Patent ID: 7891587

Claim:
In an intermediate plate for a fuel injector, having a high-pressure through-hole, which connects a high-pressure passage in a valve body and is in communication with a high-pressure chamber fuel reservoir, with a high-pressure chamber in a nozzle body, the intermediate plate being disposed between the valve body and the nozzle body, the improvement wherein: the high-pressure through-hole having a cross-sectional course by which the flow through the high-pressure through-hole from the valve body to the nozzle body is improved and in the opposite direction from the nozzle body to the valve body is worsened, the high-pressure through-hole being conically shaped and tapering in a first direction, said intermediate plate including a further through-hole, said further through-hole being conically shaped and tapering in a second direction, said second direction being opposite said first direction, the intermediate plate having a first surface and a second surface and both the conically shaped high-pressure through-hole and the conically shaped further through-hole extending completely through the intermediate plate from the first surface to the second surface and, wherein each through-hole has a sloping conical surface which extends completely through the intermediate plate such that the sloping conical surface of each through-hole extends completely through the intermediate plate from the first surface to the second surface.