JPH0243408U

JPH0243408U -

Info

Publication number: JPH0243408U
Application number: JP12172488U
Authority: JP
Priority date: 1988-09-16
Filing date: 1988-09-16
Publication date: 1990-03-26

Description

[Brief explanation of drawings]

第１図は、本考案の実施例に係るエンジンの吸
気通路構造の要部の構成を示す一部切欠平面図、
第２図は、同断面図、第３図は、同実施例構造を
備えた多気筒エンジンの全体的な構成を示す平面
図である。１……シリンダブロツク部、２……シリンダヘ
ツド部、３ａ〜３ｆ……吸気ポート、４ａ〜４ｆ
……吸気マニホールド、５……サージタンク、６
……メイン吸気管、７……スロツトルホデー、９
……隔壁、１１……ボス部材、１１ａ……ボス部
、１２……吸気通路孔、１５……ベンチレーシヨ
ンパイプ、１５ａ……ベンチレーシヨンパイプの
開口端部、１６……吸気バイパスパイプ、２０…
…エンジン本体、２５……ベンチレーシヨンパイ
プ挿入孔部、２６……吸気バイパスパイプ挿入孔
部。 FIG. 1 is a partially cutaway plan view showing the configuration of main parts of an engine intake passage structure according to an embodiment of the present invention;
FIG. 2 is a sectional view of the same, and FIG. 3 is a plan view showing the overall configuration of a multi-cylinder engine having the structure of the embodiment. 1...Cylinder block part, 2...Cylinder head part, 3a to 3f...Intake port, 4a to 4f
...Intake manifold, 5...Surge tank, 6
...Main intake pipe, 7...Throttle body, 9
... Partition wall, 11 ... Boss member, 11a ... Boss part, 12 ... Intake passage hole, 15 ... Ventilation pipe, 15a ... Open end of ventilation pipe, 16 ... Intake bypass pipe, 20...
...engine body, 25...ventilation pipe insertion hole, 26...intake bypass pipe insertion hole.

Claims

[Scope of utility model registration request]

A thick wall portion projecting outward is formed on the wall of the intake passage upstream of the throttle valve, and an insertion hole for an intake bypass pipe is formed in the thick wall portion to form an intake bypass passage that bypasses the throttle valve, and the crankcase ventilation pipe insertion holes for forming ventilation passages in the crankcase that communicate the upstream side and the downstream side of the throttle valve through the ventilation pipes; An intake passage structure for an engine, wherein the shape of the intake passage of the ventilation pipe is formed into an angled shape having an opening end on the intake downstream side of the ventilation pipe insertion hole.