SIP, Innovative Combustion Technology,  "Gasoline Combustion Team

Research and Development of Super-Lean Burn Combustion for High Efficiency SI Engines

The "Innovative Combustion Technology" program, a national project is established under the Cabinet Office, Government of Japan as a part of the" Cross-ministerial Strategic Innovation Promotion Program (SIP)". The "Gasoline Combustion Team" is one of teams of the "Innovative Combustion Technology" program.This website is to introduce the research and development activities of the "Gasoline Combustion Team."

The "Gasoline Combustion Team" is comprised of Keio University as a Leader university and 29 universities as a Cluster university. Upon agreement with the Japan Science and Technology Agency (JST), we have been conducting the research on the "Super-Lean Burn for Gasoline Engines" with a support of the Research Association of Automotive Internal Combustion Engines (AICE) under the strong industry, academia and government collaboration.

We take both scientific and technological approaches to innovative combustion technologies to realize the "Super- Lean Low Temperature Combustion", targeting a thermal efficiency of 50%.

Project Professor Norimasa Iida

Team Leader
Project Professor Norimasa Iida
Keio University, Graduate school of science and technology

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Topics&News

It was succeeded in measuring minute loc・・・

  ・It was examined the influence of reduction of turbulence by compression and increase of heat transfer by enhanced tumble on local heat flux. ・It was demonstrated cooling loss reduction by lean burn. Daijiro Ishii Tokyo City University Details of contents: Daijiro Ishii et al, Development of thin-film thermocouple for engines and its measurement system, JSAE 2017 Comment: The instantaneous heat flux sensor and measurement system developed by authors r...

New control algorithm for improving ther・・・

  It is important to prevent knock phenomenon in the case where improving thermal efficiency by adjusting spark advance cyclically. In this study, the control algorithm provides the maximum thermal efficiency under the constraint of knock probability by combining the extremum seeking method for thermal efficiency and maximal likelihood-based control for knock probability. Xun Shen Sophia University Details of contents: Published in Xun Shen, Yahui Zhang, Tielon...

Clarification of Cycle-to-cycle Variatio・・・

  The cause of cycle-to-cycle variation of combustion in super lean burn with enhanced tumble flow was examined using fast FID/NDIR and in-cylinder pressure sensor. As a result, the variation of IMEP was found to have strong correlation with the combustion efficiency due to the bulk quench at early expansion stroke. Toshiki Tatemura Graduate school of Chiba University Details of contents: ”Cycle-to-cycle Variation Analysis of Combustion in a Lean Burn Gasoline E...

SIP detailed reaction model perfectly pr・・・

  In this study, a new high-pressure shock tube was developed to measure long ignition delays at low-temperature oxidation region where is important to understand and prevent knocking (Fig.1). Using the shock tube, ignition delay times for real gasolines were measured in a wide temperature range. The ignition delays for SIP common regular gasoline SGR (filled symbols in Fig.2) were in good agreement with those for the corresponding surrogate fuel S5R (open symbols in Fig. 2). The ignitio...

World-first development and validation o・・・

  The fractal dynamic SGS (FDSGS) combustion model is validated using DNS results of turbulent flame in a confined vessel, and an approach for extension of the model applicability for gasoline engines is proposed. Rie Yamada Tokyo Institute of Technology Details of contents: Rie Yamada, Yuzuru Nada, Katsuhiro Hiraoka, Basmil Yenerdag, Yuki Minamoto, Masayasu Shimura, Mamoru Tanahashi:Development of fractal dynamic SGS combustion model for turbulent premixed comb...

Effect of equivalence ratio distribution・・・

  Knocking simulation in a constant volume reactor was carried out by using the compressible Navier-Stoke equations with a detailed reaction mechanism of n-heptane. In this study, we investigated the influence of equivalence ratio distributions on knocking combustion, assuming multistage injections in an engine cylinder. The result showed, in a condition (Case B in the lower left figure), characteristic two-stage autoignition occurred (lower right figure), leading to the increase of knoc...

Influences of Turbulence Scale on Combus・・・

  Improvement of burning velocity by in-cylinder flow is important to achieve higher thermal efficiency of gasoline engines by further lean burn technique with EGR. Therefore, influences of turbulence scale on combustion duration and flame shape were investigated in this study. The combustion durations, especially in initial combustion stage, were reduced by the smaller size of turbulent eddy even at the same turbulence intensity. Masayoshi Morita Kyushu university ...

A study on reduction of cooling loss by ・・・

  The influence of water addition on combustion and heat transfer was investigated by using a rapid compression and expansion machine (RCEM) which can simulate the single combustion cycle of SI engine. Experimental results show that the water addition suppresses knock and decreases local heat flux on the piston top surface. Ryota Yamada Tokyo institute of technology Details of contents: Ryota Yamada, Susumu Sato and Hidenori Kosaka.“A Study on Reduction of Cool...

Development of Three-point MEMS heat flu・・・

  A three-point heat flux sensor for internal combustion engines has been developed with MEMS (Micro-Electro-Mechanical Systems) technology. This sensor can measure wall heat fluxes at adjacent three points for detecting turbulent properties. One of the strong point is a high S/N ratio enough to observe the instantaneous heat transfer in the engines by using RTD (Resistance Temperature Detector) method. Kazuhito Dejima Meiji University Details of contents: Kazuh...

Numerical simulation of the spark channe・・・

  Lagrangian particles are introduced in 3D CFD code to calculate the spark channel behavior. Secondary electrical circuit model of ignition coil is used to calculate voltage and current at the spark plug. The spark discharge experiment is conducted at the air charged constant volume vessel. The results shows the calculated spark channel length, voltage and current are in good agreement with experimental results. Takushi Fujioka Okayama University Details of co...

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