Title:
COMBUSTION CHAMBER STRUCTURE FOR DIRECT-INJECTION ENGINE
Document Type and Number:
Japanese Patent JP2016121631
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a combustion chamber structure for a direct-injection engine constructed to form a mixture layer and a heat insulation gas layer in a combustion chamber constructed by a cavity, which inhibits fuel spray injected at a predetermined spray angle from contacting the wall face of the cavity because the fuel spray has a longer flying distance in a specified direction.SOLUTION: A fuel injection valve 6 is arranged in a ceiling part 170 of a cylinder head, and the front end of a discharge electrode (an ignition plug 7) is arranged adjacent to the injection front end thereof. In the ceiling part, a recess 131 is provided for storing the front end of the discharge electrode. The center of a cavity 163 provided in a piston 16 is shifted from the bore center of a cylinder. The fuel injection valve is constructed so that the center axis of the fuel spray injected at a predetermined spray angle is inclined with respect to a line between the center of the cavity when the piston is at a top dead center and the injection front end, in the direction of approaching the front end of the discharge electrode.SELECTED DRAWING: Figure 2
Inventors:
NARAHARA KAZUAKI
OOTA MUNEYUKI
NOO YOSHIHISA
KAGEYAMA AKIRA
OOTA MUNEYUKI
NOO YOSHIHISA
KAGEYAMA AKIRA
Application Number:
JP2014262407A
Publication Date:
July 07, 2016
Filing Date:
December 25, 2014
Export Citation:
Assignee:
MAZDA MOTOR
International Classes:
F02B23/10; F02B23/08
Domestic Patent References:
| JP2007270654A | 2007-10-18 | |||
| JPS6287169U | 1987-06-03 | |||
| JP2005188305A | 2005-07-14 | |||
| JP2013194712A | 2013-09-30 | |||
| JP2007113464A | 2007-05-10 | |||
| JP2013057267A | 2013-03-28 | |||
| JP2011220285A | 2011-11-04 | |||
| JPS5856117U | 1983-04-16 |
Foreign References:
| WO2013035272A1 | 2013-03-14 |
Attorney, Agent or Firm:
Maeda patent office