| 摘要 |
<p>In a fuel injector (30) in which a valve body (36) which allows a valve piston (35) to be slidably inserted therein is arranged in the inside of an injector housing (32), one end of the valve piston (35) is arranged to face a control pressure chamber (364) formed in the inside of the valve body (36), and a high-pressure fuel is supplied to the inside of the control pressure chamber (364) from the injector housing (32), in the inside of the injector housing (32), on an annular stepped portion (321A) which is configured to be aligned with an injector axis, a large-diameter portion (361) of the valve body (36) which forms the control pressure chamber (364) therein and corresponds to the annular stepped portion (321A) is seated by way of a seal plate (50) in which an orifice (501) parallel to the injector axis is formed, and high pressure fuel supplied from the injector housing (32) side is supplied to the inside of the control pressure chamber (364) through an oil passage formed in the inside of the large-diameter portion (361) by way of the orifice (501).</p> |
