Investigating Combustion Enhancement and Emissions Reduction With the Addition of 2hD2 + OD2 to a SI Engine

Document Number: 2003-32-0011

Date Published: September 2003

Author(s):
Paul Henshaw - Univ. of Windsor
Tina D'Andrea - Univ. of Windsor
David Ting - Univ. of Windsor
Andrzej Sobiesiak - Univ. of Windsor

Abstract:
This research involved studying the effects of adding small amounts of hydrogen or hydrogen and oxygen to a gasoline-fuelled spark ignition (SI) engine at part load. The hydrogen and oxygen were added in a ratio of 2:1, mimicking the addition of water electrolysis products. It was found that the effects of hydrogen addition (is equivalent to?2.8% of the fuel by mass, is equivalent to 60% by volume) decreased as the fuel/air equivalence ratio approached \gf = 1. When operating at \gf \mL 0.8, the torque, indicated mean effective pressure (imep) and NO emissions increased and cycle-to-cycle variation decreased with hydrogen addition. The improvements in engine performance and increase in NO emissions were related to a faster burn rate shown by a decrease in burn duration with the addition of hydrogen. Further, the addition of hydrogen only and hydrogen and oxygen in a ratio of 2:1 were compared. The extra oxygen had little effect on engine performance other than an increase in NO exhaust concentration /mA500 ppm. Under the conditions tested, the power necessary to generate the hydrogen on board through electrolysis was greater than what was gained from the engine.

File Size: 212K
Product Status: In Stock

See other papers presented at Small Engine Technology Conference & Exhibition, September 2003, Madison, WI, USA, Session: Four-Stroke Engine Emissions (Part 1 of 2)

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