The piston needs to complete four strokes of intake compression, work and exhaust in the cylinder to complete a working cycle. in this period
During this time, the piston moves up and down in the cylinder twice, and the crankshaft rotates twice at the same time.
Just take a look at the tachometer on your car and you'll know how fast this process is. If the pointer of the tachometer points to 6, it means that the engine speed at this time is 6000 revolutions per minute, and the total is 100 revolutions per second, then one piston will complete 50 working cycles per second (the crankshaft will rotate 2 in one working cycle). weeks), that is to say 50 explosions in one cylinder. If it is a one-cylinder engine, then 4 cylinders will have 200 explosions in 1 second. The whirring sound when the engine is working is actually the sound of the explosion when the fuel burns.
In the same way, if the pointer of the tachometer points to 3, it means that the engine speed is 3000 revolutions per minute at this time, and the total is 50 revolutions per second, then one piston will complete 25 working cycles per second, that is to say, in a 25 explosions in the cylinder. If it is a 4-cylinder engine, then 4 cylinders will have 100 explosions in 1 second.
