Start of Injection Strategies for HCCI-combustion Lund Institute of Technology

Format:

Conference/Event

Author/Creator:

Nordgren, Henrik, author.

Conference Name:

2004 Powertrain & Fluid Systems Conference & Exhibition (2004-10-25 : Tampa, Florida, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2004

Summary:

Homogeneous Charge Compression Ignition (HCCI) has a great potential for low NOx emissions but problems with emissions of unburned hydrocarbons (HC). One way of reducing the HC is to use direct injection. The purpose of this paper is to present experimental data on the trade off between NOx and HC. Injection timing, injection pressure and nozzle configuration all effect homogeneity of the mixture and thus the NOx and HC emissions.The engine studied is a single cylinder version of a Scania D12 that represents a modern heavy-duty truck size engine. A common rail (CR) system has been used to control injection pressure and timing.The combustion using injectors with different nozzle hole diameters and spray angle, both colliding and non-colliding, has been studied. The NOx emission level changes with start of injection (SOI) and the levels are low for early injection timing, increasing with retarded SOI. Different injectors produce different NOx levels. Especially at late injection timing, at about -50° ATDC, there is a significant difference between injectors. The HC emissions also differ for different injection timing and injectors

Notes:

Vendor supplied data

Publisher Number:

2004-01-2990

Access Restriction:

Restricted for use by site license