Hydrocarbon emissions during cold start and subsequent engine warm-up constitute the majority of hydrocarbons emitted during an FTP test. Reducing HC emissions during this portion of the test is necessary to meet current and future HC emissions regulations. This paper summarizes the results of a study which quantified the influence of fuel injector configuration and engine calibration on HC emissions prior to catalyst light-off, in a contemporary four-valves-per-cylinder engine. The fuel-injector parameters investigated included dual versus single spray, air-assist versus non-air-assist, and different spray characteristics (cone angle, droplet size). Control parameters investigated included injection timing, air-fuel ratio, and spark timing. Design and calibration merits were assessed according to combustion stability, cumulative hydrocarbon emissions during cold start and warm-up, and catalyst light-off time.For all injector configurations tested, closed-intake-valve injection always produced more favorable results than open-intake-valve injection. In addition, when fuel was injected on closed intake valves, neither the use of dual sprays nor air-assist provided significant benefits.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Fuel Injection Strategies to Minimize Cold-Start HC Emission


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    International Congress & Exposition ; 1997



    Erscheinungsdatum :

    1997-02-24




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Fuel injection strategies to minimize cold-start HC emissions

    Fischer,H.C. / Brereton,G.J. / Univ.Kaiserslautern,DE et al. | Kraftfahrwesen | 1997


    Fuel Injection Strategies to Minimize Cold-Start HC Emissions

    Fischer, H. C. / Brereton, G. J. / SAE | British Library Conference Proceedings | 1997


    Port-Fuel-Injection Gasoline Engine Cold Start Fuel Calibration

    Tagomori, Mauro K. / Henein, Naeim A. / Luan, Yunfei | SAE Technical Papers | 2006


    GDi Cold Start Emission Reduction with Heated Fuel

    Kabasin, Daniel / Haller, James / Kazour, Joseph et al. | SAE Technical Papers | 2016


    Cold Start HC Emission Reduction Using Targeted Fuel Heating

    V, Avaneesh Athreya / M, Himabindu / Teja, Ravi et al. | SAE Technical Papers | 2022