How is a car's mileage calculated?
1 Answers
Calculated through a mechanical odometer or electronic odometer. The following is a related introduction about odometer mileage calculation: 1. Mechanical odometer: The mechanical odometer consists of a worm gear mechanism and number wheels. When the car is moving, the drive shaft drives the first number wheel on the far right of the odometer through three pairs of worm gears, displaying 1/10km on the first number wheel. From the first number wheel to the left, every two adjacent number wheels form a 1:10 transmission ratio through their internal teeth and carry-over gears. When the first number wheel completes a full rotation from 9 to 0, the internal gear drives the second number wheel to rotate 1/10 of a turn, increasing the count by 1km. When the second number wheel completes a full rotation from 9 to 0, the third number wheel to its left rotates 1/10, increasing the count by 10km. The display and counting method of the remaining number wheels, from low to high, follow the same principle, thus displaying the car's mileage. 2. Electronic odometer: The electronic speed odometer consists of a speed sensor (installed on the worm gear component of the transmission on the wheel, either photoelectric or magnetoelectric), a microcomputer processing system, and a display. The photoelectric or magnetoelectric pulse signals transmitted by the sensor are processed by the microcomputer inside the instrument and displayed as speed on the screen. The odometer calculates and displays the mileage based on the speed and accumulated running time, processed by the microcomputer.
