Application of an Imaging-based Diagnostic Technique to Quantify the Fuel Spray Variations in a Direct-Injection Spark-Ignition Engine Technical Center Rochester, Delphi Energy and Chassis Systems, Delphi Corporation

Format:

Conference/Event

Author/Creator:

Hung, David L.S., author.

Conference Name:

SAE 2003 World Congress & Exhibition (2003-03-03 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2003

Summary:

This paper presents an imaging-based diagnostic technique to quantify the pulse-to-pulse variability of macroscopic fuel spray characteristics for Direct-Injection Spark-Ignition (DISI) engine applications. The analysis approach is based on the construction of a spray ensemble image, reflecting the regions of probability of liquid presence for a set of images. Overlaying of an individual spray boundary on the probability-based ensemble image can further enhance the two-dimensional visualization of the pulse-to-pulse spray variations. Spray structures at three experimental conditions were examined: room ambient, and early and late injection conditions inside an optical engine. While the spray structure was observed to be considerably different for the three conditions, the magnitudes of variation of global spray shape and spray tip penetration distance were found to be of similar order.This methodology is capable of capturing the magnitude of pulse-to-pulse variability in penetration and spray geometry and displaying the variations in a two-dimensional representation. It is a useful diagnostic tool for fuel injector spray evaluation and can be used in support of the fuel injector development and application process for DISI engines

Notes:

Vendor supplied data

Publisher Number:

2003-01-0062

Access Restriction:

Restricted for use by site license