CN115230663B - Vehicle vacuum power-assisted control method, system, device, equipment and storage medium - Google Patents
Vehicle vacuum power-assisted control method, system, device, equipment and storage medium Download PDFInfo
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- CN115230663B CN115230663B CN202211070652.3A CN202211070652A CN115230663B CN 115230663 B CN115230663 B CN 115230663B CN 202211070652 A CN202211070652 A CN 202211070652A CN 115230663 B CN115230663 B CN 115230663B
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- 238000004891 communication Methods 0.000 claims description 24
- 238000012545 processing Methods 0.000 claims description 10
- 230000009467 reduction Effects 0.000 claims description 9
- 230000007423 decrease Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 13
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 5
- 235000017491 Bambusa tulda Nutrition 0.000 description 5
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- 235000015334 Phyllostachys viridis Nutrition 0.000 description 5
- 239000011425 bamboo Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000000295 fuel oil Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000004590 computer program Methods 0.000 description 3
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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
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/72—Electrical control in fluid-pressure brake systems in vacuum systems or 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
- B60T13/24—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
- 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
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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
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
- B60T8/4072—Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking
- B60T8/4081—Systems with stroke simulating devices for driver input
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The application discloses a vehicle vacuum assistance control method, a system, a device, equipment and a storage medium, wherein the vehicle vacuum assistance control method comprises the following steps: receiving the vacuum degree information of the main vacuum cylinder sent by the vacuum pump controller and receiving the brake pedal displacement information sent by the brake pedal stroke sensor; judging whether the vehicle is under the working condition to be assisted or not based on the vacuum degree information and the brake pedal displacement information; and if the vehicle is under the working condition to be assisted, controlling an auxiliary vacuum cylinder to assist the vacuum booster, wherein the vacuum degree of the auxiliary vacuum cylinder is smaller than that of the main vacuum cylinder. The auxiliary vacuum cylinder with the vacuum degree smaller than that of the original main vacuum cylinder is additionally arranged in the vacuum assistance system of the vehicle, the auxiliary vacuum cylinder is controlled to assist the vacuum booster under the working condition of high braking force demand, the vacuum assistance effect is improved on the premise that the service life of the electronic vacuum pump is not influenced, and therefore the braking efficiency and the driving safety of the vehicle are improved.
Description
Technical Field
The application relates to the technical field of electric automobile vacuum assistance, in particular to a vehicle vacuum assistance control method, a system, a device, equipment and a storage medium.
Background
In recent years, new energy light trucks are rapidly developing in China. With the increasing requirements on the quality and cost of new energy vehicles, the liquid brake system gradually costs the mainstream configuration of new energy light trucks. The hydraulic brake system generally uses an electronic vacuum pump as a power-assisted source, and the service life of the hydraulic brake system can be rapidly reduced along with the improvement of the vacuum degree, so that the vacuum degree of the general new energy light truck vacuum system is designed to be between-80 kPa and-60 kPa.
The traditional fuel oil vehicle is provided with the mechanical vacuum pump, the mechanical vacuum pump can work continuously along with the rotation of the engine, the maximum vacuum degree of the traditional fuel oil vehicle can reach-98 kPa, and most of the time is maintained at-98 kPa. Compared with the traditional fuel vehicle, the new energy light truck is limited by the limitation of the maximum vacuum degree and the limitation of the service life of the electronic vacuum pump, so that the same configuration conditions are caused, the vacuum assistance effect of the new energy light truck is poor, and even the driving safety can be influenced during emergency braking.
Disclosure of Invention
The main aim of the application is to provide a vehicle vacuum power-assisted control method, a system, a device, equipment and a storage medium, which aim to solve the technical problems of poor vacuum power-assisted effect and low driving safety of new energy light truck in the prior art.
In order to achieve the above object, the present application provides a vehicle vacuum assistance control method, which is applied to a vehicle vacuum assistance control device in a vehicle vacuum assistance control system, wherein the vehicle vacuum assistance control system further comprises an auxiliary vacuum cylinder, a main vacuum cylinder, a vacuum booster, a brake pedal travel sensor and a vacuum pump controller; the main vacuum cylinder and the auxiliary vacuum cylinder are respectively communicated with the vacuum booster; the vacuum pump controller is in communication connection with the main vacuum cylinder; the vehicle vacuum power-assisted control device is respectively in communication connection with the vacuum pump controller and the brake pedal travel sensor; the vehicle vacuum assistance control device is in control connection with the auxiliary vacuum cylinder, and the vehicle vacuum assistance control method comprises the following steps:
receiving the vacuum degree information of the main vacuum cylinder sent by the vacuum pump controller and receiving the brake pedal displacement information sent by the brake pedal stroke sensor;
judging whether the vehicle is under a working condition to be assisted or not based on the vacuum degree information and the brake pedal displacement information;
and if the vehicle is under the working condition to be assisted, controlling an auxiliary vacuum cylinder to assist the vacuum booster, wherein the vacuum degree of the auxiliary vacuum cylinder is smaller than that of the main vacuum cylinder.
Optionally, the step of determining whether the vehicle is under the working condition to be assisted based on the vacuum degree information and the brake pedal displacement information includes:
determining a vacuum assistance working condition of the vacuum cylinder based on the vacuum degree information, wherein the vacuum assistance working condition comprises an abnormal assistance working condition;
determining a brake pedal condition based on the brake pedal displacement information, the brake pedal condition including an abnormal brake condition;
and if the vacuum power-assisted working condition is in the abnormal power-assisted working condition or the brake pedal working condition is in the abnormal brake working condition, the vehicle is in the working condition to be assisted.
Optionally, the abnormal power-assisted working condition includes a vacuum abnormal fluctuation working condition, a vacuum degree abnormal reduction working condition and a vacuum power-assisted failure working condition, and the step of determining the vacuum power-assisted working condition of the vacuum cylinder based on the vacuum degree information includes:
if the vacuum degree information is that the vacuum degree variation amplitude in the vacuum cylinder is larger than a preset amplitude threshold value or the vacuum degree is reduced to 0, determining that the vacuum power-assisted working condition is the vacuum abnormal fluctuation working condition;
if the vacuum degree information is that the vacuum degree in the vacuum cylinder is lower than a preset vacuum degree threshold value, determining that the vacuum power-assisted working condition is the abnormal vacuum degree reduction working condition;
And if the vacuum degree information is that the electronic vacuum pump operates and the vacuum degree in the vacuum cylinder is unchanged, determining that the vacuum power-assisted working condition is the vacuum power-assisted failure working condition.
Optionally, the abnormal braking includes an emergency braking condition and a continuous braking condition, and the step of determining the braking pedal condition based on the braking pedal displacement information includes:
if the brake pedal displacement information is that the brake pedal displacement is larger than a preset displacement threshold value, determining that the brake pedal working condition is the emergency brake working condition;
and if the brake pedal displacement information is that the brake pedal displacement times are larger than a preset displacement times threshold value, determining that the brake pedal working condition is the continuous brake working condition.
Optionally, after the step of determining whether the vehicle is under the working condition to be assisted based on the vacuum degree information and the brake pedal displacement information, the method includes:
and if the vehicle is not under the working condition to be assisted, controlling the auxiliary vacuum cylinder not to participate in the current assistance, and controlling the vacuum cylinder and assisting the vacuum booster.
Optionally, the vacuum cylinder includes a first start vacuum value and a first close vacuum value, the auxiliary vacuum cylinder includes a second start vacuum value and a second close vacuum value, wherein the first start vacuum value is greater than the second start vacuum value, the first close vacuum value is greater than the second close vacuum value, if the vehicle is under the working condition to be assisted, the vacuum degree in the auxiliary vacuum cylinder is higher than the second start vacuum value, the electronic vacuum pump is enabled, and the operation of the electronic vacuum pump is stopped until the vacuum degree in the auxiliary vacuum cylinder is higher than the second close vacuum value.
The application also provides a vehicle vacuum assistance control system, the vehicle vacuum assistance control system includes:
the auxiliary vacuum cylinder, the main vacuum cylinder, the vacuum booster, the brake pedal travel sensor, the vacuum pump controller and the vehicle vacuum booster control device; the main vacuum cylinder and the auxiliary vacuum cylinder are respectively communicated with the vacuum booster; the vacuum pump controller is in communication connection with the main vacuum cylinder; the vehicle vacuum power-assisted control device is respectively in communication connection with the vacuum pump controller and the brake pedal travel sensor; the vehicle vacuum power-assisted control device is in control connection with the auxiliary vacuum cylinder;
the vacuum pump controller is used for acquiring the vacuum degree information in the main vacuum cylinder and sending the vacuum degree information to the whole vehicle control processing device;
the auxiliary vacuum cylinder is used for assisting the vacuum booster when the vehicle is under the working condition to be assisted;
the brake pedal travel sensor is used for acquiring the displacement information of the brake pedal and sending the displacement information to the whole vehicle control processing device;
the whole vehicle control processing device is used for receiving the vacuum degree information of the main vacuum cylinder sent by the vacuum pump controller and receiving the brake pedal displacement information sent by the brake pedal stroke sensor; the vehicle is also used for judging whether the vehicle is under the working condition to be assisted or not based on the vacuum degree information and the brake pedal displacement information; and the auxiliary vacuum cylinder is also used for controlling the auxiliary vacuum cylinder to assist the vacuum booster if the vehicle is under the working condition to be assisted, wherein the vacuum degree of the auxiliary vacuum cylinder is smaller than that of the main vacuum cylinder.
The application also provides a vehicle vacuum assistance control device, the vehicle vacuum assistance control device includes:
the receiving module is used for receiving the vacuum degree information of the main vacuum cylinder sent by the vacuum pump controller and receiving the brake pedal displacement information sent by the brake pedal stroke sensor;
the judging module is used for judging whether the vehicle is under the working condition to be assisted or not based on the vacuum degree information and the brake pedal displacement information;
and the power assisting module is used for controlling the auxiliary vacuum cylinder to assist the vacuum booster if the vehicle is under the working condition to be assisted, wherein the vacuum degree of the auxiliary vacuum cylinder is smaller than that of the main vacuum cylinder.
The application also provides a vehicle vacuum assist control apparatus, the vehicle vacuum assist control apparatus includes: a memory, a processor, and a program stored on the memory for implementing the vehicle vacuum assist control method,
the memory is used for storing a program for realizing a vehicle vacuum boosting control method;
the processor is used for executing a program for realizing the vehicle vacuum assistance control method so as to realize the steps of the vehicle vacuum assistance control method.
The present application also provides a storage medium having stored thereon a program for implementing a vehicle vacuum assist control method, the program for implementing the vehicle vacuum assist control method being executed by a processor to implement the steps of the vehicle vacuum assist control method.
Compared with the prior art that new energy light truck is limited by the maximum vacuum degree limit and the service life limit of an electronic vacuum pump, the vacuum assistance control method, the system, the device, the equipment and the storage medium for the vehicle provided by the application have poor vacuum assistance effect of the new energy light truck, and even influence the driving safety during emergency braking, in the application, the vacuum degree information of a main vacuum cylinder sent by a vacuum pump controller is received, and the brake pedal displacement information sent by a brake pedal stroke sensor is received; judging whether the vehicle is under a working condition to be assisted or not based on the vacuum degree information and the brake pedal displacement information; and if the vehicle is under the working condition to be assisted, controlling an auxiliary vacuum cylinder to assist the vacuum booster, wherein the vacuum degree of the auxiliary vacuum cylinder is smaller than that of the main vacuum cylinder. That is, in the application, an auxiliary vacuum cylinder with the vacuum degree smaller than that of the original vacuum cylinder is additionally arranged in the vacuum assistance system of the vehicle, and the auxiliary vacuum cylinder is used for controlling the auxiliary vacuum cylinder to assist the vacuum booster under the working condition of large braking force demand, compared with the vacuum assistance system without additionally arranging the auxiliary vacuum cylinder, the vacuum assistance effect is effectively improved, the service life of the electronic vacuum pump is not influenced, and the braking efficiency and the driving safety of the vehicle are improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic diagram of a device architecture of a hardware operating environment according to an embodiment of the present application;
FIG. 2 is a schematic flow chart of a first embodiment of a vehicle vacuum assist control method according to the present application;
FIG. 3 is a schematic diagram of a system architecture of a first embodiment of a vehicle vacuum assist control method according to the present application;
FIG. 4 is a schematic flow chart of a second embodiment of a vehicle vacuum assist control method according to the present application;
fig. 5 is a schematic block diagram of the vacuum assist control device for the vehicle of the present application.
The realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments, referring to the attached drawings.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
As shown in fig. 1, fig. 1 is a schematic diagram of a terminal structure of a hardware running environment according to an embodiment of the present application.
The terminal in the embodiment of the application may be a PC, or may be a mobile terminal device with a display function, such as a smart phone, a tablet computer, an electronic book reader, an MP3 (Moving Picture Experts Group Audio Layer III, dynamic image expert compression standard audio layer 3) player, an MP4 (Moving Picture Experts Group Audio Layer IV, dynamic image expert compression standard audio layer 4) player, a portable computer, or the like.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
Optionally, the terminal may also include a camera, an RF (Radio Frequency) circuit, a sensor, an audio circuit, a WiFi module, and so on. Among other sensors, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display screen according to the brightness of ambient light, and a proximity sensor that may turn off the display screen and/or the backlight when the mobile terminal moves to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the acceleration in all directions (generally three axes), and can detect the gravity and the direction when the mobile terminal is stationary, and the mobile terminal can be used for recognizing the gesture of the mobile terminal (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer and knocking), and the like; of course, the mobile terminal may also be configured with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, and the like, which are not described herein.
It will be appreciated by those skilled in the art that the terminal structure shown in fig. 1 is not limiting of the terminal and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
As shown in fig. 1, an operation device, a network communication module, a user interface module, and a vehicle vacuum assist control program may be included in a memory 1005 as one type of computer storage medium.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a background server and performing data communication with the background server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be used to invoke the vehicle vacuum assist control program stored in the memory 1005.
Referring to fig. 2, an embodiment of the present application provides a vehicle vacuum assist control method, including:
step S100, receiving vacuum degree information of a main vacuum cylinder sent by a vacuum pump controller and receiving brake pedal displacement information sent by a brake pedal stroke sensor;
step S200, judging whether the vehicle is under a working condition to be assisted or not based on the vacuum degree information and the brake pedal displacement information;
and step S300, if the vehicle is under the working condition to be assisted, controlling an auxiliary vacuum cylinder to assist the vacuum booster, wherein the vacuum degree of the auxiliary vacuum cylinder is smaller than that of the main vacuum cylinder.
In this embodiment, a specific application scenario may be:
a liquid brake system and a vacuum booster are used for a new energy light truck. Compared with the traditional fuel oil vehicle, the vacuum degree of the controlled electronic vacuum pump is low, so that the same configuration conditions are caused, and the vacuum assistance effect of the new energy light truck is inferior to that of the traditional fuel oil vehicle. Particularly, when the vacuum degree is at the lower limit, the emergency braking can obviously feel that the pedal is hard, the braking effect is poor, the vacuum assistance effect of the new energy light truck is poor, and even the driving safety can be influenced during the emergency braking.
The method comprises the following specific steps:
step S100, receiving vacuum degree information of a main vacuum cylinder sent by a vacuum pump controller and receiving brake pedal displacement information sent by a brake pedal stroke sensor;
in this embodiment, the vehicle vacuum assist control method is applied to a vehicle vacuum assist control apparatus.
In this embodiment, the vacuum cylinder is an auxiliary electronic vacuum pump, and the electronic vacuum pump is used for assisting in stepping on the brake, and because the flow of the electronic vacuum pump is limited, when the vacuum pumped by the electronic vacuum pump does not reach a certain value after frequent stepping on the brake, the assistance can not be realized, but the vacuum cylinder is increased, which is equivalent to increasing the flow of the electronic vacuum pump, improving the number of times of stepping on the brake, and realizing the braking assistance.
In this embodiment, the vacuum degree information of the main vacuum cylinder is information of the rarefaction degree of the gas in the vacuum state in the main vacuum cylinder, and is usually represented by a pressure value of the gas, and the brake pedal displacement information is information of the pedal displacement caused by the brake pedal being stepped on by the driver.
In the embodiment, the device is used for receiving the vacuum degree information of the main vacuum cylinder sent by a vacuum pump controller arranged on the main vacuum cylinder, wherein the vacuum pump controller is used for monitoring the vacuum degree in the main vacuum cylinder in real time and converting the vacuum degree into a communication current signal to be sent to the device; the device is used for receiving brake pedal displacement information sent by a brake pedal displacement sensor arranged on a brake pedal, wherein the pedal displacement sensor is used for monitoring the pedal displacement condition of the brake pedal and converting the pedal displacement condition into a communication current signal to be sent to the device.
Step S200, judging whether the vehicle is under a working condition to be assisted or not based on the vacuum degree information and the brake pedal displacement information;
in this embodiment, the device determines, based on the vacuum degree information and the brake pedal displacement information, whether the vehicle is under a working condition to be assisted, where the working condition to be assisted is a working condition with a large braking force demand, including working conditions such as emergency braking and continuous braking of the vehicle, and further including working conditions when the vacuum cylinder or the electronic vacuum pump fails. Under the working condition to be assisted, the vacuum assistance effect through the vacuum cylinder and the electronic vacuum pump is poor, the brake pedal is obviously felt to be hard, the braking effect is poor, and the driving safety is influenced, so that the device needs to start the auxiliary vacuum cylinder under the working condition to be assisted.
Specifically, the step S200 includes the following steps S210 to S230:
step S210, determining a vacuum assistance working condition of the vacuum cylinder based on the vacuum degree information, wherein the vacuum assistance working condition comprises an abnormal assistance working condition;
in this embodiment, the apparatus determines, based on the vacuum degree information, a vacuum assist condition of the vacuum cylinder, where the vacuum assist condition includes abnormal assist and normal assist, the abnormal assist condition includes abnormal fluctuation of the vacuum degree in the vacuum cylinder, a decrease of the vacuum degree in the vacuum cylinder to an alarm pressure, a VCU sending a working enable to an electronic vacuum pump but a vacuum degree in the vacuum cylinder does not change, and so on; the normal assistance is non-abnormal assistance.
Specifically, the step S210 includes the following steps S211 to S213:
step S211, if the vacuum degree information is that the vacuum degree variation amplitude in the vacuum cylinder is larger than a preset amplitude threshold value or the vacuum degree is reduced to 0, determining that the vacuum power-assisted working condition is the vacuum abnormal fluctuation working condition;
in this embodiment, if the vacuum degree information indicates that the vacuum degree in the vacuum cylinder decreases or increases to a value greater than a preset magnitude threshold, or the vacuum degree decreases to 0, the apparatus determines that the vacuum assist condition is the abnormal vacuum fluctuation, where the preset magnitude threshold is set by itself. For example, when the vacuum pump controller detects that the vacuum degree in the vacuum cylinder is reduced to 0, the device judges that the current vacuum power-assisted working condition is the abnormal vacuum fluctuation.
Step S212, if the vacuum degree information is that the vacuum degree in the vacuum cylinder is lower than a preset vacuum degree threshold value, determining that the vacuum power-assisted working condition is the abnormal vacuum degree reduction working condition;
in this embodiment, if the vacuum degree information indicates that the vacuum degree in the vacuum cylinder is lower than a preset vacuum degree threshold, the device determines that the vacuum assist working condition is that the vacuum degree is abnormally reduced, where the preset vacuum degree threshold is a vacuum degree value set by itself. For example, if the preset vacuum degree threshold is-80 kpa, and the vacuum pump controller detects that the vacuum degree in the vacuum cylinder is-90 kpa and is far lower than the preset vacuum degree threshold, the device judges that the current vacuum power-assisted working condition is that the vacuum degree is abnormally reduced.
And step S213, if the vacuum degree information is that the electronic vacuum pump is operated and the vacuum degree in the vacuum cylinder is unchanged, determining that the vacuum assistance working condition is the vacuum assistance failure working condition.
In this embodiment, if the vacuum degree information is that the electronic vacuum pump operates, and the vacuum degree in the vacuum cylinder is unchanged, the device determines that the vacuum assistance working condition is that the vacuum assistance is invalid, where the electronic vacuum pump of the electric automobile adopts a vehicle-mounted power supply to provide power, and a motor on a pump body is pushed to move a piston so as to generate vacuum, so that a vacuum source is provided for a hydraulic brake system of the vehicle, and thus the braking performance of the whole vehicle is effectively improved. For example, when the VCU sends out operation enabling to the electronic vacuum pump but the vacuum degree in the vacuum cylinder is unchanged, namely, the fault problem of vacuum assistance occurs, the device judges that the current vacuum assistance working condition is the vacuum assistance failure and sends out vacuum degree fault alarm to the instrument.
In this embodiment, when the vacuum helping hand operating mode of vacuum section of thick bamboo is unusual, adopt supplementary vacuum section of thick bamboo to carry out the helping hand to vacuum booster, prevent braking inefficacy, the redundant design of vacuum section of thick bamboo can be regarded as to the supplementary vacuum section of thick bamboo that this application add promptly, is regarded as the substitution when vacuum section of thick bamboo inefficacy to this has guaranteed driver's driving safety.
Step S220, determining a brake pedal working condition based on the brake pedal displacement information, wherein the brake pedal working condition comprises an abnormal brake working condition;
in this embodiment, the device determines a brake pedal condition based on the brake pedal displacement information, where the brake pedal condition includes abnormal braking and normal braking, and the abnormal braking condition includes emergency braking and continuous braking; normal braking is not abnormal braking.
Specifically, the step S220 includes the following steps S221 to S222:
step S221, if the brake pedal displacement information is that the brake pedal displacement is larger than a preset displacement threshold value, determining that the brake pedal working condition is the emergency brake working condition;
in this embodiment, if the brake pedal displacement information is that the brake pedal displacement is greater than a preset displacement threshold, the device determines that the brake pedal working condition is the emergency braking, where the preset displacement threshold is a displacement threshold set by itself, for example, the preset displacement threshold is 100mm, and the current brake pedal displacement is 110mm, and the device determines that the brake pedal working condition is the emergency braking.
Step S222, if the brake pedal displacement information indicates that the number of brake pedal displacements is greater than a preset displacement number threshold, determining that the brake pedal working condition is the continuous brake working condition.
In this embodiment, if the brake pedal displacement information is that the brake pedal displacement frequency is greater than a preset displacement frequency threshold, the device determines that the brake pedal working condition is the continuous braking, where the preset displacement frequency threshold is set by itself, for example, the preset displacement frequency threshold is 3, and the current brake pedal displacement frequency is 4, and the device determines that the brake pedal working condition is the continuous braking.
In this embodiment, when the brake pedal condition is abnormal braking, the auxiliary vacuum cylinder is used to assist the vacuum booster, so as to improve braking efficiency during emergency braking or continuous braking, and improve driving safety of a driver.
Step S230, if the vacuum power-assisted working condition is in the abnormal power-assisted working condition or the brake pedal working condition is in the abnormal braking working condition, the vehicle is in the working condition to be assisted.
In this embodiment, if the vacuum assist condition is in the abnormal assist condition or the brake pedal condition is in the abnormal braking condition, that is, any one of vacuum abnormal fluctuation, abnormal vacuum degree reduction, vacuum assist failure, emergency braking and continuous braking is included, the vehicle is in the condition to be assisted.
And step S300, if the vehicle is under the working condition to be assisted, controlling an auxiliary vacuum cylinder to assist the vacuum booster, wherein the vacuum degree of the auxiliary vacuum cylinder is smaller than that of the main vacuum cylinder.
In this embodiment, the preset auxiliary vacuum cylinder is connected with the vacuum booster and is connected with a shutoff valve, and the whole vehicle control processing unit is in control connection with the shutoff valve; if the vehicle is under the working condition to be assisted, the device controls the shutoff valve of the auxiliary vacuum cylinder to be opened to assist the vacuum booster, wherein the vacuum degree of the auxiliary vacuum cylinder is smaller than that of the main vacuum cylinder, namely the maximum vacuum degree value of the auxiliary vacuum cylinder is smaller than that of a conventional vacuum cylinder, for example, the maximum vacuum degree of the main vacuum cylinder is-80 kPa, and the maximum vacuum degree of the auxiliary vacuum cylinder is-90 kPa. The minimum vacuum degree value of the auxiliary vacuum cylinder is also smaller than the vacuum degree value of the vacuum cylinder, for example, the minimum vacuum degree of the vacuum cylinder is-60 kPa, the minimum vacuum degree of the auxiliary vacuum cylinder is-75 kPa, namely, the vacuum degree in the auxiliary vacuum cylinder is always maintained at a higher level, so that higher vacuum assistance can be provided under the working condition to be assisted, the braking efficiency under the working condition to be assisted is improved, and the driving safety of a driver is improved.
In this embodiment, if the vehicle is not under the working condition to be assisted, the electronic vacuum pump cannot work under the high vacuum degree for a long time, so that the auxiliary vacuum cylinder does not participate in the current assistance under the normal working condition, and only the main vacuum cylinder is controlled to assist the vacuum booster.
In this embodiment, the main vacuum cylinder includes a first start vacuum value X1 and a first close vacuum value Y1, and the auxiliary vacuum cylinder includes a second start vacuum value X2 and a second close vacuum value Y2, wherein the first start vacuum value is greater than the second start vacuum value, and the first close vacuum value is greater than the second close vacuum value, that is, Y2 < Y1; x2 is less than X1; the vehicle is powered on for the first time, and the default electronic vacuum pump starts to work until the VCU receives Y2, and the electronic vacuum pump stops working. Then, under normal driving conditions, the auxiliary vacuum cylinder does not participate in braking, and the vacuum degree in the auxiliary vacuum cylinder is basically a constant pressure value. The VCU controls the start and stop of the electronic vacuum pump according to X1 and Y1. When the auxiliary vacuum cylinder participates in working, the electronic vacuum pump starts to work when the vacuum degree in the auxiliary vacuum cylinder is higher than the opening pressure X2, and the electronic vacuum pump is not stopped until the VCU receives Y2. That is, if the VCU receives the auxiliary vacuum canister opening signal X2, it must receive the auxiliary vacuum canister closing pressure signal Y2 to turn off the electronic vacuum pump. If the VCU receives X1 and then X2, Y2 must be received to stop the vacuum pump evacuation. If a conventional vacuum cylinder fails, for example, the VCU can not receive Y1 all the time, but receives Y2, the electronic vacuum pump can stop working, and a fault alarm can be sent to the instrument. And if the vehicle is under the working condition to be assisted, enabling the electronic vacuum pump when the vacuum degree in the auxiliary vacuum cylinder is higher than the second starting vacuum value, and stopping the operation of the electronic vacuum pump until the vacuum degree in the auxiliary vacuum cylinder is higher than the second closing vacuum value.
Compared with the prior art that the new energy light truck is limited by the maximum vacuum degree limit and the service life limit of the electronic vacuum pump, so that the vacuum assistance effect of the new energy light truck is poor, and the driving safety can be influenced even during emergency braking, the vehicle vacuum assistance control method provided by the application is characterized in that the vacuum degree information of the main vacuum cylinder sent by the vacuum pump controller is received, and the brake pedal displacement information sent by the brake pedal stroke sensor is received; judging whether the vehicle is under a working condition to be assisted or not based on the vacuum degree information and the brake pedal displacement information; and if the vehicle is under the working condition to be assisted, controlling an auxiliary vacuum cylinder to assist the vacuum booster, wherein the vacuum degree of the auxiliary vacuum cylinder is smaller than that of the main vacuum cylinder. That is, in the application, an auxiliary vacuum cylinder with the vacuum degree smaller than that of the original vacuum cylinder is additionally arranged in the vacuum assistance system of the vehicle, and the auxiliary vacuum cylinder is used for controlling the auxiliary vacuum cylinder to assist the vacuum booster under the working condition of large braking force demand, compared with the vacuum assistance system without additionally arranging the auxiliary vacuum cylinder, the vacuum assistance effect is effectively improved, the service life of the electronic vacuum pump is not influenced, and the braking efficiency and the driving safety of the vehicle are improved.
Based on the first embodiment, the present application further provides another embodiment, referring to fig. 4, the vehicle vacuum assist control method includes:
receiving the vacuum degree information of the main vacuum cylinder sent by the vacuum pump controller and receiving the brake pedal displacement information sent by the brake pedal stroke sensor;
determining whether a vehicle is in vacuum abnormal fluctuation, vacuum abnormal reduction, vacuum power failure, emergency braking and continuous braking working conditions based on the vacuum degree information and the brake pedal displacement information;
if the vehicle is in any working condition, controlling an auxiliary vacuum cylinder to open a shutoff valve to assist a vacuum booster, wherein the vacuum degree of the auxiliary vacuum cylinder is larger than that of the vacuum cylinder;
and if the vehicle is in a normal working condition, controlling the vacuum cylinder to open the one-way valve to assist the vacuum booster.
In this embodiment, an auxiliary vacuum cylinder with a vacuum degree greater than that of the original vacuum cylinder is additionally arranged in the vacuum assistance system of the vehicle, and the auxiliary vacuum cylinder is used for controlling the auxiliary vacuum cylinder to assist the vacuum booster under some working conditions with a large braking force demand, so that the vacuum assistance effect is improved on the premise of not affecting the service life of the electronic vacuum pump, and the braking efficiency and the driving safety of the vehicle are improved.
The present application also provides a vehicle vacuum assist control system, referring to fig. 3, the vehicle vacuum assist control system includes:
the auxiliary vacuum cylinder, the main vacuum cylinder, the vacuum booster, the brake pedal travel sensor, the vacuum pump controller and the vehicle vacuum booster control device; the main vacuum cylinder and the auxiliary vacuum cylinder are respectively communicated with the vacuum booster; the vacuum pump controller is in communication connection with the main vacuum cylinder; the vehicle vacuum power-assisted control device is respectively in communication connection with the vacuum pump controller and the brake pedal travel sensor; the vehicle vacuum power-assisted control device is in control connection with the auxiliary vacuum cylinder;
the vacuum pump controller is used for acquiring the vacuum degree information in the main vacuum cylinder and sending the vacuum degree information to the whole vehicle control processing device;
the auxiliary vacuum cylinder is used for assisting the vacuum booster when the vehicle is under the working condition to be assisted;
the brake pedal travel sensor is used for acquiring the displacement information of the brake pedal and sending the displacement information to the whole vehicle control processing device;
the whole vehicle control processing device is used for receiving the vacuum degree information of the main vacuum cylinder sent by the vacuum pump controller and receiving the brake pedal displacement information sent by the brake pedal stroke sensor; the vehicle is also used for judging whether the vehicle is under the working condition to be assisted or not based on the vacuum degree information and the brake pedal displacement information; and the auxiliary vacuum cylinder is also used for controlling the auxiliary vacuum cylinder to assist the vacuum booster if the vehicle is under the working condition to be assisted, wherein the vacuum degree of the auxiliary vacuum cylinder is smaller than that of the main vacuum cylinder.
The specific implementation manner of the vehicle vacuum assistance control system is basically the same as the above embodiments of the vehicle vacuum assistance control method, and will not be repeated here.
The present application also provides a vehicle vacuum assist control apparatus, referring to fig. 5, the vehicle vacuum assist control apparatus includes:
the receiving module 10 is used for receiving the vacuum degree information of the main vacuum cylinder sent by the vacuum pump controller and receiving the brake pedal displacement information sent by the brake pedal stroke sensor;
the judging module 20 is configured to judge whether the vehicle is under a working condition to be assisted based on the vacuum degree information and the brake pedal displacement information;
and the assisting module 30 is used for controlling the auxiliary vacuum cylinder to assist the vacuum booster if the vehicle is under the working condition to be assisted, wherein the vacuum degree of the auxiliary vacuum cylinder is smaller than that of the main vacuum cylinder.
Optionally, the judging module 20 includes:
the vacuum assistance working condition determining module is used for determining the vacuum assistance working condition of the vacuum cylinder based on the vacuum degree information, wherein the vacuum assistance working condition comprises an abnormal assistance working condition;
the brake pedal working condition determining module is used for determining a brake pedal working condition based on the brake pedal displacement information, wherein the brake pedal working condition comprises an abnormal brake working condition;
And the waiting power-assisted working condition determining module is used for determining that the vehicle is under the waiting power-assisted working condition if the vacuum power-assisted working condition is under the abnormal power-assisted working condition or the brake pedal working condition is under the abnormal brake working condition.
Optionally, the vacuum boosting condition determining module includes:
the first abnormal power-assisted module is used for determining the vacuum power-assisted working condition as the vacuum abnormal fluctuation working condition if the vacuum degree information is that the vacuum degree change amplitude in the vacuum cylinder is larger than a preset amplitude threshold value or the vacuum degree is reduced to 0;
the second abnormal power-assisted module is used for determining the vacuum power-assisted working condition as the abnormal vacuum degree reduction working condition if the vacuum degree information is that the vacuum degree in the vacuum cylinder is lower than a preset vacuum degree threshold value;
and the third abnormal power-assisted module is used for determining the vacuum power-assisted working condition as the vacuum power-assisted failure working condition if the vacuum degree information is that the electronic vacuum pump is operated and the vacuum degree in the vacuum cylinder is unchanged.
Optionally, the brake pedal condition determining module includes:
the first abnormal braking module is used for determining the braking pedal working condition as the emergency braking working condition if the braking pedal displacement information is that the braking pedal displacement is larger than a preset displacement threshold value;
And the second abnormal braking module is used for determining the brake pedal working condition to be the continuous braking working condition if the brake pedal displacement information indicates that the brake pedal displacement times are larger than a preset displacement times threshold value.
Optionally, the vehicle vacuum assist control device further includes:
and the vacuum cylinder power assisting module is used for controlling the auxiliary vacuum cylinder not to participate in the current power assisting and controlling the vacuum cylinder and assisting the vacuum booster if the vehicle is not under the working condition to be assisted.
The specific implementation manner of the vehicle vacuum assistance control device is basically the same as the above embodiments of the vehicle vacuum assistance control method, and will not be repeated here.
Referring to fig. 1, fig. 1 is a schematic diagram of a terminal structure of a hardware running environment according to an embodiment of the present application.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
Optionally, the vehicle vacuum assist control device may further include a rectangular user interface, a network interface, a camera, an RF (Radio Frequency) circuit, a sensor, an audio circuit, a WiFi module, and the like. The rectangular user interface may include a Display screen (Display), an input sub-module such as a Keyboard (Keyboard), and the optional rectangular user interface may also include a standard wired interface, a wireless interface. The network interface may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface).
It will be appreciated by those skilled in the art that the vehicle vacuum assist control apparatus structure shown in fig. 1 is not limiting of the vehicle vacuum assist control apparatus and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
As shown in fig. 1, an operating system, a network communication module, and a vehicle vacuum assist control program may be included in the memory 1005 as one type of storage medium. The operating system is a program that manages and controls the hardware and software resources of the vehicle vacuum assist control device, supporting the operation of the vehicle vacuum assist control program and other software and/or programs. The network communication module is used to enable communication between components within the memory 1005 and other hardware and software in the vehicle vacuum assist control system.
In the vehicle vacuum assist control apparatus shown in fig. 1, a processor 1001 is configured to execute a vehicle vacuum assist control program stored in a memory 1005, to implement the steps of the vehicle vacuum assist control method described in any one of the above.
The specific implementation manner of the vehicle vacuum assistance control device is basically the same as the above embodiments of the vehicle vacuum assistance control method, and will not be repeated here.
The present application also provides a storage medium having stored thereon a program for implementing a vehicle vacuum assist control method, the program for implementing the vehicle vacuum assist control method being executed by a processor to implement the vehicle vacuum assist control method as follows:
receiving the vacuum degree information of the main vacuum cylinder sent by the vacuum pump controller and receiving the brake pedal displacement information sent by the brake pedal stroke sensor;
judging whether the vehicle is under a working condition to be assisted or not based on the vacuum degree information and the brake pedal displacement information;
and if the vehicle is under the working condition to be assisted, controlling an auxiliary vacuum cylinder to assist the vacuum booster, wherein the vacuum degree of the auxiliary vacuum cylinder is smaller than that of the main vacuum cylinder.
Optionally, the step of determining whether the vehicle is under the working condition to be assisted based on the vacuum degree information and the brake pedal displacement information includes:
Determining a vacuum assistance working condition of the vacuum cylinder based on the vacuum degree information, wherein the vacuum assistance working condition comprises an abnormal assistance working condition;
determining a brake pedal condition based on the brake pedal displacement information, the brake pedal condition including an abnormal brake condition;
and if the vacuum power-assisted working condition is in the abnormal power-assisted working condition or the brake pedal working condition is in the abnormal brake working condition, the vehicle is in the working condition to be assisted.
Optionally, the abnormal power-assisted working condition includes a vacuum abnormal fluctuation working condition, a vacuum degree abnormal reduction working condition and a vacuum power-assisted failure working condition, and the step of determining the vacuum power-assisted working condition of the vacuum cylinder based on the vacuum degree information includes:
if the vacuum degree information is that the vacuum degree variation amplitude in the vacuum cylinder is larger than a preset amplitude threshold value or the vacuum degree is reduced to 0, determining that the vacuum power-assisted working condition is the vacuum abnormal fluctuation working condition;
if the vacuum degree information is that the vacuum degree in the vacuum cylinder is lower than a preset vacuum degree threshold value, determining that the vacuum power-assisted working condition is the abnormal vacuum degree reduction working condition;
and if the vacuum degree information is that the electronic vacuum pump operates and the vacuum degree in the vacuum cylinder is unchanged, determining that the vacuum power-assisted working condition is the vacuum power-assisted failure working condition.
Optionally, the abnormal braking includes an emergency braking condition and a continuous braking condition, and the step of determining the braking pedal condition based on the braking pedal displacement information includes:
if the brake pedal displacement information is that the brake pedal displacement is larger than a preset displacement threshold value, determining that the brake pedal working condition is the emergency brake working condition;
and if the brake pedal displacement information is that the brake pedal displacement times are larger than a preset displacement times threshold value, determining that the brake pedal working condition is the continuous brake working condition.
Optionally, after the step of determining whether the vehicle is under the working condition to be assisted based on the vacuum degree information and the brake pedal displacement information, the method includes:
and if the vehicle is not under the working condition to be assisted, controlling the auxiliary vacuum cylinder not to participate in the current assistance, and controlling the vacuum cylinder and assisting the vacuum booster.
Optionally, the vacuum cylinder includes a first start vacuum value and a first close vacuum value, the auxiliary vacuum cylinder includes a second start vacuum value and a second close vacuum value, wherein the first start vacuum value is greater than the second start vacuum value, the first close vacuum value is greater than the second close vacuum value, if the vehicle is under the working condition to be assisted, the vacuum degree in the auxiliary vacuum cylinder is higher than the second start vacuum value, the electronic vacuum pump is enabled, and the operation of the electronic vacuum pump is stopped until the vacuum degree in the auxiliary vacuum cylinder is higher than the second close vacuum value.
The specific implementation manner of the storage medium is basically the same as that of each embodiment of the vehicle vacuum assistance control method, and is not repeated here.
The present application also provides a computer program product comprising a computer program which, when executed by a processor, implements the steps of the vehicle vacuum assist control method described above.
The specific implementation manner of the computer program product of the present application is substantially the same as the above embodiments of the vehicle vacuum assist control method, and will not be described herein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing embodiment numbers of the present application are merely for describing, and do not represent advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) as described above, including several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method described in the embodiments of the present application.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.
Claims (10)
1. The vehicle vacuum assistance control method is characterized by being applied to a vehicle vacuum assistance control device in a vehicle vacuum assistance control system, wherein the vehicle vacuum assistance control system further comprises an auxiliary vacuum cylinder, a main vacuum cylinder, a vacuum booster, a brake pedal travel sensor and a vacuum pump controller; the main vacuum cylinder and the auxiliary vacuum cylinder are respectively communicated with the vacuum booster; the vacuum pump controller is in communication connection with the main vacuum cylinder; the vehicle vacuum power-assisted control device is respectively in communication connection with the vacuum pump controller and the brake pedal travel sensor; the vehicle vacuum assistance control device is in control connection with the auxiliary vacuum cylinder, and the vehicle vacuum assistance control method comprises the following steps:
Receiving the vacuum degree information of the main vacuum cylinder sent by the vacuum pump controller and receiving the brake pedal displacement information sent by the brake pedal stroke sensor;
judging whether the vehicle is under a working condition to be assisted or not based on the vacuum degree information and the brake pedal displacement information;
and if the vehicle is under the working condition to be assisted, controlling an auxiliary vacuum cylinder to assist the vacuum booster, wherein the vacuum degree of the auxiliary vacuum cylinder is smaller than that of the main vacuum cylinder.
2. The vehicle vacuum assist control method as set forth in claim 1, wherein the step of determining whether the vehicle is in a condition to be assisted based on the vacuum degree information and the brake pedal displacement information includes:
determining a vacuum power-assisted working condition of the main vacuum cylinder based on the vacuum degree information, wherein the vacuum power-assisted working condition comprises an abnormal power-assisted working condition;
determining a brake pedal condition based on the brake pedal displacement information, the brake pedal condition including an abnormal brake condition;
and if the vacuum power-assisted working condition is in the abnormal power-assisted working condition or the brake pedal working condition is in the abnormal brake working condition, the vehicle is in the working condition to be assisted.
3. The vehicle vacuum assist control method as set forth in claim 2, wherein the abnormal assist conditions include a vacuum abnormal fluctuation condition, a vacuum degree abnormal decrease condition, and a vacuum assist failure condition, and the step of determining the vacuum assist condition of the main vacuum cylinder based on the vacuum degree information includes:
if the vacuum degree information is that the vacuum degree variation amplitude in the main vacuum cylinder is larger than a preset amplitude threshold value or the vacuum degree is reduced to 0, determining that the vacuum power-assisted working condition is the vacuum abnormal fluctuation working condition;
if the vacuum degree information is that the vacuum degree in the main vacuum cylinder is lower than a preset vacuum degree threshold value, determining that the vacuum power-assisted working condition is the abnormal vacuum degree reduction working condition;
and if the vacuum degree information is that the electronic vacuum pump operates and the vacuum degree in the main vacuum cylinder is unchanged, determining that the vacuum power-assisted working condition is the vacuum power-assisted failure working condition.
4. The vehicle vacuum assist control method as set forth in claim 2, wherein the abnormal braking includes an emergency braking condition and a continuous braking condition, and the step of determining a braking pedal condition based on the braking pedal displacement information includes:
If the brake pedal displacement information is that the brake pedal displacement is larger than a preset displacement threshold value, determining that the brake pedal working condition is the emergency brake working condition;
and if the brake pedal displacement information is that the brake pedal displacement times are larger than a preset displacement times threshold value, determining that the brake pedal working condition is the continuous brake working condition.
5. The vehicle vacuum assist control method as set forth in claim 1, wherein after the step of determining whether the vehicle is in a condition to be assisted based on the vacuum degree information and the brake pedal displacement information, the method includes:
and if the vehicle is not under the working condition to be assisted, controlling the auxiliary vacuum cylinder not to participate in the current assistance, and controlling the main vacuum cylinder and assisting the vacuum booster.
6. The vehicle vacuum assist control method as set forth in claim 1, wherein the main vacuum cylinder includes a first start vacuum value and a first shut-off vacuum value, the auxiliary vacuum cylinder includes a second start vacuum value and a second shut-off vacuum value, wherein the first start vacuum value is greater than the second start vacuum value, the first shut-off vacuum value is greater than the second shut-off vacuum value, the electronic vacuum pump is enabled when the vacuum level in the auxiliary vacuum cylinder is higher than the second start vacuum value if the vehicle is in a condition to be assisted, and the electronic vacuum pump is stopped until the vacuum level in the auxiliary vacuum cylinder is higher than the second shut-off vacuum value.
7. A vehicle vacuum assist control system, characterized in that the vehicle vacuum assist control system comprises:
the auxiliary vacuum cylinder, the main vacuum cylinder, the vacuum booster, the brake pedal travel sensor, the vacuum pump controller and the vehicle vacuum booster control device; the main vacuum cylinder and the auxiliary vacuum cylinder are respectively communicated with the vacuum booster; the vacuum pump controller is in communication connection with the main vacuum cylinder; the vehicle vacuum power-assisted control device is respectively in communication connection with the vacuum pump controller and the brake pedal travel sensor; the vehicle vacuum power-assisted control device is in control connection with the auxiliary vacuum cylinder;
the vacuum pump controller is used for acquiring the vacuum degree information in the main vacuum cylinder and sending the vacuum degree information to the whole vehicle control processing device;
the auxiliary vacuum cylinder is used for assisting the vacuum booster when the vehicle is under the working condition to be assisted;
the brake pedal travel sensor is used for acquiring the displacement information of the brake pedal and sending the displacement information to the whole vehicle control processing device;
the whole vehicle control processing device is used for receiving the vacuum degree information of the main vacuum cylinder sent by the vacuum pump controller and receiving the brake pedal displacement information sent by the brake pedal stroke sensor; the vehicle is also used for judging whether the vehicle is under the working condition to be assisted or not based on the vacuum degree information and the brake pedal displacement information; and the auxiliary vacuum cylinder is also used for controlling the auxiliary vacuum cylinder to assist the vacuum booster if the vehicle is under the working condition to be assisted, wherein the vacuum degree of the auxiliary vacuum cylinder is smaller than that of the main vacuum cylinder.
8. A vehicle vacuum assist control apparatus, characterized by comprising:
the receiving module is used for receiving the vacuum degree information of the main vacuum cylinder sent by the vacuum pump controller and receiving the brake pedal displacement information sent by the brake pedal stroke sensor;
the judging module is used for judging whether the vehicle is under the working condition to be assisted or not based on the vacuum degree information and the brake pedal displacement information;
and the power assisting module is used for controlling the auxiliary vacuum cylinder to assist the vacuum booster if the vehicle is under the working condition to be assisted, wherein the vacuum degree of the auxiliary vacuum cylinder is smaller than that of the main vacuum cylinder.
9. A vehicle vacuum assist control apparatus, characterized by comprising: a memory, a processor, and a program stored on the memory for implementing the vehicle vacuum assist control method,
the memory is used for storing a program for realizing a vehicle vacuum boosting control method;
the processor is configured to execute a program for implementing the vehicle vacuum assist control method to implement the steps of the vehicle vacuum assist control method according to any one of claims 1 to 6.
10. A storage medium having stored thereon a program for realizing the vehicle vacuum assist control method, the program for realizing the vehicle vacuum assist control method being executed by a processor to realize the steps of the vehicle vacuum assist control method according to any one of claims 1 to 6.
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