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Project at a Glance

Project Status: active

Title: Off-Road Diesel Low-Emission Demo for Nitrogen (NOx), Particulate Matter (PM), and Toxics

Principal Investigator / Author(s): Sharp, Christopher

Contractor: Southwest Research Institute

Contract Number: 18RD006

Research Program Area: Emissions Monitoring & Control

Topic Areas: Mobile Sources & Fuels, Monitoring

Research Summary:

The objectives of this project are to characterize the emission rates of criteria pollutants and non-criteria pollutants of two Tier 4 final off-road diesel engines with similar power ratings but different aftertreatment configurations, and identify potential engine and aftertreatment configurations strategies to maximize emission reductions using a numerical model.

The contractor will conduct a comprehensive literature and California market review of the current Tier 4 off-road engine and aftertreatment technologies. The contractor will then acquire two Tier 4 final off-road diesel engines with similar power ratings in the range of 56 to 560 kW. One engine must be equipped with a combined DPF and SCR aftertreatment system, and the other engine must be equipped with an SCR-only system. The contractor will test the acquired engines on an engine dynamometer over the certification cycles and at least one vocational cycle. The contractor will conduct comprehensive speciation of criteria pollutants and non-criteria pollutants. Finally, the contractor will conduct numerical simulations to identify engine and aftertreatment strategies that potentially optimize system operation and maximize the reduction of NOx emissions without increasing emissions of other pollutants and fuel consumption.


For questions regarding this research project, including available data and progress status, contact: Research Division staff at (916) 322-3893

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