CN104842987B - The vacuum boost system and its pressure measurement method of electric vehicle - Google Patents
The vacuum boost system and its pressure measurement method of electric vehicle Download PDFInfo
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- CN104842987B CN104842987B CN201510185470.4A CN201510185470A CN104842987B CN 104842987 B CN104842987 B CN 104842987B CN 201510185470 A CN201510185470 A CN 201510185470A CN 104842987 B CN104842987 B CN 104842987B
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- pressure
- vacuum
- boost system
- absolute pressure
- absolute
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
-
- 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
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/88—Pressure measurement in brake systems
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
An embodiment of the present invention provides a kind of vacuum boost system of electric vehicle and its pressure measurement methods.The system includes mainly：Relative pressure sensor and absolute pressure transducer are set on vacuum booster, and the sensor signal of the relative pressure sensor and absolute pressure transducer is accessed by entire car controller by cable, the absolute pressure and external atmosphere pressure in the vacuum boost system are measured using the relative pressure sensor and absolute pressure transducer.The embodiment of the present invention on vacuum booster by being arranged relative pressure sensor and absolute pressure transducer, and sensor signal is accessed into entire car controller, the absolute pressure and external atmosphere pressure in the vacuum boost system of electric vehicle can accurately and efficiently be measured, by the Redundancy Design of dual sensor, the safe and reliable of the vacuum boost system of electric vehicle ensure that.
Description
Technical field
The present invention relates to electric vehicle engineering field more particularly to the vacuum boost systems and its pressure of a kind of electric vehicle
Measurement method.
Background technology
Pure electric automobile is the representative of new-energy automobile, since pure electric automobile does not have engine assembly to provide vacuum source,
Therefore it needs to increase a set of digital electric vacuum assistance system.
The safety of influence and vacuum boost system itself in view of atmospheric pressure to vacuum boost system, importance,
It needs effectively to measure external atmosphere pressure.In the prior art, there are no one kind accurately and efficiently measuring electric vehicle
Vacuum boost system in absolute pressure and external atmosphere pressure scheme.
Invention content
The embodiment provides a kind of vacuum boost system of electric vehicle and its pressure measurement methods, to realize
To in electric vehicle vacuum boost system absolute pressure and external atmosphere pressure effectively measured.
According to an aspect of the invention, there is provided a kind of vacuum boost system of electric vehicle, including：In vacuum servo
Relative pressure sensor and absolute pressure transducer be set on device, and by cable by the relative pressure sensor and absolute pressure
The sensor signal of force snesor accesses entire car controller, is obtained using the relative pressure sensor and absolute pressure transducer
Obtain the absolute pressure and external atmosphere pressure in the vacuum boost system.
Preferably, the relative pressure sensor, absolute pressure transducer pass through three cables and the vehicle control respectively
The ground wire port of device processed, low tension source, signal transmission port connection.
Preferably, the relative pressure sensor, absolute pressure transducer pass through mounting hole and the vacuum servo respectively
Device connects.
Preferably, the system further includes the vacuum tank and vacuum pump connected using vacuum tube, the vacuum tank
It is connect with the vacuum booster by vacuum tube.
Preferably, the vacuum pump is by the vehicle control unit controls and driving.
According to another aspect of the present invention, a kind of pressure measurement side of the vacuum boost system of electric vehicle is provided
Method is applied to the vacuum boost system of the electric vehicle, the method includes：
Obtain the pressure of the pressure and absolute pressure transducer output of the relative pressure sensor output；
Calculate the sum of the pressure of the relative pressure sensor output and the pressure of absolute pressure transducer output
Value regard described and value as external atmosphere pressure.
Preferably, the method further includes：Indicate that the vacuum helps with the pressure of absolute pressure transducer output
Absolute pressure in Force system.
Preferably, one of running parameter of the vacuum pump be the vacuum boost system in absolute pressure and the external world it is big
The ratio of air pressure.
Preferably, when the ratio of absolute pressure and external atmosphere pressure in the vacuum boost system is more than the first of setting
When threshold value, controls the vacuum pump and open work；When the ratio of absolute pressure and external atmosphere pressure in the vacuum boost system
When value is less than the second threshold set, stop the vacuum pump work.
The embodiment of the present invention passes through in vacuum servo it can be seen from the technical solution that embodiments of the invention described above provide
Relative pressure sensor and absolute pressure transducer are set on device, and sensor signal is accessed into entire car controller, can it is accurate,
It is effectively measuring go out electric vehicle vacuum boost system in absolute pressure and external atmosphere pressure, pass through the redundancy of dual sensor
Design, ensure that the safe and reliable of the vacuum boost system of electric vehicle.
The additional aspect of the present invention and advantage will be set forth in part in the description, these will become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill of field, without having to pay creative labor, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is a kind of application of the vacuum boost system of the electric vehicle based on dual sensor provided in an embodiment of the present invention
Schematic diagram of a scenario；
Fig. 2 is a kind of connection of the vacuum boost system of the electric vehicle based on dual sensor provided in an embodiment of the present invention
Figure；
In figure, 1, vacuum pump：2, vacuum tank；3, vacuum tube；4, vacuum booster；5, absolute pressure transducer；6, electric power storage
Pond；7, entire car controller；8, relative pressure sensor.
Specific implementation mode
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the present invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singulative " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that is used in the specification of the present invention arranges
It refers to there are the feature, integer, step, operation, element and/or component, but it is not excluded that presence or addition to take leave " comprising "
Other one or more features, integer, step, operation, element, component and/or their group.It should be understood that when we claim member
Part is " connected " or when " coupled " to another element, it can be directly connected or coupled to other elements, or there may also be
Intermediary element.In addition, " connection " used herein or " coupling " may include being wirelessly connected or coupling.Wording used herein
"and/or" includes any cell of one or more associated list items and all combines.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific terminology) there is meaning identical with the general understanding of the those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, which should be understood that, to be had and the meaning in the context of the prior art
The consistent meaning of justice, and unless defined as here, will not be with idealizing or the meaning of too formal be explained.
For ease of the understanding to the embodiment of the present invention, done further by taking several specific embodiments as an example below in conjunction with attached drawing
Explanation, and each embodiment does not constitute the restriction to the embodiment of the present invention.
A kind of application scenarios of the vacuum boost system of electric vehicle based on dual sensor provided in an embodiment of the present invention
Schematic diagram as shown in Figure 1, concrete structure schematic diagram as shown in Fig. 2, in Fig. 1 and Fig. 2, it is vacuum pump 1, vacuum tank 2, vacuum tube 3, true
Empty booster 4, absolute pressure transducer 5, accumulator 6, VCU (Vehicle Control Unit, entire car controller) 7 and opposite
Pressure sensor 8.
Dual sensor is set in wired connection between VCU7 and vacuum booster 4：Relative pressure sensor 8 and absolutely
Pressure sensor 5 carries out the detection of system pressure and the measurement of external atmosphere pressure using dual sensor.The relative pressure passes
Sensor 8, absolute pressure transducer 5 respectively by the ground wire port of three cables and the entire car controller 7, low tension source,
Signal transmission port connects, and is connected respectively by mounting hole and the vacuum booster 4.
Vacuum boost system further includes calculating the vacuum tank 2 and vacuum pump in the form of piston 1 of checking matching plastics, utilizes vacuum
Pipe 3 connects vacuum tank 2 and vacuum pump 1, and vacuum tank 2 is also connect by vacuum tube 3 with vacuum booster 4.Vacuum pump 1 by
VCU7 is controlled and driving, entire digital electric vacuum assistance system are powered by accumulator 6.
Above-mentioned relative pressure sensor 8 measures and exports the relative pressure in digital electric vacuum assistance system, the relative pressure
For the pressure measured on the basis of atmospheric pressure.Above-mentioned absolute pressure transducer 5 measures and exports electric vacuum booster
Absolute pressure in system, the absolute pressure are the pressure on the basis of absolute vacuum to be measured.
The embodiment of the present invention additionally provides a kind of vacuum servo of the above-mentioned electric vehicle shown in FIG. 1 based on dual sensor
The pressure measurement method of system, this method include：
Obtain the pressure of the pressure and absolute pressure transducer output of relative pressure sensor output；
Calculate the sum of the pressure of the relative pressure sensor output and the pressure of absolute pressure transducer output
Value regard described and value as external atmosphere pressure；
Further, indicate absolute in the vacuum boost system with the pressure of above-mentioned absolute pressure transducer output
Pressure.
Further, using the ratio of absolute pressure and external atmosphere pressure in above-mentioned vacuum boost system as vacuum pump
One of running parameter.When the ratio of absolute pressure and external atmosphere pressure in above-mentioned vacuum boost system is more than the first threshold of setting
When value, control vacuum pump opens work；When the ratio of absolute pressure and external atmosphere pressure in above-mentioned vacuum boost system is less than
When the second threshold of setting, stop the vacuum pump work.
Above-mentioned relative pressure sensor of the embodiment of the present invention and the pressure of absolute pressure transducer output and indicate
External atmosphere pressure in digital electric vacuum assistance system.Such measurement method applies two sensors, measures external atmosphere pressure, together
When be also a kind of Redundancy Design, when a sensor fault can utilize another sensor signal control vacuum pump work.
The ratio of absolute pressure and external atmosphere pressure that the embodiment of the present invention is exported with absolute pressure transducer is true to control
Empty pump work is realized and most reasonably controls vacuum pump work in Different Altitude and atmospheric pressure.When the vacuum boost system
In absolute pressure and the ratio of external atmosphere pressure when being more than the first threshold of setting, control the vacuum pump and open work；When
When the ratio of absolute pressure and external atmosphere pressure in the vacuum boost system is less than the second threshold of setting, stop described true
Empty pump work.In practical applications, above-mentioned first threshold can be 0.5, and above-mentioned second threshold can be 0.3.
In conclusion the embodiment of the present invention is passed by the way that relative pressure sensor and absolute pressure are arranged on vacuum booster
Sensor, and the sensor signal of relative pressure sensor and absolute pressure transducer is accessed into entire car controller.Can it is accurate, have
The absolute pressure and external atmosphere pressure in the vacuum boost system of electric vehicle are measured to effect, is set by the redundancy of dual sensor
Meter, ensure that the safe and reliable of the vacuum boost system of electric vehicle.
The ratio for the absolute pressure and external atmosphere pressure that the embodiment of the present invention is exported by using absolute pressure transducer comes
Vacuum pump work is controlled, realizes and most reasonably controls vacuum pump work in Different Altitude and atmospheric pressure.
The present invention controls vacuum boost system by system external and internal pressure ratio, can be to avoid external atmosphere pressure
Change the influence to vacuum boost system, vacuum pump is made to be operated in most rational section.Avoid vacuum pump operation irregularity or damage.
The Redundancy Design of dual sensor also increases the safety and reliability of system simultaneously.
One of ordinary skill in the art will appreciate that：Attached drawing is the schematic diagram of one embodiment, module in attached drawing or
Flow is not necessarily implemented necessary to the present invention.
As seen through the above description of the embodiments, those skilled in the art can be understood that the present invention can
It is realized by the mode of software plus required general hardware platform.Based on this understanding, technical scheme of the present invention essence
On in other words the part that contributes to existing technology can be expressed in the form of software products, the computer software product
It can be stored in a storage medium, such as ROM/RAM, magnetic disc, CD, including some instructions are used so that a computer equipment
(can be personal computer, server either network equipment etc.) executes the certain of each embodiment of the present invention or embodiment
Method described in part.
Each embodiment in this specification is described in a progressive manner, identical similar portion between each embodiment
Point just to refer each other, and each embodiment focuses on the differences from other embodiments.Especially for device or
For system embodiment, since it is substantially similar to the method embodiment, so describing fairly simple, related place is referring to method
The part of embodiment illustrates.Apparatus and system embodiment described above is only schematical, wherein the conduct
The unit that separating component illustrates may or may not be physically separated, the component shown as unit can be or
Person may not be physical unit, you can be located at a place, or may be distributed over multiple network units.It can root
According to actual need that some or all of module therein is selected to achieve the purpose of the solution of this embodiment.Ordinary skill
Personnel are without creative efforts, you can to understand and implement.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
Subject to.
Claims (4)
1. a kind of vacuum boost system of electric vehicle, which is characterized in that including：Relative pressure is arranged on vacuum booster to pass
Sensor and absolute pressure transducer, and believed the sensor of the relative pressure sensor and absolute pressure transducer by cable
Number access entire car controller, the vacuum boost system is obtained using the relative pressure sensor and absolute pressure transducer
In absolute pressure and external atmosphere pressure；
Wherein, the system further includes：The vacuum tank and vacuum pump connected using vacuum tube, the vacuum tank pass through true
Blank pipe is connect with the vacuum booster；
Wherein, the absolute pressure in the vacuum boost system is indicated with the pressure of absolute pressure transducer output；
One of running parameter of the vacuum pump is the ratio of the absolute pressure and external atmosphere pressure in the vacuum boost system；
Wherein, the vacuum pump is by the vehicle control unit controls and driving；
The entire car controller is specifically used for：Obtain the pressure of the relative pressure sensor output and the absolute pressure sensor
The pressure of device output；Calculate the pressure of the pressure and absolute pressure transducer output of the relative pressure sensor output
And value, regard described and value as external atmosphere pressure；
When the ratio of absolute pressure and external atmosphere pressure in the vacuum boost system is more than the first threshold of setting, control
The vacuum pump opens work；When the ratio of absolute pressure and external atmosphere pressure in the vacuum boost system is less than setting
When second threshold, stop the vacuum pump work.
2. the vacuum boost system of electric vehicle according to claim 1, which is characterized in that the relative pressure sensing
Device, absolute pressure transducer are passed by the ground wire port of three cables and the entire car controller, low tension source, signal respectively
Defeated port connection.
3. the vacuum boost system of electric vehicle according to claim 1, which is characterized in that the relative pressure sensing
Device, absolute pressure transducer are connected by mounting hole with the vacuum booster respectively.
4. a kind of pressure measurement method of the vacuum boost system of electric vehicle, which is characterized in that be applied to claims 1 to 3
The vacuum boost system of any one of them electric vehicle, the method includes：Obtain the relative pressure sensor output
The pressure of pressure and absolute pressure transducer output；Calculate relative pressure sensor output pressure and it is described absolutely
To the pressure of pressure sensor output and value, regard described and value as external atmosphere pressure；
Wherein, the method further includes：The vacuum boost system is indicated with the pressure of absolute pressure transducer output
In absolute pressure；
Wherein, which is characterized in that one of running parameter of the vacuum pump be the vacuum boost system in absolute pressure with
The ratio of external atmosphere pressure；
Wherein, when the ratio of absolute pressure and external atmosphere pressure in the vacuum boost system is more than the first threshold of setting
When, it controls the vacuum pump and opens work；When the ratio of absolute pressure and external atmosphere pressure in the vacuum boost system is small
When the second threshold of setting, stop the vacuum pump work.
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| CN201510185470.4A CN104842987B (en) | 2015-04-01 | 2015-04-17 | The vacuum boost system and its pressure measurement method of electric vehicle |
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| CN201510152339 | 2015-04-01 | ||
| CN2015101523398 | 2015-04-01 | ||
| CN201510185470.4A CN104842987B (en) | 2015-04-01 | 2015-04-17 | The vacuum boost system and its pressure measurement method of electric vehicle |
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| CN104842987A CN104842987A (en) | 2015-08-19 |
| CN104842987B true CN104842987B (en) | 2018-09-11 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353691B (en) * | 2015-12-07 | 2018-05-25 | 北京新能源汽车股份有限公司 | Control circuit, the control method and device of the electric vacuum pump of electric vehicle |
| CN105424272A (en) * | 2015-12-28 | 2016-03-23 | 黄山迈普汽车部件有限公司 | vacuum degree sensor suitable for plateau |
| CN108106773A (en) * | 2017-12-13 | 2018-06-01 | 芜湖致通汽车电子有限公司 | Four pressure differential pressure pickups |
| CN108297854A (en) * | 2018-03-28 | 2018-07-20 | 芜湖捷欧汽车部件有限公司 | A kind of vacuum tank detection explosion-protection equipment |
| CN108873747B (en) * | 2018-06-20 | 2020-10-27 | 安徽安凯汽车股份有限公司 | Double inflation signal control method for new energy passenger car |
| CN109094544B (en) * | 2018-09-30 | 2020-10-09 | 安徽江淮汽车集团股份有限公司 | Electric automobile vacuum pump controller structure and control method |
| CN109733360B (en) * | 2018-12-18 | 2021-01-01 | 威马汽车科技集团有限公司 | Electronic vacuum pump control system and control method |
| CN109849884B (en) * | 2019-02-22 | 2020-12-18 | 威马智慧出行科技（上海）有限公司 | Automobile electronic vacuum pump control method and electronic equipment |
| CN110171410A (en) * | 2019-06-03 | 2019-08-27 | 广西玉柴机器股份有限公司 | Barometric pressure sensor redundant system |
| CN112744199A (en) * | 2019-10-31 | 2021-05-04 | 比亚迪股份有限公司 | Electro-hydraulic brake system, application method thereof and vehicle |
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| JP3382440B2 (en) * | 1995-12-26 | 2003-03-04 | 本田技研工業株式会社 | Control method of negative pressure pump |
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| CN101791980A (en) * | 2010-02-11 | 2010-08-04 | 中国汽车技术研究中心 | Electric vacuum servo device control strategy of electric car brake |
| CN102371984A (en) * | 2011-08-29 | 2012-03-14 | 温州大学 | Vacuum boosting device of electric vehicle |
| CN103350693A (en) * | 2013-07-26 | 2013-10-16 | 重庆长安汽车股份有限公司 | Method for improving brake vacuum degree |
| CN203666631U (en) * | 2013-12-30 | 2014-06-25 | 重庆长安铃木汽车有限公司 | Brake boosting control system for electric car |
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2015
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3382440B2 (en) * | 1995-12-26 | 2003-03-04 | 本田技研工業株式会社 | Control method of negative pressure pump |
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