Texas Environmental Research Consortium
Environmental Improvement Through Research
 
Project N-041
Simultaneous and Substantial Reductions in Nitric Oxide and Particulate Matter Emissions via the Development of Low Temperature Combustion in Diesel Engines

Sub-Grantees:Texas Engineering Experiment Station (TEES)

This proposed research addresses the development and proof of concept testing of a novel nitric oxides (NOx) reduction technology – namely, diesel premixed compression ignition (PCI) combustion – for new or existing diesel engines. PCI combustion is a novel mode of combustion that relies on low temperature mechanisms to significantly and simultaneously reduce NOx and particulate matter (PM) emissions from a diesel engine. The major objectives of the proposed work are:

  • Demonstrate simultaneous and greater than 50% NOx and PM emissions reductions (relative to present-day base calibration emissions) from a diesel engine using a low temperature combustion (LTC) mode, namely diesel PCI.
  • Determine the PCI mode (manifested by strategic injection timings and EGR rates) that minimizes the fuel consumption penalty (if any) with acceptable constraints applied to NOx and PM emissions and noise levels using a model-based diesel PCI engine simulation.

In summary, the research incorporates an integrated approach of experimental- and modelbased activities that aims to demonstrate a novel mode of combustion capable of simultaneously reducing NOx and PM emissions by greater than 50%. The experimental work will take place on a medium-duty diesel engine with uses in off-highway and construction applications. The modeling work will construct a diesel PCI engine simulation which will be used to identify the minimal fuel consumption attained with a diesel PCI combustion mode, meeting the targeted emission reductions.


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