| 摘要 |
PROBLEM TO BE SOLVED: To provide an injector driving device capable of realizing an excellent property of fuel injection quantity at low cost even if there exist variations of wire resistance, etc., from an electromagnetic coil or the driving device to the injector. SOLUTION: Time while voltage supply switches from a first power source to a second power source is actively stabilized by controlling pre-energizing current. Fuel flow, maximum operating fuel pressure, and other properties of the injector can be improved without reducing tolerance of the injector and its driving circuit. As the tolerance can be enlarged if the properties are the same, the injector and its driving circuit can be manufactured at low cost. COPYRIGHT: (C)2005,JPO&NCIPI
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