JPS63162955U - - Google Patents

Description

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

第１図は本考案の構成を説明するブロツク図、
第２図は本考案の一実施例の全体システム図、第
３図は同上実施例の制御フローチヤート、第４図
はトルク及び燃費率と空燃比との関係を示すグラ
フである。 １……機関本体、３……エアフローメータ、４
……デイストリビユータ、５……コントロールユ
ニツト、６……スロツトル弁、７……スロツトル
センサ、８……水温センサ、９……排気通路、１
０……空燃比センサ、１１……燃料噴射弁、１５
……空燃比切換スイツチ。 Figure 1 is a block diagram explaining the configuration of the present invention.
FIG. 2 is an overall system diagram of an embodiment of the present invention, FIG. 3 is a control flowchart of the same embodiment, and FIG. 4 is a graph showing the relationship between torque, fuel consumption rate, and air-fuel ratio. 1... Engine body, 3... Air flow meter, 4
... Distributor, 5 ... Control unit, 6 ... Throttle valve, 7 ... Throttle sensor, 8 ... Water temperature sensor, 9 ... Exhaust passage, 1
0... Air-fuel ratio sensor, 11... Fuel injection valve, 15
...Air-fuel ratio selector switch.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 機関運転状態に応じて燃料噴射量を設定する燃
料噴射量設定手段と、排気中の酸素濃度に基づい
て空燃比を検出する空燃比検出手段と、機関トル
ク重視用と燃費重視用のそれぞれの空燃比を目標
値として選択設定する目標空燃比設定手段と、検
出された実際の空燃比が選択された目標空燃比よ
りもリツチのとき目標空燃比にすべく燃料噴射量
を減量補正する燃料噴射量減量補正手段とを備え
たことを特徴とする内燃機関の空燃比制御装置。 A fuel injection amount setting means for setting the fuel injection amount according to the engine operating state, an air-fuel ratio detection means for detecting the air-fuel ratio based on the oxygen concentration in the exhaust gas, and an air-fuel ratio detection means for determining the air-fuel ratio based on the oxygen concentration in the exhaust gas. A target air-fuel ratio setting means for selectively setting a fuel ratio as a target value, and a fuel injection amount for reducing and correcting the fuel injection amount to reach the target air-fuel ratio when the detected actual air-fuel ratio is richer than the selected target air-fuel ratio. 1. An air-fuel ratio control device for an internal combustion engine, comprising a reduction correction means.