Fresh air system

Patent metadata

Field	Value
Publication number	US-9909542-B2
Application number	US-201414910679-A
Country	US
Kind code	B2
Filing date	Jul 29, 2014
Priority date	Aug 7, 2013
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

A fresh air system for an internal combustion engine may include an inlet section, an air filter and a connecting section fluidly connecting the inlet section to the air filter. The air filter may include a filter element arranged in a filter housing, and a housing cover closing the filter housing and configured to be removable from the filter housing to change the filter element. The connecting section may be movably connected to the inlet section on an inlet side and detachably connected to the housing cover on an outlet side. To change the filter element when the inlet section is connected to the connecting section, the connecting section may be detachable from the housing cover and adjustable relative to the filter housing to such an extent that the housing cover can be removed from the filter housing.

First claim

The invention claimed is:

1. A fresh air system for an internal combustion engine, comprising:
an inlet section configured to fixedly connect to a periphery of an engine component,
an air filter including a filter element arranged in a filter housing, the filter housing configured to fixedly connect to the periphery of the engine component, and a housing cover coupled to the filter housing for closing the filter housing, wherein the housing cover is removable from the filter housing to change the filter element,
a connecting section defining at least part of a fluid connection of the inlet section to the air filter, wherein the connecting section is movably connected to the inlet section on an inlet side and is detachably connected to the housing cover on an outlet side,
at least one positioning element disposed on the connecting section, the at least one positioning element interacting with at least one complementary contour positioning element disposed on the housing cover to position or align the connecting section relative to the housing cover,
wherein, to change the filter element when the inlet section is connected to the connecting section, the connecting section is detachable from the housing cover and adjustable relative to the filter housing to such an extent that the housing cover can be removed from the filter housing, and
wherein the connecting section is movably connected to the inlet section around a pivot axis to produce a rotary movement for the connecting section about the pivot axis.

2. The fresh air system according to claim 1 , wherein the inlet section is connected to the connecting section via a plug-in connection, the plug-in connection including an inner part inserted axially into an outer part, wherein a radial gap is formed between the inner part and the outer part, and wherein an elastic compensating body is arranged in the radial gap and extending in a circumferential direction about a longitudinal axis of the plug-in connection.

3. The fresh air system according to claim 2 , wherein the compensating body is a foam body.

4. The fresh air system according to claim 2 , wherein the plug-in connection has an axial overlap between the inner part and the outer part that is at least as large as a diameter of the inner part.

5. The fresh air system according to claim 2 , wherein the compensating body projects axially over the plug-in connection.

6. The fresh air system according to claim 2 , wherein the plug-in connection defines a flat cross section having a long diameter and, transversely thereto, a comparatively short diameter.

7. The fresh air system according to claim 1 , wherein the connecting section is fixable to the housing cover via a locking connection, and wherein the locking connection has an assembly direction.

8. The fresh air system according to claim 7 , wherein the plug-in connection defines a flat cross section having a long diameter and a comparatively short diameter extending transversely thereto, and wherein the assembly direction runs substantially perpendicular to the long diameter of the cross section of the plug-in connection.

9. The fresh air system according to claim 1 , wherein the connecting section includes a first flat cross section on the inlet section and a second flat cross section on the housing cover, wherein the second flat cross section is rotated approximately 90° in relation to the first flat cross section.

10. The fresh air system according to claim 1 , wherein the connecting section is connected to the housing cover via a locking connection, and wherein the locking connection has at least one manually operated releasing element for unlocking the locking connection.

11. The fresh air system according to claim 1 , wherein the at least one positioning element and the at least one counter positioning element is wedge-shaped or ramp-shaped and drives the connecting section against the housing cover in an axial direction along a longitudinal centre axis of the connection between the connection section and the housing cover when the connecting section is mounted on the housing cover.

12. The fresh air system according to claim 1 , wherein the connecting section is composed of two shell bodies each formed in one piece as injection-moulded parts.

13. The fresh air system according to claim 1 , further comprising a resonator arranged on the connecting section.

14. The fresh air system according to claim 13 , wherein the resonator has a resonator housing arranged integrally on the connecting section, and a separate resonator cover secured to the resonator housing.

15. The fresh air system according to claim 2 , wherein the connecting section includes a first flat cross section on the inlet section and a second flat cross section on the housing cover, wherein the second flat cross section is rotated approximately 90° in relation to the first flat cross section.

16. The fresh air system according to claim 2 , wherein the connecting section is connected to the housing cover via a locking connection, and wherein the locking connection includes at least one releasing element for unlocking the locking connection.

17. The fresh air system according to claim 2 , wherein the connecting section is securable to the housing cover via a locking connection.

18. The fresh air system according to claim 3 , wherein the foam body projects axially over the plug-in connection.

19. A fresh air system of an internal combustion engine, comprising:
an inlet section fixedly connected to a periphery of an engine component;
an air filter including a filter housing, a filter element arranged in the filter housing, and a housing cover closing the filter housing, wherein the housing cover is removable from the filter housing and the filter housing is fixedly connected to the periphery of the engine component;
a connecting section fluidly connecting the inlet section to the air filter, wherein the connecting section is movably connected to the inlet section on an inlet side and is detachably connected to the housing cover on an outlet side;
a plug-in connection connecting the inlet section to the connecting section, the plug-in connection including an inner part axially inserted into an outer part, a radial gap disposed between the inner part and the outer part, and an elastic compensating body arranged in the radial gap extending along a circumferential direction about a longitudinal axis of the plug-in connection; and
a locking connection connecting the connecting section to the housing cover;
wherein, to remove the housing cover when the inlet section is connected to the connecting section, the connecting section is detachable from the housing cover and adjustable relative to the filter housing an extent facilitating removal of the housing cover from the filter housing; and
wherein the connecting section is movably connected to the inlet section around a pivot axis to produce a rotary movement for the connecting section about the pivot axis.

Assignees

• Mahle Int Gmbh

Inventors

• Rother Thilo

Classifications

• F02M35/1255

  using resonance · CPC title

• F02M35/10144

  Connections of intake ducts to each other or to another device · CPC title

• F02M35/10091

  characterised by details of intake ducts: shapes; connections; arrangements (ducts within or on the plenum chamber F02M35/10039) · CPC title

• F02M35/0203 Primary

  by using clamps, catches, locks or the like, e.g. for disposable plug-in filter cartridges · CPC title

• F02M35/024

  using filters, e.g. moistened (F02M35/026 takes precedence; cleaning of the filtering material F02M35/08) · CPC title