The invention is based on an electromagnetically operable valve as described hereinafter. A valve is already known wherein the valve closing part is radially guided with slight play through the centering opening of a guide membrane. Installing such a valve, however, poses the problem that only in exceptional cases can a truly concentric annular slit be formed between the valve closing part and the centering opening of the guide membrane, so that in the majority of cases the valve closing part abuts the centering opening only with a portion of its circumference. A subsequent deformation of the valve housing in an axial direction causes a subsequent change of the opening stroke to be brought about which may in turn bring about a small radial displacement of the valve seat.
Furthermore, due to the radial displacement of the valve seat and the one-sided engagement by the valve closing part with the centering opening, when the valve is closing, it may occur, that the valve closing part is not guided concentrically relative to the valve seat, thereby preventing uniform sealing around its circumference. This condition can cause leaks, to occur, where the valve closing part and valve seat strike harder in certain places and a force component is applied to the guide membrane on the valve closing part in the direction of the opening of the valve, which force can result in deformation thereof and lead to a change in the injection times during the lifetime of the valve.
Applications (commonly assigned) are pending for similar and related inventions under application Ser. Nos. 518,268, now U.S. Pat. No. 4,527,744; 565,063, now U.S. Pat. No. 4,582,085; and 601,403, now U.S. Pat. No. 4,666,088.