JPS61113969U - - Google Patents

Description

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

図面は本考案の実施例を示し、第１図は機関の
平面図、第２図は第１図の―視断面図、第３
図は第１図の―視断面図、第４図は第１図の
―視拡大断面図である。 １……内燃機関、３……二連式気化器、４……
一次側吸気ポート、５……二次側吸気ポート、６
，７……吸気弁、９……一次側気化器、１０……
二次側気化器、１３……一次側集合部、１４……
二次側集合部、１５，１６……一次側吸気通路、
１５ａ，１６ａ……一次側吸気通路のトーナメン
ト状分岐部、１７，１８……二次側吸気通路、１
９，２０，２１，２２……一次側吸気通路の小枝
吸気通路、２７……吸気予熱用冷却水チヤンバー
、２８……冷却水流入口、２９……冷却水流出口
。 The drawings show an embodiment of the present invention, and FIG. 1 is a plan view of the engine, FIG. 2 is a cross-sectional view of FIG. 1, and FIG.
The figure is a cross-sectional view of FIG. 1, and FIG. 4 is an enlarged cross-sectional view of FIG. 1. 1... Internal combustion engine, 3... Dual carburetor, 4...
Primary side intake port, 5...Secondary side intake port, 6
, 7... Intake valve, 9... Primary side carburetor, 10...
Secondary side carburetor, 13... Primary side gathering part, 14...
Secondary side gathering part, 15, 16...primary side intake passage,
15a, 16a...Tournament-shaped branch part of the primary side intake passage, 17, 18...Secondary side intake passage, 1
9, 20, 21, 22... Twig intake passage of the primary side intake passage, 27... Cooling water chamber for intake air preheating, 28... Cooling water inlet, 29... Cooling water outlet.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 二連式気化器を使用した多気筒内燃機関におけ
る各気筒に、一次側吸気ポートと二次側吸気ポー
トとを各々形成し、該一次側吸気ポートと二次側
吸気ポートとの両方に各々吸気弁を設ける一方、
前記一次側吸気ポートを一次側吸気通路を介して
前記二連式気化器における一次側気化器に、二次
側吸気ポートを二次側吸気通路を介して前記二連
式気化器における二次側気化器に各々連通して成
る内燃機関において、前記一次側吸気通路を、各
気筒の吸気ポートに向かつてトーナメント状に分
岐する吸気通路に形成して、この一次側吸気通路
を前記二次側吸気通路の下面側に配設し、且つ、
一次側吸気通路の下面には、吸気予熱用のチヤン
バーを、一次側気化器に対する集合部から前記ト
ーナメント状分岐部にわたつて延びるように一体
的に形成したことを特徴とする内燃機関の吸気装
置。 A primary side intake port and a secondary side intake port are formed in each cylinder of a multi-cylinder internal combustion engine using a dual carburetor, and each cylinder has an intake port in both the primary side intake port and the secondary side intake port. While providing a valve,
The primary side intake port is connected to the primary side carburetor of the dual type carburetor via the primary side intake passage, and the secondary side intake port is connected to the secondary side of the dual type carburetor via the secondary side intake passage. In an internal combustion engine, each of which is connected to a carburetor, the primary side intake passage is formed into an intake passage branching in a tournament shape toward the intake port of each cylinder, and the primary side intake passage is connected to the secondary side intake passage. Disposed on the bottom side of the passage, and
An intake system for an internal combustion engine, characterized in that a chamber for preheating the intake air is integrally formed on the lower surface of the primary side intake passage so as to extend from the gathering part for the primary side carburetor to the tournament-shaped branch part. .