| 摘要 |
<p>PCT No. PCT/AU93/00074 Sec. 371 Date Jul. 19, 1994 Sec. 102(e) Date Jul. 19, 1994 PCT Filed Feb. 17, 1993 PCT Pub. No. WO93/16282 PCT Pub. Date Aug. 19, 1993An injector nozzle for a fuel injected internal combustion engine having a selectively openable nozzle for the delivery of fuel to the engine combustion chamber, the nozzle comprising a port having an internal annular surface and a valve member having an external annular surface coaxial with respect to the internal annular surface of the port. The valve member being axially movable relative to the port to selectively provide an annular passage therebetween for the delivery of the fuel or sealed contact therebetween to prevent the delivery of fuel. The valve member has a coaxial projection extending beyond the extremity of the external annular surface and positioned so the fuel plume issuing from the nozzle will follow a path based on the external surface of the projection and will pass therealong that external surface to issue from the lower extremity thereof in a substantially coaxial relation to the nozzle. The projection preferably is necked down immediately adjacent the valve member and thereafter is of a converging circular shape, generally of an inverted truncated conical shape. The projection provides a surface which aids in the control of the fuel plume shape and corrects disturbances to that shape caused by deposits in or on the surface of the nozzle port or valve member.</p> |
