Ingeneral there are three core parts on the piston namely; Ring compression. This rings are elastic in function to prevent the occurrence of air leaks during the compression stroke. The way this ring works is to close the gap between the piston wall and the main linner. Oil ring. 2Stroke Engine Diagram As we learn before on 4 stroke engine diagram, there are four step on an engine cycle. Intake stroke; Compression stroke; Combustion FirstStroke in 2-Stroke CI Engine 26 Figure 2.1 shows one of the simplest two- stroke engines, viz., the crankcase scavenged engine As the piston starts moving from its BDC to TDC position, it closes the transfer port and the exhaust port. The air which is already there in the cylinder is compressed. At the same time with the upward DIESEL ENGINE WORK In the work of a 2-stroke diesel engine, all the work induction compression, power, and exhaust are completed in Inthis video, we will discuss Actual Valve Timing Diagram of two Stroke and four Stroke Petrol and Diesel Engine that is SI and CI Engine Port opening and C ThePower of Hirth. At Hirth we continually develop state-of-the-art technology applied to the proven two-stroke principle. Hirth Engines have been produced since the beginning of powered flight and our engineering excellence continues with performance and efficiency as the driving force in all our products. Figure1 and Figure 2 two simplified schematic diagrams of a four-stroke diesel engine and the isoengine are shown. As in all internal com- bustion devices, air is compressed, then fuel is added Abrief description of two-stroke engines is given in Section 2. The mathematical model, i.e., the governing equations are presented in Section 3 and the numerical model is discussed in Section 4. After that, the results are shown in Section 5 and the conclusion s of this chapter are discussed in Section 6. 2. Introduction to the two-stroke engine Sodue to these reasons a engine weather it is 2-stroke or 4-stroke is designed according to the valve timing diagram, so that the movement of piston from TDC to BDC is provided with the ideal timing of opening and closing of the intake and exhaust valves respectively. VALVE TIMING DIAGRAM FOR 4-STROKE ENGINE (PETROL AND DIESEL) Thetiming diagram for a two-stroke Diesel engine When defining parameters of substance changes in the two-stroke engine with fuel injection, the following symbols will be used: psc = scavenge air SJY9w3x.