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Union Pacific's "Green" Fleet

US.WEBTRAINS.NET
04/23/2008 AT 05:24

Union Pacific has tested, and continues to evaluate, one other type of environmentally friendly low-horsepower rail yard locomotive called the "Green Goat." It uses state-of-the-art diesel-battery hybrid-technology designed to cut air emissions by 80 percent and reduce diesel fuel use by 16 percent compared to conventional diesel-powered locomotives used in switching service. The hybrid switcher is powered with large banks of batteries. When energy stored in the batteries is depleted to a pre-set level, a small, low-emission diesel engine automatically starts to power a generator that recharges the batteries.

Union Pacific is also testing two types of "after-market" technologies to determine if they reduce emissions in older locomotives. They are:
- An experimental "oxidation catalyst" filtering canister, or "Oxicat," which was installed inside the diesel engine's exhaust manifold on a high-horsepower long-haul locomotive in January 2007. This locomotive began a field test in the Los Angeles area, which will end sometime in 2008. This is the North American rail industry's first long-haul diesel electric locomotive modified with after-market experimental technology aimed at reducing exhaust emissions. The special catalytic material chemically reduces the amount of unburned hydrocarbons, carbon monoxide and particulate matter generated by the diesel engine, much like a catalytic converter on today's cars and trucks.
- A Diesel Particulate Filter (DPF) which was attached to a low-horsepower yard locomotive that is operating in Union Pacific's Oakland rail yard. This field test, which began in December 2006, is also the North America rail industry's first experimental after-market exhaust system filter to determine if it will reduce diesel engine emissions in older locomotives used in rail yards.

Since 2004, Union Pacific has achieved a more than five percent improvement in fuel efficiency through the Fuel Masters program. This innovative program rewards locomotive engineers for efficiently operating trains. In 2007, Union Pacific saved more than 20 million gallons of diesel fuel. The company has more fuel savings improvement opportunities ahead as the Fuel Masters program and other initiatives are refined and expanded across the railroad.

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