JPS6254235U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の第１実施例に係るエンジンの
吸気装置の平面図、第２図は第１図の側面図、第
３図乃至第６図は第１図の―線乃至―線
に沿う断面図、第７図は第６図の―線に沿う
断面図、第８図は第１図乃至第７図に示した隔壁
と第３スロツトル弁との関係を示す斜視図、第９
図は第１図乃至第８図に示した吸気装置の概略的
な説明図、第１０図は第１図乃至第９図に示した
スロツトル弁の駆動機構の説明図、第１１図は第
１実施例の吸気特性曲線図、第１２図は第１実施
例の弁開度特性線図、第１３図は本考案の第２実
施例を示すエンジンの吸気装置の部分断面図、第
１４図は第１３図のスロツトル弁が全開したとき
の断面図、第１５図は第１３図の―線に
沿う断面図、第１６図は第２実施例の吸気特性曲
線図、第１７図は第２実施例の弁開度特性線図で
ある。 Ａ：第１独立吸気通路、Ｂ：第２独立吸気通路
、Ｃ：第１バイパス通路、Ｄ：第２バイパス通路
、２９，５２：隔壁、３２，５５：第１スロツト
ル弁、３３，５６：第２スロツトル弁、３４，５
７：弁配設孔、３５，６０：第３スロツトル弁。 1 is a plan view of an engine intake system according to a first embodiment of the present invention, FIG. 2 is a side view of FIG. 1, and FIGS. 3 to 6 are taken along lines from - to - in FIG. 7 is a sectional view taken along line - in FIG. 6, FIG. 8 is a perspective view showing the relationship between the partition wall shown in FIGS. 1 to 7 and the third throttle valve, and FIG.
The figure is a schematic explanatory diagram of the intake system shown in FIGS. 1 to 8, FIG. 10 is an explanatory diagram of the throttle valve drive mechanism shown in FIGS. 1 to 9, and FIG. FIG. 12 is a valve opening characteristic curve diagram of the first embodiment, FIG. 13 is a partial sectional view of an engine intake system showing a second embodiment of the present invention, and FIG. 14 is a diagram of the intake characteristic curve of the embodiment. Fig. 13 is a sectional view when the throttle valve is fully open, Fig. 15 is a sectional view taken along the line - in Fig. 13, Fig. 16 is an intake characteristic curve diagram of the second embodiment, and Fig. 17 is a diagram of the second embodiment. It is a valve opening degree characteristic diagram of an example. A: first independent intake passage, B: second independent intake passage, C: first bypass passage, D: second bypass passage, 29, 52: partition wall, 32, 55: first throttle valve, 33, 56: first 2 throttle valve, 34,5
7: Valve installation hole, 35, 60: Third throttle valve.

Claims (1)

【実用新案登録請求の範囲】 点火順序の隣り合わない気筒同士、２つの気筒
群のグループに分された一方のグループの気筒群
に連通する第１独立吸気通路と、 他のグループの気筒群に連通する第２独立吸気
通路と、 前記第１独立吸気通路に配設された第１のスロ
ツトル弁と、 前記第２独立吸気通路に配設され、前記第１の
スロツトル弁と同期して開閉する第２のスロツト
ル弁と、 前記第１独立吸気通路に付設され、前記第１の
スロツトル弁の上流及び下流に開口する第１バイ
パス吸気通路と、 前記第２独立吸気通路に付設され、前記第２の
スロツトル弁の上流及び下流に開口すると共に、
前記第１バイパス吸気通路と隔壁を介して隣接す
る第２バイパス吸気通路と、 前記隔壁に形成され、前記第１バイパス吸気通
路と前記第２バイパス吸気通路に連通する弁配設
孔と、 該弁配設孔に設けられ、前記第１バイパス吸気
通路及び前記第２バイパス通路とを開閉する第３
スロツトル弁とを備え、 該スロツトル弁は、前記第１、第２のバイパス
通路を開成したときに、前記隔壁の一部を構成す
る、 ことを特徴とするエンジンの吸気装置。[Claims for Utility Model Registration] Cylinders whose ignition order is not adjacent to each other are divided into two groups of cylinders, and a first independent intake passage communicates with one group of cylinders, and a first independent intake passage communicates with the cylinder group of the other group. a second independent intake passage communicating with each other; a first throttle valve disposed in the first independent intake passage; and a throttle valve disposed in the second independent intake passage and opened and closed in synchronization with the first throttle valve. a second throttle valve; a first bypass intake passage attached to the first independent intake passage and opening upstream and downstream of the first throttle valve; a first bypass intake passage attached to the second independent intake passage and opened to the upstream and downstream sides of the first throttle valve; opens upstream and downstream of the throttle valve, and
a second bypass intake passage adjacent to the first bypass intake passage via a partition wall; a valve installation hole formed in the partition wall and communicating with the first bypass intake passage and the second bypass intake passage; the valve. a third valve that is provided in the arrangement hole and opens and closes the first bypass intake passage and the second bypass passage;
An intake device for an engine, comprising: a throttle valve, the throttle valve forming a part of the partition wall when the first and second bypass passages are opened.