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STRONG PARTNERS. TOUGH TRUCKS2011 EPA Tier 4 Interim & EU Stage IIIB Emissions RegulationsFor Engine Power Outputs over 174 hp (130 kW)29. Can Direct Flow extend filter change intervals?The increased air flow efficiency of the Direct Flow air cleaner offers operators the opportunity toextend air filter element service internals and potentially lower air filter costs.30. How does the crankcase ventilation filter improve the engine?Tier 4 Interim / Stage IIIB requires that crankcase emissions, also known as blowby gasses, beeliminated. To achieve this, Cummins engines incorporate a highly efficient coalescing filter. Thefilter returns the oil to the crankcase and provides the added benefit of removing oil mist and tinyoil droplets, ensuring that the engine and powertrain remain cleaner than at Tier 3 / Stage IIIA.The crankcase filter requires a simple filter element change at 2,500 hour intervals.Electronic Enhancements31. How does the Electronic Control Module (ECM) differ from Tier 3?The Tier 4 Interim / Stage IIIB engine management system has been significantly upgraded. Thelatest electronic control module provides three times faster processing power and double thememory capacity of the Tier 3 / Stage IIIA module.Cummins has a unique advantage in that it designs the core programs and algorithmsneeded to precisely control the engine from air-intake to exhaust after treatment as a singleintegrated system.32. Does Cummins use the same electronic system for all engines?Yes. Cummins latest generation CM2250 electronic control module will be incorporated on allTier 4 Interim / Stage IIIB engines to ensure electronic commonality across equipment ranges.14