FIELD: internal combustion engines.
SUBSTANCE: methods and systems are provided for closed loop operation of a high pressure fuel pump connected to the direct injectors of an internal combustion engine. During operation of the high pressure pump a dead zone may exist where a substantial change in the pump duty cycle does not correspond to a substantial change in the fuel rail pressure. To operate outside the dead zone, a relationship between the pump duty cycle and fuel rail pressure is determined upon meeting several high-pressure pump and engine operating conditions, thereby improving high pressure pump operation, reducing pump degradation and prolonging pump service life.
EFFECT: invention can be used in fuel management systems for internal combustion engines (ICE).
17 cl, 7 dwg
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