Simple 4 stroke petrol engine diagram. Valve timing is the regulation put on the engine valves how they set to open and close during working cycle. Valve timing diagram for 4 stroke engine petrol and diesel as we all know in 4 stroke engine the cycle completes in 4 strokes that are suction compression expansion and exhaust the relation between the valves inlet and outlet and piston movement from tdc to bdc is represented by the graph known as valve timing diagram. 4 stroke petrol engine animation the earlier generation petrol engine used carburettor to supply petrol to the engine. A four stroke also four cycle engine is an internal combustion ic engine in which the piston completes four separate strokes while turning the crankshaft.
As the name suggest the four stroke petrol engine uses a cycle of four strokes and petrol as the fuel. The newer generation petrol engines use sophisticated fuel injection technology just like diesel engines with an engine management system for improved performance and lower emissions. The diagram shows the timing of opening and closing of intake and exhaust valve during one complete cycle of four strokes. Also known as induction or suctionthis stroke of the piston begins at top dead center tdc and.
The p v diagram for a 4 stroke engine is as follows. For the love of physics walter lewin may 16 2011 duration. This videos illustrates the working of 4 stroke engine with all the four strokes explained and also at the end a real time animation at 5000rpm. Port timing diagram of two stroke engine what is meant by valve timing of engine.
The four separate strokes are termed. Each cycle includes 2 rotations of the crankshaft and four strokes.