Lock-up control apparatus and method for torque converter of aut

Details Lock-up control apparatus and method for torque converter of aut Lock-up control apparatus and method for torque converter of aut

1997-07-14

1999-03-16

Wright, Dirk

Interrelated power delivery controls, including engine control

Clutch control

With fluid drive

477174, F16H 6114

Patent

active

058822798

ABSTRACT:
A lock-up control apparatus and method for a torque converter of an automatic power transmission associated with a vehicular internal combustion engine driven in a plurality of engine driving modes, such as a lean burn mode. A lock-up region of a map for the torque converter is modified toward a higher vehicle speed when the engine operates in one of the driving modes such that an engine output torque value becomes large under the same engine load conditions as those when the engine is driven in any one of the other driving modes in which the engine output torque is small. The lock-up region is extended up to a higher engine load region when the engine operates in one of the driving modes such that the engine output torque is small under the same load condition.

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