Electromagnetically actuable fuel injection valve

An electromagnetically actuable fuel injection valve for a fuel injection system of an internal combustion engine, comprising:

• a valve housing;
• a magnetic coil at least partially surrounding the valve housing;
• a valve closing element cooperating with the valve housing and being responsive to the magnetic coil, the valve closing element lifting off from a valve seat when the magnetic coil is excited and releasing fuel into an outlet area;
• at least one diaphragm disposed downstream of the valve seat and having an outer periphery defining at least one metering gap, the at least one diaphragm oscillating in the outlet area in response to a pressure of the fuel released into the outlet area and including a first diaphragm and a second diaphragm, the at least one metering gap including a first metering gap and a second metering gap;
• and
• an annular element adjoining the valve seat and being coupled to the valve seat via an inflow channel, wherein an inner portion of the annular element forms a recess, the recess having at least one side wall that tapers upstream counter to a direction of a flow of fuel, the first diaphragm and the recess defining a first oscillation space, the second diaphragm and the recess defining a second oscillation space, the first diaphragm partially converting the first oscillation space and defining the first meeting gap, the second diaphragm partially covering the second oscillation space and defining the second metering gap, and
• wherein an alternating flow of fuel is emitted via the first and second metering gaps when the valve is opened with a high frequency, the high frequency being determined as a function of the first and second diaphragms.

An electromagnetically actuable fuel injection valve for a fuel injection system of an internal combustion engine, comprising:

• a valve housing;
• a magnetic coil at least partially surrounding the valve housing;
• a valve closing element cooperating with the valve housing and being responsive to the magnetic coil, the valve closing element lifting off from a valve seat when the magnetic coil is excited and releasing fuel into an outlet area;
• at least one diaphragm disposed downstream of the valve seat and having an outer periphery defining at least one metering gap, the at least one diaphragm oscillating in the outlet area in response to a pressure of the fuel released into the outlet area and including a first diaphragm and a second diaphragm;
• and
• an annular element adjoining the valve seat and being coupled to the valve seat via an inflow channel, wherein an inner portion of the annular element has a recess, the recess having a side wall that tapers upstream counter to a direction of a flow of fuel, and
• wherein the first diaphragm has a first outer edge portion and the second diaphragm has a second outer edge portion, the first diaphragm extending from a first shoulder portion of the annular element toward the second diaphragm, the second diaphragm extending from a second shoulder portion of the annular element, the area between the first and second outer edge portions defining the at least one metering gap.

A device for modulating an emerging jet fuel from an electromagnetically actuable fuel injection valve for a fuel injection system of an internal combustion engine having a valve housing, a magnetic coil at least partially surrounding the valve housing, and a valve closing element cooperating with the valve housing and being responsive to the magnetic coil, the valve closing element lifting off from a valve seat when the magnetic coil is excited and releasing fuel into an outlet area, the device comprising:

• at least one diaphragm disposed downstream of the valve seat and having an outer periphery defining at least one metering gap, the at least one diaphragm oscillating in the outlet area in response to a pressure of the fuel released into the outlet area and including a first diaphragm and a second diaphragm, the at least one metering gap including a first metering gap and a second metering gap;
• and
• an annular element adjoining the valve seat and being coupled to the valve seat via an inflow channel, wherein an inner portion of the annular element has a recess, the recess having a side wall that tapers upstream counter to a direction of flow of fuel, the first diaphragm and the recess defining a first oscillation space, the second diaphragm and the recess defining a second oscillation space, the first diaphragm partially covering the first oscillation space and defining the first metering gap, the second diaphragm partially covering the second oscillation space and defining the second metering gap, and
• wherein an alternating flow of fuel is emitted via the first and second metering gaps when the valve is opened with a high frequency, the high frequency being determined as a function of the first and second diaphragms.