JPS6287128U

JPS6287128U -

Info

Publication number: JPS6287128U
Application number: JP17786485U
Authority: JP
Priority date: 1985-11-19
Filing date: 1985-11-19
Publication date: 1987-06-03
Also published as: JPH0322513Y2

Description

[Brief explanation of drawings]

第１図は本考案に係る多気筒エンジンの吸気装
置の一例を示す平面図、第２図は第１図に示され
る例をそれぞれ適用されたエンジンの主要部とと
もに示す正面図、第３図は第１図に示される例の
構成部材の一部を示す側面図、第４図Ａ，Ｂ及び
Ｃは吸気の動的効果を利用した吸気装置の説明に
供される概念図、第５図は第４図Ａ，Ｂ及びＣに
示される吸気装置が夫々適用されたエンジンの出
力トルク特性をあらわす特性図である。図中、１０はサージタンク、１０Ａはサージタ
ンクハウジング本体、１１及び１２は吸気拡大室
、１４は隔壁、１６及び１７は分岐吸気通路群、
２５は連通管、３０は開閉弁、５０はサージタン
ク１０のハウジング端部、６３は弁開閉機構であ
る。 FIG. 1 is a plan view showing an example of an intake system for a multi-cylinder engine according to the present invention, FIG. 2 is a front view showing the example shown in FIG. 1 together with the main parts of the engine to which it is applied, and FIG. FIG. 1 is a side view showing some of the constituent members of the example shown in FIG. FIG. 4 is a characteristic diagram showing the output torque characteristics of an engine to which the intake devices shown in FIGS. 4A, B, and C are respectively applied. In the figure, 10 is a surge tank, 10A is a surge tank housing body, 11 and 12 are intake expansion chambers, 14 is a partition, 16 and 17 are branch intake passage groups,
25 is a communication pipe, 30 is an opening/closing valve, 50 is a housing end of the surge tank 10, and 63 is a valve opening/closing mechanism.

Claims

[Scope of utility model registration request]

A first branch intake passage group, one end of which is connected to each cylinder belonging to one of two cylinder groups each consisting of a plurality of cylinders whose intake strokes are not consecutive in order; a second branch intake passage group whose one end is connected to each cylinder to which it belongs; a first intake expansion chamber having a plurality of openings to which the other end of the first branch intake passage group is connected; and the second branch intake passage group. a surge tank in which second intake expansion chambers having a plurality of openings to which the other ends of the branched intake passage group are connected are arranged in parallel with a partition between them; and the first intake expansion chamber and the second intake expansion chamber. a communication pipe that communicates with the intake expansion chamber; and an on-off valve that is provided inside the communication pipe and selectively blocks communication between the first intake expansion chamber and the second intake expansion chamber. , the surge tank has a housing end portion in which the communication pipe is integrally coupled to a part of the outer wall and the on-off valve is incorporated in the communication pipe, a part of the outer wall and a part of the partition wall; 1. An intake device for a multi-cylinder engine, comprising: a housing body having a notch formed therein to form a mounting portion for the end portion of the housing.