panel mount digital tachometer

• 2023-08-08

Today's cars are becoming more and more electrified. Automatic transmissions, reversing cameras, electronic aids and other devices have been completely popularized in many domestic vehicles, which are close to semi-automatic driving. At this time, there are many parts or functions on the car, such as CD player, mechanical key and Tachometer. I believe many people are confused. Almost no one will notice the Tachometer, But why should it be placed in the most prominent position? There must be some truth in some running patterns. Now let's see what functions the Tachometer has. 

The Tachometer is generally set in the instrument panel and symmetrically placed with the speed Odometer. The Tachometer works according to the principle of magnetism. It receives pulse signals generated when the primary current in the live coil is interrupted. And convert this signal into the speed value that can be displayed. The faster the engine speed is, the more pulses the ignition coil generates. The greater the speed value displayed on the meter, the greater the speed value is. The unit of the Tachometer is 00, that is, the number of kilorevolutions per minute of the engine is displayed. The Odometer is marked with km, and the number of Tachometer is only about 1~8. Multiply the number pointed by the pointer by 1000 to get the engine speed. 

How should we check the Tachometer in our daily use? Firstly, it is necessary to regularly observe whether the engine can run smoothly at various speeds. For example, whether the engine speed is stable when idling, whether the speed is high or low, whether the engine speed climbs smoothly and smoothly during acceleration , whether the engine speed drops smoothly during deceleration, whether the maximum engine speed is too low, and so on. 

These parameters can all reflect the working status of the engine, such as unstable idle speed indicating dirty throttle or faulty ignition system, low maximum speed indicating decreased engine performance, possibly due to excessive fuel supply system or mechanical wear. Secondly, you can check the gear shifting of the transmission through the Tachometer. For manual transmission models, you can also switch gears according to the Tachometer to select the appropriate gear shifting time. For automatic transmission models, when the transmission is upshifted, the engine speed will decrease, and when the transmission is downshifted, the engine speed will increase. We can judge whether the transmission works normally by checking the shift speed of the transmission.