Diesel Engine Aftertreatment

From autolab

Contents 1 Researchers 2 Sponsors 3 Abstract 4 Goals 5 Achievements

[edit] Researchers

• Dennis Assanis
• John Hoard
• Stani Bohac
• Stefan Klinkert
• Mike Smith
• Rob Middleton
• Luke Hagen

[edit] Sponsors

• Michigan Economic Development Corp (MEDC)
• Eaton Corporation

[edit] Abstract

Exhaust aftertreatment is needed in order for diesel engines to meet current and future emissions regulations. Particular challenges for diesel aftertreatment include:

• Nitrogen oxides (NOx) removal in lean exhaust
• Particulate filtration and filter regeneration
• Hydrocarbon (HC) and carbon monoxide (CO) oxidation at low exhaust temperature

Catalysts being developed for this applications include:

• Lean NOx Trap (LNT)
• Selective Catalytic Reduction (SCR) with HC, H2 (hydrogen) or urea reductant
• Diesel Particulate Filter (DPF), often catalyzed
• Diesel Oxidation catalyst (DOC)
• Reformers used to convert fuel to H2/CO for improved catalyst regeneration
• Combinations of the above for aftertreatment systems

[edit] Goals

• Accurate and detailed measurement of steady state and transient catalyst and system performance on engine and on synthetic gas bench
• Develop global kinetic models that describe these functions
• Optimize control strategy, catalyst formulation, catalyst size and location

[edit] Achievements

• 6.4L Powerstroke diesel engine installed in dynamometer with aftertreatment system.
• Synthetic gas bench with capability to mix up to 20 gases and liquids, and perform automated testing installed.
• Initial LNT, SCR, DOC, DPF models in place and development underway.