Numerical Analysis of Combustion in Gasoline Compression Ignition Engines Nissan Motor Company, Limited

Format:

Book

Conference/Event

Author/Creator:

Yoshizawa, Koudai, 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:

A new auto-ignition combustion model for performing multi-zone engine cycle simulations has been developed to investigate the characteristics of compression ignition combustion in gasoline engines. In this combustion model, the auto-ignition timing is predicted with a modified shell model and combustion speed is calculated with a three-region (burned, ignited and unburned) model. Engine cycle simulations performed with this model were used to analyze the effect of engine operating parameters, id est, temperature and air-fuel distributions in the cylinder, on combustion characteristics. It was found that the air-fuel distribution in the cylinder has a large impact on combustion characteristics and knocking was prevented by creating a fuel-rich zone at the center of the cylinder under high load conditions. The fuel-rich zone works as an ignition source to ignite the surrounding fuel-lean zone. In this way, two-step combustion is accomplished through two separate auto-ignitions. Based on these results, this paper discusses the possibility of obtaining stable auto-ignition combustion in a gasoline engine at high loads without any knocking

Notes:

Vendor supplied data

Publisher Number:

2002-01-2865

Access Restriction:

Restricted for use by site license