Vehicular power transmission
First Claim
1. 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.
1 Assignment
0 Petitions
Accused Products
Abstract
A power transmission comprises a continuously variable transmission CVT, which transmits a rotational driving force from an engine to wheels, a starting clutch 5, which sets variably the transmission capacity of the continuously variable transmission, and a control valve CV, which controls the engagement actuation of the starting clutch 5. While a vehicle equipped with this power transmission is decelerating, the engagement of the starting clutch is controlled to transmit a rotational driving force from the wheels to the engine. Specifically, the engaging capacity of the starting clutch is controlled to bring the difference between the input and output rotational speeds of the starting clutch into a predetermined range, and the control pressure of the starting clutch that brings this difference in the predetermined range is learned, i.e., stored in memory and renewed, as a control value for the next deceleration of the vehicle.
4 Citations
8 Claims
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1. A vehicular power transmission comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification