| 摘要 |
A unit injector has a pump body (10) against an end wall of which is located a member (16). Opening onto the end wall of the pump body is a pair of passages (28, 29) one of which communicates directly with the pumping chamber (14) and the other of which communicates with the chamber through a spill valve (26). A cap nut (17) is engaged with the pump body and defines a pair of axially spaced ports (31, 32) and the one port (31) communications through a chamber (30) with the ends of said pair of passages (28, 29). The choice as to which of said passages shall communicate with the other port (32) is made by inserting a plug (35) into the end of the selected passage and forming a drilling (34) between the selected passage and the other port. |
