Common Rail fuel injection equipment offers to diesel combustion a flexible choice of injection timing, injection pressure and fuel quantity with one or more injection events. This paper explores the spray characteristics for rail pressures of 200 to 1600 bar. A novel technique has been developed to capture shadowgraphs of sprays on video from consecutive injections at pseudo framing rates of 25000 frames/sec.Pulse laser illuminated shadowgraphy was employed to illuminate and display the diesel sprays in an experimental engine with optical access. Spray images were recorded on video at different time intervals from a number of consecutive injections from the start of injection using an electronic auto incrementing sequencer. The sprays formed by a 5 hole and a single hole VCO nozzle were recorded to quantify the influence of rail pressures and fuelling on spray characteristics.A number of new techniques have been developed and used to characterize the sprays from Lucas Diesel Common Rail (LDCR) injectors. Results are presented on evolution of sprays with time, spray tip and liquid core penetrations, cyclic variations and cone angles. The spray image results show good shot-to-shot consistency from the LDCR injector used in the study. The new techniques are being used to maximize the benefits from the LDCR system in future HSDI engines.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Video Imaging and Analysis of Common Rail Sprays in an Optical Engine Using Shadowgraphy Technique


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2000 World Congress ; 2000



    Publication date :

    2000-03-06




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Video imaging and analysis of common rail sprays in an optical engine using shadowgraphy technique

    Kunkulagunta,K.R. / Delphi Diesel Systems,US | Automotive engineering | 2000


    PDA Characterisation of Dense Diesel Sprays Using a Common-Rail Injection System

    Crua, Cyril / Kennaird, Dave / Lacoste, Julien et al. | SAE Technical Papers | 2003


    PDA characterisation of dense diesel sprays using a common-rail injection system

    Lacoste,J. / Crue,C. / Heikal,M. et al. | Automotive engineering | 2003


    Evaporating Diesel Spray Visualization using a Double-pass Shadowgraphy/Schlieren imaging

    García, José M. / Pastor, José M. / Pastor, José V. et al. | SAE Technical Papers | 2007


    Evaporating diesel spray visualization using a double-pass shadowgraphy/schlieren imaging

    Pastor,J.V. / Garcia,J.M. / Pastor,J.M. et al. | Automotive engineering | 2007