| 摘要 |
PROBLEM TO BE SOLVED: To obtain a control valve structure of an accumulator fuel injection device, reducing adverse influence of a bounce with an inexpensive means without requiring an extra device. SOLUTION: A cross-sectional shape of a tip of a control valve 8 along an axis of the control valve is configured such that it is formed with a bend comprising at least one inflection point Z1, a first surface portion 3a is formed on a root side from the bend, a second surface portion 3c is formed on a tip side, the first surface portion 3a contacts with a seat 2a of a nozzle body and defines a full close position, change of an opening area formed between the first surface portion 3a and the seat 2a during a lift from the full close until the inflection point Z1 reaches the seat 2a is smaller than a fixed rate, and during a lift wherein the inflection point Z1 is larger than the seat 2a, change of the opening area formed between the second surface portion 3c and the seat 2a to the lift is larger than the fixed rate. COPYRIGHT: (C)2010,JPO&INPIT
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