Reducing utility engine exhaust emissions with a thermal reactor

Gary R. Simons, David B. Kittelson

Research output: Contribution to journalConference articlepeer-review


A test reactor was designed for a 6.7 kW, 303 cc, single cylinder, air cooled, gasoline fueled engine. The reactor was very efficient at hydrocarbon (HC) and carbon monoxide (CO) reductions - with up to 99.9 and 98.6% removed, respectively. It had no effect on oxides of nitrogen (NOx) emissions. With the reactor, the engine met the California Air Resources Board (ARB) proposed Tier II emission standards. A factorial test was used to determine that A/F ratio and air injection rate significantly affected CO reduction efficiency whereas air injection location, ignition timing, and engine load did not. Relationships were established between CO reduction, air injection rate, and reactor core temperature.

Original languageEnglish (US)
JournalSAE Technical Papers
StatePublished - 1995
EventSmall Engine Technology Conference - Milwaukee, WI, United States
Duration: Sep 13 1995Sep 15 1995


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