Toyota Jidosha Kabushiki Kaisha

Nippondenso Co., Ltd.

Kaoru Oohashi

Kazuyuki Natsume

Yoshihiro Sasage

Naoto Ooka

Hideaki Kato

An improved vehicle height control system comprises vehicle height adjusters responsive to a control signal for adjusting a longitudinal inclination of the vehicle body, an inclination signal generator for generating an inclination signal indicative of an inclination of a road surface on which the vehicle is running, and a control unit for supplying to the vehicle height adjusters the control signal for increasing the height of the rear part of the vehicle body relative to that of the front part thereof when the road surface is ascendant.

Vehicle height control system

A vehicle height control system includes a plurality of vehicle height adjusters actuated by a pneumatic actuating system and controlled respectively by control signals from a control unit. The control unit calculates, for each of the vehicle height adjusters, a target difference between a target adjustment position and an actual position detected by a vehicle height sensor associated with the adjuster. The control unit compares the target differences for respective vehicle height adjusters, and the adjuster having the target difference which is the largest in magnitude is first actuated to perform its adjusting operation, thereby preventing unbalanced differences in the vehicle height.

A vehicle height control system includes a plurality of vehicle height adjusters actuated by a hydropneumatic actuating system and controlled by control signals from a control unit. The control unit calculates, for each of the vehicle height adjusters, a target difference between a target adjustment position set by a setting device and an actual position detected by a vehicle height sensor associated with the adjuster, and the control unit generates the control signals in accordance with the respective target differences. The control unit further selects a maximum target difference, and calculates deviations of the target differences from the maximum target difference. When any of the deviations exceeds a predetermined value, the adjustment operation of the vehicle height adjuster associated with this deviation is temporarily stopped thereby correcting the nonuniformity of the adjustments in the vehicle height adjusters.

A vehicle height control system includes a plurality of vehicle height adjusters actuated by a hydropneumatic actuating system and controlled respectively by control signals from a control unit. The control unit calculates, for each of the vehicle height adjusters, a target difference between a target adjustment position and an actual position detected by a vehicle height sensor associated with the adjuster. A maximum target difference is selected from the target differences respectively for the adjusters, and the selected maximum target difference is divided by a predetermined adjusting unit to determine a number of steps for adjustment of the target difference a little amount at a time. Then, tentative- or pseudo-target adjustment positions ranging between the actual position and the target adjustment position are obtained for each adjuster, and the adjustment control of each adjuster is carried out to achieve the pseudo target adjustment positions step by step.

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Okazaki, Japan

Kaoru Oohashi