Emission rates of benzene-soluble matter (tar), benzo (a) pyrene (BaP), and benz (a) anthracene (BaA) were determined for gasoline engines and automobiles in simulated city driving, and for a diesel engine in simulated city bus operation.A study of the effects of operating conditions and fuel factors indicated that for minimum exhaust emission of polynuclear aromatic hydrocarbons, engines should be operated with minimum lubricating oil in the combustion chamber or exhaust system, maximum air/fuel ratio, and minimum aromatics (especially polynuclear aromatics) in the fuel.On a concentration basis, emissions of BaP and BaA from gasoline engines were greatest during decelerations, and on a mass emission basis were greatest during accelerations.For a group of 25 cars, the average BaP emission rates were 6.6 ug/M3 exhaust or 169 ug/gal gasoline. BaA concentrations were approximately four times higher. Tar emission was approximately 0.2 gm/mile.Emission control systems for reducing volatile hydrocarbons and carbon monoxide in exhaust also reduced polynuclear aromatics in exhaust.Emissions from a diesel engine on a city bus cycle were 62 ug BaP/gal fuel, and 1.4 gm tar/mile.Emission rates of benzene-soluble matter (tar), benzo (a) pyrene (BaP), and benz (a) anthracene (BaA) were determined for gasoline engines and automobiles in simulated city driving, and for a diesel engine in simulated city bus operation.A study of the effects of operating conditions and fuel factors indicated that for minimum exhaust emission of polynuclear aromatic hydrocarbons, engines should be operated with minimum lubricating oil in the combustion chamber or exhaust system, maximum air/fuel ratio, and minimum aromatics (especially polynuclear aromatics) in the fuel.On a concentration basis, emissions of BaP and BaA from gasoline engines were greatest during decelerations, and on a mass emission basis were greatest during accelerations.For a group of 25 cars, the average BaP emission rates were 6.6 ug/M3 exhaust or 169 ug/gal gasoline. BaA concentrations were approximately four times higher. Tar emission was approximately 0.2 gm/mile.Emission control systems for reducing volatile hydrocarbons and carbon monoxide in exhaust also reduced polynuclear aromatics in exhaust.Emissions from a diesel engine on a city bus cycle were 62 ug BaP/gal fuel, and 1.4 gm tar/mile.Emission rates of benzene-soluble matter (tar), benzo (a) pyrene (BaP), and benz (a) anthracene (BaA) were determined for gasoline engines and automobiles in simulated city driving, and for a diesel engine in simulated city bus operation.A study of the effects of operating conditions and fuel factors indicated that for minimum exhaust emission of polynuclear aromatic hydrocarbons, engines should be operated with minimum lubricating oil in the combustion chamber or exhaust system, maximum air/fuel ratio, and minimum aromatics (especially polynuclear aromatics) in the fuel.On a concentration basis, emissions of BaP and BaA from gasoline engines were greatest during decelerations, and on a mass emission basis were greatest during accelerations.For a group of 25 cars, the average BaP emission rates were 6.6 ug/M3 exhaust or 169 ug/gal gasoline. BaA concentrations were approximately four times higher. Tar emission was approximately 0.2 gm/mile.Emission control systems for reducing volatile hydrocarbons and carbon monoxide in exhaust also reduced polynuclear aromatics in exhaust.Emissions from a diesel engine on a city bus cycle were 62 ug BaP/gal fuel, and 1.4 gm tar/mile.Emission rates of benzene-soluble matter (tar), benzo (a) pyrene (BaP), and benz (a) anthracene (BaA) were determined for gasoline engines and automobiles in simulated city driving, and for a diesel engine in simulated city bus operation.A study of the effects of operating conditions and fuel factors indicated that for minimum exhaust emission of polynuclear aromatic hydrocarbons, engines should be operated with minimum lubricating oil in the combustion chamber or exhaust system, maximum air/fuel ratio, and minimum aromatics (especially polynuclear aromatics) in the fuel.On a concentration basis, emissions of BaP and BaA from gasoline engines were greatest during decelerations, and on a mass emission basis were greatest during accelerations.For a group of 25 cars, the average BaP emission rates were 6.6 ug/M3 exhaust or 169 ug/gal gasoline. BaA concentrations were approximately four times higher. Tar emission was approximately 0.2 gm/mile.Emission control systems for reducing volatile hydrocarbons and carbon monoxide in exhaust also reduced polynuclear aromatics in exhaust.Emissions from a diesel engine on a city bus cycle were 62 ug BaP/gal fuel, and 1.4 gm tar/mile.


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    Titel :

    Polynuclear Aromatic Hydrocarbon Emissions from Automotive Engines


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    Mid-Year Meeting ; 1970



    Erscheinungsdatum :

    01.02.1970




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Mechanisms of Polynuclear Aromatic Hydrocarbon Emissions from Automotive Engines

    Laity, J. L. / Malbin, M. D. / Doty, W. I. et al. | SAE Technical Papers | 1973


    Automotive Emissions of Polynuclear Aromatic Hydrocarbons

    Gross, George P. | SAE Technical Papers | 1974


    Note on Unburned Hydrocarbon Emissions from Automotive Engines

    F. Fendell / S. Fink / P. Feldman | NTIS | 1981


    The Effect of Unleaded Fuel Composition on Polynuclear Aromatic Hydrocarbon Emissions

    Newhall, H. K. / Ballinger, P. R. / Jentoft, R. E. | SAE Technical Papers | 1973