초록 ▼

A lock-up clutch for a hydrodynamic torque converter which includes at least one piston which can be displaced in the axial direction and can be connected to the converter housing by means of at least one friction zone, which piston defines, by means of the side which faces the converter housing, a

A lock-up clutch for a hydrodynamic torque converter which includes at least one piston which can be displaced in the axial direction and can be connected to the converter housing by means of at least one friction zone, which piston defines, by means of the side which faces the converter housing, a chamber in which, when the lock-up clutch is active, the pressure is lower than the pressure in the converter circuit, and which, in the vicinity of a friction zone, has at least one channel for the flow of hydraulic fluid from the converter circuit. The quantitative flow of hydraulic fluid is a function of the pressure exerted by the converter. The lock-up clutch further includes at least one friction zone which has at least one friction lining, whereby the lock-up clutch has a total of at least two friction linings of different axial dimensions which, in the event of different pressures acting in the converter, come into at least partial effective connection with the matching friction surfaces.

대표청구항 ▼

[ What is claimed is:] [22.] A hydrodynamic torque converter having a lock-up clutch, said hydrodynamic torque converter comprising:a torque converter housing having an axis of rotation;said torque converter housing being configured to receive an input torque and to be rotatingly driven about said a

[ What is claimed is:] [22.] A hydrodynamic torque converter having a lock-up clutch, said hydrodynamic torque converter comprising:a torque converter housing having an axis of rotation;said torque converter housing being configured to receive an input torque and to be rotatingly driven about said axis of rotation;a first hydraulic chamber disposed within said torque converter housing and containing a hydraulic fluid;pump wheel disposed within said first hydraulic chamber and connected to said torque converter housing;a turbine wheel additionally disposed within said first hydraulic chamber and in opposition to said pump wheel; anda lock-up clutch for transferring at least some of said input torque from said torque converter housing to said turbine wheel, said lock-up clutch comprising:a piston disposed within said torque converter housing and defining a second hydraulic chamber, said second hydraulic chamber being disposed between said piston and said torque converter housing;said hydraulic fluid additionally being disposed within said second hydraulic chamber;said piston being displaceable along said axis of rotation of said torque converter housing;said piston having a first side facing said first hydraulic chamber, and said piston having a second side facing said second hydraulic chamber;a clampable member disposed between said piston and said torque converter housing;an arrangement to displace said piston along said axis of rotation to thereby clamp said clampable member between said piston and said torque converter housing;said clampable member comprising:structure to frictionally engage with at least one of said piston and said torque converter housing;said frictional engagement structure comprising:a first friction lining;said first friction lining having a first elasticity; anda second friction lining;said second friction lining having a second elasticity;said first elasticity being substantially different than said second elasticity;at least one of said first friction lining and said second friction lining comprising at least one flow channel for providing a flow of said hydraulic fluid between said first chamber and said second chamber; andsaid at least one flow channel being elastically deformable as a function of the clamping pressure exerted on said clampable member by said piston and said torque converter housing to permit greater initial flow of said hydraulic fluid between said first chamber and said second chamber upon application of a first clamping pressure on said clampable member, and a lesser flow of said hydraulic fluid upon an increase in the clamping pressure on said clampable member.