| 摘要 |
PROBLEM TO BE SOLVED: To prevent high pressure fuel from leaking to the low pressure side in a three-way valve, when switching the three-way valve. SOLUTION: A first valve element 31 and a second valve element 32 are arranged in a pressure switching chamber 30 of the three-way valve 8. When switching a communication destination of a fuel flowing passage 15 to a low pressure fuel return passage 26a from a high pressure fuel supply passage 5a, the communication destination is switched to a state of closing the first valve element 32 and opening the second valve element 34, after passing through a state of closing both the first valve element 32 and the second valve element 34, from a state of opening the first valve element 32 and closing the second valve element 34. The valve opening timing of a needle valve 9 is controlled by fuel pressure of a pressure control port 55 closed by a sliding seal surface 53 formed on the outer periphery of the second valve element 34. COPYRIGHT: (C)2006,JPO&NCIPI
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