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A CAROUSEL SHAPE CANISTER DESIGN FOR EVAP SYSTEMS

IP.com Disclosure Number: IPCOM000236006D
Publication Date: 2014-Apr-02
Document File: 1 page(s) / 179K

Publishing Venue

The IP.com Prior Art Database

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This is the abbreviated version, containing approximately 66% of the total text.

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A CAROUSEL SHAPE CANISTER DESIGN FOR EVAP SYSTEMS

Vehicles sold in North America market are required to capture fuel vapors and store them inside a carbon canister. Vehicles are also required to perform leak checking/diagnostics on the Evap system. Engine vacuum is typically used to purge the carbon canister and recover the vapors into the intake where they are combusted in the cylinders.The CPV is typically opened and fresh air enters the canister from the fresh air line inlet. Fresh air displaces the vapors inside the canister and they are sucked into the intake manifold to be combusted inside the engine.Canister is never purged out completely since air does not flow uniformly inside it. Some regions inside the canister see better air flow than others. Those regions that do not experience good air flow typically still retain Hydrocarbon (HC) vapor. Those vapors contribute to bleed emissions when vehicle is parked over 2 or 3 days in the sun.

Method

The method aims to optimize the canister geometric design to force air to flow uniformly throughout the canister.The canister design is round and consists of x pie shaped regions separated by baffles.Fresh air enters the canister in the middle through slip ring connection. Two other connections include an engine side wiper connection for purging and a tank side wiper connection for loading the canister.Canister design includes an indexing feature such that when one section is cleaned out, the canister rotates a...