Fuel injector

DRIVE January 14, 2004
Source
A fuel injector comprising a nozzle body (10; 10a 10b) provided with first and second outlet openings (15, 21) for fuel and a valve needle (12) slidable within a valve needle bore (11; 65a) defined in the nozzle body (10; 10a, 10b). The valve needle bore (11; 65a) is shaped to define a seating (11b; 72) with which the valve needle (12) is engageable to control fuel flow to a chamber (14), the valve needle (12) being provided with a flow passage (17) communicating with the chamber (14) and a first annular recess (50) communicating with the first outlet opening (15). Movement of the valve needle (12) away from the seating (11b; 72) into a first fuel injecting position causes the chamber (14) to communicate with the first annular recess (50) to permit fuel delivery through the first outlet opening (15) and movement of the valve needle (12) away from the seating (11b; 72) into a second fuel injecting position causes fuel in the chamber (14) to flow through the flow passage (17) for delivery through the second outlet opening (21).

Discussion in the ATmosphere

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