Page 588 - Foton Workshop Manual - Auman EST-M

EG - 72 Engine section – Engine (Cummins ISF3.8)

Cylinder cover and valve
Overview

The role of the cylinder cover is to seal the cylinder, form a combustion space with the piston and withstand
the high temperature and high pressure gas. The cylinder cover withstands the gas force and the mechanical
load caused by fastening the cylinder bolt and withstands very high thermal load due to the contact with the
high temperature gas. In order to guarantee the good sealing of the cylinder, the cylinder cover can neither be
damaged nor deformed. For this reason, the cylinder cover shall have sufficient strength and rigidity.
The role of the valve is specifically responsible for inputting air into the engine and exhausting the exhaust
gas after combustion. From the engine structure, it is divided into the intake valve and exhaust valve. The role
of the intake valve is to inhale the air into the engine to mix with the fuels for combustion; and the role of the
exhaust valve is to exhaust the exhaust gas after combustion and release heat.

EG-072