how to use a tachometer

• 2022-01-07

In front of the driver's seat side of each vehicle, there are two important instruments, engine tachometer and vehicle running speed meter. These two instruments are closely related to the running condition of the vehicle engine and the driving condition of the vehicle, which is the basic knowledge that every driver should master.

For novice drivers, they should pay attention to the instrument panel frequently when driving. On the one hand, they look at the speedometer and worry about driving faster; On the other hand, look at the tachometer to see if it's going to shift. For some rookies, I don't know anything except that the driving school master said that when the speed is up to 2000, the tachometer becomes the speed. Next, let's look at how the car tachometer looks and how much is normal?

What do you think of the tachometer?

The design of the tachometer of each manufacturer is roughly the same. Generally, the tachometer indication multiplied by 1000 or 100 is the engine speed per minute. For example, the engine is generally 700-1100r / min at idle speed, that is, 700-1100 rpm. If the speed reflects the overall working condition of the vehicle, then the speed reflects the working condition of the engine, which is one of the most important parameters for starting.

How much is the car tachometer normal?

Generally speaking, the tachometer is divided into several areas. The white scale area is the safe speed range, the red scale part is the dangerous speed range, and some models are also divided into green areas, which indicates that the speed is the most economical use range of the engine. Generally speaking, the vehicle speed is normal when it does not enter the dangerous speed range, but pay attention to whether the vehicle speed is consistent with the current gear, otherwise low gear, high speed or low-speed and high-grade will bring unnecessary damage to the vehicle.

Different models will be different. There is no absolute value for this. Generally speaking, when the vehicle starts, the engine speed will reach about 1200-1500 revolutions, which is because the low speed leads to easy flameout when starting; When the engine working condition is normal, the engine speed will drop, generally about 800 rpm; When shifting, generally shift around 2000-2500 rpm. At other times, as long as the engine speed is not too low or too high, do not stay in the red dangerous area for a long time, which will cause damage to engine parts.