universal motorcycle speedometer and tachometer

• 2022-04-22

The tachometer of the motorcycle indicates the running speed of the machine per nanosecond. The speedometer indicates the running speed of the motorcycle and the avail of the motorcycle. The tachometer indicates the speed of the machine, and the number on it × 1000 indicates that the number of revolutions refocused by the pointer at that time is thousands of revolutions per nanosecond. Endured people can more master the working state of the machine and better control the number of revolutions of the machine. Generally, the speed of small relegation machines is controlled below the red line of 10000 revolutions per nanosecond.

The tachometer displays the engine speed in kilorpm, the speedometer displays the current wheel speed of the vehicle in km / h, and the odometer displays the cumulative mileage of the vehicle in km. The engine speed is related to the number of work done per unit time or the effective power of the engine, that is, the effective power of the engine changes with the speed. Therefore, when describing the effective power of the engine, the corresponding speed must be indicated at the same time.

Principle of odometer: in fact, its principle is very simple, because the diameter of the car wheel is known, and the circumference length of the wheel is constant. From this, we can calculate how many revolutions the wheel needs to turn for each mile, and this number is also constant. Therefore, as long as the number of revolutions of the wheel can be automatically accumulated, and then divided by the number of revolutions corresponding to each mile, the mileage can be obtained.

Such a simple principle was discovered by the ancients and began to be used. "Jili drum car" is such a device. It uses the above principle and ingenious mechanism to make the wheel beat the drum automatically every certain number of turns. At this time, as long as someone writes it down, you can get the mileage. This device is very ingenious. It can be used both day and night, and can also be used by the blind. It reflects the intelligence of the working people in ancient China. However, if no one on the bus remembers the number of drums, the drum car alone can not accumulate the total distance traveled. And no one knows how many miles the car has traveled after it stops, which is a flaw in the United States. The new car can run in 1000-1500 km! 300 change the oil once, 800 change the oil once, 1500 change the oil once; After running in, change the engine oil once 1500-2000. If you want good results, you can change 100, 300, 600, 1000 to complete the running in.