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Detroit Diesel Showing its Medium- and Heavy-Duty 2007 Engines
6 April 2006
In 2007, Detroit Diesel will launch three re-developed engines—its two heavy-duty engines, the Series 60 and MBE 4000, and medium-duty MBE 900—certified to meet EPA 2007 requirements.
These regulations call for, among other things, a reduction in emissions of oxides of nitrogen to 1.1 g/bhp-hr (more than a 50% reduction from current levels) as well as a reduction of particulate matter emissions to .01 g/bhp-hr (90% reduction).
For all three engines, Detroit Diesel replaced the muffler assembly in the exhaust system with an aftertreatment system. This unit includes a Diesel Oxidation Catalyst (DOC) and a Diesel Particulate Filter (DPF) located in the exhaust system.
During normal operation, exhaust heat and the catalyst work together to oxidize the soot. Additionally, optimized Exhaust Gas Recirculation (EGR) will be applied to treat NOx and the next-generation electronic control unit—DDEC VI—offers increased power, memory capability and enhanced diagnostics.
The DDEC VI electronics also manage active regeneration of the particulate filter when the exhaust temperature is insufficient to achieve passive regeneration (less than 300º C).
The Series 60, MBE 4000 and MBE 900 will also use a new fuel system including dual solenoid electronic unit injectors that provide exact fuel metering and enable independent injection pressure control.
The redeveloped Series 60 reduces oil consumption by nearly 40% due to the introduction of a new piston design, changes in oil control ring geometry and a smoother bore finish on the cylinder liner.
An electronic variable geometry turbocharger automatically adjusts its boost across the operating range, and delivers quick lift on the low end, where turbo lag would otherwise occur.
April 6, 2006 in Diesel, Emissions, Fleets | Permalink | Comments (0) | TrackBack (0)
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