Meeting future exhaust emission and fuel consumption standards for passenger cars will require refinements in how the combustion process is carried out in spark ignition engines. A direct injection system reduces fuel consumption under road load cruising conditions, and stratified charge of the air-fuel mixture is particularly effective for lean combustion.This paper describes an approach to improve combustion stability for direct fuel injection gasoline engines. Effects of spray characteristics (spray pattern and diameter) and air flow motion on the combustion stability were investigated. Spray patterns were observed by the laser sheet scattering method and 3-dimensional laser doppler velocimetry. Mixture behavior in the combustion chamber was observed by the laser-induced fluorescence method using an excimer laser and single cylinder optical engine. It was found that the spray pattern for a pressurized condition affects the combustion stability and smoke generation. Spray having both high and low speed particles leads to mixture stratification around the spark plug and reduced the fuel impingement on the piston cavity. The engine test results showed improvement of combustion stability and smoke reduction under lean operation.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Stability Improvement of Direct Fuel Injection Engine under Lean Combustion Operation


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Fall Fuels and Lubricants Meeting and Exposition ; 1998



    Publication date :

    1998-10-19




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Stability improvement of direct fuel injection engine under lean combustion operation

    Nogi,T. / Shiraishi,T. / Nakayama,Y. et al. | Automotive engineering | 1998


    Combustion stability improvement with turbulence control by air injection for a lean-burn SI engine

    Suzuki, Takanori / Lehrheuer, B. / Ottenwälder, T. et al. | TIBKAT | 2019


    Combustion stability improvement with turbulence control by air injection for a lean-burn SI engine

    Suzuki, Takanori / Lehrheuer, Bastian / Ottenwälder, Tamara et al. | Springer Verlag | 2019


    Lean burn combustion influence on stratified charge ethanol direct injection engine

    Franco, Rafael Lara / Junior, Carlos Alberto Gomes / Da Costa, Roberto Berlini Rodrigues et al. | British Library Conference Proceedings | 2016


    Lean Burn Combustion Influence on Stratified Charge Ethanol Direct Injection Engine

    Gomes Júnior, Carlos Alberto / Rodrigues Filho, Fernando Antonio / Franco, Rafael Lara et al. | SAE Technical Papers | 2016