Performance testing of automotive parts

Release time: 2023-02-14

A, engine cylinder sealing test

There are seven factors affecting the cylinder sealing, mainly cylinder wear, piston ring damage, piston wear, valve seat damage, valve guide wear, cylinder gasket damage, valve clearance and several other aspects of the problem.

What are the common diagnostic methods? Mainly have the measurement of cylinder pressure, crankcase airflow, cylinder leakage and leakage rate, intake pipe vacuum, cylinder piston group due to excessive wear caused by the vibration measurement of the strange sound, crankcase wear metal is the determination of particle content.

For the measurement of cylinder compression pressure, this is mainly the pressure at the end of compression in four-stroke engines. Due to the pressure of the cylinder and the viscosity of the oil as well as the cylinder piston group and other matching conditions, whether the adjustment of the air distribution mechanism is correct, the sealing of the cylinder gasket and other factors, so, when measuring the pressure of the engine cylinder, you can diagnose the sealing of the cylinder piston group, if the piston ring, valve, cylinder gasket sealing if good, then the valve clearance must be appropriate.

Second, silencer firmness test

The silencer has an outer barrel and internal honeycomb parts, two parts are combined together by a mechanical cladding process 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 in the use of the car will be caused by high temperature, vibration and other factors caused by loose or off. However, we are reassured by the fact that the relevant quality first authorities have imposed fairly stringent requirements on this technical aspect.

For the actual testing method industry testing tools are used universal material testing machine, with the compressive disc jig, so that the silencer two components subject to the relevant shear force up and down. The measured results should be less than 5% repetition error.

Third, the interior testing

The interior trim includes the seat forming materials, interior box decorative materials and adhesive with sticky. Mainly test its safety: 1. gas harmfulness 2.

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