CN107472227A - Brake vacuum force aid system, control method and vehicle - Google Patents
Brake vacuum force aid system, control method and vehicle Download PDFInfo
- Publication number
- CN107472227A CN107472227A CN201710434585.1A CN201710434585A CN107472227A CN 107472227 A CN107472227 A CN 107472227A CN 201710434585 A CN201710434585 A CN 201710434585A CN 107472227 A CN107472227 A CN 107472227A
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- Prior art keywords
- vacuum
- brake
- aid system
- force aid
- brake vacuum
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000005259 measurement Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- 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
Abstract
The invention discloses a kind of brake vacuum force aid system, control method and vehicle.Wherein, the system includes：Vacuum booster；Brake vacuum pump, the brake vacuum pump are connected by vacuum line with the vacuum booster；Vacuum-ness detecting device, the vacuum-ness detecting device are used for the vacuum for detecting the brake vacuum force aid system；Vacuum tank, the vacuum tank can be selectively accessing the vacuum line or disconnection and the connection of the vacuum line according to the vacuum of the brake vacuum force aid system.The system of the present invention can improve the braking of brakes, ensure traffic safety.
Description
Technical field
The present invention relates to automobile technical field, more particularly to a kind of brake vacuum force aid system, control method and vehicle.
Background technology
Brake vacuum force aid system provides brake boost for driver, and so as to ensure traffic safety, therefore brake vacuum helps
The reliability of Force system is particularly important.Sometimes in frequent braking, the reliability of brake vacuum force aid system is difficult to ensure that, is such as schemed
Shown in 4, the brake vacuum force aid system in correlation technique.Have the following disadvantages：When there is continuous brake condition in vehicle, in order to
Enough brake boosts are provided, it is necessary to make brake vacuum force aid system quickly establish vacuum, but the braking in correlation technique
Vacuum boost system is continuously braked in vehicle, and what is vacuumized is less efficient, and vacuum can not be established in the short time, causes braking true
Empty force aid system generally can not provide enough brake boosts, influence traffic safety.
The content of the invention
It is contemplated that at least solves one of technical problem in above-mentioned correlation technique to a certain extent.
Therefore, first purpose of the present invention is to propose a kind of brake vacuum force aid system.The system can both meet
Conventional brake power-assisted demand, it is also ensured that establish vacuum rapidly under continuous brake condition, and then improve brakes
Braking, ensure traffic safety.
Second object of the present invention is to propose a kind of control method of brake vacuum force aid system.
Third object of the present invention is to propose a kind of vehicle.
To achieve these goals, the embodiment of the first aspect of the present invention discloses a kind of brake vacuum force aid system,
Including：Vacuum booster；Brake vacuum pump, the brake vacuum pump are connected by vacuum line with the vacuum booster；Very
Reciprocal of duty cycle detection means, the vacuum-ness detecting device are used for the vacuum for detecting the brake vacuum force aid system；Vacuum tank, institute
State vacuum tank can be selectively accessing according to the vacuum of the brake vacuum force aid system vacuum line or disconnect with
The connection of the vacuum line.
Brake vacuum force aid system according to embodiments of the present invention, vacuum tank and brake vacuum pump are subjected to parallel connection, and
By the opening and closing of control valve control vacuum tank, conventional brake power-assisted demand can be both met, it is also ensured that continuously making
Vacuum is established in the case of dynamic rapidly, and then improves the braking of brakes, ensures traffic safety, simultaneously because can be rapid
Vacuum is established, therefore reduces brake vacuum pump and is in working condition for a long time, improves the service life of brake vacuum pump.
In some instances, the vacuum tank and the brake vacuum parallel connection of pumps, it is true in the vacuum tank and the braking
It is provided with control valve between empty pump, the brake vacuum force aid system, in addition to：Controller, the controller respectively with it is described true
Reciprocal of duty cycle detection means is connected with the control valve, for control described in the vacuum degree control according to the brake vacuum force aid system
The opening and closing of valve, so that the vacuum tank accesses the vacuum line or disconnection and the connection of the vacuum line.
In some instances, the control valve is normally opened control valve.
In some instances, the controller is connected with the brake vacuum pump, and the controller is additionally operable to according to
The start and stop of brake vacuum pump described in the vacuum degree control of brake vacuum force aid system.
In some instances, the vacuum-ness detecting device is vacuum sensor.
The embodiment of the second aspect of the present invention discloses a kind of control method of brake vacuum force aid system, including following
Step：During the brake vacuum pump operation, judge whether the vacuum of the brake vacuum force aid system is less than the first threshold
Value；If it is, determine whether the duration whether more than first scheduled time；If it is, the control valve is controlled to close
Close to disconnect the connection of the vacuum tank and the vacuum line.
The control method of brake vacuum force aid system according to embodiments of the present invention, vacuum tank and brake vacuum pump are carried out
Parallel connection, and by the opening and closing of control valve control vacuum tank, can both meet conventional brake power-assisted demand, it is also ensured that
Establish vacuum rapidly under continuous brake condition, and then improve the braking of brakes, ensure traffic safety, simultaneously because
Vacuum can be established rapidly, therefore reduces brake vacuum pump and is in working condition for a long time, improve brake vacuum pump
Service life.
In some instances, in addition to：When the vacuum is recovered to Second Threshold and duration to make a reservation for more than second
During the time, the control valve is controlled to open so that the vacuum tank accesses the vacuum line.
In some instances, the first threshold and the Second Threshold, first scheduled time and described second pre-
Demarcation in advance of fixing time obtains.
In some instances, in addition to：During the brake vacuum pump operation, when the brake vacuum force aid system
When vacuum is recovered to vacuum closing threshold value, control the brake vacuum pump out of service.
In some instances, in addition to：It is less than vacuum in the vacuum of the brake vacuum force aid system and opens threshold value
When, control the brake vacuum pump operation.
The embodiment of the third aspect of the present invention discloses a kind of vehicle, including：According to the embodiment of above-mentioned first aspect
Described brake vacuum force aid system.The vehicle carries out vacuum tank and brake vacuum pump in parallel and true by control valve control
The opening and closing of slack tank, conventional brake power-assisted demand can be both met, it is also ensured that built rapidly under continuous brake condition
Vertical vacuum, and then the braking of brakes is improved, ensure traffic safety, simultaneously because vacuum can be established rapidly, because
This reduces brake vacuum pump and is in working condition for a long time, improves the service life of brake vacuum pump.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned or additional aspect and advantage combination accompanying drawings below of the present invention will be to that will become bright in the description of embodiment
Show and be readily appreciated that, wherein：
Fig. 1 is the schematic diagram of brake vacuum force aid system according to an embodiment of the invention.
Fig. 2 is the flow chart of the control method of brake vacuum force aid system according to an embodiment of the invention；
Fig. 3 is the flow chart of the control method of brake vacuum force aid system in accordance with another embodiment of the present invention；
Fig. 4 is the schematic diagram of the brake vacuum force aid system in correlation technique.
Description of reference numerals：
Vacuum booster 110, brake vacuum pump 120, vacuum tank 130, brake pedal 140, control valve 150, vacuum inspection
Survey device 160.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
Brake vacuum force aid system, control method and vehicle according to embodiments of the present invention are described below in conjunction with accompanying drawing.
Fig. 1 is the schematic diagram of brake vacuum force aid system according to an embodiment of the invention.
As shown in figure 1, brake vacuum force aid system according to an embodiment of the invention, including：Vacuum booster 110,
Brake vacuum pump 120, vacuum tank 130 and vacuum-ness detecting device 160.Wherein, vacuum-ness detecting device 160 is, for example, vacuum
Sensor.
Wherein, one end of vacuum booster 110 is connected with brake pedal 140.Brake vacuum pump 120 by vacuum line with
Vacuum booster 110 is connected.Vacuum-ness detecting device 160 is used for the vacuum for detecting brake vacuum force aid system.Vacuum tank 130
Vacuum line or disconnection and the connection of vacuum line can be selectively accessing according to the vacuum of brake vacuum force aid system.
As a specific example, with reference to shown in Fig. 1, vacuum tank 130 is in parallel with brake vacuum pump 120, in vacuum tank
Control valve 150 is provided between 130 and brake vacuum pump 120.One end of control valve 150 is connected with vacuum tank 130, wherein, control
Valve 150 is often opened, i.e.,：Control valve 150 is normally opened control valve, for example, normally open solenoid valve.Brake vacuum force aid system also includes control
Device (being not shown in Fig. 1) processed, controller is connected with vacuum-ness detecting device 160 and control valve 150 respectively, for according to braking
The opening and closing of the vacuum degree control control valve 150 of vacuum boost system, so that vacuum tank 130 accesses vacuum line or disconnected
Open the connection with vacuum line.Such as：One end of vacuum booster 110 is connected with brake pedal 150 and the other end passes through vacuum
Degree sensor 160 is connected with the other end and brake vacuum pump 120 of control valve 150 respectively.In the runtime of brake vacuum pump 120
Between, when the vacuum of brake vacuum force aid system is less than first threshold and the duration is more than first scheduled time, control valve
150 close to disconnect the connection of vacuum tank 130 and vacuum line, until vacuum is recovered to Second Threshold and duration to exceed
During second scheduled time, control valve 150 is opened so that vacuum tank 130 is accessed in vacuum line.
It should be noted that first threshold and Second Threshold, first scheduled time and second scheduled time are demarcated in advance
Arrive.
In one embodiment of the invention, controller is connected with brake vacuum pump 120, and controller is additionally operable to according to braking
The start and stop of the vacuum degree control brake vacuum pump 120 of vacuum boost system.Such as：During brake vacuum pump 120 is run, work as system
When the vacuum of dynamic vacuum boost system is recovered to vacuum closing threshold value, brake vacuum pump 120 is out of service.
Specifically, the vacuum of brake vacuum force aid system is detected less than unlatching threshold value Vac on (i.e.：Vacuum is opened
Open threshold value) when, brake vacuum pump 120 is started working, and threshold value Vac off are closed when the vacuum of brake vacuum force aid system reaches
(i.e.：Vacuum closes threshold value) when, brake vacuum pump is stopped.
Further, when the vacuum of brake vacuum force aid system is less than vacuum unlatching threshold value, controller control system
Dynamic vavuum pump 120 is run.
Wherein, control valve 150 is (i.e.：Normally open solenoid valve) working condition is as follows, and under conventional sense, control valve 150 is in and beaten
Open state, the access brake vacuum force aid system in parallel of vacuum tank 130.When the vacuum of brake vacuum force aid system is less than vacuum
When opening threshold value, brake vacuum pump 120 works, and control valve 150 is in open mode, the access brake vacuum in parallel of vacuum tank 130
Force aid system.During brake vacuum pump 120 works, vacuum is less than certain threshold value A MPa (i.e.：First threshold) more than and maintain X
Second is (i.e.：First scheduled time), control valve 150 is closed, and vacuum tank 130 is isolated with brake vacuum force aid system.When vacuum is extensive
B MPa are arrived again (i.e.：Second Threshold) and the Y seconds can be maintained (i.e.：Second scheduled time), control valve 150 is opened, and vacuum tank 130 is simultaneously
Couple into brake vacuum force aid system.It should be noted that when vacuum returns to B MPa (i.e.：Second Threshold) and can maintain Y
Second is (i.e.：Second scheduled time), the condition that control valve 150 is opened also includes：Brake pedal status is the state do not stepped on.
In the above description, Vac on, Vac off, A, B, X, Y value can determine to close beforehand through multiple test calibration
The numerical value of reason.According to ambient value and existing vacuum pumpage, Vac on=-50Mpa, Vac off=- can be set
80Mpa, A, B choose between -50Mpa~-80Mpa, and X, Y optimize control demarcation according to control strategy.
That is, starting self-test after electricity on brake vacuum force aid system, after the completion of self-test, start to detect vacuum Vac,
As Vac≤Vac on, brake vacuum pump 120 is started working, and when judging Vac ＜ A Mpa and lasting X seconds, illustrates that vacuum can not
Established in the short time, driver still has braking requirement, and brake vacuum force aid system can not provide enough brake boosts, influences
The maneuverability and security of vehicle drive, now close control valve 150, and vacuum tank 130 departs from brake vacuum force aid system.When
Vacuum Vac >=BMPa and lasting Y seconds, illustrate that vacuum meets brake boost demand enough, now open control valve 150,
By the access brake vacuum force aid system in parallel of vacuum tank 130, as vacuum Vac >=Vac off of system, brake vacuum pump
120 are stopped.
Brake vacuum force aid system according to embodiments of the present invention, vacuum tank and brake vacuum pump are subjected to parallel connection, and
By the opening and closing of control valve control vacuum tank, conventional brake power-assisted demand can be both met, it is also ensured that continuously making
Vacuum is established in the case of dynamic rapidly, and then improves the braking of brakes, ensures traffic safety, simultaneously because can be rapid
Vacuum is established, therefore reduces brake vacuum pump and is in working condition for a long time, improves the service life of brake vacuum pump.
Fig. 2 is the flow chart of the control method of brake vacuum force aid system according to an embodiment of the invention.Such as Fig. 2 institutes
Show, the control method of brake vacuum force aid system according to an embodiment of the invention, comprise the following steps：
S301：During brake vacuum pump operation, judge whether the vacuum of brake vacuum force aid system is less than the first threshold
Value
S302：If it is, determine whether the duration whether more than first scheduled time.
S303：If it is, control control valve is closed to disconnect the connection of the vacuum tank and vacuum line.
Further, when the vacuum recover to Second Threshold and duration more than second scheduled time when, control
The control valve is opened so that the vacuum tank accesses the vacuum line.
In one embodiment of the invention, first threshold and the Second Threshold, first scheduled time and described
Second scheduled time, demarcation obtained in advance.
In one embodiment of the invention, this method also includes：During the brake vacuum pump operation, when the system
When the vacuum of dynamic vacuum boost system is recovered to vacuum closing threshold value, control the brake vacuum pump out of service.
In one embodiment of the invention, this method also includes：It is small in the vacuum of the brake vacuum force aid system
When vacuum opens threshold value, the brake vacuum pump operation is controlled.
Specifically, as shown in figure 3, detecting the vacuum of brake vacuum force aid system less than unlatching threshold value Vac on
(i.e.：Vacuum opens threshold value) when, control brake vacuum pump 120 is started working, when the vacuum of brake vacuum force aid system reaches
To closing threshold value Vac off (i.e.：Vacuum closes threshold value) when, controller control brake vacuum pump is stopped.
Further, when the vacuum of brake vacuum force aid system is less than vacuum unlatching threshold value, brake vacuum is controlled
Pump 120 is run.
Control valve 150 is (i.e.：Normally open solenoid valve) working condition is as follows, and under conventional sense, control valve 150 is in open shape
State, the access brake vacuum force aid system in parallel of vacuum tank 130.When the vacuum of brake vacuum force aid system is opened less than vacuum
During threshold value, brake vacuum pump 120 works, and control valve 150 is in open mode, the access brake vacuum power-assisted in parallel of vacuum tank 130
System.During brake vacuum pump 120 works, vacuum is less than certain threshold value A MPa (i.e.：First threshold) more than and maintain the X seconds
(i.e.：First scheduled time), control valve 150 is closed, and vacuum tank 130 is isolated with brake vacuum force aid system.When vacuum is recovered
To B MPa (i.e.：Second Threshold) and the Y seconds can be maintained (i.e.：Second scheduled time), control valve 150 is opened, and vacuum tank 130 is in parallel
Access brake vacuum force aid system.It should be noted that when vacuum returns to B MPa (i.e.：Second Threshold) and can maintain the Y seconds
(i.e.：Second scheduled time), the condition that control valve 150 is opened also includes：Brake pedal status is the state do not stepped on.
The control method of brake vacuum force aid system according to embodiments of the present invention, vacuum tank and brake vacuum pump are carried out
Parallel connection, and by the opening and closing of control valve control vacuum tank, can both meet conventional brake power-assisted demand, it is also ensured that
Establish vacuum rapidly under continuous brake condition, and then improve the braking of brakes, ensure traffic safety, simultaneously because
Vacuum can be established rapidly, therefore reduces brake vacuum pump and is in working condition for a long time, improve brake vacuum pump
Service life.
It should be noted that the specific implementation of the control method of the brake vacuum force aid system of the embodiment of the present invention with
The specific implementation of the brake vacuum force aid system of the embodiment of the present invention is similar, specifically refers to the description of method part, is
Reduction redundancy, is not repeated herein.
Further, embodiment of the invention discloses that a kind of vehicle, including：According to any one above-mentioned embodiment
Brake vacuum force aid system.Vacuum tank and brake vacuum pump are carried out parallel connection by the vehicle, and control vacuum tank by control valve
Opening and closing, can both meet conventional brake power-assisted demand, it is also ensured that the vacuum under continuous brake condition is fast
Run-up is stood, and then improves the braking of brakes, ensures traffic safety, while is reduced brake vacuum pump and be in work for a long time
Make situation, improve the service life of brake vacuum pump.
In addition, other compositions of the vehicle of the embodiment of the present invention and effect are for the ordinary skill in the art
All it is known, in order to reduce redundancy, does not repeat herein.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
It is that must be directed to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be
Combined in an appropriate manner in any one or more embodiments or example.In addition, in the case of not conflicting, this area
Technical staff can be carried out the different embodiments or example and the feature of different embodiments or example described in this specification
With reference to and combination.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (10)
- A kind of 1. brake vacuum force aid system, it is characterised in that including：Vacuum booster；Brake vacuum pump, the brake vacuum pump are connected by vacuum line with the vacuum booster；Vacuum-ness detecting device, the vacuum-ness detecting device are used for the vacuum for detecting the brake vacuum force aid system；Vacuum tank, the vacuum tank can be selectively accessing the vacuum tube according to the vacuum of the brake vacuum force aid system Road or disconnection and the connection of the vacuum line.
- 2. brake vacuum force aid system according to claim 1, it is characterised in that the vacuum tank and the brake vacuum Parallel connection of pumps, control valve is provided between the vacuum tank and the brake vacuum pump,The brake vacuum force aid system, in addition to：Controller, the controller respectively with the vacuum-ness detecting device and institute Control valve is stated to be connected, for the opening and closing of control valve described in the vacuum degree control according to the brake vacuum force aid system, So that the vacuum tank accesses the vacuum line or disconnection and the connection of the vacuum line.
- 3. brake vacuum force aid system according to claim 2, it is characterised in that the control valve is normally opened control valve.
- 4. brake vacuum force aid system according to claim 2, it is characterised in that the controller and the brake vacuum Pump is connected, and the controller is additionally operable to opening for according to the vacuum degree control of brake vacuum force aid system brake vacuum pump Stop.
- 5. according to the brake vacuum force aid system described in claim any one of 1-4, it is characterised in that the vacuum degree measurement dress It is set to vacuum sensor.
- 6. a kind of control method of brake vacuum force aid system, it is characterised in that the brake vacuum force aid system is according to power Profit requires the vacuum boost system described in any one of 1-5, the described method comprises the following steps：During the brake vacuum pump operation, judge whether the vacuum of the brake vacuum force aid system is less than the first threshold Value；If it is, determine whether the duration whether more than first scheduled time；If it is, the control valve is controlled to close to disconnect the connection of the vacuum tank and vacuum line.
- 7. the control method of brake vacuum force aid system according to claim 6, it is characterised in that also include：When the vacuum recover to Second Threshold and duration more than second scheduled time when, control the control valve to open So that the vacuum tank accesses the vacuum line.
- 8. the control method of the brake vacuum force aid system according to claim 6 or 7, it is characterised in that also include：Institute During stating brake vacuum pump operation, when the vacuum of the brake vacuum force aid system is recovered to close threshold value to vacuum, control It is out of service to make the brake vacuum pump.
- 9. the control method of brake vacuum force aid system according to claim 8, it is characterised in that also include：Described When the vacuum of brake vacuum force aid system is less than vacuum unlatching threshold value, the brake vacuum pump operation is controlled.
- A kind of 10. vehicle, it is characterised in that including：According to the brake vacuum force aid system described in claim any one of 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710434585.1A CN107472227B (en) | 2017-06-09 | 2017-06-09 | Brake vacuum boosting system, control method and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710434585.1A CN107472227B (en) | 2017-06-09 | 2017-06-09 | Brake vacuum boosting system, control method and vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107472227A true CN107472227A (en) | 2017-12-15 |
| CN107472227B CN107472227B (en) | 2020-03-24 |
Family
ID=60594019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710434585.1A Active CN107472227B (en) | 2017-06-09 | 2017-06-09 | Brake vacuum boosting system, control method and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107472227B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109532807A (en) * | 2018-12-29 | 2019-03-29 | 北京汽车股份有限公司 | Vacuum boost system, the control method of vacuum boost system and vehicle |
| CN111873971A (en) * | 2020-07-30 | 2020-11-03 | 重庆长安汽车股份有限公司 | Vacuum power-assisted brake system of automobile |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01215661A (en) * | 1988-02-22 | 1989-08-29 | Nippon Denso Co Ltd | Negative pressure supply device for brake booster |
| JPH04189664A (en) * | 1990-11-21 | 1992-07-08 | Toyota Motor Corp | Differential pressure drive unit |
| CN2936861Y (en) * | 2006-06-15 | 2007-08-22 | 比亚迪股份有限公司 | Electric vehicle vacuum power brake device |
| CN102069787A (en) * | 2010-12-20 | 2011-05-25 | 奇瑞汽车股份有限公司 | Pipeline structure of vacuum power-assisted system of electric vehicle |
-
2017
- 2017-06-09 CN CN201710434585.1A patent/CN107472227B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01215661A (en) * | 1988-02-22 | 1989-08-29 | Nippon Denso Co Ltd | Negative pressure supply device for brake booster |
| JPH04189664A (en) * | 1990-11-21 | 1992-07-08 | Toyota Motor Corp | Differential pressure drive unit |
| CN2936861Y (en) * | 2006-06-15 | 2007-08-22 | 比亚迪股份有限公司 | Electric vehicle vacuum power brake device |
| CN102069787A (en) * | 2010-12-20 | 2011-05-25 | 奇瑞汽车股份有限公司 | Pipeline structure of vacuum power-assisted system of electric vehicle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109532807A (en) * | 2018-12-29 | 2019-03-29 | 北京汽车股份有限公司 | Vacuum boost system, the control method of vacuum boost system and vehicle |
| CN111873971A (en) * | 2020-07-30 | 2020-11-03 | 重庆长安汽车股份有限公司 | Vacuum power-assisted brake system of automobile |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107472227B (en) | 2020-03-24 |
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Denomination of invention: Brake vacuum power assist system, control method and vehicle Effective date of registration: 20211213 Granted publication date: 20200324 Pledgee: BEIJING AUTOMOTIVE GROUP Co.,Ltd. Pledgor: Borgward Automotive (China) Co., Ltd. Registration number: Y2021990001167 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20231201 Granted publication date: 20200324 Pledgee: BEIJING AUTOMOTIVE GROUP Co.,Ltd. Pledgor: Beijing baowo Automobile Co.,Ltd.|Borgward Automotive (China) Co., Ltd. Registration number: Y2021990001167 |