JPS6297226U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の第１実施例に係る機械式過給
機付き２サイクルエンジンの系統図、第２図は第
１図の２サイクルエンジンのバルブタイミング図
、第３図は第１図の２サイクルエンジンの制御用
コンピユータのブロツク図、第４図は本考案の第
２実施例に係る機械式過給機付き２サイクルエン
ジンの制御ブロツク図、第５図は本考案の第２実
施例に係る機械式過給機付き２サイクルエンジン
の制御マツプ図、である。 １……２サイクルエンジン、２……吸気弁、３
……排気弁、４……吸気通路、５……機械式過給
機、８……バイパス通路、９……バイパスバルブ
、１３……コンピユータ。 Fig. 1 is a system diagram of a two-stroke engine with a mechanical supercharger according to the first embodiment of the present invention, Fig. 2 is a valve timing diagram of the two-stroke engine of Fig. 1, and Fig. 3 is a diagram of the two-stroke engine of Fig. 1. A block diagram of a computer for controlling a two-stroke engine; FIG. 4 is a control block diagram of a two-stroke engine with a mechanical supercharger according to a second embodiment of the present invention; FIG. FIG. 2 is a control map diagram of the two-stroke engine with a mechanical supercharger. 1...2-cycle engine, 2...Intake valve, 3
...Exhaust valve, 4...Intake passage, 5...Mechanical supercharger, 8...Bypass passage, 9...Bypass valve, 13...Computer.

Claims (1)

【実用新案登録請求の範囲】 (1) 吸気弁と排気弁を有し、吸気通路に機械式
過給機を設けるとともに該機械式過給機をバイパ
スするバイパス通路を設け、該バイパス通路にコ
ンピユータによつて開閉を制御されるバイパスバ
ルブを設けて過給量を制御するようにした２サイ
クルエンジンにおいて、前記吸、排気弁の開閉タ
イミングをそれぞれ下死点に対し非対称とし、か
つ吸、排気弁の開閉タイミングを、排気弁開後吸
気弁が開き排気弁閉後吸気弁が閉じるように設定
したことを特徴とする機械式過給機付き２サイク
ルエンジン。 (2) 前記バイパスバルブの開度をエンジンの負
荷に応じて連続的に制御させた実用新案登録請求
の範囲第１項記載の機械式過給機付き２サイクル
エンジン。[Claims for Utility Model Registration] (1) A device having an intake valve and an exhaust valve, a mechanical supercharger provided in the intake passage, a bypass passage bypassing the mechanical supercharger, and a computer installed in the bypass passage. In a two-stroke engine in which the amount of supercharging is controlled by providing a bypass valve whose opening and closing is controlled by A two-stroke engine with a mechanical supercharger, characterized in that the opening/closing timing of the engine is set such that the intake valve opens after the exhaust valve opens, and the intake valve closes after the exhaust valve closes. (2) The two-stroke engine with a mechanical supercharger according to claim 1, wherein the opening degree of the bypass valve is continuously controlled according to the engine load.