| 摘要 |
PCT No. PCT/GB95/00043 Sec. 371 Date Jul. 2, 1996 Sec. 102(e) Date Jul. 2, 1996 PCT Filed Jan. 11, 1995 PCT Pub. No. WO95/19498 PCT Pub. Date Jul. 20, 1995A fuel pumping apparatus of the rotary distributor type has an annular cam ring (12) which is coupled to a tangentially disposed piston (15) slidable in a cylinder (16) formed in a body part (10). The body is formed from light alloy and the piston from steel. The piston is provided with a blind recess (28) at one end and a steel spigot (19) is slidable within the recess. The blind end of the recess communicates with the adjacent end of the cylinder (16) through a restricted passage (23) and a non-return valve (26). Fuel at a varying pressure is applied to the one end of the cylinder to vary the setting of the cam ring.
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