Vehicle power distribution and control system

Details Vehicle power distribution and control system Vehicle power distribution and control system

1993-01-22

1994-04-12

Focarino, Margaret A.

Motor vehicles

Having four wheels driven

With differential means for driving two wheel sets at...

3644241, B60K 17344

Patent

active

053017692

ABSTRACT:
A vehicle power distribution and control system controls and distributes the power supplied to the wheels of a motor vehicle with at least two driven axles. One of the axles includes an axle differential gear. The control system includes a steering angle sensor, rotational speed sensors to monitor the rotational speeds of the wheels of at least one axle, and an electronic control unit. A differential lock for the axle differential gear is controlled by the control unit to equalize sliding effects that can occur between the wheels of one axle. The control unit calculates a theoretical rotational speed difference ratio from the value of the sensed steering angle for conditions of rolling without any slip and an actual rotational speed difference ratio from the sensed rotational speed values. The control unit compares the two rotational speed difference ratios with each other in predetermined time intervals and transmits control signals to the axle differential locks to increase the degree of locking of the axle differential lock when the actual rotational speed difference ratio is greater than the theoretical rotational speed difference ratio, and to reduce the degree of locking when the actual rotational speed difference ratio is smaller than the theoretical rotational speed difference ratio.

REFERENCES:
patent: 4669559 (1987-06-01), Fukui
patent: 4776424 (1988-10-01), Naito
patent: 4825368 (1989-04-01), Itoh et al.
patent: 4895217 (1990-01-01), Huckler et al.
patent: 5070961 (1991-12-01), Tezuka
patent: 5099944 (1992-03-01), Kageyama et al.

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