Effects of Intake Valve Timing on Premixed Gasoline Engine with CAI Combustion

2004-01-2953

10/25/2004

Event
2004 Powertrain & Fluid Systems Conference & Exhibition
Authors Abstract
Content
3D multi-cycle simulations were carried out to better understand the effects of variable intake valve timings on gas exchange processes, mixing quality and CAI combustion. The full engine cycle simulation including complete gas exchange and combustion processes was carried out over several cycles in order to obtain the stable cycle for analysis. The combustion models used in the present study are shell ignition model and laminar-and- turbulent characteristic time model, which were modified to take the high level EGR into account. After the validation of the model against experimental data, the investigations of the effects of variable intake valve timing strategies on CAI combustion process were carried out. These analyses showed the amount of backflow and flow patterns were dependent on IVO. Late backflow played an important role in improving the mixing quality. Early backflow decreased the mixture temperature at IVC, due to heat loss. In addition, the backflow was also found to affect the combustion behaviors.
Meta TagsDetails
DOI
https://doi.org/10.4271/2004-01-2953
Pages
15
Citation
Cao, L., Zhao, H., Jiang, X., and Kalian, N., "Effects of Intake Valve Timing on Premixed Gasoline Engine with CAI Combustion," SAE Technical Paper 2004-01-2953, 2004, https://doi.org/10.4271/2004-01-2953.
Additional Details
Publisher
Published
Oct 25, 2004
Product Code
2004-01-2953
Content Type
Technical Paper
Language
English