TRANSMISSION CONTROL DEVICE OF MOTORCYCLE

摘要

To provide a transmission control device of a motorcycle which can detect a predetermined traveling state based on the difference in rotational speed between a front wheel and a rear wheel, and can execute a shift-change contr ol suitable for the traveling state. A transmission control device of a motorcycle includes a shift-change control instruction part for performing an automatic shift change of an AMT (automatic manual transmission) in response to at least vehicle-speed information, a first sensor for detecting a rotational speed of a front wheel WF which constitutes a driven wheel, a second sensor for detecting a rotational speed of a rear wheel WR which constitutes a drive wheel, and a rotational-speed-difference detection means for detecting the difference in rotational speed between the front wheel and the rear wheel. T he control part inhibits the automatic shift change when the rotational speed o f the rear wheel WR becomes larger than the rotational speed of the front whee l WF by a predetermined value or more. The transmission control device is configured to interrupt the transmission of a driving force to the rear whee l WR by disconnecting a clutch by driving a valve 4 when a separation quantity between the front wheel WF and a road surface becomes a predetermined value ormore during the inhibition of the automatic shift change. The separation quantity between the front wheel WF and the road surface is obtained by measuring a distance between the front wheel WF and the road surface using a photo sensor.