What are the symptoms of an odometer sensor malfunction?
1 Answers
The symptoms of an odometer sensor malfunction are that the pointer of the car's odometer does not move, and the mileage does not increase. The speedometer can be divided into three types: purely mechanical, mechanical-electronic, and purely electronic. Here are the specific details: 1. Purely Mechanical: In a purely mechanical speedometer, the flexible shaft rotates at high speeds. Due to the hysteresis of its movement and the limitations imposed by the alternating stress limit of the steel wire, high-speed driving often causes the steel wire flexible shaft to fatigue and break, leading to the failure of the odometer function. As a result, purely mechanical odometers are gradually being phased out of the market. 2. Mechanical-Electronic: Compared to purely mechanical speedometers, the mechanical-electronic speedometer primarily replaces the flexible shaft with a sensor, overcoming the drawbacks of the mechanical speedometer such as pointer oscillation and the tendency of the flexible shaft to break. The transmitted photoelectric or magnetoelectric pulse signals are processed by the internal computer of the instrument and then displayed. 3. Purely Electronic: The purely electronic speedometer eliminates the error between the actual speed ratio and the theoretical speed ratio of the odometer's driving and driven gears, thus reducing the discrepancy between the vehicle's speed and mileage. Therefore, the readings of the purely electronic speedometer are more accurate than the previous two types. Additionally, the reduction in interacting transmission components lowers both the failure rate and cost, making it widely used in the domestic bus industry.
