High-pressure pump with a removable on-off valve for feeding fuel to an internal combustion engine

摘要

The pump (5) has a body (8) including at least a fuel compression chamber (22) and an actuating chamber (23) enclosing the actuating members of the pump (5); the on-off valve (34) is defined by an independent operating assembly insertable in fluidtight manner inside a hole (32) in the body (8); the hole (32) connects an inlet conduit (33) to the actuating chamber (23) and to a feed conduit (30) of the compression chamber (22); the assembly of the valve (34) has a sleeve (36) in turn having an opening (56) located at the fuel feed conduit (30) and which is closed by a shutter (38) sliding inside the sleeve (36); the sleeve has two seats (58, 59) for two seals (61, 62) located on opposite sides of the opening (56); and the feed conduit (30) is straight, and can be formed using a drilling tool through the hole (32).