Test platform of electric and liquid composite braking of electric automobiles

Abstract

The invention relates to a test platform of electric and liquid composite braking of electric automobiles, comprising an executing unit, a sensing unit, a road simulating unit and a simulating control unit, wherein the simulating control unit comprises an electric and liquid composite braking control module; the executing unit comprises a driving electric motor, front braking disks, braking calipers, flywheels, a liquid storage pot and a regulating mechanism of wheel cylinder pressure; each front braking disk is provided with a braking caliper in a clamping way; the driving electric motor, two front braking disks and the flywheels are fixedly connected into a straight line orderly by a coupling and can rotate around the straight line; the pressure regulating end of the regulating mechanism of wheel cylinder pressure is respectively connected with a wheel cylinder inlet of each braking caliper by pipelines; an oil inlet and an oil return port of the regulating mechanism of wheel cylinder pressure are respectively connected with an oil outlet and an oil return port of the liquid storage pot by pipelines; and the sensing unit is used for collecting the pressure of the braking calipers, the rotating speed of the flywheels and the torque of the driving electric motor and the road simulating unit and then transmitting the pressure, the rotating speed and the torque to the electric and liquid composite braking control module used for computing the braking torque control quantity transmitted to the driving electric motor, the regulating mechanism of wheel cylinder pressure and theroad simulating unit. The dynamic characteristic test of the electric and liquid composite braking of electric automobiles is comprehensive, accurate and effective.

Description

technical field [0001] The invention relates to an electric vehicle test platform, in particular to an electric vehicle electric-hydraulic composite brake test platform. Background technique [0002] The braking control of electric vehicles includes two types of motor braking and hydraulic braking. Among them, motor braking is to convert the kinetic energy of the vehicle into electrical energy and store it in the energy storage device. For example: the name is "braking energy recovery comprehensive test device "Patent application in China (application number: 200810225933.5), which uses the main and auxiliary motors to provide kinetic energy, the ABS braking system provides frictional braking torque, and the generator converts part of the kinetic energy into kinetic energy and stores it in the battery pack to realize braking energy recovery. , to conduct ABS control system experimental research. The hydraulic brake is to convert the kinetic energy of the vehicle into heat e...

AI Technical Summary

Problems solved by technology

However, the above mathematical model cannot reflect the dynamic characteristics of actuators such as motors and hydraulic mechanisms, and inductive components such as brakes, pressure sensors, and speed sensors.

For the static test platform with hydraulic system, since all components are static, the static test platform can only reflect the response characteristics of the hydraulic adjustment mechanism, but cannot test and verify the dynamic characteristics of brakes, wheels, etc.

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