Actively controlled automotive suspension system with adjustable rolling stability

Claim 2

An actively controlled suspension system for an automotive vehicle comprising: pressure means, incorporated in each of suspension systems in an automtoive vehicle and disposed betwen a vehicle body and a suspension member in associated suspension system, for supporting said vehicle body on said suspension member, each said pressure means including a variable pressure chamber variable of a pressure of a working fluid therein according to relative bounding and rebounding motion of vehicle body and siad suspension member; a sensor means for monitoring acceleration kinematic acceleration exerted on the vehicle body to cause change of attitude thereof, said sensor means producing an acceleration indicative sensor signal indicative thereof; and a controller receiving said sensor signal to detect vehicular attitude change on based thereon, and deriving a control signal based on thre detected attitude change of the vehicle body for adjusting the fluid pressure in each of said variable pressure chamber for suppressing attitude change of the vehicle body in rolling and pitching direction.

Claim 3

An actively controller suspension system as set forth in claim 1, wherein said sensor means monitoring a lateral acceleration to be exerted on the vehicle body to produce a lateral acceleration indicative signal and said controller is responsive to said lateral acceleration indicative signal to perform rolling suppressive active suspension control for suppressing rolling motion on the vehicle body by adjusting fluid pressure in respective variable pressure chambers.

Claim 4

An actively controlled suspension system as set forth in claim 2, wherein magnitudes of increasing of the fluid pressure in one of said first and second variable pressure chamber substantially corresponds with the magnitude of decreasing of the fluid pressure in the other of said first and second variable pressure chamber.

Claim 5

An actively controller suspension system as set forth in claim 3, wherein said sensor means comprises a vehicle speed sensor for producing a vehicle speed indicative signal and a steering angle sensor steering angle sensor for producing a steering angle signal, and an arithmetic means for deriving a projected lateral acceleration based on said vehicle speed indicative signal value and said steering angle indicative signal value.

Claim 6

An actively controlled suspension system as set forth in claim 1, wherein said sensor means monitoring a pitching acceleration to be exerted on the vehicle body to produce a pitching acceleration indicative signal and said controller is responsive to said pitching acceleration indicative signal to perform pitching suppressive active suspension control for suppressing pitching motion on the vehicle body by adjusting fluid pressure in respective variable pressure chambers.

Claim 7

An actively controlled suspension system for an automotive vehicle comprising: a first fluid presusre means provided at front portion of a first lateral side of the vehicle body and interposed between a vehicle body and a suspension member rotatably supporting a road wheel, said fluid pressure means having a first variable pressure chamber; a second fluid presusre means provided at the front portion of a second lasteral side of the vehicle body and interposed between a vehicle body and a suspension member rotatably supporting a road wheel, said fluid pressure means having a first variable pressure chamber; a third fluid presusre means provided at rear portion of a first lateral side of the vehicle body and interposed between a vehicle body and a suspension member rotatably supporting a road wheel, said fluid pressure means having a first variable pressure chamber; a fourth fluid presusre means provided at the rear portion of a second lasteral side of the vehicle body and interposed between a vehicle body and a suspension member rotatably supporting a road wheel, said fluid pressure means having a first variable pressure chamber; a sensor means for monitoring acceleration kinematic acceleration exerted on the vehicle body to cause change of attitude thereof, said sensor means producing an acceleration indicative sensor signal indicative thereof; a controller receiving said sensor signal to detect vehicular attitude change on based thereon, and deriving a control signal based on the detected attitude change of the vehicle body for adjusting the fluid pressure in each of said variable pressure chamber in said first, second, third and fourth pressure means for-suppressing attitude change of the vehicle body in rolling and pitching direction.

Claim 8

An actively controlled suspension system for an automotive vehicle comprising: a first fluid presusre means provided at front portion of a first lateral side of the vehicle body and interposed between a vehicle body and a suspension member rotatably supporting a road wheel, said fluid pressure means having a first variable pressure chamber; a second fluid presusre means provided at the front portion of a second lasteral side of the vehicle body and interposed between a vehicle body and a suspension member rotatably supporting a road wheel, said fluid pressure means having a first variable pressure chamber; a third fluid presusre means provided at rear portion of a first lateral side of the vehicle body and interposed between a vehicle body and a suspension member rotatably supporting a road wheel, said fluid pressure means having a first variable pressure chamber; a fourth fluid presusre means provided at the rear portion of a second lasteral side of the vehicle body and interposed between a vehicle body and a suspension member rotatably supporting a road wheel, said fluid pressure means having a first variable pressure chamber; a sensor means for monitoring acceleration kinematic acceleration exerted on the vehicle body to cause change of attitude thereof, said sensor means producing an acceleration indicative sensor signal indicative thereof; a controller receiving said sensor signal to detect vehicular attitude change on based thereon, and deriving a control signal based on the detected attitude change of the vehicle body for adjusting the fluid pressure in each of said variable pressure chamber in said first, second, third and fourth pressure means for-suppressing attitude change of the vehicle body in rolling and pitching direction.

Claim 9

An actively controlled suspension system as set forth in claim 6, wherein said; sensor means monitoring a lateral acceleration to .be exerted on the vehicle body to produce a lateral acceleration indicative signal and said controller is responsive to said lateral acceleration indicative signal to perform rolling suppressive active suspension control for suppressing rolling motion on the vehicle body by adjusting fluid pressure in respective variable pressure chambers.

Claim 10

An actively controller suspension system as set forth in claim 7, wherein said sensor means comprises a vehicle speed sensor for producing a vehicle speed indicative signal and a steering angle sensor steering angle sensor for producing 'a steering angle signal, and an arithmetic means for deriving a projected lateral acceleration based on said vehicle speed indicative signal value and said steering angle indicative signal value.

Claim 11

An actively controlled suspension system as set forth in claim 6, wherein said sensor means monitoring a pitching acceleration to be exerted on the vehicle body to produce a pitching acceleration indicative signal and said controller is responsive to said pitching acceleration indicative signal to perform pitching suppressive active suspension control for suppressing pitching motion on the vehicle body by adjusting fluid pressure in respective variable pressure chambers.