Performance of Antilock Brakes with Simplified Control Technique

The four-wheel controlling antilock brake system is considered as an effective safety device because of its capability to help a driver to maintain vehicle stability and steerability during panic braking even on a slippery road surface.

This report deal with a simplified control technique which simultaneously controls right and left wheels on each front or rear axle. Both front wheels are controlled in response to a signal from the front wheel with the least slip, while both rear wheels are controlled in response to a signal from the rear wheel that has the greatest slip.

A series of tests proved that this technique ensures vehicle steering ability even during panic braking. On a gravel and other rough roads, this system provided shorter stopping distance compared to other four-wheel antilock systems. It has been generally assumed that stopping distance extension on such roads is only one disadvantage of the four-wheel antilock brake system.