JPH041670U

JPH041670U -

Info

Publication number: JPH041670U
Application number: JP3993890U
Authority: JP
Priority date: 1990-04-13
Filing date: 1990-04-13
Publication date: 1992-01-08

Description

[Brief explanation of the drawing]

第１図は本考案によるエンジンの吸気装置を示
す概略構成図、第２図は第１図の−断面概略
図、第３図は第１図のＸ矢視図、第４図は実施例
の一部断面した斜視図である。１……シリンダヘツド、１ａ……燃焼室、３，
４……第１、第２吸気バルブ、３ａ，４ａ……第
１、第２吸気バルブ孔、３ｂ，４ｂ……第１、第
２吸気ポート、３ｂ_１……狭通路、３ｂ_２……広
通路、４ｂ_１……ガイド部、７……分岐部、８…
…隔壁、９……吸気管、９ａ……開口部、１０…
…スワールコントロールバルブ、１０ａ……端縁
、１１……インジエクタ、１１ａ……ノズル先端
部、１１ｂ……凹部、１１ｃ……空気導入口。 FIG. 1 is a schematic configuration diagram showing an engine intake system according to the present invention, FIG. 2 is a schematic cross-sectional view of FIG. 1, FIG. 3 is a view taken in the direction of the X arrow in FIG. FIG. 2 is a perspective view partially cut away. 1...Cylinder head, 1a...Combustion chamber, 3,
4...First and second intake valves, 3a, 4a...First and second intake valve holes, 3b, 4b...First and second intake ports, 3b ₁ ...Narrow passage, 3b ₂ ...Wide Passageway, 4b ₁ ...Guide part, 7...Branch part, 8...
...Partition wall, 9...Intake pipe, 9a...Opening, 10...
...Swirl control valve, 10a...edge, 11...injector, 11a...nozzle tip, 11b...recess, 11c...air inlet.

Claims

[Claims for Utility Model Registration] Forming a Siamese port having a first intake port and a second intake port branching from the downstream side of the intake port opening of a cylinder head having first and second intake valves per cylinder. and an intake port of the engine, wherein a partition is formed between the first intake port and the intake port opening to provide a narrow passage and a wide passage, and an injector is disposed in the narrow passage. A swirl control valve is provided that fully closes the wide passage and the narrow passage when the system is idling, and the swirl control valve is configured to operate on the wide passage side of the swirl control valve within a predetermined opening range from the fully closed state to the low load range. A guide portion is formed on the wide passage side corresponding to the end edge, a partition formed in the first intake port is formed in the vertical direction of the cylinder head, and the downstream side of the partition is formed in the first intake valve. The cross-sectional area of the narrow passage is gradually reduced from the upstream side to the downstream side, and the narrow passage side of the first intake port is located near the valve hole of the first intake valve. an injector is disposed in the injector, and the tip of the injector is exposed in the narrow passage, and the injector is arranged such that the injection direction of the injector is aligned with the first intake valve and the valve seat when the first intake valve is fully open. a recess is formed in the cylinder head in which a nozzle tip of the injector is exposed to the narrow passage, and the fuel injection timing of the injector is set during the intake stroke of the engine; An air intake device for an engine, characterized in that an air inlet is provided in the air inlet, and the air inlet is communicated with an opening that opens upstream when the swirl control valve is fully closed.