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Vehicular power transmission

  • US 6,733,299 B2
  • Filed: 09/05/2002
  • Issued: 05/11/2004
  • Est. Priority Date: 10/16/2001
  • Status: Expired due to Term
First Claim
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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, 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.

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