Fuel injection system for internal combustion engines

Claim 1

A fuel injection system for internal combustion engines having at least one inlet line and one outlet line for fuel flow, at least one pump piston to supply said fuel to an injection valve of said engine, said system further including a control apparatus, said control apparatus including at least one work chamber, a movable element in said work chamber, means for coupling said movable element with an adjusting device of the fuel pump piston, at least one pressure line connected to said work chamber, a pressure fluid quantity control device for controlling fluid under pressure in said at least one pressure fluid line of the work chamber, an electrical control device electrically connected to said pressure fluid quantity control device for controlling a fluid flow path through said pressure fluid quantity control device to said at least one work chamber, characterized in that said pressure fluid quantity control device is an electro-fluidic converter which comprises a fluid stream tube that is elastically deflectable out of an outset position by means of at least one electromagnet, said fluid stream tube communicates with a fluid input source at one end and includes a nozzle outlet and said electro-fluidic converter has first and second interceptor nozzles and the fluid stream tube can be controlled by the electrical control apparatus to overlap one of said interceptor nozzles by deflection of the fluid stream tube out of an outset position or brought into an intermediate position thereof, in which the nozzle outlet of said fluid stream tube is located between said first and second interceptor nozzles and wherein said first interceptor nozzle communicates via a first pressure fluid line with the work chamber on one end of said movable element and the second interceptor nozzle communicates via a second pressure line with said work chamber on an opposite end of said movable element from that of said first pressure line.