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US 6,663,024 B2Granted
Compact high-pressure resistant injector for fuel injection
AssigneeRobert Bosch GmbH
InventorFriedrich Boecking
Life of this patent
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Abstract
The invention relates to an injector for injecting fuel into combustion chambers of an internal combustion engine. The injector includes an injector housing, in which a control chamber is embodied that can be subjected to a control volume via an inlet throttle. The control chamber can be pressure-relieved to an actuator-actuatable control element as a result of which a control part is movable vertically in the injector housing. The control part and the nozzle needle are embodied integrally.
Claims7
An injector for injecting fuel into combustion chambers of an internal combustion engine, comprising:
- an injector housing (2) in which a control chamber (20) is embodied that can be acted upon by a control volume via an inlet throttle (21) and can be pressure-relieved via an actuator-actuatable control element, as a result of which a control part (3) is movable in the vertical direction in the injector housing (2), the control part (3) and a nozzle needle (22) being embodied integrally,
- further comprising inlet faces (26) for the delivery of fuel to a tip (32) of the nozzle needle (22) provided on the nozzle needle (22),
- still further comprising annularly extending guide faces (23,25) embodied on the nozzle needle (22), and
- still further comprising an annular hollow chamber (24) disposed between the guide faces (23, 25).
1 more element
Dependencies are inferred from the claim text.