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21 Development of a Small Displacement Gasoline Direct Injection Engine
Technical Paper
2002-32-1790
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English
Abstract
We have developed a small-displacement gasoline direct-injection engine (1.3L). Gasoline direct-injection engines rely on ultra-lean stratified combustion to deliver significantly better fuel economy, and are already used in many practical applications. When gasoline direct-injection is applied to a small-displacement engine, however, the amount of wall wetting of fuel on the piston surface will increase because the traveled length of the fuel spray is short. This may result in problems such as smoke production, high emissions of unburned HC, and poor combustion efficiency.
We solved these problems by forming an ideal air-fuel mixture distribution as follows: (1) by developing new multi-hole injectors (maximum fuel pressure of 12 MPa), which offer a high degree of freedom in arranging the fuel spray pattern, have superior atomization characteristics, and maintain their spray shape under high backpressure conditions; and (2) by developing the piston cavity and using a variable swirl control valve to optimize the air motion. These techniques have also made it possible to obtain stable stratified combustion throughout a wide operating range with reduced NOx emissions under a large EGR rate.
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Inoue, H., Matsui, T., and Noyori, T., "21 Development of a Small Displacement Gasoline Direct Injection Engine," SAE Technical Paper 2002-32-1790, 2002.Also In
References
- Lake TH. Stokes J. Whitaker P.A. Crum J.V. “Comparison of Direct Injection Gasoline Combustion Systems” SAE 980154
- VanDerWege Brad A. Hochgreb Simone “Effects of Fuel Volatility and Operating Conditions on Fuel Sprays in DISI Engines:(1) Imaging Investigation” SAE 2000-01-0535
- Murase Eiji Nakama Kenjiro Toyoda Shunji Kusaka Jin Daisho Yasuhiro “Visualization and analysis of gasoline spray in high temperature and pressure with a constant volume chamber” Mechanical Engineering Congress 2001 Japan 2
- Nakama Kenjiro Murase Eiji Toyoda Shunji Kusaka Jin Daisho Yasuhiro “Modeling of Swirl Injector Spray Using TAB model” Mechanical Engineering Congress 2001 Japan 2
- Okamoto Atsuya Sato Takaaki Shirabe Naotaka Anezaki Yukinobu “Development of Fan Spray Simulation for Gasoline Direct Injection Engines” SAE 2001-01-0962
- Shiraishi Takuya Nakayama Yoko Kihara Yusuke Nogi Toshiharu “A Study of Mixture Formation in Spark Ignited Direct Fuel Injection Engines” NO.15-01 JSAE SYMPOSIUM
- Ortmann Rainer Arndt Stefan Raimann Jürgen Grzeszik Roman Würfel Gernot “Methods and Analysis of Fuel Injection,Mixture Preparetion and Charge Stratification in different Direct Injected SI Engines” SAE 2001-01-0970
- Varde Keshav S. Popa Daniel M. “Diesel Fuel Spray Penetration at High Injection Pressure” SAE 830448
- Arai M. Tabata M. Hiroyasu H. Shimizu M. “Disintegrating Process and Spray Characterization of Fuel Jet Injected by a Diesel Nozzle” SAE 84027