Coal Age

JUN 2016

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52 www.coalage.com June 2016 engine technology Simpler, Smaller — and Stronger by russ carter, western field editor The recent bauma trade fair in Germany provided a golden opportunity for diesel engine manufacturers to introduce new models and highlight product line up- grades for an audience of show attendees estimated at just under 600,000. Among the names most familiar to mining in- dustry customers, MTU, Cummins, Volvo Penta, and Caterpillar all had new engines and/or services on display, and Liebherr highlighted its new diesel/gas engine plat- form, which has been in development for several years. MTU: No Aftertreatment MTU had a 10-cylinder Series 1600 en- gine and a 12-cylinder Series 2000 engine on display at bauma, covering a pow- er range of 500-plus kilowatts to 1,000 kW (670–1,350 hp). MTU's Series 1600 engines are available for the 567- to 736-kW power range. In addition to com- plying with U.S Environmental Protec- tion Agency's (EPA) Tier 4 emission reg- ulations, they also meet future European Union (EU) Stage V regulations using only internal engine technology — no exhaust aftertreatment required. MTU's Series 2000 engines cover a power range from 560 to 1,000 kW and are compliant with EPA Tier 4 emission regulations — again, using only internal engine technology. In addition, MTU offers 8-, 12-, 16- and 20-cylinder Series 4000 models with pow- er outputs extending to 3,000 kW. They meet EPA Tier 4 emission regulations with no exhaust gas aftertreatment. Chief engineer Norbert Eisenblätter, who has been with MTU for 35 years and heads its mining engine development pro- gram, recounted his company's emergence as a leading engine supplier to the mining industry. "Back in the late 1980s, we were mostly unknown in the industry," said Eisenblätter. "But after Wiseda and others began to develop the first two-axle, 240- ton trucks, they asked us if we could pro- vide a four-stroke, 2,500-hp engine — the big trucks at the time were often powered by a Detroit Diesel 149 Series two-stroke diesel." "We said 'of course,' and that marked the beginning of our involvement in the mining industry," he explained. "Later, in the 1990s when the industry went to 320- ton trucks, we developed a 3,700-hp engine. And as part of our collaboration with De- troit Diesel, we developed the 4000 Series engines, which had a common-rail fuel in- jection system. Mining customers saw the advantage of this unique feature — reduced fuel consumption with overall lower cost of ownership — and that opened a wide door for us into the mining market." "In 2006, I spent six weeks on a world- wide tour visiting with dealers, OEMs and customers to compile a requirements list for new engines that would be required to meet Tier 4 emissions requirements," he continued. "Looking ahead at the possi- ble necessity for exhaust aftertreatment to meet that standard, they told us that they wanted minimal impact to engine instal- lation-space requirements and minimal need for aftertreatment system care and maintenance in the mine." "As a result, in 2011, we released the first Tier 4i-compliant engine, and it was the only engine in its class that did not require exhaust aftertreatment," said The BelAZ 75710 — billed as the world's largest haul truck — employs two MTU Series 4000 16-cylinder diesel engines, generating a total of 3,430 kW (4,600 hp). To save fuel, both engines operate at full power only when the 450-mt-capacity truck is loaded; when empty, it runs on one engine while the other engine idles. Diesel suppliers are preparing their engine platforms for the next set of emissions standards MTU's Series 1000 to 1500 engines are jointly developed by MTU and Daimler, based on Daimler commercial vehicle engines, to meet EU Stage V regulations. These engines meet future EU Stage V emission limits using advanced internal engine technology, an SCR system and an additional diesel particulate filter.

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