Control method of vehicle brake calipers introduced with energy accumulator

Abstract

The invention provides a control method of a vehicle brake caliper introduced with an energy accumulator, the brake caliper is driven by a motor, and when the motor is in a turn-off state, the motor is started to be turned off, and the control method comprises the following steps: step 1, confirming whether the energy accumulator is in an available state or not; step 2, controlling a relay to switch an energy accumulator into a motor power supply circuit; step 3, switching on a switch tube of a motor control loop, and performing motor control; 4, when the energy accumulator needs to be cut out of the motor power supply circuit, a switching tube in a motor control loop is closed firstly, and then the energy accumulator is cut out; and step 5, when the motor is closed through the switch tube, the positive and negative ends of the motor are short-circuited, so that the motor can be quickly stopped after the power supply is cut off. On the premise of comprehensively considering the cost performance of the actual system, the energy accumulator is ensured to be safely switched in and out of the power supply circuit, the response speed of the motor is improved, and accurate control when the motor stops is ensured.

Description

technical field [0001] The invention relates to the field of motor vehicles, in particular to a control method of a vehicle brake caliper incorporating an accumulator. Background technique [0002] In the brakes of the modern vehicle chassis, there are many kinds of mechanical calipers based on motor drive, such as the electronic parking system EPB, the electronic hydraulic caliper EHC, and the electronic mechanical brake EMB. These electronic control systems are usually composed of sensors, electronic control units ECU, and actuators. The electronic control unit ECU is responsible for issuing control commands to the actuator to achieve stable, fast and accurate control of the system; the actuator is an execution unit composed of a motor as a power source. [0003] In the evaluation of the response performance of the brake, the response time of the system is an important index of the system. Limited by various factors such as cost and installation location, it is difficult...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a control method of a vehicle brake caliper with an accumulator, by switching the accumulator and controlling the motor in a specific order, to realize the safe operation of the circuit and electronic devices and ensure the working life , improve the control accuracy, and solve the problems in the background technology that easily lead to the reduction or damage of the life of circuit devices

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