REFLUX VALVE

• Main Author: NAKANISHI TOMOHIKO
• Format: Patent
• Language: English; Japanese
• Published: 24.09.2020
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; CRANKCASE VENTILATING; DEVICES FOR VENTING OR AERATING; ENGINE PLANTS IN GENERAL; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; LUBRICATING INTERNAL COMBUSTION ENGINES; LUBRICATING OF MACHINES OR ENGINES IN GENERAL; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

To provide a reflux valve capable of actively refluxing much blow-by gas in a state that negative pressure on an inlet side is small, without enlarging the reflux valve.SOLUTION: A first supported portion blocks a first opening with a valve body energized by an energizing member to be moved to one side in an axial direction. The first supported portion opens the first opening by moving the valve body to the other side in the axial direction against the energizing force of the energizing member by negative pressure on a downstream side with respect to an upstream side. The valve body has a first hole extending from an end portion on the other side in the axial direction to the one side in the axial direction. A valve body portion has a second hole extending from the outside in a diametrical direction and reaching the first hole. The valve body portion has a third hole at a different position in the axial direction with respect to the second hole.SELECTED DRAWING: Figure 2 【課題】還流弁を大型化することなく、入り口側の負圧が小さい状況で積極的に多くのブローバイガスを還流できる還流弁を提供する。【解決手段】第１被支持部は、付勢部材に付勢されて弁体が軸方向一方側に移動することで第１開口を塞ぎ、第１被支持部は、上流側に対する下流側の負圧により付勢部材の付勢力に抗って弁体が軸方向他方側に移動することで第１開口を開き、弁体は、軸方向他方の端部から軸方向一方側に延びる第１穴を有し、弁体胴部は、径方向外側から延びて第１穴に達する第２穴を有し、弁体胴部は、第２穴に対し軸方向で異なる位置に第３穴を有する。【選択図】図２