HIGH-PRESSURE FUEL PUMP AND SEAL SYSTEM FOR HIGH-PRESSURE FUEL PUMP
摘要
<p>A high-pressure fuel pump with seal system that is usable under the conditions of "high speed", "high pressure" and "resistance to fuel oil". There is provided a high-pressure fuel pump comprising an axle capable of reciprocating motion in the pump and seal system (21) for separating/sealing of fuel and lubricating oil as sealing objects in a circular space within a housing having the axle passing therethrough, wherein the seal system (21) consists of a combination of fuel-side seal (31) for sealing of fuel and lubricating-oil-side seal (41) for sealing of lubricating oil. The fuel-side seal (31) is composed of resin-made seal ring (32) and rubbery-elastomer-made O ring (33) for backup of the seal ring (32). The lubricating-oil-side seal (41) consists of a single body of single-lip-type oil seal (42) wherein rubbery-elastomer-made seal lip (44) fitted to metal ring (43) is arranged so as to face the lubricating oil side. The spacing between the fuel-side seal (31) and the lubricating-oil-side seal (41) is set so as to be larger than the reciprocating motion distance of the axle.</p>
申请公布号
WO2007080739(A1)
申请公布日期
2007.07.19
申请号
WO2006JP324898
申请日期
2006.12.14
申请人
NOK CORPORATION;DENSO CORPORATION;NAKAYAMA, JUNICHI;EGUCHI, NOBUYUKI;INAMURA, TAMIO;HAMAMOTO, KOKICHI;INOUE, HIROSHI