This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Two-Stroke GDI: Improvement of Engine Behaviour at Light Loads
Technical Paper
2001-24-0056
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Direct fuel injection is becoming mandatory for two-stroke S.I. engines, since it allows using only air in the scavenging process, preventing fuel loss from the exhaust port.
However, also combustion irregularity at light loads is a problem of these engines, due to excessive presence of residual gas in the charge. For its solution, additional strategies must be adopted. The two most suitable ones are charge stratification and ATAC (Active Thermo Atmosphere Combustion), which makes use of residual gas energy to ignite fresh gas, turning the effect of residual gas from negative to positive.
In previous papers, the possibility of combining ATAC with different injection systems was proved.
This paper provides further insight on ATAC combined with liquid high-pressure direct injection and shows the studies and the first experimental results relative to charge stratification.
Recommended Content
Authors
Citation
Gentili, R., Frigo, S., Zanforlin, S., and Cozzolino, F., "Two-Stroke GDI: Improvement of Engine Behaviour at Light Loads," SAE Technical Paper 2001-24-0056, 2001, https://doi.org/10.4271/2001-24-0056.Also In
References
- Onishi S. Hong Jo S. Shoda K. Do Jo P. Kato S. “Active Thermo-Atmosphere Combustion (A.T.A.C.) - A New Combustion Process for Internal Combustion Engines” SAE Paper 790501 1979
- Noguchi, M. Tanaka, Y. Tanaka, T. Takeuchi Y. “A Study on Gasoline Engine Combustion by Observation of Intermediate Reactive Products during Combustion” SAE Paper 790840 1979
- Lida N. “Combustion Analysis of Methanol-Fueled Active Thermo-Atmosphere Combustion (A.T.A.C.) Engine Using a Spectroscopic Observation” SAE Paper 940684 1994
- Ishibashi, Y. Tsushima Y. “A Trial for Stabilizing Combustion in Two-Stroke Engines at Part Throttle Operation”, Pro. Int. Seminar “A New Generation of Two-Stroke Engines for the Future?” Rueil-Malmaison (France) 1993
- Gentili, R. Frigo, S. Tognotti, L. Habert, P. Lavy J. “Experimental Study on ATAC (Active Thermo-Atmosphere Combustion) in a Two-Stroke Gasoline Engine” SAE Transaction 970363 SP 1254 1997
- Gentili R. Frigo S. “ATAC and GDI in a Small Two-Stroke Engine” Pro. Int. Conf. SETC 99 Madison, Wisconsin 1999 SAE Paper 1999-01-3273
- Gentili, R. Frigo S. “Further Insight on ATAC and GDI Combination in Two-Stroke Engines” SAE Paper 2000-01-0897
- Corcione, F. E. Rotondi, R. Gentili, R. Migliaccio M. “Modeling the Mixture Formation in a Small Directed-Injected Two-Stroke Spark-Ignition Engine” SAE Paper 970364
- Duret, P. Venturi S. “Automotive Calibration of the IAPAC Fluid Dynamically Controlled Two-Stroke Combustion Process” SAE Paper 960363 1996
- Ishibashi, Y. Asai M. “A Low Pressure Pneumatic Direct Injection Two-Stroke Engine by Activated Radical Combustion Concept” SAE Paper 980757 1998