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US 9,038,605 B2Granted
Purge valve noise attenuation system and method
AssigneeFord Global Technologies, LLC
InventorsAhsanul Karim, Abdelkrim Zouani, Kevin William Plymale, Paul Zeng
Life of this patent
Estimating the term…
Abstract
A vapor purge valve in an engine is provided. The vapor purge valve includes a purge valve inlet, a purge valve outlet, and a muffler including a housing at least partially enclosing a diffuser in fluidic communication with the purge valve inlet and the purge valve outlet.
Claims20
A vapor purge valve comprising:
- a purge valve inlet;
- a purge valve outlet;
- an actuable seal;
- and
- a muffler including a housing enclosing a diffuser except for a diffuser inlet in fluidic communication with the purge valve inlet and a diffuser outlet in fluidic communication with the purge valve outlet, the diffuser inlet axially aligned with the diffuser outlet, the actuatable seal closing the purge valve by sealing with the diffuser inlet and the housing.
2 more elements
A system, comprising:
- a vapor storage canister;
- a vapor purge valve, including a purge valve inlet in fluidic communication with the vapor storage canister and a muffler including a noise attenuation chamber in fluidic communication via holes with a diffuser passage, the diffuser passage in fluidic communication with a purge valve outlet and the purge valve inlet, the muffler having a housing enclosing the noise attenuation chamber, the purge valve further having a movable seal engaging with the housing to close the purge valve;
- and
- an intake passage in fluidic communication with the purge valve outlet.
1 more element
A method for purging fuel vapors in an engine comprising:
- flowing purge gas through a central diffuser passage of a muffler in a vapor purge valve via a seal spaced away from a muffler housing, the diffuser passage enclosed by a noise attenuation chamber except for a diffuser passage inlet and outlet, the noise attenuation chamber in fluidic communication with the diffuser passage via holes, the noise attenuation chamber fully enclosed by the muffler housing except for the holes;
- and
- flowing purge gas from the muffler to an intake conduit in the engine.
Dependencies are inferred from the claim text.