Fluid coupling launch device

摘要

A launch device for a vehicle transmission includes a housing, an impeller, a turbine; and first and second clutches. The first and second clutches include 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 first piston. In an example embodiment, the first clutch is disposed radially outside of the second clutch and at least a portion of the first piston is disposed axially between the housing and the second piston. 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.

主权项

1. A launch device for a vehicle transmission comprising:
a housing an impeller; a turbine; first and second clutches comprising first and second pistons, respectively, the first and second pistons sealingly engaged with one another; and, a release spring disposed axially between the first and second pistons, wherein:the first clutch releaseably engages the impeller with the housing;the second clutch releaseably engages the turbine with the first piston; and,the release spring urges the second clutch into an open position.