JPH01124053U

JPH01124053U -

Info

Publication number: JPH01124053U
Application number: JP1626588U
Authority: JP
Priority date: 1988-02-12
Filing date: 1988-02-12
Publication date: 1989-08-23

Description

[Brief explanation of the drawing]

第１図は第３図及び第４図のサージタンクの水
平断面図、第２図は第１図のセージタンクの正面
図、第３図は本考案によるバイパス空気供給装置
を取りつけた内燃機関の平面図、第４図は第３図
の内燃機関の正面図、第５図は流れの特徴を説明
するために簡略化した第１図と同様の水平断面図
、第６図は同じく第２図と同様の正面図、第７図
は第５図の右端面図、第８図は第３図の可変吸気
制御弁の作動領域を示す図、第９図は本考案のも
のと従来技術のものの気筒間の空燃比変動を示す
図である。１４……サージタンク、１６……マニホールド
枝管、２０……スロツトル弁、２４，２６……分
岐管部、２４ａ，２６ａ……分岐管用フランジ、
２８……ＩＳＣＶ、３０……バイパス空気供給通
路、３２……正面壁、３４……背面壁、４０……
可変―気制御弁、５６……バイパス空気出口パイ
プ。 Fig. 1 is a horizontal sectional view of the surge tank shown in Figs. 3 and 4, Fig. 2 is a front view of the sage tank shown in Fig. 1, and Fig. 3 is a diagram of an internal combustion engine equipped with a bypass air supply device according to the present invention. A plan view, FIG. 4 is a front view of the internal combustion engine shown in FIG. 3, FIG. 5 is a simplified horizontal sectional view similar to FIG. 1 to explain flow characteristics, and FIG. 6 is a similar view to FIG. 7 is a right end view of FIG. 5, FIG. 8 is a view showing the operating range of the variable intake control valve of FIG. 3, and FIG. 9 is a view of the valve of the present invention and that of the prior art. FIG. 3 is a diagram showing air-fuel ratio fluctuations between cylinders. 14... Surge tank, 16... Manifold branch pipe, 20... Throttle valve, 24, 26... Branch pipe section, 24a, 26a... Branch pipe flange,
28...ISCV, 30...Bypass air supply passage, 32...Front wall, 34...Rear wall, 40...
Variable air control valve, 56... Bypass air outlet pipe.

Claims

[Scope of utility model registration request]

It has a throttle valve disposed in the intake passage of an internal combustion engine and a surge tank disposed downstream of the throttle valve. a bypass in which side intake passages are connected to positions on both sides of the valve device on one side of the surge tank, bypassing the throttle valve and supplying bypass air to a position on one side of the surge tank away from the valve device; an air supply passage, the bypass air supply passage including a pipe protruding into the surge tank, and the pipe is arranged so as to apply bypass air to an inner wall surface of the surge tank opposite to one side of the surge tank. bypass air supply system for internal combustion engines.