Fluid power transmission with a lock-up clutch
AssigneeToyota Jidosha Kabushiki Kaisha
InventorKiyohito Murata
Life of this patent
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Abstract
A fluid power transmission which comprises: a pump impeller; a turbine runner; a housing accommodating the pump impeller and the turbine runner; a lock-up clutch adapted to be engaged with and released from a front cover integrated with the pump impeller; and a viscous coupling including an annular drive member and an annular driven member for transmitting torque inbetween through viscous fluid. The drive member is connected to the lock-up clutch, whereas the driven member is connected to a hub which is integrated with the turbine runner. Further comprised is a second clutch which is engaged, after the lock-up clutch has been engaged, to connect the drive member and the driven member mechanically.
Claims26
A fluid power transmission comprising:
- a pump impeller;
- a turbine runner;
- a housing accommodating said pump impeller and said turbine runner;
- a lock-up clutch adapted to be engaged with and released from a first member integrated with said pump impeller;
- and
- a viscous coupling including an annular drive member and an annular driven member for transmitting torque, through viscous fluid, between said drive and driven members, said drive member being connected to said lock-up clutch, and said driven member being connected to a second member integrated with said turbine runner,
- wherein the improvement comprises clutch means engageable, after said lock-up clutch has been engaged, to connect said drive member and said driven member mechanically.
Dependencies are inferred from the claim text.