This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Carbon Canister-Based Vapor Management System to Reduce Cold-Start Hydrocarbon Emissions
Technical Paper
2005-01-3866
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Engine out (feedgas) emissions control during cold start operations has been a major technical challenge since mandated LEV/ULEV/SULEV/PZEV regulation compliance. Cold start emissions contribute to more than 85% of total emissions in a FTP test. Unburned Hydrocarbons are mostly generated during cold starts due to a rich Air/fuel ratio strategy. Cold intake and cylinder wall surfaces do not provide a quick vaporization bed for the rich fuel, therefore un-vaporized and unburned fuel result in excessive tailpipe emissions. Utilizing fuel vapor during cold starts reduces the Hydrocarbon (HC) emissions level and minimizes the transient fuel effect process.
A vapor management system must function to control the Air-to-fuel ratio of the intake charge during “cold-starts”, idle, and drive-away, or until catalyst lights off to a desired level. Additionally, vapor fuelling can provide solutions to the inherent problems of “cold fuel enrichment”, “wall wetting”, “lost-fuel”, and “mixture preparation”, as well as, open up beneficial opportunities for lean air-fuel ratio cold starts.
A Vapor Management control System consisting of a Carbon Canister vapor source, supplying a traditional induction system augmented with additional subsystems in a preferred configuration, has been designed and tested, and the results presented in this paper. A major reduction in HC emissions over liquid port injection (PFI) is achieved.
Recommended Content
Authors
Topic
Citation
Servati, H., Marshall, S., Murphy, J., Fard Sanei, M. et al., "Carbon Canister-Based Vapor Management System to Reduce Cold-Start Hydrocarbon Emissions," SAE Technical Paper 2005-01-3866, 2005, https://doi.org/10.4271/2005-01-3866.Also In
References
- Kidokoro, T Hoshi K Hiraku K Satoya K Watanabe T Fujiwara T Suzuki H 2003 “Development of PZEV Exhaust Emission Control System,” SAE Technical Paper 2004-01-0817
- Aquino, C.F. “Transient A/F Control Characteristics of the 5 Liter Central Fuel Injection Enigne” SAE Paper 810494 1981
- Wu, H. Aquino, C. F. Chou, G. L. “A 1.6 Liter Engine and Intake Manifold Dynamics Model” ASME Paper 83-WA/DSC-93 1983
- Servati, H. “Investigation of the Behavior of Fuel in the Intake Manifold and its Relation to SI Engines” University of California Santa Barbara 1984
- Servati, H. Aquino, C. F. “A Physically Based Wall Wetting Model to Predict Induction System Dynamics” Trans. ASME, Journal of Dynamics, Measurement, and Control December 1986
- Fozo, S.R. Aquino, C.F. “Transient A/F Characteristics for Cold Operation of a 1.6 Liter Engine with Sequential Fuel Injection” SAE Paper 880691 1988
- Servati, H. Herman, H. E. “Spray / Wall Interaction Simulation” SAE Paper 890566 1989
- Chen, G. Vincent, M. T. Gutermuth, T. R. “The Behavior of Multiphase Fuel-Flow in the Intake Port” SAE Paper 940445 1994
- Shayler, P.J. Teo, Y.C. Scarisbrick, A. “Fuel Transport Characteristics of Spark Ignition Engines for Transient Fuel Compensation” SAE Paper 950067 1995
- Horie, K. Takahasi, H. Akazaki, S “Emissions Reduction During Warm-Up Period by Incorporating a Wall-Wetting Fuel Model on the Fuel Injection Strategy During Engine Starting” SAE Paper 952478 1995
- Curtis, E. W. Aquino, C. F. Trumpy, D. K. Davis, G. C. “A New Port and Cylinder Wall Wetting Model to Predict Transient Air/Fuel Excursions in a Port Injected Engine” SAE 961186 1996
- Badillo, E. Assanis N. D. N. Servati, H. “One- Dimensional Transient Dynamics of Fuel Evaporation and Diffusion in Induction Systems” SAE Paper 970058 1997
- Curtis, E. W. Aquino, C. F. Plensdorf, W. D. Trumpy, D. K. Davis, G. C. Lavoie, G. A. “Modeling Intake Valve Warm-up” ASME 29 1 1997
- Curtis, E. Russ, S. Aquino, C. Lavoie, G. Trigui, N. “The Effects of Injector Targeting and Fuel Volatility on Fuel Dynamics in a PFI Engine During Warm-up Part II - Modeling Results” SAE Paper 982519 1998
- Russ, S. Stevens, J. Aquino, C. Curtis, E. Fry, J. “The Effects of Injector Targeting and Fuel Volatility on Fuel Dynamics in a PFI Engine During Warm-up: Part I - Experimental Results” SAE Paper 982518 1998
- Avanessian, O. Curtis, E. Fan, L. Kaput, M. Russ, S. “Global P Injector Targeting Optimization for Transient Air-Fuel Ratio Control” Powertrain Conference Proceedings 24 Advanced Engine Design & Performance Ann Arbor, MI September 24 2003
- Cochard et al.
- Ashford, M. Matthews, R. Hall, M. Kiehne, T. “An On-Board Distillation System to Reduce Cold- Start Hydrocarbon Emissions” SAE Paper 2003-01-3239 2003
- Lavoie, G. A. Imai, Y. A. Johnson, P. J. “A Fuel Vapor System Model (FVSMOD) for Evaporative Emissions System Design and Analysis” FRL Report SR-97-129 Sept. 12 1997
- Servati, H “Report Canister Purge Data 12151993 File 1AD030” Ford Motor Company 1993
- Gadkaree, K. P. Servati, H. B. Then, P. M. “Fuel Vaporization for Starting an Internal Combustion Engine” 1999