Hitachi Excavators to Use EGR Technology

Company says it will use engines with EGR Technology to meet emissions regulations.

Published January 25, 2010
Hitachi Construction Machinery, with U.S. headquarters in Moline, Ill., has announced that its Hitachi excavators will feature engines with cooled exhaust gas recirculation (EGR) and exhaust filters consisting of a diesel oxidation catalyst/diesel particulate filter to meet the 2011 Interim Tier 4 (IT4)/Stage III B emissions regulations mandated by the Environmental Protection Association (EPA) and EU for diesel engines ranging from 174 to 750 horsepower. “Hitachi believes this is the simplest IT4 solution,” says Mark Wall, product marketing manager for Hitachi construction excavators in the Americas. “And it continues to deliver the productivity, fuel efficiency, and reliability that customers expect from Hitachi.”

Hitachi says its approach to meeting IT4 regulations is an evolution of the current clean-burning and fuel-efficient Tier 3/Stage III A Isuzu engine platform currently used in Hitachi excavators.

The Isuzu cooled EGR engine platform for IT4 compliance is less complex to maintain compared with SCR (selective catalytic reduction) systems. "Unlike SCR, this IT4 solution doesn't require liquid urea to achieve the necessary emissions reduction. There aren’t any other fluids to acquire, fill, and store on jobsites," Wall says. "EGR requires just one fluid – diesel fuel."

 

Many Hitachi excavators featuring Isuzu engines with Tier 3/Stage III A cooled EGR technology are running reliably today, and the Interim Tier 4/Stage III B units will be a natural next step for Hitachi dealers to sell and support, according to the company.

 

“Hitachi dealers will be ready to service and support these new engines and optimize the overall efficiency of the excavator,” Wall says.

 

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