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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DIESEL ENGINES MTU 1000-1500 family (above) and MTU 1600 (right). (Photos courtesy of Tognum MTU) While several of the new engines on show were best suited for lighter-weight applications than would normally be found in mining, the TCD 7.8 is the company's most powerful mid-class engine. Its maximum output of 250 kW (335 hp) and top torque of 1,400 Nm advances this six-cylinder engine to a class that used to be dominated by 9-liter engines, Deutz said. The engine has a long service life, long service intervals and 3%–5% lower fuel consumption than its Tier 3 predecessor, it added. The company's V-engines also offer robust design and low operating costs, with a compact and light weight design. They can fit into small spaces, so there is more room for other components, it added. The six-cylinder TCD 12.0 delivers a maximum output of 390 kW (523 hp) while the eight-cylinder TCD 16.0 is the company's largest unit with a 520 kW (697 hp) rating. The TCD 12.0/16.0 engines conform to Tier 4/Stage IV with an SCR-only concept, using two SCR systems in series. Developed from the DVERT SCR concept for these engines at Tier 4i/Stage IIIB, this makes it possible to dispense with EGR for V-engines. Deutz claims that its new generation of engines can reduce fuel consumption by 3%-5%, depending on the application, the load profile and the output, having already gained 5%-10% better fuel economy in the transition to Tier 4i/Stage IIIB. All of its new designs are compact and produce low noise levels, with minimal effort needed for installation. 50 E&MJ; • JULY 2013 MTU: Combustion Optimization Focus As noted in E&MJ;'s bauma report (See June, pp.98-109), MTU presented its fourand six-cylinder Series 1000 in-line engines and six-cylinder Series 1100, 1300 and 1500 in-line engines at the show. Designed for power outputs under 560 kW and equipped with SCR, these engines comply with the EU Tier 4f/Stage IV, with typical applications including haul trucks, wheel loaders, mobile cranes, excavators and underground mining vehicles. For countries with less stringent emissions rules, MTU said it will continue to supply its Series 900, 460 and 500 units. From 2014, MTU's 10- and 12-cylinder Series 1600 units will be extending the engine range available up to 730 kW. Launched in 2009, the Series 1600 engines are suitable for use in haul trucks, wheel loaders, pump drives and drill rigs, Deutz TCD 16 V-8. (Photo courtesy of Deutz) meeting Tier 4f requirements through the use of high-pressure common-rail fuel injection, two-stage turbocharging and EGR with a cooling system. To keep fuel consumption as low as possible, MTU has focused on optimizing the combustion processes. The Series 1600 now covers power outputs from 567 to 730 kW (760–979 bhp), with a displacement volume of 1.75 liters per cylinder. Unlike the smaller engine models that are based on truck engines, MTU developed Series 1600 as an autonomous off-highway engine family. MTU pointed out that in mobile machinery applications, engines must not only satisfy emissions legislation, but also be specifically optimized to reduce their space claim, weight and fuel consumption. By building to a modular principle and equipping them with a large number of interchangeable options, MTU claims to have designed engines that are specially optimized for industrial applications. Their few interface connections, such as those for coolant, electronics and air-intake piping, make Series 1600 installation quick and inexpensive, the company added. The charge-air coolers are directly mounted on the engine, for example, with the straightforward installation features translating into low overhaul and operating costs. MTU pointed out that, as with all its engine famwww.e-mj.com