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

2007-01-4013

10/29/2007

Event
Powertrain & Fluid Systems Conference and Exhibition
Authors Abstract
Content
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.
Meta TagsDetails
DOI
https://doi.org/10.4271/2007-01-4013
Pages
11
Citation
Scaringe, R., and Cheng, W., "Influence of Intake Port Charge-Motion-Control-Valve on Mixture Preparation in a Port-Fuel-Injection Engine," SAE Technical Paper 2007-01-4013, 2007, https://doi.org/10.4271/2007-01-4013.
Additional Details
Publisher
Published
Oct 29, 2007
Product Code
2007-01-4013
Content Type
Technical Paper
Language
English