Cylinder Head Assembly: Description and Operation

The cylinder head is made of cast aluminum alloy and has four combustion chambers arranged in-line. Each combustion chamber has an intake and exhaust port. 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 the throttle body through the intake manifold and intake valve. At the same time, air flows to the air induction nozzle through the 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 a rocker arm.