FIELD: engines and pumps.
SUBSTANCE: invention relates to fuel systems in internal combustion engines. Disclosed are various methods of identifying deterioration of fuel system. According to one version of the invention implementation, the method of using the fuel system includes a pulse message to the fuel pump in response to recording that the fuel priming pump pressure corresponds to the fuel vapor pressure, stopping pulse message in response to recording that fuel priming pump pressure corresponds to reset pressure control point, and indicating deterioration of fuel system state, if the detected fuel pressure of the fuel feed pump is deviated from the expected pressure of the fuel priming pump, including discrimination of the deterioration of the state of the fuel pump, the low pressure fuel pressure sensor, the fuel rail pressure sensor and the pressure release valve.
EFFECT: cause of deterioration of fuel system can be identified and compensated.
20 cl, 7 dwg
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