HYDRODYNAMIC TRANSMISSION

• US 3,716,995 A
• Filed: 09/16/1971
• Issued: 02/20/1973
• Est. Priority Date: 09/16/1971
• Status: Expired due to Term

• Current Assignee: Hans Hanke, Wolfgang Peter
• Original Assignee: Hans Hanke, Wolfgang Peter
• Inventors: Peter, Wolfgang, Hanke, Hans
• Primary Examiner(s): Geoghegan, Edgar W.
• Application Number:
  US05/181,006
• Time in Patent Office: 523 Days
• Field of Search: 60/54,DIG.5
• US Class Current: 60/358
• CPC Class Codes: F16D 33/16 by means arranged externally of the coupling or clutch mounting of such means in vehicles B60K23/00, e.g. B60K23/02
• CPC Class Codes: Y10S 60/912 Cooling means

Abstract

A hydrodynamic transmission whose degree of filling and therewith whose transmission capability is adapted to be controlled by an external circulation equipped with a control valve; a gap is thereby provided at the outer diameter of the working space between the inside of the pump shell and the outside of the turbine shell through which working medium is continuously discharged into a stationary spiral housing that is connected with the external circulation terminating at its other end directly in the inlet of the pump; the external circulation is connected with the control valve by way of a single line while the circulation containing the filling pump is also connected with this control valve.

Claims

1. A hydrodynamic transmission whose degree of filling and therewith whose transmission capacity is adapted to be controlled by an external circulatory system having a control valve means, characterized in that corresponding pump and turbine blade parts of pump and turbine means mutually face one another in the axial direction to form a working space, and in that a gap is provided substantially at the outer diameter of the working space between the inside of the pump shell and the outside of the turbine shell, said gap conducting a portion of the working medium continuously discharged thereby out of the transmission into a stationary housing means, the external circulatory system being connected with said housing means and being operatively connected with the control valve means by way of only a single control line, and a filling pump circulation means being operatively connected also with said control valve means.

2. A transmission according to claim 1, characterized in that the external circulatory system is connected directly with the inlet channel of the pump means.

3. A transmission according to claim 1, characterized in that said gap is in communication with a spiral channel in said housing means.

4. A transmission according to claim 1, characterized in that the pump shell overlaps the turbine shell both in proximity to the axis as well as at the periphery.

5. A transmission according to claim 1, characterized in that the supply of working medium into the transmission or discharge of the working medium out of the transmission is controlled by way of the control valve means by changing the pressure in a control line in relation to the pressure in the working space.

6. A transmission according to claim 5, characterized in that the control valve means is provided with a control line connection, with a filling pump connection and with an oil sump connection terminating in a common chamber, and in that the control line connection has a constant communication with the filling pump connection whereas the oil sump connection is adapted to be more or less closed by movement of a control piston means in the control valve means for the control of the supply to and discharge out of the valve means.

7. A transmission according to claim 6, characterized in that the movement of the control piston means is selective.

8. A transmission according to claim 6, characterized in that the movement of the control piston means is automatic.

9. A transmission according to claim 6, characterized in that the oil sump connection is adapted to be completely closed by said control piston means.

10. A transmission according to claim 6, characterized in that the valve means includes a control valve housing means, the control line connection and the filling pump connection being arranged substantially mutually opposite one another on the control valve housing means and the diameter of the control piston means, which within the area of said two last mentioned connections, has a lesser diameter than the inner diameter of the chamber of the control valve housing means, increases in the direction toward the oil sump connection up to a control edge which is disPosed within the area of the oil sump connection and sealingly abuts the inner surface of the chamber of the control valve housing means.

11. A transmission according to claim 10, characterized in that the diameter of the piston increases conically in the direction toward the oil sump connection.

12. A transmission according to claim 10, characterized in that the control piston means includes a flange-like piston step sealingly abutting at the inner wall of the valve housing means on the side opposite the control edge within the area between the control line and filling pump connections and one cylinder end wall, and in that a throttle bore extends in the axial direction through the flange-like piston step.

13. A transmission according to claim 12, characterized in that the control valve housing means is provided within the area of the other end wall with connecting means for a control medium.

14. An installation according to claim 13, characterized in that a cooling means is arranged in the external circulatory system.

15. An installation according to claim 14, characterized in that a cutoff valve means is arranged in the external circulatory system which automatically interrupts the external circulatory system when the pressure in the transmission decreases to a predetermined value.

16. A transmission according to claim 15, characterized in that said gap is in communication with a spiral channel in said housing means.

17. A transmission according to claim 16, characterized in that the external circulatory system is connected directly with the inlet channel of the pump means.

18. A transmission according to claim 17, characterized in that the pump shell overlaps the turbine shell both in proximity to the axis as well as at the periphery.

19. A transmission according to claim 1, characterized in that the control valve means is provided with a control line connection, with a filling pump connection and with an oil sump connection terminating in a common chamber, and in that the control line connection has a constant communication with the filling pump connection whereas the oil sump connection is adapted to be more or less closed by movement of a control piston means in the control valve means for the control of the supply to and discharge out of the valve means.

20. A transmission according to claim 19, characterized in that the valve means includes a control valve housing means, the control line connection and the filling pump connection being arranged substantially mutually opposite one another on the control valve housing means and the diameter of the control piston means, which within the area of said two last mentioned connections, has a lesser diameter than the inner diameter of the chamber of the control valve housing means, increases in the direction toward the oil sump connection up to a control edge which is disposed within the area of the oil sump connection and sealingly abuts the inner surface of the chamber of the control valve housing means.

21. A transmission according to claim 20, characterized in that the diameter of the piston increases conically in the direction toward the oil sump connection.

22. A transmission according to claim 20, characterized in that the control piston means includes a flange-like piston step sealingly abutting the inner wall of the valve housing means on the side opposite the control edge within the area between the control line and filling pump connections and one cylinder end wall, and in that a throttle bore extends in the axial direction through the flange-like piston step.

23. A transmission according to claim 22, characterized in that the control valve housing means is provided within the area of the other end wall with connecting means for a control medium.

24. An installation according to claim 1, characterized in that a cooling means is arranged in the external circulatory system.