Shift control method adopted in electric-power-assist-type...

Details Shift control method adopted in electric-power-assist-type... Shift control method adopted in electric-power-assist-type...

F - Mech Eng,Light,Heat,Weapons

16

H

F16H 61/28 (2006.01) F16D 48/06 (2006.01) F16H 61/00 (2006.01) F16H 61/02 (2006.01) F16H 63/18 (2006.01) F16H 63/46 (2006.01)

Patent

CA 2245071

[Object]~It is an object of the present invention to provide an electric-power-assist-type transmission and a shift control method which allow good operatability to be obtained. [Solution Means] In a shift control method to be adopted in an electric-power-assist-type transmission for engaging a sleeve with a target gear whereby a shift spindle is rotated by a driving motor in order to move the sleeve along a main shaft by using a shift fork and a shift drum interlocked with the shift spindle, when the sleeve is moved to a position in contact with the target gear, PWM control is executed at a duty ratio of 70% during the first 20 mS. Thereafter, the PWM control is executed by changing the duty ratio to 50% and restoring the duty ratio back to 70% repeatedly at intervals of 10 mS.

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