# US 2014/0197634 A1 · Device for the sealed connection of communicating ducts in adjoining and/or connected components of an internal combustion engine

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- Number: US 2014/0197634 A1
- Document ID: US20140197634A1
- Status: Published application
- Kind: A1
- Application number: 14/155,750
- Filed: 2014-01-15
- Published: 2014-07-17
- Earliest claimed: 2013-01-15
- Assignees: Man Truck & Bus AG
- Applicants: MAN Truck & Bus AG
- Inventors: Sergiy FEDOTOV
- Web page: https://patentgrep.com/patent/US20140197634A1

## CPC

- F02F 11/00: Arrangements of sealings in combustion engines {(piston rings or ring sealings of similar construction F16J9/00)}
- F01M 11/00: Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M 11/0004: {Oilsumps}
- F01M 2011/0066: {with passages in the wall, e.g. for axles or fluid passages}
- F01M 2011/023: {between oil sump and cylinder head}
- F02F: CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F01M: LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING

## Abstract

A device for the sealed connection of communicating ducts in adjoining components or an internal combustion engine includes a connecting pipe inserted into the ducts and which has a pipe portion which projects into a first component. A sealing ring is disposed between the pipe portion and an associated duct wall of the first component. The connecting pipe furthermore has an annular collar accommodated in a duct-side recess of the second component, wherein an axially sealing second sealing ring is arranged between a face-side portion of the annular collar and a wall region of a duct-side recess, the annular collar accommodated in the recess with a radial circumferential gap.

## Claims

### Claim 1

A device for a sealed connection of a first duct in a first component and a second duct in a second component, the first component and the second component are adjoining components of an internal combustion engine, wherein the second component includes a duct-side recess, the device comprising:
a connecting pipe having a pipe portion inserted into the duct of the first component and an annular collar, wherein the annular collar is accommodated in the duct-side recess of the second component;
a radially sealing first sealing ring disposed between the pipe portion and a duct wall of the duct of the first component;
an axially sealing second sealing ring disposed between an axially-facing face-side portion of the annular collar and a wall region of duct-side recess,
wherein the annular collar is accommodated in the duct-side recess with a radial circumferential gap, whereby tolerance corrections are allowed compensating manufacturing tolerances without impairing a sealing action of the axially sealing second sealing ring.

### Claim 2 (depends on 1)

The device according to claim 1, wherein the face-side portion of the annular collar includes an annular groove into which the second sealing ring is inserted.

### Claim 3 (depends on 1)

The device according to claim 1, wherein on the face-side portion of the annular collar includes a projection which runs around thereon at least in sections, the second sealing ring being held on the face-side portion by the projection.

### Claim 4 (depends on 3)

The device according to claim 3, wherein the projection one of is formed on the inner edge region of the face-side portion of the annular collar and, by way of an inner circumference, forms a constituent part of a pipe wall of the connecting pipe.

### Claim 5 (depends on 3)

The device according to claim 3, wherein the projection has an outer circumference that tapers conically toward the annular collar.

### Claim 6 (depends on 1)

The device according to claim 1, wherein the radially acting first sealing ring is arranged in a duct-wall-side annular groove of the first duct.

### Claim 7 (depends on 1)

The device according to claim 1, wherein the duct-side recess is formed by a widening with step-shaped cross section, in a mouth region of the second duct.

### Claim 8 (depends on 1)

The device according to claim 1, wherein the first component is a crankcase of the internal combustion engine, and the second component is one of an oil sump, a lower crankcase bearing part, and a cylinder head of the internal combustion engine.

### Claim 9 (depends on 1)

The device according to claim 1, wherein the ducts which receive the connecting pipe are one of oil suction ducts and oil return ducts of a lubricating oil system of the internal combustion engine.

### Claim 10 (depends on 1)

A vehicle, in particular utility vehicle, having a device, a first component, and a second component according to claim 1.