Electronic steering column lock control system

Abstract

The invention discloses an electronic steering column lock control system. After the electronic steering lock receives the locking triggering signals and the corresponding implementing condition is determined, a motor is driven to move; before a lock tongue arrives at locking position, a calculator is used to carry out step length accumulation in normal progress; if the lock tongue does not arrive at the locking position when the time of driving the motor is out, the electronic steering lock will carry out step length accumulation N times than the normal progress; when the accumulation value is accumulated enough to arrive at the limiting value of opening a protection door, the locking position won't be performed and at the same time the execution motor power source is cut off; the calculator will accumulate in degression; and when the value accumulated in degression by the calculator arrives at the limiting value of closing the protection door, at this time, the locking / unlocking operation is allowed to perform while supplying the execution motor power source again. According to the electronic steering column lock control system provided here, if a fault of inner mechanical structure exists in the electronic steering column lock, the lock tongue won't arrive at the locking position; the control motor is stopped moving; and as a result, the motor is prevented from heating due to continuous power supply.

Description

technical field [0001] The invention relates to automobile electronic technology, in particular to an electronic steering column lock control system. Background technique [0002] Due to the inherent advantages of high reliability, high safety, long life, and low cost of electromechanical control modules, more and more purely mechanical functional modules are replaced by electromechanical control modules, and electronic steering column lock control systems are typical applications. , its main function is that the electronic control module controls the steering column lock to lock or unlock the steering column by judging the status information of the car itself (ignition switch status, vehicle speed, engine speed, gear position, etc.). [0003] The specific scheme of the existing electronic steering column lock control system is as follows: figure 1 As shown, the part framed by the dotted line is the electronic steering column lock control system 101 . At present, the techn...

AI Technical Summary

Problems solved by technology

[0004] In the existing electronic steering column lock control system, thermistors are usually installed on the three phases of the stator coil of the deadbolt driving motor. When the coil is overheated, the main circuit contactor of the deadbolt driving motor is disconnected to cut off the power of the motor This cannot avoid the impact of instantaneous high current impact when the motor is close to the zero point before the power is cut off, which will affect the service life of the motor.

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