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Enhanced Mixture Preparation Approach for Lean Stratified SI-Combustion by a Combined Use of GDI and Electronically Controlled Valve-Timing
Technical Paper
2000-01-0532
ISSN: 0148-7191, e-ISSN: 2688-3627
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Sector:
Event:
SAE 2000 World Congress
Language:
English
Abstract
The first part of the paper gives an overview of the current status in fuel consumption gain of the GDI-vehicles previously launched on the European market.
In order to increase the potential for a further gain in specific fuel consumption the behaviour of 3 different combustion chamber layouts are studied.
The chamber layouts are aimed to adapt as well as possible to the particular requirements for application to a small displacement/small bore engine working in stratified lean conditions.
The paper continues with a description of the application that shows the different steps of a structured optimisation methodology for a 1.2 litre, small bore 4-cylinder engine.
The applications of an air-motion-guided and a wall-guided layout with a mechanically actuated valve train to the same combustion chamber are discussed. The potential of the air-motion-guided concept is enhanced through the introduction of an electromagnetic fully variable valve train.
The layouts are analysed through numerical simulation and tested either on a single cylinder or on a 4 cylinder engine test rig.
The paper concludes with a discussion of the impact of the improvement, which can be obtained through a combination of GDI with fully variable control systems for air-motion and low energy consuming auxiliary components.
Authors
Topic
Citation
Pontoppidan, M., Gaviani, G., Bella, G., Schilardi, M. et al., "Enhanced Mixture Preparation Approach for Lean Stratified SI-Combustion by a Combined Use of GDI and Electronically Controlled Valve-Timing," SAE Technical Paper 2000-01-0532, 2000, https://doi.org/10.4271/2000-01-0532.Also In
References
- Allocca L. Corcione F.E. Golini S. Papetti F. “Measurement and Modeling of spray/wall Dynamics and Heat Transfer” 3rd Int. Kiva Users Meeting SAE Congress Detroit MI 1993
- Ando H. “Mitsubishi GDI Engine - Strategies to meet the European Requirement.” Proceedings from Engine and Environment Graz September 1997
- Amsden, A.A. O'Rourke, P.J Butler, C.D. “KIVA II A Computer Program for Chemical Reactive Flows with Sprays,” Los Alamos National Labs. LA 1989
- Amsden, A.A. O'Rourke, P.J Butler “KIVA III: A KIVA Program with Block Structured Mesh for Complex Geometries” Los Alamos National Labs.
- Grebe U. Königstein A. Friedrich C. Schaffner P. Indra F. “Systemvergleich zwischen Ottomotoren mit Direkteinspritzung und drossel-klappenfreier Laststeuerung durch variable Ventiltriebe.” 20 Internationales Wiener Motoren Symposium VDI 1999 93
- Heywood J. B. “Internal Combustion Engine Fundamentals.” Mc-Graw Hill Book Co New York 1995
- Klütting M. Flierl R. Unger H. “Drosselfreie Laststeuerung - ein Motorkonzept zur Erfüllung zukünftiger Anforderungen.” 20 Internationales Wiener Motoren Symposium VDI 1999 118
- Krämer S. Nieter H. G. Frey J. Karl G. “Der DE-Ottomotor: Quo Vadis - wohin führt der Weg?” 20 Internationales Wiener Motoren Symposium VDI 1999 1
- Pontoppidan M. Bella G. Rocco V. “Mixture formation in SI-Engine intake Systems - A simplified theoretical Model with Experimental Verification.” ASME 1996 Spring Congress
- Pontoppidan M Gaviani G. Bella G. Rocco V. “Direct Fuel Injection - A Study of Injector Requirements for Different Mixture Preparation Concepts” SAE Paper 970628
- Pontoppidan M Gaviani G. Bella G. Rocco V. “Improvements of GDI-Injector Optimization Tools for Enhanced SI-Engine Combustion Chamber Layout.” SAE Paper 980494
- Pontoppidan M Gaviani G. Bella G. Rocco V. “Experimental and Numerical Approach to Injection and Ignition Optimization of Lean GDI-Combustion Behavior.” SAE Paper 1999-01-0173
- Pontoppidan M Di Maio A. Bella G. Rocco V. “Enhanced use of 3-D CFD and Combustion Simulation to Optimize the Development of ECU-Control Algorithms for GDI Spark Ignited Engines.” ICE 99 - Proceedings
- Reitz, R.D. “Assessment of Wall Heat Transfer Models for Premixed-Charge Engine Combustion Computations” SAE Paper 910267