advance auto parts tachometer

• 2022-06-15

Advanced auto parts include engine parts, auto lamps, electrical instrument accessories, etc., including tachometer.

The function of automobile tachometer is to let the driver master the engine speed and select the appropriate shift time. How to measure the automobile tachometer? When the engine cannot be started, connect the engine diagnostic instrument and check whether the speed parameter is normal when running the starting motor. (remove the connector) turn the digital multimeter to the ohm position, and connect the two probes to the 2\y and 3\y pins of the sensor respectively. The rated resistance is 860 Ω± 10% at 20 ℃. (connect the connector) turn the digital multimeter to the DC voltage gear, connect the two probes to the 2\y and 3\y pins of the sensor respectively, start the engine, and there should be voltage output at this time. (it is recommended to use an oscilloscope to check the vehicle) use an oscilloscope to observe the output voltage. The waveform should be observed, and the peak to peak value and frequency of the output waveform should increase with the increase of engine speed. Use the diagnostic instrument designated by the vehicle manufacturer to communicate with the EFI system ECU and read the fault data in the ECU, so as to judge the sensor failure.

The advanced auto parts tachometer is a value indicating the engine speed and power. After a certain speed, the gear needs to be upshifted, generally at 2000~2500 rpm. Some vehicles, such as Citroen, generally at 3000 rpm, can achieve the optimal power and speed. However, some of the vehicles that resist do not have a tachometer, such as the Fukuda scenic car, all rely on the feeling of the driver.

The maximum design speed of many automobile engines is 8000 rpm, but it is better to keep it at about 2500 during actual driving. If it is high-speed driving, it is better to keep it at 4500-5000, and it is better not to enter the 6000 red warning zone. The tachometer seems useless, but it plays a big role in the eyes of the old driver. For example, after the car is started, the engine speed instantly reaches 1200-1500 RPM in the initial stage, and it may be higher when the weather is cold, because too low speed will lead to flameout. It is faster to heat up the car if the speed is higher.