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Being the seal feature which seals the pulsation fuel pressure oil where the delivery pressure fluctuation intermittently
Being the seal feature which seals the pulsation fuel pressure oil where the delivery pressure fluctuation intermittently
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机译:作为密封特性,可在脉动燃油压力间歇性波动的情况下密封脉动燃油压力油
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摘要
PROBLEM TO BE SOLVED: To improve reliability of an engine system by improving a seal mechanism of an O-ring which may cause oil leakage of a fuel pump, and thereby eliminating oil leakage. ;SOLUTION: A backup ring groove 3 is formed on the pressurizing side of an O-ring 1, independently on an O-ring groove 2. A backup ring 4 is fitted into the backup ring groove 3. A drain hole 5 is formed on a part of the backup ring groove 3. The backup ring groove 3 may be purally formed. In such a case, the backup ring 4 is fitted to each backup ring groove 3.;COPYRIGHT: (C)1998,JPO
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