Valve clearance fault detection method, valve clearance fault detection system and automobile

Abstract

The invention discloses a valve clearance fault detection method, a valve clearance fault detection system and an automobile. According to the technical scheme, a stress continuous phase of an enginepush rod can be obtained in the whole automobile operation process; the valve clearance of an engine is calculated on the basis of the stress continuous phase of the push rod; and whether the warningcondition is met or not can be determined on the basis of the valve clearance so as to perform warning information display. Therefore, by using the technical scheme of the invention, in the whole automobile operation process, the valve clearance can be detected in real time through detecting the stress continuous phase of the engine push rod; and if the valve clearance is abnormal, the warning prompt can be performed in time.

Description

technical field [0001] The invention relates to the technical field of engines, more specifically, to a detection method and detection system for a valve clearance fault and an automobile. Background technique [0002] Engine cylinder heads, valves, camshafts, rocker arms and other parts are installed on the top of the combustion chamber, which is where the temperature is the highest. Due to the thermal expansion and contraction of the parts, it is generally necessary to leave room for the valves and other parts to expand, that is, valve clearance. Because the position of the valve has been subjected to high-temperature and high-pressure airflow impact for a long time, as well as the mechanical impact caused by the reciprocating movement of the piston, the valve mechanism is easy to wear, and the wear of the valve disc and valve seat ring will make the valve clearance smaller, and the rocker arm, push rod The wear of components such as tappets, camshafts, etc. will cause th...

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Problems solved by technology

[0003] The size of the valve clearance has a great impact on the performance of the engine. If the clearance is too small, the engine may cause valve leakage due to the expansion of the valve stem in the hot state, resulting in a decrease in power; if the clearance is too large, it is easy to Collision occurs and the duration of valve opening is reduced. Insufficient intake and exhaust will also directly affect the performance state and emission state of the engine.

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