초록 ▼

A dynamic rear proportioning system is integrated with an existing vehicle anti-lock braking system (ABS) and performs the function of the rear brake pressure proportioning where ABS is not required. The rear brake hydraulic channel(s) are isolated from the master cylinder by activating the rear iso

A dynamic rear proportioning system is integrated with an existing vehicle anti-lock braking system (ABS) and performs the function of the rear brake pressure proportioning where ABS is not required. The rear brake hydraulic channel(s) are isolated from the master cylinder by activating the rear isolation valves, provided in the ABS, to provide the optimum brake force balance, regardless of vehicle loading, without the use of a load sensing mechanism. The system estimates vehicle and wheel deceleration, vehicle speed, and lateral acceleration as well as the rear wheel slip to dynamically control the rear brake force. By continually updating these control parameters, the system can further increase or decrease the rear brake pressure to maintain the optimum brake force balance throughout the braking maneuver.

대표청구항 ▼

A brake pressure control method for a vehicle having a front and a rear wheel, and control means for controlling the pressure at said wheels, said method comprising a sequence of the steps of: calculating a rear proportioning mode activation threshold as a function of predetermined vehicle parameter

A brake pressure control method for a vehicle having a front and a rear wheel, and control means for controlling the pressure at said wheels, said method comprising a sequence of the steps of: calculating a rear proportioning mode activation threshold as a function of predetermined vehicle parameters; initiating a dynamic rear proportioning (DRP) mode of automatic brake pressure control of said rear wheel if the estimated vehicle speed is above a low speed limit and said activation threshold exceeds a predetermined value; suspending said dynamic rear proportioning mode and transitioning to an active anti-lock braking (ABS) mode of automatic brake pressure control of said rear wheel upon detection of an incipient skid condition of said rear wheel; terminating said active anti-lock mode of operation of said rear wheels and transitioning to said dynamic rear proportioning mode upon recovery of said rear wheel from said incipient skid condition; terminating said dynamic rear proportioning mode when said value is no longer exceeded or a predetermined interval of time after said vehicle speed drops below said low speed limit.