| 摘要 |
Pump (1) for supplying fuel at high pressure to an internal combustion engine, of the type comprising: a head (4); an elongate piston (7) which engages, in an axially slidable manner, a first cylindrical cavity (8) created in the head (4), forming, inside the same head (4), a variable-volume chamber (9) intended to receive the fuel to be pumped to the internal combustion engine; and a ring seal (18) which is positioned inside the first cylindrical cavity (8) so as to be engaged in a passing manner by the piston (7), the pump also comprising a sleeve (19) having a rectilinear through hole (20) which can be engaged in a passing and axially slidable manner by a portion of the piston (7). |
