The car has a speed indicator, so the speed of the car can be controlled by itself. During driving, the engine speed of the car is around 2200-2500. No matter which gear is engaged, the engine speed will remain around 2200-2500. Overspeed will increase ineffective fuel consumption and damage the engine.
Tachometer is one of the necessary instruments in machinery industry, which is used to measure the speed, linear speed or frequency of motor. It is often used in manufacturing industries such as motors, electric fans, paper making, plastics, chemical fibers, washing machines, automobiles, airplanes and ships. The most commonly used is the hand-held centrifugal tachometer. Tachometer measurement is essential in all fields of national economy.
Influence of too high engine tachometer
If the tachometer is too high, all parts of the vehicle will be subjected to excessive torsion (engine, gearbox, tires, etc. ), resulting in reduced service life. At the same time, it will also lead to an increase in fuel consumption, too fast speed and reduced safety. Too high a speed can easily burn out the engine. Engine speed is too high. From a professional point of view, the higher the throttle opening, the higher the speed will be. The throttle of a gasoline engine controls the throttle opening instead of the fuel injection quantity.
That is, if the opening is small and the mixture entering the cylinder is small, the power generated by the engine will be small, and vice versa. The more air and mixed gas enter the cylinder, the greater the force generated by combustion, so the greater the force pushing the piston, the faster the piston moves, and the faster the engine speed.