Damping force control apparatus for vehicle
First Claim
1. A damping force control apparatus for a vehicle in which four wheels are suspended by respective suspension systems including respective shock absorbers, and damping forces of the shock absorbers are controlled individually in accordance with turning conditions of the vehicle, the damping force control apparatus comprising:
- wheel stroke detection means for detecting respective strokes of the four wheels in relation to a vehicle body;
lateral acceleration detection means for detecting a lateral acceleration acting on the vehicle during turning;
plurality of sprung acceleration detection means for detecting respective sprung accelerations at positions that correspond to the four wheels;
target-posture setting means for setting a target posture of the vehicle body during turning in accordance with the lateral acceleration detected by the lateral acceleration detection means;
actual posture determining means for determining an actual posture of the vehicle body during turning in accordance with the sprung accelerations detected by the plurality of sprung acceleration detection means;
correction posture determining means for determining a correction posture by comparing the target posture and the actual posture;
target-damping-force setting means for setting target damping forces which the shock absorbers are required to generate so as to render the actual posture of the vehicle body determined by the actual posture determining means coincident with the target posture set by the target-posture setting means, wherein the target damping forces are set in accordance with the correction posture and a stroke speed that is based on the strokes; and
damping-force control means for controlling the damping forces of the shock absorbers in accordance with the target damping forces set by the target-damping-force setting means.
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Accused Products
Abstract
A damping force control apparatus for a vehicle includes adjustable-damping-force shock absorbers. When the vehicle turns, an electronic controller calculates an actual roll angle of the vehicle body in accordance with sprung accelerations detected by sprung acceleration sensors. The electronic controller also calculates a target roll angle of the vehicle body in accordance with a lateral acceleration detected by a lateral acceleration sensor. The target roll angle is set such that it increases with the lateral acceleration acting on the vehicle during turning and is uniquely determined by the lateral acceleration. The electronic controller sets target damping forces of the shock absorbers such that the actual roll angle coincides with the target roll angle, and controls the damping forces of the shock absorbers in accordance with the set target damping forces.
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Citations
14 Claims
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1. A damping force control apparatus for a vehicle in which four wheels are suspended by respective suspension systems including respective shock absorbers, and damping forces of the shock absorbers are controlled individually in accordance with turning conditions of the vehicle, the damping force control apparatus comprising:
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wheel stroke detection means for detecting respective strokes of the four wheels in relation to a vehicle body; lateral acceleration detection means for detecting a lateral acceleration acting on the vehicle during turning; plurality of sprung acceleration detection means for detecting respective sprung accelerations at positions that correspond to the four wheels; target-posture setting means for setting a target posture of the vehicle body during turning in accordance with the lateral acceleration detected by the lateral acceleration detection means; actual posture determining means for determining an actual posture of the vehicle body during turning in accordance with the sprung accelerations detected by the plurality of sprung acceleration detection means; correction posture determining means for determining a correction posture by comparing the target posture and the actual posture; target-damping-force setting means for setting target damping forces which the shock absorbers are required to generate so as to render the actual posture of the vehicle body determined by the actual posture determining means coincident with the target posture set by the target-posture setting means, wherein the target damping forces are set in accordance with the correction posture and a stroke speed that is based on the strokes; and damping-force control means for controlling the damping forces of the shock absorbers in accordance with the target damping forces set by the target-damping-force setting means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A damping force control apparatus for a vehicle in which four wheels are suspended by respective suspension systems including respective shock absorbers, and damping forces of the shock absorbers are controlled individually in accordance with turning conditions of the vehicle, the damping force control apparatus comprising:
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vehicle height sensors that detect strokes of the four wheels in relation to a vehicle body; a lateral acceleration sensor that detects a lateral acceleration acting on the vehicle during turning; plurality of sprung acceleration sensors that respectively detect sprung accelerations at positions that correspond to the four wheels; and an electronic controller, wherein the electronic controller is configured to set a target posture of the vehicle body during turning in accordance with the lateral acceleration detected by the lateral acceleration sensor, the electronic controller is configured to determine an actual posture of the vehicle body during turning in accordance with the sprung accelerations detected by the plurality of sprung acceleration sensors, the electronic controller is configured to determine a correction posture by comparing the target posture and the actual posture, the electronic controller is configured to set a target damping forces which the shock absorbers are required to generate so as to render the actual posture of the vehicle body coincident with the target posture, the target damping forces are set in accordance with the correction posture and a stroke speed that is based on the strokes, and the electronic controller is configured to control the damping forces of the shock absorbers in accordance with the target damping forces.
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13. A damping force control apparatus for a vehicle in which four wheels are suspended by respective suspension systems including respective shook absorbers, and damping forces of the shock absorbers are controlled individually in accordance with turning conditions of the vehicle, the damping force control apparatus comprising:
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roll angle detection means for detecting an actual roll angle of the vehicle body about a longitudinal axis of the vehicle; pitch angle detection means for detecting an actual pitch angle of the vehicle body about a lateral axis of the vehicle; lateral acceleration detection means for detecting a lateral acceleration acting on the vehicle during turning; target roll angle setting means for setting a target roll angle of the vehicle body about the longitudinal axis of the vehicle in accordance with the lateral acceleration detected by the lateral acceleration detection means, the target roll angle increasing with the detected lateral acceleration; target pitch angle setting means for setting a target pitch angle of the vehicle body about the lateral axis of the vehicle in accordance with the target roll angle set by the target roll angle setting means, the target pitch angle increasing with the set target roll angle; target-damping-force setting means for setting target damping forces which the shock absorbers are required to generate so as to render the actual roll angle detected by the roll angle detection means and the actual pitch angle detected by the pitch angle detection means coincident with the target roll angle set by the target roll angle setting means and the target pitch angle set by the target pitch angle setting means respectively; and damping-force control means for controlling the damping forces of the shock absorbers in accordance with the target damping forces set by the target-damping-force setting means. - View Dependent Claims (14)
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Specification