Výsledky vyhledávání - "Masakuni OIKAWA"

Akademický článek

Development of Oil Film Pressure Measurement System for Engine Sliding Parts

Autor: Masakuni Oikawa, Michiyasu Owashi, Yuji Mihara, Takashi Maeno

Publikováno v: Tribology Online, Vol 18, Iss 7, Pp 449-456 (2023)

Reduction of heat and mechanical losses is a critical factor in reducing CO2 emissions and fuel consumption of automotive engines. Toward that end, it is necessary to investigate the lubrication conditions of engine sliding surfaces and instantaneous

Externí odkaz: https://doaj.org/article/f2a4cf3559d64a9d910d5326346bbfb6

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Akademický článek

The Verification of Engine Analysis Model Accuracy by Measuring Oil Film Pressure in the Main Bearings of a Motorcycle High-Speed Engine Using a Thin-Film Sensor

Autor: Takumi Iwata, Masakuni Oikawa, Michiyasu Owashi, Yuji Mihara, Keisuke Ito, Yoshinari Ninomiya, Yohei Kato, Shinya Kubota

Publikováno v: Lubricants, Vol 10, Iss 11, p 314 (2022)

To improve the accuracy of the calculation analysis of crank journal bearings in motorcycle engines and accurately understand lubrication conditions, the oil film conditions of actual crankshafts and journal bearings should be measured. This research

Externí odkaz: https://doaj.org/article/867accfbd34541cdae0ed77f495a7249

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Akademický článek

Measurement of Piston Pin-Bore Oil Film Pressure under Engine Operation

Autor: Takumi Iwata, Michiyasu Owashi, Masakuni Oikawa, Yuji Mihara, Kunihiko Kobayashi, Naoki Yamakawa

Publikováno v: Lubricants, Vol 10, Iss 10, p 258 (2022)

Thin-film sensors were used to measure the oil film pressure distribution at the piston pin-bore interface in order to ascertain the stress distribution on the piston pin of a gasoline engine during actual operation. Thin-film sensors have been manuf

Externí odkaz: https://doaj.org/article/6ef60ac0b0ca45d8909a4e3489c7d65b

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Akademický článek

Research on evaluation of hydrogen jet behavior and assessment of cooling loss reduction by measuring local heat flux in direct injection hydrogen engines

Autor: Yoshihisa KOJIYA, Ryota SATO, Hiromi SAITO, Daijiro ISHII, Masakuni OIKAWA, Yasuo TAKAGI, Yuji MIHARA

Publikováno v: Nihon Kikai Gakkai ronbunshu, Vol 85, Iss 875, Pp 18-00427-18-00427 (2019)

The authors have proposed a new combustion process called the Plume Ignition Combustion Concept (PCC), in which a plume of the hydrogen jet is spark-ignited just after hydrogen is injected to accomplish combustion of a plume of rich mixture. With an

Externí odkaz: https://doaj.org/article/39e8fff380d840849d0416f680bfc0ec

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Akademický článek

Optimization of Hydrogen Jet Configuration by Single Hole Nozzle and High Speed Laser Shadowgraphy in High Pressure Direct Injection Hydrogen Engines

Autor: Masakuni Oikawa, Yusuke Ogasawara, Yoshikazu Kondo, Kanan Sekine, Yasuo Takagi, Yoshio Sato

Publikováno v: International Journal of Automotive Engineering, Vol 3, Iss 1, Pp 1-8 (2012)

A new ignition-combustion concept named PCC (Plume Ignition Combustion Concept), which ignite rich mixture plume in the middle of injection period or right after injection of hydrogen is completed, is proposed by the authors in order to reduce NOx em

Externí odkaz: https://doaj.org/article/23c85b8b673f46178f22a89ce39489b6

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Effect of supercharging on improving thermal efficiency and modifying combustion characteristics in lean-burn direct-injection near-zero-emission hydrogen engines

Autor: Masakuni Oikawa, Keisuke Goma, Yasuo Takagi, Yuji Mihara, Ryota Sato, Yoshihisa Kojiya

Publikováno v: International Journal of Hydrogen Energy. 47:1319-1327

The authors have proposed a new combustion process called the Plume Ignition Combustion Concept (PCC), in which with an optimal combination of hydrogen injection timing and controlled jet geometry, the plume of the hydrogen jet is spark-ignited to ac

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b99c6f163f378c6741a9b521414a4b85
https://doi.org/10.1016/j.ijhydene.2021.10.061

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Effect of modified combustion chamber configuration and enhanced squish flow on improving thermal efficiency in jet-plume-controlled direct-injection near-zero emission hydrogen engines

Autor: Masakuni Oikawa, Yuki Mogi, Mami Horiguchi, Keisuke Goma, Yasuo Takagi, Yuji Mihara

Publikováno v: International Journal of Engine Research. :146808742211352

In direct injection hydrogen engines, the Plume Ignition and Combustion Concept (PCC) developed by the authors has been applied to improve thermal efficiency and reduce NOx emissions under high-load operation. The PCC combustion method burns an optim

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cabf082506587af6de067bacf3b6cc9e
https://doi.org/10.1177/14680874221135277

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Near-zero emissions with high thermal efficiency realized by optimizing jet plume location relative to combustion chamber wall, jet geometry and injection timing in a direct-injection hydrogen engine

Autor: Yoshihisa Kojiya, Yuji Mihara, Yasuo Takagi, Ryota Sato, Masakuni Oikawa

Publikováno v: International Journal of Hydrogen Energy. 44:9456-9465

Thermal efficiency was substantially improved and NOx emissions were reduced to a level at a single-digit ppm with PCC combustion by optimizing such characteristics as the direction, number and diameter of the injected jet and controlling the injecti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::63b84b13bb6d5c1b4806aa8dc9440e52
https://doi.org/10.1016/j.ijhydene.2019.02.058

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