研究者詳細 - 小橋　好充

論文 - 小橋　好充

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Proposal on Controlled Spray Evaporation and Mixture Formation by Use of Multi-Component Mixing Fuel Spray Model 査読

KOBASHI, YOSHIMITSU, Masashi MATSUMOTO, Eriko MATSUMURA, Jiro SENDA

International Council on Combustion Engines (CIMAC2010) ( 118 ) 1 - 15 2010年6月

Feasible Study of Spray and Combustion Control Using Dual Component Fuel Based on Multicomponent Spray Model 査読

International Conference on Liquid Atomization and Spray Systems 2009年7月

二成分混合燃料の減圧沸騰噴霧を用いた部分予混合燃焼に関する研究査読

和田好充, 真柄紀幸, 大山洋司, 千田二郎, 藤本元

自動車技術会論文集 40 ( 1 ) 123 - 128 2009年1月

Demonstrating the potential of mixture distribution control for controlled combustion and emissions reduction in premixed charge compression ignition engines 査読

Yoshimitsu Wada, Jiro Senda

SAE Technical Papers 2009年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

The objective of this study is to explore the relation among mixture distribution condition, chemical character of fuel, combustion processes, and emissions characteristics with premixed charge compression ignition (PCCI) operation. The present experiment employs two fuel injectors which are capable of port injection and direct one. The former was used to supply a highly-homogeneous mixture and the latter with late injection timing was employed to control the mixture heterogeneity. Thus, these sets of injection equipments are capable of setting a wide variety of mixture heterogeneity. Furthermore, two primary reference fuels were used in order to know the influences of chemical character. The experiments were conducted in order to clarify the combustion and emissions characteristics through engine tests. Optical diagnostic was also performed to gain additional insight into the combustion processes for a wide variety of mixture distribution. The results using the port injection showed that the steepness of the combustion was affected by the local equivalence ratio rather than the overall one. The double injection using both injection equipments demonstrated that the ignition source was the mixture formed by the direct injection and there was the optimum mass fraction of direct injection to reduce the maximum pressure rise rate in the case of combination of lower octane number fuel and lower compression ratio. In contrast, the different tendency was observed for the combination of higher octane number fuel and higher compression ratio. Copyright © 2009 SAE International.

DOI： 10.4271/2009-01-0498

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ポート噴射と直接噴射の各種組み合わせにおけるPCCI燃焼の時空間的進行過程と排出ガス特性査読

小橋好充, 上田圭佑, 城戸良仁, 千田二郎, 藤本元

日本機械学会論文集(B編) 75 ( 759 ) 2329 - 2337 2009年

Combustion Control in DI Compression Ignition Engines with Partially Premixed Charge Operation Using Flashing Spray of Mixed Fuel 査読

Yoshimitsu Wada, Noriyuki Magara, Jiro Senda, Hajime Gen Fujimoto

International Conference on Modeling and Diagnostics for Advanced Engine Systems (COMODIA) 151 - 158 2008年7月

各種脂肪酸メチルエステルのディーゼル噴霧燃焼特性に関する実験的研究(第2報)－噴霧の巨視的特性およびすす生成特性に関する基礎解析－査読

池田智樹, 羽原輝晃, 桜井翔, 和田好充, 鶴谷和司, 千田二郎, 藤本元

自動車技術会論文集 39 ( 2 ) 269 - 274 2008年3月

各種脂肪酸メチルエステルのディーゼル噴霧燃焼特性に関する実験的研究(第1報)－着火特性および熱発生率の基礎解析－査読

池田智樹, 羽原輝晃, 桜井翔, 和田好充, 千田二郎, 藤本元, 鶴谷和司

自動車技術会論文集 39 ( 2 ) 263 - 268 2008年3月

Improvement of combustion and emissions in diesel engines by means of enhanced mixture formation based on flash boiling of mixed fuel 査読

J. Senda, Y. Wada, D. Kawano, H. Fujimoto

INTERNATIONAL JOURNAL OF ENGINE RESEARCH 9 ( 1 ) 15 - 27 2008年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：PROFESSIONAL ENGINEERING PUBLISHING LTD

A novel approach to reduce diesel engine emissions at relatively low injection pressures is proposed. This approach is based on the use of a mixed fuel where an additive or a low boiling point fuel such as CO(2), gas fuel, or gasoline is mixed with a higher boiling point fuel such as diesel gas oil. When producing such a fuel, the vapour-liquid equilibrium in the two-phase region where the liquid and vapour phases of both components coexist is taken into account. In designing a mixed fuel, the authors intend to control both the physical process in the spray such as fuel evaporation and vapour air mixing and the chemical processes including spontaneous ignition and with reactions with regard to NO(x), particulate matter (PM), and hydrocarbon (HC) formation. In this study flash boiling of mixed fuel is particularly focused on enhancing the mixing process in the spray because it has the potential to achieve fast evaporation and relatively lean and homogeneous mixtures. Experiments were carried out using two types of mixed fuel, both of which can generate flash boiling during injection events. In an experiment using a rapid compression machine (RCM) and an optical engine, mixed fuels consisting of liquefied CO(2) as an additive and n-tridecane representing gas oil were employed with the aim of simultaneously reducting soot and NO(x) emissions. The high-speed images acquired for sprays reacting in the RCM and the engine clearly showed a significant reduction of soot formation in the spray. Reductions of soot and NO(x) emissions as well as the fuel consumption were also confirmed by emission measurements and a combustion analysis respectively. In other experiments, different types of mixed fuel consisting of gas or gasoline and gas oil were tested to see the effects on both the evaporation and ignition processes. The result of an engine experiment showed marked reductions of soot and HC emissions and fuel consumption.

DOI： 10.1243/14680874JER02007

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Controlling PCCI Combustion with Mixed Fuel - Effect of Fuel Ignitability, Compression Ratio and Charge Heterogeneity- 査読

Yoshimitsu Wada, Keisuke Ueda, Naoki Kitamura, Noriyuki Magara, Yuji Nishimura, Jiro Senda, Hajime Fujimoto

Review of Automotive Engineering 29 ( 29 ) 65 - 71 2008年1月

混合燃料による予混合圧縮着火燃焼の制御－燃料の着火性、混合気濃度不均一性および圧縮比の影響－査読

和田好充, 上田圭佑, 北村直樹, 真柄紀幸, 西村優史, 千田二郎, 藤本元

自動車技術会論文集 38 ( 6 ) 59 - 64 2007年11月

Controlling PCCI Combustion with Mixed Fuel - Application of Flashing Spray to Early Injection - 査読

KOBASHI, YOSHIMITSU, Yuji Nishimura, Akihiro Yamaguchi, Noriyuki Magara, Jiro Senda, Hajime Fujimoto

SAE Technical Paper, No. 2007-01-0624 1 - 19 2007年4月

燃料の着火性と濃度不均一性が直接噴射式PCCI機関の燃焼特性・運転範囲に及ぼす影響査読

和田好充, 沖本和樹, 北村直樹, 上田圭佑, 千田二郎, 藤本元

日本機械学会論文集(B編) 73 ( 728 ) 1121 - 1128 2007年4月

Spray and Combustion Characteristics for Reformulated Mixing Fuel of Biodiesel with Lower Boiling Point Fuel 査読

Jiro Senda, Tomoki Ikeda, Teruaki Haibara, Sho Sakurai, KOBASHI, YOSHIMITSU, Hajime Fujimoto

SAE Technical Paper, No. 2007-01-0621 1 - 11 2007年4月

混合燃料による予混合圧縮着火機関の燃焼制御(第1報)－種々の過熱度および雰囲気条件下における減圧沸騰噴霧の特性－査読

和田好充, 山口晃弘, 西村優史, 真柄紀幸, 尹俊圭, 千田二郎, 藤本元

自動車技術会論文集 38 ( 1 ) 85 - 90 2007年1月

混合燃料による予混合圧縮着火機関の燃焼制御(第2報)－減圧沸騰噴霧の適用による燃焼改善－査読

和田好充, 西村優史, 山口晃弘, 真柄紀幸, 千田二郎, 藤本元

自動車技術会論文集 38 ( 1 ) 91 - 96 2007年1月

Effect of octane rating and charge stratification on combustion and operating range with di PCCI operation 査読

Yoshimitsu Wada, Kazuki Okimoto, Naoki Kitamura, Keisuke Ueda, Jiro Senda, Hajime Fujimoto

SAE Technical Papers 1 - 13 2007年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

A single cylinder engine has been run with direct-injection premixed charge compression ignition (PCCI) operation. The operation is fueled with primary reference fuels for a wide variety of injection timing and equivalence ratio to investigate the effect of charge stratification and octane rating on PCCI combustion. The test results showed that although the change of the injection timing can gain the high combustion efficiency for a wide range of equivalence ratio, the combustion phasing where the high combustion efficiency is accomplished is not varied only by changing the injection timings. Therefore, the only change of injection timings does not improve the thermal efficiency which is influenced by the combustion phasing. On the other hand, at the fixed compression ratio, inlet air temperature and so on, the octane rating is useful in altering the combustion phasing. The experiments in which the octane rating was changed demonstrated that for the lean air-fuel mixture which produces low NOx emission without EGR, the combustion phasing must be advanced to gain the better combustion efficiency at low load. By contrast, higher equivalence ratio allows the combustion phasing to be retarded with keeping high combustion efficiency. Copyright © 2007 SAE International.

DOI： 10.4271/2007-01-0053

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相平衡理論およびソノケミストリーを用いた重質系燃料の改質に関する基礎的研究(第1報：燃料におけるソノケミストリー) 査読

花田俊一, 上田一生, 和田好充, 千田二郎, 渡辺好章

日本機械学会論文集(B編) 72 ( 724 ) 2984 - 2991 2006年12月

キャビテーション気泡の成長・崩壊を考慮した多成分燃料噴霧における微粒化過程のモデリング査読

和田好充, 千田二郎

日本機械学会論文集(B編) 72 ( 724 ) 3113 - 3120 2006年12月

燃料の物理・化学的特性を駆使した低環境負荷型圧縮着火燃焼に関する研究

小橋好充

同志社大学 2006年11月

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