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Characteristics of Icing Phenomenon on Injector in a Liquid Phase LPG Injection SI Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 19, 2003 by SAE International in United States
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A liquid phase LPG injection (LPLi) system has been considered as one of the next generation fuel supply system, since it has a very strong potential to accomplish the higher power, higher efficiency, and lower emission characteristics than the mixer type that is classified as a second generation technology, whereas the LPLi system is classified as a third generation technology.
However, when a liquid LPG fuel is injected into the inlet duct of an engine, a large quantity of heat is extracted due to its high latent heat of evaporation. This leads the moisture in the air to freeze around the nozzle exit, which is called icing phenomenon. It may cause damage to the outlet nozzle of an injector or inlet valve seat. In this work, the experimental investigation of the icing phenomenon was carried out.
The results showed that humidity of air rather than the temperature of air in the inlet duct mainly controlled the icing process. Also, it was observed that the total amount of ice formed around the nozzle weighed at about 100mg∼260mg for 10 minutes after injection. Some fuel species were found in the ice attached on the front side of a nozzle, while frozen ice attached on the rear of a nozzle was mostly consisted of moisture of inlet air. Therefore, some frozen ice deposit, detached from front nozzle of an injector, may cause a problem of unfavorable air fuel ratio control in an LPLi engine.
CitationKim, C., Oh, S., Lee, Y., Kang, K. et al., "Characteristics of Icing Phenomenon on Injector in a Liquid Phase LPG Injection SI Engine," SAE Technical Paper 2003-01-1919, 2003, https://doi.org/10.4271/2003-01-1919.
- van der Steen M. “Gaseous Fuels: Past Experiences and Future Expectations” TNO-paper VM9608 1996
- Hollemans Bas Conti L. de Kok P. “Propane the ‘Clean’ Fuel as the Next Century for Light and Heavy Duty Vehicles” TNO-Paper VM9504 1995
- Kang Kernyong Lee Daeyup Oh Seungmook Kim Changup “Performance of an Liquid Phase LPG Injection Engine for Heavy Duty Vehicles” SAE 2001-02-1958 2001
- Kang Kernyong Lee Daeyup Oh Seungmook Kim Changup “A Fundamental Study on a MPI LPG Engine for Heavy-Duty Vehicles” The 5th International Symposium on Diagnostics and Modeling of Combustion in Internal Combustion Engine 2001
- Kim Changup Lee Daeyup Oh Seungmook Kang Kernyong Choi Hoimyung Min Kyoungdoug “Enhancing Performance and Combustion of an LPG MPI Engine for Heavy Duty Vehicles” SAE 2002 International Congress and Exposition, 2002-01-0449 2002
- Ohm Seungmook Kim Seungyu Bae Choongsik Kim Changup Kang Kernyong “Flame Propagation Characteristics in a Heavy-Duty LPG Engine with Liquid Phase Port Injection” SAE International 2002 Spring Fuels and Lubricants Meeting and Exposition, 2002-01-1736 2002
- JAASMA Servatius Alfons Maria Injection device 1998
- Kim Changup Lee Daeyup Oh Seungmook Kang Kernyong “Investigations of Icing Phenomenon in Liquid Phase LPG injection System for Heavy-duty Engine” The 6th Annual Conference on Liquid Atomization and Spray System - Asia(ILLSS-ASIA 2001) Oct 11-13 Busan, Korea
- Mills A.F. “Heat Transfer” Irwin 1992
- Moran M.J. Shapiro H.N. “Fundamentals of Engineering Thermodynamics” 4th Wiley 2000