Fuel injection system for internal combustion engine has closure piston region protruding into closure pressure chamber connected to high-pressure source so source fuel pressure acts on closure piston

摘要

The system has a closure piston with a region protruding into a closure pressure chamber connected to the high pressure source so that the source fuel pressure can act on the closure piston continuously. A pressure chamber is connected to a pressure transfer device so that the closure piston can be moved by controlling the transfer device. The system has a fuel injection valve supplied by a high pressure fuel source (13) with a closure piston displaced by fuel pressure in a pressure chamber to connect it to at least one fuel injection opening. The closure piston (34) has a region protruding into a closure pressure chamber (31) connected to the high pressure source so that the source fuel pressure can act on the closure piston continuously. The pressure chamber (33) is connected to a pressure transfer device (20) so that the closure piston can be moved by controlling the transfer device.