Patent ID: 6631318
Filing Date: 2003-10-07
Classification: F16H,Y10T

Abstract:
A transmission system for a vehicle including a synchromesh-type transmission, comprising:an input shaft rotated corresponding to driving power from a driving power source; an idle gear idly mounted on the input shaft; an output shaft having a counter gear engaged with the idle gear and transmitting the driving power to a drive wheel; a synchromesh mechanism including a sleeve rotatable with the input shaft and movable in an axial direction of the input shaft wherein a synchronizing operation is performed in accordance with an engaging operation of the sleeve and the idle gear; a shift actuator for moving the sleeve depending on a shift operation; a detecting means for detecting an angular speed or an angular acceleration of the input shaft when the synchronizing operation is performed in accordance with the engaging operation of the sleeve and the idle gear; a sleeve load estimating means for estimating load applied to the sleeve based upon a detection signal by the detecting means; and a controlling means including said sleeve load estimating means, said controlling means for controlling an operation of the shift actuator based upon the estimated load applied to the sleeve.