Compact air cleaner assembly wth noise reduction device

An air cleaner assembly comprising:

• a filter element comprising a filter media for filtering a fluid and a first endcap positioned along a first end of the filter media and through which a first filtered air flow portion flows;
• and
• a housing assembly at least partially containing the filter element and comprising a cover that defines an inlet through which the first filtered air flow portion flows from the filter media and a first outlet through which the first filtered air flow portion flows to a downstream device, the cover comprising a noise reduction device that receives the first filtered air flow portion and dissipates sound waves traveling upstream from the downstream device, the noise reduction device comprising an inner wall and a side wall, the inlet extends through the inner wall and the first outlet extends through the side wall;
• wherein the noise reduction device defines at least one dead-end channel that comprises a dead end that cancels at least a part of the sound waves that enter into the noise reduction device;
• and wherein the noise reduction device defines a main flow passage that extends directly between the inlet of the cover and the first outlet, wherein the noise reduction device defines an expansion chamber that has a larger available flow area than the inlet of the cover and the first outlet and within which the sound waves can expand and dissipate, wherein the noise reduction device further defines a side channel that branches off of a middle portion of the main flow passage at a side channel inlet of the side channel and extends between the main flow passage and the expansion chamber, wherein the side channel and the expansion chamber share at least one common wall.

A housing assembly for at least partially containing a filter element for filtering a fluid, the housing assembly comprising:

• a cover that defines an inlet through which a first filtered air flow portion flows from a filter media and a first outlet through which the first filtered air flow portion flows to a first downstream device, the cover comprising a noise reduction device that receives the first filtered air flow portion and dissipates sound waves traveling upstream from the first downstream device, the noise reduction device comprising an inner wall, an outer wall spaced axially from the inner wall, and a side wall extending axially between the inner wall and the outer wall, the inlet extends axially through the inner wall and the first outlet extends radially through the side wall;
• and
• a housing body removably attachable to the cover and defining a second outlet through which a second filtered air flow portion flows to a second downstream device;
• wherein the noise reduction device defines at least one dead-end channel that comprises a dead end and cancels at least a part of the sound waves that enters into the noise reduction device.