FUEL INJECTION VALVE

Japanese Patent JP2017227152

A

PROBLEM TO BE SOLVED: To provide a fuel injection valve capable of properly switching injection holes for injecting a fuel.SOLUTION: A fuel injection valve 1 includes a housing 20, an outer needle 50, an inner needle 40, a driving portion 10, a cylindrical member 60, a first spring 31, and an outer spring 33. The housing has a central injection hole 26 formed on an end portion at one side of a center shaft, and outer injection holes 27. The outer spring energizes the outer needle to the other side of the center shaft. In a state free from action of driving force by the driving portion, energization force Fs of the outer spring satisfies a relationship of Pf×Ai