METHOD OF DIAGNOSING ENGINE FUEL SYSTEM WITH INJECTION OF LIGHT FUEL Russian patent published in 2013 - IPC F02M65/00 

FIELD: engines and pumps.

SUBSTANCE: proposed method comprises defining parameters of fuel pressure variation in fuel delivery line and testing solenoid injectors. Said parameters are fixed by fluid pressure indicating gage with current output for display of received signal in electronic unit and outputting said signal ad display without dismantling said injectors. Definition of said parameters testing of solenoid injectors are executed with shutdown engine by connecting reference solenoid valve to fuel deliver line and electronic control unit of electric circuits of said injectors and electrically drive fuel pump. Then, said pump is cut in to develop working fuel pressure in fuel delivery line by feeding electric control pulses generated by electronic control unit to reference solenoid valve and solenoid valves. Solenoid injectors are checked by comparing fuel pressure drop in delivery line on opening reference solenoid vale and solenoid injectors.

EFFECT: higher validity of tests, absolute values of working parameters.

2 dwg