CN111196261A - Vehicle braking system and vehicle - Google Patents
Vehicle braking system and vehicle Download PDFInfo
- Publication number
- CN111196261A CN111196261A CN201811375232.XA CN201811375232A CN111196261A CN 111196261 A CN111196261 A CN 111196261A CN 201811375232 A CN201811375232 A CN 201811375232A CN 111196261 A CN111196261 A CN 111196261A
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- China
- Prior art keywords
- vacuum
- vacuum level
- level threshold
- component
- booster
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/46—Vacuum systems
- B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
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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
- B60T13/66—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 invention relates to a vehicle brake system and a vehicle. The vehicle brake system includes: a vacuum booster for storing vacuum to amplify the force applied to the pedal by the driver; a vacuum pump independently provided for supplying a vacuum degree to the vacuum booster; a vacuum level sensor configured to detect a vacuum level in the vacuum booster; the first component is connected with the vacuum pump and is used for controlling the opening or closing of the vacuum pump; and an electronic brake control module connected with the vacuum degree sensor and the first component and used for comparing the detected vacuum degree value in the vacuum booster with a preset vacuum degree threshold value so as to determine whether to turn on or turn off the vacuum pump through the first component. The invention can effectively ensure the reliability and safety of the vehicle braking system.
Description
Technical Field
The invention relates to the field of road vehicle braking systems, in particular to a vehicle braking system and a vehicle.
Background
Currently, for existing systems of braking vacuum sources for road vehicles, the following three types of solutions are mainly adopted:
1. the solution, which provides a vehicle brake vacuum source through a conventional engine intake manifold, utilizes the by-products generated during engine operation and the opening and closing of a throttle valve to provide negative pressure to a vacuum booster;
2. the solution is that a mechanical vacuum pump is used for providing a vehicle brake vacuum source, and the mechanical vacuum pump is arranged on a trailing axle of an engine, so that when the engine works, the mechanical vacuum pump is driven to work to provide negative pressure for a vacuum booster;
3. the solution, based on a conventional engine intake manifold, with an auxiliary electric vacuum pump providing the vehicle braking vacuum source, takes into account the instability of the engine capacity, and employs an auxiliary electric vacuum pump operating on the battery to provide negative pressure to the vacuum booster.
By adopting the scheme, the problem of the brake vacuum source of the current vehicle can be solved, however, the energy consumption index and the emission index of the vehicle are more and more strict as the pressure of the environmental problem and the energy problem in the world is more and more high, and the vacuum level provided by the engine is lower and lower. The traditional scheme that the engine directly provides the vacuum degree and the scheme that the auxiliary electronic vacuum pump is adopted cannot meet the requirements of a braking system, and the oil consumption of the engine can be increased by additionally arranging the mechanical vacuum pump, so that a new scheme of the vehicle braking system is urgently needed to meet the current requirements.
Disclosure of Invention
In view of the above, the present invention provides a vehicle brake system and a vehicle that effectively solves or alleviates one or more of the above problems and other problems existing in the prior art.
First, according to a first aspect of the present invention, there is provided a vehicle brake system including:
a vacuum booster for storing vacuum to amplify the force applied to the pedal by the driver;
a vacuum pump independently provided for supplying a vacuum degree to the vacuum booster;
a vacuum level sensor configured to detect a vacuum level in the vacuum booster;
the first component is connected with the vacuum pump and is used for controlling the opening or closing of the vacuum pump; and
and the electronic brake control module is connected with the vacuum degree sensor and the first component and is used for comparing the detected vacuum degree value in the vacuum booster with a preset vacuum degree threshold value so as to determine whether the vacuum pump is started or stopped through the first component.
In the vehicle brake system according to the present invention, optionally, the vehicle brake system further includes a vacuum level switch unit and a second component, the second component is connected to the vacuum level switch unit and the vacuum pump, and the vacuum level switch unit is configured to directly detect a vacuum level value in the vacuum booster and compare the vacuum level value with a set vacuum level threshold value to determine whether to turn on or off the vacuum pump through the second component.
In the vehicle brake system according to the present invention, optionally, the preset vacuum level threshold includes a first vacuum level threshold and a second vacuum level threshold, the second vacuum level threshold is greater than the first vacuum level threshold, the vacuum pump is turned on when the detected vacuum level value in the vacuum booster is less than the first vacuum level threshold, and is turned off when the detected vacuum level value in the vacuum booster is greater than the second vacuum level threshold.
In the vehicle brake system according to the present invention, optionally, the set vacuum level threshold includes a third vacuum level threshold and a fourth vacuum level threshold, the fourth vacuum level threshold is greater than the third vacuum level threshold, the third vacuum level threshold is less than the first vacuum level threshold, the vacuum pump is turned on when the directly detected vacuum level in the vacuum booster is less than the third vacuum level threshold, and is turned off when the directly detected vacuum level in the vacuum booster is greater than the fourth vacuum level threshold.
In the vehicle brake system according to the present invention, optionally, the fourth vacuum level threshold is different from the second vacuum level threshold.
In the vehicle brake system according to the present invention, optionally, the vacuum degree switch unit includes a mechanical switch connected to the second component through a wire harness, the mechanical switch turns on the vacuum pump when being closed, and the mechanical switch turns off the vacuum pump when being opened.
In the vehicle brake system according to the present invention, optionally, the first component is a solid-state relay.
In the vehicle brake system according to the present invention, optionally, the second component is an electromagnetic relay.
In the vehicle brake system according to the present invention, optionally, the vehicle brake system further includes an engine intake manifold port configured to form a negative pressure to provide a vacuum level to the vacuum booster when the engine is being charged.
Further, according to a second aspect of the invention, there is provided a vehicle provided with one or more vehicle braking systems as described in any one of the above.
The features, characteristics, advantages, etc. of the various aspects according to the present invention will become apparent from the following detailed description, which is to be read in connection with the accompanying drawings. For example, compared with the prior art, the technical scheme provided by the invention has the following technical advantages:
(1) the independent vacuum pump can be matched with an engine with low vacuum degree to be used on the whole vehicle, and the development trend of low oil consumption and low emission of the engine at present is met.
(2) The Electronic Brake Control Module (EBCM) can be used for controlling the independent vacuum pump, so that the service condition of the independent vacuum pump can be optimized, and the service life of the independent vacuum pump is prolonged.
(3) The vacuum degree switch is additionally arranged to control the independent vacuum pump, the purpose of controlling the independent vacuum pump in a backup mode can be achieved, even if the EBCM breaks down, the independent vacuum pump can be driven to work through the vacuum degree switch, and therefore safety and reliability of a vehicle braking system are improved.
(4) By using the form of the engine intake manifold port, a certain vacuum level can be provided by the engine even in the event of a failure of the independent vacuum pump, thereby enhancing the safety and reliability of the vehicle brake system.
Drawings
The present invention will be described in further detail below with reference to the drawings and examples, but it should be understood that the drawings are designed solely for purposes of illustration and are not necessarily drawn to scale, but rather are intended to conceptually illustrate the structural configurations described herein.
FIG. 1 is a schematic block diagram of an embodiment of a vehicle braking system according to the present invention.
FIG. 2 is a schematic diagram of the operation of the embodiment of FIG. 1 using an electronic brake control module.
Fig. 3 is a schematic view of the operation using the vacuum degree switching unit in the embodiment shown in fig. 1.
FIG. 4 is a schematic diagram of the operation of the embodiment of FIG. 1 using the engine intake manifold port to provide negative pressure.
Detailed Description
First, it is to be noted that the structural compositions, features, advantages, and the like of the vehicle brake system and the vehicle of the invention will be specifically described below by way of example, however, all the descriptions are for illustrative purposes only and should not be construed as forming any limitation on the invention.
Furthermore, any single feature described or implicit in an embodiment or any single feature shown or implicit in the drawings or shown or implicit in the drawings may still allow any combination or permutation to continue between the features (or their equivalents) to achieve still further embodiments of the invention that may not be directly mentioned herein.
A vehicle brake system according to the present invention is exemplarily illustrated in fig. 1 to 4, in which components such as a vacuum degree sensor 1, an Electronic Brake Control Module (EBCM)2, a first component 3, a vacuum degree switching unit 4, a second component 5, a vacuum pump 6, a vacuum booster 7, etc. are shown, black arrows in the respective drawings indicate ground, and 12V is exemplarily used as an operating voltage, and the present invention will be described in detail through this embodiment.
In the present embodiment, the vacuum pump 6 is provided separately, and is provided exclusively for supplying the vacuum level to the vacuum booster 7, so that the vacuum booster 7 can be used to amplify the force applied to the pedal by the driver by accumulating the vacuum. Because the vacuum degree provided by the engine is lower and lower, the independent vacuum pump is adopted in the scheme of the invention, so that the service life of the engine is longer, and better air extraction performance can be provided.
The vacuum sensor 1 is used for detecting and acquiring a vacuum value in the vacuum booster 7, and can be connected with the electronic brake control module 2 through a wire harness so as to transmit the detected vacuum value to the electronic brake control module 2.
The first component 3 is connected to the electronic brake control module 2 and the vacuum pump 6, and is used for controlling the operation of the vacuum pump 6 (i.e. the vacuum pump can be controlled to be turned on or off according to the instruction of the electronic brake control module 2). Generally, the first component 3 may be implemented using a solid-state relay, since the vacuum level of the engine is relatively low, and thus the independent vacuum pump 6 may be required to frequently switch the operating state, so it is appropriate to frequently perform the opening or closing operation using a solid-state relay having a relatively long service life. Of course, the invention also allows any other suitable component, such as an electromagnetic relay, to be used as the first part 3 described above, in order to better meet the various practical requirements.
The electronic brake control module 2 is a control portion in a vehicle brake system, and is connected to the vacuum level sensor 1 and the first component 3, for comparing a vacuum level in the vacuum booster 7 detected by the vacuum level sensor 1 with a vacuum level threshold preset in the electronic brake control module 2, in order to determine whether a control command is output to turn on or off the vacuum pump 6 through the first component 3, for example, the above control loop is schematically shown by a broken line frame a in fig. 2.
By way of example, the vacuum degree threshold preset in the electronic brake control module 2 may include a first vacuum degree threshold and a second vacuum degree threshold, where the second vacuum degree threshold is greater than the first vacuum degree threshold, and specific values thereof may be flexibly set and adjusted according to actual application requirements. If the electronic brake control module 2, after comparison, finds that the vacuum level in the vacuum booster 7 detected by the vacuum level sensor 1 is lower than the first vacuum level threshold, it may send a control command to the first component 3 to turn on the vacuum pump 6 to amplify the force applied to the pedal by the driver by storing the vacuum therein. When the electronic brake control module 2 compares and finds that the currently detected vacuum level in the vacuum booster 7 is greater than the second vacuum level threshold, it is no longer necessary to amplify the force applied to the pedal by the driver, and therefore a control command can be sent to the first component 3 to switch off the vacuum pump 6.
With continued reference to fig. 3, a vacuum switch unit 4 and a second component 5 are also provided in the vehicle brake system. The second component 5 may be an electromagnetic relay, for example, and is connected to the vacuum switch unit 4 and the vacuum pump 6, and is used for turning on or off the vacuum pump 6 according to a control command of the vacuum switch unit 4.
Specifically, the vacuum level switching unit 4 is configured to directly detect a vacuum level value in the vacuum booster 7, and then the vacuum level switching unit 4 compares a vacuum level threshold set therein to determine whether to output a control command to control the operation of the vacuum pump 6 through the second unit 5 such that the vacuum pump 6 is turned on or off. In fig. 3, the above control loop is schematically represented in the form of a dashed box b. By adopting the arrangement, the purpose of backup control of the independent vacuum pump can be achieved, namely, when the control loop shown by the broken line frame a of the electronic brake control module 2 and the like has a fault, the operation of the independent vacuum pump can be controlled by the control loop shown by the broken line frame b, so that the safety and the reliability of the vehicle brake system are effectively enhanced.
By way of example, the vacuum switch unit 4 may comprise a mechanical switch connected to the second component 5 by a wiring harness, which switches the vacuum pump 6 on when the mechanical switch is closed and switches the vacuum pump 6 off when the mechanical switch is open.
In an optional case, the vacuum degree threshold set in the vacuum degree switch unit 4 may include a third vacuum degree threshold and a fourth vacuum degree threshold, wherein the fourth vacuum degree threshold is greater than the third vacuum degree threshold, and the third vacuum degree threshold is smaller than the first vacuum degree threshold, and these specific values may be flexibly set and adjusted according to the actual application requirements. For example, it may be considered to set the vacuum degree threshold value in the vacuum degree switch unit 4 to be much lower than the corresponding preset vacuum degree threshold value in the electronic brake control module 2, so as to ensure that the independent vacuum pump is controlled to be turned on or off through the vacuum degree switch unit 4 and the second component 5 only when the electronic brake control module 2 fails or the vacuum degree is very low.
If, after comparison by the vacuum level switch unit 4, it is found that the directly detected vacuum level in the vacuum booster 7 is less than the third vacuum level threshold, a control command can be issued to the second component 5 to switch on the vacuum pump 6 in order to amplify the force applied by the driver to the pedal by means of its stored vacuum. When the vacuum level switch unit 4 compares and finds that the currently detected vacuum level in the vacuum booster 7 is greater than the fourth vacuum level threshold, then it is no longer necessary to amplify the force applied by the driver to the pedal, and therefore a control command can be issued to the second component 5 to switch off the vacuum pump 6.
In an alternative case, the above-mentioned fourth vacuum degree threshold value in the vacuum degree switch unit 4 may be set to be different from the second vacuum degree threshold value in the electronic brake control module 2, and their respective specific values may be selectively set according to various specific application requirements.
Referring again to FIG. 4, the control circuit for providing negative pressure using the engine intake manifold port is schematically shown in phantom at box c. Specifically, an engine intake manifold port 8 is provided in the vehicle brake system, and is provided for creating a negative pressure when the engine is being charged, thereby making it possible to provide a vacuum level to the vacuum booster 7. Through adopting above arrangement, can guarantee to provide certain vacuum for the engine when independent vacuum pump 6 has taken place the trouble to can further strengthen vehicle braking system's security and reliability.
It should be noted that the control loop shown in dashed box b and/or the control loop shown in dashed box c discussed above may not be necessary in some embodiments without departing from the spirit of the invention.
In view of the technical advantages that the vehicle braking system according to the invention has over the prior art, as described above, it is very suitable to be arranged on various types of vehicles in order to exploit these technical advantages as discussed above.
The vehicle brake system and the vehicle according to the present invention have been explained in detail above by way of examples only, and these examples are only for illustrating the principles of the present invention and the embodiments thereof, not for limiting the present invention, and various modifications and improvements can be made by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, all equivalents are intended to be included within the scope of this invention and defined in the claims which follow.
Claims (10)
1. A vehicle braking system, comprising:
a vacuum booster for storing vacuum to amplify the force applied to the pedal by the driver;
a vacuum pump independently provided for supplying a vacuum degree to the vacuum booster;
a vacuum level sensor configured to detect a vacuum level in the vacuum booster;
the first component is connected with the vacuum pump and is used for controlling the opening or closing of the vacuum pump; and
and the electronic brake control module is connected with the vacuum degree sensor and the first component and is used for comparing the detected vacuum degree value in the vacuum booster with a preset vacuum degree threshold value so as to determine whether the vacuum pump is started or stopped through the first component.
2. A vehicle brake system according to claim 1, wherein the vehicle brake system further comprises a vacuum level switch unit and a second component, the second component being connected to the vacuum level switch unit and the vacuum pump, the vacuum level switch unit being arranged to directly detect a vacuum level in the vacuum booster and compare it with a set vacuum level threshold to determine whether to switch the vacuum pump on or off by the second component.
3. The vehicle braking system according to claim 1 or 2, wherein the preset vacuum level threshold includes a first vacuum level threshold and a second vacuum level threshold, the second vacuum level threshold being greater than the first vacuum level threshold, the vacuum pump being turned on when the detected vacuum level in the vacuum booster is less than the first vacuum level threshold and turned off when the detected vacuum level in the vacuum booster is greater than the second vacuum level threshold.
4. The vehicle braking system according to claim 3, wherein the set vacuum level threshold includes a third vacuum level threshold and a fourth vacuum level threshold, the fourth vacuum level threshold being greater than the third vacuum level threshold, the third vacuum level threshold being less than the first vacuum level threshold, the vacuum pump being turned on when the directly detected vacuum level in the vacuum booster is less than the third vacuum level threshold and turned off when the directly detected vacuum level in the vacuum booster is greater than the fourth vacuum level threshold.
5. The vehicle braking system according to claim 4, wherein the fourth vacuum level threshold is different than the second vacuum level threshold.
6. The vehicle brake system according to claim 1 or 2, wherein the vacuum degree switch unit includes a mechanical switch connected to the second component through a wire harness, the mechanical switch turning on the vacuum pump when closed, and turning off the vacuum pump when open.
7. A vehicle braking system according to claim 1 or 2 wherein the first component is a solid state relay.
8. A vehicle brake system according to claim 1 or 2, wherein the second component is an electromagnetic relay.
9. A vehicle brake system according to claim 1 or claim 2 further comprising an engine intake manifold arranged to create a negative pressure to provide a vacuum level to the vacuum booster when the engine is being charged.
10. A vehicle, characterized in that the vehicle is provided with a vehicle brake system according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811375232.XA CN111196261A (en) | 2018-11-19 | 2018-11-19 | Vehicle braking system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811375232.XA CN111196261A (en) | 2018-11-19 | 2018-11-19 | Vehicle braking system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111196261A true CN111196261A (en) | 2020-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811375232.XA Pending CN111196261A (en) | 2018-11-19 | 2018-11-19 | Vehicle braking system and vehicle |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1564098A1 (en) * | 2004-02-11 | 2005-08-17 | Delphi Technologies, Inc. | Brake system including a master cylinder and a double vacuum booster |
| CN101683849A (en) * | 2008-09-28 | 2010-03-31 | 比亚迪股份有限公司 | Braking vacuum servo force system and braking vacuum servo force control method |
| DE102010002651A1 (en) * | 2010-03-08 | 2011-09-08 | Continental Teves Ag & Co. Ohg | Pneumatic brake booster for a motor vehicle brake system |
| CN106240546A (en) * | 2016-08-15 | 2016-12-21 | 金龙联合汽车工业（苏州）有限公司 | A kind of vacuum boost system for pure electric automobile hydraulic braking |
| CN106379303A (en) * | 2016-10-26 | 2017-02-08 | 浙江吉利控股集团有限公司 | Automotive electric vacuum pump control system and method |
| CN108099885A (en) * | 2017-12-13 | 2018-06-01 | 中国第汽车股份有限公司 | A kind of vacuum degree control method and system suitable for hybrid power braking |
-
2018
- 2018-11-19 CN CN201811375232.XA patent/CN111196261A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1564098A1 (en) * | 2004-02-11 | 2005-08-17 | Delphi Technologies, Inc. | Brake system including a master cylinder and a double vacuum booster |
| CN101683849A (en) * | 2008-09-28 | 2010-03-31 | 比亚迪股份有限公司 | Braking vacuum servo force system and braking vacuum servo force control method |
| DE102010002651A1 (en) * | 2010-03-08 | 2011-09-08 | Continental Teves Ag & Co. Ohg | Pneumatic brake booster for a motor vehicle brake system |
| CN106240546A (en) * | 2016-08-15 | 2016-12-21 | 金龙联合汽车工业（苏州）有限公司 | A kind of vacuum boost system for pure electric automobile hydraulic braking |
| CN106379303A (en) * | 2016-10-26 | 2017-02-08 | 浙江吉利控股集团有限公司 | Automotive electric vacuum pump control system and method |
| CN108099885A (en) * | 2017-12-13 | 2018-06-01 | 中国第汽车股份有限公司 | A kind of vacuum degree control method and system suitable for hybrid power braking |
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