Browse Publications Technical Papers 2014-01-1318
2014-04-01

Experimental Demonstration of RCCI in Heavy-Duty Engines using Diesel and Natural Gas 2014-01-1318

Premixed combustion concepts like PCCI and RCCI have attracted much attention, since these concepts offer possibilities to reduce engine out emissions to a low level, while still achieving good efficiency. Most RCCI studies use a combination of a high-cetane fuel like diesel, and gasoline as low-cetane fuel. Limited results have been published using natural gas as low-cetane fuel; especially full scale engine results. This study presents results from an experimental study of diesel-CNG RCCI operation on a 6 cylinder, 8 l heavy duty engine with cooled EGR. This standard Tier4f diesel engine was equipped with a gas injection system, which used single point injection and mixed the gaseous fuel with air upstream of the intake manifold. For this engine configuration, RCCI operating limits have been explored. In the 1200-1800 rpm range, RCCI operation with Euro-VI engine out NOx and soot emissions was achieved between 2 and 9 bar BMEP without EGR. Corresponding hydrocarbon levels were high, but exhaust temperature levels hold promise for a suitable reduction through catalytic aftertreatment. Thermal efficiency was comparable to or better than diesel operation. In the load ranges tested, gas Methane Number (MN) variations between 70 and 100 have only a small effect on RCCI performance.

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

Effect of Relative Mixture Strength on Performance of Divided Chamber ‘Avalanche Activated Combustion’ Ignition Technique in a Heavy Duty Natural Gas Engine

2014-01-1327

View Details

TECHNICAL PAPER

An experimental investigation on combustion and engine performance and emissions of a methane-gasoline dual-fuel optical engine

2014-01-1329

View Details

TECHNICAL PAPER

Knock Limitations of Methane-Air Mixtures in a Turbocharged Dual-Fuel Engine

870794

View Details

X