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(11) | EP 0 042 799 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Electromagnetic fuel injector |
(57) An electromagnetic fuel injector having an energizable stator means (10) for controlling
the movement of a valve member of a valve assembly (10) to open and close the injector
and thereby meter fuel, said valve assembly comprising a valve housing (30, 32) including
a valve housing bore (92) terminating with a valve seat (56) which is connected to
an exit orifice, a valve assembly (60) including a valve (60) reciprocally located
in said valve housing bore, operable to close said exit orifice by sealing said valve
seat (56) with a ball valve (60), a swirl chamber (43) for imparting to the fuel flow
exhausted from the exit orifice a swirl component that is tangential with respect
to the spray axis of the injector, and means (40) for supplying fuel from a pressurized
source to said swirl chamber, characterized in that said fuel supply means includes
means (70) forming a hollow cylinder (42) of fuel between said source and said swirl
chamber, and at least one orifice (52) communicating fuel between said fuel cylinder
forming means (70) and said swirl chamber (43). |