Vehicle suspension system

A suspension system for a vehicle, comprising:

• four displacement force generators provided for respective four wheels of the vehicle, each of said four displacement force generators having an electromagnetic motor and configured to generate, based on a motor force generated by said electromagnetic motor, a displacement force forcing sprung and unsprung portions of the vehicle to be displaced toward or away from each other;
• and
• a controller configured to control the displacement force generated by each of said four displacement force generators, by controlling operation of said electromagnetic motor of said each of said four displacement force generators,
• wherein said controller includes a target-value determining portion configured to determine a target value of a displacement-force-relating amount of each of said four displacement force generators, which relates to the displacement force that is to be generated by said each of said four displacement force generators, and a target-value reducing portion configured to reduce the target value of the displacement-force-relating amount of a subjected device as one of said four displacement force generators, in accordance with a certain rule,
• wherein said target-value reducing portion is configured to reduce the target value of the displacement-force-relating amount of each of at least one of non-subjected devices as the other three of said four displacement force generators, in accordance with said certain rule, when reducing the target value of the displacement-force-relating amount of said subjected device in accordance with said certain rule, and
• wherein said certain rule is a rule for reducing a subjected target value as the target value of the displacement-force-relating amount of said subjected device by multiplying the subjected target value by a specific ratio, and reducing a non-subjected target value as the target value of the displacement-force-relating amount of each of said at least one of said non-subjected devices by multiplying the non-subjected target value by said specific ratio.

A suspension system for a vehicle, comprising:

• four displacement force generators provided for respective four wheels of the vehicle, each of said four displacement force generators having an electromagnetic motor and configured to generate, based on a motor force generated by said electromagnetic motor, a displacement force forcing sprung and unsprung portions of the vehicle to be displaced toward or away from each other;
• and
• a controller configured to control the displacement force generated by each of said four displacement force generators, by controlling operation of said electromagnetic motor of said each of said four displacement force generators,
• wherein said controller includes a target-value determining portion configured to determine a target value of a displacement-force-relating amount of each of said four displacement force generators, which relates to the displacement force that is to be generated by said each of said four displacement force generators, and a target-value reducing portion configured to reduce the target value of the displacement-force-relating amount of a subjected device as one of said four displacement force generators, in accordance with a certain rule,
• wherein said target-value reducing portion is configured to reduce the target value of the displacement-force-relating amount of each of at least one of non-subjected devices as the other three of said four displacement force generators, in accordance with said certain rule, when reducing the target value of the displacement-force-relating amount of said subjected device in accordance with said certain rule,
• wherein said controller is configured to execute a plurality of undesirable-behavior suppression controls for suppressing respective undesirable behaviors of a body of the vehicle that are different from each other,
• wherein said target-value determining portion is configured to determine a plurality of target value components of the target value that are to be directed to the respective undesirable behaviors in the respective undesirable-behavior suppression controls, and to determine the target value as a sum of the plurality of target value components, and
• wherein said certain rule is a rule for reducing each of the plurality of target value components of a subjected target value as the target value of the displacement-force-relating amount of said subjected device by multiplying said each of the plurality of target value components of the subjected target value by a specific ratio, and reducing each of the plurality of target value components of a non-subjected target value as the target value of the displacement-force-relating amount of each of said at least one of said non-subjected devices by multiplying said each of the plurality of target value components of the non-subjected target value by said specific ratio.