Take the working principle of a four-stroke engine and […]
Take the working principle of a four-stroke engine and a two-stroke engine as an example:
The four-stroke engine has a wide range of applications, and the four-stroke engine means that the piston fires once every four reciprocating cylinders. The specific working principle is as follows:
1. Intake: At this time, the intake valve opens, the piston descends, and the mixture of gasoline and air is sucked into the cylinder.
2. Compression: At this time, the intake and exhaust valves are closed at the same time, the piston is up, and the mixture is compressed.
3. Combustion: When the mixer is compressed to a minimum, the spark plug flashes to ignite the mixed gas, and the pressure generated by the combustion pushes the piston down and drives the crankshaft to rotate.
4. Exhaust: When the piston descends to the lowest point, the exhaust valve opens, the exhaust gas is exhausted, and the piston continues to move upward to exhaust excess exhaust gas.
The working principle of the two-stroke engine As the name suggests, the two-stroke engine is that the piston moves up and down two times, and the spark plug is fired once. The intake process of the two-stroke engine is completely different from that of the four-stroke engine. The two-stroke engine has to undergo two compressions. On the two-stroke engine, the mixture first flows into the crankcase and then flows into the cylinder. The mixture of the four-stroke engine flows directly into the cylinder. The crankcase of the four-stroke engine is used to store the oil. The two-stroke engine cannot store the oil because the crankcase is used to store the mixture. Therefore, the oil used in the second-stroke engine cannot. Recycled combustion engine oil.