Patent ID: 6132013
Filing Date: 2000-10-17
Classification: B60T

Abstract:
A vehicular anti-lock and traction control braking system comprising:a master cylinder;a driven wheel brake connected to the master cylinder via a first brake conduit;a non-driven wheel brake connected to the master cylinder via a second brake conduit;a fluid supply;a pump having in input connected to the fluid supply and an output for providing pressurized fluid to the driven and non-driven wheel brakes;a pump supply valve disposed between the pump inlet and the fluid supply;a driven wheel, normally open isolation valve disposed in the first brake conduit between the driven wheel brake and the master cylinder which is opened to allow fluid communication therebetween and closed to prevent fluid communication therebetween;a driven wheel, normally closed dump valve disposed in the first brake conduit between the driven wheel brake and the pump inlet which is opened to allow fluid communication therebetween and closed to prevent fluid communication therebetween,a non-driven wheel, normally open isolation valve disposed in the second brake conduit between the non-driven wheel brake and the master cylinder which is opened to allow fluid communication therebetween and closed to prevent fluid communication therebetween, wherein the non-driven wheel isolation valve is opened during a traction control mode to provide a circular fluid path from the pump output through the non-driven wheel isolation valve to the pump inlet; anda non-driven wheel, normally closed dump valve disposed in the second brake conduit between the non-driven wheel brake and the pump inlet which is opened to allow fluid communication therebetween and closed to prevent fluid communication therebetween.