Anti-rolling control for actively controlled automotive suspension system with enhanced rolling detecting ability

Claim 2

An actively controlled suspension system as set forth in claim 1, wherein said hydraulic cylinder and said pressure control valve means is provided for each of suspension systems respectively associated with said front and rear wheels, and said controller means detects load distribution between said front and rear wheels on the basis of said pressure of said pressure medium of working chambers of respective hydraulic cylinders and determines a longitudinal position to monitor said acceleration, said controller means derives said acceleration on the basis of said sensor signal and known distance of said oriented position relative to said gravity center.

Claim 3

An actively controlled suspension system as set forth in Claim 2, wherein said hydraulic cylinder and said pressure control valve means is provided for each of suspension systems respectively associated with said front and rear wheels, and said controller means derives said suspension control signal for said pressure control valve means associated with said suspension systems of said front wheels and said rear wheels on the basis of said sensor signal.

Claim 4

An actively controlled suspension system as set forth in claim 3, wherein said acceleration sensor comprises a lateral acceleration sensor.

Claim 5

An actively controlled suspension system as set forth in claim 4, wherein the frontward offset magnitude of said acceleration sensor is derived so as to compensate phase delay of control system.

Claim 6

An actively controlled suspension system as set forth in claim 5, wherein said frontward offset magnitude of said acceleration sensor relative to the gravity center is derived so that the acceleration sensor is additionally subject to yawing force in a magnitude compensating said phase delay.

Claim 7

An actively controlled suspension system for an automotive vehicle, comprising: a first cylinder oriented one lateral side of a vehicle body and disposed between a vehicle body an a suspension member which rotatably support a road wheel, said cylinder defining a variable pressure working chamber filled with a pressure medium for generating a damping force resisting against relative displacement between said vehicle body and said suspension member, said pressure of said pressure medium being variable between a predetermined maximum value and a predetermined minimum value across a predetermined neutral value; a second cylinder oriented the other lateral side of said vehicle body and disposed between a vehicle body and a suspension member which rotatably support a road wheel, said cylinder defining a variable pressure working chamber filled with a pressure medium for generating a damping force resisting against relative displacement between said vehicle body and said suspension member, said pressure of said pressure medium being variable between a predetermined maximum value and a predetermined minimum value across a predetermined neutral value; a pressure source circuit means connected to said working chamber for supplying pressure medium and including a pressure source feeding pressurized pressure medium through said circuit; a pressure control valve disposed between said pressure source and said working chamber of each of said first and second cylinder, and variable of valve position between a first mode for increasing pressure of said pressure medium within said working chamber, a second mode for decreasing pressure in said pressure within said working source, and a third mode for maintaining said pressure in said pressure medium constant; an acceleration sensor, oriented on the vehicular body at a position frontwardly offset from a gravity center of the vehicular body, for monitoring an acceleration exerted on the vehicle body, to cause vehicular attitude change and producing a sensor signal indicative thereof; a controller means for receiving said sensor signals for deriving a first and second suspension control signals for operating said pressure control valves of respective first and second cylinders at one of said first, second and third mode positions for regulating vehicular attitude on the basis of said sensor signal, said first and second suspension control signals having equal magnitude and opposite polarities with respect to each other.

Claim 8

An actively controlled suspension system as set forth in claim 7, wherein said hydraulic cylinder and said pressure control valve means is provided for each of suspension systems respectively associated with said front and rear wheels, and said controller means detects load distribution between said front and rear wheels on the basis of said pressure of said pressure medium of working chambers of respective hydraulic cylinders and determines a longitudinal position to monitor said acceleration, said controller means derives said acceleration on the basis of said sensor signal and known distance of said oriented position relative to said gravity center.

Claim 9

An actively controlled suspension system as set forth in claim 8, wherein said hydraulic cylinder and said pressure control valve means is provided for each of suspension systems respectively associated with said front and rear wheels, and said controller means derives said suspension control signal for said pressure control valve means associated with said suspension systems of said front wheels and said rear wheels on the basis of said sensor signal.

Claim 10

An activley controlled suspension system as set forth in claim 9, wherein said acceleration sensor comprises a lateral acceleration sensor.

Claim 11

An actively controlled suspension system as set forth in claim 10, wherein the frontward offset magnitude of said acceleration sensor is derived so as to compensate phase delay of control system.

Claim 12

An actively controlled suspension system as set forth in claim 11, wherein said frontward offset magnitude of said acceleration sensor relative to the gravity center is derived so that the acceleration sensor is additionally subject yawing force in a magnitude compensating said phase delay.