192 clutches and power-stop control – Vortex-flow drive and clutch – With brake
Patent
1991-11-18
1992-08-18
Lorence, Richard
192 clutches and power-stop control
Vortex-flow drive and clutch
With brake
192 125, 192 137, 192 155, 180 651, 318371, B60K 4120
Patent
active
051391210
ABSTRACT:
A braking system for a vehicle having a propelling electric motor and an electromagnetic brake, includes a friction brake; a manually operable brake control lever; an interlocking device for transmitting a displacement of the brake control lever to operate the friction brake; a detecting device for detecting the displacement of the brake control lever and outputting a displacement detection signal; and a control device connected to the electric motor, the electromagnetic brake and the detecting device for controlling the electric motor and the electromagnetic brake and receiving the displacement detection signal from the detecting device. The control device is a board computer operable to reduce rotating rate of the electric motor and actuate the electromagnetic brake to exert a braking force below a maximum braking force during a predetermined period following receipt of the displacement detection signal, and upon lapse of the predetermined period to stop the electric motor and actuate the electromagnetic brake to exert the maximum braking force. When the brake control lever is operated to stop the running vehicle, the running speed is gradually lowered over the predetermined time following an operation of the brake control lever. Consequently, shocks due to stopping of the vehicle are suppressed. The electric motor receives no power supply and the brake is set to a maximum braking state after lapse of the predetermined time. The vehicle is positively stopped by a combined effect of elimination of the propelling drive and the maximum braking force.
REFERENCES:
patent: 2586273 (1952-02-01), Steven
patent: 3621929 (1971-11-01), Oberthur
patent: 4415049 (1983-11-01), Wereb
patent: 4641720 (1987-02-01), Young
patent: 4962969 (1990-10-01), Davis
Kawabata Gonshiro
Kumura Shigenori
Kuramoto Jiro
Kubota Corporation
Lorence Richard
Pitts Andrea
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