This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Development of High Performance Combustion Chamber for Four-Stroke Cycle Small Utility Engines
Technical Paper
1999-01-3336
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Two-valve pent-roof type combustion chamber was employed for four stroke cycle small utility engine. The preliminary performance test showed the higher output was obtained by pent-roof type combustion chamber than the conventional bathtub type combustion chamber. CFD analysis and PIV flow visualization proved that the tumble flow is dominant in pent-roof type combustion chamber. From the investigation of the relationship between the tumble ratio and the engine performance by combustion analysis and cycle simulation, it was found out that the tumble ratio from 0.8 to 1.6 is optimal for engine output. By applying the pent-roof type combustion chamber, the developed engines achieved 7-12% increase in output, 8-10% reduction in BSFC. As for the emission, the developed engines can satisfy the CARB regulations.
Recommended Content
Authors
Citation
Miyauchi, A., Nakachi, M., and Kobayashi, K., "Development of High Performance Combustion Chamber for Four-Stroke Cycle Small Utility Engines," SAE Technical Paper 1999-01-3336, 1999, https://doi.org/10.4271/1999-01-3336.Also In
References
- Fukami Y. et al Effect of Lean-Burn on Emission Reduction in a Small Utility 4-Stroke Spark Ignition Engine Proceedings SETC'97 1997
- Larson T. et al The Volvo 3-Litter 6-cylinder Engine with 4-Valve Technology SAE Paper 901715 1990
- Inoue T. et al In Cylinder Gas motion, Mixture Formation and Combustion of 4 Valve Lean Burn Engine
- Ando et al Characteristics of Turbulence Generated by Tumble and Its Effect on Combustion Mitsubishi Motors Technical Review 1991
- Morel, T. et al Characterization of manifold Dynamics in the Chrysler 2.2 S.I. Engine by Measurements and Simulation SAE paper 900679 1990