Method of controlling speed reduction ratio for continuously...

Details Method of controlling speed reduction ratio for continuously... Method of controlling speed reduction ratio for continuously...

F - Mech Eng,Light,Heat,Weapons

16

H

138/41.12

F16H 61/46 (2006.01)

Patent

CA 1305016

Abstract A method of controlling a speed reduction ratio in a continuously variable speed transmission comprises detecting a vehicle speed when a vehicle is decelerated by utilizing an engine brake with an accelerator opening being essentially zero, determining a reference speed reduction ratio corresponding to the detected vehicle speed, detecting an actual vehicle speed change rate, detecting an allowable vehicle speed change rate, comparing the actual change rate with said allowable vehicle speed change rate, determining a corrected speed reduction ratio by adding a correction to the reference speed reduction ratio based on a difference between the actual vehicle speed change rate and the allowable vehicle speed change rate, controlling the speed reduction ratio of the continuously variable speed transmission so as to coincide with the corrected speed reduction ratio.

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