Title:
TILT-TYPE FUEL INJECTION VALVE
Document Type and Number:
Japanese Patent JP3737167
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To uniformalize ratios of air to fuel in respective combustion regions, and to decrease concentration of exhaust gas in low speed and high load, by correcting respective angles so that a nozzle hole forward from the tile direction of a valve may face upward and a nozzle hole rearward may face downward, and by equalizing the angles of all nozzle holes in relation to a cylinder.
SOLUTION: In a tilt-type fuel injection valve in which a valve shaft VC direction is tilted in relation to the cylinder axial direction at the tilt angle α, when the angles of all nozzle holes in relation to a cylinder axis are to be equalized to that of a vertical injection valve, the angle of the nozzle hole forward from the tilt direction of the valve in relation to the valve shaft is taken as β3, and β=β1-α', β3=β1+α" (0<'', 0<α"<α). Therefore, the angles of all nozzle holes in relation to a cylinder is geometrically equalized to each other (all angles are β1), however, the upper displacement angle Δβ in the spray direction is made different according to the angle in relation to the valve shaft. The angle of the nozzle hole forward from the tilt direction of the valve in relation to the valve shaft is corrected to β2+Δβ2, and the angle of the rear nozzle hole in relation to the valve shaft is corrected to β3-Δβ3'.
Inventors:
Katsuhiko Nagakura
Yasuhiro Ozaki
Kenji Shiga
Yasuhiro Ozaki
Kenji Shiga
Application Number:
JP21755795A
Publication Date:
January 18, 2006
Filing Date:
August 25, 1995
Export Citation:
Assignee:
Yanmar Co., Ltd.
International Classes:
F02M61/14; F02B23/06; F02M61/18; F02B3/06; (IPC1-7): F02M61/14; F02B23/06; F02M61/18; F02M61/18
Domestic Patent References:
| JP7035002A | ||||
| JP60098161A | ||||
| JP59021082U | ||||
| JP59090072U | ||||
| JP4109473U |
Attorney, Agent or Firm:
Juichiro Yano