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US 10,441,910 B2Granted
Air filter assemblies and carrier frames having vortex-generating flow guide
AssigneeCummins Filtration IP, Inc.
InventorsPeter K. Herman, Scott W. Schwartz
Life of this patent
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Abstract
Air filter assemblies and carrier frames have a plurality of vortex-generating flow guides normalizing air flow to a uniform velocity profile downstream thereof. The airflow having the uniform velocity profile travels across a mass airflow sensor.
Claims20
An air filter assembly comprising:
- an air filter element that filters an airflow from an upstream inlet to a downstream outlet and filters air flowing therethrough from upstream to downstream;
- a carrier frame carrying the air filter element;
- a plurality of vortex-generating flow guides at the outlet, the plurality of vortex-generating flow guides normalizing airflow to a uniform velocity profile downstream thereof;
- a grid upon which the pluralitv of vortex-generating flow guides are postioned, all of the air flowing through the grid first flows through the air filter element;
- and
- a mass airflow sensor (MAF) across which the airflow having the uniform velocity profile travels.
3 more elements
An air filter assembly comprising:
- an air filter element that filters an airflow from an upstream inlet to a downstream outlet and filters air flowing therethrough from upstream to downstream;
- a carrier frame supporting the air filter element, the carrier frame comprising:
- an exit side positioned downstream and adjacent the downstream outlet;
- and
- a plurality of vortex-generating flow guides mounted on the exit side, the plurality of vortex-generating flow guides comprising:
- a plurality of spaced-apart cross-ribs;
- a radially staggered array of pairs of tilted trapezoidal tabs mounted on the plurality of spaced-apart cross-ribs, each of the pairs of tilted trapezoidal tabs comprising:
- a first upstream edge having a first end and a second end and a second upstream edge having a third end and a fourth end mounted on a cross-rib, the first upstream edge extending along a first length of the cross-rib and the second upstream edge extending along the first length of the cross-rib such that the first end of the first upstream edge is aligned with the third end of the second upstream edge and the second end of the first upstream edge is aligned with the fourth end of the second upstream edge, and
- a first downstream edge and a second downstream edge positioned downstream from the cross-rib, the first downstream edge spaced apart from the second downstream edge;
- and
- a grid upon which the plurality of vortex-generating flow guides are positioned, all of the air flowing through the grid first flows through the air filter element,
- wherein the plurality of vortex-generating flow guides promotes rapid mixing of clean air downstream of the air filter element and normalizes a uniform velocity profile downstream thereof such that mass airflow variation is minimized for flow to a mass airflow sensor positioned downstream of the plurality of vortex-generating flow guides.
9 more elements
Dependencies are inferred from the claim text.