Patent ID: 6761659
Filing Date: 2004-07-13
Classification: B60K,B60W,F16H,Y02T,Y10S,Y10T

Abstract:
A method for controlling engagement of a frictionally engaging element in a power transmission, through which engagement control of said frictionally engaging element, rotational output of an engine is adjusted and transmitted to drive wheels, comprising:measuring or a parameter which corresponds to the rotational speed of said engine while said frictionally engaging element is being actuated from a disengaged condition to an engaged condition, with said engine being operated under a constant operational condition; calculating an engagement-control value for said frictionally engaging element when there is a change in said parameter, which corresponds to the rotational speed of said engine, being measured; storing said calculated engagement-control value as an initial control value for starting an engaging action of said frictionally engaging element; and using said initial control value to control the engagement of said frictionally engaging element, wherein said parameter is a suction negative pressure of said engine; and wherein, when the suction negative pressure of said engine changes to a higher load side and when the rotational speed of said engine decreases, said engagement-control value for said frictionally engaging element is stored as said initial control value.