Patent ID: 6708804
Filing Date: 2004-03-23
Classification: F16H

Abstract:
A hydrodynamic converter for transmission of torque between rotary driving and driven components, comprising:a rotary housing including a pump and arranged to receive torque from said driving component; a rotary turbine disposed in said housing and arranged to receive torque from said pump for transmission of torque to said driven component; a lockup clutch provided in said housing and including a piston rotatable with said driving component and defining a first chamber with said housing and a second chamber with said turbine, said clutch being disengageable in response to admission of a pressurized hydraulic fluid into said first chamber to move said piston toward said turbine and said clutch being disengageable in response to admission of hydraulic fluid into said second chamber along a first path to move said piston toward said housing; means for admitting into said second chamber the pressurized hydraulic fluid along at least one second path; and means for at least partially sealing said second path in a disengaged condition of the clutch, wherein at least one passage is provided in the turbine and in communication with one of the chambers when the hydraulic fluid is introduced into the one chamber and wherein when the clutch is in a disengaged position, the passage is closed and a connection exists between the first chamber and the second chamber on either side of the clutch.