Fluid transmitting device with lock-up clutch
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United States of America Patent
Stats
-
May 4, 2004
Grant Date -
Apr 10, 2003
app pub date -
Aug 22, 2002
filing date -
Aug 22, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fluid transmitting device includes a side cover connected to a pump impeller and defining a clutch chamber between the side cover and an outer surface of a turbine runner, and a lock-up clutch which includes a clutch piston connected to the turbine runner. The clutch chamber is divided by the clutch piston into an inner oil chamber and an outer oil chamber. The inner oil chamber is divided into primary and secondary inner oil chamber sections provided between the turbine runner and the clutch piston. Upon operation of a lock-up control device, the clutch piston is urged in a clutch switch-on direction, pressure in the primary inner oil chamber section relative to the outer oil chamber is raised and then pressure in the secondary inner oil chamber section is raised relative to the outer oil chamber.
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