Automobile electronic brake control system

Abstract

The utility model discloses an automobile electronic brake control system, which is characterized in that each wheel of an automobile is provided with an independent electronic mechanical brake, the automobile is provided with an electronic simulation pedal, the electronic simulation pedal is connected with and outputs a brake signal to a central controller, each electronic mechanical brake is internally and independently provided with an ECU (Electronic Control Unit) for controlling a brake caliper to work, and the ECU is connected with the central controller. And the central controller communicates with each ECU to obtain a working state signal of each ECU, and the central controller is used as a standby control device of the ECU. According to the utility model, the interaction between an electric control strategy and other controllers is simplified, the weight of the whole vehicle is reduced, the brake caliper can achieve zero dragging, the sliding resistance of the whole vehicle is reduced, and the energy consumption of the whole vehicle is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile brake control. Background Art

[0002] With the continuous improvement and development of automotive electronics, intelligence, lightweight, low energy consumption and the improvement of integration concepts, new energy vehicles have begun to develop in the direction of software-defined vehicles, and are being developed in accordance with the concepts of low wind resistance, low energy consumption, long battery life and lightweight.

[0003] At present, all automobiles use hydraulic brake systems. For example, the public document with announcement number CN 108791256A, publication date 2018-11-13, and patent name "A Hydraulic Brake Valve for Hydraulic Braking System of Electric Vehicle" discloses a hydraulic brake valve for hydraulic braking system of electric vehicle, including a valve body, and a driver, oil pump, overflow valve, one-way valve, hydraulic output control valve, and pressure reducing valve arranged on the valve body. An oil pump extending upward into the valve body is arranged on the lower end surface of either end of the valve body, and a driver is arranged on the upper end surface of the valve body corresponding to the oil pump. The driver extends downward into the valve body and connects to the oil pump. An overflow valve is arranged on the front side of one end of the valve body where the oil pump is arranged. One end of the overflow valve is connected to the oil pump, and the other end is connected to the one-way valve and the hydraulic output control valve in sequence through a pipeline. A liquid reflux port is arranged on the upper end surface of the valve body, and one-way valves matching the liquid reflux port are arranged in sequence.

[0004] Since EHB uses hydraulics as its braking energy source, the generation and electronic control of hydraulics are relatively difficult, and it is not easy to integrate with other electronic control systems; moreover, the weight of the hydraulic system is not conducive to lightweighting. Summary of the invention

[0005] The technical problem to be solved by the utility model is to realize a braking system suitable for electric vehicles, which can reduce the complexity of the system and improve the reliability of the system through a reliable redundant design structure.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an automobile electronic brake control system, each wheel of the automobile is provided with an independent electronic mechanical brake, the automobile is provided with an electronic simulation pedal, the electronic simulation pedal is connected to and outputs a brake signal to a central controller, each of the electronic mechanical brakes is independently provided with an ECU for controlling the operation of the brake caliper, the central controller communicates with each ECU to obtain the working status signal of each ECU, and the central controller serves as a backup control device for the ECU.

[0007] The central controller is connected to an instrument I CM, and the instrument I CM is used to display the working status of the electronic simulation pedal, four electronic mechanical brakes, and the central controller.

[0008] The information that the central controller interacts with each ECU includes wheel speed signals, master cylinder pressure sensor signals, steering wheel angle signals, throttle opening signals, IMU signals, drive motor related signals, brake switch signals, and main software switch signals.

[0009] The central controller and each ECU have ABS, EBD, VDC, TCS, VAF, and energy recovery control functions.

[0010] The central controller is used to monitor whether the working status of each ECU is normal.

[0011] The electronic mechanical brake is composed of a brake caliper, a drive motor, and an ECU. The drive motor drives the brake caliper to work, and the ECU is connected to and outputs a control signal to the drive motor.

[0012] The car is a fuel car, a pure electric car, an extended-range electric car or a hybrid electric car.

[0013] The utility model solves the problem of simplifying the interaction between the electronic control strategy and other controllers, reduces the weight of the whole vehicle, and the brake caliper can achieve zero drag, reduce the sliding resistance of the whole vehicle, and reduce the energy consumption of the whole vehicle.

[0014] It makes the braking response more sensitive, shortens the braking distance, saves a set of hydraulic pipelines, reduces the number of parts, reduces the process steps, reduces the weight of the vehicle, reduces the vehicle's sliding resistance, reduces the vehicle's energy consumption, and increases the vehicle's endurance. It can also achieve redundancy of ABS, EBD, VDC, TCS, VAF functions and energy recovery, ensuring vehicle driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following is a brief description of the contents of each figure in the utility model specification:

[0016] Figure 1 This is a schematic diagram of the structure of an automobile electronic brake control system;

[0017] Figure 2 This is a schematic diagram of mutual redundancy of controller signals. DETAILED DESCRIPTION

[0018] The following is a further detailed description of the specific implementation methods of the present invention, such as the shapes and structures of the components involved, the relative positions and connection relationships between the components, the functions and working principles of the components, the manufacturing process and the operation and use methods, etc., through the description of the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0019] The automotive electronic brake control system is designed to be redundant from the electronic mechanical brake control system to the signal communication system, enabling distributed braking control of the vehicle's four wheels, making driving safer and control more sensitive. It also reduces the number of parts and process steps, reduces the weight of the vehicle, and allows the brake caliper to achieve zero drag, thereby reducing the vehicle's skid resistance, reducing the vehicle's energy consumption, and increasing the vehicle's endurance.

[0020] Specifically, the automotive electronic brake control system can be applied to current conventional vehicle models, such as fuel vehicles, pure electric vehicles, extended-range electric vehicles or hybrid electric vehicles. The vehicles are all equipped with an electronic simulation pedal, namely the brake pedal. The electronic simulation pedal calculates the depth of the pedal through an internal angle sensor and can adjust different pedal feels through a simulator. It has a signal and power redundancy system.

[0021] Each wheel is equipped with an independent electro-mechanical brake, which consists of three major parts: brake caliper, drive motor and control unit ECU. The control unit ECU has the control functions of ABS, EBD, VDC, TCS, VAF and energy recovery.

[0022] The central controller can monitor whether the electronic simulated pedal has fault degradation, monitor whether the four electronic mechanical brakes (EMB) have faults or functional degradation, and has redundant control of ABS, EBD, VDC, TCS, VAF and energy recovery functions.

[0023] The electronic simulation pedal is connected to and outputs a braking signal to the ECU of the electronic mechanical brake. At the same time, the redundant signal output interface of the electronic simulation pedal is connected to the central controller and also sends a redundant braking signal to the central controller. The central controller communicates with each ECU to obtain the working status signal of each ECU. The central controller is used to monitor whether the working status of each ECU is normal. It is a backup control device of the ECU. The central controller monitors the electronic simulation pedal and four electronic mechanical brakes (EMB) in real time. When the electronic simulation pedal is downgraded to use the redundant system, and when any one of the four electronic mechanical brakes (EMB) fails or its function is downgraded due to its own reasons, the auxiliary system starts redundant work.

[0024] During normal operation, when the driver steps on the electronic simulation pedal, the electronic mechanical brake (EMB) calculates the required braking force based on the depth, strength, speed of the driver's pedal and the vehicle's current body posture and driving status, including speed, acceleration, deceleration, yaw angle, steering angle, etc., and performs distributed braking on the four wheels, as well as turning on and off functions such as ABS, EBD, VDC, TCS, VAF and energy recovery by judging the vehicle's current status.

[0025] The central controller is connected to the instrument I CM, which displays the status of the electronic simulation pedal, four electronic mechanical brakes (EMB), and the central controller, as well as display reminders of the functional status of ABS, EBD, VDC, TCS, VAF, and energy recovery.

[0026] When the driver steps on the electronic simulation pedal, the central controller directly takes over the ECU functions of the four electronic mechanical brakes (EMB). The central controller calculates the required braking force to brake the four wheels based on the depth, strength, rate of the driver's pedal depression and the vehicle's current body posture and driving status, including speed, acceleration, deceleration, yaw angle, steering angle, etc., and turns on and off functions such as ABS, EBD, VDC, TCS, VAF and energy recovery by judging the vehicle's current status.

[0027] The utility model directly drives the electronic mechanical brake caliper (EMB) through the electronic simulation pedal through the wiring harness, and the electronic mechanical brake caliper (EMB) integrates the ECU controller to use the functions of ABS, EBD, VDC, TCS, VAF and energy recovery. Each wheel uses the electronic mechanical brake caliper (EMB) separately, so that each wheel can be distributedly controlled, and the signal transmission is relatively fast and the response is sensitive. A central controller is also equipped to ensure the redundancy of the functions of ABS, EBD, VDC, TCS, VAF and energy recovery.

[0028] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An automobile electronic brake control system, each wheel of the automobile is provided with an independent electronic mechanical brake, characterized in that: The automobile is provided with an electronic simulation pedal, which is connected to and outputs a brake signal to a central controller. Each of the electronic mechanical brakes is independently provided with an ECU for controlling the operation of the brake caliper. The central controller communicates with each ECU to obtain the working status signal of each ECU. The central controller serves as a backup control device for the ECU.

2. The automotive electronic brake control system according to claim 1, characterized in that: The central controller is connected to the instrument ICM, and the instrument ICM is used to display the working status of the electronic simulation pedal, four electronic mechanical brakes, and the central controller.

3. The automotive electronic brake control system according to claim 2, characterized in that: The information that the central controller interacts with each ECU includes wheel speed signals, master cylinder pressure sensor signals, steering wheel angle signals, throttle opening signals, IMU signals, drive motor related signals, brake switch signals, and main software switch signals.

4. The automotive electronic brake control system according to claim 3, characterized in that: The central controller and each ECU have ABS, EBD, VDC, TCS, VAF, and energy recovery control functions.

5. The automotive electronic brake control system according to claim 4, characterized in that: The central controller is used to monitor whether the working status of each ECU is normal.

6. The automotive electronic brake control system according to claim 5, characterized in that: The electronic mechanical brake is composed of a brake caliper, a drive motor, and an ECU. The drive motor drives the brake caliper to work, and the ECU is connected to and outputs a control signal to the drive motor.

7. The automotive electronic brake control system according to any one of claims 1 to 6, characterized in that: The car is a fuel car, a pure electric car, an extended-range electric car or a hybrid electric car.

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