Clutch failure detection system, straddle-type vehicle, and method for detecting failure
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorKengo Minami
Life of this patent
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Abstract
A failure detection system for accurately detecting a failure of a clutch. A clutch actuation mechanism changes the relative positions of drive-side and driven-side members of the clutch. A position detector detects a position of the clutch actuation mechanism as a clutch position. A control unit obtains torque transmitted from the drive-side member to the driven-side member as actual transmission torque. The control unit detects a failure of the clutch based on the actual transmission torque and the clutch position.
Claims20
A clutch failure detection system comprising:
- a clutch actuation mechanism for changing relative positions of a drive-side member and a driven-side member of a clutch;
- a position detector for detecting a position of the clutch actuation mechanism as a clutch position;
- a torque obtaining section for obtaining torque transmitted from the drive-side member to a downstream mechanism in a torque transmission path as transmission torque, the downstream mechanism including the driven-side member;
- and
- a failure detecting section for detecting a failure of the clutch based on the transmission torque and the clutch position, wherein the failure detecting section obtains the clutch position and the transmission torque at a plurality of times in a process that the clutch is switched from a disengaged state to an engaged state and classifies a plurality of data, that are each based upon the obtained clutch position and the transmission torque at one of the plurality of times, into one of a plurality of regions including a first region and a second region, when a predetermined number of data are classified into the plurality of regions the failure detecting section
- detects the failure of the clutch when a first number of the plurality of data that are classified into the first region exceeds a second number of the plurality of data that are classified into the second region, and
- detects there is no failure of the clutch when the first number does not exceed the second number.
A method for detecting a clutch failure comprising the steps of:
- (i). detecting a position of a clutch actuation mechanism for changing relative positions of a drive-side member and a driven-side member of a clutch as a clutch position;
- (ii). obtaining torque transmitted from the drive-side member to a downstream mechanism in a torque transmission path as transmission torque, the downstream mechanism including the driven-side member;
- (iii). classifying a plurality of data, that are each based upon the detected clutch position and the obtained transmission torque at one of a plurality of times that the clutch is switched from a disengaged state to an engaged state, into one of a plurality of regions including a first region and a second region;
- and
- (iv). determining whether a failure of the clutch exists when a predetermined number of data are classified into the plurality of regions, the failure of the clutch being determined to exist if a first number of the plurality of data that are classified into the first region exceeds a second number of the plurality of data that are classified into the second region, and failure of the clutch is determined to not exist if the first number does not exceed the second number.
Dependencies are inferred from the claim text.