Fluid-pressure and analogous brake systems – Speed-controlled – Electric control circuit detail
Patent
1996-08-01
1998-05-19
Poon, Peter M.
Fluid-pressure and analogous brake systems
Speed-controlled
Electric control circuit detail
303 20, B60T 800
Patent
active
057527547
ABSTRACT:
A control apparatus for an anti-skid brake system of a motor vehicle can ensure operation of electromagnetic valves for actuating wheel brakes even when a battery voltage is low while ensuring a sufficient braking force for a motor vehicle even when an onboard battery of the motor vehicle is connected with reverse polarity. The apparatus includes a plurality of exciting coils (8a to 8h) provided in association with electromagnetic valves for controlling hydraulic circuits designed for operating front wheel brakes (11, 12) and rear wheel brakes (13, 14), a plurality of transistors (7a to 7h) each connected in series to each of the exciting coils (8a to 8h), a valve control unit (6) for generating on/off signals to the transistors (7a to 7h), a battery (1) for applying a DC voltage to the series circuits each constituted by the exciting coils (8a to 8h) and the transistors (7a to 7h), and diodes (9a to 9h) each disposed in a current path formed between the transistor (7a to 7h) and the exciting coil (8a to 8h) connected in series for blocking a reverse current flowing through the current path.
REFERENCES:
patent: 3650575 (1972-03-01), Okamaoto
patent: 3652132 (1972-03-01), Ando et al.
"Honda CR-V Service Manual, p. 13-B-4-5.".
Amitani Mikio
Naito Yasuo
Mitsubishi Denki & Kabushiki Kaisha
Poon Peter M.
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