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Question:

Car speed and wheel speed

What is the relationship between the wheel speed and the speed of the car? Usually we said the speed sensor is measuring the wheel speed? What is the speed of the car?

Answer:

Wheel speed is to reflect the speed of car driving, is measured with a wheel speed sensor, that is, ABS wear sensor. The speed sensor is usually installed in the gearbox output shaft. Refers to the gearbox output torque! The speed of the car is measured with a wheel speed sensor!
The sensor measures the tire speed
apple! The more expensive the better?
Two concepts, speed and wheel speed difference, the speed is the speed of the car, the wheel speed is the speed of rotation of the wheel, due to the sliding between the wheel and the ground, there is a certain rate of sliding, the two are not equal. ABS needs to rely on vehicle speed sensor and wheel speed sensor to adjust the sliding rate. At present, the speed signal acquisition depends on Doppler radar as a sensor, the price is more expensive. Generally take the logic threshold control method, that is, only the use of wheel speed sensor single parameter sensing mode, through the wheel speed signal, ECU estimated car speed.

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