| 摘要 |
<p>The invention relates to a fuel injection valve and a welding method, the fuel injection valve comprises a tubular body and a valve seat member, wherein, the tubular body allows the fuel to flow therein and the valve seat member includes an inner circumferential surface formed with a valve seat surface thereon; the welding method comprises the steps that: the valve seat member is inserted into the tubular body; and heat is applied via two energy appliers to two points of the tubular body so that the tubular body can be welded to the valve seat member in the circumferential direction of the tubular body, wherein, two points are different from each other both in the circumferential direction of the tubular body and in the axial direction of the tubular body.</p> |
