DRIVE UNIT FOR ELECTRIC INJECTOR OF COMMON RAIL FUEL INJECTION SYSTEM OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To surely drive electric injectors of a common rail fuel injection system of an internal combustion engine. SOLUTION: There is provided a control circuit 43 which controls the actuation of a power circuit 42 for each electric injector 12. The control circuit 43 includes: several control modules 44 each of which controls switches 27, 28, 29 of each drive circuit 11 selectively and supplies a condition signal SFLAGshowing the operating state of the control module 44; and a synchronizing module 45 which receives and processes the condition signal SFLAGso as to generate a common synchronization signal SSINCfor synchronizing the control modules 44. Each control module 44 is adjusted by synchronizing as a function of the synchronization signal SSINCthe driving action given to the switches 27, 28, 29 of the drive circuit 11 with the driving action given to the switches 27, 28, 29 corresponding to another control module. COPYRIGHT: (C)2005,JPO&NCIPI