There are seven factors affecting the cylinder sealing performance, mainly including cylinder wear, piston ring damage, piston wear, valve seat damage, valve guide wear, cylinder gasket damage, valve clearance and other aspects.
What are the commonly used diagnostic methods? There are mainly measurement of cylinder pressure, crankcase xenon gas volume, cylinder air leakage and air leakage rate, intake pipe vacuum degree, abnormal vibration of cylinder piston group due to excessive wear, and wear metal in crankcase is particle content. Determination.
For the measurement of the cylinder compression pressure, it is mainly the pressure at the end of the four-stroke engine compression. Due to the pressure of the cylinder, the viscosity of the oil and the cylinder piston set, the adjustment of the valve train is correct, the sealing of the cylinder head and other factors, so when measuring the pressure of the engine cylinder, the cylinder piston can be diagnosed. In the case of sealing, if the piston ring, valve, and cylinder head gasket are well sealed, the clearance of the valve must be appropriate.