OILING DEVICE, GEARBOX AND A METHOD TO LUBRICATE A GEARBOX

• US 20100018807A1
• Filed: 10/18/2007
• Published: 01/28/2010
• Est. Priority Date: 10/25/2006
• Status: Abandoned Application

• Current Assignee: Scania CV AB (Volkswagen AG)
• Original Assignee: Scania CV AB (Volkswagen AG)
• Inventors: Grenfeldt, Johan, Hagberg, Kenneth
• Application Number:
  US12/444,606
• Publication Number:
  US 20100018807A1
• Time in Patent Office: Days
• US Class Current: 184/6.120
• CPC Class Codes: F16H 57/0456 Lubrication by injection; Injection nozzles or tubes therefor oil mist or spray lubrication F16H57/0458
• CPC Class Codes: F16H 57/0493 Gearings with spur or bevel gears differentials with spur or bevel gears F16H57/0483
• CPC Class Codes: F16H 57/0494 with variable gear ratio or for reversing rotary motion

Abstract

A lubrication device for a gearbox during operation with a plurality of gearwheel pairs in constant engagement. The lubrication device has a plurality of respective nozzles for oil supply from an oil pump to the gearwheel pairs by means of a pump from an oil source. To save pump power, a controllable valve, which adjusts the oil supply to the gearwheel pairs in accordance with a varying load upon the various mutually engaging gearwheels, is provided for each nozzle.

Claims

1. A lubrication device for a gearbox, wherein the gearbox includes a plurality of gearwheel pairs each selectively placeable either in engagement under load or not under load and includes devices for selectively placing the gearwheel pairs under load;

the lubrication device comprising

an oil pump operable to pump oil from an oil source to the mutually engaging gearwheel pairs in the gearbox;

a respective oil supply nozzle connected to the oil pump and directed for local oil supply from the oil pump to each of the gearwheel pairs;

a controllable valve provided for each nozzle and operable to adjust the oil supply individually to the respective gearwheel pair for that nozzle according to the load on the gearwheel pair.

2. A lubrication device according to claim 1, further comprising a control unit for controlling the valves to adjust the oil supply during gearchanging in the gearbox and to control the supply of oil to each gearwheel pair according to the load on the pair.

3. A lubrication device according to claim 2, wherein the control unit comprises an electronic control unit operable on the valves.

4. A lubrication device according to claim 2, wherein the control unit comprises a mechanical control unit operable to mechanically control the valves according to the load on the gearwheel pairs.

5. A gearbox including a plurality of respective gearwheel pairs that are each selectively placeable under load, a device which is operable to selectively place the gearwheel pairs under load and a lubrication device according to claim 2.

11. A gearbox including a plurality of respective gearwheel pairs that are each selectively placeable under load, a device which is operable to selectively place the gearwheel pairs under load and a lubrication device according to claim 1.

6. A method of lubricating a gearbox during operation of gearwheel pairs in the gearbox, while the gearwheel pairs are selectively under load and during gearchanging which changes the gearwheel pairs that are under load;

the method, comprising locally supplying oil to mutually engaging gearwheel pairs in the gearbox, and individually adjusting the oil supply to each of the gearwheel pairs according to the load thereon.

7. A method according to claim 6, comprising adjusting the oil supply so that only the gearwheel pairs which at the time are loaded by driving engagement receive oil supply.

8. A method according to claim 6, further comprising identifying loaded gearwheel pairs by detecting a respective gear position in the gearbox and individually adjusting the oil supply according to the load identified.

9. A method according to claim 6, comprising effecting the adjustment via an electronic control unit for the oil supply.

10. A method according to claim 6, comprising effecting the adjustment by setting a gear position in the gearbox.