The engine speed is the best in the range of 2000-4000, which is the so-called healthy speed range. Too low or too high a speed is unacceptable. If it is too low, the fuel will burn incompletely, and carbon deposit will easily damage the engine. If it is too high, the engine cylinder and gearbox gear will be seriously worn, which is not good for the engine.
Extended data:
Tips for daily use of fuel economy:
1, keep the speed even when driving.
The average vehicle's economic speed is between 60 and 90 kilometers per hour, which is the most fuel-efficient. Too high or too low a speed is not conducive to fuel saving. When the vehicle speed is too low, the movement speed of the piston is low and the combustion is incomplete. When the vehicle speed is too fast, the increase of intake speed leads to the increase of intake resistance.
2, control the best speed
When driving, the engine speed of the general EFI car is around 2200-2500. No matter which gear, it is most fuel-efficient to keep the engine speed at around 2200-2500.
3. Control the shift speed
When shifting gears, add a little more oil than normal driving state, so that the speed reaches a little more than 2500. When shifting gears below 2000 rpm, the speed will decrease after shifting, and there will be a feeling of shifting gears. You have to refuel to get it back, but you will consume more fuel.
4, reduce unnecessary braking
Braking is essentially an energy conversion, and braking means energy consumption. Therefore, when passing the intersection, downhill and ahead, increase the throttle in advance to prepare for deceleration, thus reducing the number of emergency braking.
Avoid frequent starting or idling for a long time. Starting the vehicle will consume a lot of battery power. Frequent starting will not only increase the load of the battery, but also increase fuel consumption. It is easy to produce carbon deposit and reduce the fuel consumption rate of the engine without stalling at idle speed.
References:
Phoenix Net-How many revolutions of engine speed is qualified?
People's Network-Fuel Saving Tips for Daily Cars