192 clutches and power-stop control – Vortex-flow drive and clutch – With brake
Patent
1984-01-31
1985-12-31
Krizmanich, George H.
192 clutches and power-stop control
Vortex-flow drive and clutch
With brake
192 35, 192 9, B60K 4120
Patent
active
045615276
ABSTRACT:
An improved parking brake system for a vehicle capable of switching the operation of the parking brake between an automatic control mode and a manual control mode at the operator's will. The parking brake is applied and released by an electromagnetic device which is controlled by a brake-application command signal and a brake-release command signal produced by a controller. The controller is adapted to be manually switched between a manual brake-application and brake-release control mode and an automatic control mode under the action of a switch. A power supply circuit is provided which has a battery and an ignition power source for supplying power to the electromagnetic device. The power supply circuit is operatively connected with the switch in a manner such that power is supplied to the electromagnetic device from the battery when the switch is manually operated to switch the controller into the manual brake-application control mode, and from the ignition power source when the switch is manually operated to switch the controller into the manual brake-release control mode. With this arrangement, even if the switch is thrown into a position for releasing the parking brake during stoppage of the vehicle on a slope with the parking brake applied, the parking brake is not released but held applied so that accidental starting of the vehicle is positively prevented, whereby safety is improved.
REFERENCES:
patent: 3763975 (1973-10-01), Fontaine
patent: 4262783 (1981-04-01), Scarrott et al.
patent: 4350234 (1982-09-01), Suga et al.
Michihira Osamu
Nakamoto Hiromasa
Natsuaki Yukinobu
Shoji Futoshi
Krizmanich George H.
Mazda Motor Corporation
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