Study of the Impact of Variations in the Diesel-Nozzle Geometry Parameters on the Layout of Multiple Injection Strategy Magneti Marelli Power Train Systems

Format:

Book

Conference/Event

Author/Creator:

Pontoppidan, M., author.

Conference Name:

SAE 2002 World Congress & Exhibition (2002-03-04 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2002

Summary:

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

Notes:

Vendor supplied data

Publisher Number:

2002-01-0217

Access Restriction:

Restricted for use by site license