Coal Age

JUN 2013

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Page 48 of 67

diesel engines continued the same transient response as a diesel engine, remain on the same torque curve as a diesel engine, and match diesel engine power output while maintaining current service intervals. This technology not only delivers the uptime customers have come to expect from us, but also delivers a rapid return on investment, making it very attractive to mines around the world." Tognum's MTU diesel group also is looking at dual-fuel engines for mining and other applications, but hasn't yet announced strategy details. According to Tognum America/MTU spokesman Gary Mason, "We've been seeing an increasing amount of interest from our customers in large, mobile, high-speed, natural gas-powered engines. MTU has years of experience with [natural] gas engines in the Onsite Energy business, and we are exploring and prioritizing opportunities to develop mobile gas engines primarily based on our MTU Series 4000 engine platform." installed and engine power and torque output is maintained to OEM specifications. "Our Evo-MT System is able to provide our customers with a 'here and now' solution that can be quickly and seamlessly adopted into their operations, making an immediate impact to the bottom line," GFS President Jason Green said when announcing the Evo-MT 7930's market introduction. "We developed the Evo-MT System in direct response to our mining customers who have long sought a practical LNG retrofit option for large mine haul trucks," Green said, describing the product as a "smart, cost effective and sustainable natural gas solution." GFS promises additional products for Caterpillar vehicles, as well as for Komatsu mine haul truck models, and says it is working on both mechanical and electric drive applications in the 100 to +300 ton class range. Ready for Retrofit For operators that prefer not to wait for OEM dual-fuel solutions, Florida-based GFS Corp. is offering aftermarket systems for some of the more popular models of haulage trucks. The company's Evo-MT 7930 system is available for Cat 793 series trucks and the Evo-MT 7770 for Cat 777 series. GFS has sold both types of systems to fleet operators in Wyoming and in the eastern U.S. coal districts. According to the company, its systems are designed to be installed without major modifications to the chassis or drive engine of the truck, and allow trucks to run on diesel fuel alone in the event of a fault condition or low LNG fuel level. Truck haul capacity is maintained after the Evo-MT System is GFS Corp. offers natural gas fuel conversion kits for two popular models of Cat haul trucks. June 2013 47

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