Traction control system having pilot operated valves

摘要

A hydraulic braking system providing anti-lock braking ("ABS") and traction control ("TC") incorporates a normally closed pilot-operated traction control switching valve to permit brake pressure in the driven wheel greater than master cylinder pressure. A dual flow return path can be used during brake release. The system also uses a normally open pilot-operated supply valve between the pump inlet and the master cylinder. The normally open pilot-operated valve references a low pressure fluid source and uses low friction seals.