PRESSURE PULSATION REDUCTION MECHANISM FOR FUEL AND HIGH PRESSURE FUEL SUPPLY PUMP OF INTERNAL COMBUSTION ENGINE INCLUDING THE SAME

• Main Authors: SUGANAMI MASAYUKI, HASHIDA MINORU, TAKAHASHI SUNAO, USUI SATOSHI, TAMURA SHINGO, MIYAZAKI KATSUMI
• Format: Patent
• Language: English; Japanese
• Published: 27.06.2019
• 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 reduce the number of components in work for assembling a metal diaphragm damper into a low pressure fuel passage, and prevent component deficiency or misassembly.SOLUTION: A pressure pulsation reduction mechanism includes a pair of metal dampers to the whole circumference of which two discoid metal diaphragms are jointed, and in which a sealed space is formed inside the connection section. In the sealed space of the damper, gas is sealed, and at a position inside the connection section, provided is a pair of pressing members configured to impart pressing force to each of both external surfaces of the metal dampers. The pair of pressing members is connected and unified in a state of holding the metal dampers therebetween.SELECTED DRAWING: Figure 7 【課題】金属ダイアフラムダンパを低圧燃料通路に組込む作業の際の部品点数を低減し、部品欠品や誤組立を防ぐことにある。【解決手段】圧力脈動低減機構は２枚の円盤状金属ダイアフラムを全周にわたって接合して、接合部の内側に密閉空間が形成された一対の金属ダンパを備え、ダンパの前記密閉空間にはガスが封入されており、接合部よりも内径側の位置で前記金属ダンパの両外表面にそれぞれ押付け力を付与する一対の押付け部材を有し、この一対の押付け部材が金属ダンパを挟持した状態で結合されてユニット化されている。【選択図】 図７