CN104828050B - The control method of auto electronic vavuum pump and the controlled vehicle-mounted electrical unit for realizing this method - Google Patents
The control method of auto electronic vavuum pump and the controlled vehicle-mounted electrical unit for realizing this method Download PDFInfo
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- CN104828050B CN104828050B CN201410049038.8A CN201410049038A CN104828050B CN 104828050 B CN104828050 B CN 104828050B CN 201410049038 A CN201410049038 A CN 201410049038A CN 104828050 B CN104828050 B CN 104828050B
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- threshold value
- sea level
- height above
- above sea
- control
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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
- 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
Abstract
The present invention relates to braking technology, the more particularly to control method of auto electronic vavuum pump and the controlled vehicle-mounted electrical unit for realizing this method.Control method according to the auto electronic vavuum pump of one embodiment of the invention comprises the following steps：Obtain the vacuum levels in vacuum booster；The vacuum levels and control threshold are compared to determine to the open/close states residing for electronic vacuum pump；And be in the electronic vacuum pump according to result of the comparison and be turned on and off state, wherein, enter Mobile state adjustment to the control threshold according to the height above sea level that vehicle is presently in, wherein, when the height above sea level is higher, the control threshold is smaller.
Description
Technical field
The present invention relates to braking technology, more particularly to the control method of auto electronic vavuum pump and the vehicle-mounted of this method is realized
ECU.
Background technology
The mode of controlled vehicle-mounted electrical unit control electronic vacuum pump generally comprises open loop mode and closed loop mode.In former mould
Under formula, keying of the controlled vehicle-mounted electrical unit for electronic vacuum pump is independent of the vacuum levels in vacuum booster.This mould
Formula, which has, realizes the advantages of simple, but control accuracy is poor.Under closed loop mode, controlled vehicle-mounted electrical unit senses according to vacuum
The measurement signal of device determines the open/close states of electronic vacuum pump.Specifically, the vacuum levels that controlled vehicle-mounted electrical unit will measure
Signal determines according to comparative result the open/close states of electronic vacuum pump compared with control threshold.But in the mould
Under formula, setting of the control accuracy for control threshold is very sensitive, if control threshold is set to too high, can cause vavuum pump
Open and close too late too early, also result in vavuum pump sometimes and often turn, so as to cause the electronic vacuum pump life-span substantially to shorten or even burn
Ruin；On the other hand, if control threshold be set to it is relatively low, may although the loss of electronic vacuum pump can be slowed down
Electronic vacuum pump is caused to open too late and close too early, even resulting in electronic vacuum pump can not open, so as to lose braking ability.
Therefore, there is an urgent need to a kind of control method of auto electronic vavuum pump, it can be avoided because being set to control threshold
Various problems caused by the high sensitivity of definite value.
The content of the invention
It is an object of the present invention to provide a kind of control method of auto electronic vavuum pump, and it can ensure braking
While energy, extend the service life of electronic vacuum pump.
Control method according to the auto electronic vavuum pump of one embodiment of the invention comprises the following steps：
Obtain the vacuum levels in vacuum booster；
The vacuum levels and control threshold are compared to determine to the open/close states residing for electronic vacuum pump；And
The electronic vacuum pump, which is in, according to result of the comparison is turned on and off state,
Wherein, Mobile state adjustment is entered to the control threshold according to the height above sea level that vehicle is presently in, wherein, when described
When height above sea level is higher, the control threshold is smaller.
Preferably, in the control method of above-mentioned auto electronic vavuum pump, believed using the measurement of ambient air pressure sensor
The height above sea level that number determination vehicle is presently in.
Preferably, in the control method of above-mentioned auto electronic vavuum pump, the control threshold includes opening threshold value and pass
Threshold value is closed, the unlatching threshold value is less than the closing threshold value and determines opening residing for the electronic vacuum pump according to following condition
Closed state：
If the vacuum levels are less than or equal to the unlatching threshold value, the electronic vacuum pump is opened；
If the vacuum levels are more than the closing threshold value, the electronic vacuum pump is closed；
If the vacuum levels are more than the unlatching threshold value but are less than or equal to the closing threshold value, make described
Electronic vacuum pump keeps original state.
Preferably, in the control method of above-mentioned auto electronic vavuum pump, zero height above sea level and the first height above sea level it
Between, the unlatching threshold value and closing threshold value are steady state value, between the first height above sea level and the second height above sea level, the unlatching threshold
Value and closing threshold value linearly reduce with the rise of height above sea level, described between the second height above sea level and the 3rd height above sea level
Opening threshold value, the closing threshold value linearly reduces with the rise of height above sea level for steady state value.
Preferably, in the control method of above-mentioned auto electronic vavuum pump, in the range of whole height above sea level, the closing
Threshold value is more than the preset value that a value is positive number with opening the difference of threshold value.
It is also an object of the present invention to provide a kind of controlled vehicle-mounted electrical unit, and it can ensure the same of braking ability
When, extend the service life of electronic vacuum pump.
According to one embodiment of the invention controlled vehicle-mounted electrical unit include input block, output unit and with the input
Unit and the control unit of output unit coupling, wherein, the input block is configured as receiving measurement signal, institute from sensor
State control unit to be configured as generating control command according to the measurement signal, the output unit is configured as to executing agency
The control command is exported, wherein, described control unit is further configured to generate the control command as follows：
It is true that the vacuum levels in vacuum booster that sensor is measured with control threshold are compared to determine electronics
Open/close states residing for empty pump；And
Control command of the electronic vacuum pump in the state that is turned on and off is made according to result of the comparison generation,
Wherein, described control unit is configured as carrying out the control threshold according to the height above sea level that vehicle is presently in
Dynamic adjusts, wherein when the height above sea level is higher, the control threshold is smaller.
The above embodiment of the present invention has following advantages：
（1）By the adjusting and optimizing to control logic and control parameter, the automatic performance of vehicle is set to be well adapted for
The area of different altitude height, had a wide range of applications in the big vehicle target market of height above sea level drop.
（2）Reach outstanding control effect using succinct control logic, and reduce energy consumption and noise, it is same with this
When extend the service life of electronic vacuum pump again.
Brief description of the drawings
From described further below with reference to accompanying drawing, it will make above and other objects of the present invention and advantage more complete
It is clear.
Fig. 1 is the schematic diagram according to the controlled vehicle-mounted electrical unit of one embodiment of the invention.
Fig. 2 is the flow chart according to the control method of the auto electronic vavuum pump of one embodiment of the invention.
Fig. 3 is the schematic diagram of the control threshold setting means for Fig. 1 and 2 illustrated embodiments, wherein, transverse axis is worked as vehicle
Preceding residing height above sea level, the longitudinal axis is control threshold.
Fig. 4 is the flow chart of the control command generation subprogram in embodiment illustrated in fig. 2.
Embodiment
The present invention is more fully illustrated referring to which illustrates the accompanying drawing of illustrative examples of the present invention.But this hair
It is bright to be realized by multi-form, and be not construed as being only limitted to each embodiment given herein.The above-mentioned each implementation provided
Example is intended to make this paper disclosure comprehensively complete, so that the understanding to the scope of the present invention is more fully and accurately.
The term of such as "comprising" and " comprising " etc is represented except direct with having in the specification and in the claims
Beyond the unit and step clearly stated, technical scheme is also not excluded for having its do not stated directly or clearly
The situation of its unit and step.
The term of such as " first " and " second " etc is not offered as order of the unit in time, space, size etc.
And it is only to make differentiation each unit to be used.
Embodiments of the invention are specifically described below by accompanying drawing.
Fig. 1 is the schematic diagram according to the controlled vehicle-mounted electrical unit of one embodiment of the invention.
As shown in figure 1, controlled vehicle-mounted electrical unit 10 includes input block 110, output unit 120 and control unit 130.
Various sensors of the input block 110 from vehicle receive measurement signal and are supplied to control unit 130.Sensor
Such as include but is not limited to vacuum sensor 21 and ambient air pressure sensor 22, it is respectively used in measurement of vacuum booster
Vacuum levels and vehicle be presently in the ambient air voltage levels of position.Control unit 130 and input block 110 and output
Unit 120 couples, and its measurement signal provided according to input block 110 generates control command and exported through output unit 120
To executing agency, control of the electronic control unit to vehicle running state is achieved in.
Referring to Fig. 1, control unit 130 includes I/O interfaces 131, central processing unit 132 and memory 133.Input block
110 measurement signals received can deliver to central processing unit 132 and memory 133 through I/O interfaces 131.On the other hand, central processing
The control instruction that device 132 generates can also be sent to output unit 120 through I/O interfaces.The storage control vehicle running state of memory 133
Required program and data.
In the present embodiment, control unit 130 is according to the ring received through input block 110 from ambient air pressure sensor 22
The measurement signal of border atmospheric pressure determines the height above sea level that vehicle is presently in, and and then determines that control electronics is true according to height above sea level
The control threshold of empty pump open/close states, for its mode to cause when height above sea level is higher, control threshold is smaller.Control threshold includes
Open threshold value and close threshold value, wherein, unlatching threshold value, which is less than, closes threshold value.
Then, the vacuum levels received through input block 110 from vacuum sensor 21 are measured letter by control unit 130
The open/close states residing for electronic vacuum pump number are compared to determine with control threshold.Preferably, control unit 130 is using following
Condition determines open/close states：
（1）If vacuum levels, which are less than or equal to, opens threshold value, electronic vacuum pump is opened；
（2）If vacuum levels, which are more than, closes threshold value, electronic vacuum pump is closed；
（3）Open threshold value if vacuum levels are more than but be less than or equal to close threshold value, protect electronic vacuum pump
It is constant to hold original state.
After control unit 130 generates control command, the control command is output to control relay through output unit 120
30 to drive electronic vacuum pump 40.
In this embodiment, it is preferred that control unit 130 can use height above sea level-control threshold relation shown in Fig. 3
To determine control threshold.Referring to Fig. 3, whole height above sea level scope（Such as 0-4500 rice）Some sections are divided into, wherein, zero
Between height above sea level and the first height above sea level A, threshold value TH1 is opened（It is shown in broken lines in figure）With closing threshold value TH2（With reality in figure
Line is shown）For steady state value；Between the first height above sea level A and the second height above sea level B, open threshold value TH1 and close threshold value TH2 with
The rise of height above sea level and linearly reduce；Between the second height above sea level B and the 3rd height above sea level C, unlatching threshold value is steady state value
And close threshold value and linearly reduce with the rise of height above sea level.
In above-mentioned control threshold setting means, make unlatching threshold value TH1 and close threshold value TH2 in zero height above sea level and height above sea level
Higher steady state value is kept to ensure that vehicle has preferable braking ability and pedal sense when compared with low altitude area between height A
Feel, while reduce control difficulty again.In addition, make unlatching threshold value TH1 between the first height above sea level A and the second height above sea level B
With close threshold value TH2 linearly reduce with the rise of height above sea level can reduce the unnecessary run time of electronic vacuum pump and time
Number, and in particular, linear reduction mode not only can effectively reduce the complexity of control, and also reduce
Dependence of the control effect to height above sea level A setting values.Finally, cause that opening threshold value keeps permanent after height above sea level is more than B
Surely the basic braking ability of vehicle can be ensured, because when unlatching threshold value is too small electronic vacuum pump will be caused to open too late, i.e.,
It can just be opened under extremely low vacuum, so as to have influence on traffic safety.
In this embodiment, it is preferred that in the range of whole height above sea level, it is ensured that close threshold value TH2 with opening threshold value TH1
Difference be more than the preset value that value is positive number.Therefore, threshold value can be closed in the second height above sea level B and the by adjusting
The slope in section between three height above sea level C realizes, or can be by turning off the minimum value of threshold value（Namely the 3rd
Closing threshold value at height above sea level C）Minimum value with opening threshold value（Namely the unlatching threshold value at the 3rd height above sea level C）Difference
Realized for above-mentioned preset value.
Fig. 2 is the flow chart according to the auto electronic vacuum method for controlling pump of one embodiment of the invention.Exemplarily, this
In assume to realize using the controlled vehicle-mounted electrical unit shown in Fig. 1, but from the following description it will recognize that, the present embodiment
Method is not rely on the controlled vehicle-mounted electrical unit of specific structure.
As shown in Fig. 2 in step s 201, control unit 130 is through input block 110 respectively from the He of vacuum sensor 21
Ambient air pressure sensor 22 receives vacuum levels measurement signal and ambient atmosphere pressure measurement signal.
Step S202 is subsequently entered, ambient atmosphere pressure measurement signal is scaled what vehicle was presently in by control unit 130
Height above sea level.
Subsequently enter step S203, the height above sea level setting control electricity that control unit 130 converts to obtain according to step S202
The control threshold of sub- vavuum pump open/close states, control threshold here include opening threshold value and close threshold value, its specific setting side
Formula has been described in detail above, and here is omitted.
Step S204 is subsequently entered, control unit 130 performs control command generation subprogram.In the subprogram, control
Unit 130 ties vacuum levels measurement signal compared with the control threshold set in step S203, and according to comparing
Fruit generates the control command on electronic vacuum pump open/close states.
Step S205 is then performed, control unit 130 exports through output unit 120 to the relay 30 as executing agency
The control command generated, so that relay 30 drives electronic vacuum pump 40, so as to realize the keying of electronic vacuum pump.
Fig. 4 is the flow chart of the control command generation subprogram in embodiment illustrated in fig. 2.
As shown in figure 4, in step S401, control unit 130 enters vacuum levels measurement signal with opening threshold value TH1
Row compares, if vacuum levels measurement signal, which is less than or equal to, opens threshold value, into step S402；Otherwise, then step is entered
Rapid S403.
In step S402, the control command of the generation unlatching electronic vacuum pump of control unit 130 and the step entered in Fig. 2
Rapid S205.
In step S403, control unit 130 by vacuum levels measurement signal compared with closing threshold value TH2, such as
Truly reciprocal of duty cycle horizontal survey signal, which is more than, closes threshold value, then into step S404；Otherwise, then into step S405.
In step s 404, the step that the generation of control unit 130 is closed the control command of electronic vacuum pump and entered in Fig. 2
Rapid S205.
In step S405, control unit 130 generates the control command for making electronic vacuum pump keep original open/close states simultaneously
And the step S205 entered in Fig. 2.
Although having showed and having discussed some aspects of the present invention, those skilled in the art should realize
Arrive：Above-mentioned aspect can be changed under conditions of without departing substantially from the principle of the invention and spirit, therefore the scope of the present invention will
Limited by claim and equivalent content.
Claims (6)
1. a kind of control method of auto electronic vavuum pump, comprises the following steps：
Obtain the vacuum levels in vacuum booster；
The vacuum levels and control threshold are compared to determine to the open/close states residing for electronic vacuum pump；And
The electronic vacuum pump, which is in, according to result of the comparison is turned on and off state,
Characterized in that, enter Mobile state adjustment to the control threshold according to the height above sea level that vehicle is presently in, wherein, work as institute
State height above sea level it is higher when, the control threshold is smaller,
Wherein, the control threshold include open threshold value and close threshold value, it is described unlatching threshold value be less than it is described closing threshold value and
The open/close states residing for the electronic vacuum pump are determined according to following condition：
If the vacuum levels are less than or equal to the unlatching threshold value, the electronic vacuum pump is opened；
If the vacuum levels are more than the closing threshold value, the electronic vacuum pump is closed；
If the vacuum levels are more than the unlatching threshold value but are less than or equal to the closing threshold value, make the electronics
Vavuum pump keeps original state,
Wherein, between zero height above sea level and the first height above sea level, the unlatching threshold value and closing threshold value are steady state value, first
Between height above sea level and the second height above sea level, the unlatching threshold value and closing threshold value linearly reduce with the rise of height above sea level,
Between the second height above sea level and the 3rd height above sea level, it is described unlatching threshold value be steady state value and it is described closing threshold value with height above sea level
Rise and linearly reduce.
2. the control method of auto electronic vavuum pump according to claim 1, wherein, utilize ambient air pressure sensor
Measurement signal determines the height above sea level that vehicle is presently in.
3. the control method of auto electronic vavuum pump according to claim 1, wherein, in the range of whole height above sea level,
The difference closed threshold value and open threshold value is more than the preset value that a value is positive number.
4. a kind of controlled vehicle-mounted electrical unit, including input block, output unit and coupled with the input block and output unit
Control unit, wherein, the input block is configured as receiving measurement signal from sensor, and described control unit is configured as
Control command is generated according to the measurement signal, the output unit is configured as exporting the control command to executing agency,
Wherein, described control unit is further configured to generate the control command as follows：
The vacuum levels in vacuum booster that sensor is measured are compared to determine electronic vacuum pump with control threshold
Residing open/close states；And
Control command of the electronic vacuum pump in the state that is turned on and off is made according to result of the comparison generation,
Characterized in that, described control unit is configured as entering the control threshold according to the height above sea level that vehicle is presently in
Mobile state adjusts, wherein when the height above sea level is higher, the control threshold is smaller,
Wherein, the control threshold include open threshold value and close threshold value, it is described unlatching threshold value be less than it is described closing threshold value and
Described control unit determines the open/close states residing for the electronic vacuum pump according to following condition：
If the vacuum levels are less than or equal to the unlatching threshold value, the electronic vacuum pump is opened；
If the vacuum levels are more than the closing threshold value, the electronic vacuum pump is closed；
If the vacuum levels are more than the unlatching threshold value but are less than or equal to the closing threshold value, make the electronics
Vavuum pump keeps original state,
Wherein, between zero height above sea level and the first height above sea level, the unlatching threshold value and closing threshold value are steady state value, first
Between height above sea level and the second height above sea level, the unlatching threshold value and closing threshold value linearly reduce with the rise of height above sea level,
Between the second height above sea level and the 3rd height above sea level, it is described unlatching threshold value be steady state value and it is described closing threshold value with height above sea level
Rise and linearly reduce.
5. controlled vehicle-mounted electrical unit according to claim 4, wherein, described control unit utilizes ambient air pressure sensor
Measurement signal determines height above sea level that vehicle is presently in.
6. controlled vehicle-mounted electrical unit according to claim 4, wherein, in the range of whole height above sea level, the closing threshold value
Difference with opening threshold value is more than the preset value that a value is positive number.
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| CN201410049038.8A CN104828050B (en) | 2014-02-12 | 2014-02-12 | The control method of auto electronic vavuum pump and the controlled vehicle-mounted electrical unit for realizing this method |
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| CN201410049038.8A CN104828050B (en) | 2014-02-12 | 2014-02-12 | The control method of auto electronic vavuum pump and the controlled vehicle-mounted electrical unit for realizing this method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105235669A (en) * | 2015-10-30 | 2016-01-13 | 北京新能源汽车股份有限公司 | Braking assistance control system, control method thereof and vehicle |
| CN105539409B (en) * | 2015-11-30 | 2018-07-17 | 北京新能源汽车股份有限公司 | The force aid system for braking of vehicle and vehicle with it |
| CN105966382B (en) * | 2016-05-03 | 2019-02-22 | 北京新能源汽车股份有限公司 | The height above sea level evaluation method and device of electric car and its local environment |
| CN106379303B (en) * | 2016-10-26 | 2019-04-09 | 浙江吉利控股集团有限公司 | A kind of Vehicular electric vacuum pump control system and its method |
| 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 |
| CN107933462B (en) * | 2017-11-20 | 2020-12-11 | 中车株洲电力机车有限公司 | Control method and device for auxiliary engine of vehicle |
| CN108773368A (en) * | 2018-04-24 | 2018-11-09 | 上海思致汽车工程技术有限公司 | A kind of auto electronic vacuum method for controlling pump automatically adjusted with height above sea level |
| CN110979288A (en) * | 2019-12-27 | 2020-04-10 | 郑州日产汽车有限公司 | Pure electric vehicle intelligent vacuum pump control system and method based on whole vehicle CAN architecture |
| CN113954800A (en) * | 2021-11-26 | 2022-01-21 | 南京工业大学 | Electric vacuum power-assisted braking system and method |
| CN114475549A (en) * | 2022-02-28 | 2022-05-13 | 东风小康汽车有限公司重庆分公司 | Control method, device and equipment for electronic vacuum pump of electric automobile and storage medium |
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