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Natural Gas for High Load Dual-Fuel Reactivity Controlled Compression Ignition (RCCI) in Heavy-Duty Engines

[+] Author Affiliations
N. Ryan Walker, Martin L. Wissink, Dan A. DelVescovo, Rolf D. Reitz

University of Wisconsin-Madison, Madison, WI

Paper No. ICEF2014-5620, pp. V001T03A016; 9 pages
doi:10.1115/ICEF2014-5620
From:
  • ASME 2014 Internal Combustion Engine Division Fall Technical Conference
  • Volume 1: Large Bore Engines; Fuels; Advanced Combustion; Emissions Control Systems
  • Columbus, Indiana, USA, October 19–22, 2014
  • Conference Sponsors: Internal Combustion Engine Division
  • ISBN: 978-0-7918-4616-2
  • Copyright © 2014 by ASME

abstract

Reactivity controlled compression ignition (RCCI) has been shown to be capable of providing improved engine efficiencies coupled with the benefit of low emissions via in-cylinder fuel blending. Much of the previous body of work has studied the use of gasoline as the premixed low-reactivity fuel. However, there is interest in exploring the use of alternative fuels in advanced combustion strategies. Due to the strong market growth of natural gas as a fuel in both mobile and stationary applications, a study on the use of methane for RCCI combustion was performed. Single cylinder heavy-duty engine experiments were undertaken to examine the operating range of the RCCI combustion strategy with methane/diesel fueling, and was compared against gasoline/diesel RCCI operation. The experimental results show a significant load extension of RCCI engine operation with methane/diesel fueling compared to gasoline/diesel fueling. For gasoline/diesel fueling, a maximum load of 6.9 bar IMEPg at CA50 = 0° aTDC and 7.0 bar IMEPg at CA50 = 4° aTDC was obtained without use of EGR. For methane/diesel fueling a maximum load of 15.4 bar IMEPg at CA50 = 0° aTDC and 17.3 bar IMEPg at CA50 = 4° aTDC was achieved, showing the effectiveness of the use of methane in extending the load limit for RCCI engine operation.

Copyright © 2014 by ASME

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