The invention provides a method and a system for diagnosing an automobile speed fault. According to the method for diagnosing the automobile speed fault disclosed by the invention, when an automobile is in a sloping state, an electronic control system of the automobile judges that the automobile speed of the automobile fails, and whether a clutch of the automobile is stepped, whether the current gear of the automobile is a neutral gear, and the duration when the current gear of the automobile is not the neutral gear are required to be judged before the automobile speed fault is reported; when all judgment results are true, the automobile speed fault is not reported. Note that, the judgments do not have an order requirement. Namely, when the automobile is in the sloping state, the automobile speed fault is not reported when the conditions that the clutch of the automobile is stepped, the current gear of the automobile is not the neutral gear, and the duration that the current gear of the automobile is not the neutral gear is greater than or equal to the required time are met, so that the automobile speed fault signal misinformation probability of the electronic control system in the automobile is reduced.
Method and system for diagnosing automobile speed fault
2015-05-27
Patent
Electronic Resource
English
IPC: | B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion |
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