An Approach for Modeling the Effects of Gas Exchange Processes on HCCI Combustion and Its Application in Evaluating Variable Valve Timing Control Strategies University of Michigan

Format:

Book

Conference/Event

Author/Creator:

Babajimopoulos, Aristotelis, author.

Conference Name:

SAE Powertrain & Fluid Systems Conference & Exhibition (2002-10-21 : San Diego, California, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2002

Summary:

The present study introduces a modeling approach for investigating the effects of valve events and gas exchange processes in the framework of a full-cycle HCCI engine simulation. A multi-dimensional fluid mechanics code, KIVA-3V, is used to simulate exhaust, intake and compression up to a transition point, before which chemical reactions become important. The results are then used to initialize the zones of a multi-zone, thermo-kinetic code, which computes the combustion event and part of the expansion. After the description and the validation of the model against experimental data, the application of the method is illustrated in the context of variable valve actuation. It has been shown that early exhaust valve closing, accompanied by late intake valve opening, has the potential to provide effective control of HCCI combustion. With appropriate extensions, the present modeling approach can account for mixture inhomegeneities in both temperature and composition, resulting from gas exchange, heat transfer and insufficient mixing

Notes:

Vendor supplied data

Publisher Number:

2002-01-2829

Access Restriction:

Restricted for use by site license