Fluid-pressure and analogous brake systems – Speed-controlled – Slip ratio
Patent
1994-10-18
1996-02-27
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Slip ratio
303165, 303 20, B60T 832
Patent
active
054943450
ABSTRACT:
In an electric control apparatus for a hydraulic brake control system of a vehicle, a feedback control portion is provided to produce a feedback control pulse signal indicative of a difference between a target slip ratio and an actual slip ratio. A feedforward control portion is provided to successively convert the target slip ratio in relation to a required braking force, a hydraulic braking pressure and an amount of hydraulic braking fluid, in sequence, and to convert the amount of hydraulic braking fluid into a feedforward control pulse signal. A pulse mixing circuit is connected to control portions to mix the control pulse signals for producing a mixed control pulse signal as a distinct control pulse signal. A driving circuit is connected to the pulse mixing circuit to control a hydraulic braking pressure applied to each wheel of the vehicle in accordance with the control pulse signal, regardless of the extent to which a brake pedal of the vehicle is depressed.
REFERENCES:
patent: 4743072 (1988-05-01), Brearley
patent: 5043896 (1991-08-01), Sol
patent: 5176444 (1993-01-01), Kageyama et al.
Hattori Noriaki
Inagaki Shoji
Itoh Takayuki
Mihara Jun
Sugiura Shingo
Aisin Seiki Kabushiki Kaisha
Butler Douglas C.
Toyota Jidosha & Kabushiki Kaisha
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