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What does 'road' mean on a car?

1 Answers

McLydia

07/30/25 4:04am

On a car, 'road' refers to a differential lock. The function of a differential lock: A differential lock is a differential with an automatic locking function. Its purpose is to enhance the vehicle's ability to traverse poor road conditions. Specifically, when one of the vehicle's drive axles spins freely, the differential lock can quickly lock the differential, turning the two drive axles into a rigid connection. Standard differential: A standard differential allows the left and right wheels to rotate at different speeds. However, when one wheel spins freely, the other wheel on good road surface also fails to receive torque, causing the vehicle to lose driving power. In such cases, the differential becomes ineffective. By connecting the two wheels together, power can at least be transmitted to the other wheel, providing the vehicle with driving force to escape the predicament. This situation also applies to central differentials. As a result, various differential locking mechanisms have been developed.

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