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GDI with High-Performance 2-Stroke Application: Concepts, Experiences and Potential for the Future
Technical Paper
2004-32-0043
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Thanks to its unsurpassed power-to-weight ratio, its low package space and low-maintenance design, the loop-scavenged two-stroke engine with conventional mixture preparation is still being used in some sectors of vehicle engineering, such as boat drives, snow mobiles and motor scooters, as well as in hand-held applications.
To maintain the potential of the 2-stroke engine for the future it is necessary to take adequate steps against the system-dependent disadvantage of the simple 2-stroke engine, namely that of higher emissions compared to 4-stroke engines. One possible solution is gasoline direct injection. Its more frequent use will increase the production numbers, making it an interesting technology even in the above-mentioned cost-sensitive applications.
The current report presents various concepts of direct injection in 2-stroke engines, from air-assisted injection through to high-pressure direct injection, and compares them with traditional techniques of mixture formation. The report describes the experiences with different direct-injection systems, in particular in high-performance engines, from their development up to series application, presenting both simulation results and measurement data from tests for illustration. It also deals with the feasibility of exhaust aftertreatment and with the particularly critical subjective assessment of smoke and smell. In-depth investigations using 3D-CFD were made to develop and examine the different combustion methods and injection systems, including spray and combustion simulations with CFD codes specially adapted for two-stroke engines, taking the movement of the specific two-stroke charge into account. Flow investigations were made to evaluate the simulation and were compared with the tests and the simulations by means of measuring techniques specially adapted for two-stroke engines.
The report concludes with an outlook on the effects of gasoline direct injection on fleet emissions and with the evaluation of future gasoline direct-injection technologies as to their feasibility and potential.
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Authors
- Stephan Schmidt - Institute for Internal Combustion Engines and Thermodynamics Graz University of Technology (GUT)
- Helmut Eichlseder - Institute for Internal Combustion Engines and Thermodynamics Graz University of Technology (GUT)
- Roland Kirchberger - Institute for Internal Combustion Engines and Thermodynamics Graz University of Technology (GUT)
- Peter Nimmervoll - Bombardier Recreational Products (BRP)
- Gerd Ohrnberger - Bombardier Recreational Products (BRP)
- Michael Wagner - Bombardier Recreational Products (BRP)
Topic
Citation
Schmidt, S., Eichlseder, H., Kirchberger, R., Nimmervoll, P. et al., "GDI with High-Performance 2-Stroke Application: Concepts, Experiences and Potential for the Future," SAE Technical Paper 2004-32-0043, 2004, https://doi.org/10.4271/2004-32-0043.Also In
References
- Korman, Matjaz Flow and Engine Test Bench Development of Crankcase Supercharged Four Stroke Engine with Oil Separating System SETC 2004
- Laimboeck, Franz Klasnic, Horst Grilc, Simon Meister, Gerhard Dorfstaetter, Markus AVL SDIS Mk.II-Low Cost Automotive FI Applied to 2-Stroke Engines for Future Carb-Regulations SAE 1999-01-3285
- Nuti, Marco Emissions from Two-Stroke Engines SAE R-223 1998
- MTZ 13 1952 10
- Pontoppidan, Michael Gaviani, G. Bella, G. DeMaio, A. Optimization by CFD simulation of Spray formation Parameters to adapt Direct Injection high-pressure Fuel injectors to high-speed SI-engines SAE 2004 01 0539
- Sogawa, Masafumi Masahiko, Kato Development Of the High Pressure Direct Injection System for Two-Stroke Outboard Motor SAE 2001 01-1786/4209, SETC 2001
- Fukami, Yoji Watabe, Saturo Jinja, Yoichi Matsuda, Yoshimoto Takhashi, Keiji Noda, Tadayo Superiority of Newly Developed Direct-Injection Engine over Conventional Engine for Personal Watercraft SAE 2001 01-1787/4210, SETC 2001
- Arnone, L. Marcacci, M. Kirchberger, R. Pontoppidan, M. Busi, R. Development of a Direct Injection Two-Stroke Engine for Scooters SAE 2001-01-1782/4205 2001
- Eichlseder, Helmut Baumann, Eckhard Mueller, Peter Rubbert, Stephan Gasoline Direct Injection - A Promising Engine Concept for Future Demands SAE 2000-01-0248 1998
- Haugen, David Martelli, Ronald Williams, Paul Direct Injection SI Engine Technology 2000 SAE SP 1499
- Stan, Cornel 1999
- Kirchberger, Roland Possible Solutions for Euro 2 „Low Emission Low Cost” 50cc Engines; IAT 03; Koper 2003