JPS634329U

JPS634329U -

Info

Publication number: JPS634329U
Application number: JP9784386U
Authority: JP
Priority date: 1986-06-26
Filing date: 1986-06-26
Publication date: 1988-01-12
Anticipated expiration: 2001-06-26
Also published as: JPH0511297Y2

Description

[Brief explanation of the drawing]

図面は本考案の実施例を示し、第１図は第１実
施例を示すピストンヘツドの平面図、第２図はピ
ストンヘツド周辺の縦断右側面図、第３図は縦形
デイーゼルエンジンの要部縦断右側面図、第４図
は噴口の模式図、第５図は第２実施例を示すピス
トンヘツドの縦断右側面図、第６図は第３実施例
を示す第５図相当図、第７図は第４実施例を示す
第５図相当図である。１…主燃焼室、２…噴口、３…うず室、４…２
の軸心、５…２の左右両側面、６…ピストン、７
…凹み、８…ピストンヘツド、１０…７の始端部
、１２…７の終端部、１００…７の底面、１０１
…７の１２に近い部分、１０２…７の１０に近い
部分、Ａ…７の長さ方向、Ｅ…デイーゼルエンジ
ン。 The drawings show an embodiment of the present invention; Fig. 1 is a plan view of a piston head showing the first embodiment, Fig. 2 is a vertical right side view of the vicinity of the piston head, and Fig. 3 is a longitudinal sectional view of the main part of a vertical diesel engine. 4 is a schematic diagram of the nozzle, FIG. 5 is a longitudinal sectional right side view of the piston head showing the second embodiment, FIG. 6 is a view equivalent to FIG. 5 showing the third embodiment, and FIG. 5 is a diagram corresponding to FIG. 5 showing the fourth embodiment. 1...Main combustion chamber, 2...Nozzle port, 3...Wirl chamber, 4...2
Axis center, 5...Both left and right sides of 2, 6...Piston, 7
... recess, 8... piston head, 10... starting end of 7, 12... terminal end of 7, 100... bottom surface of 7, 101
...Part of 7 near 12, 102...Part of 7 near 10, A...Longitudinal direction of 7, E...Diesel engine.

Claims

[Scope of utility model registration request]

A whirlpool chamber 3 is connected to an eccentric point of the main combustion chamber 1 of the diesel engine E through a jet nozzle 2, and the axis 4 of the jet nozzle 2 moves closer to the center of the main combustion chamber 1 as it approaches the main combustion chamber 1 from the whirlpool chamber 3. Swirl chamber combustion in a diesel engine is oriented in a sloping manner, and both left and right sides 5 of the nozzle 2 are tapered so that the left and right sides of the combustion air expanding in the vortex chamber 3 are widened to the left and right at an angle. In the main combustion chamber 1, a recess 7 for guiding the combustion air jetted from the nozzle 2 near the top dead center of the piston 6 forward in the main combustion chamber 1 with the above-mentioned divergence angle is formed in the piston head 8, and from the starting end 10 to the tip 12. The starting end 10 of the recess 7 is formed into a shape that becomes shallower while widening left and right as it progresses to the nozzle 2.
, the rate of change in the depth of the bottom surface 100 of the recess 7 in the longitudinal direction A is small in a portion 101 near the tip 12 of the recess 7, and larger in a portion 102 closer to the starting end 10 than this portion. A swirl chamber type combustion chamber of a diesel engine characterized by being configured so as to.