Functioning process of diesel generator exhaust stroke:
The pressure public relations at the end of the exhaust stroke has to do with 0.105 ～ 0.115 MPa, and also the temperature of the residual exhaust gas is about 850-960K. Since the access as well as exhaust valves are closed early and late; at the end of the exhaust thrill and the beginning of the air intake, the piston is near the upper stop point, and the exhaust shutoff is opened up for a period of time. Time is stood for by a crankshaft corner.
After the exhaust stroke mored than, the air intake was started, so the whole work cycle was repeated according to the above process. Due to the fact that the working cycle of this diesel engine is finished by 4 piston strokes, that is, the crankshaft rotation is completed, it is called a 4 -stroke diesel motor.
In the four hurries of the four -stroke diesel engine, only the functioning trip produces the motivation to work, and also the remaining 3 strokes are a job -consuming preparation process.
In order to make use of the airflow inertia throughout exhaust, the exhaust gas was released clean, as well as the exhaust valve was shut after the upper end factor. The exhaust stroke curve suggests that during the exhaust process, the gas stress in the cylinder is nearly unchanged, however it is somewhat higher than the atmospheric pressure.
Because of the resistance of the exhaust system, at the beginning of the exhaust stroke, the gas stress in the cylinder plus the atmospheric pressure was 0.025-0.035 MPa, and also its temperature level TB = 1000 to 1200K. In order to lower the resistance of the piston throughout exhaust, the exhaust valve opened before the reduced factor. As quickly as the exhaust shutoff was opened, the gas with a particular stress promptly rushed out of the cylinder, as well as the pressure in the cylinder dropped rapidly. In this way, when the piston relocated up-wards, the exhaust gas in the cyndrical tube counted on the piston upwards.
Post time: May-29-2023