Title:
COMBUSTION CHAMBER STRUCTURE FOR DIRECT-INJECTION ENGINE
Document Type and Number:
Japanese Patent JP2016121630
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 internal of the combustion chamber 17 is constructed so that, in a longitudinal section cut by a plane passing through the injection front end of the fuel injection valve and the front end of the discharge electrode, the wall face shape of the cavity on the side of the discharge electrode arranged across the injection front end has a longer distance from the injection front end than the wall face shape of the cavity on the opposite side.SELECTED DRAWING: Figure 2
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Inventors:
NARAHARA KAZUAKI
OOTA MUNEYUKI
NOO YOSHIHISA
KAGEYAMA AKIRA
OOTA MUNEYUKI
NOO YOSHIHISA
KAGEYAMA AKIRA
Application Number:
JP2014262406A
Publication Date:
July 07, 2016
Filing Date:
December 25, 2014
Export Citation:
Assignee:
MAZDA MOTOR
International Classes:
F02B23/08; F02B23/10; F02F3/26
Domestic Patent References:
| JPH11200867A | 1999-07-27 | |||
| JPH10131758A | 1998-05-19 | |||
| JP2005139988A | 2005-06-02 | |||
| JP2013194644A | 2013-09-30 |
Attorney, Agent or Firm:
Maeda patent office