how to measure rpm without a tachometer

• 2022-04-08

Now after driving for a long time, you don't have to look at the speedometer. You can shift gears naturally by feeling or listening to the sound. Driving also requires us to have a feeling of the car and achieve a natural and tacit understanding. Or the simplest and most direct way is to install a rpm tachometer. Because the engine work of each vehicle shows how much power output the engine will have at how many revolutions. You can listen to the sound when you increase the gear. If you have shifted to the highest gear and start to accelerate normally to a certain extent, the engine speed may have exceeded its maximum power output, but you can't know. Blindly increasing the throttle will not only consume fuel, but also cause no response from the car, which will only hurt the engine. If you are a novice, you have no experience to judge! When you can judge, maybe your car is almost bad. Therefore, it is suggested that you can install a tachometer to give you the most intuitive basis for correct operation. Hope to apply. If you still don't understand, you can ask someone who understands to help, or go to the repair shop to have a look.

If you want buy RPM Tachometer Gauge, you can check below picture, and you will find many RPM Gauges

About motorcycle , rely on testing sound frequency, measuring engine speed and experience. It also depends on testing the change frequency of exhaust pipe air pressure, which requires instruments and equipment. Or measure the voltage and frequency of the ignition circuit and find an oscilloscope or frequency meter. In addition, it can also be calculated according to the speedometer, gear and transformation ratio, which can be estimated by experience. The first method is the simplest. Find an experienced driver to estimate.

For car new driver, the most difficult thing is to shift gears. Generally speaking, when a novice is on the road, we recommend shifting according to the tachometer. Next, let's take a look at how to shift gears according to the tachometer. Generally, it refers to the behavior of changing gears adopted by manual gear owners when driving in order to obtain the transmission ratio corresponding to the vehicle speed. The current manual gear is generally 5-speed gear, with 5 forward gears of 1, 2, 3, 4 and 5, and 1 reverse. You can look at the tachometer first and shift gears according to the speed. Shift can be changed according to the vehicle speed and engine speed (listen to the sound of the engine). Generally, it depends on the engine speed for upshift, and it is recommended to judge the upshift time according to the existing vehicle speed (the engine is not subject to resistance and accelerates gently).