JOHN Deere says its construction equipment will use cooled exhaust gas recirculation (EGR) engines to meet the 2011 Interim Tier 4 emissions regulations.
According to Deere, these regulations were mandated by the EPA and EU for diesel engines 174hp and above, with exhaust filters consisting of a diesel oxidation catalyst/diesel particulate filter.
The manufacturer says it believes cooled EGR with exhaust filters is the right technology right now and is looking to provide the simplest iT4 solution for equipment users, all while delivering the productivity.
This approach to the iT4 solution is said to build upon the current clean burning and fuel efficient Tier 3/Stage III A PowerTech Plus engine platform manufactured by John Deere Power Systems.
Deere says testing in key products featuring these engines, such as the 350D excavator, 700J crawler dozer and the new 772G motor grader, has shown a 10% or greater advantage in ‘material moved per fuel used’ over competitors.