JPS5820353U

JPS5820353U - cylinder number control engine

Info

Publication number: JPS5820353U
Application number: JP11552881U
Authority: JP
Inventors: 菅沢　深; 晴彦飯塚
Original assignee: 日産自動車株式会社
Priority date: 1981-08-03
Filing date: 1981-08-03
Publication date: 1983-02-08

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 drawings]

第１図、第２図は従来装置の構成断面図、第３図は第１
図の気筒数制御回路構成図、第４図は本考案の実施例を
示す回路構成図、第５図は第４図のタイミングチャート
図、第６図は本考案の他の実施例を示す回路構成図、第
７図は第６図のタイミングチャート図である。１・・・絞弁、２・・・吸気通路、５・・・新気遮断弁
、６・・・制御回路、１０・・・排気通路、１３・・・
排気還流通路、１４・・・排気還流弁、１７・・・排気
処理装置、２０・・・空燃比センサ、２１・・・エアフ
ローメータ、２２・・・イグニッションコイル、２３・
・・燃料噴射制御回路、２４・・・気筒数制御回路、２
５・・・ドライブ回路、２６−・・パルス巾判断回路、
２°７・・・回転数判断回路、２８・・・ＡＮＤ回路、
２９・・・リレー、３２・・・インバータ、３３・・−
ＯＲ回路、３４・・・ＡＮＤ回路、３６・・・遅れ回路
、３７・・・インバータ、３８・・・積分回路、３゛９
・・・微分回路、４０・・・フリップフロップ、４１・
・・遅れ回路、４２・・・インバータ、４３・・・ＡＮ
Ｄ回路。１［３１“す）、 −第４図１め　　　　んFigures 1 and 2 are cross-sectional views of the conventional device, and Figure 3 is the 1st
4 is a circuit diagram showing an embodiment of the present invention, FIG. 5 is a timing chart diagram of FIG. 4, and FIG. 6 is a circuit diagram showing another embodiment of the present invention. The configuration diagram, FIG. 7, is a timing chart diagram of FIG. 6. DESCRIPTION OF SYMBOLS 1... Throttle valve, 2... Intake passage, 5... Fresh air cutoff valve, 6... Control circuit, 10... Exhaust passage, 13...
Exhaust recirculation passage, 14... Exhaust recirculation valve, 17... Exhaust treatment device, 20... Air-fuel ratio sensor, 21... Air flow meter, 22... Ignition coil, 23...
...Fuel injection control circuit, 24...Cylinder number control circuit, 2
5... Drive circuit, 26-... Pulse width judgment circuit,
2°7...Rotation speed judgment circuit, 28...AND circuit,
29...Relay, 32...Inverter, 33...-
OR circuit, 34...AND circuit, 36...delay circuit, 37...inverter, 38...integrator circuit, 3゛9
...Differential circuit, 40...Flip-flop, 41.
...Delay circuit, 42...Inverter, 43...AN
D circuit. 1 [31"su), -Figure 4 1 Noodles

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

エンジンの負荷に応じて燃料の供給が遮断され作動を休
止する休止側気筒と、常時燃料が供給され作動を継続す
る稼動側気筒とを備え、これら休止側気筒と稼動側気筒
とに対応して吸気通路を冷中から分岐し、同じく排気通
路を途中まで分岐し、休止側吸気通路に前記作動体止時
に閉じる新気遮断弁と、合流する排気通路に排気処理装
置とを設け、この排気処理装置を介した排気の一部を前
記作動体止時に休止側気筒に導く排気還流通路を設けた
多気筒エンジンにおいて、排気処理装置に流入前の排気
の濃薄を検知する手段を設け、この検出信号に基づき排
気が濃いときとその直後の所定時間には、全気筒とも作
動して運転する手段を設けたことを特徴とする気筒数制
御エンジン。It is equipped with a dormant cylinder whose fuel supply is cut off and stops operating depending on the engine load, and an active cylinder which is constantly supplied with fuel and continues to operate. The intake passage is branched from the cold side, the exhaust passage is also branched halfway, and the intake passage on the idle side is provided with a fresh air cutoff valve that closes when the operating body is stopped, and the merging exhaust passage is provided with an exhaust treatment device, and this exhaust treatment is performed. In a multi-cylinder engine provided with an exhaust gas recirculation passage for guiding part of the exhaust gas through the device to the cylinder on the idle side when the operating body is stopped, a means is provided for detecting the concentration of the exhaust gas before it flows into the exhaust treatment device, and this detection method is provided. An engine with a controlled number of cylinders, characterized in that it is provided with a means for operating all cylinders when exhaust gas is rich and at a predetermined time immediately thereafter based on a signal.