Air Filter System of a Motor Vehicle

• US 20100018400A1
• Filed: 07/23/2009
• Published: 01/28/2010
• Est. Priority Date: 07/25/2008
• Status: Active Grant

• Current Assignee: Mann+Hummel GmbH (Hummel Familien-Beteiligungsgesellschaft mbH + Co. KG)
• Original Assignee: Mann+Hummel GmbH (Hummel Familien-Beteiligungsgesellschaft mbH + Co. KG)
• Inventors: Dirnberger, Timo
• Granted Patent: US 8,241,413 B2
• Time in Patent Office: Days
• US Class Current: 96/422
• CPC Class Codes: F02M 35/02 Air cleaners
• CPC Class Codes: F02M 35/024 using filters, e.g. moistened F02M35/026 takes precedence; cleaning of the filtering material F02M35/08
• CPC Class Codes: F02M 35/10386 for flow rate air flow meters in air cleaners F02M35/021; circuit arrangements for generating control signals by measuring intake air flow F02D41/18

Abstract

An air filter system of a motor vehicle has an air filter housing with a housing part of a moisture-sensitive plastic material and an air passage section with a circumferentially extending passage wall, wherein the passage wall of the air passage section is integrally formed of identical material on the housing part of the air filter housing. A mass air flow sensor is arranged in the air passage section. A plastic insert of a moisture-insensitive plastic material is disposed on an inner side of the passage wall of the air passage section and lines the passage wall.

Claims

1. An air filter system of a motor vehicle, comprising:

an air filter housing comprising a housing part of a moisture-sensitive plastic material and an air passage section with a circumferentially extending passage wall, wherein said passage wall of said air passage section is integrally formed of identical material on said housing part of said air filter housing;

a mass air flow sensor arranged in said air passage section;

a plastic insert of a moisture-insensitive plastic material disposed on an inner side of said passage wall of said air passage section and lining said passage wall.

2. The air filter system according to claim 1, wherein said moisture-insensitive plastic material of said plastic insert is comprised at least predominantly of polybutylene terephthalate (PBT).

3. The air filter system according to claim 1, wherein said moisture-insensitive plastic material of said plastic insert is a fiberglass-reinforced polybutylene terephthalate.

4. The air filter system according to claim 3, wherein said moisture-insensitive plastic material is PBT GF30.

5. The air filter system according to claim 1, wherein said moisture-sensitive plastic material of said housing part is at least predominantly comprised of polyamide.

6. The air filter system according to claim 1, wherein said plastic insert is inserted into said air passage section.

7. The air filter system according to claim 6, wherein said plastic insert is locked in said air passage section.

8. The air filter system according to claim 1, further comprising an air guiding grid formed integrally with said plastic insert.

9. The air filter system according to claim 1, wherein said plastic insert is an injection-molded part.

10. The air filter system according to claim 1, wherein said mass air flow sensor is integrated into said plastic insert.

11. The air filter system according to claim 8, further comprising:

at least one locking nose formed onto an exterior portion of a circumferential wall of said plastic insert; and

at least one locking opening provided in said circumferentially extending passage wall;

wherein said locking noses are aligned and configured to be engageably lockable into said locking openings and operable to axially fix position said plastic insert in said air passage section.

wherein said air guiding grid extends axially along a first portion of an axial length of said plastic insert; and

wherein in a differing second portion of said plastic insert, said circumferential wall is provisioned such that said mass air flow sensor is extendable therethrough into an interior of said plastic insert.