Coal Age

JUN 2013

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diesel engines continued gas to be delivered at high pressure to the combustion chamber. The natural gas is injected at the end of the compression stroke. Natural gas requires a higher ignition temperature than diesel, so to assist with ignition, a small amount of diesel fuel is injected into the engine cylinder followed by the main natural gas fuel injection. The ignited diesel fuel acts as a pilot light. HPDI allows replacement of approximately 95% of the diesel fuel (by energy) with natural gas, according to Westport, but efficiency remains roughly the same as a pure diesel engine. CO 2 emissions are reduced by about 22%. Development programs are under way at Caterpillar for both new and existing engines, combustion technology and fuel systems. According to Luis De Leon, Caterpillar vice president with responsibility for the Mining Products Division, work on LNG-powered Cat 793, 795 and 797 trucks is in the early stages, with commercial launch expected within five years. In addition to offering new LNG products, Caterpillar and EMD are developing retrofit solutions for those who opt to convert existing mining trucks and locomotives to natural gas. Longer term, the company expects to use natural gas technologies in other mining products. Designing for Dual-fuel Applications Cummins also announced plans to produce dual-fuel engines for haul trucks. The first engine in the Cummins Dual Fuel portfolio for mining is the QSK60, with other QSK Series engines to follow, including engines capable of meeting EPA Tier 4 Final emissions standards. A release date will be announced in the coming months. The QSK60, with output of 1,782– 2,850 hp (1,329–2,125 kW), is currently available in standard and high-altitude configurations; according to Cummins, both versions will be capable of substantially reducing fuel costs with Cummins Dual Fuel technology. Cummins said its dual fuel engines will use integrated controls that optimize the fuel-substitution rate based on operating conditions, and will seamlessly and automatically transition between diesel fuel and dual-fuel modes. Cummins Dual Fuel technology enables mining equipment to operate in 100% diesel fuel or in dual-fuel mode, giving the customer flex- ibility depending on natural gas availability at the mine site. "The rapid expansion and abundance of natural gas in many areas of the world has driven a dramatic cost advantage of natural gas over diesel fuel. The ability to substitute diesel fuel with natural gas drives down the total cost of ownership of equipment," said Mark Levett, vice president–Cummins HighHorsepower Business. "For operators of high-horsepower mining equipment where power density is critical and large quantities of fuel are burned, Cummins Dual Fuel technology provides an opportunity for a dramatic reduction in dollars spent on fuel while retaining the same power and durability customers have come to expect from Cummins diesel engines," said Levett. In dual-fuel mode, the substitution rate, which is the percentage of natural gas relative to total fuel flow, is the critical parameter to fuel savings. In typical operating conditions, engines with Cummins Dual Fuel technology can be expected to deliver a maximum substitution rate of 70%. David Geraghty, executive director– Cummins Mining Business, said, "Engines with Cummins Dual Fuel technology retain Company Profile - Paid Advertisement The ALL Family of Companies A legacy of excellence is unstoppable. In 1964, the ALL legacy began with three brothers and one crane. Three generations later, our business values echo the family values handed down by our founders. We base our daily operations on their unshakable code of conduct and their vision of unequivocal service. Unequivocal service. Prior to our founding, contractors owned their own equipment—and all the headaches and expense of maintenance. ALL Erection & Crane Rental Corporation's founding philosophy was to not only shift ownership, but to own the maintenance responsibility. Today, customers expect that we will provide reliable machines to get a job done, and, to meet that expectation, we train every member of our team to understand that we are more than a crane rental company; rather, we are a fleet maintenance company. The difference was understood by our founders. In short, constant maintenance positively affects customer productivity and the value of the ALL brand. ALL has grow to be better prepared, both in advance with properly maintained machines, and in eventuality, with the best mechanics and a war chest of parts on the ground ready to take flight when the inevitable episode of down- 46 time occurs. These parts, service, and even the equipment itself are delivered along a supply route, which also took great planning. This is ALL, and the legacy is now unstoppable. Growing new branches grows the supply route. The model of geographically tangent growth is a system steadfastly adhered to by the ALL enterprise to ensure that local, regional, and national customers benefit from the strength of the entire family of companies. We never open outposts to stand alone, unsupported. Instead, we have grown carefully for three generations. We consider each new branch to be a necessity to local customers, but also part of a chain, one made stronger link by link. For more information, visit Contact Information: ALL Erection & Crane Rental Corp. (headquarters) 4700 Acorn Drive Cleveland, OH 44131 800-232-4100 (toll free) 216-524-6550 (local) 216-525-3683 (fax) Website: June 2013

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