Fuel injection valve for motor vehicle IC engine

摘要

The valve is provided with a liquid filled coupling chamber (30) which is arranged between an actuator piston (31) of a piezo actuator (32) and a piston (25) operating a valve element. To compensate for liquid losses, when the coupling chamber stands under a high pressure for a short time, the pressure difference existing between the coupling chamber and both sides of the actuator piston (31) facing away from the coupling chamber and the piston (25) operating the valve element (22) is used.