Abstract: A fuel injector for fuel-injection systems of internal combustion engines. The fuel injector includes an electromagnetic actuating element having a solenoid coil, a core and a valve cover as external solenoid circuit component, and a movable valve-closure element, which cooperates with a valve-seat surface assigned to a valve-seat body. The core and a connection pipe are fixedly connected in an inner opening of a thin-walled valve sleeve by being pressed into place, and the valve cover at the outer circumference of the valve sleeve is firmly connected to the valve sleeve by being pressed onto it. The firm press-fitted connection of in each case two of these metallic components of the fuel injector is characterized by the fact that at least one of the partner components has in its press-fitting region a structure with score marks, and/or the particular press-fitting region has an intake rounding in at least one transition to an adjoining component section.

Abstract: A fuel injector for fuel injection systems of internal combustion engines is described. The fuel injector includes an electromagnetic actuating element having a magnetic coil, a core and a valve jacket as the outer magnetic circuit component and a movable valve-closure member which interacts with a valve-seat surface assigned to a valve-seat member. The core and a connecting tube in an inner opening of a thin-walled valve sleeve and the valve jacket on the outer circumference of the valve sleeve are firmly connected to the valve sleeve by pressing them therein/thereon. The fixed press connection between two of these metallic components of the fuel injector is characterized in that at least one of the component partners has a structure including grooves in its press area and/or the particular press area has an inlet rounding in at least one transition to an adjacent component section.

Abstract: A fuel injector for fuel-injection systems of internal combustion engines. The fuel injector includes an electromagnetic actuating element having a solenoid coil, a core and a valve cover as external solenoid circuit component, and a movable valve-closure element, which cooperates with a valve-seat surface assigned to a valve-seat body. The core and a connection pipe are fixedly connected in an inner opening of a thin-walled valve sleeve by being pressed into place, and the valve cover at the outer circumference of the valve sleeve is firmly connected to the valve sleeve by being pressed onto it. The firm press-fitted connection of in each case two of these metallic components of the fuel injector is characterized by the fact that at least one of the partner components has in its press-fitting region a structure with score marks, and/or the particular press-fitting region has an intake rounding in at least one transition to an adjoining component section.

Abstract: A fuel injector for fuel injection systems of internal combustion engines is described. The fuel injector includes an electromagnetic actuating element having a magnetic coil, a core and a valve jacket as the outer magnetic circuit component and a movable valve-closure member which interacts with a valve-seat surface assigned to a valve-seat member. The core and a connecting tube in an inner opening of a thin-walled valve sleeve and the valve jacket on the outer circumference of the valve sleeve are firmly connected to the valve sleeve by pressing them therein/thereon. The fixed press connection between two of these metallic components of the fuel injector is characterized in that at least one of the component partners has a structure including grooves in its press area and/or the particular press area has an inlet rounding in at least one transition to an adjacent component section.

Abstract: A fuel injector for fuel injection systems of internal combustion engines is described. The fuel injector includes an electromagnetic actuating element having a magnetic coil, a core, and a valve jacket as an outer magnetic circuit component and a movable valve closing body which interacts with a valve seat surface assigned to a valve seat body. The core and a connecting tube are fixedly joined in an inner opening of a thin-walled valve sleeve and the valve jacket at the outer circumference of the valve sleeve by pressing in or on. The fixed compression joint of two of these metallic components of the fuel injector is characterized in that at least one of the components has a surface-roughening structure in its compression area, it being possible to create the surface-roughening structure using a laser and metal oxides being deposited on the structure.

Abstract: A fuel injector for fuel injection systems of internal combustion engines is described. The fuel injector includes an electromagnetic actuating element having a magnetic coil, a core, and a valve jacket as an outer magnetic circuit component and a movable valve closing body which interacts with a valve seat surface assigned to a valve seat body. The core and a connecting tube are fixedly joined in an inner opening of a thin-walled valve sleeve and the valve jacket at the outer circumference of the valve sleeve by pressing in or on. The fixed compression joint of two of these metallic components of the fuel injector is characterized in that at least one of the components has a surface-roughening structure in its compression area, it being possible to create the surface-roughening structure using a laser and metal oxides being deposited on the structure.