研究者詳細 - 河原　伸幸

MISC - 河原　伸幸

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Diluted and Stoichiometric Combustion of Dual Fuel (Methane and Gas Oil) Engine with HCCI Concept

Tomita, E, Kawahara, N

Lean Combustion Technology II, Engineering Foundation 2004年

定容容器内燃料－空気混合気の燃焼に及ぼす旋回乱流場および層状燃料濃度場の影響（第2報，燃料濃度場および乱流場が燃焼特性に及ぼす影響

西山淳, 冨田栄二, 河原伸幸, 吉山定見, 浜本嘉輔

日本機械学会論文集 (B編), 70 ( 692 ) 1092 - 1099 2004年

記述言語：日本語

A swirling flow and rich fuel concentration near the center were produced in a vessel by tangentially charging air and fuel injection. Propane was used as fuel. Fuel concentration distribution was measured with laser induced fluorescence (LIF) method using acetone as a tracer. It was confirmed that the center-rich stratified fuel concentration was produced. In order to estimate the pattern of the fuel concentration field, the Gaussian fitting method was applied to the equivalence ratio profile. Fuel distribution history obtained from LIF measurement agreed with the calculation result using axisymmetric diffusion equation. The initial stage of combustion was greatly affected by the fuel concentration distribution in the vicinity of the spark location. The stronger turbulence intensity accelerated combustion and main combustion became shorter under the same fuel distribution conditions.

DOI： 10.1299/kikaib.70.1092

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in Situ Fuel Concentration Measurement near Spark Plug by 3.39 m Infrared Absorption Method (Application to a Port Injected Lean-Burn Engine)

Nishiyama, A., *Kawahara, N. Tomita, E. Fujiwara, M. Ishikawa, N. Kamei, K. Nagashima, K

SAE 2004 World Congress, 2004年

記述言語：英語

In this study, a spark plug sensor for in-situ fuel concentration measurement was applied to a port injected lean-burn engine. Laser infrared absorption method was employed and a 3.392 μm He-Ne laser that coincides with the absorption line of hydrocarbons was used as a light source. In this engine, the secondary valve lift height of intake system was controlled to obtain appropriate swirl and tumble flow in order to achieve lean-burn with the characteristics of intake flow. For such in-cylinder stratified mixture distribution, the fuel concentration near the spark plug is very important factor that affects the combustion characteristics. Therefore, the mixture formation process near the spark plug was investigated with changing fuel injection timing. Under the intake stroke, the timing that fuel passed through near the spark plug depended largely on the fuel injection timing. Under the compression stroke, mixture formation process near the spark plug indicated different characteristics with injection timings. As the injection timing was retarded, rich mixture remained near the top of the combustion chamber. Furthermore, the relation between the fuel concentration near the spark plug and the combustion characteristics was discussed. The initial combustion became faster and the coefficient of variation in IMEP became lower as the rich mixture existed near the spark plug. Copyright © 2004 SAE International.

DOI： 10.4271/2004-01-1353

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LDV，PDAの基礎と応用

河原伸幸

No.04-45講習会基礎教育講習会‐エンジンにおける実験・計測の基礎と応用（その 9），日本機械学会エンジンシステム部門， pp.11-18 2004年

赤外線吸収法を利用した点火栓近傍燃料濃度センサの開発

冨田栄二, 河原伸幸

工業加熱， Vol.41, No.3, pp.10-16 ( 3 ) 10 - 16 2004年

レーザ計測によるエンジン内諸現象の観察

河原伸幸

若手研究最前線，エンジンテクノロジー， No.30,pp.52-59 ( 1 ) 52 - 59 2004年

LDV，PDAの基礎と応用

河原伸幸

No.03-101講習会基礎教育講習会‐エンジンにおける実験・計測の基礎と応用（その 8），日本機械学会エンジンシステム部門， pp.11-18 2004年

インジェクタのノズル近傍における噴霧形成過程の可視化

河原伸幸

第12回微粒化フォーラム「噴霧特性の測定原理と実習」テキスト， pp.37-43 2004年

Real Time HC Concentration Measurement in Exhaust Gas from A Spark-Ignition Engine by Using 3.392 m Absorption Method

Tomita, E, Kawahara, N

Journal of KONES International Combustion Engines, 2004年

Characteristics of Combustion and Exhaust Emissions in a Dual Fuel Engine with HCCI Concept -Diluted and Stoichiometric Combustion-

Tomita, E, Kawahara, N

Homogeneous Charge Compression Ignition Symposium 2004年

超音波浮揚場における液滴近傍の音響流解析

河原伸幸, 冨田栄二, 江種元

微粒化シンポジウム講演論文集 = Symposium (ILASS-Japan) on Atomization 12 335 - 339 2003年12月

スワールインジェクタのノズル出口における液膜分裂状態の可視化

河原伸幸, 冨田栄二, 笠原大輔

微粒化シンポジウム講演論文集 = Symposium (ILASS-Japan) on Atomization 12 249 - 253 2003年12月

In situ Measurement of Hydrocarbon Fuel Concentration near a Spark Plug in an Engine Cylinder by 3.392 m Infrared Laser Absorption Method - Application to Actual Engine -

Tomita, E, Kawahara, N, Nishiyama, A, Shigenaga, M

Measurement Science and Technology 14 ( 8 ) 1357 - 1363 2003年8月

ガソリンインジェクタのノズル近傍における噴霧形成過程の可視化

河原伸幸, 冨田栄二, 中山崇

可視化情報学会誌. Suppl. 23 ( 1 ) 49 - 52 2003年7月

709 小型 2 ストロークエンジンの不整燃焼改善に関する研究

冨田栄二, 中谷光伸, 河原伸幸, 稲毛克紀

講演論文集 2003 ( 41 ) 227 - 228 2003年2月

703 非定常ジメチルエーテル噴霧の挙動に関する研究

河原伸幸, 冨田栄二, 赤澤定樹

講演論文集 2003 ( 41 ) 215 - 216 2003年2月

Homogeneous charge compression ignition combustion with dimethyl ether - Spectrum analysis of chemiluminescence

Nobuyuki Kawahara, Eiji Tomita, Hisashi Kagajyo

SAE Technical Papers 2003年

記述言語：英語

Homogeneous Charge Compression Ignition (HCCI) combustion with dimethyl ether has been carried out in a single cylinder engine with a transparent piston. The engine was operated at 800 rpm with a wide-open throttle. The intake-premixed mixture was preheated with an electric heater to promote auto-ignition. HCCI combustion with dimethyl ether indicates multi-stage heat releases. Investigations were conducted with visualization of combustion in the cylinder and detailed and temporal spectroscopic measurements using spectrometer. In order to understand reaction mechanism of auto-ignition and combustion mechanism in HCCI engine, spectrum analysis of chemiluminescence was carried out. Three main conclusions were drawn from this study. (1) Spectrum from chemiluminescence at low temperature oxidation was obtained successfully using developed optical fiber probe. (2) Emitting lights from HCHO according to Emeléous's cool flame bands appear at low temperature reaction. (3) During the main heat release, the CO-O recombination spectrum was strong. There was a strong correlation between rate of heat release and the CO-O recombination spectrum. Copyright © 2003 Society of Automotive Engineers of Japan, Inc.

DOI： 10.4271/2003-01-1828

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水素を用いた内燃機関の新燃焼法に関する研究

河原伸幸

（財）実吉奨学会，平成13年度研究報告集 Vol.20, pp.35-38 2003年

LDA，PDAの基礎と応用（応用例：噴霧粒子径および速度の同時計測など），

河原伸幸

第89回講習会エンジニアのための基礎からのレーザ応用最新技術，日本機械学会中国四国支部 pp.23-30 2003年

多種噴霧／工業分野

河原伸幸

微粒化 Vol.12, No.39, pp.105-107 2003年

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