| 摘要 |
<p>An electromagnetic fuel injection valve is provided in which a cylindrical magnetic body is welded to a valve seat member having at the rear end thereof a tubular press-fit portion press-fitted into a front portion of the cylindrical magnetic body, a valve body is housed in the valve seat member while being spring-biased in a direction that seats the valve body on a valve seat, and a movable core facing a fixed core is coaxially connected to the valve body, wherein the valve seat member (10) includes the tubular press-fit portion (10a), a large diameter portion (10b) that has substantially the same outer diameter as the outer diameter of the cylindrical magnetic body (9), and an annular shoulder portion (10c) that is formed as a flat face perpendicular to the outer peripheral face of the tubular press-fit portion (10a) and provides a connection between the tubular press-fit portion (10a) and the large diameter portion (10b), an annular abutment receiving face (9a) at the front end of the cylindrical magnetic body (9) is formed so as to define a right angle relative to the inner peripheral face of the cylindrical magnetic body (9), the annular abutment receiving face (9a) abutting against the annular shoulder portion (10c) over substantially the entire face, and the front end of the cylindrical magnetic body (9) and the abutment portion of the valve seat member (10) are welded together along the entire periphery. This enables the thickness of the cylindrical magnetic body to be reduced, thus making it small and improving the responsiveness.</p> |
