JPH0327829U

JPH0327829U -

Info

Publication number: JPH0327829U
Application number: JP7477690U
Authority: JP
Priority date: 1990-07-13
Filing date: 1990-07-13
Publication date: 1991-03-20
Anticipated expiration: 2000-09-09
Also published as: JP2524920Y2

Description

[Brief explanation of drawings]

第１図１は本考案の第１実施例の断面図、第１
図２は上記実施例のピストンの平面図、第２図１
は上記実施例のキヤビテイ形状と燃料噴射方向と
を示す線図、第２図２は燃料噴射開始および終了
時のピストン位置を示す線図、第３図１は上記第
１実施例の第１変形例に係るピストンの平面図、
第３図２は上記第１変形例の縦断面図、第４図１
は上記第１実施例の第２変形例に係るピストンの
平面図、第４図２は第４図１の−線断面図、
第５図１は上記第１実施例の第３変形例に係るピ
ストン平面図、第５図２は第５図１の−線断
面図、第６図１は上記第１実施例の第４変形例に
係るピストンの平面図、第６図２は第６図１の
−線断面図、第７図１は上記第１実施例の第５
変形例に係るピストンの平面図、第７図２は第７
図１の−線断面図である。１２……ピストン、１４……第１の凹所、１６
……第２の凹所、２２……点火栓、２４……燃料
噴射弁。 FIG. 1 is a sectional view of the first embodiment of the present invention.
FIG. 2 is a plan view of the piston of the above embodiment, FIG.
2 is a diagram showing the cavity shape and fuel injection direction of the above embodiment, FIG. 2 is a diagram showing the piston position at the start and end of fuel injection, and FIG. 3 1 is a first modification of the above first embodiment. A plan view of a piston according to an example,
FIG. 3 2 is a longitudinal sectional view of the first modification, and FIG. 4 1
is a plan view of a piston according to a second modification of the first embodiment, FIG. 42 is a sectional view taken along the line - in FIG. 41,
FIG. 5 1 is a plan view of a piston according to a third modification of the first embodiment, FIG. 5 2 is a cross-sectional view taken along the line - - of FIG. 5 1, and FIG. 6 1 is a fourth modification of the first embodiment. FIG. 6 is a plan view of the piston according to the example, FIG.
FIG. 7 is a plan view of a piston according to a modified example.
FIG. 2 is a sectional view taken along the - line in FIG. 1 . 12... Piston, 14... First recess, 16
... second recess, 22 ... spark plug, 24 ... fuel injection valve.

Claims

[Claims for Utility Model Registration] A first recess for holding a combustible mixture, a second recess for holding excess air or a mixture leaner than the combustible mixture, and the first recess and the first recess. A single combustion chamber space is formed by a communication passage that communicates with the two recesses and acts as a throttle, and the piston is at the top dead center around the combustion chamber space and between the piston and the cylinder head. A squeeze area is provided that provides a narrow clearance when the engine is positioned so that the fuel injected according to the engine load is directed from the second recess side to the wall surface forming the first recess via the communication path. The fuel injection device is disposed at the first point, and when the piston is located at the top dead center, the ignition point is
A direct injection internal combustion engine in which an ignition device is arranged so as to be located in a recess, wherein the first recess is formed by recessing the top surface of the piston, and the second recess is formed by recessing the top surface of the piston. by recessing the first
The communication path is formed near the recess of the first recess, and the communication path is formed by recessing the central part of the top surface.
The width of the communicating path in the orthogonal direction perpendicular to the arrangement direction of the first recess and the second recess is narrower than the smaller of the maximum width of the opening of the first recess in the same direction as the orthogonal direction and the maximum width of the opening of the second recess in the same direction as the orthogonal direction; A direct injection internal combustion engine characterized by being formed to be wider than the width of fuel injection from a fuel injection device.