Device and method for detecting phase deviation of engine

Abstract

The invention discloses a device for detecting the phase deviation of an engine, which comprises a rotating speed sensor, a mounting hole, a signal panel, an auxiliary detection mechanism and an angular scale, wherein the rotating speed sensor is used for detecting the rotating speed of a flywheel; the mounting hole is used for mounting a phase sensor; the signal panel is arranged on a camshaft; the signal panel comprises a body; a first big tooth, a second big tooth, a first small tooth and a second small tooth are arranged on the body; the first big tooth, the second big tooth, the first small tooth and the second small tooth are sequentially distributed along the circumferential direction of the body; the surface of the first big tooth, which is close to the second small tooth, is a front end face; the auxiliary detection mechanism is in slide fit with the mounting hole; the front end of the auxiliary detection mechanism is provided with a metal sheet capable of being attached to the front end face; the angular scale is used for reading an angle between a reference tooth on the flywheel and a tooth corresponding to the center line of the rotating speed sensor; and the auxiliary detection mechanism also comprises a thrust head which externally protrudes out of the mounting hole for mounting the phase sensor. According to the device, a phase detector is not required in the process of detecting the phase deviation and the phase deviation of the engine can be detected without starting the engine.

Description

technical field [0001] The invention belongs to the technical field of engines, and in particular relates to an engine phase deviation detection device and a method thereof. Background technique [0002] One end of the crankshaft of the four-stroke gasoline engine of the prior art is equipped with a flywheel, and a speed sensor for detecting the speed signal of the flywheel is installed on the cylinder body. The front end of the speed sensor is columnar; connection, one of the camshafts is provided with a signal plate, and the signal plate includes a body, and the body is provided with four teeth: the first large tooth, the second large tooth, the first small tooth, and the second small tooth. The first large tooth, the second large tooth, the first small tooth, and the second small tooth are distributed along the circumference of the body in sequence, and the surface of the first large tooth close to the second small tooth is the front end face; The phase sensor installed ...

AI Technical Summary

Problems solved by technology

However, in the actual situation, the variable valve timing system of the gasoline engine, that is, the VVT ​​system, sometimes jams, or there are deviations in the processing and assembly of the various parts of the engine, or the accuracy of the parts decreases after the engine is running, etc., will cause The camshaft phase signal of the engine does not correspond to the rotational speed signal of the flywheel, that is, there is a deviation between the camshaft phase signal and the rotational speed signal of the flywheel; The ignition time is advanced or delayed, the fuel-air mixing ratio is not suitable, resulting in insufficient combustion, and black smoke in the exhaust gas, which reduces the output power and torque of the engine and makes the engine power insufficient.

[0003] The phase detector used to detect the phase deviation of the engine in the prior art is expensive and can only be detected after the engine is started. If the deviation between the phase signal of the camshaft and the rotational speed signal of the flywheel exceeds the allowable range, the startup will Cause damage to the engine and affect the service life of the engine

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