Control method and control system for KL15 signal of commercial vehicle

Abstract

The invention discloses a control method and control system for a KL15 signal of a commercial vehicle, and relates to the technical field of automobile electronic control. The control method comprises the steps that a controller judges whether an ignition lock outputs the KL15 signal normally or not, if the ignition lock outputs the KL15 signal normally, the controller outputs the KL15 signal to an electric element, if the ignition lock outputs a KL15 signal abnormally, the controller judges whether the vehicle is in a running state or not, if the vehicle is in the running state, the controller continues to output the KL15 signal to the electric element, and if the vehicle is in a non-running state, the controller stops outputting the KL15 signal after delaying for preset first duration. According to the control method, when the ignition lock has no mechanical fault, the ignition lock outputs the KL15 signal normally, and the controller normally outputs the KL15 signal to the electric element; and when the ignition lock has a mechanical fault, the ignition lock outputs the KL15 signal abnormally, the controller continues to output the KL15 signal to the electric element, so that the electric element can still receive the KL15 signal when the ignition lock has a mechanical fault, and the condition of vehicle running flameout is avoided.

Description

technical field [0001] The invention relates to the technical field of automotive electronic control, in particular to a control method and a control system for a KL15 signal of a commercial vehicle. Background technique [0002] At present, the KL15 signal usually represents the ignition signal of the engine and the signal to start the vehicle. [0003] In the existing technology, such as figure 1 As shown, the ignition lock is turned to the ON gear, the KL15 relay pulls in, and the contact terminal is connected to the positive pole of the battery power supply to provide the KL15 signal to the electric unit of the vehicle. [0004] However, if the ignition lock itself fails mechanically, the ignition lock will output the KL15 signal failure, and the KL15 relay will not work normally, resulting in the failure of the KL15 signal provided to the power unit of the vehicle, which will cause problems such as vehicle stalling and seriously affect the safety of the vehicle. . C...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a control method and control system for the KL15 signal of a commercial vehicle to solve the technical problem that in the existing KL15 signal control method, if the ignition lock fails mechanically, the vehicle will stall when driving

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