Control system of vacuum pump assembly

Abstract

The utility model provides a control system of a vacuum pump assembly, which belongs to the technical field of automobile braking and comprises a sensor module, a control module, a vacuum pump assembly, a pipeline assembly, a vacuum tank assembly, a vacuum booster with a master cylinder assembly and a brake pedal assembly. The air pressure information of the pipeline assembly is input into the control module; the control module determines atmospheric pressure through the current position information; the control module calculates a first threshold pressure and a second threshold pressure through the atmospheric pressure; when the air pressure of the pipeline assembly is greater than the first threshold pressure, the control module controls the vacuum pump assembly to start; when the air pressure of the pipeline assembly is smaller than the second threshold pressure, the control module controls the vacuum pump assembly to be closed. According to the utility model, the braking effect of the automobile in a high-altitude area is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile brake, specifically, the utility model relates to a control system of vacuum pump assembly. BACKGROUND

[0002] With the development of the automobile industry, the control requirement of the automobile is higher and higher, the existing automobile will appear pedal force heavy, brake insufficient with the elevation, this will influence the personal safety of the driver, and influence the driving experience.

[0003] Chinese patent publication No. CN1968842A relates to a method for providing vacuum for a brake operating device of a motor vehicle brake system, the brake operating device comprising a pneumatic brake booster (11) whose interior space is divided into at least one vacuum chamber and at least one working chamber, a brake master cylinder (2) and a pneumatic motor-pump unit (3) for providing vacuum in the vacuum chamber, the motor-pump unit comprising a vacuum pump (6) and an electric motor (7) driving the vacuum pump (6), wherein a sensor (9) detects the vacuum level in the vacuum chamber or the pressure difference between the vacuum chamber and the working chamber, when the vacuum in the vacuum chamber falls below a specified first lower vacuum level, the motor-pump unit is switched on by an electronic control module (12), and when a specified second upper vacuum level is reached, the motor-pump unit is switched off.

[0004] The prior art does not improve the brake effect of the automobile at different altitudes, which will affect the driving safety of the automobile. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a control system of vacuum pump assembly to improve the brake effect of the automobile.

[0006] In order to realize the above-mentioned purpose, the utility model takes the technical scheme that:

[0007] The utility model provides a control system of vacuum pump assembly, including sensor module, control module, vacuum pump assembly, pipeline assembly, vacuum tank assembly, vacuum booster with master cylinder assembly and brake pedal assembly, the sensor module is used for detecting the air pressure in the pipeline assembly, the output end of sensor module is connected with the input end of control module, the output end of control module is connected with the input end of vacuum pump assembly, the vacuum pump assembly is connected with the pipeline assembly, the pipeline assembly is connected with the vacuum tank assembly, the pipeline assembly is connected with vacuum booster with master cylinder assembly, vacuum booster with master cylinder assembly is connected with brake pedal assembly.

[0008] The sensor module inputs pressure detection information to the control module, the control module outputs control instructions to the vacuum pump assembly, the vacuum pump assembly outputs vacuum to the vacuum tank and vacuum booster with master cylinder assembly through the pipeline assembly respectively, and the vacuum booster with master cylinder assembly outputs thrust to the brake pedal assembly.

[0009] The sensor module adopts an air pressure sensor, and an output end of the air pressure sensor is connected to an input end of the control module.

[0010] The control module adopts a vehicle controller.

[0011] The vacuum pump assembly adopts an electric vacuum pump, an output end of the control module is connected to an input end of the electric vacuum pump, and an output end of the electric vacuum pump is connected to the pipeline assembly through a one-way valve.

[0012] The pipeline assembly and the vacuum booster with master cylinder assembly are connected through a one-way valve.

[0013] The technical effect of the utility model is:

[0014] (1) the utility model optimizes energy consumption, and the vacuum pump assembly is controlled to start and stop according to needs, the vacuum pump assembly is automatically started and stopped according to the comparison result of pipeline air pressure and dynamic threshold value, and only works when needed, thereby reducing unnecessary energy consumption. The vacuum tank assembly stores the vacuum source, stabilizes the system vacuum degree, reduces the frequency of frequent starting of the vacuum pump assembly, and further reduces energy consumption.

[0015] (2) the utility model calculates the altitude according to the vehicle position, dynamically adjusts the threshold pressure, and ensures that the vacuum source can be stably provided in different air pressure environments such as plateau and plain.

[0016] (3) in the utility model, the vacuum tank assembly quickly releases the stored vacuum in emergency braking, enhances the brake force amplification effect of the vacuum booster, shortens the braking distance, and improves the driving safety.

[0017] (4) in the utility model, one-way valves are used at the connection positions of the pipeline assembly, the vacuum booster with master cylinder assembly and the vacuum pump assembly, the vacuum backflow is prevented, and the system stability is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present specification includes the following drawings, and the shown contents are respectively:

[0019] Figure 1 It is a logic structure block diagram of the control system of the vacuum pump assembly of the utility model;

[0020] Figure 1 The middle mark is: 1, sensor module;2, control module;3, vacuum pump assembly;4, pipeline assembly;5, vacuum tank assembly;6, vacuum booster with master cylinder assembly;7, brake pedal assembly. DETAILED DESCRIPTION

[0021] The specific embodiments of the utility model are further explained in detail below with reference to the drawings and the description of the embodiments, which aims to help the skilled in the art to have a more complete, accurate and in-depth understanding of the utility model concept and technical scheme of the utility model, and to help its implementation.

[0022] The utility model provides a kind of control system of vacuum pump assembly, including sensor module 1, control module 2, vacuum pump assembly 3, pipeline assembly 4, vacuum tank assembly 5, vacuum booster with master cylinder assembly 6 and brake pedal assembly 7, sensor module 1 is used to detect the air pressure in pipeline assembly 4, the output end of sensor module 1 is connected with the input end of control module 2, the output end of control module 2 is connected with the input end of vacuum pump assembly 3, vacuum pump assembly 3 is connected with pipeline assembly 4, pipeline assembly 4 is connected with vacuum tank assembly 5, pipeline assembly 4 is connected with vacuum booster with master cylinder assembly 6, vacuum booster with master cylinder assembly 6 is connected with brake pedal assembly 7.

[0023] Sensor module 1 inputs pressure detection information to control module 2, control module 2 outputs control instruction to vacuum pump assembly 3, vacuum pump assembly 3 outputs vacuum to vacuum tank and vacuum booster with master cylinder assembly 6 respectively through pipeline assembly 4, vacuum booster with master cylinder assembly 6 outputs thrust to brake pedal assembly 7.

[0024] Sensor module 1 uses air pressure sensor, and the output end of air pressure sensor is connected with the input end of control module 2.Control module 2 uses vehicle controller.Vacuum pump assembly 3 uses electric vacuum pump, and the output end of control module 2 is connected with the input end of electric vacuum pump, and the output end of electric vacuum pump is connected with pipeline assembly 4 through check valve.Pipeline assembly 4 is connected with vacuum booster with master cylinder assembly 6 through check valve.

[0025] The utility model discloses a kind of control system of vacuum pump assembly.

[0026] The utility model discloses a kind of control system of vacuum pump assembly, including sensor module 1, control module 2, vacuum pump assembly 3, pipeline assembly 4, vacuum tank assembly 5, vacuum booster with master cylinder assembly 6 and brake pedal assembly 7, wherein sensor module 1 uses air pressure sensor, for detecting the air pressure in pipeline assembly 4, and the air pressure information of pipeline assembly 4 is transmitted to control module 2.

[0027] The control module 2 adopts a vehicle controller, is used for controlling the work of the vacuum pump assembly 3, and provides a vacuum source for the vacuum booster in the vacuum booster and master cylinder assembly 6. The vehicle-mounted electrical element T-BOX obtains the position information of the current vehicle through the GPS module, and inputs the position information of the current vehicle to the control module 2 through the bus. The control module 2 determines the altitude according to the position information of the current vehicle, calculates the current atmospheric pressure, and calculates the first threshold pressure and the second threshold pressure through the atmospheric pressure. Then, the air pressure of the pipeline assembly 4 is compared with the first threshold pressure and the second threshold pressure, and the opening and closing of the vacuum pump assembly 3 is controlled. In the utility model, the control module 2 does not need a new air pressure sensor to obtain the information of the atmospheric pressure, but determines the altitude through the current position, and then calculates the atmospheric pressure, thereby reducing the cost. The specific model of the vehicle controller in the utility model embodiment is VCU3.0.

[0028] The vacuum pump assembly 3 adopts an electric vacuum pump, is used for outputting a vacuum source to the pipeline assembly 4, and the pipeline assembly transmits the vacuum source to the vacuum tank assembly 5 and the vacuum booster and master cylinder assembly 6 respectively. The vacuum pump assembly 3 is opened when the air pressure of the pipeline assembly 4 is greater than the first threshold pressure, and is closed when the air pressure of the pipeline assembly 4 is less than the second threshold pressure. The vacuum pump assembly 3 reduces the energy consumption of the vehicle under the premise of providing sufficient vacuum source.

[0029] The pipeline assembly 4 adopts a rubber hose, is used for transmitting the vacuum source output by the vacuum pump assembly 3 to the vacuum tank assembly 5 and the vacuum booster and master cylinder assembly 6 respectively, and the pipeline assembly 4 is connected with the vacuum booster and master cylinder assembly 6 through a one-way valve, so as to ensure the one-way transmission of the vacuum source from the pipeline assembly 4 to the vacuum booster and master cylinder assembly 6. The pipeline assembly can also adopt a silica gel hose. The silica gel hose has stronger high-temperature resistance and longer service life, but has higher cost.

[0030] The vacuum tank assembly 5 is used for storing the vacuum source input by the vacuum pump assembly 3, stabilizing the vacuum degree of the system, reducing the working frequency of the vacuum pump assembly 3, prolonging the service life and reducing the energy consumption. At the same time, when the automobile is braked urgently, the vacuum tank can quickly release the stored vacuum source and input to the vacuum booster and master cylinder assembly 6, so as to amplify the force of the driver stepping on the brake pedal.

[0031] The vacuum booster and master cylinder assembly 6 includes a vacuum booster and a master cylinder. The vacuum booster amplifies the force of the driver stepping on the brake pedal through the vacuum source input by the vacuum pump assembly 3 or the vacuum tank assembly 5, so as to reduce the force required by the driver. The master cylinder converts the force of the brake pedal into hydraulic pressure, and transmits the hydraulic pressure to the wheel cylinder through the brake pipeline, so as to push the brake pad to rub the brake disc, and realize the braking of the vehicle.

[0032] The driver controls the automobile braking through the brake pedal assembly 7.

[0033] The connecting relationship of the utility model is described below.

[0034] The output end of the pipeline air pressure sensor is connected to the input end of the vehicle controller, the output end of the vehicle controller is connected to the input end of the vacuum pump assembly 3 through a CAN bus or a LIN bus, the output end of the vacuum pump assembly 3 is connected to the pipeline assembly 4 through a one-way valve, the pipeline assembly 4 is connected to the vacuum tank assembly 5, and the pipeline assembly 4 is connected to the vacuum booster assembly with the master cylinder assembly 6 through a one-way valve.

[0035] The connection between the pipeline assembly 4 and the vacuum valve assembly, the connection between the pipeline assembly 4 and the one-way valve, the connection between the pipeline assembly 4 and the vacuum tank assembly 5 and the connection between the pipeline assembly 4 and the vacuum booster are all sealed designs, so as to ensure the air tightness of the connection, and the sealed design can be specifically implemented by adopting an o-ring or a conical sealing structure.

[0036] The working process of the control system of the vacuum pump assembly 3 of the utility model is described in detail below.

[0037] The sensor module 1 detects the air pressure in the pipeline assembly 4 and inputs the air pressure information of the pipeline assembly 4 to the control module 2. The vehicle-mounted electrical element T-BOX obtains the position information of the current vehicle through the GPS module and inputs the position information of the current vehicle to the control module 2 through a bus. The control module 2 determines the current altitude through the current position information and calculates the current atmospheric pressure. The control module 2 calculates the first threshold pressure and the second threshold pressure through the current atmospheric pressure. In the embodiment of the utility model, when the atmospheric pressure of the place where the automobile is located is greater than or equal to 700 hPa, the first threshold pressure is 0.7 times the atmospheric pressure, and the second threshold pressure is 0.5 times the atmospheric pressure; when the atmospheric pressure of the place where the automobile is located is less than 700 hPa and greater than 400 hPa, the first threshold pressure is 0.6 times the atmospheric pressure plus 45 hPa, and the second threshold pressure is 0.6 times the atmospheric pressure.

[0038] When the air pressure of the pipeline assembly 4 is greater than the first threshold pressure, the control module 2 controls the vacuum pump assembly 3 to start. After the vacuum pump assembly 3 starts, the vacuum pump assembly 3 provides a vacuum source to the vacuum tank assembly 5 and the vacuum booster assembly with the master cylinder assembly 6 through the pipeline assembly 4. When the air pressure in the pipeline assembly 4 is less than the second threshold pressure, the control module 2 controls the vacuum pump assembly 3 to stop.

[0039] When the atmospheric pressure is low, in the embodiment of the utility model, when the atmospheric pressure is less than or equal to 400 hPa, the control module 2 controls the vacuum pump assembly 3 to adopt a control strategy of working for ten seconds after the vehicle brakes, stopping for five seconds, and then working for ten seconds, and then stopping working. The purpose is to quickly provide a vacuum source reserve, and on this basis, the intermittent design of stopping for 5 seconds can avoid overheat caused by the continuous operation of the vacuum pump assembly 3.

[0040] The technical effects of the present application are described in detail below.

[0041] The present application has low cost, does not need additional air pressure sensor, the control module 2 obtains vehicle position information through T-BOX, calculates atmospheric pressure combined with altitude, replaces traditional independent air pressure sensor, and reduces hardware cost.

[0042] The present application optimizes energy consumption, starts and stops the vacuum pump assembly 3 according to demand, the vacuum pump assembly 3 is automatically started and stopped according to the comparison result of pipeline air pressure and dynamic threshold value, works only when needed, and reduces unnecessary energy consumption. The vacuum tank assembly 5 stores vacuum source, stabilizes system vacuum degree, reduces the frequency of frequent starting of the vacuum pump assembly 3, and further reduces energy consumption.

[0043] The present application calculates altitude according to vehicle position, dynamically adjusts threshold pressure, and ensures that vacuum source can be stably provided in different air pressure environments such as plateau and plain.

[0044] In the present application, the vacuum tank assembly 5 quickly releases stored vacuum during emergency braking, enhances the brake force amplification effect of the vacuum booster, shortens the braking distance, and improves driving safety.

[0045] In the present application, a one-way valve is used at the connection between the pipeline assembly 4 and the vacuum booster with master cylinder assembly 6 and vacuum pump assembly 3, which prevents vacuum backflow and ensures system stability.

[0046] The present application is described above in conjunction with the drawings. Apparently, the specific implementation of the present application is not limited by the above method. As long as various non-essential improvements are made by using the method concept and technical solution of the present application, or the above-mentioned concept and technical solution of the present application is directly applied to other occasions without improvement, it is within the protection scope of the present application.

Claims

1. A control system for a vacuum pump assembly, characterized by: The application relates to a brake system, which comprises a sensor module, a control module, a vacuum pump assembly, a pipeline assembly, a vacuum tank assembly, a vacuum booster with master cylinder assembly and a brake pedal assembly, wherein the sensor module is used for detecting air pressure in the pipeline assembly, the output end of the sensor module is connected with the input end of the control module, the output end of the control module is connected with the input end of the vacuum pump assembly, the vacuum pump assembly is connected with the pipeline assembly, the pipeline assembly is connected with the vacuum tank assembly, the pipeline assembly is connected with the vacuum booster with master cylinder assembly, and the vacuum booster with master cylinder assembly is connected with the brake pedal assembly.

2. A control system for a vacuum pump assembly as claimed in claim 1, wherein: The sensor module inputs pressure detection information to the control module, the control module outputs control instructions to the vacuum pump assembly, the vacuum pump assembly respectively outputs vacuum to the vacuum tank and the vacuum booster with master cylinder assembly through the pipeline assembly, and the vacuum booster with master cylinder assembly outputs thrust to the brake pedal assembly.

3. A control system for a vacuum pump assembly as defined in claim 1, wherein: The sensor module adopts an air pressure sensor, and the output end of the air pressure sensor is connected with the input end of the control module.

4. A control system for a vacuum pump assembly as defined in claim 1, wherein: The control module adopts a vehicle controller.

5. A control system for a vacuum pump assembly as defined in claim 1, wherein: The vacuum pump assembly adopts an electric vacuum pump, the output end of the control module is connected with the input end of the electric vacuum pump, and the output end of the electric vacuum pump is connected with the pipeline assembly through a one-way valve.

6. A control system for a vacuum pump assembly as defined in claim 1, wherein: The pipeline assembly and the vacuum booster with master cylinder assembly are connected through a one-way valve.

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