JPH0169128U

JPH0169128U -

Info

Publication number: JPH0169128U
Application number: JP1987164744U
Authority: JP
Priority date: 1987-10-27
Filing date: 1987-10-27
Publication date: 1989-05-08
Anticipated expiration: 2002-10-27
Also published as: JPH0639090Y2

Description

[Brief explanation of the drawing]

第１図は本考案の実施例に係るエンジンの吸気
装置の要部側面図、第２図は第１図の―矢視
図、第３図は第１図の―縦断面図、第４図は
第１図の―矢視図、第５図は第１図に示した
制御弁の拡大縦断面図、第６図は第５図の―
縦断面図、第７図は第５図の―縦断面図であ
る。１……エンジン、２……吸気マニホールド、３
……吸気通路ブロツク、４……サージタンクブロ
ツク、５……スロツトルボデイ、６……吸気管、
７……制御弁、１０，２０……吸気通路群、１１
，２１……第１の独立吸気通路、１２，１５，２
２，２５……上流側通路部、１３，１６，２３，
２６……下流側通路部、１４，２４……第２の独
立吸気通路、１７，２７……合流点、３１……サ
ージタンク、３５〜３８……吸気導入路、４０…
…バルブケース、４１……ケース本体、４２……
弁体、４３，４４……弁通路、４７〜４９……凹
部、５０……リブ、５１〜５３……容積部。 FIG. 1 is a side view of essential parts of an engine intake system according to an embodiment of the present invention, FIG. 2 is a view taken along the arrow in FIG. 1, FIG. 3 is a vertical cross-sectional view of FIG. 1, and FIG. is a view in the direction of the arrow in FIG. 1, FIG. 5 is an enlarged vertical sectional view of the control valve shown in FIG. 1, and FIG. 6 is a view in the direction of the arrow in FIG.
7 is a longitudinal sectional view of FIG. 5. 1...Engine, 2...Intake manifold, 3
...Intake passage block, 4...Surge tank block, 5...Throttle body, 6...Intake pipe,
7... Control valve, 10, 20... Intake passage group, 11
, 21...first independent intake passage, 12, 15, 2
2, 25...upstream passage section, 13, 16, 23,
26... Downstream passage section, 14, 24... Second independent intake passage, 17, 27... Merging point, 31... Surge tank, 35-38... Intake introduction path, 40...
...Valve case, 41...Case body, 42...
Valve body, 43, 44... Valve passage, 47-49... Recessed portion, 50... Rib, 51-53... Volume portion.

Claims

[Scope of utility model registration request]

For one cylinder, a first independent intake passage opens to introduce intake air only in a high load operating range of the engine, and a second independent intake passage opens to introduce intake air throughout the entire load range of the engine. An intake system for an engine in which the first independent intake passage and the second independent intake passage are connected to each other, and above the engine, the independent intake passages are disposed so as to intersect with each other when viewed from the vertical direction. Among the passages, the first independent intake passage extends in the upper part of the engine in a substantially horizontal direction, while the second independent intake passage extends from the first independent intake passage at the intersection with the first independent intake passage. An intake system for an engine, characterized in that the first independent intake passage is curved in the vertical direction so as to bypass the independent intake passage, and then extends in a substantially horizontal direction at substantially the same height as the first independent intake passage.