Clutch controller, straddle-type vehicle, and method for controlling clutch
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorKengo Minami
Life of this patent
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Abstract
Appropriate torque is transmitted via a clutch that does not spend too much time on its engaging operation. A clutch controller controls a degree of engagement of the clutch by actuating a clutch actuator based on a difference between actual transmission torque that is transmitted from a drive-side member of a clutch to a driven-side member of the clutch, and target transmission torque that is supposed to be transmitted from the drive-side member to the driven-side member. The clutch controller also determines whether or not a difference in rotational speed between the drive-side member and the driven-side member of the clutch is reduced at an appropriate rate, and depending on the determination result, corrects the target transmission torque.
Claims9
A clutch controller comprising:
- an actuator for changing a degree of engagement between a drive-side member and a driven-side member of a clutch;
- an actual torque obtaining section for obtaining torque transmitted from the drive-side member to a downstream mechanism of a torque transmission path as actual transmission torque, the downstream mechanism including the driven-side member;
- a target torque obtaining section for obtaining torque that is supposed to be transmitted from the drive-side member to the downstream mechanism as target transmission torque;
- and
- a control unit for controlling the degree of engagement of the clutch by actuating the actuator based on a difference between the actual transmission torque and the target transmission torque,
- wherein the target torque obtaining section includes a determining section for determining whether or not a difference in rotational speed between the drive-side member and the driven-side member is reduced at an appropriate rate, and depending on the determination result, corrects the target transmission torque.
A method for controlling a clutch comprising the steps of:
- obtaining torque transmitted from a drive-side member of the clutch to a downstream mechanism in a torque transmission path as actual transmission torque, the downstream mechanism including a driven-side member of the clutch;
- obtaining torque that is supposed to be transmitted from the drive-side member to the downstream mechanism as target transmission torque;
- controlling a degree of engagement of the clutch by actuating an actuator based on a difference between the actual transmission torque and the target transmission torque;
- determining whether or not a difference in rotational speed between the drive-side member and the driven-side member is reduced at an appropriate rate;
- and
- correcting the target transmission torque depending on the determination result from the determining step.
Dependencies are inferred from the claim text.