Fluid coupling launch device
AssigneeSchaeffler Technologies AG & Co. KG
InventorsTodd Sturgin, Philip George, Jeffrey Hemphill
Life of this patent
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Abstract
A launch device for a vehicle transmission including a housing, an impeller, a turbine, and first and second clutches with first and second pistons, respectively. The first and second pistons are sealingly engaged with one another. The first clutch releaseably engages the impeller with the housing and the second clutch releaseably engages the turbine with the housing. In an example embodiment, the first clutch is disposed radially outside of the second clutch. In an example embodiment, the first clutch is engaged by a first pressure, and the second clutch is engaged by a second pressure greater than the first pressure.
Claims20
A launch device for a vehicle transmission comprising:
- a housing
- an impeller;
- a turbine;
- and
- first and second clutches comprising first and second pistons, respectively, the first and second pistons sealingly engaged with one another, wherein:
- the first clutch releaseably engages the impeller with the housing;
- and
- the second clutch releaseably engages the turbine with the housing.
A launch device for a transmission comprising:
- a housing sealingly engaged with the transmission;
- a first piston;
- and,
- a second piston, wherein the second piston is sealingly engaged with the first piston and arranged for sealing engagement with an input shaft of the transmission.
A launch device for a vehicle transmission comprising:
- a housing
- an impeller;
- a turbine;
- a first clutch, including a first piston, arranged to engage the impeller with the housing;
- a second clutch, including a second piston, arranged to engage the turbine with the housing;
- and,
- a spring, wherein:
- the first piston is located radially outward of the second piston and is sealed with respect to the second piston;
- and
- the spring urges the second clutch to an open position.
Dependencies are inferred from the claim text.