The Characteristics of Fuel Consumption and Exhaust Emissions of the Side Exhaust Port Rotary Engine

950454

02/01/1995

Event
International Congress & Exposition
Authors Abstract
Content
Mazda has been pursuing the research of side exhaust porting for its rotary engine in an effort to improve the engine's fuel efficiency and exhaust emissions characteristics. The side exhaust porting configuration provides greater flexibility in setting port timing and shape, as compared to the peripheral exhaust porting configuration, which is in use in the current-generation rotary engines; the side exhaust porting configuration enables the selection of a port timing more favorable to reduced fuel consumption and exhaust emissions.
The side exhaust port rotary engine used in this research has its exhaust port closure timing around the top dead center (TDC) and has no intake-exhaust timing overlap. As a result, burnt gasses entering the next cycle of combustion are reduced, thus enhancing combustion stability; also, the air-fuel ratio can be set leaner for improved fuel consumption. In addition, since the trailing-side end of the combustion chamber does not open to the exhaust port, HC exhaust emissions are reduced.
Meta TagsDetails
DOI
https://doi.org/10.4271/950454
Pages
10
Citation
Shimizu, R., Okimoto, H., Tashima, S., and Fuse, S., "The Characteristics of Fuel Consumption and Exhaust Emissions of the Side Exhaust Port Rotary Engine," SAE Technical Paper 950454, 1995, https://doi.org/10.4271/950454.
Additional Details
Publisher
Published
Feb 1, 1995
Product Code
950454
Content Type
Technical Paper
Language
English