JPS62130118U

JPS62130118U -

Info

Publication number: JPS62130118U
Application number: JP1771686U
Authority: JP
Priority date: 1986-02-10
Filing date: 1986-02-10
Publication date: 1987-08-17

Description

[Brief explanation of the drawing]

第１図は、本考案の第１の実施例に係るエンジ
ンの２次空気供給装置の制御システム図、第２図
は同実施例装置における第２のエアコントロール
バルブの構造を示す拡大断面図、第３図は、同実
施例装置のエンジンコントロールユニツトの制御
機能を示す機能ブロツク図、第４図、第５図は、
同実施例装置のエンジン運転領域に対応した制御
特性を示すグラフ、第６図は、本考案の第２の実
施例に係るエンジンの２次空気供給装置の制御シ
ステム図、第７図は、同第２の実施例装置のエン
ジンコントロールユニツトの制御機能を示す機能
ブロツク図、第８図は、同第２の実施例装置のエ
ンジン運転領域に対応した制御特性を示すグラフ
である。１……エンジン本体、２……エアフロメータ、
５……フユーエルインジエクタ、６……スロツト
ル弁、８……スロツトル開度センサ、９……吸気
通路、１０……第１の触媒コンバータ、１１……
第２の触媒コンバータ、１２……第１の２次空気
供給ノズル、１３……第２の２次空気供給ノズル
、１４……排気通路、１５……エアポンプ、１６
……２次空気メイン供給路、２９……第１の電磁
弁、３９……第２の電磁弁、４１……領域判定回
路、５２……リードバルブ、６０……エンジン回
転数検出手段、６２……冷間状態検出回路、６３
……電磁クラツチ、７０……エンジン出力軸、１
５０……プーリ、Ｅ……エンジンコントロールユ
ニツト。 FIG. 1 is a control system diagram of a secondary air supply device for an engine according to a first embodiment of the present invention, and FIG. 2 is an enlarged sectional view showing the structure of a second air control valve in the device of the same embodiment. FIG. 3 is a functional block diagram showing the control functions of the engine control unit of the same embodiment, and FIGS. 4 and 5 are
6 is a graph showing the control characteristics corresponding to the engine operating range of the device according to the embodiment, and FIG. 6 is a control system diagram of the secondary air supply device for the engine according to the second embodiment of the present invention. FIG. 8, which is a functional block diagram showing the control function of the engine control unit of the second embodiment, is a graph showing the control characteristics corresponding to the engine operating range of the second embodiment. 1...Engine body, 2...Air flow meter,
5... Fuel injector, 6... Throttle valve, 8... Throttle opening sensor, 9... Intake passage, 10... First catalytic converter, 11...
Second catalytic converter, 12...First secondary air supply nozzle, 13...Second secondary air supply nozzle, 14...Exhaust passage, 15...Air pump, 16
... Secondary air main supply path, 29 ... First solenoid valve, 39 ... Second solenoid valve, 41 ... Area determination circuit, 52 ... Reed valve, 60 ... Engine rotation speed detection means, 62 ...cold state detection circuit, 63
...Electromagnetic clutch, 70...Engine output shaft, 1
50...Pulley, E...Engine control unit.

Claims

[Scope of utility model registration request]

In an engine that performs exhaust purification by supplying secondary air to an exhaust passage equipped with a catalytic converter using a secondary air supplying air pump driven by the engine, the secondary air supplying air pump is clutched. an operating state detecting means for detecting the operating state of the engine; and a clutch control means for controlling the clutch means intermittently in accordance with the operating state detected by the operating state detecting means. and the clutch control means engages and engages the clutch means in accordance with the operating state of the engine, thereby driving the secondary air supply air pump only in a predetermined operating range of the engine. secondary air supply system for the engine.