| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection valve capable of injecting fuel at optimal fuel injection rate in various engine operation zones. SOLUTION: A fuel injection valve 2 is provided with a first injection hole group 14 and a second injection hole group 15, a control chamber 20, and a first needle valve 12 and a second needle valve 13. The first needle valve opens and closes injection holes of the first injection hole group, and the second needle valve opens and closes injection holes of the second injection hole group. Lifts of the needle valves are controlled by pressure of fuel in the control chamber. The fuel injection valve is provided with a fuel flow in passage 30 communicating to a fuel supply source and the control chamber, and an opening control means which can control opening of an opening of the fuel flow in passage according to a relative position of the first needle valve and the second needle valve. COPYRIGHT: (C)2009,JPO&INPIT
|
