Swirl Controlled 4-Valve Engine Improves in Combustion under Lean Air-Fuel Ratio

871172

11/08/1987

Event
4th International Pacific Conference on Automotive Engineering
Authors Abstract
Content
Since a 4-valve engine is less flexible in the design and location of the intake ports as compared with a conventional 2-valve engine, there are some difficulties in strengthening the air motion, including swirl and turbulence, in order to achieve stable combustion under lean mixture operation.
This study examined air motion imporvements of 4-valve engine that result in a stable combustion with a lean mixture. These improvements are brought about by the installation of a swirl control valve in each intake port.
The results of this study have clarified that the lean stable limit was extended from an air-fuel ratio of 21.5 to 26.3 under a partial load, by optimizing the location and diameter of aperture of the swirl control valve.
Meta TagsDetails
Pages
8
Citation
Yokoyama, J., Takagi, Y., Itoh, T., and Urushihara, T., "Swirl Controlled 4-Valve Engine Improves in Combustion under Lean Air-Fuel Ratio," SAE Technical Paper 871172, 1987, .
Additional Details
Publisher
Published
Nov 8, 1987
Product Code
871172
Content Type
Technical Paper
Language
English