SPARK IGNITION TYPE DIRECT INJECTION ENGINE

Title:

SPARK IGNITION TYPE DIRECT INJECTION ENGINE

Document Type and Number:

Japanese Patent JP3835289

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To improve ignition stability in the case of small amount of fuel injection while using advantage of multi-ignition type fuel injection valve allowing realization of good combustion to a relatively high load side, and to prevent increase of smoke while securing sufficient output in a high-speed and high load region, in a spark ignition type direct injection engine 1 in which fuel atomization is guided around an ignition plug 16 by a wall surface of a cavity 5a disposed in a crown surface of a piston 5 to be laminated.
SOLUTION: Seven nozzle holes 52 are elliptically arranged at the tip 54a of an injector 18 disposed every cylinder 2 of the engine 1. They are set so that the longitudinal direction of the ellipse V formed by interconnecting the nozzle holes 52 is a cylinder column direction of the engine 1. The fuel atomization S integrally formed by the fuels injected from respective nozzle holes 52 has a relation that α=approximately 25° to 35°, β=approximately 35° to 45°, and β>α+approximately 10°, where α is expansion angle in the direction of the cylinder center line Z, and β is expansion angle in the cylinder column direction.

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Inventors:

Hidetoshi Kudo
Tomohisa Fujikawa
Toshige Takashi

Application Number:

JP2002004099A

Publication Date:

October 18, 2006

Filing Date:

January 11, 2002

Export Citation:

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Assignee:

Mazda Corporation Inc

International Classes:

F02B17/00; F02M61/18; F02B23/10; F02F3/26; F02M51/06; (IPC1-7): F02M61/18; F02B17/00; F02B23/10; F02F3/26; F02M51/06

Domestic Patent References:

JP2000120467A
JP2001271650A
JP2000038974A
JP11270440A
JP11062787A
JP2000303935A
JP2003201846A
JP2004519624A

Attorney, Agent or Firm:

Hiroshi Maeda
Hiroshi Koyama
Hiroshi Takeuchi
Takahisa Shimada
Yuji Takeuchi
Katsumi Imae
Teshima Masaru
Atsushi Fujita

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