| 摘要 |
PROBLEM TO BE SOLVED: To prevent reciprocating motion of a piston from being disturbed by fuel leaking from a contact part of a seal member installed at an outer circumference of the piston and an inner circumference surface of a regulator chamber. SOLUTION: In a fuel regulation device for an injector keeping pressure in a fuel passage 28 constant by reciprocating motion of the piston 38 built in the regulator chamber 31 and injecting appropriate quantity of fuel into an engine for a model, a valve stem 34 including a valve element 35 for opening regulation is built in the fuel passage 28 formed in a pressure control part main body 23, the piston 38 having a seal member 40 installed on an end part of the valve stem 34 positioning in the regulator chamber 31 is provided. The regulator chamber 31 is partitioned to a pressure regulation chamber 31a and a reference pressure chamber 31b. A discharge hole 43 communicating to the reference pressure chamber 31b and outside is provided on a pressure control part main body 23, fuel leaking to the reference pressure chamber 31b from the pressure regulation chamber 31a is discharged to the outside from the discharge hole 43 to prevent reciprocating motion of the piston 38 from being disturbed and keep pressure in the fuel passage 28 always constant. COPYRIGHT: (C)2005,JPO&NCIPI
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