| 摘要 |
<p>The purpose of the present invention is to avoid contact over a wide area between a valve face and a valve seat face, generated by non-circularity of the valve face and valve seat face, and thus to suppress seal performance degradation. A fuel injection valve comprises a sheet member (102) having a valve seat face (203), a valve member (101) having a valve face (204) directly contacting the valve seat face (203), and a valve driving means for reciprocally moving the valve member (101), and by reciprocally moving the valve member (101) by the valve driving means, closes a valve by bringing the valve face (204) in contact with the valve seat face (203) and opens the valve by separating the valve face (204) from the valve seat face (203). At least one of the valve seat face (203) or valve face (204) is provided with recesses (501, 502) in the upstream side portion and downstream side portion with respect to a seal seat (202) where the valve face (204) and the valve seat face (203) contact each other.</p> |
