Automatic driving wheel change-over apparatus

Details Automatic driving wheel change-over apparatus Automatic driving wheel change-over apparatus

1982-06-10

1984-11-27

Peters, Jr., Joseph F.

Motor vehicles

Having four wheels driven

180197, 324161, 364426, B60Q 100, B60K 3100

Patent

active

044846533

ABSTRACT:
An automatic driving wheel change-over apparatus designed to automatically effect a change-over between two wheel drive mode and the four wheel drive mode of a vehicle in accordance with the surface conditions of a road. When the difference in speed between the front and rear wheel exceeds a predetermined value during the two wheel drive, a clutch is operated for a predetermined time TM.sub.0, and when the clutch is operated more than four times during a predetermined time TI.sub.0 which is longer than the time TM.sub.0, the clutch is operated continuously for a predetermined time TH.sub.0 which is longer than the time TM.sub.0 thereby holding the vehicle in the four wheel drive mode.

REFERENCES:
patent: 3893535 (1975-07-01), Burckhardt et al.
patent: 4047601 (1977-09-01), Fogelberg et al.
patent: 4086563 (1978-04-01), Bachman
patent: 4312249 (1982-01-01), Hau et al.
patent: 4417641 (1983-11-01), Kageyama

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