0
TECHNICAL PAPERS: Internal Combustion Engines

The Effects of High-Pressure Injection on a Compression–Ignition, Direct Injection of Natural Gas Engine

[+] Author and Article Information
G. P. McTaggart-Cowan1

Department of Mechanical Engineering, University of British Columbia, 2054-6250 Applied Science Lane, Vancouver, B.C., V6T 1Z4, Canadag.mctaggart-cowan@lboro.ac.uk

H. L. Jones, S. N. Rogak, W. K. Bushe, P. G. Hill

Department of Mechanical Engineering, University of British Columbia, 2054-6250 Applied Science Lane, Vancouver, B.C., V6T 1Z4, Canada

S. R. Munshi

 Westport Innovations, Inc., 1691 W. 75th Avenue, Vancouver, B.C., V6P 6P2, Canada

1

Corresponding author.

J. Eng. Gas Turbines Power 129(2), 579-588 (Sep 28, 2006) (10 pages) doi:10.1115/1.2432894 History: Received September 28, 2005; Revised September 28, 2006

This study investigated the effects of injection pressure on the performance and emissions of a pilot-ignited, late-cycle direct-injected natural gas fueled heavy-duty engine. The experiments, conducted on a single-cylinder engine, covered a wide range of engine speeds, loads, and exhaust gas recirculation fractions. The injection pressure was varied at each operating condition while all other parameters were held constant. At high loads, increasing the injection pressure substantially reduced particulate matter and CO emissions, with small increases in NOx and no significant effect on hydrocarbon emissions or fuel consumption. At low loads, injection pressure had no significant impact on either emissions or performance. At high loads, higher injection pressures consistently reduced both the number density and the size of particles in the exhaust stream. Injection pressure had reduced effects at increased engine speeds.

FIGURES IN THIS ARTICLE
<>
Copyright © 2007 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 2

Injection pressure and operating condition influences on NOx emissions (g∕GikWhr)

Grahic Jump Location
Figure 3

Injection pressure and operating condition influences on CO emissions (g∕GikWhr)

Grahic Jump Location
Figure 4

Injection pressure and operating condition influences on HC emissions (g∕GikWhr)

Grahic Jump Location
Figure 5

Injection pressure and operating condition influences on PM emissions (g∕GikWhr)

Grahic Jump Location
Figure 6

Effect of injection pressure at a single operating condition (1200rpm, 13.5bar GIMEP, ϕ 0.6)

Grahic Jump Location
Figure 7

Injection pressure and operating condition influences on combustion duration (degree CA)

Grahic Jump Location
Figure 8

Effect of injection pressure on cylinder pressure (left) and heat-release rate (right) at 800rpm, 3bar GIMEP, ϕ 0.25

Grahic Jump Location
Figure 9

Effect of injection pressure on cylinder pressure (left) and heat-release rate (right) at 1200rpm, 13.5bar GIMEP, ϕ 0.6

Grahic Jump Location
Figure 10

Effect of injection pressure on particle size distributions, at 800rpm, 3bar GIMEP, ϕ 0.25

Grahic Jump Location
Figure 11

Effect of injection pressure on particle size distributions, at 800rpm, 13.5bar GIMEP, ϕ 0.6

Grahic Jump Location
Figure 12

Effect of injection pressure on particle size distributions, at 1600rpm, 13.5bar GIMEP, ϕ 0.6

Grahic Jump Location
Figure 1

Injection pressure and operating condition influences on GISFC (g∕GikWhr)

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In