Engine exhaust cooler and air pre-cleaner aspirator

摘要

A diffuser for a work machine (10) having an air breathing fuel consuming internal combustion engine (14) with an exhaust aftertreatment device (26) periodically elevating the exhaust temperatures to a high level. The diffuser (30) has a venturi section and the excess contaminants from an intake air pre-cleaner (36) are directed to the throat of the venturi to aspirate and dispose of excess contaminants while cooling the exhaust flow. Additional openings in the divergent section of the diffuser assist in providing significant reductions in exhaust temperatures within a short axial envelope.