| 摘要 |
<p>PURPOSE:To simplify construction of a driven part, by partitioning the inside of a pump casing into a pump chamber and pressure oil chamber through a diaphragm and communicating the pressure oil chamber to the high pressure side of a lubricating oil passage in an engine through a check valve, then causing the diaphragm to perform shuttle motion with pressure of lubricating oil. CONSTITUTION:If an engine is started, lubricating oil in an oil reservoir 26 is sucked by an oil pump 19 to flow in through a passage 21 and forcibly fed to a lubricated part 20 in the engine simultaneously to flow in through a passage 22 then forcibly fed to a valve chamber 11 of a pump casing 1. The lubricating oil in this chamber 11 flows in through a small notch 14 of a check valve 13 to reach a pressure oil chamber 4, if an oil quantity in the chamber 4 increases, a piston 15 and diaphragm 2 are lifted. As a result, the inside of a pump chamber 3 is pressurized, and a suction valve 8 is closed while a delivery valve 9 is opened to deliver fuel in the chamber 3 to the downstream side of fuel supply passage 10. While the valve 13 is lifted in a follow-up state to said piston 15 or the like, if the valve 13 is seated to a valve seat 12, pressure of oil in the chamber 4 decreases to lower the piston 15 or the like.</p> |
