COMBUSTION SYSTEM FOR DIRECT INJECTION DIESEL ENGINES

Title:

COMBUSTION SYSTEM FOR DIRECT INJECTION DIESEL ENGINES

Document Type and Number:

WIPO Patent Application WO/2000/020735

Kind Code:

A1

Abstract:

A combustion system for direct injection diesel engines, having a fuel injection nozzle (N) provided with upper and lower rows of nozzle holes and disposed so as to be opposed to a deep dish combustion chamber (A) of a small opening ratio, wherein the directions of the nozzle holes (1) in the upper row and those of the nozzle holes (2) in the lower row are set so that a fuel injected from the nozzle holes (1) and (2) impinges upon a side wall (3) and a bottom surface (4) respectively of the combustion chamber (A), a ratio of a fuel spray travel from the nozzle holes in the upper row to a diameter of each of these nozzle holes being set to 150-250, a ratio of a fuel spray travel from the nozzle holes in the lower row to a diameter of each of these nozzle holes being set to 100-180, a ratio of a total area of all of the nozzle holes in the lower row to that of all of the nozzle holes in the upper and lower rows being set to 0.25-0.35, the number of the upper nozzle holes (1) being set twice as large as that of the lower nozzle holes (2).

Inventors:

YOSHIKAWA SHIGERU (JP)
AKIMOTO SEITA (JP)
HAMAOKA SHUNJI (JP)

Application Number:

PCT/JP1998/004502

Publication Date:

April 13, 2000

Filing Date:

October 05, 1998

Export Citation:

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Assignee:

YANMAR DIESEL ENGINE CO (JP)
YOSHIKAWA SHIGERU (JP)
AKIMOTO SEITA (JP)
HAMAOKA SHUNJI (JP)

International Classes:

F02B23/02; F02B23/06; F02M61/18; F02B3/06; (IPC1-7): F02B23/02; F02B23/06; F02M61/18

Foreign References:

JPH08200186A	1996-08-06
JPH0821245A	1996-01-23
JPH0431651A	1992-02-03
JPH03149315A	1991-06-25
JPH0188027U	1989-06-09
JPS6093115A	1985-05-24

Other References: