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Freeze Protection of Onboard Urea Co-Fueling System
Technical Paper
2006-01-0645
ISSN: 0148-7191, e-ISSN: 2688-3627
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Language:
English
Abstract
The urea co-fueling approach to refilling a urea storage container onboard a vehicle is based on the design of a two-fluid dispensing nozzle. With a single refueling operation the nozzle enables an independent delivery of two fluids, diesel fuel and urea, into two separate containers. The person refueling the vehicle needs no new skills or knowledge. But most importantly, the co-fueling method eliminates a separate and a critical action of keeping up with timely refills of the urea as the condition for emissions compliance for the vehicle.
However, freezing of aqueous solution of urea below -11.5°C puts additional demands on the design of the two-fluid nozzle and the vehicle fill pipe receptacle, so that a reliable co-fueling process is assured at these cold weather conditions. The paper describes the methods that prevent formation of ice in the co-fueling fill pipe, which would enable refilling of urea during continuous use of the vehicle at temperatures below urea freezing point.
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Authors
- Laura Freeman - Colorado University, Boulder
- Justin Reilly - Colorado University, Boulder
- Matthew Weber - Colorado University, Boulder
- Andrew Sterling - Colorado University, Boulder
- Mikael Pryor - Colorado University, Boulder
- Karl Hausmann - Colorado University, Boulder
- Melvyn Branch - Colorado University, Boulder
- Michael Levin - Ford Motor Company
- Larry Brouwer - Ford Motor Company
- David Furedy - Roush Industries, Inc.
- Jeremy Keller - Roush Industries, Inc.
Topic
Citation
Freeman, L., Reilly, J., Weber, M., Sterling, A. et al., "Freeze Protection of Onboard Urea Co-Fueling System," SAE Technical Paper 2006-01-0645, 2006, https://doi.org/10.4271/2006-01-0645.Also In
References
- Müller W. et al. “Selective Catalytic Reduction - Europe's NOx Reduction Technology” SAE Paper 2003-01-2304
- Hirata K. et al “Development of Urea-SCR System for Heavy-Duty Commercial Vehicles” SAE Paper 2005-01-1860
- Fable S. Venkatesh S. “Development of a Urea Infrastructure to Support MY2007+ Heavy-duty Vehicle Emission Requirements” TIAX LLC 2003
- Lambert C. et al. “Urea SCR and CDPF System for Diesel Sport Utility Vehicle Meeting Tier 2 Bin 5” 2004 DEER Conference
- Levin M. Baker R. “Co-fueling of Urea for Diesel Cars and Trucks” SAE Paper 2002-01-0290