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US 7,017,722 B2Granted
Hydrodynamic torque converter
AssigneeZF Friedrichshafen AG
InventorFritz Leber
Life of this patent
Estimating the term…
Abstract
To control one clutch (2) in a hydrodynamic torque converter, the pressure acting upon one first piston area (4) is supplied to a control unit which, depending on the pressure, adjusts the pressure acting upon a second piston area (5). It is possible to exactly adjust the piston force acting upon a clutch (2) even in the presence of changing pressure ratios within the hydrodynamic torque converter.
Claims18
A hydrodynamic torque converter located in a housing (1) comprising:
- at least one clutch (2);
- an actuation device having at least one piston (3);
- a hydraulic pressure within said housing (1) acting upon a first piston area (4);
- a hydraulic pressure changeable by a control unit (11) acting upon a second piston area (5);
- the hydraulic pressure acting upon said first piston area (4) acting directly or indirectly upon said control unit (11) and said control unit (11) adjusts the hydraulic pressure upon said second piston area (5) depending on the hydraulic pressure upon said first piston area (4);
- and
- wherein one drive mechanism of said torque converter (1) is connectable via said at least one clutch (2) with one pump impeller (6) of said torque converter.
4 more elements
A hydrodynamic torque converter located in a housing (1) comprising:
- a drive mechanism connectable via an input clutch (2) to a pump impeller within said torque converter housing;
- an actuation device for closing the input clutch (2) and connecting the drive mechanism to the pump impeller, the actuation device comprising at least one piston (3) having a first piston area (4) and an oppositely disposed second piston area (5);
- an internal hydraulic pressure within said housing (1) acting upon the first piston area (4) and a second hydraulic pressure changeable by a control unit (11) acting upon the second piston area (5);
- wherein the internal hydraulic pressure acting upon said first piston area (4)is applied to said control unit (11) and said control unit (11) adjusts the second hydraulic pressure upon said second piston area (5) depending on the internal hydraulic pressure to regulate the input clutch connecting the drive mechanism to the pump impeller.
1 more element
A hydrodynamic torque converter located in a housing (1) comprising:
- a drive mechanism connectable via an input clutch (2) to a pump impeller within said torque converter housing;
- an actuation device for closing the input clutch (2) and connecting the drive mechanism to the pump impeller, the actuation device comprising at least one piston (3) having a first piston area (4) and an oppositely disposed second piston area (5);
- an internal hydraulic pressure within said housing (1) acting upon the first piston area (4) and a second hydraulic pressure changeable by a control unit (11) acting upon the second piston area (5);
- the internal hydraulic pressure acting upon said first piston area (4) is applied to said control unit (11) and said control unit (11) adjusts the second hydraulic pressure upon said second piston area (5) depending on the internal hydraulic pressure to regulate the input clutch connecting the drive mechanism to the pump impeller;
- and
- wherein a pressure sensor (17) determines the internal hydraulic pressure acting upon said first piston area (4) and an electronic control unit (18) adjusts the second hydraulic pressure acting upon said second piston area (5) depending on a nominal value setting.
3 more elements
Dependencies are inferred from the claim text.