A dual circuit line control brake module

Abstract

The utility model discloses a kind of double-loop line control brake modules, including first shuttle valve, pressure sensor and two brake oil circuits, hydraulic brake valve is arranged in the brake oil circuit, the first shuttle valve is with door type shuttle valve, and two input ports of the first shuttle valve are respectively connected with the working oil port of hydraulic brake valve in two brake oil circuits, the pressure sensor is arranged at the output port of the first shuttle valve, for measuring the liquid pressure at first shuttle valve output port;In middle position, the output port of the first shuttle valve is in the conduction state with two input ports;In left position or right position, the output port of the first shuttle valve is in the conduction state with the input port of low pressure side, and the input port of high pressure side is in the cut-off state.The utility model can meet the monitoring demand to the lowest output brake pressure, and reduce the use quantity of pressure sensor and its corresponding electrical connection demand, reduce material cost, promote the lightweight and economic of brake control system architecture.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic braking technology, and in particular to a dual-loop control braking module. Background Technology

[0002] In the online control system of a vehicle's hydraulic braking system, the electro-proportional brake valve plays a crucial role in converting driver input signals into hydraulic outputs, precisely regulating the hydraulic braking pressure during driving. To ensure the effectiveness of the braking control system, a pressure sensor is typically installed at the output port of the brake valve to monitor the brake output pressure in real time. This sensor triggers an alarm and implements intervention measures when the brake output pressure falls below a preset threshold, preventing brake failure due to abnormal pressure.

[0003] However, existing braking control systems often employ two relatively independent control circuits to enhance system fault tolerance and ensure high reliability and redundancy. In this case, each control circuit requires an independent pressure sensor, a matching signal transmission line, and a controller interface. This not only increases the system's material costs and manufacturing complexity but also occupies controller interface resources, potentially leaving other more critical electronic components without interfaces. This restricts system upgrades and expansions, ultimately impacting overall vehicle performance and user experience. Utility Model Content

[0004] The purpose of this invention is to provide a dual-circuit control braking module to reduce the number of pressure sensors used without compromising the minimum pressure monitoring requirements.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A dual-circuit control braking module includes a first shuttle valve, a pressure sensor, and two brake oil circuits. The brake oil circuits are equipped with hydraulic brake valves. The two input ports of the first shuttle valve are respectively connected to the working oil ports of the hydraulic brake valves in the two brake oil circuits. The pressure sensor is located at the output port of the first shuttle valve and is used to measure the liquid pressure at the output port of the first shuttle valve. The first shuttle valve is an AND gate type shuttle valve; in the neutral position, the output port of the first shuttle valve is connected to both input ports; in the left or right position, the output port of the first shuttle valve is connected to the input port on the low-pressure side, and the input port on the high-pressure side is in a throttling state.

[0006] Furthermore, the hydraulic brake valve is a three-position three-way solenoid valve; in the left position, the oil inlet of the hydraulic brake valve is in a throttling state, and the oil return port and the working oil port are in a conducting state; in the middle position, the oil inlet, oil return port and the working oil port of the hydraulic brake valve are all in a throttling state; in the right position, the oil inlet and the working oil port of the hydraulic brake valve are in a conducting state, and the oil return port is in a throttling state.

[0007] Furthermore, the hydraulic brake valve is a proportional electromagnetic valve.

[0008] Furthermore, the return ports of the hydraulic brake valves in the two brake oil circuits are connected.

[0009] Furthermore, the hydraulic brake valve is a normally closed solenoid valve, and the first shuttle valve is a normally open solenoid valve.

[0010] Furthermore, the first shuttle valve is a hydraulically piloted pressure-controlled solenoid valve.

[0011] Furthermore, a second shuttle valve is provided in the brake oil circuit. One input port of the second shuttle valve is used to obtain the foot brake pressure of the vehicle, and the other input port is connected to the working oil port of the hydraulic brake valve. The output port of the second shuttle valve can output pressure to the vehicle brake caliper.

[0012] This utility model has the following beneficial effects: This invention utilizes the switching characteristics of the first shuttle valve to simultaneously monitor the minimum output braking pressure of two relatively independent braking oil circuits using a single pressure sensor, while maintaining the minimum pressure monitoring requirements. This ensures the reduction of the number of pressure sensors and their corresponding electrical connection requirements, thereby reducing material costs and promoting a lightweight and economical braking control system architecture. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Explanation of main component symbols: 1. First shuttle valve; 2. Pressure sensor; 3. Hydraulic brake valve; 4. Second shuttle valve; B. Working port; P. Inlet port; T. Return port; L. Leakage port; MB. First shuttle valve output port; C. Second shuttle valve output port. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0016] This utility model discloses a dual-circuit control braking module, including a first shuttle valve 1, a pressure sensor 2, and two braking oil circuits.

[0017] Hydraulic brake valves 3 are installed in both relatively independent brake circuits, forming redundant control and improving the fault tolerance of the brake control system. One brake circuit has an inlet port P1, a working port B1, and a return port T, while the other brake circuit has an inlet port P2, a working port B2, and a return port T. The return ports T of the two brake circuits are connected.

[0018] The first shuttle valve 1 has two inlet ports and one outlet port MB. The two inlet ports of the first shuttle valve 1 are respectively connected to the working ports of the hydraulic brake valves 3 in the two brake oil circuits, that is, connected to the working ports B1 and B2 respectively. The pressure sensor 2 is set at the outlet port MB of the first shuttle valve 1 to measure the liquid pressure at the outlet port MB of the first shuttle valve 1.

[0019] The first shuttle valve 1 is an AND gate type shuttle valve. In the neutral position, the output port MB of the first shuttle valve 1 is open to both input ports, and the three ports are interconnected; in the left or right position, the output port MB of the first shuttle valve 1 is open to the input port on the lower pressure side, while the input port on the higher pressure side is in a throttling state.

[0020] Based on this switching characteristic, when the pressures output from working port B1 and working port B2 are unequal, the pressure on the high-pressure side will push the valve core of the first shuttle valve 1, ensuring that the output port MB of the first shuttle valve 1 is always connected to the input port on the low-pressure side. Therefore, the pressure sensor 2 located at the output port MB of the first shuttle valve 1 can always detect the minimum output braking pressure of the two braking oil circuits, providing a data basis for the system to determine whether the pressure is below the allowable value.

[0021] Since the module uses a single pressure sensor 2 to simultaneously monitor the minimum output braking pressure of both brake oil circuits, it can meet the pressure monitoring requirements. Therefore, the number of pressure sensors 2 and the corresponding electrical connection requirements in the module are reduced. This not only reduces material costs but also improves the interface resource usage of the controller. Under the premise of ensuring braking safety, it promotes a lightweight and economical braking control system architecture. At the same time, reducing the number of pressure sensors 2 also helps to simplify the control algorithm and data processing flow, reducing computational load and software complexity.

[0022] The first shuttle valve 1 is a normally open solenoid valve, which remains in the conducting state at all times to ensure the continuity of the basic braking function. In this embodiment, the first shuttle valve 1 is preferably a hydraulically piloted pressurized solenoid valve, which has more sensitive pressure switching and is more adaptable to complex vehicle braking control scenarios.

[0023] The hydraulic brake valve 3 is a normally closed solenoid valve to ensure safe isolation when not in operation. In this embodiment, the hydraulic brake valve 3 is a proportional solenoid three-position three-way solenoid valve, which has a fast response speed and long service life. In the left position, the oil inlet of the hydraulic brake valve 3 is in a cut-off state, and the oil return port T and the working port are in a conductive state, which can realize rapid pressure relief. In the middle position, the oil inlet, oil return port T and the working port of the hydraulic brake valve 3 are all in a cut-off state to lock the current pressure state. In the right position, the oil inlet and the working port of the hydraulic brake valve 3 are in a conductive state, and the oil return port T is in a cut-off state, which can establish high pressure output. By switching different working positions, different working conditions can be switched and met.

[0024] In addition, a second shuttle valve 4 is installed in the brake hydraulic circuit. On one of the second shuttle valves 4 in the brake hydraulic circuit, one input port L1 is used to obtain the hydraulic pressure generated when the driver depresses the brake pedal, i.e., the foot brake pressure. The other input port is connected to the working port B1 of the hydraulic brake valve 3 in the same brake hydraulic circuit to obtain the electric brake pressure. This second shuttle valve 4 compares and obtains the higher value between the foot brake pressure and the electric brake pressure, and outputs the higher pressure to the vehicle brake caliper through the output port C1 to control the vehicle brake caliper to apply the brakes.

[0025] Similarly, on the second shuttle valve 4 in the other brake oil circuit, one input port L2 is used to obtain the foot brake pressure, and the other input port is connected to the working oil port B2 to obtain the electric brake pressure. The output port C2 is used to control the vehicle brake caliper.

[0026] In summary, applying this dual-loop control braking module to the braking control system not only meets the monitoring requirements for the minimum output braking pressure, but also reduces the amount of pressure sensor 2 and its supporting components, simplifies the system architecture, reduces the controller interface usage, and facilitates system upgrades and expansion.

[0027] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims are within the scope of protection of the present invention.

Claims

1. A dual-loop circuit control braking module, characterized in that: It includes a first shuttle valve, a pressure sensor, and two brake oil circuits. The brake oil circuits are equipped with hydraulic brake valves. The two input ports of the first shuttle valve are respectively connected to the working oil ports of the hydraulic brake valves in the two brake oil circuits. The pressure sensor is located at the output port of the first shuttle valve and is used to measure the liquid pressure at the output port of the first shuttle valve. The first shuttle valve is an AND gate type shuttle valve; in the neutral position, the output port of the first shuttle valve is connected to both input ports; in the left or right position, the output port of the first shuttle valve is connected to the input port on the low-pressure side, and the input port on the high-pressure side is in a throttling state.

2. The dual-loop circuit control braking module as described in claim 1, characterized in that: The hydraulic brake valve is a three-position three-way solenoid valve; in the left position, the oil inlet of the hydraulic brake valve is in a cut-off state, and the oil return port and the working oil port are in a conductive state; in the middle position, the oil inlet, oil return port and the working oil port of the hydraulic brake valve are all in a cut-off state; in the right position, the oil inlet and the working oil port of the hydraulic brake valve are in a conductive state, and the oil return port is in a cut-off state.

3. The dual-loop circuit control braking module as described in claim 2, characterized in that: The hydraulic brake valve is a proportional electromagnetic valve.

4. The dual-loop circuit control braking module as described in claim 1, characterized in that: The return ports of the hydraulic brake valves in the two brake oil circuits are connected.

5. The dual-loop circuit control braking module as described in claim 1, characterized in that: The hydraulic brake valve is a normally closed solenoid valve, and the first shuttle valve is a normally open solenoid valve.

6. The dual-loop circuit control braking module as described in claim 1, characterized in that: The first shuttle valve is a hydraulically piloted pressure-controlled solenoid valve.

7. The dual-loop circuit control braking module as described in claim 1, characterized in that: The brake circuit is equipped with a second shuttle valve. One input port of the second shuttle valve is used to obtain the vehicle's foot brake pressure, and the other input port is connected to the working oil port of the hydraulic brake valve. The output port of the second shuttle valve can output pressure to the vehicle's brake caliper.

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