The influence of changing the valve thermal clearance on the gas-dynamic parameters of the VAZ 21083 engine

Abstract

Diagnostics used to maintain the efficiency of the internal combustion engine. A complex has been developed for non-selective diagnostics by simulating engine operation. The purpose of the study is the ability of this complex to identify a violation in the size of the thermal gap of the engine valve. The experiment involves changing the thermal gap in the intake and exhaust valves up and down. The result of the experiment is the oscillograms of pressure changes in the intake, exhaust manifolds and crankcase of the engine at different sizes of the thermal gap. Based on the conducted research, it can be concluded that when simulating various malfunctions, the pressure values are different and differ from the pressure with a working engine, and the nature of the flow of pressure waveforms along the angle of rotation of the engine camshaft is also different, which will allow determining the specific causes of malfunction of engines and their systems.