Four-wheel drive system

Details Four-wheel drive system Four-wheel drive system

1999-05-24

2000-10-17

Wright, Dirk

Interrelated power delivery controls, including engine control

Transmission control

Plural outputs

B60K 4104

Patent

active

061323322

ABSTRACT:
A four-wheel drive system according to the invention can shorten a delay in response of an electromagnetic clutch and permits shockless transition to 4WD. In a rotation transmission device having a two-way clutch including rollers mounted between an inner member and an outer ring for selective transmission and non-transmission of rotation between the inner member and the outer ring, an electromagnetic clutch for controlling the locking and freeing of the two-way clutch, and a current control mechanism for controlling the locking and freeing of the two-way clutch, a current supplied to the current control mechanism is controlled based on an input signal from a sensor for detecting the load on the engine to shorten a delay in response until the two-way clutch locks after the supply of a current to the electromagnetic coil has begun and to prevent shocks during transition to 4WD.

REFERENCES:
patent: 4989686 (1991-02-01), Miller et al.
patent: 5522777 (1996-06-01), Baxter et al.
patent: 5839084 (1998-11-01), Takasaki et al.
patent: 5971123 (1999-10-01), Ochab et al.

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