CN112298142A - Automobile brake boosting system and method - Google Patents
Automobile brake boosting system and method Download PDFInfo
- Publication number
- CN112298142A CN112298142A CN201910711294.1A CN201910711294A CN112298142A CN 112298142 A CN112298142 A CN 112298142A CN 201910711294 A CN201910711294 A CN 201910711294A CN 112298142 A CN112298142 A CN 112298142A
- Authority
- CN
- China
- Prior art keywords
- brake
- air
- vacuum booster
- pressure cavity
- brake pedal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005192 partition Methods 0.000 claims abstract description 8
- 229910004682 ON-OFF Inorganic materials 0.000 claims description 18
- 238000005086 pumping Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 8
- 230000035484 reaction time Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 230000000994 depressed Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000003111 delayed Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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
- B60T13/24—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
- B60T13/569—Vacuum systems indirect, i.e. vacuum booster units characterised by piston details, e.g. construction, mounting of diaphragm
-
- 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
-
- 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
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors
Abstract
The invention relates to the technical field of automobiles, and discloses an automobile brake boosting system and an automobile brake boosting method based on the automobile brake boosting system, wherein the automobile brake boosting system comprises: the device comprises a vacuum booster, a turbocharger, a vacuumizing device and a brake pedal; an air chamber diaphragm partition plate is arranged in the vacuum booster to limit the interior of the vacuum booster into a positive pressure cavity and a negative pressure cavity, a vacuum valve communicated with the positive pressure cavity and the negative pressure cavity is arranged on the air chamber diaphragm partition plate, and an air valve communicated with the positive pressure cavity and a brake boosting push rod used for outputting power are arranged on the vacuum booster; the air outlet end of the turbocharger is connected with an air valve through an air duct, the vacuumizing device is connected with the negative pressure cavity, and the brake boosting push rod is connected with the brake pedal. The invention has the beneficial effects that: the turbocharger provides high-pressure air for the vacuum booster, the reaction time of the vacuum booster in the braking process is shortened, the pedal feeling is improved, and the braking distance is shortened.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to an automobile brake boosting system and method.
Background
In an automobile braking system, a vacuum booster amplifies the braking force of a brake pedal through the pressure difference between two cavities (a positive pressure cavity and a negative pressure cavity) in the vacuum booster during braking; in the braking process, the two cavities are not communicated, the positive pressure cavity is communicated with the atmosphere and supplies the atmosphere, but because the valve body structure size of an air valve communicated with the atmosphere is small, the air cannot be sufficiently and timely supplied in the braking process, the braking reaction time is increased, the braking force is delayed, the brake pedal feeling is influenced, and under the emergency braking condition, the braking distance is increased, and the driving feeling and the driving safety performance are influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an automobile brake boosting system and an automobile brake boosting method, which can ensure the quick supply of air in the braking process, shorten the braking distance and improve the pedal feeling, the driving feeling and the driving safety of a brake.
In order to achieve the above object, a first aspect of the present invention provides a brake assist system for a vehicle, comprising: the device comprises a vacuum booster, a turbocharger, a vacuumizing device and a brake pedal;
an air chamber diaphragm partition plate is arranged in the vacuum booster to limit the interior of the vacuum booster into a positive pressure cavity and a negative pressure cavity, a vacuum valve communicated with the positive pressure cavity and the negative pressure cavity is arranged on the air chamber diaphragm partition plate, and an air valve communicated with the positive pressure cavity and a brake boosting push rod used for outputting power are arranged on the vacuum booster;
the air outlet end of the turbocharger is connected with the air valve through an air duct, the vacuumizing device is connected with the negative pressure cavity, and the brake boosting push rod is connected with the brake pedal.
Preferably, the automobile brake boosting system further comprises an intercooler, and the intercooler is connected to the air guide pipe in series.
As a preferred scheme, the automobile brake power-assisted system further comprises a brake sensor, an on-off switch and a control valve which are electrically connected in sequence, wherein the control valve is connected in series with the air duct;
the brake sensor is used for sensing a signal of the brake pedal and transmitting the signal to the on-off switch, and the on-off switch can control the control valve to be opened or closed after receiving the signal.
Preferably, the brake sensor is a brake light switch, and the brake light switch is connected with the brake pedal.
Preferably, the gas guide pipe is connected with an energy accumulator in series.
Preferably, a one-way valve which only allows gas to flow from the turbocharger to the vacuum booster is connected in series with the gas guide pipe at a position between the turbocharger and the accumulator.
Preferably, the vacuum pumping device is a vacuum pump.
In a second aspect of the present invention, there is provided a brake boosting method for a vehicle based on the brake boosting system for a vehicle according to any one of the first aspect, including the steps of:
when an engine of an automobile is in an open state, judging whether a brake pedal is stepped on or released;
when the brake pedal is stepped on, an air valve of the vacuum booster is opened, the vacuum valve is closed, and the turbocharger inputs high-pressure air into a positive pressure cavity of the vacuum booster;
when the brake pedal is released, the air valve of the vacuum booster is closed, the vacuum valve is opened, the positive pressure cavity of the vacuum booster is communicated with the negative pressure cavity, and the brake pedal is reset.
Preferably, the step of judging whether the brake pedal is pressed down or released when the engine of the automobile is in an on state specifically comprises the following steps: a brake sensor acquires a signal on a brake pedal; if the brake sensor detects a brake signal, confirming that the brake pedal is stepped on; if the brake sensor detects a closing signal, confirming that the brake pedal is released;
when the brake pedal is pressed down, the method further comprises the following steps: the on-off switch is switched on, and the control valve is electrified to conduct the air duct connected between the turbocharger and the air valve;
when the brake pedal is released, the method further comprises the following steps: the on-off switch is turned off, and the control valve is turned off to cut off the air duct connecting the turbocharger and the air valve.
Preferably, the automobile brake boosting method further comprises the following steps:
after an engine of an automobile is closed, when a brake pedal is stepped down, an air valve of a vacuum booster is opened, a vacuum valve is closed, and high-pressure air is input into a positive pressure cavity of the vacuum booster by an energy accumulator;
when the brake pedal is released, the air valve of the vacuum booster is closed, the vacuum valve is opened, the positive pressure cavity of the vacuum booster is communicated with the negative pressure cavity, and the brake pedal is reset.
Compared with the prior art, the invention has the beneficial effects that:
according to the automobile braking system and method provided by the embodiment of the invention, the turbocharger is used for providing high-pressure air for the vacuum booster, so that the air in the positive pressure cavity of the vacuum booster is quickly supplemented in the braking process, the reaction time of the vacuum booster in the braking process is shortened, the pedal feeling is improved, the braking distance is shortened, and the driving feeling and the driving safety performance are improved.
Drawings
FIG. 1 is a schematic structural diagram of a brake boosting system of an automobile according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a braking boosting method for a vehicle according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of another braking boosting method for a vehicle according to an embodiment of the present invention.
In the figure, 10, vacuum booster; 11. a positive pressure chamber; 12. a negative pressure chamber; 13. a vacuum valve; 14. an air valve; 15. a brake boosting push rod; 16. a diaphragm plate of the air chamber; 20. a turbocharger; 30. a vacuum pump; 40. a brake pedal; 50. an air duct; 60. a control circuit; 61. a brake light switch; 62. an on-off switch; 63. a control valve; 70. a one-way valve; 80. an accumulator; 90. and an intercooler.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "first", "second", and the like are used to describe various information, but the information should not be limited to these terms, which are used only to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
As shown in fig. 1, a first aspect of a preferred embodiment of the present invention provides an automobile power assisted brake system, including: a vacuum booster 10, a turbocharger 20, a vacuum pumping device, and a brake pedal 40;
an air chamber diaphragm partition plate 16 is arranged in the vacuum booster 10 to limit the interior of the vacuum booster 10 into a positive pressure cavity 11 and a negative pressure cavity 12, a vacuum valve 13 communicated with the positive pressure cavity 11 and the negative pressure cavity 12 is arranged on the air chamber diaphragm partition plate 16, and an air valve 14 communicated with the positive pressure cavity 11 and a brake boosting push rod 15 used for outputting power are further arranged on the vacuum booster 10;
the air outlet end of the turbocharger 20 is connected with the air valve 14 through an air duct 50, the vacuumizing device is connected with the negative pressure cavity 12, and the brake boosting push rod 15 is connected with the brake pedal 40.
Based on the above technical scheme, provide a car braking helping hand system in this embodiment, vacuum booster 10's air valve 14 switches on in turbo charger 20's the end of giving vent to anger, and in braking process, the high-pressure gas in turbo charger 20 can be carried to vacuum booster 10's malleation chamber 11, shortens the reaction time of vacuum booster 10 in the braking process, can improve the footboard and feel, shortens braking distance, can promote driving feeling and driving safety by a wide margin.
Specifically, the brake boosting system of the vehicle in the embodiment further includes an intercooler 90, and the intercooler 90 is connected in series to the air duct 50; the high-pressure and high-temperature gas generated by the turbocharger 20 is cooled by the intercooler 90, and then the compressed gas having a suitable temperature is output to the vacuum booster 10. Illustratively, the highest pressure of the high-pressure air discharged from the outlet of the intercooler 90 does not exceed 3bar, and the internal structure and performance of the vacuum booster 10 are not affected on the premise that the high-pressure air is satisfied.
Preferably, in order to accurately determine whether the pedal is pressed down and quickly respond to the pedal, the automobile braking system further includes a control circuit 60, the control circuit 60 includes a brake sensor, an on-off switch 62 and a control valve 63 which are electrically connected in sequence, the control valve 63 is connected in series to the air duct 50, the brake sensor is used for sensing a signal of the brake pedal 40 and transmitting the signal to the on-off switch 62, and the on-off switch 62 can turn on or off the control circuit 60 after receiving the signal, so that the control valve 63 is opened or closed; the brake sensor is used for judging the intention of the driver, determining whether the driver presses the brake pedal 40, and then using the signal to switch on or off the control circuit 60, and finally switching on or off the air passage of the air duct 50.
Preferably, the brake sensor is a brake lamp switch 61, and when the driver depresses the brake pedal 40, a brake lamp in the brake lamp switch 61 is turned on, provides an on-off signal, and is output to the on-off switch 62 through an electric wire.
After the engine is shut down, no high-pressure air is discharged from the air outlet end of the turbocharger 20, and in order to ensure that the engine can be braked by several feet after being shut down, the air guide pipe 50 is connected with an energy accumulator 80 in series; the accumulator 80 stores high-pressure air, so that when the brake pedal 40 is depressed after the engine is turned off, the high-pressure air stored inside the accumulator 80 is input to the positive pressure chamber 11 of the vacuum booster 10.
Further, in order to prevent the gas from flowing backwards, a check valve 70 for allowing gas to flow from the turbocharger 20 to the vacuum booster 10 is connected in series to the gas guide tube 50 at a position between the turbocharger 20 and the accumulator 80, and when the engine is turned off and the brake pedal 40 is depressed, the check valve 70 is automatically closed to prevent the gas from flowing backwards.
Specifically, in the present embodiment, the vacuum pumping device is a vacuum pump 30, and the vacuum pump 30 provides negative pressure to the negative pressure cavity 12 of the vacuum booster 10; the vacuum pump 30 may be, for example, a mechanical vacuum pump or an electronic vacuum pump, etc.
Specifically, in this embodiment, the intercooler 90, the check valve 70, the control valve 63, and the accumulator 80 are sequentially disposed on the air duct 50, and an air outlet end of the accumulator 80 is communicated with the air valve 14.
In the same object, a second aspect of the embodiments of the present invention also provides a brake boosting method for a vehicle, which is based on the brake boosting system for a vehicle of the first aspect, as shown in fig. 2, and includes the following steps:
when an engine of the automobile is in an open state, the vacuumizing device continuously operates;
judging whether the brake pedal is stepped or released;
when the brake pedal is stepped on, an air valve of the vacuum booster is opened, the vacuum valve is closed, the turbocharger inputs high-pressure air into a positive pressure cavity of the vacuum booster, the air inflow can be increased, and the reaction time is shortened;
when the brake pedal is released, the air valve of the vacuum booster is closed, the vacuum valve is opened, the positive pressure cavity of the vacuum booster is communicated with the negative pressure cavity, and the vacuumizing device continuously operates until the brake pedal is reset.
The vehicle brake boosting method in this embodiment is based on the vehicle brake boosting system, and therefore has all the beneficial effects of the vehicle brake boosting system, which are not described herein again.
More specifically, the above-mentioned determining whether the brake pedal is depressed or released when the engine of the vehicle is in an on state specifically includes the steps of: a brake sensor acquires a signal on a brake pedal; if the brake sensor detects a brake signal, confirming that the brake pedal is stepped on; if the brake sensor detects a closing signal, confirming that the brake pedal is released; whether the pedal is stepped down or not can be accurately judged, and a quick response can be made to the judgment;
when it is determined that the brake pedal is depressed, further comprising the steps of: the on-off switch is switched on, and the control valve is electrified to conduct the air duct connected between the turbocharger and the air valve;
when it is determined that the brake pedal is released, further comprising the steps of: the on-off switch is turned off, and the control valve is turned off to cut off the air duct connecting the turbocharger and the air valve.
In the embodiment, the one-way valve and the energy accumulator are additionally arranged, so that the energy accumulator can provide several-foot brake when the engine is in a flameout state; specifically, the automobile brake boosting method further comprises the following steps:
after the engine of the automobile is closed, the vacuumizing device is closed; at the moment, the one-way valve arranged on the air duct is closed, so that the air flow can be prevented from flowing back to the turbocharger end from the vacuum booster end;
when the brake pedal is stepped on, an air valve of the vacuum booster is opened, the vacuum valve is closed, and the energy accumulator inputs high-pressure air into a positive pressure cavity of the vacuum booster;
when the brake pedal is released, the air valve of the vacuum booster is closed, the vacuum valve is opened, the positive pressure cavity of the vacuum booster is communicated with the negative pressure cavity, and the vacuumizing device continuously operates until the brake pedal is reset.
In summary, the embodiment of the present invention provides an automobile brake boosting system and method, in which an air valve of a vacuum booster is connected to an air outlet end of a turbocharger, so as to ensure that air in a positive pressure chamber of the vacuum booster is rapidly supplied during braking, shorten a reaction time of the vacuum booster during braking, improve pedal feel, and shorten a braking distance, thereby improving driving feeling and driving safety.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. An automotive brake boosting system, comprising: the device comprises a vacuum booster, a turbocharger, a vacuumizing device and a brake pedal;
an air chamber diaphragm partition plate is arranged in the vacuum booster to limit the interior of the vacuum booster into a positive pressure cavity and a negative pressure cavity, a vacuum valve communicated with the positive pressure cavity and the negative pressure cavity is arranged on the air chamber diaphragm partition plate, and an air valve communicated with the positive pressure cavity and a brake boosting push rod used for outputting power are arranged on the vacuum booster;
the air outlet end of the turbocharger is connected with the air valve through an air duct, the vacuumizing device is connected with the negative pressure cavity, and the brake boosting push rod is connected with the brake pedal.
2. The brake boosting system of claim 1, further comprising an intercooler, wherein the intercooler is connected in series to the air duct.
3. The vehicle brake boosting system according to claim 1, further comprising a brake sensor, an on-off switch and a control valve electrically connected in sequence, wherein the control valve is connected in series to the air duct;
the brake sensor is used for sensing a signal of the brake pedal and transmitting the signal to the on-off switch, and the on-off switch can control the control valve to be opened or closed after receiving the signal.
4. The vehicle brake boosting system of claim 3, wherein the brake sensor is a brake light switch, and the brake light switch is connected to the brake pedal.
5. The vehicle brake boosting system according to any one of claims 1 to 4, wherein an accumulator is connected in series to the air duct.
6. The vehicle brake boosting system of claim 5 wherein a one-way valve is coupled in series with the air conduit at a location between the turbocharger and the accumulator that only allows air to flow from the turbocharger to the vacuum booster.
7. The vehicle brake boosting system of claim 1, wherein the vacuum pumping device is a vacuum pump.
8. A brake boosting method for a vehicle, applied to the brake boosting system for a vehicle according to any one of claims 1 to 7, comprising the steps of:
when an engine of an automobile is in an open state, judging whether a brake pedal is stepped on or released;
when the brake pedal is stepped on, an air valve of the vacuum booster is opened, the vacuum valve is closed, and the turbocharger inputs high-pressure air into a positive pressure cavity of the vacuum booster;
when the brake pedal is released, the air valve of the vacuum booster is closed, the vacuum valve is opened, the positive pressure cavity of the vacuum booster is communicated with the negative pressure cavity, and the brake pedal is reset.
9. The brake boosting method for a vehicle according to claim 8,
when the engine of the automobile is in an opening state, judging whether the brake pedal is pressed down or released specifically comprises the following steps: a brake sensor acquires a signal on a brake pedal; if the brake sensor detects a brake signal, confirming that the brake pedal is stepped on; if the brake sensor detects a closing signal, confirming that the brake pedal is released;
when the brake pedal is pressed down, the method further comprises the following steps: the on-off switch is switched on, and the control valve is electrified to conduct the air duct connected between the turbocharger and the air valve;
when the brake pedal is released, the method further comprises the following steps: the on-off switch is turned off, and the control valve is turned off to cut off the air duct connecting the turbocharger and the air valve.
10. The brake boosting method of an automobile according to claim 8, further comprising the steps of:
after an engine of an automobile is closed, when a brake pedal is stepped down, an air valve of a vacuum booster is opened, a vacuum valve is closed, and high-pressure air is input into a positive pressure cavity of the vacuum booster by an energy accumulator;
when the brake pedal is released, the air valve of the vacuum booster is closed, the vacuum valve is opened, the positive pressure cavity of the vacuum booster is communicated with the negative pressure cavity, and the brake pedal is reset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910711294.1A CN112298142A (en) | 2019-08-02 | 2019-08-02 | Automobile brake boosting system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910711294.1A CN112298142A (en) | 2019-08-02 | 2019-08-02 | Automobile brake boosting system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112298142A true CN112298142A (en) | 2021-02-02 |
Family
ID=74485885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910711294.1A Pending CN112298142A (en) | 2019-08-02 | 2019-08-02 | Automobile brake boosting system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112298142A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113954800A (en) * | 2021-11-26 | 2022-01-21 | 南京工业大学 | Electric vacuum power-assisted braking system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113954800A (en) * | 2021-11-26 | 2022-01-21 | 南京工业大学 | Electric vacuum power-assisted braking system and method |
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