Boots – shoes – and leggings
Patent
1987-03-10
1990-05-15
Lall, Parshotam S.
Boots, shoes, and leggings
3644241, 180248, B60K 1734
Patent
active
049263293
ABSTRACT:
In an arrangement for the control of the power transmission of a four-wheel drive vehicle, a main driving axle is driven directly and an auxiliary driving axle is driven via a continuously controllable longitudinal clutch by an internal combustion engine via a clutch-transmission unit. From a desired performance and the speed of the vehicle, a desired traction force of all the wheels is determined. From this desired traction force, and by a distribution factor that is dependent on operating driving parameters, the control quantity is obtained for the control of the longitudinal clutch. In addition, the longitudinal clutch can be controlled alone or in combination with the control quantity by an additional control quantity obtained by squaring of a speed difference at the longitudinal clutch.
REFERENCES:
patent: 3411601 (1968-11-01), Arkus-Duntov
patent: 4086563 (1978-04-01), Bachman
patent: 4353272 (1982-10-01), Schneider et al.
patent: 4466502 (1984-08-01), Sakai
patent: 4589511 (1986-05-01), Leiber
patent: 4701682 (1987-10-01), Hirotsu et al.
patent: 4715662 (1987-12-01), Van Zanten et al.
patent: 4754835 (1988-07-01), Stelter et al.
Richter Goetz
Schneider Juergen
Stelter Norbert
Dr. Ing. h.c.F. Porsche AG
Lall Parshotam S.
Trans V. N.
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