| 摘要 |
A fuel injection pump includes a cam which is movable to vary the timing of delivery of fuel by the injection pump. The cam is acted upon by a first piston which is subjected to the outlet pressure of a supply pump the piston acting on the cam to advance the timing of delivery of fuel. A second piston is provided which is subjected to the outlet pressure of the feed pump only when the engine speed attains a predetermined value. The first piston can move the cam against the action of a first light spring and a second relatively strong spring, the second spring being prestressed and being accommodated in the second piston. |
