Browse Publications Technical Papers 2014-01-1309
2014-04-01

Impact of Cetane Number on Combustion of a Gasoline-Diesel Dual-Fuel Heavy-Duty Multi-Cylinder Engine 2014-01-1309

Dual-fuel combustion using liquid fuels with differing reactivity has been shown to achieve low-temperature combustion with moderate peak pressure rise rates, low soot and NOx emissions, and high indicated efficiency. Varying fractions of gasoline-type and diesel-type fuels enable operation across a range of low- and mid-load operating conditions. Expanding the operating range to cover the full operating range of a heavy-duty diesel engine, while maintaining the efficiency and emissions benefits, is a key objective. With dissimilar properties of the two utilized fuels lying at the heart of the dual-fuel concept, a tool for enabling this load range expansion is altering the properties of the two test fuels - this study focuses on altering the reactivity of the diesel fuel component.
Tests were conducted on a 13L six-cylinder heavy-duty diesel engine modified to run dual-fuel combustion with port gasoline injection to supplement the direct diesel injection. A single diesel injection strategy was used across a range of operating points. Diesel fuels with varying cetane number were tested, including a ULSD certification fuel; a low cetane, low aromatics, high volatility fuel from the Fuels for Advanced Combustion Engines matrix (FACE #1); and a high cetane Fischer-Tropsch diesel fuel.
Decreasing diesel fuel cetane number reduces overall mixture reactivity and extends the mixing time prior to onset of combustion, reducing soot emissions and shifting the overall operating window to a higher load range. Stable operation with high gasoline fractions across a wider load range is enabled by the high cetane fuel.

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.
We also recommend:
TECHNICAL PAPER

The Possibility of Gas to Liquid (GTL) as a Fuel of Direct Injection Diesel Engine

2002-01-1706

View Details

JOURNAL ARTICLE

Combustion Improvement of Diesel Engine by Alcohol Addition - Investigation of Port Injection Method and Blended Fuel Method

2011-01-0336

View Details

TECHNICAL PAPER

Effect of Different Fuels Properties on Emissions and Performance of a Light Duty Four-Cylinder Diesel Engine Under Premixed Combustion

2014-01-2674

View Details

X