EFFECTS OF COMBUSTION CHAMBER GEOMETRY IN A DIRECT-INJECTION DIESEL ENGINE (COMPARISON OF RE-ENTRANT AND CONVENTIONAL CHAMBERS).

Yasuhiro Daisho, Takeshi Saito, Nobuyuki Ikeya

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Two conventional combustion chamber types and a re-entrant type of direct-injection diesel engine were compared in order to investigate the effects of heat transfer and in-cylinder flow associated with the combustion chamber geometry on combustion itself, engine performance and exhaust gas emissions. Heat transfer calculation and heat release analyses have shown that the re-entrant chamber tends to reduce ignition lag due to the higher chamber wall temperatures. In-cylinder flow measurements using hot wire anemometry have indicated that the re-entrant chamber generates a higher turbulence level, particularly around the top dead center, causing an increase in the rate of heat release. Thus, the re-entrant chamber can favorably improve both fuel economy and smoke, even though fuel injection timing is retarded to reduce NO//x emission.

Original languageEnglish
Pages (from-to)2768-2773
Number of pages6
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume52
Issue number479
Publication statusPublished - 1986 Jul
Externally publishedYes

Fingerprint

diesel engines
Direct injection
Engine cylinders
combustion chambers
Combustion chambers
Diesel engines
chambers
injection
Heat transfer
Geometry
Fuel injection
Flow measurement
Fuel economy
Exhaust gases
geometry
Gas emissions
Smoke
Ignition
Turbulence
heat transfer

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

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abstract = "Two conventional combustion chamber types and a re-entrant type of direct-injection diesel engine were compared in order to investigate the effects of heat transfer and in-cylinder flow associated with the combustion chamber geometry on combustion itself, engine performance and exhaust gas emissions. Heat transfer calculation and heat release analyses have shown that the re-entrant chamber tends to reduce ignition lag due to the higher chamber wall temperatures. In-cylinder flow measurements using hot wire anemometry have indicated that the re-entrant chamber generates a higher turbulence level, particularly around the top dead center, causing an increase in the rate of heat release. Thus, the re-entrant chamber can favorably improve both fuel economy and smoke, even though fuel injection timing is retarded to reduce NO//x emission.",
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AU - Ikeya, Nobuyuki

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AB - Two conventional combustion chamber types and a re-entrant type of direct-injection diesel engine were compared in order to investigate the effects of heat transfer and in-cylinder flow associated with the combustion chamber geometry on combustion itself, engine performance and exhaust gas emissions. Heat transfer calculation and heat release analyses have shown that the re-entrant chamber tends to reduce ignition lag due to the higher chamber wall temperatures. In-cylinder flow measurements using hot wire anemometry have indicated that the re-entrant chamber generates a higher turbulence level, particularly around the top dead center, causing an increase in the rate of heat release. Thus, the re-entrant chamber can favorably improve both fuel economy and smoke, even though fuel injection timing is retarded to reduce NO//x emission.

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