This paper experimentally investigates the effect of water injection in the intake manifold on a naturally aspirated, single cylinder, Gasoline Direct Injection engine to determine the combustion and emissions performance with combustion knock mitigation. The endeavor of the current study is to use water injection to attain the optimum combustion phasing without knocking. Further elevated intake air temperature tests were conducted to observe the effect of water injection with respect to combustion and emissions. Experiments were carried out at medium load condition (800 kPa NIMEP, 1500 RPM) at intake air temperatures between 30–90° C in 20° C increments. Two fuels, an 87 AKI and a 93 AKI were used in this study. Baseline tests were undertaken with the high-octane fuel (93 AKI) to achieve optimal combustion phasing corresponding to Maximum Brake Torque (MBT) without water injection. Water injection was utilized for the low octane fuel to achieve combustion phasing of 8–10° ATDC and within the controlled knock limit. Combustion phasing was achieved by controlling the ignition timing, water injection quantity and timing to the knock threshold. The results showed that water injection and the resultant charge cooling mitigates combustion knock and an optimum combustion phasing based on indicated fuel conversion efficiency is achieved with a water to fuel ratio of 0.6. Water injection reduces the NOx emissions while achieving better indicated thermal efficiency compared to the baseline tests. A detailed comparison is presented on the combustion phasing, indicated thermal efficiency, burn durations, HC, NOx and PN emissions in this paper.
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ASME 2017 Internal Combustion Engine Division Fall Technical Conference
October 15–18, 2017
Seattle, Washington, USA
Conference Sponsors:
- Internal Combustion Engine Division
ISBN:
978-0-7918-5831-8
PROCEEDINGS PAPER
Experimental Investigation of Water Injection Technique in Gasoline Direct Injection Engine Available to Purchase
Niranjan Miganakallu,
Niranjan Miganakallu
Michigan Technological University, Houghton, MI
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Jeffrey D. Naber,
Jeffrey D. Naber
Michigan Technological University, Houghton, MI
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Sandesh Rao,
Sandesh Rao
Michigan Technological University, Houghton, MI
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William Atkinson,
William Atkinson
Nostrum Energy LLC, Houghton, MI
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Sam Barros
Sam Barros
Nostrum Energy LLC, Houghton, MI
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Niranjan Miganakallu
Michigan Technological University, Houghton, MI
Jeffrey D. Naber
Michigan Technological University, Houghton, MI
Sandesh Rao
Michigan Technological University, Houghton, MI
William Atkinson
Nostrum Energy LLC, Houghton, MI
Sam Barros
Nostrum Energy LLC, Houghton, MI
Paper No:
ICEF2017-3619, V001T03A013; 10 pages
Published Online:
November 30, 2017
Citation
Miganakallu, N, Naber, JD, Rao, S, Atkinson, W, & Barros, S. "Experimental Investigation of Water Injection Technique in Gasoline Direct Injection Engine." Proceedings of the ASME 2017 Internal Combustion Engine Division Fall Technical Conference. Volume 1: Large Bore Engines; Fuels; Advanced Combustion. Seattle, Washington, USA. October 15–18, 2017. V001T03A013. ASME. https://doi.org/10.1115/ICEF2017-3619
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