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    Fuel injection valve
    2.
    发明公开
    Fuel injection valve 有权
    燃油喷射阀

    公开(公告)号：EP1469192A1

    公开(公告)日：2004-10-20

    申请号：EP04008611.8

    申请日：2004-04-08

    申请人： NISSAN MOTOR COMPANY, LIMITED

    发明人： Hamada, Takahiro ,  Mabuchi, Yutaka ,  Kano, Makoto ,  Azuma, Yuuji

    IPC分类号： F02M61/16 ,  F02M61/12

    CPC分类号： F02M61/168 ,  F02M61/166 ,  F02M2200/02 ,  F02M2200/9038 ,  F02M2200/9046

    摘要： A fuel injection valve for an automotive internal combustion engine comprises a needle valve and an opposite member which are in slidable contact with each other in presence of fuel. A hard carbon thin film is coated on at least one of the sliding sections of the base materials of the needle valve and the opposite member. The hard carbon thin film has a surface hardness ranging from 1500 to 4500 kg/mm 2 in Knoop hardness, a film thickness ranging from 0.3 to 2.0 µm, and a surface roughness (Ry) (µm) which satisfies a relationship represented by the following formula (A):
          Ry
          where h is the thickness (µm) of the hard carbon thin film; Hk is the surface hardness in Knoop hardness (kg/mm 2 ) of the hard carbon thin film.

    摘要翻译： 一种用于汽车内燃机的燃料喷射阀包括针阀和相对构件，所述针阀和相对构件在存在燃料的情况下彼此可滑动地接触。 硬质碳薄膜涂覆在针阀和相对构件的基材的至少一个滑动部分上。 硬质碳薄膜的努普硬度为1500〜4500kg / mm2，膜厚为0.3〜2.0μm，表面粗糙度（Ry）（μm）满足下式 （A）：Ry <（0.75-Hk / 8000）×h + 0.0875其中h是硬碳薄膜的厚度（μm） Hk是硬碳薄膜的努普硬度（kg / mm2）中的表面硬度。