| 摘要 |
<p>A fuel pump (4) for a direct injection system provided with a common rail (3); the fuel pump (4) has: at least one pumping chamber (14) defined in a main body (12); a piston (15) which is mounted sliding inside the pumping chamber (14); a suction channel (17) connected to the pumping chamber (14) and regulated by a suction valve (18); a delivery channel (19) connected to the pumping chamber (14) and regulated by a delivery valve (20); and a high pressure connection (25), which is welded by a ring weld (26) to a wall of the main body (12) at the delivery channel (19), has the function of allowing a connection to a supply duct (5) that feeds the fuel under pressure to the common rail (3), and has internally a passing through channel (27) through which the fuel coming from the delivery channel (19) flows towards the supply duct (5).</p> |
