System for vehicle body roll control with overshoot prevention
First Claim
1. For a vehicle comprising a body and a plurality of wheels upon which said vehicle runs, a roll control system of vehicle height adjustment type for height duration maintenance control comprising:
- a plurality of actuator assemblies equal in number to the number of said vehicle wheels, each actuator assembly corresponding to one of said vehicle wheels and resiliently suspending said one of said vehicle wheels from the vehicle body, each actuator assembly comprising a pressure chamber, and each actuator assembly increasing and decreasing vehicle height at a location in the vicinity of said actuator assembly'"'"'s corresponding vehicle wheel as a result of the supply and discharge of working fluid to and from said pressure chamber;
a plurality of working fluid supplying and discharging means, for supplying working fluid to and discharging working fluid from each said pressure chamber;
means for controlling said plurality of working fluid supplying and discharging means by duty ratio control;
a plurality of vehicle height detection means, for sensing heights of the vehicle body over said vehicle wheels; and
computing and control means for;
calculating deviations of the actual vehicle body heights as detected by said vehicle height detection means from standard vehicle body heights;
controlling said working fluid supplying and discharging means according to a first duty ratio as a function of said deviations of said actual vehicle body heights, so as to maintain said deviations of said actual vehicle body heights within predetermined ranges; and
at the completion of height deviation maintenance control, controlling said working fluid supplying and discharging means in reverse order according to a second duty ratio.
2 Assignments
0 Petitions
Accused Products
Abstract
In this system for vehicle roll control, a plurality of duty radio controlled actuator assemblies are provided, one corresponding to each one of the vehicle wheels, and resiliently suspended from the vehicle body. These actuator assemblies have pressure chambers, and each is adapted to increase or decrease the vehicle height at a location corresponding to its corresponding vehicle wheel as a result of the supplying or discharging of working fluid to or from its pressure chamber. Working fluid supplying and discharging means supply working fluid to and discharge working fluid from the pressure chambers of the actuator assemblies. The system further includes means for sensing the road speed of the vehicle, and means for sensing the steering angle of the vehicle. Vehicle height detection means are also provided for sensing the heights of the vehicle above the vehicle wheels. A means for computing and control calculates the deviations of the actual detected vehicle body heights from standard vehicle body heights; when a certain condition is satisfied, it controls the working fluid supplying and discharging means according to a first duty ratio according to the deviations of the actual vehicle body heights, so as to maintain the deviations of the actual vehicle body heights within predetermined ranges; and then it controls the working fluid supplying and discharging means in the reverse order according to a second duty ratio.
-
Citations
29 Claims
-
1. For a vehicle comprising a body and a plurality of wheels upon which said vehicle runs, a roll control system of vehicle height adjustment type for height duration maintenance control comprising:
-
a plurality of actuator assemblies equal in number to the number of said vehicle wheels, each actuator assembly corresponding to one of said vehicle wheels and resiliently suspending said one of said vehicle wheels from the vehicle body, each actuator assembly comprising a pressure chamber, and each actuator assembly increasing and decreasing vehicle height at a location in the vicinity of said actuator assembly'"'"'s corresponding vehicle wheel as a result of the supply and discharge of working fluid to and from said pressure chamber; a plurality of working fluid supplying and discharging means, for supplying working fluid to and discharging working fluid from each said pressure chamber; means for controlling said plurality of working fluid supplying and discharging means by duty ratio control; a plurality of vehicle height detection means, for sensing heights of the vehicle body over said vehicle wheels; and computing and control means for; calculating deviations of the actual vehicle body heights as detected by said vehicle height detection means from standard vehicle body heights; controlling said working fluid supplying and discharging means according to a first duty ratio as a function of said deviations of said actual vehicle body heights, so as to maintain said deviations of said actual vehicle body heights within predetermined ranges; and at the completion of height deviation maintenance control, controlling said working fluid supplying and discharging means in reverse order according to a second duty ratio. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
-
Specification