There are seven factors that affect the sealing of Petrol Car cylinders, mainly including cylinder wear, piston ring damage, piston wear, valve seat damage, valve guide wear, cylinder gasket damage, valve clearance and other issues.
For the measurement of cylinder compression pressure, it is mainly the pressure at the end of compression of a four-stroke Changan Car engine. Due to the cylinder pressure, oil viscosity, cylinder piston group and other matching conditions, whether the valve mechanism is adjusted correctly, the sealing of the cylinder gasket and other factors, when measuring the cylinder pressure of a Changan Car engine, the sealing of the cylinder piston group can be diagnosed. If the sealing of the piston ring, valve and cylinder gasket is good, then the valve clearance must be appropriate.
2. Muffler firmness test
The muffler consists of an outer tube and an internal honeycomb. The two parts are combined together by mechanical buckle technology because they are in a special environment such as high temperature and vibration. We know that the quality of this process depends on the precision of the design. If the combination is not firm, it will loosen or fall off due to factors such as high temperature and vibration during use in Changan Car. However, what reassures us is that the relevant quality first department has put forward quite strict requirements on this technology.
For the actual detection method, the detection tools in the industry are all universal material testing machines, with a pressure plate fixture, so that the two components of the muffler are subjected to upper and lower related shear forces. The repeatability error of the measured results should be less than 5%.