HIGH-PRESSURE PUMP PROVIDED WITH REMOVABLE ON/OFF VALVE TO FEED FUEL TO INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a high-pressure pump which is extremely simple and high in reliability having an ON/OFF valve inexpensive in manufacture and easy in assembly to eliminate disadvantages of a known pump having an ON/OFF valve. SOLUTION: This pump has a body 8 including at least one fuel compression chamber and one operation chamber to surround a working member of the pump, an ON/OFF valve 34 is demarcated by an independent operating assembly to be inserted inside a hole 32 in the body 8 in a fluid-tight manner. The hole 32 connects an intake conduit 33 to a feed conduit 30 of the operating chamber and the compression chamber, the valve 34 assembly has a sleeve, the sleeve is located on a fuel feed conduit 30, and has an opening part 56 to be closed by a shutter 38 sliding inside the sleeve. The sleeve has two seats for two seals located on the sides opposite to each other of the opening part 56. The feed conduit 30 is straight, and can be formed using a drilling tool through the hole 32.