PULSATION DAMPER

• Main Authors: YANAGIYA HIDEYUKI, KADOWAKI MORIMICHI, YOSHIDA MAKOTO
• Format: Patent
• Language: English; Japanese
• Published: 05.08.2021
• Subjects: BLASTING; COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; WEAPONS

To provide a pulsation damper which enables effective reduction of pulsation occurring in a high pressure fuel supply system while improving durability.SOLUTION: A pulsation damper 10 is disposed in a damper case 20 into which a fluid having a changing pressure flows and has: a first diaphragm 12 in which a gas is enclosed; and a second diaphragm 13 disposed in the first diaphragm 12. When a pressure of the fluid in the damper case 20 is smaller than a threshold value, the first diaphragm 12 does not contact with the second diaphragm 13. When the pressure of the fluid in the damper case 20 is larger than or equivalent to the threshold value, the first diaphragm 12 contacts with the second diaphragm 13.SELECTED DRAWING: Figure 3 【課題】耐久性を高めながらも、高圧燃料供給システムに生じる脈動を効果的に低減することができるパルセーションダンパーを提供する。【解決手段】パルセーションダンパー１０は、圧力が変化する流体が流入するダンパーケース２０内に配置され、内部に気体を封入した第１ダイアフラム１２と、前記第１ダイアフラム１２の内部に配置された第２ダイアフラム１３と、を有し、前記ダンパーケース２０内の流体の圧力が閾値未満の場合、前記第１ダイアフラム１２は前記第２ダイアフラム１３に当接せず、前記ダンパーケース２０内の流体の圧力が前記閾値以上の場合、前記第１ダイアフラム１２は前記第２ダイアフラム１３に当接する。【選択図】図３