| dc.description.abstract | The primary objective of this study was to determine the capability of a CAT
engine controlled by an advanced combustion emission reduction technology
(ACERT) electronic control module to operate in a dual fuel mode. A CAT 6.6-liter
ACERT test engine was outfitted to operate on a hydrogen-diesel fuel mixture. A
continuous stream of hydrogen was infused into the intake air charge after the
turbocharger. At 50% of rated load, the addition of hydrogen, at three different
speeds (1300, 1800, and 2100 RPM), was examined. The hydrogen addition
varied from 0-60% of input energy. The maximum amount of hydrogen added
before knock occurred, for 1300, 1800, and 2100 RPM, was 54%, 46%, and 55%,
respectively. At 1300 RPM, the addition of hydrogen resulted in a decrease in
specific energy consumption (SEC) for all levels of hydrogen. For 1800 and 2100
RPM, the SEC improved only when hydrogen was added beyond 46% and 55%,
respectively. Emissions testing, while using hydrogen, showed a consistent
decrease in carbon dioxide (CO2) emissions and an increase in nitrogen oxides
(NOx) emissions for all test speeds. The carbon monoxide (CO) emissions showed
improvement at levels of hydrogen exceeding 40% for all test speeds. The
hydrocarbon (HC) emission did not vary during the addition of hydrogen. | en_US |
