Electromechanical brake and air brake train brake control system and method

Abstract

The application discloses an electric control mechanical brake and air brake train brake control system and method, which comprises a brake signal generator, an EPB switch, an EMB controller, an EMB electric push rod assembly, a wheel brake, a trailer controller, a trailer actuating valve, an air pressure sensor, a trailer valve, an air cylinder, an air compressor, a red / yellow spiral air pipe electric connection line and a trailer air pressure brake system; the EMB controller is electrically connected with the brake signal generator and the EPB switch respectively, and the EMB controller controls the wheel brake through the EMB electric push rod assembly; the trailer controller is electrically connected with the brake signal generator, the EPB switch, the trailer actuating valve and the air pressure sensor respectively; the trailer actuating valve is electrically connected with the air pressure sensor, the trailer actuating valve and the trailer valve are connected through a pipeline, and the trailer valve is electrically connected with the trailer air pressure brake system through the red / yellow spiral air pipe electric connection line; and the air compressor is connected with the trailer actuating valve through the air cylinder.

Description

Technical Field

[0001] This invention belongs to the field of automotive braking, specifically relating to an electromechanical braking and pneumatic braking method for automotive train braking control. Background Technology

[0002] Currently, traditional dual-circuit air-pressure braking technology remains the mainstream application technology in commercial vehicle braking systems. This solution is mature and highly versatile. With technological advancements, electromechanical braking (EMB) technology has become one of the solutions for commercial vehicle braking systems. It boasts advantages such as simple system configuration, streamlined wiring, high control precision, and fast response, and is being widely adopted in commercial vehicles.

[0003] For semi-trailer tractors, the current market mainly uses traditional pneumatic braking technology. The application of electromechanical braking (EMB) on semi-trailers is still in the pre-research stage and there are no actual vehicle applications yet. Therefore, when the tractor uses electromechanical braking (EMB), the trailer using pneumatic braking needs to be matched with the braking technology described in this application for both the tractor and the semi-trailer.

[0004] Existing commercial vehicles primarily rely on traditional dual-circuit pneumatic braking, which suffers from drawbacks such as a large variety of system components, complex pipeline connections, difficult layout, and high noise levels. Furthermore, the upgrade and iteration of semi-trailer systems is relatively slow. Therefore, for the foreseeable future, the solution of using EMB braking technology in the tractor unit and pneumatic braking in the trailer for vehicle-trailer combinations will remain the preferred option in the market. Summary of the Invention

[0005] The purpose of this invention is to provide a braking control method for vehicle trains using both electromechanical and pneumatic braking, satisfying the braking coordination control technology for vehicle trains where the tractor uses electromechanical braking and the semi-trailer uses pneumatic braking. The main focus is on solving the braking performance control and tractor-trailer coordination issues when the tractor is used in conjunction with the pneumatic braking of the trailer.

[0006] To address the aforementioned problems in the existing technology, the technical solution adopted by this invention is as follows:

[0007] An electromechanical braking and pneumatic braking vehicle train braking control system includes: a brake signal generator, an EPB switch, an EMB controller, an EMB electric actuator assembly, wheel-side brakes, a trailer controller, a trailer actuation valve, a pneumatic sensor, a trailer valve, an air tank, an air compressor, red / yellow spiral air hose electrical connection wires, and a trailer pneumatic braking system.

[0008] The EMB controller is electrically connected to the brake signal generator and the EPB switch respectively. The EMB controller controls the wheel-side brake through the EMB electric actuator assembly.

[0009] The trailer controller is electrically connected to the brake signal generator, EPB switch, trailer actuation valve and air pressure sensor respectively;

[0010] The trailer actuation valve is electrically connected to the air pressure sensor. The trailer actuation valve and the trailer valve are connected by a pipeline. The trailer valve is electrically connected to the trailer air pressure braking system through a red / yellow spiral air pipe electrical connection wire.

[0011] The air compressor is connected to the trailer actuation valve via an air storage tank.

[0012] A method for controlling the braking of a vehicle-trailer combination of electromechanical and pneumatic braking includes a tractor braking method and a semi-trailer braking method.

[0013] The braking method for the tractor vehicle includes the following steps:

[0014] Step 1A: The brake signal generator generates a first voltage signal based on the travel of the brake pedal and transmits the first voltage signal to the EMB controller;

[0015] Step 2A: The EMB controller controls the EMB electric actuator assembly to output thrust based on the first voltage signal, thereby actuating the wheel-side brakes to generate braking torque and apply braking force to the vehicle.

[0016] Furthermore, in step 2A, the EMB controller detects the braking deceleration A of the tractor, compares the required deceleration value with the actual braking deceleration value, and adjusts the thrust output of the EMB electric actuator assembly according to the control algorithm, thereby realizing the braking control of the tractor. There is a linear correspondence between the stroke of the brake signal generator and the vehicle deceleration A. This correspondence can be calibrated and determined according to the vehicle type, etc., to ensure that the vehicle braking system is more reasonably adapted. The electrical signal emitted by the EPB switch is similar to the working process of the brake signal generator mentioned above. Normally, the EPB switch only has two states: maximum braking and contact braking. In emergency braking, the EPB switch can also perform linear control of the brake.

[0017] Furthermore, the semi-trailer braking method includes the following steps:

[0018] Step 1B: The brake signal generator generates a second voltage signal based on the travel of the brake pedal and transmits the second voltage signal to the trailer controller;

[0019] Step 2B: The trailer controller calculates the brake air pressure based on the second voltage signal and controls the trailer actuation valve to be energized. The trailer actuation valve controls the trailer valve to generate air pressure output, thereby realizing the control of the trailer air pressure braking system.

[0020] Furthermore, in step 2B, the air pressure sensor in the pipeline monitors the output air pressure value of the trailer actuation valve and sends the actual air pressure to the trailer controller. The trailer controller compares the required air pressure value with the actual air pressure value according to an algorithm, thereby achieving precise control of the trailer brake. The EPB switch controls the trailer brake in a basically the same way as described above.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. This invention employs an EMB braking system, which features a simple system structure, easy pipeline connections, high control precision, fast response speed, and high comfort. This improves overall vehicle braking safety.

[0023] 2. The trailer of this invention adopts mature air pressure braking technology, which does not require modification to the trailer. It can be universally matched and applied, with strong applicability, and can quickly realize the market promotion and application of EMB technology for tractor vehicles.

[0024] 3. The trailer air brake of this invention adopts electronic air brake technology, which improves the system control accuracy.

[0025] 4. The present invention simplifies the calibration of the main trailer coordination control, and reduces hardware dependence by conducting relevant parameter calibration tests. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the braking coordination control technology of the present invention;

[0027] Figure 2 This is a flowchart of the tractor braking control and braking force magnitude control of the present invention;

[0028] Figure 3 This is a flowchart of the tractor braking control and braking force magnitude control of the present invention.

[0029] In the diagram: 1-Brake signal generator; 2-EPB switch; 3-EMB controller; 4-EMB electric actuator assembly; 5-Wheel-side brake; 6-Trailer controller; 7-Trailer actuation valve; 8-Air pressure sensor; 9-Trailer valve; 10-Air tank; 11-Air compressor; 12-Red / yellow spiral air hose electrical connection wire; 13-Trailer air pressure braking system. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and reference numerals.

[0031] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0032] The terms “first,” “second,” “third,” etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0033] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0035] Example 1:

[0036] like Figure 1 As shown, an electromechanical braking and air braking vehicle train braking control system includes: a brake signal generator 1, an EPB switch 2, an EMB controller 3, an EMB electric actuator assembly 4, wheel-side brakes 5, a trailer controller 6, a trailer actuation valve 7, an air pressure sensor 8, a trailer valve 9, an air tank 10, an air compressor 11, a red / yellow spiral air pipe electrical connection wire 12, and a trailer air pressure braking system 13.

[0037] The EMB controller 3 is electrically connected to the brake signal generator 1 and the EPB switch 2 respectively. The EMB controller 3 controls the wheel-side brake 5 through the EMB electric actuator assembly 4.

[0038] The trailer controller 6 is electrically connected to the brake signal generator 1, EPB switch 2, trailer actuation valve 7 and air pressure sensor 8 respectively.

[0039] The trailer actuation valve 7 is electrically connected to the air pressure sensor 8. The trailer actuation valve 7 and the trailer valve 9 are connected by a pipeline. The trailer valve 9 is electrically connected to the trailer air pressure braking system 13 through the red / yellow spiral air pipe electrical connection wire 12.

[0040] The air compressor 11 is connected to the trailer actuation valve 7 via the air storage tank 10.

[0041] Example 2:

[0042] like Figure 2 and 3 As shown, a method for controlling the braking of a vehicle-trailer combination of electromechanical and pneumatic braking includes a tractor braking method and a semi-trailer braking method.

[0043] The braking method for the tractor vehicle includes the following steps:

[0044] Step 1A: The brake signal generator 1 generates a first voltage signal based on the travel of the brake pedal and transmits the first voltage signal to the EMB controller 3;

[0045] Step 2A: The EMB controller 3 controls the EMB electric actuator assembly 4 to output thrust according to the first voltage signal, thereby actuating the wheel-side brake 5 to generate braking torque and apply braking force to the vehicle.

[0046] Example 3:

[0047] Based on Example 2, in step 2A, the EMB controller 3 detects the magnitude of the braking deceleration A of the tractor, compares the required deceleration magnitude with the actual braking deceleration magnitude, and adjusts the thrust output of the EMB electric actuator assembly 4 according to the control algorithm, thereby realizing the braking control of the tractor.

[0048] There is a linear correspondence between the stroke of the brake signal generator 1 and the vehicle deceleration A. This correspondence can be calibrated and determined according to the vehicle type, etc., to ensure that the vehicle braking system is more reasonably adapted.

[0049] The electrical signal emitted by EPB switch 2 is similar to the working process of the brake signal generator 1 mentioned above. Normally, EPB switch has only two states: maximum braking and contact braking. In emergency braking, EPB switch 2 can also perform linear control of braking.

[0050] The semi-trailer braking method includes the following steps:

[0051] Step 1B: The brake signal generator 1 generates a second voltage signal based on the travel of the brake pedal and transmits the second voltage signal to the trailer controller 6;

[0052] Step 2B: The trailer controller 6 calculates the braking air pressure based on the second voltage signal and controls the trailer actuation valve 7 to be energized. The trailer actuation valve 7 controls the trailer valve 9 to generate air pressure output, thereby realizing the control of the trailer air pressure braking system 13.

[0053] In step 2B, the air pressure sensor 8 in the pipeline monitors the output air pressure value of the trailer actuation valve 7 and sends the actual air pressure to the trailer controller 6. The trailer controller 6 compares the required air pressure value with the actual air pressure value according to the algorithm, thereby achieving precise control of the trailer braking.

[0054] The control of trailer braking by EPB switch 2 is basically the same as the process described above.

[0055] This invention is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this invention. However, regardless of any changes made in their shape or structure, any technical solution that falls within the scope of the claims of this invention shall be protected by this invention.

Claims

1. An electromechanical braking and pneumatic braking control system for automobile trains, characterized in that: include: Brake signal generator (1), EPB switch (2), EMB controller (3), EMB electric actuator assembly (4), wheel-side brake (5), trailer controller (6), trailer actuation valve (7), air pressure sensor (8), trailer valve (9), air tank (10), air compressor (11), red / yellow spiral air hose electrical connection wire (12) and trailer air pressure braking system (13); The EMB controller (3) is electrically connected to the brake signal generator (1) and the EPB switch (2) respectively. The EMB controller (3) controls the wheel-side brake (5) through the EMB electric actuator assembly (4). The trailer controller (6) is electrically connected to the brake signal generator (1), EPB switch (2), trailer actuation valve (7) and air pressure sensor (8) respectively; The trailer actuation valve (7) is electrically connected to the air pressure sensor (8), the trailer actuation valve (7) and the trailer valve (9) are connected by a pipeline, and the trailer valve (9) is electrically connected to the trailer air pressure braking system (13) through the red / yellow spiral air pipe electrical connection wire (12); The air compressor (11) is connected to the trailer actuation valve (7) via an air tank (10).

2. The control method based on the electromechanical braking and pneumatic braking vehicle train braking control system as described in claim 1, characterized in that: This includes braking methods for tractor units and semi-trailer units. The braking method for the tractor vehicle includes the following steps: Step 1A: The brake signal generator (1) generates a first voltage signal based on the travel of the brake pedal and transmits the first voltage signal to the EMB controller (3); Step 2A: The EMB controller (3) controls the EMB electric actuator assembly (4) to output thrust according to the first voltage signal, thereby actuating the wheel-side brake (5) to generate braking torque and apply braking force to the vehicle; The semi-trailer braking method includes the following steps: Step 1B: The brake signal generator (1) generates a second voltage signal based on the travel of the brake pedal and transmits the second voltage signal to the trailer controller (6); Step 2B: The trailer controller (6) calculates the braking air pressure based on the second voltage signal and controls the trailer actuation valve (7) to be energized. The trailer actuation valve (7) controls the trailer valve (9) to generate air pressure output, thereby realizing the control of the trailer air pressure braking system (13).

3. The method for controlling the braking of automobile trains using electromechanical braking and pneumatic braking according to claim 2, characterized in that: In step 2A, the EMB controller (3) detects the magnitude of the braking deceleration A of the tractor, compares the required deceleration magnitude with the actual braking deceleration magnitude, and adjusts the thrust output of the EMB electric actuator assembly (4) to achieve braking control of the tractor.

4. The method for controlling the braking of automobile trains using electromechanical braking and pneumatic braking according to claim 2, characterized in that: In step 1A, there is a linear correspondence between the stroke of the brake signal generator (1) and the vehicle deceleration A. This correspondence is calibrated and determined according to the vehicle type, etc., to ensure that the vehicle braking system is more reasonably adapted.

5. The method for controlling the braking of automobile trains using electromechanical braking and pneumatic braking according to claim 2, characterized in that: In step 2B, the air pressure sensor (8) in the pipeline monitors the output air pressure value of the trailer actuation valve (7) and sends the actual air pressure to the trailer controller (6). The trailer controller (6) compares the required air pressure value with the actual air pressure value to achieve precise control of the trailer braking.

Images