Engineering & Mining Journal

JUL 2014

Engineering and Mining Journal - Whether the market is copper, gold, nickel, iron ore, lead/zinc, PGM, diamonds or other commodities, E&MJ takes the lead in projecting trends, following development and reporting on the most efficient operating pr

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40 E&MJ; • JULY 2014 www.e-mj.com D I E S E L E N G I N E S requires no additional service intervals for cleaning. The Cat DPF is constructed with a sin- tered metal fleece and a corrugated mixing foil. The chemistry of the metal fleece was specifically developed to reduce PM output and to control NO x , as well as to enhance regeneration of the exhaust particulates. For correct DPF operation, Ultra Low Sul- phur Diesel (ULSD) and low-ash engine oil (CJ-4) is required. Komatsu Goes 'Fluid Neutral' with SCR Komatsu announced in January the immi- nent start of production on its Tier 4 Final engines ranging in size from 3.3 to 46 liters. It said it had achieved compliance with Tier 4 final standards by employing an integrated combination of next-genera- tion high-pressure common rail fuel in- jection (HPCR), high-efficiency EGR, VGT and DPF. Komatsu also said it had introduced a newly designed, proprietary SCR device to provide high passive regeneration capabili- ty for its DPF with minimal impact on machine operation and production. With the addition of the SCR system, a stringent design target of "fluid neutral" or better was established. In a "fluid neutral" situation, the volume of fuel burned plus the volume of AdBlue/DEF consumed is equal to or less than the total volume of fuel burned in the previous-generation machine. This achievement lowers operat- ing costs for the customer as AdBlue/DEF typically costs less than diesel. MTU's Big Mining Diesels Avoid Aftertreatment Earlier this year at the ConExpo trade show in Las Vegas, the MTU engine group of Rolls Royce Power Systems (formerly Tognum AG) displayed a selection of Tier 4- compliant engines, highlighting its Series 1500, an in-line 6-cylinder engine with SCR, designed for ease of installation by OEMs, according to the company. The Series 1500 offers power ratings from 400 kW to 460 kW (536 bhp to 617 bhp). Also on display was the Series 1000, rated from 100 to 260 kW (134 to 349 bhp) with SCR; Series 1300, rated from 320 to 390 kW (429 to 523 bhp); and Series 1600, rated 567 up to 730 kW (760 up to 979 bhp). The company noted that its Series 2000 and 4000 diesels, designed for heavy-duty mining applications, will be Tier 4 Final-compliant without the use of exhaust aftertreatment, a first for the min- ing and construction industries. MTU also displayed the all-new MTU Power Drive Unit, used for providing mechanical power to equipment such as pumps, drills and many other types of industrial machines. The new Power Drive Unit uses MTU's SCR-only Tier 4 final- com- pliant engine lineup, from the Series 1000 to the Series 1500. The MTU Power Drive Units will meet EPA Tier 4 emissions with- out need of DPFs or DOCs. MTU said it is developing this product family with a range of power ratings and adaptations as well as for additional emission performance. Liebherr Keeps it Simple Liebherr said its Tier 4 Final-compliant diesel engines don't require a DOC and offer excellent operating values, reasonable costs for exhaust gas aftertreatment and significantly reduced engine-system com- plexity—the result of its combination of sophisticated combustion engineering design, optimized DEF processing and integration of critical software functions in a new control unit. In simplest terms, Liebherr will offer standardized basic engines that can be adapted to emissions requirements in differ- ent markets and regions through minor mod- ifications or by fitting exhaust gas aftertreat- ment systems. Specifically, it explained, that means that its Tier 2, Tier 3 and Tier 4 engines have the same performance, the same cooling system parameters, and the same installation interfaces, enabling OEMs to substantially simplify their machine design requirements by allowing similar engines with different emission standards to be installed in the same basic machine. MTU's larger diesel models, commonly used to power haul trucks and excavators, won't require exhaust aftertreatment to meet Tier 4 Final standards, according to the company. The high-pressure common rail fuel injection system shown in this X-ray view of a Liebherr diesel is an integral element in most engine suppliers' Tier 4 Final technology. EMJ_pg38-41_EMJ_pg38-41 7/2/14 3:26 PM Page 40

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