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AssigneesHitachi, Ltd., Hitachi Car Engineering Co., Ltd.
InventorsMakoto Yamakado, Yoshio Okamoto, Yzo Kadomukai, Yoshiyuki Tanabe, Hiromasa Kubo, Toshio Takahata, Kenji Tabuchi, Yasunaga Hamada
Estimating the term…
Using a control coil having a high response characteristic suited to the valve opening and a hold coil suited to a hold to be held a large force by a small large current, during the valve opening time a high voltage is applied to the control coil suited to the valve opening and during a valve opening hold time a low and stabilized voltage is applied to the hold coil suite to the holding, and then a valve body driven. In a fuel injection apparatus, a drive manner during a valve opening time and a hold time is optimized.
An electromagnetic fuel injection apparatus comprising an electromagnetic fuel injector and a drive circuit for driving said electromagnetic fuel injector, said electromagnetic fuel injector having at least two coils which produce a different time change rate of magnetomotive force, and wherein, to said at least two coils, a different voltage is applied via said drive circuit, each of said at least two coils being coupled to a respective power supply having a different voltage, said drive circuit including a diode for preventing a reverse flow.
An electromagnetic fuel injection apparatus comprising an electromagnetic fuel injector and a drive circuit for driving said electromagnetic fuel injector, said drive circuit including a diode for preventing reverse flow, said electromagnetic fuel injector having at least two coils to produce different time change rates of magnetomotive force, and wherein said drive circuit applies a different voltage to said at least two coils, each of said at least two coils being coupled to a respective power supply having a different voltage.
Dependencies are inferred from the claim text.