Parking redundancy control system for drive-by-wire chassis of commercial vehicle

Abstract

The utility model belongs to the technical field of commercial vehicle parts, and particularly relates to a parking redundancy control system for a drive-by-wire chassis of a commercial vehicle. An air inlet (11) of the EPB valve module (1) is communicated with an air source pipeline (12), the air source pipeline (12) is communicated with an air supply source, a module air outlet (13) of the EPB valve module (1) is communicated with the spring parking control air chamber (3), a module fourth port (14) of the EPB valve module (1) is communicated with an electromagnetic valve second port (21) of the electromagnetic valve (2), and the electromagnetic valve (2) is further provided with an electromagnetic valve third port (22). The parking redundancy control system for the drive-by-wire chassis of the commercial vehicle is simple in structure, when an EPB cannot automatically achieve parking, automatic activation of parking braking is reliably ensured, parking braking is achieved, the emergency parking effect is achieved, safe parking of the vehicle is ensured, and the safety of the vehicle and the safety of drivers and passengers are guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of commercial vehicle parts, and more specifically, relates to a parking redundancy control system for a wire-controlled chassis of a commercial vehicle. Background Art

[0002] Under the background of the continuous development of the intelligence and electrification of commercial vehicles, the wire-controlled chassis, as the final execution end of intelligent driving commercial vehicles, plays a crucial role. Among them, the parking brake system, as the core execution layer of the wire-controlled chassis, is particularly important for the operation safety of intelligent driving vehicles. Especially for the driverless operation environments such as mining areas and ports, once a failure occurs and the vehicle's entire parking brake system malfunctions, it will seriously threaten personal and property safety. The utility model provides an electromagnetic parking safety redundancy system, which can timely and accurately stop the vehicle when the vehicle's main parking system fails, effectively ensuring the vehicle's operation safety. In most existing wire-controlled chassis for intelligent driving, the emergency parking brake system manually parks the vehicle through mechanical means such as an in-vehicle rotary valve. In the actual application process, it is necessary for a person to perform the parking operation on the moving vehicle under the vehicle, which has great potential safety hazards; or some add a set of redundant parking brake devices on the basis of the existing parking brake, and the control strategy is extremely complex, and at the same time, it greatly increases the manufacturing and use costs of the vehicle.

[0003] There is a technology with the name of "A Commercial Vehicle Electronic Parking Control System and Control Method" and the publication number of "CN108045364A" in the prior art. This technology provides a commercial vehicle electronic parking control system and its control method. The control system is: the ABS controller, the transmission controller, the engine controller, and the instrument controller are connected to the EPB controller through the CAN bus, the electronic parking memory valve is connected to the EPB controller through a hard wire, the electronic parking memory valve is connected to the energy storage spring brake cylinder, the EPB switch and the EPB controller are connected through a hard wire, and the HSA switch is connected to the EPB controller through a hard wire; the control method is: the vehicle state information that the EPB controller needs to receive; the fault diagnosis process of the EPB system; the mode switching control process of the EPB system; the "automatic mode" control process of the EPB system; the "HSA mode" control process of the EPB system; the manual control process of the EPB system; the present invention can realize automatic parking and automatic release of parking, and can also realize the function of ramp start assist. Since the output torque and speed of the engine are controlled, it is not easy to stall when starting on a ramp.

[0004] However, this technology does not involve the technical problems and technical solutions of this application. Summary of the Utility Model

[0005] The technical problem to be solved by the present utility model is: aiming at the deficiencies of the prior art, to provide a parking redundant control system for a commercial vehicle wire-controlled chassis with a simple structure, which can reliably ensure the automatic activation of the parking brake when the EPB cannot automatically achieve parking, realize the parking brake, play the role of emergency parking, ensure the safe parking of the vehicle, and guarantee the safety of the vehicle and the passengers.

[0006] To solve the above-mentioned technical problem, the technical solution adopted by the present utility model is as follows:

[0007] The present utility model is a parking redundant control system for a commercial vehicle wire-controlled chassis. The air inlet of the EPB valve module is connected to the air source pipeline, the air source pipeline is connected to the supply air source, the module air outlet of the EPB valve module is connected to the spring parking control air chamber, the fourth module port of the EPB valve module is connected to the second solenoid valve port of the solenoid valve, and the solenoid valve is also provided with a third solenoid valve port.

[0008] The fourth module port of the EPB valve module is connected to the second solenoid valve port of the solenoid valve through a solenoid valve connecting pipeline.

[0009] The module air outlet of the EPB valve module is connected to the spring parking control air chamber through a parking control air chamber connecting pipeline 33.

[0010] The spring parking control air chamber includes a first spring parking control air chamber and a second spring parking control air chamber. The module air outlet of the EPB valve module includes a first module air outlet and a second module air outlet. The solenoid valve is also provided with a third solenoid valve port.

[0011] The solenoid valve is a normally closed solenoid valve.

[0012] The circuit part of the solenoid valve is connected to the vehicle circuit.

[0013] When a fault or failure occurs in the vehicle circuit, the solenoid valve is configured to be able to switch from the normal open state of the third solenoid valve port to the open state.

[0014] The spring parking control air chamber includes a control air chamber body. The control air chamber body includes a front chamber and a rear chamber. A leather cup is arranged in the front chamber. The leather cup is connected to an air chamber push rod. A front spring is arranged between the leather cup and the front part of the control air chamber body. A storage piston is arranged in the rear chamber. A storage spring is arranged between the storage piston and the rear part of the control air chamber body. The storage piston is connected to a parking push rod.

[0015] The module air outlet of the EPB valve module is connected to the rear chamber of the spring parking control air chamber through a parking control air chamber connecting pipeline.

[0016] Adopting the technical solution of the present utility model, the working principle and beneficial effects are as follows:

[0017] The parking redundant control system for a commercial vehicle's by-wire chassis described in the present utility model improves the structure in view of the special situation where the EPB cannot automatically achieve parking control due to a failure or malfunction in the vehicle's entire electrical circuit. The fourth port of the EPB valve module is connected to the second port of the solenoid valve, and the solenoid valve is also provided with a third port. The parking brake air chamber is a spring energy storage brake air chamber, and spring energy storage braking is achieved by deflating during parking braking. When the vehicle is operating normally, the solenoid valve circuit is connected, and the valve body is in a closed state, that is, the third port of the solenoid valve is in a closed state. The second port of the solenoid valve communicates with the fourth port of the EPB valve module, and the third port of the solenoid valve is closed. At this time, the EPB valve module operates normally, and parking braking and parking release of the vehicle are achieved through the EPB valve module. When a failure or malfunction occurs in the circuit, resulting in the inability of the EPB to automatically achieve parking, at this time, the solenoid valve is open due to a circuit failure, and the fourth port of the EPB valve module and the compressed air in the pipeline are discharged from the third port of the solenoid valve, achieving the discharge of the gas in the spring parking control air chamber, and the parking brake is automatically activated to achieve emergency parking braking, thus ensuring the vehicle can park safely and playing the role of emergency parking. The parking redundant control system for a commercial vehicle's by-wire chassis described in the present utility model has a simple structure. When the EPB cannot automatically achieve parking, it can reliably ensure that the parking brake is automatically activated, achieve parking braking, play the role of emergency parking, ensure the vehicle can park safely, and guarantee the safety of the vehicle and the occupants. Brief Description of the Drawings

[0018] The following briefly describes the content expressed in each drawing of this specification and the markings in the drawings:

[0019] Figure 1 is a schematic structural diagram of the parking redundant control system for a commercial vehicle's by-wire chassis described in the present utility model;

[0020] The markings in the drawings are: 1. EPB valve module (EPB); 11. Air inlet; 12. Air source pipeline; 13. Module air outlet; 131. First module air outlet; 132. Second module air outlet; 14. Fourth port of the module; 2. Solenoid valve; 21. Second port of the solenoid valve; 22. Third port of the solenoid valve; 23. Solenoid valve connecting pipeline; 3. Spring parking control air chamber; 31. First spring parking control air chamber; 32. Second spring parking control air chamber; 33. Parking control air chamber connecting pipeline. Detailed Description of the Preferred Embodiment

[0021] The following further details the specific embodiments of the present utility model, such as the shapes, structures, mutual positions and connection relationships of the components involved, the functions of each part, and the working principles, etc., by describing the embodiments with reference to the drawings:

[0022] As shown in the attached Figure 1As shown in the figure, the utility model relates to a parking redundancy control system for a commercial vehicle by wire control chassis. The air inlet 11 of the EPB valve module 1 is connected to the air source pipeline 12, and the air source pipeline 12 is connected to the air supply source. The module air outlet 13 of the EPB valve module 1 is connected to the spring parking control air chamber 3, and the module fourth port 14 of the EPB valve module 1 is connected to the solenoid valve second port 21 of the solenoid valve 2. The solenoid valve 2 is also provided with a solenoid valve third port 22. For the deficiencies in the prior art, the above structure proposes an improved technical solution. When setting the structure, the EPB valve module 1 is set, and the EPB valve module 1 is used to control the spring parking control air chamber 3 under normal conditions. At the same time, the air inlet 11 of the EPB valve module 1 is connected to the air source pipeline 12, and the air source pipeline 12 is connected to the air supply source, and the air supply source is used for the supply of parking gas. The module air outlet 13 of the EPB valve module 1 is connected to the spring parking control air chamber 3, and the parking brake is controlled through the spring parking control air chamber 3. For the special situation that the EPB cannot automatically achieve parking control due to a failure or malfunction of the vehicle's entire circuit, the structure is improved. The module fourth port 14 of the EPB valve module 1 is connected to the solenoid valve second port 21 of the solenoid valve 2, and the solenoid valve 2 is also provided with a solenoid valve third port 22. The parking brake air chamber is a spring energy storage brake air chamber, and the spring energy storage brake is realized by deflating during parking braking. When the vehicle is working normally, the solenoid valve 2 circuit is connected, and the valve body is in a closed state, that is, the solenoid valve third port 22 is in a closed state. The solenoid valve second port 21 of the solenoid valve 2 communicates with the module fourth port of the EPB valve module 4, and the solenoid valve third port 22 is closed. At this time, the EPB valve module 1 works normally, and the parking brake and parking release of the vehicle are realized through the EPB valve module 1. When a circuit failure or malfunction occurs, it will cause the EPB valve module 1 to be unable to automatically achieve parking. At this time, the solenoid valve is open due to a circuit failure, and the solenoid valve third port 22 will open. At this time, the module fourth port 14 of the EPB valve module and the compressed air in the pipeline are discharged from the solenoid valve third port 22, realizing the discharge of the gas in the spring parking control air chamber 3, and the parking brake is automatically activated to realize emergency parking braking, thus ensuring the safe parking of the vehicle and playing the role of emergency parking. The parking redundancy control system for a commercial vehicle by wire control chassis described in the utility model has a simple structure. When the EPB cannot automatically achieve parking, it can reliably ensure that the parking brake is automatically activated, realize parking braking, play the role of emergency parking, ensure the safe parking of the vehicle, and ensure the safety of the vehicle and the passengers.

[0023] The module fourth port 14 of the EPB valve module 1 is connected to the solenoid valve second port 21 of the solenoid valve 2 through a solenoid valve connecting pipeline 23. In the above structure, the solenoid valve connecting pipeline 23 is a flexible hose, which reliably connects the module fourth port 14 and the solenoid valve second port 21 to realize gas transmission.

[0024] The module air outlet 13 of the EPB valve module 1 is connected to the spring parking control air chamber 3 through the parking control air chamber connecting pipeline 33. The parking control air chamber connecting pipeline 33 is a hose, which reliably connects the module air outlet 13 and the spring parking control air chamber 3 to realize gas transmission.

[0025] The spring parking control air chamber 3 includes a first spring parking control air chamber 31 and a second spring parking control air chamber 32. The module air outlet 13 of the EPB valve module 1 includes a first module air outlet 131 and a second module air outlet 132. In the above structure, the number of the spring parking control air chambers 3 and the module air outlets 13 are correspondingly set, and the number of the spring parking control air chambers 3 and the module air outlets 13 is not limited to two, and the number can be selected according to the actual situation of the vehicle.

[0026] The solenoid valve 2 is a normally closed solenoid valve. The circuit part of the solenoid valve 2 is connected to the vehicle circuit. When a fault or failure occurs in the vehicle circuit, the solenoid valve 2 is configured to be able to switch from the open state of the third solenoid valve port 22 in the normal state to the open state. In the above structure, since the solenoid valve 2 is a normally closed solenoid valve, the solenoid valve will not open when the EPB valve module 1 is working normally, and it will not affect the normal operation of the EPB valve module 1. When a fault in the vehicle circuit affects the EPB valve module 1, the solenoid valve 2 plays a role at this time. Specifically, when the solenoid valve is open due to a circuit fault, the third solenoid valve port 22 will open. At this time, the module fourth port 14 of the EPB valve module 1 and the compressed air in the pipeline are discharged from the third solenoid valve port 22, realizing the discharge of the gas in the spring parking control air chamber 3, and the parking brake is automatically activated to realize the emergency parking brake, so as to ensure the safe parking of the vehicle and play the role of emergency parking.

[0027] The spring parking control air chamber 3 includes a control air chamber body. The control air chamber body includes a front chamber and a rear chamber. A leather cup is arranged in the front chamber. The leather cup is connected to an air chamber push rod. A front spring is arranged between the leather cup and the front part of the control air chamber body. An energy storage piston is arranged in the rear chamber. An energy storage spring is arranged between the energy storage piston and the rear part of the control air chamber body. The energy storage piston is connected to a parking push rod. The module air outlet 13 of the EPB valve module 1 is connected to the rear chamber of the spring parking control air chamber 3 through the parking control air chamber connecting pipeline 33. In the above structure, the spring parking control air chamber 3 is a structure in the prior art. For the parking brake, the gas in the rear chamber is mainly controlled. When the gas in the rear chamber is discharged, under the action of the energy storage spring, the energy storage spring pushes the energy storage piston to move towards the front part of the control air chamber, pushing the parking push rod to extend to realize the parking brake and meet the vehicle requirements.

[0028] In the parking redundant control system for the wire-controlled chassis of a commercial vehicle described in the utility model, the EPB valve module 1 is used to control the spring parking control air chamber 3 under normal conditions. At the same time, the air inlet 11 of the EPB valve module 1 is connected to the air source pipeline 12, and the air source pipeline 12 is connected to the air supply source, which is used to supply parking gas. The module air outlet 13 of the EPB valve module 1 is connected to the spring parking control air chamber 3, and the parking brake is controlled by the spring parking control air chamber 3. In view of the special situation that the EPB cannot automatically realize the parking control due to a fault or failure of the vehicle circuit, a structural improvement is made, and the fourth module port 14 of the EPB valve module 1 is connected to the second solenoid valve port 21 of the solenoid valve 2, and the solenoid valve 2 is also provided with a third solenoid valve port 22. The parking brake air chamber is a spring energy storage brake air chamber, and the spring energy storage brake is realized by deflation during parking braking. When the vehicle is working normally, the circuit of the solenoid valve 2 is connected, and the valve body is in a closed state, that is, the third port 22 of the solenoid valve is in a closed state, the second port 21 of the solenoid valve 2 is connected to the fourth port of the EPB valve module 4, and the third port 22 of the solenoid valve is closed. At this time, the EPB valve module 1 works normally, and the parking brake and parking release of the vehicle are realized through the EPB valve module 1. When the circuit fails or fails, it will cause the EPB valve module 1 to be unable to automatically realize parking. At this time, the solenoid valve is broken due to the circuit failure, and the third port 22 of the solenoid valve will open. At this time, the fourth port 14 of the EPB valve module and the compressed air in the pipeline are discharged from the third port 22 of the solenoid valve, and the gas in the spring parking control air chamber 3 is discharged. The parking brake is automatically activated to realize the emergency parking brake, thereby ensuring the safe parking of the vehicle and playing the role of emergency parking.

[0029] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A parking redundancy control system for a commercial vehicle by - wire chassis, characterized in that: The air inlet (11) of the EPB valve module (1) is connected to the air source pipeline (12), and the air source pipeline (12) is connected to the air supply source. The module air outlet (13) of the EPB valve module (1) is connected to the spring parking control air chamber (3). The fourth module port (14) of the EPB valve module (1) is connected to the second solenoid valve port (21) of the solenoid valve (2), and the solenoid valve (2) is also provided with a third solenoid valve port (22).

2. The parking redundancy control system for a commercial vehicle by - wire chassis according to claim 1, characterized in that: The fourth module port (14) of the EPB valve module (1) is connected to the second solenoid valve port (21) of the solenoid valve (2) through the solenoid valve connecting pipeline (23).

3. The parking redundancy control system for a commercial vehicle by - wire chassis according to claim 1 or 2, characterized in that: The module air outlet (13) of the EPB valve module (1) is connected to the spring parking control air chamber (3) through the parking control air chamber connecting pipeline (33).

4. The parking redundancy control system for a commercial vehicle by - wire chassis according to claim 3, characterized in that: The spring parking control air chamber (3) includes a first spring parking control air chamber (31) and a second spring parking control air chamber (32). The module air outlet (13) of the EPB valve module (1) includes a first module air outlet (131) and a second module air outlet (132).

5. The parking redundancy control system for a commercial vehicle by - wire chassis according to claim 1 or 2, characterized in that: The solenoid valve (2) is a normally closed solenoid valve.

6. The parking redundancy control system for a commercial vehicle by - wire chassis according to claim 5, characterized in that: The circuit part of the solenoid valve (2) is connected to the vehicle circuit.

7. The parking redundancy control system for a commercial vehicle by - wire chassis according to claim 6, characterized in that: When a fault or failure occurs in the vehicle circuit, the solenoid valve (2) is configured to be able to switch from the open state of the normal third solenoid valve port (22) to the open state.

8. The parking redundancy control system for a commercial vehicle by - wire chassis according to claim 1 or 2, characterized in that: The spring parking control air chamber (3) includes a control air chamber body. The control air chamber body includes a front chamber and a rear chamber. A leather cup is arranged in the front chamber. The leather cup is connected to the air chamber push rod. A front spring is arranged between the leather cup and the front part of the control air chamber body. A storage piston is arranged in the rear chamber. A storage spring is arranged between the storage piston and the rear part of the control air chamber body. The storage piston is connected to the parking push rod.

9. The parking redundancy control system for a commercial vehicle by - wire chassis according to claim 3, characterized in that: The module air outlet (13) of the EPB valve module (1) is connected to the rear chamber of the spring parking control air chamber (3) through the parking control air chamber connecting pipeline (33).

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