PURPOSE: To keep off any damage due to excess heating in a solenoid spill valve, by cutting a continuous rated current to the said valve, not resting on a cam angle, when detecting an engine stall, in case of a device which controls the fuel injection quantity controlling solenoid spill valve for energization in making the cam angle a criterion.
CONSTITUTION: A fuel injection pump 42 pressurizes fuel inside a pump room according to rotation and reciprocating motion of a plunger 42G, and distributively feeds it to a fuel injection nozzle 34 via a delivery valve 42L or the like. And, fuel spill timing is varied by the solenoid spill valve 50 installed in a spill port 42K to be interconnected to the pump room whereby a fuel injection quantity is controlled. Then, this solenoid spill valve 50 is controlled for its on-off operations by an electronic control unit 56 on the basis of each output of a reference position sensor 44 and the like. At the abovementioned, since engine speed interruption is not for the specified time long, when detecting an engine stall, a continuous rated current to the solenoid spill valve 50 is forcedly cut off, whereby this valve 50 is made so as to be protected from damage.
KOBAYASHI FUMIAKI
NAGASE MASAOMI
MATSUNO KIYOTAKA
ITO YOSHIYASU
TSUKAMOTO KEISUKE
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