Cyclonic air filter assembly for an engine

An air filter assembly configured to provide filtered air to an engine, comprising:

• a housing comprising a cover and a base, wherein the cover and the base define an interior volume of the housing;
• a filter element positioned within the interior volume and comprising filter media, the filter element divides the interior volume into a filtered volume and an unfiltered volume;
• an air intake formed in the base and configured to allow air to flow into the housing;
• a debris outlet formed in the base and configured to allow debris and air to exit the housing;
• a filtered air outlet formed in the base, wherein the filtered air outlet is fluidly coupled to an air-fuel mixing device to allow filtered air to exit the housing and enter the air-fuel mixing device;
• a gap between the filter element and the housing configured to allow air to flow between the filter element and the housing;
• and
• a plurality of ribs formed in the cover and the base configured to direct air to complete at least two cyclonic filtering passes within the gap before being filtered by the filter element.

An internal combustion engine, comprising:

• an engine block including a cylinder;
• an air-fuel mixing device configured to provide an air-fuel mixture to the cylinder;
• an air filter assembly configured to provide filtered air to the air-fuel mixing device, comprising:
• a housing comprising a base and a cover, the cover is configured to releasably fasten to the base, the housing defining a first housing end portion and a second housing end portion, wherein the base and the cover define an interior volume;
• a filter element positioned within the interior volume, the filter element divides the interior volume into a filtered volume and an unfiltered volume;
• an outlet passage formed in the base fluidly coupling a filtered air outlet to a final air outlet, the filtered air outlet in fluid communication with the filtered volume of the filter element;
• an air intake formed in the housing at the first housing end portion and configured to allow air to flow into a gap between the filter element and the housing, wherein the gap is configured to direct air in a first airflow pass in a direction from the first housing end portion toward the second housing end portion before being filtered by the filter element;
• wherein the filter element is configured to direct filtered air in a second airflow pass in a substantially opposite direction from the first airflow pass;
• and
• wherein the outlet passage is configured to direct filtered air into a third airflow pass in a substantially same direction as the first airflow pass.