Fluid-pressure and analogous brake systems – Multiple systems – Fluid pressure and electric
Patent
1986-05-30
1987-12-15
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Multiple systems
Fluid pressure and electric
188195, 188158, 303 15, 303 20, 303100, 303107, 303 22R, B60T 1366, B60T 1374
Patent
active
047128399
ABSTRACT:
An electronically controlled braking system for a vehicle in which vehicle load measurements, made dynamically, as used to modify the braking demand, individually for each axle of the vehicle and in which, under predetermined conditions of vehicle speed, braking level and operating gradient, the deceleration error formed between braking demand by the driver and measured actual vehicle deceleration is used gradually, over a number of vehicle stops, to form an adaptive factor for correcting the braking demand in order to restore expected braking performance. No correction to the adaptive factor based on the deceleration error is made during a given stopping operation of the vehicle, but a summation of previous errors is arranged to cause a small increment in correction to be made after each stop until, over a number of vehicle stops, the error formed under the predetermined conditions falls to zero. Braking demands by the driver can be arranged to be compensated by introducing a demand offset dependent on the prevailing gradient on which the vehicle is operating.
REFERENCES:
patent: 4425006 (1984-01-01), Bertrand et al.
patent: 4610484 (1986-09-01), Amberg et al.
patent: 4624506 (1986-11-01), Doto
patent: 4631514 (1986-12-01), Fujiwara
patent: 4632466 (1986-12-01), Grauel et al.
patent: 4657310 (1987-04-01), Klein
patent: 4659149 (1987-04-01), Rumsey et al.
patent: 4671577 (1987-06-01), Woods
Brearley Malcolm
Moseley Richard B.
Butler Douglas C.
Lucas Industries Public Limited Company
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