Integrated electronic braking system and vehicle

Abstract

The utility model discloses an integrated electronic braking system which comprises a central controller and motor driving circuits, the motor driving circuits are electrically connected with wheel side motors, and at least two motor driving circuits are arranged in the central controller. According to the integrated electronic braking system, the motor driving circuit is integrated to the central controller, the problem that the working environment is severe when a brushless motor driving circuit is arranged on a wheel end brake can be solved, the performance and reliability of the whole EMB system can be improved, and the running safety of a vehicle can be effectively ensured. The utility model further discloses a vehicle.

Description

Technical Field

[0001] This utility model belongs to the field of braking system technology, specifically, it relates to an integrated electronic braking system and a vehicle. Background Technology

[0002] EMB (Electro-Mechanical Brake) is an electromechanical brake-by-wire system. As a more advanced version of brake-by-wire, it eliminates the hydraulic braking circuit and uses a brushless motor-driven mechanical structure to directly control the braking force at the wheels. This system architecture requires at least four wheel-end EMB controllers (WCUs), which are four brushless motor drive circuits, to be installed on each vehicle. Furthermore, to respond to the vehicle's braking force requirements and dynamic control algorithms, such as ABS (Anti-Lock Braking System) and ESC (Electronic Stability Control), a central control unit (CCU) for the EMB system is also required. This CCU monitors the vehicle's dynamic operation and controls its stability during braking.

[0003] The entire EMB system requires four wheel-end controller circuit units and two central controller circuit units. The harsh working environment at the wheel ends and the high requirements for the temperature and vibration resistance of electronic components can lead to an inability to effectively ensure vehicle driving safety.

[0004] The aim is to provide an improved electronic braking system, particularly addressing the harsh operating environment of brushless motor drive circuits located on wheel-end brakes, thereby enhancing the reliability of EMB braking systems. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention provides an integrated electronic braking system with the purpose of improving reliability.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an integrated electronic braking system, including a central controller and a motor drive circuit, wherein the motor drive circuit is electrically connected to the wheel-side motor, and the central controller is provided with at least two of the motor drive circuits.

[0007] The central controller is equipped with a switching circuit, which is electrically connected to the motor drive circuit.

[0008] The central controller includes a computing unit, which is electrically connected to the switching circuit. The motor drive circuit is configured to be controlled by a certain computing unit through the switching circuit.

[0009] The computing unit is configured with at least two paths.

[0010] The central controller is equipped with a sensor circuit, and the computing unit is electrically connected to the sensor circuit. The computing unit controls the motor drive circuit based on the sensor signals transmitted by the sensor circuit.

[0011] The sensor circuit shall have at least two channels.

[0012] The central controller is equipped with a power supply system, and at least one power supply system is configured to supply power to one of the computing units and the motor drive circuit.

[0013] The central controller is equipped with at least two electronic parking brake drive circuits.

[0014] This utility model also provides a vehicle including the aforementioned integrated electronic braking system.

[0015] This utility model's integrated electronic braking system solves the problem of harsh working environments when brushless motor drive circuits are located on wheel-end brakes by integrating the motor drive circuit into the central controller. This improves the performance and reliability of the entire EMB system and effectively ensures vehicle driving safety. In addition, integration can significantly reduce the number of control MCU chips, improve control efficiency and accuracy, reduce the unsprung weight of the vehicle, and save costs considerably. Attached Figure Description

[0016] This manual includes the following figures, which illustrate the following:

[0017] Figure 1 This is a schematic diagram of the integrated electronic braking system of this utility model;

[0018] Figure 2 This is the circuit control diagram of the integrated electronic braking system of this utility model;

[0019] The components in the diagram are labeled as follows: 1. Power management circuit; 2. First computing unit; 3. Switching control module; 4. Second computing unit; 5. Power management circuit; 6. Motor drive circuit; 7. First communication circuit; 8. Braking sensor circuit; 9. Motor position sensor circuit and wheel speed sensor circuit; 10. Second communication circuit; 12. Power supply; 13. Wheel-side motor. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of this utility model, and to facilitate its implementation.

[0021] Firstly, such as Figure 1 and Figure 2 As shown, this utility model embodiment provides an integrated electronic braking system, including a central controller and a motor drive circuit. The motor drive circuit is electrically connected to the wheel-side motor, and the central controller is provided with at least two motor drive circuits.

[0022] Specifically, in this embodiment of the invention, by integrating the motor drive circuit into the central controller, the problem of the harsh working environment of the motor drive circuit located on the wheel-end brakes can be solved. Through optimization of the circuit design, the impedance loss of the long-distance, high-current drive circuit loops is reduced, and redundant switching of the drive circuit is implemented, improving the performance and reliability of the entire EMB system. This effectively ensures vehicle driving safety. When any single point of failure of the service brake occurs, the integrated electronic braking system of this embodiment of the invention achieves safe braking and parking braking by switching control of the backup circuit.

[0023] In this embodiment of the present invention, the central controller refers to the central control ECU (Electronic Control Unit), which may include all the control circuits of the present invention, or may integrate other functional modules, communication modules and other computing brains in the vehicle, or may be a domain controller.

[0024] like Figure 1 As shown, the central controller has at least two motor drive circuits, each controlling a wheel-side motor that drives a brake on a different wheel. The central controller also includes a switching circuit electrically connected to all motor drive circuits.

[0025] like Figure 1 As shown, a computing unit is set up in the central controller. The computing unit is electrically connected to the switching circuit. The motor drive circuit is configured to be controlled by a certain computing unit through the switching circuit. At least two computing units are configured, and the switching circuit is electrically connected to all computing units. This computing unit can be a microprocessor chip or a dedicated pre-programmed chip. A switching circuit is set between the computing unit and the motor drive circuit. This switching circuit is adjusted according to the design scheme of the motor drive circuit. The purpose of the switching circuit is to allow switching to another computing unit and a normally functioning motor drive circuit for continued control in the event of a single-point failure in a computing unit or a motor drive circuit closely related to the computing unit, ensuring the normal operation of the braking system.

[0026] In this embodiment of the invention, the wheel-side motor is a motor mounted on the end of the vehicle wheel. The number of motors mounted on a single wheel is not limited to one; a parking motor can also be used. The wheel-side motor provides the driving force to move the piston of the brake, and is the drive motor for applying braking force.

[0027] like Figure 1 As shown, the central controller includes a sensor circuit, and the computing unit is electrically connected to the sensor circuit. The computing unit controls the motor drive circuit based on the sensor signals transmitted by the sensor circuit. The sensor circuit has at least two channels.

[0028] like Figure 1 and Figure 2 As shown in this embodiment of the invention, the sensor circuit includes a brake sensor circuit, a motor position sensor circuit, and a wheel speed sensor circuit. The brake sensor circuit has at least two channels. The brake sensor circuit is electrically connected to the brake pedal position sensor (PTS). The brake pedal position sensor determines the position of the brake pedal and generates a braking intention signal indicating the degree of brake pedal depressor. The central controller receives the driver's braking intention signal through at least two brake intention sensor circuits. The wheel speed sensor circuit is electrically connected to the wheel speed sensor (WSS). The wheel speed sensor measures the rotational speed of the wheels during vehicle operation. The wheel speed sensor circuit is connected to the central controller to provide real-time information on the vehicle's motion status. The motor position sensor circuit is electrically connected to the motor position sensor (RPS). The motor position sensor measures the precise position of the rotor of the wheel-side motor.

[0029] like Figure 1 As shown in the embodiment of this utility model, the two computing units (the first computing unit 2 and the second computing unit 4 in the figure) set in the central controller control the motor drive circuit through the switching circuit redundancy. By setting the received sensor signals, the computing unit determines and switches the control of the motor drive circuit.

[0030] The switching circuit is configured with at least one set of control switches. The control signals for the control switches are distributed according to the calculation unit, and the control signals control the motor drive module through the switching circuit.

[0031] The motor drive circuit and switching circuit in the central controller are connected. The motor drive circuit is connected to the wheel-side motor through a connector, and the wheel-side motor can be configured to be controlled by a certain computing unit by switching the circuit through a switch.

[0032] The motor position sensor circuit and wheel speed sensor circuit in the central controller are connected to the computing unit. The motor position sensor circuit provides feedback values ​​for precise motor control, and the wheel speed sensor circuit can provide vehicle status based on the signals obtained from the wheel speed sensors. In addition, combined with the signals transmitted to the computing unit from the brake sensor circuit, both computing units can control the motor drive circuit based on the brake sensor circuit and the wheel speed sensor circuit.

[0033] like Figure 1 and Figure 2 As shown, the central controller is equipped with a redundant power supply system (PowerManagement IC, PMIC). This power supply system is also controlled by the computing unit. At least one power supply system is configured to supply power to one computing unit and the motor drive circuit. The power supply systems do not interfere with each other, and the computing unit controls whether to supply power to each system separately.

[0034] In this embodiment of the invention, the central controller is equipped with at least two electronic parking brake drive circuits. The vehicle's wheel speed sensor circuits are also integrated into the central controller along with the corresponding motor drive circuits. Even if a single wheel-side connection circuit fails at a single point, or if any hardware component of the central controller fails at a single point, a computing unit can still control the motor drive circuits by switching circuits, ensuring that braking force is maintained at least on three wheels, thereby improving the vehicle's safety and stability.

[0035] The control method for the aforementioned integrated electronic braking system includes the following steps:

[0036] The central controller identifies the type of vehicle service brake malfunction.

[0037] The central controller monitors the brake sensor signals and controls the brakes to apply braking force when the set conditions are met.

[0038] The central controller determines the wheel speed status signal of the vehicle, compares the wheel speed status signal with the braking intention signal to a preset value, and the calculation unit sends a signal to the motor drive circuit to control the brake to decelerate the vehicle with a certain braking force.

[0039] In this embodiment of the invention, the types of service brake malfunctions include ineffective service brakes and weakened service brakes. The central controller identifies ineffective or weakened service brakes, calculates the vehicle's posture and compares it with the driver's intention using an integrated computing unit, and controls the motor drive circuit to control the vehicle's braking for safety.

[0040] In this embodiment of the invention, the central controller monitors the continuous changes in the braking intention signal transmitted by the brake sensor circuit, and obtains the calculation result after calculation. Once the calculation result exceeds the set value, the set condition is met, and then the control brake is immediately applied to the wheel by switching the circuit.

[0041] In this embodiment of the invention, the central controller determines the wheel speed status signal of the vehicle and performs correlation calculations on the wheel speed sensor signal and the brake sensor signal. The calculation result is then compared with a set threshold. If the calculation result exceeds the threshold, the calculation unit sends a signal to control the motor drive circuit, causing the wheel-side motors to operate and the brakes to generate a certain braking force, thus slowing the vehicle down. If the calculation result is below the threshold, the wheel-side motors will not operate.

[0042] Through the above operations, regardless of the type of single-point failure, the vehicle's electronic braking system can decelerate and brake the vehicle to a stop, and lock the vehicle with a certain parking force.

[0043] In this embodiment of the invention, during the vehicle deceleration and braking process, the central controller integrates the control circuit of the wheel-side motors to control the brakes or release the brakes. The central controller can continue to monitor the brake pedal travel signal and ensure the maximum braking force of at least three wheel sides.

[0044] The integrated electronic braking system described above has the following advantages:

[0045] 1. Achieving braking safety: By adopting a backup motor drive circuit and a switching circuit, four independent wheel-side motors can be used for braking control. Even if any wheel-side motor fails, a safe braking force can be maintained to ensure safe braking of the vehicle.

[0046] 2. The main electronic components of the wheel-end controller of the EMB system were moved from the wheel end to the central controller, and the circuit of the control center was backed up and switched, reducing the number of electronic components used in the entire system.

[0047] Secondly, this utility model also provides a vehicle including an integrated electronic braking system with the above-described structure. The specific structure of this integrated electronic braking system can be found in [reference needed]. Figures 1 to 2 Further details will not be elaborated here. Since the vehicle of this invention includes the integrated electronic braking system described in the above embodiments, it possesses all the advantages of the aforementioned integrated electronic braking system.

[0048] The complete vehicle and vehicles of this utility model include, but are not limited to, passenger cars and commercial vehicles.

[0049] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. An integrated electronic braking system, comprising a central controller and a motor drive circuit, wherein the motor drive circuit is electrically connected to a wheel-side motor, characterized in that, The central controller is equipped with at least two motor drive circuits.

2. The integrated electronic braking system according to claim 1, characterized in that, The central controller is equipped with a switching circuit, which is electrically connected to the motor drive circuit.

3. The integrated electronic braking system according to claim 2, characterized in that, The central controller includes a computing unit, which is electrically connected to the switching circuit. The motor drive circuit is configured to be controlled by a certain computing unit through the switching circuit.

4. The integrated electronic braking system according to claim 3, characterized in that, The computing unit is configured with at least two paths.

5. The integrated electronic braking system according to claim 4, characterized in that, The central controller is equipped with a sensor circuit, and the computing unit is electrically connected to the sensor circuit. The computing unit controls the motor drive circuit based on the sensor signals transmitted by the sensor circuit.

6. The integrated electronic braking system according to claim 5, characterized in that, The sensor circuit shall have at least two channels.

7. The integrated electronic braking system according to any one of claims 3 to 6, characterized in that, The central controller is equipped with a power supply system, and at least one power supply system is configured to supply power to one of the computing units and the motor drive circuit.

8. The integrated electronic braking system according to any one of claims 3 to 6, characterized in that, The central controller is equipped with at least two electronic parking brake drive circuits.

9. A vehicle, characterized in that, Includes the integrated electronic braking system as described in any one of claims 1 to 8.

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