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Dissertation/Thesis Abstract

The Impact of Water Injection on Spark Ignition Engine Performance under High Load Operation
by Worm, Jeremy, Ph.D., Michigan Technological University, 2017, 295; 10684513
Abstract (Summary)

An experimental effort has been completed in which water injection was investigated as a means of enabling increases in engine output and high load efficiency. Water was injected into the intake port of a direct fuel injected, 4-cylinder, boosted engine with dual independent variable valve timing. The water was shown to increase volumetric efficiency and decrease the onset of knock which in turn enable more optimal combustion phasing. Both of these affects resulted increases in load of up to 5.5% at the same manifold pressure as the baseline case. The advancement of combustion phasing, combined with elimination of fuel enrichment resulted in an increase in full load thermal efficiency of up to 35%. Analysis is provided around these affects, as well as the phase transformation of water throughout the engine cycle.

Indexing (document details)
Advisor: Naber, Jeffrey D.
Commitee: Blough, Jason, Robinette, Darrell, Wagner, Scott
School: Michigan Technological University
Department: Mechanical Engineering-Engineering Mechanics
School Location: United States -- Michigan
Source: DAI-B 79/07(E), Dissertation Abstracts International
Subjects: Thermodynamics, Mechanical engineering, Energy
Keywords: Combustion, Efficiency, Engines, High output, Knock, Water injection
Publication Number: 10684513
ISBN: 978-0-355-63071-8
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