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Evaluation of a Particulate Trap System and an Ethanol Injection/Catalyst System on an Upgraded DDC 6V-92 TA Transit Bus Engine
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Abstract
Transit agencies continue to be the focus of heavy-duty diesel engine emission reduction programs by using Federal regulations as well as self-imposed mandates to reduce smoke and particulate emissions. Such is the case with the Miami Valley Regional Transit Authority, which wanted to characterize the emissions of a 1985 model year Detroit Diesel Corporation (DDC) 6V-92 TA diesel engine that was rebuilt using DDC Upgrade Kit 10-B. In addition to determining the baseline exhaust emissions from the upgraded engine, two separate emission reduction technologies were evaluated. The first system evaluated was an electrically regenerated particulate trap oxidizer developed jointly by Donaldson and 3M The second technology evaluated was an ethanol injection system in conjunction with an oxidizing catalyst designed and manufactured by Midwest Power Concepts (MPC) Emission tests were performed in accordance with the heavy-duty diesel engine transient Federal Test Procedure (FTP). Transient test results, reported in grams per horsepower-hour (g/hp-hr) for each configuration tested, include emissions of hydrocarbons, carbon monoxide, oxides of nitrogen, particulate, and aldehydes. Baseline engine-out emission levels of the upgraded DDC 6V-92 TA engine were well below the target of 1989 model year certification levels. The particulate emission level of 0.11 g/hp-hr approached the EPA 1993 urban bus standard of 0.10 g/hp-hr. The Donaldson trap system was effective in further reducing this particulate level by about 50 percent. The MPC ethanol injection/catalyst system was also effective in reducing particulate emissions by almost 50 percent, but with a penalty of increased organic material hydrocarbon equivalent (OMHCE) emissions. Oxides of nitrogen (NOx,) emissions were somewhat lower for both the Donaldson trap system and the MPC system when compared to baseline levels.
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Fritz, S. and Giuliani, C., "Evaluation of a Particulate Trap System and an Ethanol Injection/Catalyst System on an Upgraded DDC 6V-92 TA Transit Bus Engine," SAE Technical Paper 931787, 1993, https://doi.org/10.4271/931787.Also In
Alternative Fuels: Alcohols, Hydrogen Natural Gas and Propane
Number: SP-0982; Published: 1993-08-01
Number: SP-0982; Published: 1993-08-01
References
- 40 CFR Part 86-Protection of the Environment “Emission Regulations for New Otto-Cycle and Diesel Heavy-Duty Engines; Gaseous and Particulate Exhaust Test Procedures.”
- 40 CFR Part 86-Protection of the Environment “Emission Regulations for New Otto-Cycle and Diesel Heavy-Duty Engines; Gaseous and Particulate Exhaust Test Procedures.”
- Smith, L.R. et al “Analytical Procedures for Characterizing Unregulated Emissions From Vehicles Using Middle Distillate Fuels,” Interim Report, Contract No. 68-02-2497 United States Environmental Protection Agency, Office of Research and Development April 1980
- Smith, L.R. “Characterization of Exhaust Emissions From Alcohol-Fueled Vehicles,” SwRI Final Report prepared for the Coordinating Research Council, Inc., CAPE-30-81 May 1985
- 40 CFR Part 86-Protection of the Environment “Emission Regulations For New Diesel Heavy-Duty Engines; Smoke Exhaust Test Procedures.”
- Fritz, S.G. “Evaluation of a Particulate Trap System and an Ethanol Injection/Catalyst System,” SwRI Final Report 08-4854 prepared for the Miami Valley Regional Transit Authority December 1992