초록 ▼

An electromagnetic fuel injection valve for injecting fuel by opening/closing a fuel flow path, includes a valve seat, a valve element for opening/closing the fuel flow path formed between the valve seat and the valve element, and a drive unit having at least one coil for driving the valve element.

An electromagnetic fuel injection valve for injecting fuel by opening/closing a fuel flow path, includes a valve seat, a valve element for opening/closing the fuel flow path formed between the valve seat and the valve element, and a drive unit having at least one coil for driving the valve element. The drive unit includes a first magnetomotive force generating device using the at least one coil and a second magnetomotive force generating device, the first magnetomotive force generating device and the second magnetomotive force generating device being composed so that the first magnetomotive force generating device generates and raises its magnetomotive force at a larger rate of change in time in comparison with the second magnetomotive force generating device. A valve open state is held by the second magnetomotive force generating device which uses a smaller current flow in comparison with the first magnetomotive force generating device.

대표청구항 ▼

[ What is claimed is:] [1.] An electromagnetic fuel injection valve for injecting fuel by opening/closing a fuel flowing path, including a valve seat, a valve element for opening/closing said fuel flowing path formed between said valve seat and said valve element, and drive means having at least one

[ What is claimed is:] [1.] An electromagnetic fuel injection valve for injecting fuel by opening/closing a fuel flowing path, including a valve seat, a valve element for opening/closing said fuel flowing path formed between said valve seat and said valve element, and drive means having at least one coil for driving said valve element, wherein said drive means includes first magnetomotive force generating means using said at least one coil and second magnetomotive force generating means, said first magnetomotive force generating means and said second magnetomotive force generating means being composed so that said first magnetomotive force generating means generates and raises its magnetomotive force at a larger rate of change in time in comparison with that of said second magnetomotive force generating means.