Browse Publications Technical Papers 2003-01-0028
2003-03-03

The Influence of Variable Valve Actuation on the Part Load Fuel Economy of a Modern Light-Duty Diesel Engine 2003-01-0028

An investigation has been carried out to identify how variable valve actuation (VVA) can be used to improve the part load fuel economy of a modern light-duty diesel engine. The base engine examined employed a variable geometry turbo-charger (VGT) with air to air inter-cooling, cooled exhaust gas re-circulation (EGR) and common rail fuel injection. The VVA system investigated was of the variable duration type, controlling primarily exhaust valve opening and intake valve closing events.
This paper describes how the fuel economy of the base engine was affected by the interactions of the VGT and EGR systems. It then presents simulation data that shows the methods by which fuel economy can be improved by the use of VVA, explains the phenomena that lead to this improvement and quantifies the extent to which it can be improved: Indicated and brake specific fuel consumption improvements of up to 6% and 19% respectively, were found during the course of this work.

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

The Application of Variable Event Valve Timing to a Modern Diesel Engine

2000-01-1229

View Details

TECHNICAL PAPER

A Calculation Methodology for Cam Overlap Optimization Towards Combustion Quality at Idle in IC SI Engines

2003-32-0040

View Details

JOURNAL ARTICLE

Application of Concentric Cam Shafts to a Passenger Car Diesel Engine to Significantly Improve the NOx /Soot Tradeoff

2011-24-0134

View Details

X