Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors
Patent
1983-07-21
1985-05-07
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Multiple fluid-receiving devices
Multiple motors
303 92, 303116, 303119, 303111, B60T 802
Patent
active
045154120
ABSTRACT:
A dual type antilock braking device for four-wheeled vehicles wherein braking wheel cylinders for front and rear wheels are connected with each other in the form of X to provide first and second braking hydraulic systems. The device includes a pair of cylinders each of which has a central antilock controlling hydraulic chamber defined between first pistons mounted at the inner ends of rods capable of slidably penetrating axially spaced partition walls, primary braking hydraulic chambers defined between the first pistons and the partition walls, and secondary braking hydraulic chambers defined between the partition walls and second pistons mounted at the outer ends of the rods. Each of the rods is formed with communicating grooves through which the primary braking hydraulic chamber is able to be communicated with the secondary braking hydraulic chamber when the rods moves inward by a distance exceeding a given amount. The primary braking hydraulic chambers of each cylinder are separately connected to a hydraulic source through the first and second braking hydraulic systems. The secondary braking hydraulic chambers are connected to wheel cylinders for the front and rear wheels in both braking hydraulic chambers, respectively. With this arrangement, if either one of the wheel cylinders for front and rear wheels in one braking hydraulic system be failed, the other wheel cylinder in the same system is also made inoperative, so that normal braking action can be effected using the remaining braking hydraulic system which continues to operate normally.
REFERENCES:
patent: 3738712 (1973-06-01), Flory
patent: 3866983 (1975-02-01), Kondo
patent: 4345796 (1982-08-01), Reinecke
patent: 4418966 (1983-12-01), Hattwig
patent: 4460220 (1984-07-01), Petersen
Butler Douglas C.
Honda Giken Kogyo Kabushiki Kaisha
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