The ASR system prevents loss of traction in the drive wheels in two ways: firstly, ASR reduces loss of traction by using measured application of the brakes; secondly, the engine torque is regulated using the “electronic” accelerator pedal. For this reason, even with the gas pedal fully depressed, in an emergency situation the engine only produces a torque that the drive wheels can transfer to the road. It improves safety when moving off and balance during driving.
When a bus moves off from standstill, the system controls the speed of the drive wheels and the torque they receive. Based on the data obtained, it controls torque distribution in a way that prevents wheels from losing traction. This is how suitable traction between the road and the wheels is achieved.
The ASR system prevents drive wheels from losing traction during acceleration whilst also minimising the danger of the bus skidding. In this way, ASR enhances both comfort and safety when setting off, especially where buses have a powerful engine and different ratios of traction with the road pavement.