The Environmental Protection Agency (EPA) and European Union (EU) have certified Lenexa, Kan.-based John Deere Power Systems' (JDPS) PowerTech PVX 9.0L and PowerTech PSX 9.0L model off-highway 56 kW (75 hp) and above engines as compliant with the Interim Tier 4 and Stage III B regulations. Interim Tier 4/Stage III B emissions regulations begin January 1, 2011, for 130 kW (174 hp) and above engines and require a 90 percent reduction in diesel particulate matter (PM) and a 50 percent reduction in nitrogen oxide (NOx) from previous Tier 3/Stage III A requirements.

“The EPA and EU certifications of our 9.0L engines are tremendous milestones for JDPS,” said the company's Product Planning Manager Doug Laudick. “We believe our chosen technology path provides the best value for Interim Tier 4/Stage III B, and the certifications are proof that our emission reduction technologies are paying off for the environment and our customers.”

John Deere met the EPA and EU requirements by adding an exhaust filter for reducing PM to the PowerTech Plus Tier 3/Stage III A in-line, six-cylinder engine platform, which includes cooled exhaust gas recirculation for NOx control. The engines will feature full-authority electronic controls, a four-valve cylinder head, a high-pressure fuel system, turbocharging and an air-to-air aftercooling system.