US 9,809,076 B2
Suspension control apparatus for damping oscillation of a vehicle
Ryusuke Hirao, Chiba (JP)
Assigned to HITACHI AUTOMOTIVE SYSTEMS, LTD., Ibaraki (JP)
Filed by HITACHI AUTOMOTIVE SYSTEMS, LTD., Ibaraki (JP)
Filed on Jan. 28, 2016, as Appl. No. 15/9,029.
Application 15/009,029 is a division of application No. 14/037,914, filed on Sep. 26, 2013, granted, now 9,278,599.
Claims priority of application No. 2012-218554 (JP), filed on Sep. 28, 2012.
Prior Publication US 2016/0159189 A1, Jun. 9, 2016
This patent is subject to a terminal disclaimer.
Int. Cl. B60G 17/018 (2006.01); B60G 23/00 (2006.01); B62C 3/00 (2006.01); B62K 25/00 (2006.01); G06F 7/00 (2006.01); G06F 17/00 (2006.01); G06F 19/00 (2011.01); B60G 17/015 (2006.01); B60G 17/016 (2006.01); B60G 17/06 (2006.01); B60G 17/08 (2006.01); F16F 9/34 (2006.01); B60G 21/00 (2006.01)
CPC B60G 17/0152 (2013.01) [B60G 17/016 (2013.01); B60G 17/018 (2013.01); B60G 17/06 (2013.01); B60G 17/08 (2013.01); B60G 21/00 (2013.01); B60G 2202/322 (2013.01); B60G 2204/4232 (2013.01); B60G 2400/10 (2013.01); B60G 2400/102 (2013.01); B60G 2400/206 (2013.01); B60G 2400/25 (2013.01); B60G 2500/10 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A suspension control apparatus comprising:
a damping force adjustable shock absorber disposed between a sprung side and an unsprung side of a vehicle and capable of adjusting a damping force to be generated;
a vertical movement detection device configured to detect a state regarding a vertical movement of the vehicle; and
a controller configured to output a control signal for controlling the damping force to be generated by the damping force adjustable shock absorber based on a detection result of the vertical movement detection device,
wherein the controller is configured to:
calculate a target damping force based on a detection result of the vertical movement detection device,
calculate a corrected damping force which is smaller than an absolute value of the target damping force in a low-speed region in which a relative speed between the sprung side and the unsprung side of the vehicle is a low speed, an absolute value of the corrected damping force being set so that the corrected damping force increases as the relative speed increases and that an inclination of the corrected damping force to the relative speed when the relative speed is in a first range of the low-speed region is smaller than the inclination of the corrected damping force to the relative speed when the relative speed is in a second range of the low speed region in which the relative speed is higher than in the first range, and
output the control signal corresponding to the corrected damping force to the damping force adjustable shock absorber.