Automatic gear control device
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKazuaki Nakamura, Hiromichi Kimura, Shun Minaki, Koji Oshima, Tomohiro Asami, Takahiro Kondo
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Abstract
An ECU executes a program including: a step of detecting a turbine revolution speed, a step of detecting an engine torque TE, a step of detecting a speed change ratio, a step of setting a range an enlarged slip region when a slip region enlargement condition is satisfied, and a step of enlarging the slip region toward a lock-up region side (high-load side).
Claims5
A control device of an automatic transmission formed of a multi-gear or continuously variable transmission mechanism and a lockup clutch arranged between said transmission mechanism and a drive source, wherein when said lockup clutch is used in a slip region, control is performed to attain a slippage equal to the target slippage, using a learned value learned in said slip region, said control device comprising:
- a region enlarging unit which enlarges said slip region to increase a frequency of learning in said slip region, and
- a learning control unit which learns the slippage with respect to an amount of operation in said slip region and obtaining said learned value,
- wherein said region enlarging unit enlarges said slip region toward a lockup region in which said lockup clutch is completely engaged.
A control device of an automatic transmission formed of a multi-gear or continuously variable transmission mechanism and a lockup clutch arranged between said transmission mechanism and a drive source, wherein when said lockup clutch is used in a slip region, control is performed to attain a slippage equal to the target slippage, using a learned value learned in said slip region, said control device comprising:
- region enlarging means for enlarging said slip region to increase a frequency of learning in said slip region, and
- learning control means for learning the slippage with respect to an amount of operation in said slip region and obtaining said learned value,
- wherein said region enlarging means includes means for enlarging said slip region toward a lockup region in which said lockup clutch is completely engaged.
A control device of an automatic transmission formed of a multi-gear or continuously variable transmission mechanism and a lockup clutch arranged between said transmission mechanism and a drive source, wherein when said lockup clutch is used in a slip region, control is performed to attain a slippage equal to the target slippage, using a learned value learned in said slip region, said control device comprising:
- an electronic control unit (ECU),
- wherein said electronic control unit (ECU) enlarges said slip region toward a lockup region in which said lockup clutch is completely engaged to increase a frequency of learning in said slip region, and obtains said learned value by learning the slippage with respect to an amount of operation in said slip region.
Dependencies are inferred from the claim text.