JPS6229408U

JPS6229408U -

Info

Publication number: JPS6229408U
Application number: JP2613386U
Authority: JP
Priority date: 1986-02-25
Filing date: 1986-02-25
Publication date: 1987-02-23

Description

[Brief explanation of the drawing]

第１図は本考案の実施例に適用するエンジン全
体を示す説明図、第２図は第１図によるエンジン
の燃焼室形状を示す説明図、第３図は本考案の実
施例を示す概略説明図、第４図は第３図における
第２ロツカアームの拡大説明図、第５図は第４図
の―断面説明図、第６図は第４図の―断
面説明図、第７図は実施例の弁作動停止機構の作
動特性図、第８図は吸気弁を変えた場合の回転速
度に対する発生トルクの特性図、第９図は排気ガ
ス還流装置の作動特性図、第１０図は点火時期制
御装置の作動特性図である。２：エンジン、１０：燃焼室、１２：第１吸気
ポート、１４：第２吸気ポート、１６：第１吸気
弁、１８：第２吸気弁、２６：気化器、２８：１
次通路、３０：２次通路、４２，４８：スロツト
ル弁、５２：第１吸気弁駆動装置、６８：第２吸
気弁駆動装置、７２：第２ロツカアーム、７６：
弁作動停止機構、７８：プランジヤ、８４：油圧
室、９０：ボール弁、１０４：切換弁、１２２：
油通路、１３０：作動装置、１３２：バルブ、１
３６：蓄圧装置、１３７：逆止弁、１４０：蓄圧
室、１４８：ソレノイド、１５４：制御装置、１
５６：通電装置、１６４：第１出力回路、１６６
：点火時期制御装置、１７２：第２出力回路、１
７６：中負荷検出装置、１９２：排気ガス還流装
置、２３８：第３出力回路、２６２：第４出力回
路、２６４：高負荷検出装置。 Fig. 1 is an explanatory diagram showing the entire engine applied to the embodiment of the present invention, Fig. 2 is an explanatory diagram showing the combustion chamber shape of the engine according to Fig. 1, and Fig. 3 is a schematic diagram showing the embodiment of the present invention. Figure 4 is an enlarged explanatory view of the second rocker arm in Figure 3, Figure 5 is an explanatory cross-sectional view of Figure 4, Figure 6 is an explanatory cross-sectional view of Figure 4, and Figure 7 is an embodiment. Fig. 8 is a characteristic diagram of generated torque versus rotational speed when changing the intake valve, Fig. 9 is an operating characteristic diagram of the exhaust gas recirculation system, and Fig. 10 is an ignition timing control diagram. FIG. 3 is a diagram showing the operating characteristics of the device. 2: engine, 10: combustion chamber, 12: first intake port, 14: second intake port, 16: first intake valve, 18: second intake valve, 26: carburetor, 28:1
Next passage, 30: Secondary passage, 42, 48: Throttle valve, 52: First intake valve drive device, 68: Second intake valve drive device, 72: Second rocker arm, 76:
Valve operation stop mechanism, 78: plunger, 84: hydraulic chamber, 90: ball valve, 104: switching valve, 122:
Oil passage, 130: Actuation device, 132: Valve, 1
36: Pressure accumulator, 137: Check valve, 140: Pressure accumulator, 148: Solenoid, 154: Control device, 1
56: Energizing device, 164: First output circuit, 166
: Ignition timing control device, 172: Second output circuit, 1
76: Medium load detection device, 192: Exhaust gas recirculation device, 238: Third output circuit, 262: Fourth output circuit, 264: High load detection device.

Claims

[Scope of utility model registration request]

A cylinder formed in the valve drive device of the engine,
The valve has a plunger that is slidably fitted to the cylinder, and the valve operation is controlled to switch between the valve opening/closing operating state and the valve closing state in response to switching between supplying or stopping the supply of hydraulic pressure to the cylinder. A hydraulic passage that supplies hydraulic pressure generated by an engine lubricating oil supply pump to the stop mechanism and the valve operation stop mechanism, a hydraulic control valve that is provided in the hydraulic passage and opens and closes the hydraulic passage, the hydraulic control valve and the above. A pressure accumulator is provided in the hydraulic passageway between the supply pump and stores pressure oil from the supply pump, and when the hydraulic control valve switches the hydraulic passageway from a closed state to an open state, the pressure accumulator is An engine having a valve operation stop mechanism, characterized in that pressure oil is configured to be supplied to the valve operation stop mechanism.