Intake system for an internal combustion engine with a membrane preferentially permeable to oxygen molecules
AssigneeFilterwerk Mann & Hummel GmbH
InventorOlaf Weber
Life of this patent
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Abstract
An intake system (13) for an internal combustion engine (12) which includes a housing (15a) with a filter insert (16) and a membrane (22) for separating nitrogen and enriching the combustion air with oxygen. The membrane is integrated into the filter housing so as to save construction space and provide a lower cost system. The membrane (22) can alternatively be arranged on the clean air side of the air filter insert (16) to prevent the membrane from being soiled and to improve the functional reliability of the oxygen enrichment. Alternatively, instead of arranging the membrane (22) on the clean side of the filter insert (16), the membrane can be protected from being soiled by using a cover (23).
Claims11
An intake system for an internal combustion engine, comprising:
- an intake passage that connects an intake opening with at least one cylinder inlet of the internal combustion engine;
- an air filter housing arranged as part of said intake passage;
- a filter insert arranged in said air filter housing such that a flow of air drawn through said intake passage will pass through said filter insert;
- and
- a membrane preferentially permeable to oxygen molecules, said membrane being arranged in said intake passage such that a flow of air drawn through said intake passage will pass through said membrane;
- wherein said membrane is integrated into the air filter housing and forms part of an exterior wall of said air filter housing.
An intake system for an internal combustion engine, comprising:
- an intake passage that connects an intake opening with at least one cylinder inlet of the internal combustion engine;
- an air filter housing arranged as part of said intake passage;
- a filter insert arranged in said air filter housing such that a flow of air drawn through said intake passage will pass through said filter insert;
- and
- a membrane preferentially permeable to oxygen molecules, said membrane being arranged in said intake passage such that a flow of air drawn through said intake passage will pass through said membrane;
- wherein said membrane is integrated into the air filter housing and forms part of a wall of said air filter housing;
- and
- wherein at least part of said intake passage is comprised of an intake manifold formed in one piece with said air filter housing.
Dependencies are inferred from the claim text.