The impact of minutely oxygen-enriched air on spark-ignition (SI) engine combustion was studied by obtaining engine performance measurements and investigating in-cylinder reactions. This study was initiated to determine if development of a new air-cleaner method, which may employ molecular sieve or membrane technology to slightly increase the oxygen concentration in the inducted air, is beneficial for engine operations.The air introduced into a single-cylinder SI engine was added with oxygen to produce oxygen concentrations of 21, 22 and 23%. Some results from engine tests performed with the oxygen enrichment are: The heat release lag, cycle variation and combustion period decreased; substantial reduction of emissions of unburned hydrocarbon emission and noticeable decrease of carbon monoxide were observed; and the brake thermal efficiency and engine output increased.In order to gain a better understanding of in-cylinder reactions and to help explain the findings obtained from the performance/emission test with oxygen enrichment, high-speed spectral IR digital imaging was performed in an SI engine. It was found that addition of small amounts of oxygen into the fuel/air mixture noticeably increased thermal radiation (due to higher temperature) from the reaction zone throughout the combustion period. This is considered to play a role in reducing UHC and CO emissions as well as increasing thermal efficiency.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    A Spark Ignition Engine Operated by Oxygen Enriched Air


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Fuels & Lubricants Meeting & Exposition ; 1992



    Publication date :

    1992-10-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    A spark ignition engine operated by oxygen enriched air

    Kajitani,S. / Sawa,N. / McComiskey,T. et al. | Automotive engineering | 1992


    Performance of a spark ignition engine fueled by natural gas using oxygen enriched air

    Detuncq,B. / Williams,J. / Guernier,C. et al. | Automotive engineering | 1988


    Partial-load and Start-up Operations of Spark-ignition Engine with Oxygen Enriched Air

    Clasen, E. / Rhee, K.T. / Campbell, S. et al. | SAE Technical Papers | 1993


    Performance of a Spark Ignition Engine Fueled by Natural Gas Using Oxygen Enriched Air

    Detuncq, B. / Guernier, C. / Williams, J. et al. | SAE Technical Papers | 1988


    A timed fuel-injection spark-ignition engine operated by methanol fuels

    Kajitani,S. / Sawa,N. / Rhee,K.T. et al. | Automotive engineering | 1990