what is a tachometer

• 2022-02-19

Although there are more and more people driving automatic stop cars, many people do not understand the role of engine tachometer. Today, when automatic stop is rampant, fewer and fewer people pay attention to tachometer. However, no matter how the development of fuel vehicles, the seemingly useless tachometer has not been eliminated.

As we all know, there is an engine tachometer on almost all car dashboards, but in today's automatic gear, most people only pay attention to the tachometer, not the tachometer, let alone the function of the tachometer? So what information can we read from the tachometer? What exactly does it do?On most models, the car tachometer is symmetrical next to the speedometer. The tachometer with "1 / min * 1000" written in the circle in the table is the tachometer.The automobile tachometer is generally a pointer instrument, and some of them are digital. It reflects the revolutions of the engine crankshaft per minute. The unit of measurement symbol is R / min, and the unit name is rpm.

The speed reflects the working condition of the engine. If the speed reflects the overall working condition of the vehicle, the speed reflects the working condition of the engine, which is one of the most important parameters of the engine.

Most of the designs of automobile tachometers are the same. Usually, the indicator of tachometer is multiplied by 1000 or 100 to obtain the engine speed per minute. This is very simple and can be understood by primary school students. For example, the engine is generally 700-1100r / min at idle speed.

I believe many car owners have encountered a problem, that is, they have been sitting in the car, so they have forgotten whether the car has started. Quietly tell you, I have encountered this situation several times, because the overall silence of the car is really good.At this time, the tachometer will come in handy. If you look at the tachometer, you can judge whether the car is in idle start state. The engine is generally 700-1100r / min at idle speed.So you can avoid the embarrassment of starting a fire again.For a car with manual gear, shifting according to the speed is more scientific, because the power point of each engine will be different, so the tachometer can help you better find the shift time.Mastering the correct shift time can make the engine run more smoothly and accelerate more smoothly and effectively, so it is more fuel-efficient and has lower emissions.Generally speaking, if you want to save fuel, it is recommended to shift between 2000 and 3000 revolutions.The Chevrolet manual is quoted as saying that the maximum fuel efficiency can be achieved when driving at a lower speed between 2000 and 3000 revolutions.