JPS63198422U - - Google Patents

Description

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

第１図は本考案による実施例を示す吸気装置の
概略構成図、第２図は第１図の―断面図、第
３図は本考案の連通弁による体積効率の特性図、
第４図は本考案の開閉弁による体積効率の特性図
、第５図は本考案による体積効率の特性図、第６
図および第７図は従来の実施例を示す可変吸気装
置の概略構成図である。 １……エアクリーナ、３……スロツトルバルブ
、４……エンジン、５……第１サージタンク、６
_１〜６ｎ……第１吸気管、７……第２サージタン
ク、８_１〜８ｎ……第２吸気管、９_１〜９ｎ……
開口部、１０_１〜１０ｎ……連通弁、１１_１〜１
１ｎ……開閉弁。 FIG. 1 is a schematic configuration diagram of an intake device showing an embodiment of the present invention, FIG. 2 is a cross-sectional view of FIG. 1, and FIG. 3 is a characteristic diagram of volumetric efficiency due to the communication valve of the present invention.
Figure 4 is a characteristic diagram of the volumetric efficiency of the on-off valve of the present invention, Figure 5 is a characteristic diagram of the volumetric efficiency of the present invention, and Figure 6 is a characteristic diagram of the volumetric efficiency of the on-off valve of the present invention.
FIG. 7 and FIG. 7 are schematic configuration diagrams of a variable intake system showing a conventional example. 1... Air cleaner, 3... Throttle valve, 4... Engine, 5... First surge tank, 6
₁ to 6n...first intake pipe, 7...second surge tank, _{81 to} 8n...second intake pipe, _{91 to} 9n...
Opening portion, 10 ₁ to 10n...Communication valve, 11 ₁ to 1
1n...Opening/closing valve.

Claims (1)

【実用新案登録請求の範囲】 エアクリーナとエンジンとを連通する吸気管の
途中に第１サージタンクと、上記第１サージタン
クの外周に設けた第２サージタンクとからなる２
重構造のサージタンクを配設し、 上記第１サージタンクに、上記第２サージタン
クに連通する、複数の小径な開口部と、上記開口
部を開閉する連通弁とを設け、 上記第１サージタンクおよび第２サージタンク
より各気筒内燃焼室に連通する第１および第２吸
気管をそれぞれ平行して設けるとともに、上記第
２吸気管に開閉弁を設け、 上記第１サージタンクの連通弁および上記第２
吸気管内の開閉弁をエンジン回転数の増大に対応
して順次開くように構成したことを特徴とする内
燃機関の吸気装置。[Scope of Claim for Utility Model Registration] Two surge tanks consisting of a first surge tank in the middle of the intake pipe that communicates the air cleaner and the engine, and a second surge tank provided on the outer periphery of the first surge tank.
A heavy structure surge tank is provided, and the first surge tank is provided with a plurality of small diameter openings that communicate with the second surge tank, and a communication valve that opens and closes the openings, and the first surge tank First and second intake pipes are provided in parallel to communicate with each cylinder combustion chamber from the tank and the second surge tank, and an on-off valve is provided in the second intake pipe, and a communication valve of the first surge tank and 2nd above
An intake system for an internal combustion engine, characterized in that an on-off valve in an intake pipe is configured to open sequentially in response to an increase in engine speed.