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Optical Investigation of Injection and Combustion Phases of a Fouled Piezoelectric Injector in a Transparent CR Diesel Engine
Technical Paper
2013-01-1591
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This study was conducted to determine the effects of the fouling process on the piezoelectric injectors in a transparent common-rail diesel engine. Piezoelectric injectors are characterized by a ceramic actuator that can dilate or retract when it receives a pulse of current. The piezo element controls a valve, which creates an imbalance in the pressure that is exerted at each end of the needle, causing the needle rising or closing. Two same model injectors were tested; one was new and the other one was fouled on a vehicle. The aim of the experimental investigation was to evaluate the performance of a new and a fouled piezoelectric injector in terms of injection and flame evolution. It was evaluated how the nozzle carbon deposits affect the injection quantity and combustion. The experimental apparatus was a single-cylinder research engine equipped with a Euro 5 multi-cylinder head. A second-generation common rail injection system and 6-hole piezoelectric injectors were used too. The engine was optically accessible; a sapphire window was set in the bottom of an elongated piston. The engine was fuelled with commercial diesel fuel and it ran at 1500 rpm in continuous mode during the tests. Pressure signal in the engine was detected by a quartz pressure transducer that replaced the glow plug of the real engine. Injection rate was measured for both injectors. Optical techniques based on 2D-digital imaging were used to detect the injection phase and combustion evolution. A high speed camera captured the images from the combustion chamber reflected by a 45° inclined mirror set in the elongated piston. Steady-state measurements of nitrogen oxide and opacity were carried out in the raw exhaust by commercial instruments. It was found that piezoelectric injectors had a shorter injection delay than more traditional solenoid injectors whether they were new or fouled. The new injector guaranteed a good jet penetration that allowed a more efficient combustion than the fouled one. The main consequence was that the new injector produced lower exhaust emissions.
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Magno, A., Mancaruso, E., and Vaglieco, B., "Optical Investigation of Injection and Combustion Phases of a Fouled Piezoelectric Injector in a Transparent CR Diesel Engine," SAE Technical Paper 2013-01-1591, 2013, https://doi.org/10.4271/2013-01-1591.Also In
References
- Carsten , B. Mixture Formation in Internal Combustion Engine Springer Germany 2006
- Suh , H. K. , Park , S. W. , Lee , C. S. Effect of piezo-driven injection system on the macroscopic and microscopic atomization characteristics of diesel fuel spray Fuel 86 2833 2845 2007
- Payri , R. , Salvador , F. J. , Gimeno , J. , De la Morena , J. Influence of injector technology on injection and combustion development - Part 1: Hydraulic characterization Applied Energy 88 1068 1074 2011
- Payri , R. , Salvador , F. J. , Gimeno , J. , De la Morena , J. Influence of injector technology on injection and combustion development - Part 2: Combustion analysis Applied Energy 88 1130 1139 2011
- Benajes , J. , Molina , S. , Novella , R. , Amorim , R. , Ben Hadj Hamouda , H. , Hardy , J. P. Comparison of two injection systems in an HSDI diesel engine using split injection and different injector nozzles International Journal of Automotive Technology 11 2 139 146 2010
- Birgel , A. , Ladommatos , N. , Aleiferis , P. , Milovanovic , N. et al. Investigations on Deposit Formation in the Holes of Diesel Injector Nozzles SAE Int. J. Fuels Lubr. 5 1 123 131 2012 10.4271/2011-01-1924
- Lacey , P. , Gail , S. , Kientz , J. , Milovanovic , N. et al. Internal Fuel Injector Deposits SAE Int. J. Fuels Lubr. 5 1 132 145 2012 10.4271/2011-01-1925
- Čaika , V. , Kammerdiener , T. , and Dörr , N. Operation of Piezoelectric Common Rail Injector with Diesel and FT-Kerosene SAE Technical Paper 2007-24-0070 2007 10.4271/2007-24-0070
- Bosch , W. The Fuel Rate Indicator: A New Measuring Instrument For Display of the Characteristics of Individual Injection SAE Technical Paper 660749 1966 10.4271/660749
- Heywood , J.B. Internal Combustion Engine Fundamentals McGraw-Hill New York 1988
- Mancaruso , E. , Sequino , L. , Vaglieco , B. M. First and second generation biodiesel spray characterization in a diesel engine Fuel 90 2870 2883 2011
- Allocca , L. , Mancaruso , E. , Montanaro , A. , Vaglieco , B. M. Use of mineral diesel, first-, and second-generation biodiesel in modern common rail injection system under non evaporative and evaporative conditions Atomization and Sprays 22 2 97 121 2012
- Mancaruso , E. , Vaglieco , B. M. Premixed combustion of GTL and RME fuels in a single cylinder research engine Applied Energy 91 385 394 2011
- Koyanagi , K. , Öing , H. , Renner , G. , and Maly , R. Optimizing Common Rail-Injection by Optical Diagnostics in a Transparent Production Type Diesel Engine SAE Technical Paper 1999-01-3646 1999 10.4271/1999-01-3646
- Payri , R. , Gimeno , J. , Viera , J.P. , Plazas , A.H. Effect of Partial Needle Lift on the Hydraulic and Evaporative Performance Characteristics of a Common rail Diesel Fuel Injector Thiesel 2012
- Taskiran , O. O. , Ergeneman , M. Experimental Study on Diesel Spray Characteristics and Autoignition Process Journal of Combustion 2011 10.1155/2011/528126 2011
- EL-Hannouny , E. , Lee , T. , Farrell , P. , and Reitz , R. An Experimental and Numerical Study of Injector Behavior for HSDI Diesel Engines SAE Technical Paper 2003-01-0705 2003 10.4271/2003-01-0705
- Lee , J. , Bae , C. Application of JP-8 in a heavy duty diesel engine Fuel 90 1762 1770 2011
- Payri , F. , Bermudez , V. , Payri , R. , Salvador , F. J. The influence of cavitation on the internal flow and the spray characteristics in diesel injection nozzles Fuel 83 419 431 2004
- Tree , D. R. , Svensson , K. I. Soot process in compression ignition engines Progress in Energy and Combustion Science 33 272 309 2007
- Ladommatos , N. and Zhao , H. Engine Combustion Instrumentation and Diagnostics Society of Automotive Engineers, Inc. Warrendale, PA 978-0-7680-0665-0 2001 10.4271/R-264
- Fang , T. , Lee , C. Bio-diesel effects on combustion process in an HSDI diesel engine using advanced injection strategies Proceedings of the Combustion Institute 32 2785 2792 2009
- Lee , J. , Oh , H. , Bae , C. Combustion process of JP-8 and fossil Diesel fuel in a heavy duty diesel engine using two-color thermometry Fuel 102 264 273 2012
- Zhao , H. Advanced direct injection combustion engine technologies and development - Volume 2: Diesel engines Woodhead Publishing North America 2010