The effects of deposits on spray behaviors of a gasoline direct injector

The effects of deposits on spray behaviors of a gasoline direct injector The nozzle of the fuel injector for the Gasoline Direct Injection (GDI) engine exposing to high temperature combustion gas and soot makes it easier for deposits to accumulate on. Deposit formation in the injector orifice can both restrict the fuel flow and alter the spray characteristics of the injectors, and high levels of flow restriction and any level of spray distortion cannot be adequately controlled electronically. The decrease of the fuel flow rate results in the decrease of power, and the fuel spray pattern distortion influences combustion quality, which can lead to loss in power and fuel economy, as well as the increase of exhaust emissions. The present paper reports experimental investigation to the effects of deposits on spray behaviors of a six-hole GDI injector. The flow rate, spray angle, penetration distance and particle sizes of the sprays of several new GDI injectors at different injection pressure are compared with these of the injectors covered by deposits that have been used in a vehicle for 58 thousand kilometers. The results show that the flow rates of used injectors decrease by about 10%, the spray angles enlarge a little, and the penetration distance slightly decreases. Besides, Scanning Electron Microscope (SEM) photographs of the orifice holes of used injectors were used to help to understand the results. Furthermore, the effect mechanism of deposits at different location on the GDI injector properties has been analyzed to deepen the comprehension on experimental findings. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Fuel Elsevier

The effects of deposits on spray behaviors of a gasoline direct injector

Loading next page...
 
/lp/elsevier/the-effects-of-deposits-on-spray-behaviors-of-a-gasoline-direct-hwjqS6wAmp
Publisher
Elsevier
Copyright
Copyright © 2016 Elsevier Ltd
ISSN
0016-2361
D.O.I.
10.1016/j.fuel.2016.04.067
Publisher site
See Article on Publisher Site

Abstract

The nozzle of the fuel injector for the Gasoline Direct Injection (GDI) engine exposing to high temperature combustion gas and soot makes it easier for deposits to accumulate on. Deposit formation in the injector orifice can both restrict the fuel flow and alter the spray characteristics of the injectors, and high levels of flow restriction and any level of spray distortion cannot be adequately controlled electronically. The decrease of the fuel flow rate results in the decrease of power, and the fuel spray pattern distortion influences combustion quality, which can lead to loss in power and fuel economy, as well as the increase of exhaust emissions. The present paper reports experimental investigation to the effects of deposits on spray behaviors of a six-hole GDI injector. The flow rate, spray angle, penetration distance and particle sizes of the sprays of several new GDI injectors at different injection pressure are compared with these of the injectors covered by deposits that have been used in a vehicle for 58 thousand kilometers. The results show that the flow rates of used injectors decrease by about 10%, the spray angles enlarge a little, and the penetration distance slightly decreases. Besides, Scanning Electron Microscope (SEM) photographs of the orifice holes of used injectors were used to help to understand the results. Furthermore, the effect mechanism of deposits at different location on the GDI injector properties has been analyzed to deepen the comprehension on experimental findings.

Journal

FuelElsevier

Published: Sep 15, 2016

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off