Browse Publications Technical Papers 2006-01-3246
2006-10-16

An HCCI Engine Fuelled with Iso-octane and Ethanol 2006-01-3246

This paper investigates Homogeneous Charge Compression Ignition (HCCI) combustion on an engine that is fuelled with ethanol, iso-octane, and ethanol/iso-octane. The engine is a four-stroke three cylinder indirect injection type diesel engine converted to a single cylinder HCCI operation. In order to clarify the effects of fuel chemistry on HCCI combustion, the trials were done at a constant engine speed, a fixed initial charge temperature and engine coolant temperature. The HCCI engine was fuelled with a lean mixture of air and fuel (ethanol, iso-octane or mixture of ethanol/iso-octane).
The engine performance parameters studied here include indicated mean effective pressure (IMEP) and thermal efficiency. Heat-release rate (HRR) analysis was done to determine the effect of fuels on combustion on-set. The experimental results demonstrate that the addition of iso-octane to ethanol retards the on-set of combustion and subsequently leads to a reduction of the IMEP and thermal efficiency. For a particular fuel, the on-set of combustion depends closely on the intake charge temperature (as reported by several other researchers) and any increase in the initial charge temperature leads to advances in the on-set of combustion. Furthermore, the experimental results demonstrate that operating the engine on a lean charge reduces engine-out NOx emissions significantly.

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

Fuel Composition Effects at Constant RON and MON in an HCCI Engine Operated with Negative Valve Overlap

2006-01-3275

View Details

TECHNICAL PAPER

Dual Fuel Diesel Combustion with Premixed Ethanol as the Main Fuel

2014-01-2687

View Details

TECHNICAL PAPER

Analysis of Surrogate Fuels Effect on Ignition Delay and Low Temperature Reaction during Partially Premixed Combustion

2013-01-0903

View Details

X