Method for mounting an oil sump and arrangement of an oil sump on an assembly formed by a crankcase and a flywheel housing

Patent metadata

Field	Value
Publication number	US-9797282-B2
Application number	US-201514602367-A
Country	US
Kind code	B2
Filing date	Jan 22, 2015
Priority date	Feb 26, 2014
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

An oil sump is mounted on an assembly formed by a crankcase and a flywheel housing of an internal combustion engine. The flywheel housing has a first parting plane to the crankcase and to the oil sump. In mounted state, the joint faces of the flywheel housing, the crankcase, and the oil sump lie on each other. The crankcase has a second parting plane to the oil sump. In mounted state the joint faces of the crankcase and the oil sump lie on each other. At least one guide is provided between the flywheel housing and the oil sump, the guide orienting at least the joint faces of the oil sump and the crankcase relative to each other during connection of the oil sump to the assembly formed by the crankcase and flywheel housing, such that on creation of the abutment connection between the oil sump and the crankcase, these joint faces are oriented substantially planar parallel.

First claim

The invention claimed is:

1. A method for mounting an oil sump on an assembly formed by a crankcase and a flywheel housing of an internal combustion engine, wherein the flywheel housing has a joint face that forms a first parting plane with a first joint face of the crankcase and a first joint face of the oil sump, the joint face of the flywheel housing forming the first parting plane lies directly or indirectly on the first joint face of the crankcase and the first joint face of the oil sump in an abutment connection in the mounted state, and wherein the crankcase has a second joint face that forms a second parting plane with a second joint face of the oil sump, the second joint face of the crankcase and the second joint face of the oil sump forming the second parting plane lie on each other directly or indirectly in an abutment connection in the mounted state, the method comprising the steps of:
joining the crankcase and the flywheel housing to form the assembly;
attaching the oil sump on the assembly;
providing at least one guide between the joint face of the flywheel housing and the first joint face of the oil sump, the at least one guide orienting at least the second joint face of the oil sump and the second joint face of the crankcase relative to each other during the step of attaching the oil sump to the assembly, such that the second joint face of the oil sump and the second joint face of the crankcase are oriented substantially planar parallel during mounting on creation of an abutment connection between the oil sump and the crankcase,
wherein the at least one guide is disposed on the joint face of the flywheel housing and on the first joint face of the oil sump.

2. The method according to claim 1 , wherein the step of attaching the oil sump on the assembly includes a final oil sump mounting substep in which the oil sump is moved along the first parting plane in the direction of the crankcase in the mounting and application direction (z), wherein at least one guide element of the at least one guide prevents at least one of twisting about and tilting relative to an oil sump axis running transversely to the mounting and application direction.

3. The method according to claim 2 , wherein the at least one guide element used in said step of attaching comprises at least one linear guide element allowing only a linear movement of the oil sump in the mounting and application direction.

4. The method according to claim 3 , wherein the first parting plane between the flywheel housing, the crankcase and the oil sump is oriented substantially perpendicular to the second parting plane between the crankcase and the oil sump.

5. The method according to claim 2 , wherein the first parting plane between the flywheel housing, the crankcase and the oil sump is oriented substantially perpendicular to the second parting plane between the crankcase and the oil sump.

6. The method according to claim 1 , wherein the step of attaching the oil sump includes a first oil sump mounting step in which the oil sump and the flywheel housing are joined together by the at least one guide, such that the first joint face of the oil sump and joint face the flywheel housing come to lie on each other directly or indirectly in the first parting plane, and a movement of the oil sump relative to the flywheel housing is still allowed, so that in a final oil sump mounting step, the oil sump is moved along the first parting plane in the direction of the crankcase, guided by the at least one guide.

7. The method according to claim 1 , wherein the at least one guide is formed by at least one pin-slot connection between the flywheel housing and the oil sump, in which a pin cooperates with a slot which is substantially adapted to the pin in form or contour, and the step of attaching includes inserting the pin into the slot.

8. The method according to claim 7 , wherein the pin is a bolt, and the step of attaching includes initially tightening at least one bolt connection with a predefined tightening torque in order to position the oil sump relative to the flywheel housing and the crankcase, then transferring the oil sump to the final mounting position, and tightening the at least one bolt connection to a final torque after the oil sump has reached a final mounting position.

9. The method according to claim 7 , wherein the guide further comprises at least one feed-in device, the step of attaching including guiding the oil sump with the feed-in device before insertion of the at least one guide pin of at least one pin-slot connection, with a feed-in groove on one of the first joint face of the oil sump and joint face the flywheel housing and a guide pin on the other of the first joint face of the oil sump and joint face the flywheel housing.

10. The method according to claim 9 , wherein the feed-in groove is oriented at least one of parallel to the mounting and application direction of the oil sump and perpendicular to the first parting plane between the crankcase and the oil sump.

11. The method according to claim 9 , wherein a function part protrudes from one of the oil sump and the crankcase over the second parting plane and can be introduced in a corresponding receiver of the crankcase and the oil sump, the method comprises positioning the guide pin on the flywheel housing or the oil sump so that the guide pin first engages in the feed-in groove before the function part comes into contact with the receiver during the step of attaching.

12. The method according to claim 1 , wherein the at least one guide is formed by at least one pin-groove connection between the flywheel housing and the oil sump, the step of attaching further comprising attaching at least one bolt connection by inserting a bolt through a slot in the flywheel housing and into a threaded hole in the oil sump, and transferring the oil sump to the final mounting position guided by the at least one guide and the at least one bolt connection.

13. The method according to claim 8 , wherein the at least one pin-slot connection includes at least three pin-slot connections, the three pin-slot connections arranged in a triangular three point mounting that prevents tilting and twisting of the oil sump relative to the flywheel housing during mounting.

Assignees

• Man Truck & Bus Ag

Inventors

• Fedotov Sergiy

Classifications

• Y10T29/49231

  I.C. [internal combustion] engine making · CPC title

• F02F7/0082

  Mounting of engine casings · CPC title

• F02F7/0073

  Adaptations for fitting the engine, e.g. front-plates or bell-housings · CPC title

• F02F7/0046

  Shape of casings adapted to facilitate fitting or dismantling of engine parts · CPC title

• F02B2075/025

  two · CPC title