air prefilter suction system for an internal combustion engine, internal combustion engine system, mechanical machine operating in a significantly contaminated environment and compact exhaust cooling system for an internal combustion engine

摘要

PREFILTER AIR EXTRACTION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE, INTERNAL COMBUSTION ENGINE SYSTEM, MECHANICAL MACHINE OPERATING IN A SIGNIFICANTLY LOADED ENVIRONMENT AND COMPACT INTERNAL EXHAUST COOLING SYSTEM. A diffuser for a mechanical machine having a fuel-efficient internal combustion engine that breathes air is described with an exhaust aftertreatment device which periodically raises exhaust temperatures to a high level. The diffuser has a venturi section and excess contaminants from an intake air prefilter are directed to the venturi choke to suck in and dispose of excess contaminants while cooling the exhaust flow. Additional openings in the divergent diffuser section assist in providing significant reductions in exhaust temperatures in a small axial envelope.