Table of contentsIC enginePrinciple of operation of four-stroke gasoline engines Suction stroke: Compression stroke: Working or expansion stroke: Exhaust stroke: Principles of operation of 2-stroke gasoline engineIC engineObjectives: Explain the simple operation of the engineDescribe Operation of four-stroke engine and explain the purpose of each strokeDescribe the two-stroke engine and explain the principle of two-stroke operationAdvantages and disadvantages of two-stroke engines and four-strokePrinciple of operation of four-stroke gasoline enginesThere are four strokes which are as follows:Say no to plagiarism. Get a tailor-made essay on “Why Violent Video Games Should Not Be Banned”?Get Original EssayAspiration CourseCompression CourseExpansions or Work or Power StrokeExhaust CourseAspiration Course:The Aspiration Stroke begins with the piston at top dead center. During this stroke, the piston descends by means of the crankshaft. The inlet valve is open and the exhaust valve is closed. The partial vacuum created by the downward movement of the piston draws the new charge (mixture of air and gasoline) from the carburetor through the input value. The stroke is completed during the half revolution (180O) of the crankshaft, which means that at the end of the suction stroke, the piston reaches the lower center position of the head. Compression Stroke: During this stroke, the intake and exhaust valves are closed and the piston returns from the bottom dead center position. As the piston rises, the load is compressed. During compression, pressure and temperature increase. This rise in temperature and pressure depends on the compression ratio (in gasoline engines, the compression ratio generally varies between 6:1 and 9:1). Just before the end of the compression stroke, the charge is ignited by means of an electric spark produced at the spark plug. Working or expansion stroke: The ignition of the compressed load. Just before the end of the compression stroke, this causes a rapid, hidden increase in temperature and pressure in the cylinder. During this stroke, the intake and exhaust valves remain closed. The expansion of the gases due to the heat of combustion puts pressure on the piston, causing the piston to move downward, doing useful work. Exhaust Stroke: The exhaust value is open and the input value remains closed. The piston moves upward (from its BDC position) using energy stored in the flywheel during the working stroke. The upward movement of the piston exhausts the burnt gases through the exhaust value. At the end of the exhaust stroke, the piston reaches its TDC position and the next cycle starts. Working Principles of 2 Stroke Petrol EngineThe working principle of 2 stroke petrol engine is discussed below: 1st Stroke: To begin with, let us assume that the piston is at its BDC position. The arrangement of the ports is such that the piston performs two tasks simultaneously. As the piston begins to rise from its BDC position, it closes the transfer port and the exhaust port. The charge (mixture of air and gasoline) that is already in the cylinder, following previous operation of the engine, is compressed at the same time as the upward movement of the piston is created in the crankcase. (which is gas tight). As soon as the port of entry is discovered; the new change is sucked into the crankcase. Charging continues until the crankcase and the space in the cylinder below the piston are filled with charge. At the end of the third stroke, the piston has reached the TDC position. 2nd race: shortly before the end of..