초록 ▼

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

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.

대표청구항 ▼

The invention claimed is: 1. 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 con

The invention claimed is: 1. 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. 2. The hydrodynamic torque converter according to claim 1, wherein said control unit (11) has one valve unit, a pressure medium supply of which is connected with a pressure medium acting upon said first piston area (4) and which depending on a nominal value setting (12) connects the pressure medium acting upon said first piston area (4) with a pressure medium acting upon said second piston area (5). 3. The hydrodynamic torque converter according to claim 2, wherein a space (10) formed by said converter housing (1) and said first piston area (4) is connected via one line (9) with said valve unit (11). 4. The hydrodynamic torque converter according to claim 3, wherein said line (9) is located in a non-rotatable shaft connected with a stator. 5. The hydrodynamic torque converter according to claim 1, wherein said control unit (11) has one valve unit connected with a pressure medium acting upon said first piston area (4), the valve unit receives a pressure medium supply (16) connected with a pressure medium source of a transmission pump and which depending on a nominal value setting (12) and the internal hydraulic pressure, acts upon said second piston area. 6. The hydrodynamic torque converter according to claim 1, wherein a pressure sensor (17) determines the hydraulic pressure acting upon said first piston area (4) and an electronic control unit (18) adjusts the hydraulic pressure acting upon said second piston area (5) depending on a nominal value setting. 7. The hydrodynamic torque converter according to claim 6, wherein one rotational speed sensor (20) determines a rotational speed of a pump impeller (6) and said electronic control unit ( 18), depending on a rotational speed of said pump impeller (6), adjusts the pressure acting upon said first piston area (4) and a nominal speed setting the pressure acting upon said second piston area. 8. The hydrodynamic torque converter according to claim 1, wherein a supply line (13) of the pressure medium acting upon said second piston area (5) is located in a non-rotatable shaft connected with a stator. 9. 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. 10. The hydrodynamic torque converter according to claim 9, wherein said control unit (11) comprises a valve unit receiving a pressure medium supply from the first piston area (4) at the internal hydraulic pressure and connecting the pressure medium supply tome second piston area (5) with the internal hydraulic pressure altered according to a nominal value setting (12) of the valve unit to obtain the second hydraulic pressure acting on the second piston area (5) and a differential hydraulic pressure which actuates the at least one piston (3). 11. The hydrodynamic torque converter according to claim 10, wherein a space (10) formed by said converter housing (1) and said first piston area (4) is connected via a hydraulic line (9) with said valve unit (11). 12. The hydrodynamic torque converter according to claim 11, wherein said hydraulic line (9) is located in a non-rotatable shaft connected with a stator. 13. The hydrodynamic torque converter according to claim 9, wherein said control unit (11) comprises a valve unit receiving the internal pressure medium from the first piston area (4) at the internal hydraulic pressure, the valve unit also receiving a second pressure medium supply (16) from a transmission pump and connecting the second pressure medium supply (16) to the second piston area (5), with the second pressure medium supply altered according to the internal hydraulic pressure and a nominal value setting (12) of the valve unit to obtain the second hydraulic pressure acting on the second piston area (5) and a differential hydraulic pressure which actuates the at least one piston (3). 14. The hydrodynamic torque converter according to claim 9, 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. 15. The hydrodynamic torque converter according to claim 14, wherein a rotational speed sensor (20) determines a rotational speed of the pump impeller (6), and said electronic control unit (18) adjusts the second hydraulic pressure according to the rotational speed of said pump impeller (6) and the internal hydraulic pressure acting upon said first piston area (4). 16. The hydrodynamic torque converter according to claim 9, wherein a hydraulic supply line (13) for the second hydraulic pressure acting upon said second piston area (5) is located in a non-rotatable shaft connected with a stator. 17. 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. 18. The hydrodynamic torque converter according to claim 17, wherein a rotational speed sensor (20) determines a rotational speed of the pump impeller (6), and said electronic control unit (18) adjusts the second hydraulic pressure according to the rotational speed of said pump impeller (6) and the internal hydraulic pressure acting upon said first piston area (4).