Control system for an electromagnetic clutch for a vehicle

Details Control system for an electromagnetic clutch for a vehicle Control system for an electromagnetic clutch for a vehicle

1987-03-27

1989-07-18

Braun, Leslie A.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 0076, 192 215, 192103R, 3644241, B60K 4102, F16D 3702, F16D 2716

Patent

active

048485284

ABSTRACT:
A system for controlling a drag torque of an electromagnetic clutch at idling operation of an engine for a motor vehicle with a continuously variable belt drive transmission. A detector is provided for detecting whether engine speed is higher or lower than a predetermined minimum idling speed. When the engine speed is at a higher engine speed, a standard current is passed in a coil of the clutch. At a lower idling speed, the drag current is gradually reduced until the engine speed increases to the predetermined minimum idling speed.

REFERENCES:
patent: 3402793 (1968-09-01), Scholl
patent: 4494641 (1985-01-01), Sakakiyama
patent: 4605112 (1986-08-01), Takano
patent: 4675817 (1987-06-01), Sakakiyama et al.
patent: 4675818 (1987-06-01), Miyawaki et al.
patent: 4680712 (1987-07-01), Sakakiyama et al.
patent: 4688665 (1987-08-01), Rowen

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