JPH02115925U

JPH02115925U -

Info

Publication number: JPH02115925U
Application number: JP2387489U
Authority: JP
Priority date: 1989-03-03
Filing date: 1989-03-03
Publication date: 1990-09-17

Description

[Brief explanation of drawings]

第１図は第１実施例のシステム全体を示す横断
平面図、第２図はその要部の詳細を拡大して示す
横断平面図、第３図は第２実施例の要部の詳細を
拡大して示す横断平面図である。１……機関本体、２……サージタンク、３ａ〜
３ｄ……スロツトル弁、４ａ〜４ｄ……燃料噴射
弁、５ａ〜５ｌ……吸気弁、６ａ〜５ｈ……排気
弁、７ａ〜７ｄ……点火栓、８ａ〜８ｄ……主吸
気通路、９ａ〜９ｄ……副吸気通路、１０……連
通管、１１……ＰＣＶバルブ、１３，１４……空
気通路、１５……ＩＳＣ弁、１６……電子式制御
ユニツト、１７，２０……エアアシスト通路、１
８，１９……分岐管、２２……開閉制御弁。 Fig. 1 is a cross-sectional plan view showing the entire system of the first embodiment, Fig. 2 is a cross-sectional plan view showing enlarged details of the main parts, and Fig. 3 is an enlarged cross-sectional plan view showing details of the main parts of the second embodiment. FIG. 1...Engine body, 2...Surge tank, 3a~
3d...Throttle valve, 4a-4d...Fuel injection valve, 5a-5l...Intake valve, 6a-5h...Exhaust valve, 7a-7d...Spark plug, 8a-8d...Main intake passage, 9a- 9d... Sub-intake passage, 10... Communication pipe, 11... PCV valve, 13, 14... Air passage, 15... ISC valve, 16... Electronic control unit, 17, 20... Air assist passage, 1
8, 19...branch pipe, 22...open/close control valve.

Claims

[Scope of utility model registration request]

a plurality of intake valves provided per cylinder; a main intake passage connected to the intake valve; a throttle valve provided in the main intake passage; a fuel injection valve provided in the main intake passage; A sub-intake passage opens behind one specific intake valve for each cylinder among the valves and receives air supply from at least the upstream side of the throttle valve, and each of the fuel injection valves has a plurality of sub-intake passages. The throttle valve has several injection holes and is connected to an air assist passage that receives air from the upstream side of the throttle valve.At least during low load operation, fuel is directed toward a specific intake valve having the sub-intake passage. 1. An intake system for an internal combustion engine having a plurality of intake valves, characterized in that the intake system is configured so as not to provide air assist to the nozzle holes that inject.