Arrangement for the control of the force-transmission of a four-

Details Arrangement for the control of the force-transmission of a four- Arrangement for the control of the force-transmission of a four-

1988-01-13

1988-12-20

Love, John J.

Motor vehicles

Having four wheels driven

74856, 180197, 180249, 192 0076, B60K 1734

Patent

active

047920114

ABSTRACT:
An arrangement for the control of the force-transmission of a four-wheel drive vehicle in which a main driving axle is driven directly by an internal combustion engine by way of a clutch transmission unit and an auxiliary driving axle is driven by the internal combustion engine by way of a continuously controllable longitudinal clutch. A desired traction force of all wheels is determined from a desired power output and from a velocity of the vehicle, from which a control magnitude for the control of the longitudinal clutch is obtained by a distribution factor dependent on operating or driving parameters. The longitudinal clutch can additionally be controlled either alone or advantageously also in combination with this control magnitude by a further control magnitude which is determined by a square of a rotational speed difference at the longitudinal clutch, having a weighting dependent on operating or driving parameters. The driving behavior achieved therewith enables a good steerability of the vehicle with maximum driving safety and traction.

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
Automotive Handbook, Bosch (1984) 256-260 and 330 with corresponding translations from the 2nd Edition (1986)
vol. Berichte (Reports) Nr. 466, p. 106 (1983) and English translation of relevant portion.

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