technical scheme, the function of its modules can implement according to the method in said method embodiment, and it implements
Process can refer to the associated description in above-described embodiment, and here is omitted.
Fig. 4 be a kind of electric automobile vacuum boost system disclosed in the embodiment of the present invention control device actually used in
Structural representation.
Seeing Fig. 4, the present invention in actual use, mainly has electric vacuum pump 1, relay 2, full-vehicle control unit 3, true
Pneumatics force transducer 4, barometric pressure sensor 5, booster 6, brake pedal unit 7,12V accumulator 8.Wherein, full-vehicle control
Device unit 3 includes above-mentioned control device.
Vacuum pump (EVP) 1: according to demand and the command action of system, produce vacuum for booster.
Booster 6: in the environment of vacuum, provides amplification for brake pedal force, and mounted thereon have vacuum to pass
Sensor, provides for vacuum signal for full-vehicle control unit.
Relay 2: the control signal sent according to entire car controller carrys out the power circuit of on or off vacuum pump.
Accumulator 8: the operation for vacuum pump provides energy.
Full-vehicle control unit 3: gather the first force value and the second force value, calculates according to controlling logic and judges,
Arranging startup threshold value and the outage threshold of vacuum pump, the work to vacuum pump is monitored, carry out when thrashing warning and
Diagnosis.(other ECU on car or functional module can also be used to be controlled).
Vacuum pressure sensor 4: be arranged on booster, monitors the change of booster inner vacuum angle value in real time.
Barometric pressure sensor 5: be arranged separately on vehicle body, monitors the change of external environment atmospheric pressure in real time.
Brake pedal unit 7: the manipulation device of automobile brake, driver is braked by brake pedal.
The invention provides the control device of a kind of electric automobile vacuum boost system, described device is according to the default cycle
Read the first force value of being gathered by barometric pressure sensor, read the in described vacuum boost system according to the default cycle
Two force value, it is judged that whether described second force value is more than the startup threshold value of described vacuum boost system intermediate pump, when described
When second force value is more than described startup threshold value, controls described vacuum pump and start, for described booster extracting vacuum.Can see
Go out, owing to the startup threshold value of vacuum pump is to arrange according to the atmospheric pressure value of external environment, therefore, outside highlands
When boundary's environment atmospheric pressure reduces, the startup threshold value of vacuum pump also decreases, after vacuum pump starts, with the external world in booster
The pressure reduction of environment can ensure that vacuum boost system provides enough power-assisted for brake system, stops in time when driver brakes and stops
Automobile, and then improve people's traffic safety in high altitude localities.
It should be noted that each embodiment in this specification all uses the mode gone forward one by one to describe, each embodiment weight
Point explanation is all the difference with other embodiments, and between each embodiment, identical similar part sees mutually.
For device class embodiment, due to itself and embodiment of the method basic simlarity, so describe is fairly simple, relevant part ginseng
See that the part of embodiment of the method illustrates.
Finally, in addition it is also necessary to explanation, in this article, the relational terms of such as first and second or the like be used merely to by
One entity or operation separate with another entity or operating space, and not necessarily require or imply these entities or operation
Between exist any this reality relation or order.And, term " includes ", " comprising " or its any other variant meaning
Containing comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include that
A little key elements, but also include other key elements being not expressly set out, or also include for this process, method, article or
The key element that equipment is intrinsic.In the case of there is no more restriction, statement " including ... " key element limited, do not arrange
Except there is also other identical element in including the process of described key element, method, article or equipment.
For convenience of description, it is divided into various unit to be respectively described with function when describing apparatus above.Certainly, this is being implemented
The function of each unit can be realized in same or multiple softwares and/or hardware during application.
As seen through the above description of the embodiments, those skilled in the art it can be understood that to the application can
The mode adding required general hardware platform by software realizes.Based on such understanding, the technical scheme essence of the application
On the part that in other words prior art contributed can embody with the form of software product, this computer software product
Can be stored in storage medium, such as ROM/RAM, magnetic disc, CD etc., including some instructions with so that a computer equipment
(can be personal computer, server, or the network equipment etc.) performs some of each embodiment of the application or embodiment
Method described in part.
Above a kind of multi-point path analysis method and system provided herein are described in detail, herein
Applying specific case to be set forth principle and the embodiment of the application, the explanation of above example is only intended to help
Understand the present processes and core concept thereof；Simultaneously for one of ordinary skill in the art, according to the thought of the application,
The most all will change, in sum, this specification content should not be construed as this
The restriction of application.
Claims (10)
1. the control method of a pure electric vehicle vacuum boost system, it is characterised in that including:
Read the first force value gathered by barometric pressure sensor according to the default cycle, described first force value is extraneous ring
The atmospheric pressure value in border；
Reading the second force value in described vacuum boost system according to the default cycle, described second force value is described vacuum
Atmospheric pressure value in booster in force aid system；
Judge whether described second force value is more than the startup threshold value of described vacuum boost system intermediate pump, described startup threshold value
The threshold value arranged for described first force value after using the first preset percentage computing；
When described second force value is more than described startup threshold value, controls described vacuum pump and start, true for the extraction of described booster
Empty.
Control method the most according to claim 1, it is characterised in that also include:
Judge whether described second force value is less than the outage threshold of described vacuum boost system intermediate pump, described outage threshold
The threshold value arranged for described first force value after using the second preset percentage computing.
Control method the most according to claim 2, it is characterised in that judge described second force value whether more than described very
The startup threshold value of empty force aid system intermediate pump includes:
Judge that described booster is the most in running order；
If described booster is in off working state, then judge that whether described second force value is more than described startup threshold value.
Control method the most according to claim 3, it is characterised in that also include:
If described booster is in running order, then judge whether described second force value is less than described outage threshold, if described
It is out of service whether the second force value then controls described vacuum pump less than described outage threshold.
5., according to the control method described in Claims 1-4 any one, also include:
Monitor the running status of described vacuum pump, when described vacuum pump breaks down, send caution signals to alarm device.
6. the control device of a pure electric vehicle vacuum boost system, it is characterised in that including:
First harvester, for reading the first force value gathered by barometric pressure sensor according to the default cycle, described
First force value is the atmospheric pressure value of external environment；
Second harvester, for reading the second force value in described vacuum boost system according to default cycle, described the
Two force value are the atmospheric pressure value in described vacuum boost system in booster；
First judgment means, for judging whether described second force value is more than the startup of described vacuum boost system intermediate pump
Threshold value, described startup threshold value is the threshold value that described first force value after using the first preset percentage computing is arranged；
Control device, for when described second force value is more than described startup threshold value, controls described vacuum pump and start, for described
Booster extracting vacuum.
Control device the most according to claim 6, it is characterised in that also include:
Second judgment means, for judging whether described second force value is less than the stopping of described vacuum boost system intermediate pump
Threshold value, described outage threshold is the threshold value that described first force value after using the second preset percentage computing is arranged.
Control device the most according to claim 7, it is characterised in that described first judgment means includes:
First judging unit, is used for judging that described booster is the most in running order；
If described booster is in off working state, then judge that whether described second force value is more than described startup threshold value.
Control device the most according to claim 8, it is characterised in that also include:
Second judging unit, if in running order for described booster, then judges that whether described second force value is less than institute
State outage threshold, if whether described second force value is less than described outage threshold, control described vacuum pump out of service.
10., according to the control method described in claim 6 to 9 any one, also include:
Detection module, for monitoring the running status of described vacuum pump, when described vacuum pump breaks down, sends caution signals
To alarm device.
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| CN106740781A (en) * | 2017-01-18 | 2017-05-31 | 安徽江淮汽车集团股份有限公司 | A kind of control system and method for vacuum automobile power-assisted |
| CN109501789A (en) * | 2018-12-05 | 2019-03-22 | 北京长城华冠汽车技术开发有限公司 | Vacuum method for controlling pump and controller, vacuum pump failure detection system |
| CN109878485A (en) * | 2019-04-03 | 2019-06-14 | 厦门金龙联合汽车工业有限公司 | Electric car service brake force aid system and its control strategy and method for diagnosing faults |
| CN110588619A (en) * | 2019-09-04 | 2019-12-20 | 东风航盛（武汉）汽车控制系统有限公司 | Control method of electric automobile vacuum pump in plateau environment |
| CN112896129A (en) * | 2020-05-07 | 2021-06-04 | 重庆长安汽车股份有限公司 | Control method for electronic vacuum pump of pure electric vehicle |
| CN113246946A (en) * | 2021-05-30 | 2021-08-13 | 重庆长安汽车股份有限公司 | Electronic vacuum pump system fault processing method |
| CN113335250A (en) * | 2019-12-11 | 2021-09-03 | 株式会社韩中Ncs | Vacuum pressure control method of vehicle vacuum booster based on height |
| CN114407862A (en) * | 2022-02-18 | 2022-04-29 | 奇瑞商用车（安徽）有限公司 | Vacuum pump control method controlled by VCU |
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| CN113335250A (en) * | 2019-12-11 | 2021-09-03 | 株式会社韩中Ncs | Vacuum pressure control method of vehicle vacuum booster based on height |
| CN112896129A (en) * | 2020-05-07 | 2021-06-04 | 重庆长安汽车股份有限公司 | Control method for electronic vacuum pump of pure electric vehicle |
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| CN113246946A (en) * | 2021-05-30 | 2021-08-13 | 重庆长安汽车股份有限公司 | Electronic vacuum pump system fault processing method |
| CN113246946B (en) * | 2021-05-30 | 2022-07-08 | 重庆长安汽车股份有限公司 | Electronic vacuum pump system fault processing method |
| CN114407862A (en) * | 2022-02-18 | 2022-04-29 | 奇瑞商用车（安徽）有限公司 | Vacuum pump control method controlled by VCU |
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