Browse Publications Technical Papers 2006-01-1106
2006-04-03

Predicting the Behavior of a Hydrogen-Enhanced Lean-Burn SI Engine Concept 2006-01-1106

This paper explores the modeling of a lean boosted engine concept. Modeling provides a useful tool for investigating different parameters and comparing resultant emissions and fuel economy performance. An existing architectural concept has been tailored to a boosted hydrogen-enhanced lean-burn SI engine. The simulation consists of a set of Matlab models, part physical and part empirical, which has been developed to simulate a working engine.
The model was calibrated with production engine data and experimental data taken at MIT. Combustion and emissions data come from a single cylinder research engine and include changes in air/fuel ratio, load and speed, and different fractions of the gasoline fuel reformed to H2 and CO. The outputs of the model are brake specific NOx emissions and brake specific fuel consumption maps along with cumulative NOx emissions and fuel economy for urban and highway drive cycles.
Model results closely match production engine performance data for naturally aspirated stoichiometric operation. Simulation of lean boosted operation with 20% gasoline reformate fraction and 20% downsized displacement predicts a 23% improvement in fuel economy. Furthermore, part load engine-out NOx emissions are reduced by 83% compared to a baseline naturally aspirated stoichiometric production engine with 10% EGR dilution.

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

Combustion Optimization in a Hydrogen-Enhanced Lean-Burn SI Engine

2005-01-0251

View Details

TECHNICAL PAPER

Diluents and Lean Mixture Combustion Modeling for SI Engines with a Quasi-Dimensional Model

952382

View Details

TECHNICAL PAPER

Development of a Two-Stroke/Four-Stroke Switching Gasoline Engine - The 2/4SIGHT Concept

2005-01-1137

View Details

X