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| Cat D6T, D7E and D8T track-type tractors  New D6T, D7E and D8T models from Caterpillar build on the solid, 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 aftertreatment solutions to meet US Environmental Protection Agency 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.ACERT Technology blends an innovative intake-air-management system, using optimized turbocharging, with electronically controlled fuel-injection that precisely shapes each combustion cycle through multiple-injection fuel delivery. This meticulous control of combustion parameters yields extremely clean combustion, steady power in all operating conditions and outstanding fuel efficiency. 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 aftertreatment unit, includes a Diesel Oxidation Catalyst (DOC) and a Diesel Particulate Filter (DPF) to remove particulate matter from the exhaust stream. Also included is the Cat Regeneration System (CRS) – a process that removes soot from the Diesel Particulate Filter (DPF.) Under most operating conditions, engine exhaust is hot enough to oxidize soot through a passive regeneration process. However, if conditions are such that supplemental regeneration is needed, the CRS elevates exhaust gas temperatures to oxidize soot within the DPF. The Cat Regeneration System is designed to work transparently, operating automatically without any interaction needed from the operator and regenerating when conditions are optimal. The D6T, D7E and D8T each offer optional Key Off Regeneration, as well as a delayed engine shutdown timer and an engine idle shutdown timer. For high debris applications that require thermal shields on exhaust components, an optional insulated CEM will be available in mid-2011. All three models also offer Cat Product Link, which allows remote monitoring of equipment to improve overall fleet-management effectiveness. Product Link is integrated into machine systems. Events and diagnostic codes, as well as hours, fuel, idle time and other detailed information are transmitted to a secure web-based application, VisionLink. VisionLink includes powerful tools to convey information to users and dealers, including mapping, working and idle time, fuel level and more. The Cat D6T is engineered for day-in/day-out demanding work. Standard electro-hydraulic controls improve precision and response and facilitate installation of the Cat AccuGrade machine control and guidance system, which saves fuel and time by helping operators attain specified grades in fewer passes. The Cat D7E remains the most innovative track-type-tractor available, featuring a diesel/electric drive system for unprecedented efficiency and productivity. D7E users are experiencing superior reliability and fuel efficiency on their own jobsites—often even better than the 10 to 30 percent fuel advantage over the D7RII as measured in production studies. The new D8T builds on a reputation of exceptional quality and performance, retaining such premium features as differential steering for infinitely variable turning control with full power to both tracks and a suspended undercarriage for optimum traction in uneven terrain. Additional new performance-enhancing, cost-reducing features, include an Enhanced Auto-Shift system that can reduce fuel consumption as much as 6 percent in certain applications. write your comments about the article :: © 2011 Construction News :: home page |