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THE IMPACT OF FUEL INJECTION PUMP DELIVERY RATE ON THE QUALITY OF FUEL ATOMIZATION BY A W1F-01 INJECTOR

Paweł Krause

First published: 2018-06-20https://doi.org/10.5593/sgem2018/5.2/s20.124View metrics

Abstract

The quality of fuel atomization in diesel engine, commonly represented by the mean drop size, is critical for fuel-air mixture, and for the rate of fuel evaporation and combustion. Poor quality fuel-air mixtures are a source of harmful exhaust gas components, such as nitrogen oxides and particulates. In spite of advanced technologies, mentioned components still are not eliminated from combustion products. The article presents the results of the impact of fuel pump delivery rate and fuel viscosity on the course of atomization. The determination of droplet size was based on the Sauter Mean Diameter (SMD). In addition, changes in the value of SMD during injection have been analyzed. The delivery rate of an injection pump was changed in the 25% - 100% range of the maximum rate. Liquids used for the tests had a viscosity varying in the range 4 - 36 mm2/s, which contains the viscosities of fuels recommended by marine engine makers. The experiment was performed at a test stand featuring a plunger injection pump, spraying fuel in the air of atmospheric pressure. The quality of spray was examined by means of a Spraytec STP 5929 analyzer. An image of a fuel spray was recorded by a High-Speed HHC Camera X1. Raising the pump delivery rate above the nominal dose and increasing liquid viscosity led to more sprays generated by the atomizer nozzle. Increased fuel pressure, in turn, (controlled injector opening pressure) brought about a smaller number of sprays. The standard methodology used for the determination of droplet size in a spray (in the whole cycle of injection) did not reveal significant changes of mean droplet size. Alternate increases and reductions of engine load or revolutions (changes of fuel dose), are conditions typical of ship manoeuvring, especially in a harbour. Such conditions may cause the division of one fuel dose into a number of sprays, which changes the process of forming fuel-air mixture and may affect the composition of exhaust gas. The observed phenomena refer to the process of precise fuel atomization control.

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Publication details

Title
THE IMPACT OF FUEL INJECTION PUMP DELIVERY RATE ON THE QUALITY OF FUEL ATOMIZATION BY A W1F-01 INJECTOR
Authors
Paweł Krause
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Ecology, Economics, Education and Legislation
Publisher
STEF92 Technology
Year
2018
Pages
963-972
SWS Citekey
Krause201820963972
ISSN
1314-2704
ISBN
978-619-7408-47-8
Language
en
Publication type
Conference Paper
Keywords
diesel enginedirect injectionfuel atomizationexhaust gas emission
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