Browse Publications Technical Papers 2006-01-3411
2006-10-16

The Effects of Reingested Particles on Emissions from a Heavy-Duty Direct Injection of Natural Gas Engine 2006-01-3411

The use of exhaust gas recirculation (EGR) to control NOx emissions from direct-injection engines results in the reintroduction of exhaust particulate matter (PM) into the intake manifold. The influence of this recirculated PM on emissions from a pilot-ignited direct injection of natural gas engine was studied by installing a filter in the EGR system. Comparison tests at fixed engine conditions were conducted to identify differences between filtered and unfiltered EGR. No significant variations in gaseous or PM mass emissions were detected. This indicates that the recirculated PM is not contributing substantially to the increases in PM mass emissions commonly observed with EGR. Reductions in black carbon and ultra-fine particle exhaust concentrations in the exhaust were observed at the highest EGR fractions with the filter installed. This reduction suggests that with unfiltered EGR a fraction of the recirculated carbonaceous particles may be passing unreacted through the combustion chamber.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Autoignition and Emission Characteristics of Gaseous Fuel Direct Injection Compression Ignition Combustion

2007-01-0131

View Details

TECHNICAL PAPER

Premixed-compression-ignition natural gas engine

2000-05-0087

View Details

TECHNICAL PAPER

Particle Emission Measurements in a SI CNG Engine Using Oils with Controlled Ash Content

2019-01-0053

View Details

X