Robert Boschgmbh

Takuya Mizobe

Martin Maier

Juergen Graner

Juergen Lander

Volker Sohm

Bernd Rieg

Stefan Oetinger

Marco Zucchini

Zhengyu Liu

Takashi Shigematsu

Michael Klimenko

Subbiah Sivapriya

A Augustin Gandhiraj

A fuel injector for fuel-injection systems of internal combustion engines includes an electromagnetic actuating element having a solenoid coil, a fixed core, an outer magnetic circuit component, and a movable armature for actuating a valve-closure element, which cooperates with a valve-seat surface provided on a valve-seat element. The injector is characterized by its extremely small outer dimensions. The flexibility in the installation of fuel injectors of varying valve lengths, which is made possible very simply due to the special modular design, is significantly increased in this manner. An optimized dimensioning of the electromagnetic circuit allows for a DFR (dynamic flow range) greater than 17, the DFR being defined as the quotient of q/q.

Fuel injection valve

A fuel injector for fuel injection systems of internal combustion engines. The valve includes an electromagnetic actuating element which has a solenoid, a solid core, an external magnetic circuit component, and a movable armature for activating a valve closing member which cooperates with a valve seat surface provided on a valve seat member. The valve has extremely small outer dimensions. By optimizing the dimensions of the electromagnetic circuit, the outer diameter of the external magnetic circuit component in the peripheral area of the solenoid is 10.5 mm&#x3c;D&#x3c;13.5 mm. This increases the flexibility in installing fuel injectors having different valve lengths, which are made possible due to the special modular design. The valve is suitable as a fuel injector in particular for use in fuel injection systems of mixture-compressing, spark ignition internal combustion engines.

Fuel injector

A composite component includes at least two sections having different magnetization, the at least two sections in the integrally formed component lying directly next to each other. The base material of the composite component is a semi-austenitic steel. A first section has a higher saturation polarization Jthan an adjacent second section, the second section having a minimum saturation polarization Jof 0.1 T to 1.3 T and/or a maximum relative permeability &#x3bc;of 2 to 150. The composite component is suitable for use in electromagnetic valves, e.g., in fuel injectors of internal combustion engines.

Metallic composite component, in particular for an electromagnetic valve

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Ludwigsburg, Germany

Takuya Mizobe