System for controlling stall speed for an electromagnetic clutch

Details System for controlling stall speed for an electromagnetic clutch System for controlling stall speed for an electromagnetic clutch

1983-01-27

1985-11-05

Bonck, Rodney H.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 0076, 192 0092, 192 356, 192 215, F16D 3702, B60K 4100, B60K 4102

Patent

active

045508160

ABSTRACT:
A system for controlling stall speed for an electromagnetic clutch having a magnetizing coil for engaging a crankshaft of an internal combustion engine with an input shaft of a transmission of a vehicle. A transistor switching circuit for allowing clutch current to flow through the magnetizing coil, and an electric circuit for producing pulses dependent on ignition pulses of the engine are provided for intermittently turning on the transistor for energizing the coil. A circuit including a time constant circuit and a switching transistor is provided for decreasing duty ratio of the pulses and for decreasing the clutch current. Switches are provided for detecting a heavy load condition at starting of the vehicle and for producing an output signal. The output signal is latched by a flip-flop and applied to the switching transistor thereby to decrease the duty ratio of the pulses for decreasing the clutch current with respect to the engine speed.

REFERENCES:
patent: 3073422 (1963-01-01), Baumann
patent: 3126989 (1964-03-01), Baumann
patent: 3163272 (1964-12-01), Baumann
patent: 3163273 (1964-12-01), Maier
patent: 3250341 (1966-05-01), Takahashi
patent: 3628642 (1971-12-01), Ravenal
patent: 4027554 (1977-06-01), Ito et al.
patent: 4401199 (1983-08-01), Takano et al.

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