This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The New Ryobi 26.2 cc, OHV, 4-Stroke Engine for Hand Held Power Equipment Applications
Annotation ability available
Sector:
Language:
English
Abstract
This paper outlines the design and construction of a small 26.2 cc overhead valve, 4-cycle engine recently developed by the Ryobi Group of Companies for hand held power equipment applications. Four cycle engines produce fewer hydrocarbon emissions and typically generate better low end torque than the commonly used two cycle. In order to displace the high power density two-stroke technology however, a four cycle design must be cost and performance competitive. Additionally, the engine must be durable and functional at operating speeds in excess of 8,500 r.p.m. The Design for Manufacturability and Design for Assembly methodology used to create the individual powertrain components and subsystems for the new, lightweight power plant to meet the desired cost, performance, and packaging objectives is reviewed.
Recommended Content
Ground Vehicle Standard | Turbocharger Gas Stand Test Code |
Technical Paper | Preliminary Investigation On the Viability of 1,3-Dioxolane as an Alternative to MTBE in Reformulated Gasoline |
Technical Paper | New Developments in Packaging of Ceramic Honeycomb Catalysts |
Authors
Citation
Conley, J., Olsen, J., Kurihara, K., Imagawa, Y. et al., "The New Ryobi 26.2 cc, OHV, 4-Stroke Engine for Hand Held Power Equipment Applications," SAE Technical Paper 961728, 1996, https://doi.org/10.4271/961728.Also In
Design, Modeling, and Emission Control for Small Two- and Four-Stroke Engines
Number: SP-1195; Published: 1996-08-01
Number: SP-1195; Published: 1996-08-01
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 CCR
- “Utility Engine Regulation Status Report” California Air Resources Board Staff Report January 25 1996
- Sun X. Brereton G. Morrison K. Patterson D. “Small Engine Emissions” Off Highway Engineering December 1995 5 9
- Brereton G. Morrison K. Christy H. Schwartz G. Patterson D. “ Measured Emissions of Small Engines Under Steady and Transient Operations” SAE paper 941806 1994
- Sun X. Brereton G. Morrison K. Patterson D. “Emissions Analysis of Small Utility Engines” SAE Paper 952080 1995
- Hoffman R. Kurihara K. Olsen J. “Powdered Metal Camshaft Assembly” 1994
- Everts R. “Operator Carried Power Tool Having a 4-Cycle Engine” 1993
- Imagawa Y. Kohmoto H. “Lubricating Device for Four Stroke Engine” 1993
- Everts R. “Wrist Pin, Piston Assembly and Method of Making Same” 1991
- Everts R,. “Carburetor Priming System for Internal Combustion Engine” 1986
- Everts R. “Connecting Rod for an Internal Combustion Engine” 1983
- Everts R. “Crankshaft with Laminated Counterweight” 1982
- Conley J. G. 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
- Yamada T. Usui H. Tosa H. Conley J. “Experience with the Production of Cast Al Alloy Engine Blocks by Low, Medium and High Pressure Casting Processes” SAE Transactions: Journal of Engines , SAE Paper # 920572 1992
- Taylor C. “The Internal Combustion Engine in Theory and Practice, Volume II” MIT Press 77 1984
- Conley J. Olsen J. Kurihara K. Rickard G. Hermann H. “The Development of a Durable, Cost Effective, Overhead Valve Train for Application to Small 4-Cycle Engines” SAE paper No. 961729 1996
- Wright M. “A Data Aquisition System for a Small, 4-Cycle Engine” Department of Mechanical Engineering, Northwestern University June 1996
- Conley J. Olsen J. Kurihara K. Rickard G. “The Optimization of a 26.2 cc, OHV, 4-Cycle Engine Aspiration System to Achieve 1999 CARB Emissions Standards” SAE paper No. 961737 1996