Electro-pneumatic braking system with deceleration control
AssigneeAllied-Signal Inc.
InventorWilliam A. Singleton
Life of this patent
Estimating the term…
Abstract
An electro-pneumatic vehicle braking system controls braking by electronic signals transmitted from a master controller to the brakes of the vehicle controlled by axle controllers. The master controller is responsive to the actuation of a treadle by the vehicle operator to calculate the difference between a requested vehicle deceleration and the actual vehicle deceleration, which is calculated based on data sensed by wheel sensors. Service braking pressure is then set to maintain the requested vehicle deceleration.
Claims18
Fluid pressure braking system for a vehicle having wheels and brakes controlling said wheels comprising wheel speed sensing means for generating a wheel speed signal which varies as a function of the rotational speed of a vehicle wheel, means responsive to said speed signal for generating a vehicle deceleration signal as a function of said wheel speed signal representing calculated deceleration of said vehicle, operator responsive means for generating an output signal, means responsive to said output signal for generating a deceleration request signal representing a requested vehicle deceleration desired by the vehicle operator, means for generating a difference signal as a function of the difference between said vehicle deceleration signal and said deceleration request signal, and means for controlling braking pressure communicated to said brakes as a function of said difference signal.
Fluid pressure braking system for a vehicle having wheels and brakes controlling said wheels comprising wheel speed sensing means for generating a wheel speed signal which varies the function of the rotational speed of a vehicle wheel, means responsive to said speed signal for generating a vehicle deceleration signal as a function of said wheel speed signal representing calculated deceleration of said vehicle, operator responsive means for generating an output signal, pressure request generating means responsive to said output signal for generating a pressure request signal, deceleration request signal generating means responsive to said output signal for generating a deceleration request signal representing a requested vehicle deceleration desired by the vehicle operator, means for generating a difference signal as a function of the difference between said vehicle deceleration signal and said deceleration request signal, and means for controlling braking pressure communicated to said brakes as a function of either said pressure request signal or said difference signal, said controlling means including mode switching means responsive to predetermined vehicle conditions from switching from a first mode in which the brakes of the vehicle are controlled by a signal which is a function of said difference signal to a second mode in which the brakes of the vehicle are controlled solely as a function of said pressure request signal.
Dependencies are inferred from the claim text.