JPH0323640U

JPH0323640U -

Info

Publication number: JPH0323640U
Application number: JP8422189U
Authority: JP
Priority date: 1989-07-18
Filing date: 1989-07-18
Publication date: 1991-03-12

Description

[Brief explanation of drawings]

第１図は、本考案装置の全体構成図であり、第
２図は、動弁装置の全体構成図であり、第３図及
び第４図は、それぞれ動弁装置の要部断面図であ
り、第５図は、気化器の縦断面図である。第６図
及び第７図は、本考案装置の作動要領を示すフロ
ーチヤートである。第８図は、弁作動状態可変式
エンジンのトルク特性線図であり、第９図は、定
真空式気化器の空燃比特性線図である。１……エンジン本体、２……吸気マニホールド
、３……気化器、４……エアクリーナ、５……ソ
レノイド装置、６……動弁装置、７……オイルポ
ンプ、８……電磁弁、９……切換制御弁、１０…
…電子制御回路、１１……ロツカシヤフト、１２
〜１４…ロツカアーム、１５……カム軸受、１６
……カム軸、１７ａ，１７ｂ……低速用カム、１
８……高速用カム、１９ａ，１９ｂ……吸気弁、
２０……シリンダヘツド、２１……リフタ、２２
……連結切換装置、２３〜２５……ガイド孔、２
６〜２８……切換ピン、２９……油路、３０……
給油孔、３１……給油路、３２……リターンスプ
リグ、３３，３４……給油管、３５……噴出孔、
３６……潤滑油路、３７……噴出孔、３８……油
路、３９……リターンスプリング、４０……スプ
ール弁、４１……オイルフイルタ、４２……流入
ポート、４３……流出ポート、４４……オリフイ
ス孔、４５……ドレンポート、４６……オイルパ
ン、４７……環状溝、４８……パイロツト油路、
４９……油圧スイツチ、５１……吸気道、５２…
…ガイド孔、５３……摺動絞り弁、５４……スロ
ツトル弁、５５……ダイヤフラム装置、５６……
下部ケーシング、５７……上部ケーシング、５８
……ダイヤフラム、５９……負圧室、６０……大
気圧室、６１……小孔、６２……ベンチユリ部、
６３……ストツパプランジヤ、６４……リテーナ
、６５……ニードル、６６……ジエツト、６７…
…ポート、６８……圧縮コイルばね。 FIG. 1 is an overall configuration diagram of the device of the present invention, FIG. 2 is an overall configuration diagram of the valve train, and FIGS. 3 and 4 are sectional views of main parts of the valve train, respectively. , FIG. 5 is a longitudinal sectional view of the vaporizer. FIGS. 6 and 7 are flowcharts showing the operating procedure of the device of the present invention. FIG. 8 is a torque characteristic diagram of a variable valve operation state engine, and FIG. 9 is an air-fuel ratio characteristic diagram of a constant vacuum carburetor. DESCRIPTION OF SYMBOLS 1... Engine body, 2... Intake manifold, 3... Carburetor, 4... Air cleaner, 5... Solenoid device, 6... Valve gear, 7... Oil pump, 8... Solenoid valve, 9... ...Switching control valve, 10...
...Electronic control circuit, 11...Rotsuka shaft, 12
~14...Rotsuka arm, 15...Cam bearing, 16
...Camshaft, 17a, 17b...Low speed cam, 1
8...High speed cam, 19a, 19b...Intake valve,
20...Cylinder head, 21...Lifter, 22
...Connection switching device, 23-25...Guide hole, 2
6-28...Switching pin, 29...Oil passage, 30...
Oil supply hole, 31...Oil supply path, 32...Return sprig, 33, 34...Oil supply pipe, 35...Ejection hole,
36...Lubrication oil path, 37...Blowout hole, 38...Oil path, 39...Return spring, 40...Spool valve, 41...Oil filter, 42...Inflow port, 43...Outflow port, 44 ... Orifice hole, 45 ... Drain port, 46 ... Oil pan, 47 ... Annular groove, 48 ... Pilot oil path,
49...Hydraulic switch, 51...Intake path, 52...
... Guide hole, 53 ... Sliding throttle valve, 54 ... Throttle valve, 55 ... Diaphragm device, 56 ...
Lower casing, 57... Upper casing, 58
... diaphragm, 59 ... negative pressure chamber, 60 ... atmospheric pressure chamber, 61 ... small hole, 62 ... bench lily part,
63... Stopper plunger, 64... Retainer, 65... Needle, 66... Jet, 67...
...Port, 68...Compression coil spring.

Claims

[Scope of Claim for Utility Model Registration] (1) An engine with variable valve operating state that is equipped with a valve operating state switching means for varying the operating state of the valve train according to the operating state including at least the engine rotation speed. A constant vacuum carburetor is equipped with a negative pressure responsive valve for forming a variable bench lily on the intake upstream side of a throttle valve in order to supply a valve with an opening degree for varying the lift amount of the negative pressure responsive valve. A constant vacuum carburetor for a variable valve operating state engine, comprising a regulating means, the opening regulating means being controlled in response to the operation of the valve operating state switching means. (2) In the vicinity of a switching point at which the valve operation state switching means is set to a state corresponding to relatively high-speed operation, the opening degree regulating means is set to a relatively low opening degree. A constant vacuum carburetor for an engine with a variable valve operation state according to claim 1.