Effects of Fuel Injection Strategy on HC Emissions in a Port-Fuel-Injection Engine During Fast Idle Sloan Automotive Laboratory, Massachusetts Institute of Technology

Format:

Conference/Event

Author/Creator:

Lang, Kevin R., author.

Conference Name:

Powertrain & Fluid Systems Conference and Exhibition (2006-10-16 : Toronto, Canada)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2006

Summary:

The interaction of intake port gas flow with the fuel spray in a port-fuel-injection engine is studied to see whether there are opportunities to facilitate the mixture preparation process and to improve the HC emissions through this interaction. The operating regime of interest is the fast idle period in a cold start. For single pulse injection, the HC emissions were not sensitive to injection details for closed-valve injection; emissions increased with open-valve injection. Then a split injection strategy was used in which the fuel was divided into two pulses. The first pulse was delivered during valve-closed; the second pulse was injected in the back flow period. Under cold-valve conditions, a small benefit (compared to close valve injection) was obtained with a second pulse fuel of 25%: 6% decrease in Specific HC emissions and 4.5% increase in the fuel delivery fraction. These benefits decreased with the increase of fuel in the second pulse because then much of the fuel will not be hit by the back flow

Notes:

Vendor supplied data

Publisher Number:

2006-01-3400

Access Restriction:

Restricted for use by site license