Actively controlled automotive suspension system with acceleration and angular velocity dependent anti-pitching and/or anti-rolling feature
First Claim
1. A control system for an automotive suspension system for controlling vehicular attitude comprising:
- said 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 first sensor means sensing acceleration in vehicular attitude change to produce a first sensor means signal indicative of said attitude change acceleration;
a second sensor means sensing an attitude change creative component which is contained in said first sensor means signal, to produce a second sensor means signal indicative thereof;
a control unit receiving said first and second sensor means signals, deriving a suspension control second value on the basis of said first sensor means signal and modifying said suspension control signal value on the basis of said second sensor means signal, said control unit outputting a control signal based at least on said modified suspension control signal value to control said pressure adjusting means for adjusting suspension characteristics to suppress said vehicular attitude change.
1 Assignment
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Accused Products
Abstract
An actively controlled automotive suspension system employs a factor representative of self-induced attitude change creative factor as a correction factor in attitude regulating suspension control. Suspension characteristics is controlled on the basis of rolling and/or pitching energy representing parameter. The correction factor representative of self-induced attitude change is derived on the basis of vehicular attitude change velocity for canceling the self-induced rolling and/or pitching. By canceling the self-induced rolling and/or pitching creative component from the rolling and/or pitching acceleration factor, higher rolling and/or pitching response characteristics can be provided so as to satisfactory high driving stability and riding comfort.
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Citations
23 Claims
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1. A control system for an automotive suspension system for controlling vehicular attitude comprising:
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said 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 first sensor means sensing acceleration in vehicular attitude change to produce a first sensor means signal indicative of said attitude change acceleration; a second sensor means sensing an attitude change creative component which is contained in said first sensor means signal, to produce a second sensor means signal indicative thereof; a control unit receiving said first and second sensor means signals, deriving a suspension control second value on the basis of said first sensor means signal and modifying said suspension control signal value on the basis of said second sensor means signal, said control unit outputting a control signal based at least on said modified suspension control signal value to control said pressure adjusting means for adjusting suspension characteristics to suppress said vehicular attitude change. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A control system for an automotive suspension system for controlling vehicular attitude comprising:
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said 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 first sensor means sensing acceleration in vehicular rolling to produce a first sensor means signal indicative of said rolling acceleration; a second sensor means sensing a rolling creative component which is contained in said first sensor means signal, to produce a second sensor means signal indicative thereof; a control unit receiving said first and second sensor means signals, deriving a suspension control signal value on the basis of said first sensor means signal and modifying said suspension control signal value on the basis of said second sensor means signal, said control unit outputting a control signal based at least on said modified suspension control signal value to control said pressure adjusting means for adjusting suspension characteristics to suppress said vehicular rolling. - View Dependent Claims (14, 15, 16, 17)
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18. A control system for an automotive suspension system for controlling vehicular attitude comprising:
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said suspension system disposed between a vehicular 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 first sensor means sensing acceleration in vehicular pitching to produce a first sensor means signal indicative of said pitching acceleration; a second sensor means sensing a pitching creative component which is contained in said first sensor means signal, to produce a second sensor means signal indicative thereof; a control unit receiving said first and second sensor means signals, deriving a suspension control signal value on the basis of said first sensor means signal and modifying said suspension control signal value on the basis of said second sensor means signal, said control unit outputting a control signal based at least on said modified suspension control signal value to control said pressure adjusting means for adjusting suspension characteristics to suppress said vehicular pitching. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification