New D6T, D7E and D8T models from Caterpillar build on the proven designs of their predecessors with new features that increase fuel-efficiency and productivity while reducing operating costs. All three models feature Cat engine and after-treatment solutions to meet EPA Tier 4 Interim emissions standards.
The D6T and D7E use the Cat C9.3 ACERT engine and the D8T uses the Cat C15 ACERT engine, having net horsepower ratings of 205, 235 and 310 respectively. These engines utilize the building blocks of ACERT Technology, including the Cat NOx Reduction System and Cat Clean Emissions Module (CEM), to meet Tier 4 Interim emissions standards. The Cat NOx-Reduction System continually diverts and cools a small volume of the engine exhaust gases and then returns the cooled gases to the combustion chamber. This process reduces cylinder temperatures and, consequently, lowers NOx formation. The CEM, a compactly packaged after-treatment unit, includes a Diesel Oxidation Catalyst and a Diesel Particulate Filter to remove particulate matter from the exhaust stream. www.cat.com