Dongfeng coach car with the flat head coach precautions vehicle manufacturers

Dongfeng coach car engine cylinder once every work, go through intake, compression, for power and gas irresolute four cycle work process, specifically works as follows: 1, the intake stroke: an intake stroke, the intake valve opening , the exhaust valve closure. Piston down from TDC TDC Mobile, volume increases the piston crown side, creating a vacuum suction cylinder. Under the influence of vacuum suction, the combustible mixture formed by the intake valve carburetor is sucked into the cylinder. When the piston reaches bottom dead center, crank half weeks, the intake valve is closed, the end of the intake stroke. When the intake end, slightly lower than the gas pressure inside the cylinder outside atmospheric pressure. 2. compression stroke: compression stroke, the intake and exhaust valves are kept closed. When the piston from the bottom dead center point moves up dead volume above the piston is gradually reduced, the combustible mixture in the cylinder is compressed into the combustion chamber. When the piston reaches top dead center, the crank turned the second half of the week, end of the compression stroke. The end of the compression stroke, fuel flexible gas chamber 680 a pressure up to 1470 Pa dry temperatures up to 300 a 500 ℃. 3, the power stroke: the power stroke, the intake and exhaust valves remain in the fully closed state. When the piston approaches the point in time of flashover mounted in the cylinder head of a spark plug, igniting the compressed fuel mixture. Rapid combustion gas mixture, choose off a lot of heat, so that the cylinder pressure and temperature soaring up to a pressure of approximately 3000 kPa dry 5000, 1930, compared with a corresponding temperature 2537 ℃. Piston driven at high temperature and pressure of the gas from the bottom dead center TDC rapid movement, well driven crankshaft rotation, external work through the crank linkage. As the piston down, the cylinder internal volume is increased, the gas pressure and the temperature is gradually decreased, while as the power end, the cylinder pressure drops to 300 to 500 Pa dry, the exhaust gas temperature drops to 730-l130 ℃. 4, the exhaust stroke: exhaust gas after combustion of the combustible mixture must be discharged from the cylinder to allow fresh air into the combustible mixture. Thus, the exhaust stroke, the intake valve is closed, the exhaust valve opens, exhaust gas pressure and by the upward thrust of the piston to exhaust emissions, to prepare for the next intake cycle. When the end of the exhaust, cylinder pressure slightly above atmospheric pressure.