Drain pipe of canister

Details Drain pipe of canister Drain pipe of canister

1998-03-03

1999-11-23

Moulis, Thomas N.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

F02M 3304

Patent

active

059881453

ABSTRACT:
Blockage of a drain pipe of a canister due to freezing or clogging with mud is prevented with a simple structure comprised of a small number of parts. A drain pipe, mounted to a canister body having an adsorbent accommodated therein, includes an inner shell which extends downwards from the canister body and opens at its lower end, and an outer shell which opens at its upper and lower ends. The lower end of the inner shell is inserted into the opening in the upper end of the outer shell with a gap left therebetween. Even if the opening in the lower end of the outer shell is blocked due to freezing or clogging with mud, surplus fuel or the exterior air can flow from the canister body via the opening in the upper end of the outer shell. If the opening in the lower end of the outer shell is submerged in water when evaporated fuel is purged into intake system, the drawing of water into the canister body can be prevented, because the opening in the upper end of the outer shell opens into the atmosphere.

REFERENCES:
patent: 5427076 (1995-06-01), Kobayashi et al.
patent: 5727530 (1998-03-01), Honda et al.
patent: 5855198 (1999-01-01), Nakajima et al.

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