The appearance of advertisements and product information on this site does not constitute an endorsement by Equipment World Magazine, and Equipment World Magazine has not investigated the claims made by any advertiser. Product information is based solely on material received from suppliers.
Cummins Inc.’s 4-cylinder QSB3.3 and QSB4.5 engines offer a simplified Tier 4 installation across a broad 75- to 160-hp (56-119 kW) power range. With an air-intake-to-exhaust aftertreatment system specifically designed for highly flexible machine integration, the 3.3-liter and 4.5-liter QSB engines operate as integrated Tier 4 emissions systems with Cummins Compact Catalyst exhaust aftertreatment. Introduced for EPA Tier 4 Interim and EU Stage IIIB off-highway applications, the catalyst removes particulate matter (PM) by simple, flow through passive oxidation. With a smaller size than other types of aftertreatment, the Cummins Compact Catalyst can be installed in space-constrained equipment with the added flexibility of mounting separately from the exhaust muffler, or as part of a combined catalyst-and-muffler unit.