US 12,269,553 B2
Control device, suspension system, and saddle-type vehicle
Kentaro Matsubara, Hitachinaka (JP)
Assigned to Hitachi Astemo, Ltd., Hitachinaka (JP); and HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP); and HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Mar. 18, 2022, as Appl. No. 17/698,692.
Application 17/698,692 is a continuation of application No. PCT/JP2020/011691, filed on Mar. 17, 2020.
Prior Publication US 2022/0204111 A1, Jun. 30, 2022
Int. Cl. B62J 45/20 (2020.01); B62J 45/412 (2020.01); B62J 45/415 (2020.01); B62K 25/20 (2006.01)
CPC B62J 45/20 (2020.02) [B62J 45/412 (2020.02); B62K 25/20 (2013.01); B62J 45/415 (2020.02)] 3 Claims
OG exemplary drawing
 
1. A control device comprising:
an arithmetic and logical operation circuit configured to set a target current supplied to a damping force control valve included in a suspension disposed between a vehicle body of a straddle-type vehicle and at least one of a front wheel disposed on a front side of the vehicle body and a rear wheel disposed on a rear side of the vehicle body, wherein
the target current is set by adding a reference current and a correction current,
the reference current is set according to a change velocity of a stroke amount of the suspension,
the correction current is calculated from a reference correction current that is determined by the change velocity of the stroke amount of the suspension,
the reference correction current is set to: 0 when the change velocity of the stroke amount of the suspension is 0, 0 in a first velocity range which is a velocity range in which the change velocity is equal to or larger than a first threshold and smaller than 0, or 0 in a second velocity range which is a velocity range in which the change velocity is larger than 0 and equal to or smaller than a second threshold,
when the reference correction current is set to 0 in the first velocity range, (i) the reference correction current is set to a predetermined first value in a third velocity range which is a velocity range where the change velocity is smaller than a third threshold which is smaller than the first threshold, (ii) the reference correction current is set to a value which changes from 0 to the predetermined first value in accordance with a decrease in the change velocity in a fourth velocity range which is a velocity range in which the change velocity is equal to or larger than the third threshold and smaller than the first threshold, (iii) the reference correction current is set to a predetermined second value in a fifth velocity range which is a velocity range in which the change velocity is larger than a fourth threshold which is larger than the second threshold, and (iv) the reference correction current is set to a value which changes from 0 to the predetermined second value in accordance with an increase in the change velocity in a sixth velocity range which is a velocity range in which the change velocity is larger than the second threshold and equal to or smaller than the fourth threshold,
when the reference correction current is set to 0 in the second velocity range, (i) the reference correction current is set to the predetermined first value in the third velocity range, (ii) the reference correction current is set to a value which changes from 0 to the predetermined first value in accordance with the decrease in the change velocity in the first velocity range and the fourth velocity range, (iii) the reference correction current is set to the predetermined second value in the fifth velocity range, and (iv) the reference correction current is set to a value which changes from 0 to the predetermined second value in accordance with the increase in the change velocity in the sixth velocity range, and
the arithmetic and logical operation circuit is configured to drive the damping force control valve included in the suspension according to the target current such that deterioration in ride quality of the vehicle can be prevented.