System for controlling active suspensions of a vehicle
First Claim
1. A system for controlling active suspensions of a vehicle, having fluid suspensions provided for respective wheels, means for charging and discharging a fluid into and out of the respective fluid suspensions to extend and contract the suspensions independently, a lateral Gsensor provided in the vehicle for detecting lateral acceleration of the vehicle, and a controller responsive to an acceleration signal from the G-sensor for adjusting said charging and discharging means so as to control the amount of the fluid to be charged and discharged to maintain the vehicle attitude in a desired state,said system comprising:
- means for setting a reference lateral acceleration;
changeover means for producing a closing signal when the detected lateral acceleration exceeds the reference lateral acceleration; and
shut-off means responsive to the closing signal for sealing the fluid in the fluid suspensions to change the fluid suspensions from an active state to a passive state.
1 Assignment
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Accused Products
Abstract
In a system for controlling active suspensions of a motor vehicle, having fluid suspensions for the respective wheels, a lateral acceleration sensor, control valves for the respective suspensions, and a controller for adjusting the control valves to charge and discharge a fluid into and out of the fluid suspensions so as to control the vehicle attitude, a shut-off valve is provided between each control valve and each fluid suspension. The shut-off valve is normally open to enable the control of the vehicle attitude in an active state. When the detected lateral acceleration of the vehicle during a turn exceeds a set reference lateral acceleration, an active-passive changeover circuit delivers a shut-off signal to each shut-off valve thereby to close the shut-off valve, whereby all the fluid suspensions are sealed so that the suspension system becomes a passive state. This enables the elimination of the excessive peformance of the active suspension system and makes the suspension units smaller and less costly, reducing energy consumption.
67 Citations
5 Claims
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1. A system for controlling active suspensions of a vehicle, having fluid suspensions provided for respective wheels, means for charging and discharging a fluid into and out of the respective fluid suspensions to extend and contract the suspensions independently, a lateral Gsensor provided in the vehicle for detecting lateral acceleration of the vehicle, and a controller responsive to an acceleration signal from the G-sensor for adjusting said charging and discharging means so as to control the amount of the fluid to be charged and discharged to maintain the vehicle attitude in a desired state,
said system comprising: -
means for setting a reference lateral acceleration; changeover means for producing a closing signal when the detected lateral acceleration exceeds the reference lateral acceleration; and shut-off means responsive to the closing signal for sealing the fluid in the fluid suspensions to change the fluid suspensions from an active state to a passive state. - View Dependent Claims (2, 3, 4, 5)
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Specification