1983-02-01

A Single Cylinder Engine Study of Lean Supercharged Operation for Spark Ignition Engines 830146

A comprehensive test program was conducted using a single cylinder CFR engine to evaluate lean supercharged operation (LSO) of the spark ignition engine for improved efficiency. The intake manifold pressure and temperature and the exhaust pressure were controlled to simulate the addition of a turbocharger to the engine.
Results of the experimental work indicated that LSO has the potential of improved engine efficiency and NOx emissions comparable to, or lower than, the naturally aspirated engine. For equal power output from the engine, efficiency increases of 14% were accompanied by reductions in Brake Specific NOx (BSNOx) emissions of approximately 76%. For a case of equal BSNOx emissions, an efficiency improvement of 6.4 points (over 40%) was observed. For operation at realistic lean supercharged conditions, the hydrocarbon and carbon monoxide emissions were not significantly different than those for the naturally aspirated engine. Exhaust energy estimates for the lean supercharged conditions tested indicated that sufficient exhaust energy is available to power a typical automotive type turbocharger.

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

A Study of Efficiency and Emissions for a 4-Stroke SI and a CAI Engine with EEGR and Light Boost

2006-32-0042

View Details

TECHNICAL PAPER

An Investigation of the Effect of Fuel-Air Mixedness on the Emissions from an HCCI Engine

2002-01-1758

View Details

TECHNICAL PAPER

A High Dilution Stoichiometric Combustion Concept Using a Wide Variable Spark Gap and In-Cylinder Air Injection in Order to Meet Future CO2 Requirements and World Wide Emission Regulations

2001-01-0246

View Details

X