| 摘要 |
<p>Fuel injector (1), comprising a main tubular body (2), provided with at least one through pipe (3) which ends in a spray nozzle (4) which can spray the fuel present inside the through pipe (3), and a shutter unit (5), which is mobile axially inside the said through pipe (3), from and towards a position of closure, in which the shutter unit (5) itself abuts a sealing surface (7) provided on the spray nozzle (4), and seals it in a fluid-tight manner; the shutter unit (5) being made of a cup-type body, the base (9) of which is defined by a sealing disc (9) made of flexible material, on which there are provided an annular sealing projection (10) and an annular stop projection (11), which is co-axial relative to the former; the annular stop projection (11) having a height (h'') which is lower than the annular sealing projection (10), such as to abut the sealing surface (7) of the spray nozzle (4) only temporarily, subject to resilient deformation of the sealing disc (9) itself. <IMAGE> <IMAGE></p> |
