Browse Publications Technical Papers 2002-01-0217

Study of the Impact of Variations in the Diesel-Nozzle Geometry Parameters on the Layout of Multiple Injection Strategy 2002-01-0217

In the present paper the impact of three different geometrical layouts of the discharge nozzle of a high-pressure diesel injector designed is examined for a common rail second generation direct injection system. The paper presents a comparative study of the spray behavior of the three different nozzle layouts connected to a 150 MPa rail-pressure when mounted on a 1.6 liter European passenger car engine. To evaluate experimentally the differences in the fundamental physical spray parameters several specially developed optical visualization techniques are used, which enable phase-Doppler, Laser-sheet and high-speed recordings of dense high pressure sprays.
The change in basic spray parameters (time-resolved droplet distribution and spray momentum) caused by the nozzle geometry variation is examined. The impact on the in-cylinder penetration and mixing characteristics is studied with a 3D-numerical simulation code NCF-3D.
The paper continues with a discussion of the interaction between nozzle layout and the use of a multi-strike injection strategy adopted in order to decrease the engine-out NOx and particulate emissions.
The paper concludes with a discussion of the capability of each of the nozzle layouts to enhance the optimization of the multi-strike injection approach.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 16% 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:

Relationship Between Ignition Processes and the Lift-Off Length of Diesel Fuel Jets


View Details


A Study of the Structure of Diesel Sprays Using 2-D Imaging Techniques


View Details


Scale-Resolving Simulations of the Flow in Intake Port Geometries


View Details