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Lotus Service Notes Section JJ Page 25 Anti-Lock Braking Maximum braking force is provided from a tyre when there is around 15% slippage, dependent on road surface conditions and tyre characteristics. The function of the ABS is to limit tyre slippage when braking to A high brake pedal pressure (or low road surface friction) may initiate the locking of one or more wheels. In the diagram below, a typical control strategy is shown: 1. Normal braking occurs until, as the applied pressure increases, the wheel speed signals received by the 2. The connection between the master cylinder and the LH front brake circuit is interrupted (by the isolation 3. If the wheel speed continues to depart significantly from vehicle speed, the dump valve is energised to 4. As wheel speed approaches that providing optimum grip, the isolation valve is pulsed open to allow a 5. As wheel speed begins to drop off and depart from vehicle speed again, a new cycle starts, repeating 6. When wheel speed increases sufficiently to meet vehicle speed, ABS intervention ceases, although |