Motor vehicles – With means for detecting wheel slip during vehicle...
Patent
1989-03-30
1990-10-09
Bertsch, Richard A.
Motor vehicles
With means for detecting wheel slip during vehicle...
180247, 303100, 36442602, B60K 17348
Patent
active
049614762
ABSTRACT:
The arrangement controls a friction element for limiting a rotational speed compensation between the axles of a two-axle or all-wheel-driven vehicle as a function of the difference of the medium wheel speeds of both axles (longitudinal speed difference). This longitudinal speed difference is compared with two driving-speed-dependent tolerance bands, the first tolerance band being determining for positive and the second tolerance band being determining for negative longitudinal speed differences. If the values of the longitudinal speed differences are above the first or below the second tolerance band, the limiting is increased; if the values are within the tolerance bands, the instantaneous limiting is maintained; and if the values are between the tolerance bands, the limiting is reduced. This arrangement may also be expanded to include an adaptation device of the limit criteria with respect to different tread radii of the wheels and a cornering correction device.
REFERENCES:
patent: 4032197 (1977-06-01), Kohler
patent: 4844557 (1989-07-01), Giers
Brakes and ABs on Four-Wheel Drive Vehicles, SAE, page 15, 2/29/88.
Appt Ulrich
Geiger Rolf
Lawitzki Stephan
Stelter Norbert
Witte Lothar
Bertsch Richard A.
Culbreth Eric
Dr. Ing. h.c.F. Porsche AG
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