Internal combustion engine with injection valves

The fuel injection valve (14), for an internal combustion motor, is pressed by a spring (38) against a flat limit stop (28) in the drilling (12) which holds it at the cylinder head (10). A seating ring (30) is between the injection valve (14) and the limit stop (28), with a cambered or conical limit surface on the side towards the injector and a flat surface towards the limit stop, or vice versa. The spring (38) and seating ring (30) form a one-piece unit with the injector valve (14).