what is the tachometer used for

• 2022-02-19

You should also often observe the tachometer when driving. On the one hand, you can better control the car, on the other hand, you can find the fault of the car as soon as possible.

Similarly, without a tachometer, there are problems in the initial stage, which can not be quickly eliminated. This is the purpose of the tachometer. If the instantaneous speed is lower than 1200, there may be something wrong with the engine, such as serious carbon deposition on the throttle. The tachometer can also indicate the shift timing of manual gear. Generally, the shift is the most smooth and fuel-efficient at about 2500 revolutions, and the power required is more than 3000. Therefore, pay attention to the speed when driving. Too low (below 2000r / min) not only lacks power, but also easy to form carbon deposition. If the fuel consumption is too high (4000R / min), it will cause permanent damage to the engine if it reaches the red line. Fortunately, most engines have speed limit function, which won't let you drive your family car as a racing car. Some cars are very quiet at idle speed. People like you may forget that the car is still starting. In this case, you won't make mistakes by looking at the tachometer.

The rules of manual gear upshift and downshift are to make the engine work within the optimal speed range as far as possible.The purpose of upshift is to reduce the engine speed and make lower energy consumption, while the purpose of downshift is to add the engine speed and give full play to the power and increase the fuel consumption. Specifically, refer to the speed range recommended in your manual. The shift timing is different for different cars and different driving orientations. Specifically, refer to your own owner's manual.After knowing the area of the tachometer, you can easily and intuitively know whether the speed of the car is within the safe range. There are several areas on the tachometer. The white scale area represents that the current speed of the vehicle is within the safe speed range, while the red scale area represents the range of dangerous speed, and some models also have green areas, representing the economic range.The speed is a barometer of the working state of the engine. Many old drivers or maintenance masters can judge whether there is a problem with the car by the movement of the tachometer pointer when the engine is idling.If the idle speed of the engine is high or low and the speed is unstable under normal conditions, it basically indicates that there is a fault in the engine.To sum up, it makes sense to put the car tachometer in a prominent position.