Low intake restriction air precleaner

摘要

An air precleaner includes a base assembly, a hood mounted to the base assembly and spaced from the base assembly to define a circumferential gap, and a rotor assembly mounted for rotation within the air space between the hood and base assembly. The base assembly has an outlet port that is connectable to an engine intake. Inlet ports may be formed between web supports connecting an outer circumferential wall to an inner circumferential wall of the base assembly. A series of vanes are mounted in the gap between the hood and base assembly at an angle between radial and tangential to define channels between them through which air is directed into the air space between the hood and base assembly with both an inward and tangential component of velocity. The air drawn in through the channels between the vanes provides a strong tangential component of air velocity impacting upon the rotor to maintain high efficiency of particulate removal. The additional air drawn in through the channels at the gap between the hood and base assembly significantly reduces the restriction of air drawn in through the precleaner as compared to conventional precleaner designs in which air enters only through inlet ports formed at the bottom of the precleaner. The bottom of the air precleaner may be closed so that intake air enters the precleaner only through the channels around the periphery of the precleaner, allowing the precleaner to be mounted on or adjacent to other surfaces.