Control system for an electromagnetic clutch for automobiles

Details Control system for an electromagnetic clutch for automobiles Control system for an electromagnetic clutch for automobiles

1982-11-26

1985-05-07

Krizmanich, George H.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 0096, 192 215, B60K 4102, F16D 2700

Patent

active

045152578

ABSTRACT:
A control system for a belt-drive continuously variable transmission. The transmission is connected to a crankshaft of an engine through an electromagnetic powder clutch. The control system has a vacuum switch which is closed by rapid release of an accelerator pedal for producing engine braking effect, a gate circuit including a NOR gate, and an astable multivibrator. The NOR gate is opened for a short time decided by a time constant circuit, and the multivibrator supplies pulses through the NOR gate to a switching transistor provided in a circuit of the electromagnetic clutch for periodically opening the transistor during the opening of the NOR gate. Thus, the electromagnetic clutch is intermittently engaged for providing partial engagement of the clutch for the short time.

REFERENCES:
patent: 3903759 (1975-09-01), Hashimoto
patent: 4072220 (1978-02-01), Hamada
patent: 4393964 (1983-07-01), Kemper
patent: 4425992 (1984-01-01), Makita
patent: 4449620 (1984-05-01), Sakakiyama

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