Acitively controlled automotive suspension system with adjustable response characteristics in pitching-suppressive control
First Claim
1. A pitching-suppressive suspension control system for an automotive vehicle comprising:
- a suspension system disposed between a vehicle body and a suspension member which rotatably supports a vehicular wheel, said suspension system having a variable pressure chamber filled with a working fluid of controlled pressure;
a pressure adjusting means, associated with said variable pressure chamber, for adjusting the pressure of said working fluid in said pressure chamber;
a sensor means for monitoring a magnitude of energy of vehicular pitching direction exerted on the vehicle to produce a pitching magnitude indicative signal; and
a control unit receiving said pitching magnitude indicative signal, and producing a pitching-suppressive suspension control signal based on said pitching magnitude indicative signal and a variable pitching-suppressive suspension control coefficient to control said pressure adjusting means for adjusting suspension characteristics to suppress vehicular pitching, said control unit adjusting said pitching-suppressive suspension control coefficient depending on said pitching magnitude indicative signal value for adjusting response characteristics relative to pitching magnitude.
1 Assignment
0 Petitions
Accused Products
Abstract
A suspension control system for an automotive vehicle is designed for effectively suppressing pitching motion and whereby regulating vehicular attitude. The suspension control system monitors pitching moment to be exerted on the vehicle for adjusting response characteristics in pitching-suppressive control depending upon the magnitude of the pitching moment to be exerted. The suspension control system adjusts the response characteristics of the front and rear suspensions independently of each other according to preset pitching-suppressive control coefficients respectively for the front and rear suspensions, which are set depending upon the suspension characteristics and/or suspension geometory of the vehicle, to which the suspension control system is to be applied.
50 Citations
14 Claims
-
1. A pitching-suppressive suspension control system for an automotive vehicle comprising:
-
a suspension system disposed between a vehicle body and a suspension member which rotatably supports a vehicular wheel, said suspension system having a variable pressure chamber filled with a working fluid of controlled pressure; a pressure adjusting means, associated with said variable pressure chamber, for adjusting the pressure of said working fluid in said pressure chamber; a sensor means for monitoring a magnitude of energy of vehicular pitching direction exerted on the vehicle to produce a pitching magnitude indicative signal; and a control unit receiving said pitching magnitude indicative signal, and producing a pitching-suppressive suspension control signal based on said pitching magnitude indicative signal and a variable pitching-suppressive suspension control coefficient to control said pressure adjusting means for adjusting suspension characteristics to suppress vehicular pitching, said control unit adjusting said pitching-suppressive suspension control coefficient depending on said pitching magnitude indicative signal value for adjusting response characteristics relative to pitching magnitude. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A pitching-suppressive suspension control system for an automotive vehicle comprising:
-
at least first-front and second-rear suspension systems, each being disposed between a vehicle body and a suspension member which rotatably supports a vehicular wheel, each of said suspension systems having a variable pressure chamber filled with a working fluid of controlled pressure; a pressure adjusting means, associated with said variable pressure chamber, for adjusting the pressure of said working fluid in said pressure chamber; a sensor means for monitoring a magnitude of energy in vehicular pitching direction exerted on the vehicle to produce a pitching magnitude indicative signal; and a control unit receiving said pitching magnitude indicative signal, and producing a pitching-suppressive suspension control signal based on said pitching magnitude indicative signal and a variable pitching-suppressive suspension control coefficient to control said pressure adjusting means for adjusting suspension characteristics of said first and second suspension systems to suppress vehicular pitching, said control unit adjusting said pitching-suppressive suspension control coefficient for controlling suspension characteristics of said first and second suspension systems depending on said pitching magnitude indicative signal value and for adjusting response characteristics relative to pitching magnitude. - View Dependent Claims (8, 9, 10, 11, 12)
-
-
13. A pitching-suppressive suspension control system for an automotive vehicle comprising:
-
at least first-front and second-rear suspension systems, each being disposed between a vehicle body and a suspension member which rotatably supports a vehicular wheel, each of said suspension systems having a variable pressure chamber filled with a working fluid of controlled pressure; a pressure adjusting means, associated with said variable pressure chamber, for adjusting the pressure of said working fluid in said pressure chamber; a sensor means for monitoring a magnitude of energy of vehicular pitching direction exerted on the vehicle to produce a pitching magnitude indicative signal; and a control unit receiving said pitching magnitude indicative signal, producing a pitching-suppressive suspension control signal based on said pitching magnitude indicative signal and a variable pitching-suppressive suspension control coefficient to control said pressure adjusting means for adjusting suspension characteristics to suppress vehicular pitching, said control unit adjusting said pitching-suppressive suspension control coefficient depending on said pitching magnitude indicative signal value so that a sum of pitching magnitude at said first-front and second-rear suspension systems becomes zero.
-
-
14. A pitching-suppressive suspension control system for an automotive vehicle comprising:
-
at least first-front and second-rear suspension systems, each being disposed between a vehicle body and a suspension member which rotatably supports a vehicular wheel, each of said suspension systems having a variable pressure chamber filled with a working fluid of controlled pressure; a pressure adjusting means, associated with said variable pressure chamber, for adjusting the pressure of said working fluid in said pressure chamber; a sensor means for monitoring a magnitude of energy of vehicular pitching direction exerted on the vehicle to produce a pitching magnitude indicative signal; and a control unit receiving said pitching magnitude indicative signal, producing a pitching-suppressive suspension control signal based on said pitching magnitude indicative signal and a variable pitching-suppressive suspension control gain to control said pressure adjusting means for adjusting suspension characteristics to suppress vehicular pitching, said control unit adjusting said pitching-suppressive suspension control gain depending on said pitching magnitude indicative signal value so that sum of pitching magnitude at said first-front and second-rear suspension systems becomes zero.
-
Specification