An electric control pneumatic braking device, control method, equipment and terminal of a four-axle vehicle

Abstract

The application belongs to the technical field of automobile braking, and discloses a four-axle vehicle electric control pneumatic braking device, a control method, equipment and a terminal, which comprises a running brake gas circuit and a parking brake gas circuit; two main gas circuits of the running brake gas circuit are respectively provided with proportional valves on the parking brake gas circuit, the proportional valves are connected with an automobile ECU through relays; the proportional valves replace the original control part with proportional electromagnets on the basis of common pressure valves, flow valves and direction valves, and continuously and proportionally control the pressure, flow or direction of the gas according to the input electrical signal. The application can meet the braking requirements of the automobile under manual control, and can also meet the braking requirements of the vehicle under program control. Under program control, the priority of manual control of the braking system is higher than that of program control, so that the vehicle can be manually controlled for braking in the case of program control failure, thereby ensuring the driving safety of the vehicle.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automobile braking, and particularly relates to a four-axle vehicle electric control pneumatic braking device, a control method, equipment and a terminal. BACKGROUND

[0002] At present, large engineering vehicles have the characteristics of large carrying capacity and multiple axles. The design difficulty of the braking system is increased due to the large number of axles. Some braking systems only apply the braking device of two-axle vehicles to multi-axle vehicles, and cannot brake according to the dynamics of the vehicle. The braking system of some multi-axle vehicles increases the number of air cylinders and air valves to achieve the required braking effect, which meets the actual demand, but greatly increases the use and maintenance cost. If the traditional traction rope or electric push rod modification scheme is used, it will cause slow motor control speed, low control precision, and control jittering and other problems. It has become an urgent problem to design a braking system that can meet the braking needs of multi-axle vehicles and reduce costs.

[0003] With the development of intelligent vehicles, the intelligent design and application of multi-axle vehicles have also become a hot topic. It is necessary to design an intelligent vehicle pneumatic braking system that can be electrically controlled and meet the priority of manual braking in order to realize automatic driving of the vehicle.

[0004] Through the above analysis, the problems and defects of the prior art are that the safety of the existing multi-axle vehicle pneumatic braking system is poor.

[0005] The difficulty of solving the above problems and defects is that the pneumatic braking process of multi-axle vehicles is relatively complex, and how to realize electric control and meet the demand of automatic driving without affecting the braking control of manual driving is a challenging problem.

[0006] The significance of solving the above problems and defects is to design an electric braking system that can meet the automatic driving without changing the braking effect of manual driving, and meet the realization of the braking function in the automatic driving process of multi-axle vehicles. SUMMARY

[0007] In view of the problems existing in the prior art, the application provides a four-axle vehicle electric control pneumatic braking device, a control method, equipment and a terminal.

[0008] The application is implemented as follows: a four-axle vehicle electric control pneumatic braking device comprises:

[0009] A service brake gas circuit and a parking brake gas circuit;

[0010] Two main gas circuits of the service brake gas circuit and the parking brake gas circuit are respectively provided with proportional valves, and the proportional valves are connected with an automobile ECU through a relay;

[0011] The proportional valve is used to replace the original control part with a proportional electromagnet on the basis of common pressure valve, flow valve and direction valve, and continuously and proportionally controls the pressure, flow or direction of gas according to the input electrical signal.

[0012] Further, the two main air paths of the service brake air path are respectively provided with V1 gas tanks and V2 gas tanks;

[0013] The V1 gas tank is connected with the service relay valve and the two bridges through the connecting pipeline, the proportional valve is connected between the V1 gas tank and the service relay valve through the branch pipeline, and the V1 gas tank is connected with the brake pedal through the double-circuit brake valve.

[0014] The V2 gas tank is connected with the double-circuit brake valve, the adjusting valve and the three bridges through the connecting pipeline, and the proportional valve is connected between the V2 gas tank and the adjusting valve through the branch pipeline.

[0015] Further, the parking brake air path comprises a V3 gas tank, a hand brake valve, a parking relay valve, two composite brake air chambers and a proportional valve.

[0016] The V3 gas tank is connected with the hand brake valve, the parking relay valve, one composite brake air chamber and the proportional valve through the connecting pipeline, the other end of the parking relay valve is connected with the one bridge, the two bridges and the four bridges through the other composite brake air chamber.

[0017] Further, the two main air paths of the service brake air path and the outer end of the parking brake air path are connected with the servo valve and the filter, and the outer end of the filter is connected with the air pump through the connecting pipeline.

[0018] Another object of the present application is to provide a control method of the four-axle vehicle electric control pneumatic brake device, which comprises the following steps:

[0019] Step one, in the service brake air path part, air is extracted by the air pump, compressed after passing through the filter, and then injected into the V1 gas tank, the V2 gas tank and the V3 gas tank through the servo valve;

[0020] Step two, when the brake pedal is operated, the valve core of the double-circuit brake valve is moved, the V1 gas tank and the V2 gas tank are communicated with the subsequent service relay valve and the adjusting valve, high-pressure gas enters the composite brake air chamber, pushes the air chamber valve core, and the pneumatic disc brake is braked;

[0021] Step three, in the parking brake air path, the driver controls the on-off of the air path by pulling the hand brake valve, when parking is needed, high-pressure gas enters the composite brake air chamber through the parking relay valve, and the one bridge, the two bridges and the four bridges of the vehicle have the parking brake function.

[0022] Step four, when using program control (automatic driving control, the brake signal in the process of automatic driving control is controlled by the electric signal of the proportional valve to control the brake), the brake pressure on each axle is controlled by the way of controlling the on-off of the air path through the electric signal control proportional valve, when the brake pedal receives the artificial brake information, the proportional valve is controlled by the double circuit brake valve to lose the control of the main air path, so as to realize that the artificial control of the brake system is higher than the program control.

[0023] Further, the automobile ECU controls the connection of the relay a port and the c port with the b port by the electric signal to control the enable of the proportional valve.

[0024] Another object of the present application is to provide a computer device comprising a memory and a processor, the memory storing a computer program, the computer program being executed by the processor to make the processor execute the steps of the control method of the four-axle vehicle electric control pneumatic brake device.

[0025] Another object of the present application is to provide an information data processing terminal for realizing the control method of the four-axle vehicle electric control pneumatic brake device.

[0026] Another object of the present application is to provide an automobile provided with the four-axle vehicle electric control pneumatic brake device.

[0027] Another object of the present application is to provide a multi-axle vehicle brake system provided with the four-axle vehicle electric control pneumatic brake device.

[0028] In combination with all the above technical solutions, the present application has the advantages and positive effects that the present application can meet the braking requirements of the automobile under artificial control, and can also meet the braking requirements of the vehicle under program control. Moreover, under program control, the artificial control of the brake system is still possible, that is, the priority of the artificial control of the brake system is higher than the program control. By installing a one-way proportional valve on each of the two main air paths of the brake air path and the parking air path, the electric signal control of the pneumatic brake system is realized. The proportional valve has pressure compensation performance, and the output pressure and flow can not be affected by the load change. Under the condition of not difficult to transform, the brake control can be best realized, and the vehicle can be controlled by artificial braking in the case of program control failure, so as to ensure the driving safety of the vehicle.

[0029] The modification scheme for controlling the parking pedal relative to other conventional additional motor traction ropes or electric push rods has many advantages. The scheme realizes complete design without modification of the parking pedal, can make the driver have the same driving experience as before modification in the manual driving mode, improves the adaptability of the driver to the modified vehicle and the man-machine control comfort. In the program control mode, the air pressure in the pipeline can be adjusted by adjusting the opening degree of the proportional valve through the electric signal. The pressure sensor can be installed on the pipeline to realize the closed loop of pressure control. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0031] Figure 1 is the structure connection principle diagram of the four-axle vehicle electric control pneumatic braking device provided by the embodiments of the present application.

[0032] Figure 2 is the control principle diagram of the proportional valve provided by the embodiments of the present application.

[0033] In the figure: 1, air pump; 2, filter; 3, servo valve; 4, V1 gas tank; 5, V2 gas tank; 6, V3 gas tank; 7, one axle; 8, two axle; 9, four axle; 10, brake pedal; 11, double circuit brake valve; 12, driving relay valve; 13, regulating valve; 14, composite brake chamber; 15, push chamber valve core; 16, pneumatic disc brake; 17, hand brake valve; 18, parking relay valve; 19, composite brake chamber; 20, proportional valve; 21, automobile ECU; 22, relay. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present application more clear and obvious, the present application will be further described in detail below in combination with embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the present application.

[0035] In view of the problems existing in the prior art, the present application provides a four-axle vehicle electric control pneumatic braking device, a control method, equipment and a terminal, which will be described in detail below in combination with the drawings.

[0036] As Figure 1As shown, the four-axle vehicle electric control pneumatic brake device provided by the embodiment of the application mainly includes two parts of service brake and parking brake. In the service brake air path part, air is first extracted by the air pump 1, compressed after passing through the filter 2, and then injected into the V1 air tank 4, the V2 air tank 5 and the V3 air tank 6 through the servo valve 3. The V1 air tank 4 controls the braking of the first axle 7 and the second axle 8, and the V2 air tank 5 controls the braking of the fourth axle 9. The redundant design ensures that the vehicle still has a certain braking capacity if the vehicle braking air path fails, thereby avoiding the occurrence of unexpected dangers.

[0037] The brake pedal 10 controls the double-circuit brake valve 11. When the brake pedal is operated, the valve core of the double-circuit brake valve can be moved to allow the V1 air tank 4 and the V2 air tank 5 to communicate with the subsequent service brake relay valve 12 and the regulating valve 13, so that high-pressure gas enters the composite brake chamber 14, pushes the chamber valve core 15, and makes the pneumatic disc brake 16 brake. The regulating valve 13 installed in the air path of the fourth axle 9 can realize the function that the fourth axle 9 brakes first when the vehicle brakes and the fourth axle 9 is released last when the brake is released, which conforms to the logic of the vehicle braking sequence and ensures the braking safety of the vehicle.

[0038] In the parking brake air path, air is first extracted by the air pump 1, compressed and injected into the V3 air tank 6 after passing through the filter 2. The driver controls the on-off of the air path by pulling the hand brake valve 17. When parking is needed, high-pressure gas enters the composite brake chamber 19 through the parking brake relay valve 18, and the first axle 7, the second axle 8 and the fourth axle 9 of the vehicle have the parking brake function. According to the structure of the composite brake chamber 19 and the design of the air chamber entered by the service brake air path and the parking brake air path, the priority of the parking brake air path is higher than that of the service brake, so the reliability of the vehicle parking can be ensured.

[0039] When the program control is adopted, the brake pressure on each axle is controlled by controlling the on-off of the air path through the electric signal control of the proportional valve 20. When the brake pedal 10 receives the manual brake information, the proportional valve 20 loses the control of the main air path through the double-circuit brake valve 11, so as to realize that the manual control of the brake system is higher than the program control.

[0040] As shown in the figure, Figure 2 The automobile ECU 21 controls the proportional valve 20 through the relay 22. The automobile ECU controls the connection of the a port and the c port of the relay 22 with the b port through the electric signal, so as to control the enable of the proportional valve and the pneumatic brake system of the automobile.

[0041] In the description of the application, unless otherwise specified, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0042] It should be noted that the embodiments of the present application can be realized by hardware, software or a combination of software and hardware. The hardware part can be realized by special logic; the software part can be stored in a memory and executed by a suitable instruction execution system, such as a microprocessor or a specially designed hardware. Those skilled in the art can understand that the above-mentioned devices and methods can be realized by computer executable instructions and / or included in processor control code, such as provided on a carrier medium, such as a magnetic disk, CD or DVD-ROM, a programmable memory, such as a read-only memory (firmware), or a data carrier, such as an optical or electronic signal carrier. The devices of the present application and their modules can be realized by hardware circuit, such as ultra-large-scale integrated circuit or gate array, semiconductor, such as logic chip, transistor, etc., or programmable hardware device, such as field programmable gate array, programmable logic device, etc., or by software executed by various types of processors, or by a combination of the above hardware circuit and software, such as firmware.

[0043] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any modification, equivalent replacement and improvement made by those skilled in the art within the technical range disclosed by the present application, within the spirit and principle of the present application, should be covered within the protection scope of the present application.

Claims

1. A control method of an electrically controlled pneumatic brake device of a four-wheel vehicle, characterized by, The four-axle vehicle electric control pneumatic brake device comprises: a service brake gas circuit and a parking brake gas circuit; two main gas circuits of the service brake gas circuit are respectively provided with proportional valves, and the proportional valves are connected with the automobile ECU through relays; the proportional valve is used to replace the original control part on the basis of the ordinary pressure valve, flow valve and direction valve, and the pressure, flow or direction of the gas is continuously and proportionally controlled according to the input electrical signal; the two main gas circuits of the service brake gas circuit are respectively provided with V1 gas tanks and V2 gas tanks; the V1 gas tank is connected with the service brake relay valve and the second axle through the connecting pipeline, the proportional valve is connected between the V1 gas tank and the service brake relay valve through the branch pipeline, and the V1 gas tank is connected with the brake pedal through the double-circuit brake valve; the V2 gas tank is connected with the double-circuit brake valve, the adjusting valve and the third axle through the connecting pipeline, and the proportional valve is connected between the V2 gas tank and the adjusting valve through the branch pipeline; the parking brake gas circuit comprises a V3 gas tank, a hand brake valve, a parking brake relay valve, two composite brake chambers and a proportional valve; the V3 gas tank is connected with the hand brake valve, the parking brake relay valve, one composite brake chamber and the proportional valve through the connecting pipeline, and the other end of the parking brake relay valve is connected with the first axle, the second axle and the fourth axle through the other composite brake chamber; the two main gas circuits of the service brake gas circuit and the outer end of the parking brake gas circuit are connected with the filter through the servo valve, and the outer end of the filter is connected with the air pump through the connecting pipeline; the control method of the four-axle vehicle electric control pneumatic brake device comprises: step one, in the service brake gas circuit part, the air is extracted by the air pump, compressed after passing through the filter, and then injected into the V1 gas tank, the V2 gas tank and the V3 gas tank through the servo valve; step two, when the brake pedal is operated, the valve core of the double-circuit brake valve is moved, the V1 gas tank and the V2 gas tank are communicated with the subsequent service brake relay valve and the adjusting valve, the high-pressure gas enters the composite brake chamber, the chamber valve core is pushed, and the pneumatic disc brake is braked; step three, in the parking brake gas circuit, the driver controls the on-off of the gas circuit by pulling the hand brake valve, when parking is needed, the high-pressure gas enters the composite brake chamber through the parking brake relay valve, and the first axle, the second axle and the fourth axle of the vehicle have the parking brake function; step four, when the program control is adopted, the brake pressure on each axle is controlled by controlling the on-off of the gas circuit through the proportional valve controlled by the electrical signal, when the brake pedal receives the manual brake information, the proportional valve is controlled by the double-circuit brake valve to lose the control of the main gas circuit, so that the manual control of the brake system is higher than the program control.

2. The control method of the electric control pneumatic brake device of the four-axle vehicle according to claim 1, characterized by, The automobile ECU controls the connection of the relay a port and the c port and the b port through the electrical signal to control the enablement of the proportional valve.

3. A computer device, comprising: The computer device comprises a memory and a processor, the memory stores a computer program, and the computer program is executed by the processor to make the processor execute the steps of the control method of the four-axle vehicle electric control pneumatic brake device.

4. An information data processing terminal, characterized by The information data processing terminal is used to realize the control method of the four-axle vehicle electric control pneumatic brake device.

5. An automobile characterized by comprising: The automobile is equipped with a four-axle vehicle electric control pneumatic brake device controlled by the control method in claim 1.

6. A multi-axle vehicle brake system characterized by, The multi-axle vehicle brake system is equipped with a four-axle vehicle electric control pneumatic brake device controlled by the control method in claim 1.

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