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Design Considerations for Overhead Valve Train in Small High Speed 4-Cycle Engines
Technical Paper
978476
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Language:
English
Abstract
Ryobi Outdoor Products (ROP) in Arizona, one of the subsidiaries of Ryobi Group of companies, developed 26.2cc OHV engine for string trimmers. (2) The outline of the valve train of this engine was presented at the SAE conference at Indianapolis 1996.(3) This paper describes methodologies and theoretical considerations by which such a unique valve train was developed. The theoretical consideration includes how optimize the valve train design to minimize the moving mass as a total system. Methodology for optimizing the design of each component of valve train is also presented. A review of how the theoretical optimization was translated into the final production engine design is given. The experimental effort to optimize cylinder head design to make the overall optimized design theory reality is described.
Authors
Citation
Kurihara, K. and Conley, J., "Design Considerations for Overhead Valve Train in Small High Speed 4-Cycle Engines," SAE Technical Paper 978476, 1997.Also In
References
- California Exhaust Emission Standards and Test Procedures for the 1994 and Subsequent Model Year Utility and Lawn and Garden Equipment Engines State of California Air Resources Board Hearing December 14 1990
- Conley J.G. , Olsen J. K. , Kurihara K. , Imagawa Y. , Rickard G. The New Ryobi 26.2 cc, OHV, 4-Stroke Engine for Hand Held Equipment Applications SAE Paper No. 961728 1996
- Conley J. G. , Olsen J. K. , Kurihara K. , Rickard G. , Hermann H. The Development of a Durable, Cost Effective, Overhaed Valve train for Application torn Small, 4-Cycle Engines SAE Paper 961729 1996
- Conley J.G. and Asher D.M. Team Management Practices and the Development of the AC 4-cycle Engine Proceedings of IMPRO 1996 The Juran Institute Wilton, Connecticut 1996
- Fukuoka S. , Hara N. , Mori A. , Ohtsubo K. Reduction of Engine Friction Loss by New Lighter Valve Train Components JSAE Paper 9633919 1996
- Engine Data Book Sankaido 1993