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Development of a New Light Stratified-Charge DISI Combustion System for a Family of Engines With Upfront CFD Coupling With Thermal and Optical Engine Experiments
Technical Paper
2004-01-0545
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A new Light Stratified-Charge Direct Injection (LSC DI) spark ignition combustion system concept was developed at Ford. One of the new features of the LSC DI concept is to use a ‘light’ stratified-charge operation window ranging from the idle operation to low speed and low load. A dual independent variable cam timing (DiVCT) mechanism is used to increase the internal dilution for emissions control and to improve engine thermal efficiency. The LSC DI concept allows a large relaxation in the requirement for the lean after-treatment system, but still enables significant fuel economy gains over the PFI base design, delivering high technology value to the customer. In addition, the reduced stratified-charge window permits a simple, shallow piston bowl design that not only benefits engine wide-open throttle performance, but also reduces design compromises due to compression ratio, DiVCT range and piston bowl shape constraints.
The design, analysis, and experimental testing efforts in developing the combustion system are reported in this paper. A combustion system development methodology was developed and adopted. The methodology features vehicle target cascading, upfront CFD-based design optimization and single-cylinder thermodynamic and optically accessible engine testing for design validation and verification. Application of the methodology allowed a significant reduction of hardware iterations, reducing development time and cost. The LSC DI combustion systems were developed for a family of Ford engines with displacement variants of 0.5, 0.42 and 0.38 liter per cylinder. The systems retained substantial design and component commonality between the DI and PFI variants and among the displacement variants. Significant gains in engine output and fuel economy were demonstrated over the baseline PFI design.
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Authors
- Zhiyu Han - Ford Motor Company
- Corey Weaver - Ford Motor Company
- Steve Wooldridge - Ford Motor Company
- Terry Alger - Ford Motor Company
- Jim Hilditch - Ford Motor Company
- Jeff McGee - Ford Motor Company
- Barbara Westrate - Ford Motor Company
- Zheng Xu - Ford Motor Company
- Jianwen Yi - Ford Motor Company
- Xiangdong Chen - Ford Motor Company
- Nizar Trigui - Ford Motor Company
- George Davis - Ford Motor Company
Topic
Citation
Han, Z., Weaver, C., Wooldridge, S., Alger, T. et al., "Development of a New Light Stratified-Charge DISI Combustion System for a Family of Engines With Upfront CFD Coupling With Thermal and Optical Engine Experiments," SAE Technical Paper 2004-01-0545, 2004, https://doi.org/10.4271/2004-01-0545.Also In
References
- Alger, T., McGee, J., and Wooldridge, S., Stratified-Charge Fuel Preparation Influence on the Misfire Rate of a DISI Engine, SAE Paper 2004-01-0549, 2004.
- Alger, T., Blobaum, E., McGee, J., and Wooldridge, S., PIV Characterization of a 4-Valve Engine with a Camshaft Profile Switching (CPS) System, SAE Paper 2003-01-1803, 2003.
- Amsden, A. A., KIVA-3V, Release 2: Improvements to KIVA-3V, Los Alamos National Laboratory Report LA-13608-MS, 1999.
- Amsden, A. A., KIVA-3V: A Block-Structured KIVA Program for Engines with Vertical or Canted Valves, Los Alamos National Laboratory Report LA-13313-MS, 1997.
- Anderson, R.W., Yang, J., Brehob, D.D., Vallance, J.K., and Whiteaker, R.M., Understanding the Thermodynamics of Direct Injection Spark Ignition (DISI) Combustion System: an Analytical and Experimental Investigation, SAE Paper 962018, 1996.
- Han, Z., and Xu, Z., Wall Film Dynamics Modeling for Impinging Sprays in Engines, SAE Paper 2004-01-0099, 2004.
- Han, Z., Yi, J., and Trigui, N., Stratified Mixture Formation and Piston Surface Wetting in a DISI Engine, SAE Paper 2002-01-2655, 2002.
- Han, Z., Xu, Z., Wooldridge, S. T., Yi, J., and Lavoie, G., Modeling of DISI Engine Sprays with Comparison to Experimental In-Cylinder Spray Images, SAE Paper 2001-01-3667, 2001.
- Han, Z., Xu, Z., and Trigui, N., Spray/Wall Interaction Models for Multidimensional Engine Simulation, International Journal of Engine Research, 1, 127-146, 2000.
- Harada, J., Tomita, T., Mizuno, H., Mashiki, Z., and Ito, Y., Development of Direct Injection Gasoline Engine, SAE Paper 970540, 1997.
- Hilditch, J., Han, Z., and Chea, T., Unburned Hydrocarbon Emissions from Stratified Charge Direct Injection Engines, SAE Paper 2003-01-3099, 2003.
- Kemmler, R., Waltner, A., Schoen, C., and Godwin, S., Current Status and Prospects for Gasoline Engine Emission Control Technology - Paving the Way for Minimal Emissions, SAE Paper 2000-01-0856, 2000.
- Koike, M., Saito, A., Tomoda, T., and Yamamoto, Y., Research and Development of a New Direct Injection Gasoline Engine, SAE Paper 2000-01-0530, 2000.
- Kume, T., Iwamoto, Y., Iida, Y., Murakami, N., Akishino, K., Ando, H., Combustion Control Technologies for Direct Injection SI Engines, SAE Paper 960600, 1996.
- McGee, J., Alger, T., Blobaum, E., and Wooldridge, S., Evaluation of a Direct-Injected Stratified Charge Combustion System using Tracer PLIF, SAE Paper 2004-01-0548, 2004.
- Steeper, R. R., and Stevens, E. J., Characterization of Combustion, Piston Temperatures, Fuel Sprays, and Fuel-Air Mixing in a DISI Optical Engine, SAE Paper 2000-01-2900, 2000.
- Stiebels, B., Krebs, R., Pott, E., FSI - Gasoline Direct Injection Engines from Volkswagen, Proc. of GPC Global Powertrain Congress 2001, Vol. A: Advanced Engine Design & Development, Detroit, 2001.
- Takagi, Y., Itoh, T., Muranaka, S., Iiyama, A., Iwakiri, Y., Urushihara, T., and Naitoh, K., Simultaneous Attainment of Low Fuel Consumption, High Output Power and Low Exhaust Emissions in Direct-Injection SI Engines, SAE Paper 980149, 1998.
- Westrate, B., Coulson, G., Kenney, T., Kumar, B., Rogers, M., and Weaver, C., Dynamometer Development of a Lightly Stratified Direct-Injection Combustion System, SAE Paper 2004-01-0547, 2004.
- Westrate, B., Warren, C., VanDerWege, B., Coulson, G., Anderson, R., Dynamometer Development Results of a Stratified-Charge DISI Combustion System, SAE Paper 2002-01-2657, 2002.
- Wooldridge, S., Lavoie, G., and Weaver, C., Convection Path for Soot and Hydrocarbon Emissions from the Piston Bowl of a Stratified Charge Direct Injection Engine, Proc. of the Third Joint Meeting of the US Sections of the Combustion Institute, Chicago, 2003.
- Yang, J., and Anderson, R., Fuel Injection Strategies to Increase Full-Load Torque Output of a Direct-Injection SI Engines, SAE Paper 980495,1998.
- Yi, J., Han, Z., Xu, Z., and Stanley, L., Combustion Improvement of a Light Stratified-Charge Direct Injection Engine, SAE Paper 2004-01-0546, 2004.
- Yi, J., Han, Z., Han, and Trigui, N., Fuel-Air Mixing Homogeneity and Performance Improvements of a Stratified-Charge DISI Combustion System, SAE Paper 2002-01-2656, 2002.
- Zhao, F., Lai, M.-C., and Harrington, D.L., Automotive Spark-Ignition Direct-Injection Gasoline Engines, Progress in Energy and Combustion Science, 25, 437-562, 1999.