What is the rpm in the speed?

Rpm is actually the abbreviation of revolutionminute, which means revolution minutes. The engine tachometer shows the speed of the engine crankshaft. The higher the crankshaft speed, the greater the engine throttle opening and the stronger the engine power. The maximum horsepower of most automobile engines will be output at high speed.

However, the higher the engine speed, the higher the fuel consumption.

When the engine is in the high-speed region, the number of times of doing work per unit time increases, so the number of times of fuel injection per unit time also increases. At this time, the engine speed is relatively high.

Most automobile engines have an economical speed range. When the engine is in the economic speed range, the engine is more fuel efficient.

However, when driving, the gear must match the engine speed and running speed. Only in this way can the car drive most comfortably.

Moreover, if the automobile engine runs in the high-speed area for a long time, it will accelerate the wear speed of the engine, which is not good for the engine.

Therefore, it is recommended that you don't let the engine of the car run at high speed for a long time.

The engine cannot be separated from the engine oil, and the long-term performance of the engine oil will decrease, so it is necessary to change the engine oil regularly.

It is recommended that you change the oil regularly when using the car.

Million car purchase subsidy