ON-OFF VALVE

• Main Authors: ISHIKAWA MASAMI, UCHIDA KENJI
• Format: Patent
• Language: English; Japanese
• Published: 13.05.2024
• Subjects: BLASTING; COMBUSTION ENGINES; CRANKCASE VENTILATING; ENGINE PLANTS IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; LUBRICATING INTERNAL COMBUSTION ENGINES; LUBRICATING OF MACHINES OR ENGINES IN GENERAL; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; WEAPONS

To suppress increase in concentration of hydrogen gas in a crankcase.SOLUTION: An internal combustion engine using hydrogen as fuel includes a supercharger. An on-off valve 200 includes an open hole 213 for opening an inside of a crankcase of the internal combustion engine to the atmosphere, a valve element 220 for opening and closing the open hole 213 by being displaced to the open hole 213, and a first spring 231 and a second spring 232 for energizing the valve element 220 so that the open hole 213 is in an open state. The valve element 220 includes a first valve 221 for closing the open hole 213 from the atmosphere side, and a second valve 222 for closing the open hole 213 from the crankcase side.SELECTED DRAWING: Figure 2 【課題】クランクケース内の水素ガスの濃度が高くなることを抑える。【解決手段】水素を燃料とする内燃機関は過給機を備えている。開閉弁２００は、内燃機関のクランクケース内を大気開放する開放孔２１３と、開放孔２１３に対して変位することにより開放孔２１３を開閉する弁体２２０と、開放孔２１３が開放状態となるように弁体２２０を付勢する第１スプリング２３１及び第２スプリング２３２とを有している。そして、弁体２２０は、開放孔２１３を大気側から閉塞する第１弁２２１と、開放孔２１３をクランクケース側から閉塞する第２弁２２２とを備えている。【選択図】図２