Driving force control apparatus and method for 4-wheel driving v

Details Driving force control apparatus and method for 4-wheel driving v Driving force control apparatus and method for 4-wheel driving v

1995-04-05

1997-07-01

Teska, Kevin J.

Boots, shoes, and leggings

180197, B60K 2816

Patent

active

056444885

ABSTRACT:
In a driving force control apparatus for a 4-wheel driving vehicle, a target driving torque is obtained based on a value determined by subtracting a feedback correction torque corresponding to a slip amount from a reference torque corresponding to a vehicle body speed. Slip is suppressed by a throttle control so that the engine output is reduced to the target driving torque. A retard command is output when the slip amount DVS and a slip rate GDVS are greater than predetermined values to control retarding of an ignition timing of the engine, thereby suppressing an abrupt slip. Further, the two greatest values of slip amounts of each of four wheels DVS.sub.1, DVS.sub.2, DVS.sub.3, and DVS.sub.4 are differentiated to determine slip rates GDVS.sub.1 and GDVS.sub.2, and the smaller of the slip rates GDVS.sub.1 and GDVS.sub.2 is used for control of ignition timing retarding. The apparatus causes a 4-wheel driving vehicle equipped with a limited slip differential (LSD) to provide a sufficient effect of the LSD and further suppresses the occurrence of an excessive slip.

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patent: 5283742 (1994-02-01), Wazaki et al.
patent: 5482133 (1996-01-01), Iwata et al.

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