CN113085823A - Vacuum leakage monitoring method and device of vacuum booster - Google Patents
Vacuum leakage monitoring method and device of vacuum booster Download PDFInfo
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- CN113085823A CN113085823A CN201911337068.8A CN201911337068A CN113085823A CN 113085823 A CN113085823 A CN 113085823A CN 201911337068 A CN201911337068 A CN 201911337068A CN 113085823 A CN113085823 A CN 113085823A
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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
- 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
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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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- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention provides a vacuum leakage monitoring method and a monitoring device of a vacuum booster, wherein the method comprises the following steps: acquiring the current brake pressure of a master cylinder, the current pedal pressure of a brake pedal and the current vacuum degree in a vacuum cavity of a vacuum booster; acquiring a target brake pressure of a corresponding main cylinder according to the current pedal pressure and the current vacuum degree; and identifying and determining the vacuum leakage of the vacuum booster according to the current brake pressure and the target brake pressure. The monitoring method can effectively monitor the brake system leakage in the vehicle brake working condition, so that a user can take corresponding measures in time according to the vacuum leakage condition, the traffic accident is avoided, and the driving safety is ensured.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a vacuum leakage monitoring method of a vacuum booster, a vacuum leakage monitoring device of the vacuum booster, an electronic control unit and a vehicle.
Background
At present, a vacuum boosting system of a braking system can generate higher vacuum pressure or vacuum pumping by a vacuum pump by depending on an engine intake manifold, and when a brake pedal is stepped down, the pressure difference between a front cavity and a rear cavity of a vacuum booster generates boosting force for braking, so that the braking is ensured to be timely and effective. The vacuum system has extremely severe requirements on the sealing performance of each part, once vacuum leakage occurs, the brake system loses power assistance, normal braking cannot be realized, the vehicle is scratched slightly and is destroyed or killed seriously, and the consequences are unreasonable, so that the vacuum power assistance system for automobile development at the present stage is seriously: 1. strictly controlling the vacuum sealing performance of parts (a vacuum booster, a vacuum pump or an engine intake manifold and a vacuum pipeline) of a vacuum boosting system; 2. and monitoring whether the vacuum leaks in real time through an effective detection strategy.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, a first object of the present invention is to provide a vacuum leakage monitoring method for a vacuum booster, which can effectively monitor the brake system leakage occurring in the vehicle brake condition, so that a user can take corresponding measures in time according to the vacuum leakage condition, thereby avoiding traffic accidents and ensuring driving safety.
A second object of the present invention is to provide a vacuum leakage monitoring device of a vacuum booster.
A third object of the invention is to propose an electronic control unit.
A fourth object of the invention is to propose a vehicle.
In order to achieve the above object, a first embodiment of the present invention provides a vacuum leakage monitoring method for a vacuum booster, including: acquiring the current brake pressure of a master cylinder, the current pedal pressure of a brake pedal and the current vacuum degree in a vacuum cavity of a vacuum booster; acquiring corresponding target brake pressure of the master cylinder according to the current pedal pressure and the current vacuum degree; and identifying and determining that the vacuum leakage of the vacuum booster occurs according to the current brake pressure and the target brake pressure.
According to the vacuum leakage monitoring method of the vacuum booster, the current brake pressure of the main cylinder, the current pedal pressure of the brake pedal and the current vacuum degree in the vacuum cavity of the vacuum booster are obtained, the corresponding target brake pressure of the main cylinder is obtained according to the current pedal pressure and the current vacuum degree, and the vacuum leakage of the vacuum booster is identified and determined according to the current brake pressure and the target brake pressure. Therefore, the method can effectively monitor the brake system leakage occurring in the vehicle brake working condition, so that a user can take corresponding measures in time according to the vacuum leakage condition, the traffic accident is avoided, and the driving safety is ensured.
In addition, the vacuum leakage monitoring method of the vacuum booster according to the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the present invention, the identifying and determining that the vacuum booster has a vacuum leak according to the current brake pressure and the target brake pressure includes: and if the current brake pressure is smaller than the target brake pressure of a set multiple, determining that the vacuum leakage of the vacuum booster occurs, wherein the set multiple is equal to or smaller than 1.
According to an embodiment of the invention, the value range of the set multiple is 0.85-0.95.
According to an embodiment of the present invention, the vacuum leakage monitoring method of the vacuum booster further includes: and if the current brake pressure is equal to or greater than the target brake pressure of the set multiple, determining that the vacuum leakage does not occur in the vacuum booster.
According to one embodiment of the present invention, the acquiring the corresponding target brake pressure of the master cylinder according to the current pedal pressure and the current vacuum degree includes: acquiring the corresponding relation between the brake pressure and the pedal pressure under different vacuum degrees; obtaining the brake pressure corresponding to the current pedal pressure and the current vacuum degree according to the corresponding relation between the brake pressure and the pedal pressure under different vacuum degrees; and taking the brake pressure corresponding to the current pedal pressure and the current vacuum degree as the target brake pressure.
According to an embodiment of the present invention, before acquiring the current brake pressure of the master cylinder, the current pedal pressure of the brake pedal, and the current vacuum degree in the vacuum chamber of the vacuum booster, the method further includes: detecting whether a brake pedal is in a treading state; and if so, executing the step of acquiring the current brake pressure of the master cylinder, the current pedal pressure of the brake pedal and the current vacuum degree in the vacuum cavity of the vacuum booster.
According to an embodiment of the present invention, the vacuum leakage monitoring method of the vacuum booster further includes: and if not, acquiring the current vacuum degree, detecting according to the current vacuum degree, and determining that the vacuum leakage of the vacuum booster occurs.
In order to achieve the above object, a second embodiment of the present invention provides a vacuum leakage monitoring device for a vacuum booster, comprising: the first acquisition module is used for acquiring the current brake pressure of the master cylinder, the current pedal pressure of a brake pedal and the current vacuum degree in a vacuum cavity of the vacuum booster; the second acquisition module is used for acquiring corresponding target brake pressure of the master cylinder according to the current pedal pressure and the current vacuum degree; and the detection determining module is used for detecting and determining that the vacuum leakage of the vacuum booster occurs according to the current brake pressure and the target brake pressure.
According to the vacuum leakage monitoring device of the vacuum booster, the first obtaining module obtains the current brake pressure of the main cylinder, the current pedal pressure of the brake pedal and the current vacuum degree in the vacuum cavity of the vacuum booster, the second obtaining module obtains the corresponding target brake pressure of the main cylinder according to the current pedal pressure and the current vacuum degree, and the detection determining module detects and determines that the vacuum booster generates vacuum leakage according to the current brake pressure and the target brake pressure. Therefore, the device can effectively monitor the leakage of the brake system in the vehicle brake working condition, so that a user can timely take corresponding measures according to the vacuum leakage condition, traffic accidents are avoided, and driving safety is guaranteed.
In addition, the vacuum leakage monitoring device of the vacuum booster according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the invention, the detection determining module detects and determines to stop the vacuum booster from generating vacuum leakage according to the current brake pressure and the target brake pressure, and is specifically configured to determine that the vacuum booster generates vacuum leakage if the current brake pressure is less than the target brake pressure by a set multiple, where the set multiple is equal to or less than 1.
According to an embodiment of the invention, the value range of the set multiple is 0.85-0.95.
According to an embodiment of the present invention, the detection determination is further configured to determine that no vacuum leakage has occurred in the vacuum booster when the current brake pressure is equal to or greater than the target brake pressure by the set multiple.
According to an embodiment of the invention, the second obtaining module obtains the corresponding target brake pressure of the master cylinder according to the current pedal pressure and the current vacuum degree, and is specifically configured to obtain the corresponding relationship between the brake pressure and the pedal pressure at different vacuum degrees; obtaining the brake pressure corresponding to the current pedal pressure and the current vacuum degree according to the corresponding relation between the brake pressure and the pedal pressure under different vacuum degrees; and taking the brake pressure corresponding to the current pedal pressure and the current vacuum degree as the target brake pressure.
According to an embodiment of the present invention, the vacuum leakage monitoring device of the vacuum booster further includes: and the control module is used for detecting whether the brake pedal is in a treading state or not, and when the brake pedal is in the treading state, acquiring the current brake pressure of the master cylinder, the current pedal pressure of the brake pedal and the current vacuum degree in the vacuum cavity of the vacuum booster through the first acquisition module.
According to an embodiment of the invention, the control module is further configured to acquire the current vacuum degree through the first acquisition module when the brake pedal is not in a treading state, and detect and determine that the vacuum leakage of the vacuum booster occurs according to the current vacuum degree through the detection determination.
To achieve the above object, an embodiment of a third aspect of the present invention proposes an electronic control unit including: the vacuum leakage monitoring device of the vacuum booster is described above.
The electronic control unit of the embodiment of the invention can effectively monitor the brake system leakage occurring in the vehicle brake working condition through the vacuum leakage monitoring device of the vacuum booster, so that a user can take corresponding measures in time according to the vacuum leakage condition, thereby avoiding traffic accidents and ensuring the driving safety.
In order to achieve the above object, a fourth aspect of the present invention provides a vehicle, including: the electronic control unit is described above.
According to the vehicle provided by the embodiment of the invention, the electronic control unit can effectively monitor the brake system leakage in the vehicle brake working condition, so that a user can timely take corresponding measures according to the vacuum leakage condition, the traffic accident is avoided, and the driving safety is ensured.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a flow chart of a vacuum leak monitoring method of a vacuum booster according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of brake pressure and pedal pressure at different vacuum levels, according to one embodiment of the present invention;
FIG. 3 is a block schematic diagram of a vacuum leak monitoring arrangement of a vacuum booster according to an embodiment of the present invention;
FIG. 4 is a block schematic diagram of a vacuum leak monitoring arrangement of a vacuum booster according to one embodiment of the present invention;
FIG. 5 is a block schematic diagram of an electronic control unit according to an embodiment of the invention; and
FIG. 6 is a block schematic diagram of a vehicle according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A vacuum leak monitoring method of a vacuum booster, a vacuum leak monitoring apparatus of a vacuum booster, an electronic control unit, and a vehicle according to embodiments of the present invention will be described below with reference to the accompanying drawings.
The vacuum booster is used as a common brake booster in an automobile and is widely applied, the two chambers are total, the front chamber is a vacuum chamber and is connected with a vacuum pump or an engine intake manifold, and the rear chamber is a working chamber. When the driver does not step on the brake pedal, the front cavity and the rear cavity are communicated, the two cavities are both vacuum, when the driver steps on the brake pedal, the front cavity and the rear cavity are disconnected, the rear cavity sucks air, pressure difference is formed between the rear cavity and the front cavity for assisting, when the driver releases the brake pedal, the rear cavity stops sucking the atmosphere, the front cavity and the rear cavity are communicated again, the air in the rear cavity enters the front cavity, the vacuum degree of the front cavity is reduced, the air is sucked away by a vacuum pump or an engine intake manifold after entering the front cavity, and the vacuum of the front cavity and the vacuum of the rear.
In the related art, when a driver does not step on a brake pedal (non-braking working condition), and when the vacuum degree value is monitored to be abnormally reduced, an Electronic Control Unit (ECU) sends a leakage fault signal of a vacuum boosting system, an actuator limits the speed of a vehicle and immediately reminds a driver of vehicle maintenance. However, when the driver has a vacuum leak during the pedaling process (braking condition), especially the dynamic sealing of the vacuum booster has a problem, and the system cannot judge whether the vacuum degree is reduced due to the leak or the pedaling process of the driver, so that effective detection and early warning cannot be performed at present.
Therefore, the vacuum leakage monitoring method of the vacuum booster can effectively monitor the leakage of the braking system in the braking working condition of the vehicle, so that a user can timely take corresponding measures according to the vacuum leakage condition, traffic accidents are avoided, and driving safety is guaranteed.
Fig. 1 is a flowchart of a vacuum leak monitoring method of a vacuum booster according to an embodiment of the present invention.
As shown in fig. 1, a vacuum leakage monitoring method of a vacuum booster according to an embodiment of the present invention may include the steps of:
and S1, acquiring the current brake pressure of the master cylinder, the current pedal pressure of the brake pedal and the current vacuum degree in the vacuum cavity of the vacuum booster.
The current braking pressure of the master cylinder can be acquired through a corresponding pressure sensor; the pressure of the brake pedal can be acquired through a pressure sensor arranged on the brake pedal; the vacuum degree in the vacuum cavity of the vacuum booster can be obtained by a vacuum degree detection sensor, and can also be obtained by calculation according to a calculation formula, such as the vacuum degree is atmospheric pressure-absolute pressure.
And S2, acquiring the target brake pressure of the corresponding master cylinder according to the current pedal pressure and the current vacuum degree.
According to one embodiment of the present invention, acquiring a target brake pressure of a corresponding master cylinder from a current pedal pressure and a current vacuum degree includes: acquiring the corresponding relation between the brake pressure and the pedal pressure under different vacuum degrees; obtaining brake pressure corresponding to the current pedal pressure and the current vacuum degree according to the corresponding relation between the brake pressure and the pedal pressure under different vacuum degrees; the brake pressure corresponding to the current pedal pressure and the current vacuum level is taken as the target brake pressure.
Specifically, a vacuum booster boosting characteristic curve (a corresponding relation between a master cylinder brake pressure and a pedal pressure) under different vacuum degrees is obtained in advance and stored in an ECU of a vehicle, as shown in fig. 2, the vacuum booster boosting characteristic curve is stored by taking 100bar as a gradient from 0bar to 800bar, and the boosting characteristic curve under the intermediate vacuum degree which is not stored can be fitted according to two adjacent curves in equal proportion. After the pedal pressure of the current brake pedal is obtained, the boosting characteristic curve of the vacuum booster under different vacuum degrees is obtained, and the master cylinder brake pressure corresponding to the current pedal pressure under the current vacuum degree is obtained as the target brake pressure according to the characteristic curve.
And S3, detecting and determining that the vacuum leakage of the vacuum booster occurs according to the current brake pressure and the target brake pressure.
According to one embodiment of the present invention, detecting and determining that a vacuum leakage occurs in a vacuum booster based on a current brake pressure and a target brake pressure includes: and if the current brake pressure is smaller than the target brake pressure of the set multiple, determining that the vacuum leakage of the vacuum booster occurs, wherein the set multiple is equal to or smaller than 1. The value range of the set multiple can be 0.85-0.95.
According to an embodiment of the present invention, the vacuum leakage monitoring method of the vacuum booster further includes: and if the current brake pressure is equal to or greater than the target brake pressure of the set multiple, determining that the vacuum leakage does not occur in the vacuum booster.
Specifically, in order to solve the problem of monitoring and diagnosing the leakage of the vacuum system in the process of pedaling (braking condition) of the driver, a brake pedal pressure sensor is added on a pedal, a vacuum booster boosting characteristic curve under different vacuum conditions is input in a control process, an ECU reads the vacuum degree and the brake pedal pressure in a vacuum cavity of the vacuum booster in real time, after the target brake pressure of the master cylinder is acquired according to the control logic, it is determined whether the vacuum booster is leaked, for example, when the current brake pressure of the master cylinder is detected to be less than 90% of the target master cylinder brake pressure in the vacuum booster boosting characteristic curve under the vacuum degree and the brake pedal force, the vacuum leakage is judged, the ECU limits the speed of the vehicle, the driver is immediately reminded to carry out vehicle maintenance, and traffic accidents in the vehicle running process are avoided; and when the current brake pressure of the master cylinder is detected to be greater than or equal to 90% of the target master cylinder brake pressure in the vacuum booster boosting characteristic curve under the vacuum degree and the brake pedal force, judging that the vacuum booster does not generate vacuum leakage.
Therefore, the control strategy only adds one brake pedal pressure sensor, adds vacuum booster boosting characteristic curves under different vacuum degrees in the control system and a monitoring strategy, has little change on the structure of the existing brake system and is easy to realize.
According to an embodiment of the present invention, before acquiring the current brake pressure of the master cylinder, the current pedal pressure of the brake pedal, and the current vacuum degree in the vacuum chamber of the vacuum booster, the method further includes: detecting whether a brake pedal is in a treading state; and if so, executing the step of acquiring the current brake pressure of the master cylinder, the current pedal pressure of the brake pedal and the current vacuum degree in the vacuum cavity of the vacuum booster.
Further, according to an embodiment of the present invention, the vacuum leakage monitoring method further includes: if not, acquiring the current vacuum degree, detecting according to the current vacuum degree, and determining that the vacuum leakage of the vacuum booster occurs.
Specifically, according to the application, a brake pedal pressure sensor is added on a traditional brake pedal, a vacuum boosting characteristic curve under different vacuum degrees is added in a control strategy, and a brake pressure signal and a pedal pressure signal are added for monitoring on the basis of an original control strategy. The vacuum leakage monitoring strategy added to the present application is divided into two cases. Firstly, monitoring is started when a driver steps on a pedal (braking working condition), a brake pedal signal is 1, and whether vacuum leakage occurs in a vacuum booster is judged according to the current braking pressure of a main cylinder, the current pedal pressure of the brake pedal and the current vacuum degree in a vacuum cavity of the vacuum booster; and secondly, when the driver does not step on the brake pedal (non-braking working condition, pedal signal is 0), the control is carried out according to the traditional monitoring strategy, namely, whether vacuum leakage occurs or not is judged only according to the current vacuum degree, and when the vacuum degree is abnormal, if the vacuum degree is not in the preset range, the vacuum leakage occurs.
Therefore, before executing the control logic, the state of the brake pedal is detected, and if the brake pedal is in a treading state, the first control strategy is executed, and if the brake pedal is not in the treading state, the second control strategy is executed.
According to the analysis, the vacuum leakage problem of the brake system when the pedal is not stepped (non-braking working condition) and when the pedal is stepped (braking working condition) can be comprehensively monitored, the running safety of the vehicle is guaranteed, the leakage in the pedal process is eliminated, and especially the potential safety hazard after the problem occurs in the dynamic sealing of the vacuum booster is avoided.
In summary, according to the vacuum leakage monitoring method of the vacuum booster in the embodiment of the present invention, the current brake pressure of the master cylinder, the current pedal pressure of the brake pedal, and the current vacuum degree in the vacuum cavity of the vacuum booster are obtained, the corresponding target brake pressure of the master cylinder is obtained according to the current pedal pressure and the current vacuum degree, and the vacuum leakage of the vacuum booster is detected and determined according to the current brake pressure and the target brake pressure. Therefore, the method can effectively monitor the brake system leakage occurring in the vehicle brake working condition, so that a user can take corresponding measures in time according to the vacuum leakage condition, the traffic accident is avoided, and the driving safety is ensured.
FIG. 3 is a block schematic diagram of a vacuum leak monitoring arrangement of a vacuum booster according to an embodiment of the present invention.
As shown in fig. 3, the vacuum leakage monitoring apparatus of the vacuum booster according to the embodiment of the present invention may include: a first acquisition module 10, a second acquisition module 20 and a detection determination module 30.
The first obtaining module 10 is configured to obtain a current brake pressure of the master cylinder, a current pedal pressure of the brake pedal, and a current vacuum degree in a vacuum chamber of the vacuum booster. The second obtaining module 20 is configured to obtain a target brake pressure of the corresponding master cylinder according to the current pedal pressure and the current vacuum level. The detection determination module 30 is used for detecting and determining that the vacuum leakage of the vacuum booster occurs according to the current brake pressure and the target brake pressure.
According to an embodiment of the present invention, the detection determining module 30 detects and determines that the vacuum leakage occurs in the vacuum booster according to the current brake pressure and the target brake pressure, and specifically, determines that the vacuum leakage occurs in the vacuum booster if the current brake pressure is less than the target brake pressure by a set multiple, where the set multiple is equal to or less than 1.
According to an embodiment of the invention, the value range of the setting multiple is 0.85-0.95.
According to an embodiment of the present invention, the detection determination module 30 is further configured to determine that no vacuum leakage occurs in the vacuum booster when the current brake pressure is equal to or greater than the target brake pressure by the set multiple.
According to an embodiment of the present invention, the second obtaining module 20 obtains the corresponding target brake pressure of the master cylinder according to the current pedal pressure and the current vacuum degree, and is specifically configured to obtain the corresponding relationship between the brake pressure and the pedal pressure at different vacuum degrees; obtaining brake pressure corresponding to the current pedal pressure and the current vacuum degree according to the corresponding relation between the brake pressure and the pedal pressure under different vacuum degrees; the brake pressure corresponding to the current pedal pressure and the current vacuum level is taken as the target brake pressure.
According to an embodiment of the present invention, as shown in fig. 4, the vacuum leakage monitoring device of the vacuum booster further includes: and the control module 40 is used for detecting whether the brake pedal is in a treading state or not, and acquiring the current brake pressure of the master cylinder, the current pedal pressure of the brake pedal and the current vacuum degree in the vacuum cavity of the vacuum booster through the first acquisition module when the brake pedal is in the treading state.
According to an embodiment of the invention, the control module 40 is further configured to acquire a current vacuum degree through the first acquisition module 10 when the brake pedal is not in a depressed state, and detect and determine that the vacuum leakage of the vacuum booster occurs according to the current vacuum degree through the detection determination module 30.
It should be noted that, for details not disclosed in the vacuum leakage monitoring device of the vacuum booster according to the embodiment of the present invention, please refer to details disclosed in the vacuum leakage monitoring method of the vacuum booster according to the embodiment of the present invention, and detailed description thereof is omitted here.
According to the vacuum leakage monitoring device of the vacuum booster, the first obtaining module obtains the current brake pressure of the main cylinder, the current pedal pressure of the brake pedal and the current vacuum degree in the vacuum cavity of the vacuum booster, the second obtaining module obtains the corresponding target brake pressure of the main cylinder according to the current pedal pressure and the current vacuum degree, and the detection determining module detects and determines that the vacuum booster generates vacuum leakage according to the current brake pressure and the target brake pressure. Therefore, the device can effectively monitor the leakage of the brake system in the vehicle brake working condition, so that a user can timely take corresponding measures according to the vacuum leakage condition, traffic accidents are avoided, and driving safety is guaranteed.
FIG. 5 is a block schematic diagram of an electronic control unit according to an embodiment of the invention.
As shown in fig. 5, the electronic control unit 100 according to the embodiment of the present invention includes: the vacuum leakage monitoring device 110 of the vacuum booster described above.
The electronic control unit of the embodiment of the invention can effectively monitor the brake system leakage occurring in the vehicle brake working condition through the vacuum leakage monitoring device of the vacuum booster, so that a user can take corresponding measures in time according to the vacuum leakage condition, thereby avoiding traffic accidents and ensuring the driving safety.
FIG. 6 is a block schematic diagram of a vehicle according to an embodiment of the present invention.
As shown in fig. 6, a vehicle 200 according to an embodiment of the present invention includes: the electronic control unit 100 described above.
According to the vehicle provided by the embodiment of the invention, the electronic control unit can effectively monitor the brake system leakage in the vehicle brake working condition, so that a user can timely take corresponding measures according to the vacuum leakage condition, the traffic accident is avoided, and the driving safety is ensured.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A method of monitoring vacuum leak of a vacuum booster, comprising:
acquiring the current brake pressure of a master cylinder, the current pedal pressure of a brake pedal and the current vacuum degree in a vacuum cavity of a vacuum booster;
acquiring corresponding target brake pressure of the master cylinder according to the current pedal pressure and the current vacuum degree;
and identifying and determining that the vacuum leakage of the vacuum booster occurs according to the current brake pressure and the target brake pressure.
2. The vacuum leak monitoring method of claim 1, wherein said identifying and determining that the vacuum booster has a vacuum leak based on the current brake pressure and the target brake pressure comprises:
and if the current brake pressure is smaller than the target brake pressure of a set multiple, determining that the vacuum leakage of the vacuum booster occurs, wherein the set multiple is equal to or smaller than 1.
3. The vacuum leak monitoring method according to claim 2, wherein the setting multiple is in a range of 0.85 to 0.95.
4. The vacuum leak monitoring method of claim 2, further comprising:
and if the current brake pressure is equal to or greater than the target brake pressure of the set multiple, determining that the vacuum leakage does not occur in the vacuum booster.
5. The vacuum leak monitoring method of claim 1, wherein the obtaining a corresponding target brake pressure of the master cylinder from the current pedal pressure and the current vacuum level comprises:
acquiring the corresponding relation between the brake pressure and the pedal pressure under different vacuum degrees;
obtaining the brake pressure corresponding to the current pedal pressure and the current vacuum degree according to the corresponding relation between the brake pressure and the pedal pressure under different vacuum degrees;
and taking the brake pressure corresponding to the current pedal pressure and the current vacuum degree as the target brake pressure.
6. The vacuum leak monitoring method according to claim 1, wherein before the obtaining the current brake pressure of the master cylinder, the current pedal pressure of the brake pedal, and the current vacuum level in the vacuum chamber of the vacuum booster, further comprising:
detecting whether a brake pedal is in a treading state;
and if so, executing the step of acquiring the current brake pressure of the master cylinder, the current pedal pressure of the brake pedal and the current vacuum degree in the vacuum cavity of the vacuum booster.
7. The vacuum leak monitoring method of claim 6, further comprising:
and if not, acquiring the current vacuum degree, detecting according to the current vacuum degree, and determining that the vacuum leakage of the vacuum booster occurs.
8. A vacuum leak monitoring device of a vacuum booster, comprising:
the first acquisition module is used for acquiring the current brake pressure of the master cylinder, the current pedal pressure of a brake pedal and the current vacuum degree in a vacuum cavity of the vacuum booster;
the second acquisition module is used for acquiring corresponding target brake pressure of the master cylinder according to the current pedal pressure and the current vacuum degree;
and the detection determining module is used for detecting and determining that the vacuum leakage of the vacuum booster occurs according to the current brake pressure and the target brake pressure.
9. An electronic control unit, comprising: the vacuum leak monitoring device of a vacuum booster of claim 8.
10. A vehicle, characterized by comprising: an electronic control unit according to claim 9.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113734135A (en) * | 2021-09-28 | 2021-12-03 | 安徽江淮汽车集团股份有限公司 | Hydraulic braking assistance auxiliary control method based on ESC |
| CN115158272A (en) * | 2022-06-30 | 2022-10-11 | 东风商用车有限公司 | Leakage prediction method and device for air brake system |
| CN115214593A (en) * | 2022-07-20 | 2022-10-21 | 广州汽车集团股份有限公司 | Jamming fault detection method, jamming fault detection device, jamming fault processing method, control system and medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102416941A (en) * | 2011-10-29 | 2012-04-18 | 北京长安汽车工程技术研究有限责任公司 | Method and device for matching pure electric vehicle and braking vacuum pump |
| CN102717790A (en) * | 2012-06-14 | 2012-10-10 | 浙江师范大学 | Electrical control vacuum booster |
| CN104309603A (en) * | 2014-09-30 | 2015-01-28 | 联合汽车电子有限公司 | Method for diagnosing air leakage of vacuum air suction system for providing vacuum degree of brake system |
| CN106740781A (en) * | 2017-01-18 | 2017-05-31 | 安徽江淮汽车集团股份有限公司 | A kind of control system and method for vacuum automobile power-assisted |
-
2019
- 2019-12-23 CN CN201911337068.8A patent/CN113085823A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102416941A (en) * | 2011-10-29 | 2012-04-18 | 北京长安汽车工程技术研究有限责任公司 | Method and device for matching pure electric vehicle and braking vacuum pump |
| CN102717790A (en) * | 2012-06-14 | 2012-10-10 | 浙江师范大学 | Electrical control vacuum booster |
| CN104309603A (en) * | 2014-09-30 | 2015-01-28 | 联合汽车电子有限公司 | Method for diagnosing air leakage of vacuum air suction system for providing vacuum degree of brake system |
| CN106740781A (en) * | 2017-01-18 | 2017-05-31 | 安徽江淮汽车集团股份有限公司 | A kind of control system and method for vacuum automobile power-assisted |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113734135A (en) * | 2021-09-28 | 2021-12-03 | 安徽江淮汽车集团股份有限公司 | Hydraulic braking assistance auxiliary control method based on ESC |
| CN115158272A (en) * | 2022-06-30 | 2022-10-11 | 东风商用车有限公司 | Leakage prediction method and device for air brake system |
| CN115158272B (en) * | 2022-06-30 | 2023-05-30 | 东风商用车有限公司 | Leakage prediction method and device for air brake system |
| CN115214593A (en) * | 2022-07-20 | 2022-10-21 | 广州汽车集团股份有限公司 | Jamming fault detection method, jamming fault detection device, jamming fault processing method, control system and medium |
| CN115214593B (en) * | 2022-07-20 | 2023-11-17 | 广州汽车集团股份有限公司 | Detection method, device, processing method, control system and medium for stuck fault |
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