LIQUID CONTROL VALVE

摘要

The invention relates to a liquid control valve which is provided, for its operation, with a bonding chamber (30) that is filled with liquid and placed between a multiplication piston (35) to be actuated by a piezoelectric element (32) and a piston which actuates a valve member. In order to compensate for a leakage occurring inside the bonding chamber (30) when under high pressure, a charging valve (39) is provided between the multiplication piston (35) and the piezoelectric actuator (32). At each return stroke by the piezoelectric actuator, the multiplication piston follows with a delay time, so that the charging valve (39) opens briefly and enables thereby the bonding chamber to be filled (30). The inventive charging valve is intended for use in fuel injection systems of internal combustion engines for vehicles.