Suspension control device and suspension device

A suspension control device configured to control a damping force of a suspension of a vehicle, comprising:

• a target control amount calculation portion configured to set a target control amount referred to when controlling the damping force of the suspension such that;
• a cycle of a phase of a roll angle of the vehicle and a cycle of a phase of a pitch angle of the vehicle approach a synchronous state,
• a magnitude of a damping force on an extension side is larger than a magnitude of a damping force on a contraction side on a front wheel side of the vehicle, and
• a magnitude of a damping force on a contraction side is equal to or larger than a magnitude of a damping force on an extension side on a rear wheel side of the vehicle, wherein the target control amount calculation portion includes;
• a target pitch angle calculation portion which calculates a target pitch angle with reference to a lateral acceleration of the vehicle,
• a target differential damping gradient calculation portion which calculates a target differential damping gradient with reference to the target pitch angle and an actual pitch angle signal of the vehicle, and
• a front wheel side target differential damping gradient calculation portion configured to calculate a front wheel side target differential damping gradient with reference to a rear wheel side differential damping gradient and the target difference damping gradient, the rear wheel side differential damping gradient being calculated by subtracting an actual damping gradient for an extension side wheel on the rear wheel side from an actual damping gradient for a contraction side wheel on the rear wheel side,
• wherein the actual damping gradient for the contraction side wheel is calculated with reference to a stroke speed of the contraction side wheel and a damping force of the contraction side wheel, and
• wherein the actual damping gradient for the extension side wheel is calculated with reference to a stroke speed of the extension side wheel and a damping force of the extension side wheel.

A suspension device comprising:

• a suspension of a vehicle;
• and
• a control portion configured to control a damping force of the suspension,
• wherein the control portion includes a target control amount calculation portion configured to set a target control amount referred to when controlling the damping force of the suspension such that;
• a cycle of a phase of a roll angle of the vehicle and a cycle of a phase of a pitch angle of the vehicle approach a synchronous state,
• a magnitude of a damping force on an extension side is larger than a magnitude of a damping force on a contraction side on a front wheel side of the vehicle, and
• a magnitude of a damping force on a contraction side is equal to or larger than a magnitude of a damping force on an extension side on a rear wheel side of the vehicle, and
• wherein_the target control amount calculation portion includes;
• a target pitch angle calculation portion configured to calculate a target pitch angle with reference to a roll angle signal of the vehicle,
• a target differential damping gradient calculation portion configured to calculate a target differential damping gradient with reference to the target pitch angle and an actual pitch angle signal of the vehicle, and
• a front wheel side target differential damping gradient calculation portion configured to calculate a front wheel side target differential damping gradient with reference to a rear wheel side differential damping gradient and the target difference damping gradient, the rear wheel side differential damping gradient being calculated by subtracting an actual damping gradient for an extension side wheel on the rear wheel side from an actual damping gradient for a contraction side wheel on the rear wheel side,
• wherein the actual damping gradient for the contraction side wheel is calculated with reference to a stroke speed of the contraction side wheel and a damping force of the contraction side wheel, and
• wherein the actual damping gradient for the extension side wheel is calculated with reference to a stroke speed of the extension side wheel and a damping force of the extension side wheel.

A suspension device comprising:

• a suspension of a vehicle;
• and
• a control portion configured to control a damping force of the suspension,
• wherein the control portion includes a target control amount calculation portion configured to set a target control amount referred to when controlling the damping force of the suspension such that;
• a cycle of a phase of a roll angle of the vehicle and a cycle of a phase of a pitch angle of the vehicle approach a synchronous state,
• a magnitude of a damping force on an extension side is larger than a magnitude of a damping force on a contraction side on a front wheel side of the vehicle, and
• a magnitude of a damping force on a contraction side is equal to or larger than a magnitude of a damping force on an extension side on a rear wheel side of the vehicle, and
• wherein_the target control amount calculation portion includes;
• a target pitch angle calculation portion configured to calculate a target pitch angle with reference to a lateral acceleration of the vehicle,
• a target differential damping gradient calculation portion configured to calculate a target differential damping gradient with reference to the target pitch angle and an actual pitch angle signal of the vehicle, and
• a front wheel side target differential damping gradient calculation portion configured to calculate a front wheel side target differential damping gradient with reference to a rear wheel side differential damping gradient and the target difference damping gradient, the rear wheel side differential damping gradient being calculated by subtracting an actual damping gradient for an extension side wheel on the rear wheel side from an actual damping gradient for a contraction side wheel on the rear wheel side,
• wherein the actual damping gradient for the contraction side wheel is calculated with reference to a stroke speed of the contraction side wheel and a damping force of the contraction side wheel, and
• wherein the actual damping gradient for the extension side wheel is calculated with reference to a stroke speed of the extension side wheel and a damping force of the extension side wheel.