Accelerator pedal signal self diagnostic method

Abstract

The invention discloses an accelerator pedal signal self diagnostic method which comprises the steps that S101, under the condition of zero opening degree of the accelerator pedal opening degree, when an accelerator pedal signal belongs to a first threshold range, the signal is judged as normal, and when the accelerator pedal signal does not belong to the first threshold range, the signal is judged as fault; or S102, under the condition of intermediate opening degree of the accelerator pedal opening degree, when the accelerator pedal signal corresponding to the engine speed belongs to a second threshold range, the signal is judged as normal, and when the accelerator pedal signal corresponding to the engine speed does not belong to the second threshold range, the signal is judged as fault; or S103, under the condition of total opening degree of the accelerator pedal opening degree, when the accelerator pedal signal belongs to a third threshold range, the signal is judged as normal, and when the accelerator pedal signal does not belong to the third threshold range, the signal is judged as fault. By means of the above execution mode, when working condition diagnosis is entered, the current accelerator pedal signal value is read and compared with a preset right value, so that detection and diagnosis of a wrong accelerator pedal signal are achieved.

Description

technical field [0001] The invention relates to a diagnosis method, in particular to a method for self-diagnosis of an accelerator pedal signal. Background technique [0002] The gas pedal signal of a car is one of the very important signals in the electronic control system of a modern car, which must remain reliable throughout the life cycle of the car. Therefore, it is necessary to carry out online self-diagnosis on the accelerator pedal signal. Now common accelerator pedal self-diagnosis method is to use an accelerator pedal with two pedal signals, and judge whether the accelerator pedal signal is reliable by comparing whether the two pedal signals meet a predetermined relationship. But this method has the following two problems: 1. The accelerator pedal needs to have two pedal signals, which requires two sensors and two corresponding circuits, which increases the complexity and cost of the accelerator pedal; 2. If the ground voltage Differences and other reasons cause ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for self-diagnosis of accelerator pedal signal, which overcomes the problem that the original self-diagnosis method of accelerator pedal signal is very complicated to use and is prone to common-mode interference

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