Volt

Engine Component Description

The cylinder block is a hollow frame structured in-line 4 cylinder. The block has 5 crankshaft bearings with the thrust bearing located on the third bearing from the front of the engine.

The crankshaft is a steel crankshaft. It is supported in 5 main journals with main bearings which have oil clearance for lubrication. The 3rd bearing which controls the proper axial end play of the crankshaft.

The engine is equipped with a variable oil pump. The oil pump is integrated into the engine front cover and provides different oil pressure values depending on the engine speed.

The sump is a structural aluminium sump with transmission attachment points. The oil suction gallery for the oil pump is integrated into the sump.

The pistons are aluminium pistons. The connecting rods are made of fractured steel. The piston pin is floating in piston bore and shrinked in connecting rod.

This cylinder head is a double over head camshaft (DOHC) type and has 2 camshafts that open 4 valves per cylinder with hydraulic valve clearance adjusters and hydraulic valve clearance adjuster arms. The cylinder head is made of cast aluminum alloy for strength and hardness whole remaining light weight. The combustion chamber of the cylinder head is designed for increasing of squish and swirl efficiency to help maximise petrol combustion efficiency.

A timing chain is used for camshaft drive. There is a tensioner to control the tension of the chain. The engine is equipped with a variable camshaft timing system. The camshaft adjuster will readjust itself depending on the engine speed. The valve timing readjusts to reduce fuel consumption and provides optimal power and torque. The variable camshaft timing makes an exhaust gas recirculation unnecessary.

The inlet manifold provides the air flow passage to the combustion chambers through the throttle body. The inlet manifold along with the throttle body have an effect on engine torque, power, noise, driveability, emission, fuel economy and performance. The inlet manifold is made of plastic for better strength while maintaining light weight.

The exhaust manifold is located to the cylinder head and channels the exhaust gas out of the combustion chamber. It is designed to endure on high pressure and high temperature. The exhaust manifold includes the catalytic converter.