Induction system, especially for use as an induction port of an internal combustion engine
AssigneeFilterwerk Mann & Hummel GmbH
InventorHelmut Spannbauer
Life of this patent
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Abstract
An intake assembly with an optimal noise level, especially an intake duct for use as the manifold of an internal combustion engine. The noise level is optimized by introducing shunt resonators (16, 18) in collecting manifold of the intake duct, which is produced using a multi-shell technique. The inserted structures (16, 18) can be adhered or welded before the shells are joined, or they can be inserted in a preexisting duct formed of previously joined half shells. The shunt resonators (16, 18) require little space and can also be used for subsequently optimizing the intake ducts in the test phase, if the initial test results are acoustically unsatisfactory.
Claims16
An air intake assembly comprising:
- an air intake duct for an internal combustion engine, said intake duct comprising an inlet, at least one outlet, and having cavity-forming inner walls defining a duct geometry, and
- at least one internal structure arranged inside said air intake duct, wherein said internal structure can be introduced into a preexisting intake duct while at least substantially retaining the duct geometry, said internal structure being attached to the cavity-forming inner walls and in cooperation with said inner walls enveloping at least one resonator chamber, and said at least one resonator chamber having at least one opening communicating between said resonator chamber and said air intake duct.
Dependencies are inferred from the claim text.