JPS63134173U

JPS63134173U -

Info

Publication number: JPS63134173U
Application number: JP2640387U
Authority: JP
Priority date: 1987-02-26
Filing date: 1987-02-26
Publication date: 1988-09-02

Description

[Brief explanation of the drawing]

第１図はこの考案の実施例のシステム全体概略
図。第２図は一つの気筒の横断面を示す図（第１
図の―線に沿う図）。第３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４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５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６
図は過給機回転数と体積効率との関係を示すグラ
フ。第７図及び第８図は制御回路の作動を説明す
るフローチヤート図。１０……機関本体、１７……燃焼室、２４ａ，
２４ｂ……吸気弁、２６ａ，２６ｂ……排気弁、
３２……吸気管、３２―１，３２―２……分岐管
部、３２―３……集合管部、３６……吸気制御弁
、３８ａ，３８ｂ……燃料インジエクタ、４１…
…吸気開閉弁、４３……低温始動インジエクタ、
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
、６７……低温始動インジエクタ駆動回路、６８
……スタータ。 FIG. 1 is a schematic diagram of the entire system according to an embodiment of this invention. Figure 2 is a diagram showing the cross section of one cylinder (first
(along the - line in the figure). FIG. 3 is an angle diagram of the operation timing of the intake valve and exhaust valve of one cylinder during one cycle of the engine. FIG. 4 is a diagram illustrating the combustion operation in one cycle of the two-stroke internal combustion engine with an intake valve and an exhaust valve according to the embodiment of the present invention under light load. FIG. 5 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. 6th
The figure is a graph showing the relationship between turbocharger rotation speed and volumetric efficiency. FIGS. 7 and 8 are flowcharts illustrating the operation of the control circuit. 10...Engine body, 17...Combustion chamber, 24a,
24b...Intake valve, 26a, 26b...Exhaust valve,
32...Intake pipe, 32-1, 32-2...Branch pipe section, 32-3...Collecting pipe section, 36...Intake control valve, 38a, 38b...Fuel injector, 41...
...Intake on/off valve, 43...Cold start injector,
44... Mechanical supercharger, 48... Air flow meter, 54... Exhaust manifold, 60... Control circuit, 67... Low temperature start injector drive circuit, 68
...Starter.

Claims

[Claims for Utility Model Registration] 1. In a two-stroke multi-cylinder internal combustion engine in which air is scavenged by a supercharger, the intake pipe has a branch pipe section that can supply air separately for at least two groups, and a branch pipe section that connects the branch pipe sections with each other. The engine is equipped with an intake opening/closing valve for opening and closing air to some branch pipes, and the intake opening/closing valve is closed when the engine is started to perform partial cylinder operation. A starting control device for a two-stroke multi-cylinder internal combustion engine. 2 Scope of claim for utility model registration 1. The starting control device for a two-stroke multi-cylinder internal combustion engine, wherein a starting injector is provided for a branch pipe section in which an intake opening/closing valve is not installed.