Air intake plenum for air induction channel

An air intake plenum disposed in an air induction channel in a hood defined by a bottom channel wall, a rear hood reinforcement wall, a cab wall, and an exterior skin, the air induction channel extending between an air inlet laying in a plane generally parallel with the direction of travel of the vehicle to an air outlet, the plenum comprising:

• a front surface defining a plenum inlet that is generally co-planar with the air inlet of the air induction channel, wherein the air intake plenum and the air induction channel generally lay in the same plane substantially over the length of the induction channel;
• a rear surface defining a plenum outlet;
• an upper wall extending from the front surface to the rear surface, wherein from the front surface to the rear surface, the upper wall slopes downwards towards the bottom channel wall;
• a lower wall extending from the front surface to the rear surface, wherein in the direction from the front surface to the rear surface, the lower wall slopes downwards towards the bottom channel wall;
• wherein air through the plenum inlet impinges against at least one of the upper wall and the lower wall, and the air exits the plenum outlet wherein the air intake plenum is configured to direct the air downward to impinge against the bottom channel wall of the air induction channel where contaminants drop out of the air.

An air intake plenum disposed in an air induction channel in a hood defined by a bottom channel wall, a rear hood reinforcement wall, a cab wall, and an exterior skin, the air induction channel extending between an air inlet laying in a plane generally parallel with the direction of travel of the vehicle to an air outlet, the plenum comprising:

• a front surface defining a plenum inlet that is generally co-planar with the air inlet of the air induction channel, the front surface having a plurality of fastener receivers that are disposed generally in the plane of the plenum inlet, wherein the air intake plenum and the air induction channel generally lay in the same plane substantially over the length of the induction channel;
• a rear surface defining a plenum outlet;
• an upper wall extending from the front surface to the rear surface, wherein in the direction from the front surface to the rear surface, the upper slopes downwards towards the bottom channel wall;
• a lower wall extending from the front surface to the rear surface, wherein in the direction from the front surface to the rear surface, the lower wall slopes downwards towards the bottom channel wall;
• a first side wall having a first radius of curvature extending from the front surface to the rear surface;
• a second side wall having a second radius of curvature extending from the front surface to the rear surface, wherein the second radius of curvature is larger than the first radius of curvature wherein the second side wall is a trailing surface of the plenum in the direction of travel;
• wherein air through the plenum inlet impinges against at least one of the upper wall and second side wall, and exits the plenum outlet, wherein the air intake plenum is configured to direct the air exiting the air intake plenum downward to impinge against the bottom channel wall of the air induction channel where contaminants drop out of the air.