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A fuel injection system for a diesel engine having injection and metering modes of operation for delivering fuel to an engine comprising a plurality of fuel injectors wherein each of said fuel injectors comprise a first port, a second port and a metering chamber for storing a premetered quantity of

A fuel injection system for a diesel engine having injection and metering modes of operation for delivering fuel to an engine comprising a plurality of fuel injectors wherein each of said fuel injectors comprise a first port, a second port and a metering chamber for storing a premetered quantity of fuel, during the metering mode of operation, prior to the injection of said premetered quantity of fuel into the engine during the injection mode of operation. The system further includes manifold means for connecting in fluid communication each of second ports of each of said fuel injector, pressure regulating means connected between said manifold means and a fuel reservoir for regulating and for supplying fuel at said second determinable pressure to said second inlet port of each of the injectors and distributor pump means connected to the said first port of each of said fuel injectors and to the fuel reservoir for sequentially pressurizing the first port of a particular injector at a pressure greater than the pressure established by the pressure regulating means causing the piston to stabilize at the bottom of its stroke and sequentially thereafter lowering said first pressure level to a pressure lower than that of the pressure established by said pressure regulating means thereby causing said piston to move causing said premetered quantity of fuel to enter said metering chamber of a particular one of said injectors through said second port and for sequentially thereafter increasing said first pressure level thereby causing said piston to pressurize the fuel within said metering chamber to initiate fuel injection into the engine through a nozzle.

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A fuel injection system for a diesel engine having an injector and metering modes of operation for delivering fuel from a fuel reservoir to the cylinders of a engine comprising: a plurality of fuel injectors wherein each of said fuel injectors comprise: a housing having a first port (45) adapted to

A fuel injection system for a diesel engine having an injector and metering modes of operation for delivering fuel from a fuel reservoir to the cylinders of a engine comprising: a plurality of fuel injectors wherein each of said fuel injectors comprise: a housing having a first port (45) adapted to receive fuel at a first determinable pressure level, a second port (47) adapted to receive fuel at a second determinable pressure level and a nozzle (194), and further having metering chamber means (186) connected to said second port, for storing a premetered quantity of fuel, during the metering mode of operation, prior to the injection of said premetered quantity of fuel into the engine during the injection mode of operation; piston means (170) responsive to the differential fuel pressure applied thereacross having a first pressure receiving surface (176) in fluid communication with said first port and a second pressure receiving surface (188) in fluid communication with said second port for reciprocatively moving within said housing or selectively compressing and for causing said premetered quantity of fuel to exit said metering chamber means and to be injected into said engine, through said nozzle, during the injection mode and for selectively permitting fuel to reenter said metering chamber means during a subsequent metering mode; manifold means for connecting in fluid communication each of second ports of each of said fuel injector; pressure regulating means connected between said manifold means and the fuel reservoir for regulating and for supplying fuel at said second determinable pressure to said second inlet port of each of said injectors and for returning to the reservoir excess fuel received from said injectors; distributor pump means connected to the said first port of each of said fuel injectors and to the fuel reservoir for sequentially pressurizing said first port of a particular fuel injector at a pressure greater than the pressure established by said pressure regulating means causing said piston to stabilize at the bottom of its stoke and sequentially thereafter lowering said first pressure level to a pressure lower than that of the pressure established by said pressure regulating means thereby causing said piston to move causing said premetered quantity of fuel to enter said metering chamber means of a particular one of said fuel injectors through said second port and for sequentially thereafter increasing said first pressure level thereby causing said piston to pressurize the fuel within said metering chamber means to initiate fuel injection into the engine through said nozzle.