Automobile electric retarder control method and system

Abstract

The invention discloses an automobile electric retarder control method and an automobile electric retarder control system, and belongs to the technical field of automobile speed reducers. The system for implementing the method comprises a control system, the control system comprises a control switch, an electronic control unit, a driving relay, a power switch, an indicating lamp, a vehicle speed sensor, a temperature sensor, a test plug-in, a CAN interface, a brake lamp relay, a whole vehicle interface and a connecting wire harness. According to the invention, when the control switch is in a certain gear for a long time, the electronic control unit can calculate the working time of each coil of the retarder, and when the working time of a certain group of coils is detected to exceed the set time, the working group of the driving relay is automatically switched, and the switching of the working group follows the principles of rightward circulation and first-in first-out, and is completed within 1ms; a vehicle does not feel any feeling, overheating damage to a certain set of coils of the retarder due to long-time work is avoided, the service life of the retarder is prolonged, and theuse effect of the retarder is improved.

Description

technical field [0001] The invention relates to the technical field of automobile retarders, in particular to a method and system for controlling electric retarders of automobiles. Background technique [0002] At present, the control methods of automobile retarder can be divided into step-by-step drive and stepless PWM drive. Due to the characteristics of automobile retarder, such as poor working conditions and large working current, PWM drive has disadvantages such as high failure rate and slow response time, so the current market Most of them are still driven by sub-files. Using the "circle to the right" and "first in, first out" working methods can better solve the working frequency of each coil working group, but the working methods of "circulating to the right" and "first in first out" are achieved by the driver switching gears. Realized, in some special road sections, such as in the case of long-distance downhill, the retarder will work in a fixed gear for a long tim...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of coil damage caused by long-time non-shifting in the step-by-step drive in the prior art, and propose a method and system for controlling the electric retarder of an automobile

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