1
What is?
of the piston slides within the cylinder is a hollow cylinder, an outer diameter approximately equal to the inner diameter of the piston cylinder.
2
Function
receiving the combustion pressure in the cylinder, and this force to the crank and connecting rod through a piston pin. In addition, the piston and also the cylinder head, a combustion chamber together constitute cylinder wall.
3
Structure
the entire piston can be divided into the piston crown, a piston head and a piston skirt 3 parts.
4
environment
of the piston at a high temperature, high pressure work at high speed, poor lubrication conditions. Hot gas in direct contact with the piston, the instantaneous temperatureUp to 2500K or more, therefore, severe heat, and cooling conditions is very poor, so that when the piston working temperature is high, up to the top 600 ~ 700K, and the temperature distribution is not uniform; top of the piston to withstand the gas pressure, in particular for power the maximum pressure stroke, gasoline up to 3 ~ 5MPa, diesel up to 6 ~ 9MPa, which have an impact on the piston, and the pressure receiving side effect; the piston in the cylinder at high speed (8 ~ 12m / s) to reciprocate, and the speed is constantly changing, which had a great inertia force by the piston significant additional load. Piston working in such harsh conditions, will produce distortion and accelerated wear, but also have additional loads and thermal stress, while the chemical etching action by the gas.