초록 ▼

The present invention provides an apparatus and method of utilization thereof of a traction control system for automotive vehicles. The inventive traction control system provides selective hydraulically actuated braking to a drive wheel which is spinning to restrain rotation thereof so that torque t

The present invention provides an apparatus and method of utilization thereof of a traction control system for automotive vehicles. The inventive traction control system provides selective hydraulically actuated braking to a drive wheel which is spinning to restrain rotation thereof so that torque to that respective wheel may be increased.

대표청구항 ▼

A traction control system for a vehicle having a plurality of powered wheels, with at least two of said wheels having fluid actuated brakes, said system also having a master cylinder responsive to the command of a vehicle operator to supply fluid to said wheel brakes, said traction control system in

A traction control system for a vehicle having a plurality of powered wheels, with at least two of said wheels having fluid actuated brakes, said system also having a master cylinder responsive to the command of a vehicle operator to supply fluid to said wheel brakes, said traction control system in combination comprising: a first mechanical hydraulic system for selectively supplying pressurized brake fluid to a respective wheel brake or withdrawing brake fluid from said respective wheel brake independent of said master cylinder; sensing means to determine the rotational displacement of said respective wheel and means to compare said wheel rotational displacement with the displacement of said vehicle and to generate a signal in response thereto; a first control valve means normally closed allowing communication between said first mechanical hydraulic system and said wheel brake in response to said signal from said sensing means; isolating valve means, normally opened allowing fluid communication between said respectively wheel brake and said master cylinder to allow operator actuation of said wheel brake, said isolating valve means in a closed position preventing fluid communication between said wheel brake and said master cylinder when said first mechanical hydraulic system is in communication with said wheel brake, said isolating valve means including a valve member for making contact on a valve seat to prevent fluid communication between said master cylinder and said wheel cylinder, and said isolating valve means including a shuttle valve separate from said valve member for moving said valve member, said shuttle valve communicating with a pressurized line separate from said master cylinder line communicating with said valve member; hydraulic means to latch said shuttle valve means to a position wherein said valve member is in a closed position when said first mechanical hydraulic system is supplying or withdrawing brake fluid from said brake cylinder; and hydraulically-actuated means to override said first control valve means to return said isolating valve means to said open position, said hydraulically-actuated means including moving said shuttle valve to allow said valve member to return to an open position whereby there is again fluid communication between said master cylinder and said brake cylinder and whereby said operator can again control said wheel brakes.