JPS63134147U

JPS63134147U -

Info

Publication number: JPS63134147U
Application number: JP2549487U
Authority: JP
Priority date: 1987-02-25
Filing date: 1987-02-25
Publication date: 1988-09-02

Description

[Brief explanation of the drawing]

第１図はこの考案の構成を示す図。第２図はこ
の考案の実施例のシステム全体概略図。第３図は
一つの気筒の横断面を示す図（第２図の―線
に沿う図）。第４図は機関の１サイクルでの一つ
の気筒の吸気弁、排気弁の作動タイミング角度線
図。第５図は軽負荷時におけるこの考案の実施例
の吸気弁及び排気弁付き２サイクル内燃機関の１
サイクルにおける燃焼作動を説明する図。第６図
は高負荷時におけるこの考案の実施例の吸気弁及
び排気弁付き２サイクル内燃機関の１サイクルに
おける燃焼作動を説明する図。第７図、第８図及
び第９図は制御回路の作動を説明するフローチヤ
ート図。第１０図は、イグニツシヨンスイツチＯ
Ｎ、ＯＦＦ時の休止インジエクタの間欠駆動を説
明するタイミング図。第１１図は、通常走行時の
休止インジエクタの間欠駆動を説明するタイミン
グ図。１０……機関本体、１７……燃焼室、２４ａ，
２４ｂ……吸気弁、２６ａ，２６ｂ……排気弁、
３４ａ，３４ｂ……吸気通路、３６……吸気制御
弁、３８ａ，３８ｂ……燃料インジエクタ、４２
……インタクーラ、４４……機械式過給機、４８
……エアフローメータ、５４……排気マニホルド
、６０……制御回路、６２，６４……クランク角
度センサ、６６……スタータ。 FIG. 1 is a diagram showing the configuration of this invention. FIG. 2 is a schematic diagram of the entire system according to the embodiment of this invention. FIG. 3 is a diagram showing a cross section of one cylinder (a diagram taken along the line - in FIG. 2). FIG. 4 is an angle diagram of the operation timing of the intake valve and exhaust valve of one cylinder in one cycle of the engine. Figure 5 shows one example of a two-stroke internal combustion engine with an intake valve and an exhaust valve according to an embodiment of this invention under light load.
The figure explaining the combustion operation in a cycle. FIG. 6 is a diagram illustrating combustion operation in one cycle of a two-stroke internal combustion engine with an intake valve and an exhaust valve according to an embodiment of the present invention under high load. FIGS. 7, 8, and 9 are flowcharts illustrating the operation of the control circuit. Figure 10 shows the ignition switch O
FIG. 4 is a timing diagram illustrating intermittent driving of a rest injector when N and OFF are in effect. FIG. 11 is a timing diagram illustrating intermittent driving of the inactive injector during normal driving. 10...Engine body, 17...Combustion chamber, 24a,
24b...Intake valve, 26a, 26b...Exhaust valve,
34a, 34b...Intake passage, 36...Intake control valve, 38a, 38b...Fuel injector, 42
...Intercooler, 44...Mechanical supercharger, 48
... Air flow meter, 54 ... Exhaust manifold, 60 ... Control circuit, 62, 64 ... Crank angle sensor, 66 ... Starter.

Claims

[Scope of Utility Model Registration Claim] In a two-stroke internal combustion engine in which one cylinder is provided with a plurality of intake ports, each of which is provided with a fuel injector, and some of the injectors are activated or deactivated depending on operating conditions, an injector stop range determining means for determining an operating range in which some of the injectors should be stopped; an intermittent drive signal generating means for generating a signal for intermittently driving the injectors; A fuel injection control device for a two-stroke internal combustion engine, comprising: gate means for transmitting the intermittent drive signal to an injector of the engine.