Browse Publications Technical Papers 1999-01-0170
1999-03-01

Direct Injection Gasoline Engines - Combustion and Design 1999-01-0170

The charge motion controlled combustion concept for SI engines with direct fuel injection exhibits an excellent fuel economy and emission potential in comparison with other DI combustion concepts. It realizes a stable combustion behavior all over the engine map. Because injection and ignition timing has little bearing on emission and ignition safety, the new concept can be easily applied under DI specific operational conditions. The combination of fired engine tests and optical investigations with CFD calculations enables an efficient process optimization under the boundary conditions as imposed by the respective design. The high EGR tolerance enables a large reduction of NOx emission, which is the expected basic requirement to meet future emission standards.
In addition to favorable part load behavior, the new combustion concept also displays all of the characteristics for a good full load behavior. Its compact central combustion chamber design perfectly meets the requirements of homogeneous operation. Further, the use of roller finger followers enables a favorable cylinder head design, meeting all requirements of the combustion concept and ensuring minimal valve train friction.

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

Development of a Direct Injection High Flexibility Cng/Lpg Spark Ignition Engine

2009-01-1969

View Details

TECHNICAL PAPER

Combustion Characteristics of a Spray-Guided Direct-Injection Stratified-Charge Engine with a High-Squish Piston

2005-01-1937

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

X