Fuel injector with anti-scale ceramic coating for direct injection
AssigneeMagneti Marelli France
InventorMichaël Pontoppidan
Life of this patent
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Abstract
The injector comprises a tip having at least one outlet orifice (7) for fuel delivered to an engine combustion chamber. A ceramic coating (14) is deposited on the external face of the tip, preferably in a kink (12) bounding a recess in this external face, at least around and immediately downstream of the outlet orifice (7) relative to the direction in which the fuel is delivered. This invention is applicable to fuel injectors with a ceramic coating to protect against deposits of carbon oil for use with spark-ignition and direct injection internal combustion engines.
Claims8
A fuel injector for a direct-injection internal combustion engine, the fuel injector comprising:
- a tip having at least one outlet orifice from which gasoline enters an engine combustion chamber when the injector is in an open position and gasoline is delivered to the outlet orifice, a movable throttle being moved back from a seat by actuating means against return means, which return the throttle to its seat and retain it against said seat when the injector is in a closed position, and immediately downstream of and around said outlet orifice relative to the direction in which the gasoline is delivered, the external face of the tip has at least one kink bounding a recess in the external face of the tip and in that a coating of ceramic is deposited at least in said recess.
Dependencies are inferred from the claim text.