GEARBOX FOR A MOTOR VEHICLE

• US 20150345616A1
• Filed: 05/27/2015
• Published: 12/03/2015
• Est. Priority Date: 05/30/2014
• Status: Active Grant

• Current Assignee: Getrag Getriebe- und Zahnradfabrik Hermann Hagenmeyer GmbH & CIE KG
• Original Assignee: Getrag Getriebe- und Zahnradfabrik Hermann Hagenmeyer GmbH & CIE KG
• Inventors: Schweiher, Mark, Eggert, Ulrich, Hegerath, Andreas
• Granted Patent: US 9,739,363 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F16H 57/0409 characterised by the problem to increase efficiency, e.g. by reducing splash losses
• CPC Class Codes: F16H 57/0436 Pumps
• CPC Class Codes: F16H 57/0446 the supply forming part of the transmission control unit, e.g. for automatic transmissions
• CPC Class Codes: F16H 57/0447 Control of lubricant levels, e.g. lubricant level control dependent on temperature
• CPC Class Codes: F16H 57/045 Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
• CPC Class Codes: F16H 57/0457 Splash lubrication characterised by the problem reducing losses, e.g. splash losses F16H57/0409
• CPC Class Codes: F16H 57/0473 Friction devices, e.g. clutches or brakes

Abstract

A gearbox for a motor vehicle. The gearbox comprises at least one fluid supply system. The fluid supply system comprises at least one pump. The fluid supply system comprises at least one fluid sump. The fluid supply system comprises at least one fluid reservoir. The fluid reservoir comprises at least a first fluid outflow leading into the fluid sump. The first fluid outflow can be controlled as a function of a state variable.

Claims

1. A gearbox for a motor vehicle, wherein the gearbox comprises at least one fluid supply system, wherein the fluid supply system comprises at least one pump, wherein the fluid supply system comprises at least one fluid sump, wherein the fluid supply system comprises at least one fluid reservoir, wherein the fluid reservoir comprises at least a first fluid outflow leading into the fluid sump, wherein the first fluid outflow can be controlled as a function of a state variable.

2. The gearbox according to claim 1, wherein the gearbox comprises at least one clutch.

3. The gearbox according to claim 1, wherein the state variable is a fluid supply variable, wherein the fluid supply variable comprises at least one variable selected from:

a fluid pressure;

a fluid volume flow;

a rotational speed of the pump;

a rotational speed of a pump motor;

a rotational direction of the pump;

a rotational direction of the pump motor;

a fluid requirement and a banking-up pressure.

4. The gearbox according to claim 1, wherein the first fluid outflow is controllable at least one of actively and passively.

5. The gearbox according to claim 1, wherein the first fluid outflow comprises one or more orifices or one or more restrictors.

6. The gearbox according to claim 1, wherein the first fluid outflow comprises at least one valve.

7. The gearbox according to claim 6, wherein the valve includes a temperature-dependent valve.

8. The gearbox according to claim 6, wherein the valve includes a pressure-dependent valve.

9. The gearbox according to claim 6, wherein the valve includes a temperature-dependent and pressure-dependent valve.

10. The gearbox according to claim 1, wherein the fluid supply system comprises at least a second fluid outflow, wherein the second fluid outflow cannot be regulated.

11. The gearbox according to claim 1, wherein the gearbox comprises at least one sensing device for sensing the state variable.

12. The gearbox according to claim 11, wherein the sensing device includes a pressure sensor.

13. The gearbox according to claim 11, wherein the sensing device includes a rotational speed sensor.

14. The gearbox according to claim 11, wherein the sensing device includes rotational direction sensor.

15. The gearbox according to claim 1, wherein the fluid reservoir can be filled by means of at least one of sprayed fluid and fluid diverted by at least one orifice.

16. The gearbox according to claim 1, wherein the fluid supply system comprises at least one filter.

17. The gearbox according to claim 1, wherein the gearbox comprises at least one gearbox housing, wherein the fluid reservoir is at least partially integrated into the gearbox housing.

18. The gearbox according to claim 1, wherein the gearbox comprises at least one actuator.

19. The gearbox according to claim 18, wherein the actuator comprises at least one control output, wherein the gearbox is configured in such a way that the control output simultaneously controls the pump and the first fluid outflow.

20. A method for operating a gearbox, wherein the gearbox comprises at least one fluid supply system, wherein the fluid supply system comprises at least one pump, wherein the fluid supply system comprises at least one fluid sump, wherein the fluid supply system comprises at least one fluid reservoir, wherein the fluid reservoir comprises at least a first fluid outflow leading into the fluid sump, wherein the first fluid outflow is controlled as a function of a state variable.