Process2-3 (Isochoric Ignition Stroke) As the name suggests, this is the stage where the fuel ignition is achieved with the help of an electric spark following the consequent rapid combustion of petrol (fuel). PV Diagram of Diesel Engine p-v Diagram for the Ideal Diesel cycle. The cycle follows the numbers 1-4 in a clockwise direction.
Thepressure volume diagram (PV diagram) that models the changes the fuel-air mixture undergoes in pressure and volume in a four stroke engine is called the Otto cycle.The changes in these will create heat, and use this heat to move the vehicle or machine (hence why it's a type of heat engine).The Otto cycle can be seen in Figure 2 (real Otto Cycle) Followingfig shows the PV diagram of the two-stroke engine. Remember. The incoming fresh charge pulls out burnt gas. This process is known as scavenging. In direct fuel Dieselengine is a compression ignition engine of a 2- or 4-stroke type. From the p − V diagrams (Fig. 2.1), it can be seen that the duration of the whole diesel cycle is 360°CA for the two-stroke engine and 720°CA for the four-stroke engine.The whole cycle consists of the following phases: intake of air, compression of air, fuel injection, mixture Gasengines – propane, butane or methane gases are used. 3. Based ignition of fuel. Spark ignition engine (Carburetor type engines) Compression ignition engine ( injector type engines) Spark ignition engine – a mixture of air and fuel is drawn in to the engine cylinder. Ignition of fuel is done by using a spark plug.