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US 7,093,584 B1Granted
Fuel injector noise mufflers
AssigneeDelphi Technologies, Inc.
InventorsDuane E. Potter, Charles W. Braun
Life of this patent
Estimating the term…
Abstract
Several embodiments of noise reduction apparatus for a fuel injector are disclosed and include perforated tubes, side branch filters and expansion chambers strategically located between a respective injector and the fuel rail to target and reduce high frequency noise generated by the mechanical movement of the fuel injector.
Claims2
A fuel injector system for an internal combustion engine comprising
- a fuel rail for delivering fuel to said internal combustion engine;
- a socket attached to the fuel rail and defining a fuel flow path receiving the fuel from the fuel rail;
- a fuel injector inserted into the socket and adapted to receive fuel from the fuel flow path through the socket;
- a side branch filter extending from said socket perpendicular to the fuel flow path and comprising an elongated passage defining a constant volume, said side branch filter having a closed end adapted to reflect pressure waves propagating within the passage from the fluid flow path and having a length effective to cancel the pressure waves.
1 more element
A fuel injector system for an internal combustion engine comprising
- a fuel rail for conveying fuel to said internal combustion engine;
- a socket attached to the fuel rail;
- a fuel injector inserted into the socket and adapted to receive fuel from the fuel flow path through the socket;
- a perforated tube having first and second ends, said first end being open and disposed within the socket, said second end being closed and extending into said fuel rail.
1 more element
Dependencies are inferred from the claim text.