JPS6045856U - Air-fuel ratio control device for internal combustion engines - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図は混合気調整弁の断面図、第２図は運転条件によ
る混合気調整弁の作動状態のグラフを示す図である。第
３〜５図はこの考案による制御装置の実施例を示し、第
３図は第１実施例を示す概略断面図、第４図は第２実施
例を示す概略断面図、第５図は第３実施例を示す概略断
面図である。 図において、２は混合気調整弁、３０は負圧ポート、３
２は負圧通路、３４は二次空気通路、３８は電磁弁、４
０は制御部、４２はスタータスイッチ、４４は回転数ス
イッチ、４６は車速スイッチ、４８は閉鎖状態絞り弁、
５２は運転開度の絞り弁である。− −２０＋」FIG. 1 is a sectional view of the air-fuel mixture regulating valve, and FIG. 2 is a graph showing the operating state of the air-fuel mixture regulating valve depending on operating conditions. 3 to 5 show embodiments of the control device according to this invention, FIG. 3 is a schematic sectional view showing the first embodiment, FIG. 4 is a schematic sectional view showing the second embodiment, and FIG. 5 is a schematic sectional view showing the second embodiment. FIG. 3 is a schematic cross-sectional view showing a third embodiment. In the figure, 2 is a mixture adjustment valve, 30 is a negative pressure port, 3
2 is a negative pressure passage, 34 is a secondary air passage, 38 is a solenoid valve, 4
0 is a control unit, 42 is a starter switch, 44 is a rotation speed switch, 46 is a vehicle speed switch, 48 is a closed state throttle valve,
52 is a throttle valve for operating opening. − −20+”

Claims (1)

【実用新案登録請求の範囲】 １　気化器絞り弁急開時に吸気通路に二次空気を供給す
べく吸気通路負圧により動作する混合気調整弁を設け、
所定機関運転条件下では前記吸気通路への二次空気の供
給を停止すべく制御する制御装置を設けたことを特徴と
する内燃機関の空燃比制御装置。 ２　前記二次空気の制御装置が、前記混合気調整弁に吸
気通路負圧を導入する負圧通路にスタータ動作時および
所定機関回転数以下および所定車速以下のいずれの条件
下においても閉鎖する弁機構を介設した制御装置である
ことを特徴とする実用新案登録請求の範囲第１項に記載
の内燃機関の空燃比制御装置。 ３　前記二次空気の制御装置が、前記混合気調整弁に始
端し前記吸気通路に二次空気を供給する二次空気通路に
スタータ動作時および所定機関回転数以下および所定車
速以下のいずれの条件下においても閉鎖する弁機構を介
設した制御装置であることを特徴とする実用新案登録請
求の範囲第１項に記載の内燃機関の空燃比制御装置。 ４　前記二次空気の制御装置が、前記混合気調整弁に吸
気通路負圧を導入する負圧通路の吸気道路内開口端を閉
鎖状態絞り弁の下流側弁部の弁端下流側に設けた制御装
置であることを特徴とする実用新案登録請求の範囲第１
項に記載の内燃機関の空燃比制御装置。[Scope of Claim for Utility Model Registration] 1. A mixture regulating valve is provided which is operated by negative pressure in the intake passage in order to supply secondary air to the intake passage when the carburetor throttle valve is suddenly opened;
An air-fuel ratio control device for an internal combustion engine, comprising a control device that controls to stop supply of secondary air to the intake passage under predetermined engine operating conditions. 2. The secondary air control device includes a valve in the negative pressure passage that introduces negative pressure in the intake passage to the air-fuel mixture adjustment valve that closes when the starter is operating and under any conditions of below a predetermined engine speed and below a predetermined vehicle speed. An air-fuel ratio control device for an internal combustion engine according to claim 1, which is a control device with an intervening mechanism. 3. The secondary air control device controls the secondary air passage that starts at the air-fuel mixture adjustment valve and supplies secondary air to the intake passage under any of the following conditions: during starter operation, below a predetermined engine speed, and below a predetermined vehicle speed. The air-fuel ratio control device for an internal combustion engine according to claim 1, which is a control device that includes a valve mechanism that closes even when the engine is closed. 4. The secondary air control device has an opening end in the intake road of a negative pressure passage that introduces negative pressure in the intake passage into the air-fuel mixture adjustment valve downstream of a valve end of a downstream valve portion of the throttle valve in the closed state. Claim 1 for utility model registration characterized by a control device
The air-fuel ratio control device for an internal combustion engine according to item 1.