In-Cylinder Studies of CAI Combustion with Negative Valve Overlap and Simultaneous Chemiluminescence Analysis Centre for Advanced Powertrain and Fuels Research, Brunel University

Format:

Conference/Event

Author/Creator:

Yang, Changho, author.

Conference Name:

SAE World Congress & Exhibition (2009-04-20 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2009

Summary:

The negative valve overlap has been shown as one of the most effective means to achieve controlled autoignition combustion in a four-stroke gasoline engine. A number of researches have been carried out on the performance and emission characteristics of CAI engines but there are still some fundamental questions that are yet to be addressed such as in-cylinder process. In the present study, a Ricardo Hydra single cylinder, four stroke optical gasoline engine was instrumented to investigate CAI combustion through negative valve overlap configuration. The effects of direct fuel injection timings and direct air injection at lambda 1 were studied by means of simultaneous in-cylinder heat release study and high speed images of complete chemiluminescence emission, OH and CHO radicals. In particular, the minor combustion process during the NVO period with various air injection quantities was studied with both heat release analysis and chemiluminescence results. The charge cooling and local air/fuel ratio effects were also investigated by varying the quantity of direct injected air in an air assisted injector

Notes:

Vendor supplied data

Publisher Number:

2009-01-1103

Access Restriction:

Restricted for use by site license