Fuel injection valve and fuel injection valve controller

A fuel injection valve, comprising;

• a body including
• a first chamber that supplies fuel at a first pressure,
• a second chamber that supplies fuel at a second pressure, the second pressure being lower than the first pressure, and
• an injection hole;
• a valve chamber member including a valve chamber, the valve chamber being connectable to the first chamber and the second chamber;
• a control chamber member including a control chamber, the control chamber being connectable to the first chamber;
• a needle, the needle being pressed by pressure of fuel in the control chamber in a direction that causes fuel injection from the injection hole to stop;
• an actuator driven to extend and contract;
• a valve element that
• blocks the second chamber from the valve chamber and connects the first chamber, the valve chamber, and the control chamber with each other when the actuator is in a contracted state, and
• changes position when the actuator extends to connect the second chamber, the valve chamber, and the control chamber with each other and block the first chamber from the control chamber;
• and
• a transmission mechanism that transmits a force generated by the actuator extending, which causes the valve element to displace, to the needle as a force in a direction that causes fuel to be injected from the injection hole.