METHOD TO DETERMINE CYCLIC DELIVERY OF FUEL IN DIESEL ENGINE Russian patent published in 2004 - IPC

FIELD: mechanical engineering; internal combustion engines. SUBSTANCE: invention relates to method of diagnosing condition of diesel internal combustion engines and it can be used for determining cyclic delivery of fuel by high-pressure fuel pump both at testing of engine and at checking of its state in operation. According to proposed method of determining cyclic delivery of fuel in diesel engine by phase shift between beginning of fuel pressure rise pulse in overplunger space of engine fuel injection pump and beginning of fuel pressure rise pulse in head of fuel injection pump, said phase shift is determined at free acceleration of engine at crankshaft speed differing from rated speed by not more than 1%. Free acceleration is provided by initially making the engine operate at minimum stable idling speed and with subsequent sharp shifting of control of crankshaft speed governor to position corresponding to maximum fuel delivery. EFFECT: provision of reliable checking of fuel delivery. 3 cl, 2 dwg