The effects of the directed port flow produced by a Charge-Motion-Control-Valve (CMCV) on mixture preparation in a Port-Fuel-Injection engine were assessed under conditions typical of fast idle in a cold start process. The port fuel was found to comprise two components: a “valve” puddle (at the vicinity of the valve) that built up quickly, and that was mainly responsible for the delivery of the fuel to the cylinder charge; a “port” puddle located significantly upstream. The latter was mainly created by the reverse back flow process and built up slowly. Although the fuel amounts in these two components were roughly the same, the latter did not significantly interact with the fuel transport to the cylinder charge. The CMCV only weakly affected the purging or filling time of the valve puddle, hence the dynamics of the fuel delivery process was not materially affected. The results were also confirmed by directly measuring the transient response of the fuel delivery to the charge with a step change in the injection duration.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Influence of Intake Port Charge-Motion-Control-Valve on Mixture Preparation in a Port-Fuel-Injection Engine


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    Powertrain & Fluid Systems Conference and Exhibition ; 2007



    Publication date :

    2007-10-29




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Influence of intake port charge-motion-control-valve on mixture preparation in a port-fuel-injection engine

    Scaringe,R.J. / Cheng,W.K. / Massachusetts Inst.of Technol.,US | Automotive engineering | 2007


    Influence of Intake Port Charge-Motion-Control-Valve on Mixture Preparation in a Port-Fuel-Injection Engine

    Scaringe, R.J. / Cheng, W.K. / Society of Automotive Engineers | British Library Conference Proceedings | 2007


    Mixture preparation mechanisms on a port fuel injection engine

    Costanzo,V.S. / Heywood,J.B. / Massachusetts Inst.of Technology,Cambridge,US | Automotive engineering | 2005


    Measurements of Intake Port Fuel/Air Mixture Preparation

    Holthaus, B. E. / Drallmeier, J. A. / Wagner, R. M. | SAE Technical Papers | 1997


    Measurements of intake port fuel/air mixture preparation

    Holthaus,B.E. / Wagner,R.M. / Drallmeier,J.A. et al. | Automotive engineering | 1997