![]() ![]() When it gets closed it seals the combustion chamber tightly and therefore it restricts another fuel to come in. In the starting the temperature of the mixture is low. Through the Inlet valve, the mixture enters into the cylinder. This diagram is an actual valve timing diagram.The Inlet valve is made up of nickel-chromium alloy steel. The exact moments of opening and closing valves with reference to the piston and crankshaft are shown graphically in the figure. In actual practice, the above cycle is slightly modified. The pressure in the cylinder is reduced and the scavenging process starts. This time also crankshaft rotates 180 degrees. ![]() rushing out the burnt gases from the cylinder. The exhaust valve opens and the inlet valve remains closed. The pressure is much higher in this stroke compared to the atmospheric pressure. This time also crankshaft rotates 180 degrees. A sudden thrust is placed on the top of the piston and the adiabatic process starts. Sparking takes place from the spark plug which is the compressed charge. ![]() Power stroke-īoth valves remain closed in this stroke. This time crankshaft rotates 180 degrees. This time the pressure and the temperature are increased in the cylinder. The piston starts to move upward thus compressing the charge till it reaches the T.D.C. Compression stroke-īoth the valves remain closed. A fresh charge of air fuel enters the cylinder. The piston starts to move down from the top dead (T.D.C.) position and reaches the bottom dead center (B.D.C.) position. The opening and closing of valve reference to the position of the piston and crankshaft during the four strokes are described as follows: Suction Stroke. The theoretical valve timing diagram for a four-stroke Otto cycle engine is shown in Fig. The exhaust valve opens exactly at the beginning of the exhaust stroke and closes at the end of the stroke. Both the valves remain closed during compression and power strokes. Theoretically, the inlet valve opens exactly at the beginning of the suction stroke and closes at the end of the stroke. This diagram is known as the valve timing diagram. The exact moment at which each of the valves opens and closes with reference to the position of the piston and crank can be shown graphically in a diagram. It has already been explained in the operation of a four-stroke, Otto cycle engine that the inlet valve pens during the suction stroke and the exhaust valve open during the exhaust stroke. Valve timing diagram Theoretical Valve Timing. Leading Car Manufactures in India: r/Suzuki, r/Hyundai, r/Mahindra, r/Honda, r/Tata Popular media outlets are autocar, overdrive, ndtv car&bike, zigwheels etc. In FY 2014–15, automobile exports grew by 15 per cent over the last year. India is also a prominent auto exporter and has strong export growth expectations for the near future. The overall Passenger Vehicle segment has 13 per cent market share. The Two Wheelers segment, with 81 per cent market share, is the leader of the Indian Automobile market, owing to a growing middle class and a young population. The automobile industry accounts for 7.1 per cent of the country's gross domestic product. India is 5th largest passenger vehicle market in the world. Post links to news, or text post for any queries etc. This is the place on reddit india cars discussions converge. A definitive online community on reddit Indian cars. CarsIndia is for automobiles news and discussion. ![]() News, reviews and discussion on India cars, suv's and other automobiles. ![]()
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