Sealing device of delivery valve for fuel injection units
AssigneeDiesel Kiki Co., Ltd.
InventorHisashi Nakamura
Life of this patent
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Abstract
A sealing device of a delivery valve having a valve holder accommodating a valve body, and a valve seat fitted into an opening of the valve holder. The end portion of the valve holder has an end face thereof formed with an annular radially outer slant face moderately slanting with respect to an open end plane perpendicular to an axis of the valve holder, and an annular radially inner vertical face extending continuously from the annular radially outer slant face along a plane perpendicular to the open end plane, thereby ensuring positive sealing between the valve holder and the valve seat.
Claims5
In a sealing device of a delivery valve of a fuel oil injection unit for use in an internal combustion engine, said delivery valve including a valve body, a valve holder having a valve bore formed therein and accommodating said valve body, and an end portion defining therein an opening of said valve bore, a valve seat fitted into said opening of said end portion of said valve hOlder in an airtight manner, said valve seat having an axial through bore formed therethrough and slidably receiving said valve body, and a coiled spring received within said valve bore of said valve holder and urging said valve body toward said valve seat,
- the improvement wherein said end portion of said valve holder has an end face thereof formed with an annular radially outer slant face moderately slanting with respect to an open end plane perpendicular to an axis of said valve holder, and an annular radially inner vertical face extending continuously from said annular radially outer slant face along a plane perpendicular to said open end plane.
Dependencies are inferred from the claim text.