Arrangement for amplifying fuel pressure for fuel injector for internal combustion engine

摘要

The arrangement has a supply (1) of pressurised medium, a pressure amplifier (3) and a servo-valve (24) operated by an actuator (21) in the pressure line (17) between the pressure supply and the control chamber (32) of the pressure amplifier. The servo-valve is designed so that the pressure line is open in the non-actuated initial state and the pressure line is closed and the control chamber held at null pressure in the actuated state.