Patent ID: 6733299
Filing Date: 2004-05-11
Classification: B60K,B60W,F16D,F16H,Y02T,Y10T

Abstract:
A vehicular power transmission comprising:a drive-power transmission, which transmits a rotational driving force from an engine to wheels; a frictionally engaging element, which can set variably a transmission capacity for said drive-power transmission; and a transmission-capacity controller, which controls an engagement actuation of said frictionally engaging element; wherein: while a vehicle is decelerating with a control to engage said frictionally engaging element being executed for transmitting a rotational driving force from said wheels to said engine, said transmission-capacity controller controls an engaging capacity of said frictionally engaging element to bring a difference between input and output rotational speeds of said frictionally engaging element into a predetermined range; and said transmission-capacity controller stores and renews in memory and learns a controlled amount of said frictionally engaging element that has produced said difference which is within said predetermined range, as a control value for a next deceleration, wherein while the vehicle is decelerating with a rotational driving force being transmitted from said engine, said transmission-capacity controller controls said engaging capacity to increase said difference between the input and output rotational speeds to a value above said predetermined range.