Gasoline engine high-pressure oil pump driving cam phase measuring method and system and storage medium

Abstract

The invention discloses a gasoline engine high-pressure oil pump driving cam phase measuring method and system and a storage medium. The method comprises the following steps: measuring the rotating angle of an engine crankshaft through an angle marker, measuring the cam lift through a displacement sensor, and outputting a cam lift signal; measuring the pressure in an engine cylinder through a cylinder pressure sensor and outputting a cylinder pressure signal; acquiring a compression top dead center position of a cylinder piston of the engine through a cylinder pressure sensor, and defining thetop dead center position as 0 degree; making a cam lift signal and a cylinder pressure signal connected into a lower computer combustion analyzer and uploaded to an upper computer, measuring the angle position of the top dead center of the oil pump cam through the upper computer and realizing measurement of the phase of the oil pump cam. Compared with the prior art, existing resources are effectively utilized, the phase measurement precision of the gasoline engine high-pressure oil pump driving cam is improved, the labor intensity is reduced, the test time is shortened, and the working efficiency is improved.

Description

Technical field[0001]The invention relates to the technical field of phase measurement of a driving cam of a high-pressure oil pump of a gasoline engine, in particular to a method, a system and a storage medium for measuring the phase of a driving cam of a high-pressure oil pump of a gasoline engine.Background technique[0002]Before the engine bench calibration or performance test starts, it is necessary to check whether the phase relationship of the actual high-pressure oil pump drive cam is consistent with the design value to ensure that the engine is in normal condition, the control is accurate, the test is safe, and the data is valid.[0003]The phase measurement of the oil pump cam is to measure the crankshaft angle of the top dead center of the oil pump cam relative to the top dead center position of the first cylinder piston.[0004]The existing method of checking the phase of the oil pump driving cam is: install a circular angle disc on the front end of the crankshaft, fix the an...

AI Technical Summary

Problems solved by technology

[0005] 1. The phase relationship cannot be presented intuitively;

[0006] 2. The measurement is difficult and the error is large: When looking for the top dead center, the dial indicator probe enters the combustion chamber from the spark plug installation hole to touch the top of the piston, slowly and carefully rotate the crankshaft, and observe the reading of the dial indicator at the same time. The value is obtained by visually observing the reading, and the error Big

[0007] 3. There are many processes, time-consuming and labor-intensive: it is necessary to remove the ignition coil, spark plug, high-pressure oil pump and its connectors of one cylinder, install the dial indicator, angle plate, pointer, manually rotate the crankshaft, read and record; the engine development stage is not in the body If the piston position mark is marked on the front end, the cylinder head cover needs to be removed and changed, and the position of the valve cam can be observed to determine the top dead center of the piston compression stroke.

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