Crankcase fault detection method and device and related equipment

Abstract

The invention discloses a crankcase fault detection method and device and related equipment, and the method comprises the steps: determining the working condition of an engine, and obtaining the parameter change data of the engine and the pressure change data of a crankcase when the working condition of the engine is a transient working condition, the parameter change data of the engine comprises rotating speed change data of the engine and / or air inlet pressure change data of the engine; whether the parameter change data of the engine is matched with the pressure change data of the crankcase or not is judged, and when the parameter change data of the engine is not matched with the pressure change data of the crankcase, it is determined that the crankcase breaks down. In this way, whether the crankcase breaks down or not can be determined by judging whether the parameter change condition of the engine is matched with the pressure change condition of the crankcase or not. In this way, it can be avoided that the judgment result of the crankcase is affected by factors such as drifting of the pressure sensor or external environment interference, and therefore the fault detection precision of the crankcase can be effectively improved.

Description

technical field [0001] The present application relates to the technical field of vehicles, in particular to a crankcase fault detection method, device and related equipment. Background technique [0002] The crankcase refers to the device used to install the crankshaft at the lower part of the cylinder block in the vehicle. Since the gas flowing through the crankcase pipeline usually contains some harmful gases, such as incompletely burned carbon monoxide (CO), nitrogen oxides (NOx), etc., the crankcase is usually required to be in a closed-loop state, that is, when the gas flows through the crankcase There will be no leakage, so as to avoid pollution to the atmosphere after gas leakage occurs. [0003] At present, when fault detection is performed on the crankcase, pressure sensors are usually installed before and after the oil-air separator, and the pressure sensor is used to measure whether the pressure of the crankcase is abnormal. Among them, in the closed-loop condit...

AI Technical Summary

Problems solved by technology

[0004] However, in practical applications, it may be difficult to determine whether the crankcase pipeline is actually disconnected based on the pressure value measured by the pressure sensor due to measurement drift of the pressure sensor or changes in the external environment, which affects the performance of the crankcase. Fault Detection Accuracy

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