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In a fuel supply system for an internal combustion engine, a method for controlling fuel quantity delivery from a high pressure, reciprocating piston, engine-driven fuel pump to a high-pressure common rail having a plurality of fuel injection nozzles for injecting fuel into the cylinders of the engi

In a fuel supply system for an internal combustion engine, a method for controlling fuel quantity delivery from a high pressure, reciprocating piston, engine-driven fuel pump to a high-pressure common rail having a plurality of fuel injection nozzles for injecting fuel into the cylinders of the engine. At least two control regimes are established corresponding to a respective low engine speed pump operation and high engine speed pump operation. During low speed operation, unregulated low pressure fuel is fed to the pumping pistons and at a location between the pistons and the common rail, excess fuel discharged from the pistons is diverted to a location of relatively low pressure in the fuel supply system, upstream of the pistons. During high-speed operation, the quantity of low pressure feed fuel pressurized by the pumping pistons is regulated and all of the fuel discharged from the pistons is delivered to the common rail.

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In a fuel supply system for an internal combustion engine, a method for controlling fuel quantity delivery from a high pressure, reciprocating piston, engine-driven fuel pump to a high-pressure common rail having a plurality of fuel injection nozzles for injecting fuel into the cylinders of the engi

In a fuel supply system for an internal combustion engine, a method for controlling fuel quantity delivery from a high pressure, reciprocating piston, engine-driven fuel pump to a high-pressure common rail having a plurality of fuel injection nozzles for injecting fuel into the cylinders of the engine. At least two control regimes are established corresponding to a respective low engine speed pump operation and high engine speed pump operation. During low speed operation, unregulated low pressure fuel is fed to the pumping pistons and at a location between the pistons and the common rail, excess fuel discharged from the pistons is diverted to a location of relatively low pressure in the fuel supply system, upstream of the pistons. During high-speed operation, the quantity of low pressure feed fuel pressurized by the pumping pistons is regulated and all of the fuel discharged from the pistons is delivered to the common rail. atch and a second substantially clear latch and respective first and second LEDs mounted beneath the first and second substantially clear latches. 21. The system of claim 20, wherein upon sensing a component failure, the system further includes a means for illuminating either the first or second LED associated with the failed component. 22. The system of claim 20, wherein upon sensing a component failure, the system further includes means for illuminating both the first and second LEDs associated with the failed component. 23. A failure identification system for a planar comprising: a diagnostic program for detecting a failed component; a dual in-line memory module (DIMM); and at least one substantially clear latch coupled to the DIMM for securing the DIMM to the planar, the at least one substantially clear latch further including a handle portion coupled to a connector portion, the connector portion being adapted to accommodate a light emitting element mounted on the planar beneath the connector portion, whereby when the diagnostic program detects a failed DIMM, it activates the light emitting element beneath the connector portion associated with the at least one substantially clear latch coupled to the failed DIMM. 24. The system of claim 23, wherein the handle portion is rotatably coupled to the connector portion. 25. The system of claim 23, wherein a first substantially clear latch and a second substantially clear latch are coupled to opposing ends of the module. 26. The syste