Hitachi Excavators to Use EGR Technology

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.