Cylinder Head Assembly: Description and Operation

The cylinder head is made of cast aluminum alloy and has four combustion chambers arranged inline. Each combustion chamber has an intake and an exhaust ports.

Moreover, as shown in figure, the air induction nozzle is provided near each intake valve.

During intake stroke of the engine, air/fuel mixture enters into the combustion chamber from throttle body through intake manifold and intake valve. At the same time, air flows to the air induction nozzle through throttle body and air induction passage in the intake manifold, and jets into the combustion chamber. The air jetted into the combustion chamber accelerates the mixture swirl to improve the combustion efficiency.

A single overhead camshaft driven by the crankshaft through the timing belt is mounted on the cylinder head.

The camshaft has eight cams, and each cam operates the intake or exhaust valve through rocker arm with hydraulic valve lash adjuster.