Evaporative emissions canister having an internal insert
AssigneeDelphi Technologies, Inc.
InventorsThomas Meiller, Alexander Shneydman
Life of this patent
Estimating the term…
Abstract
An emissions control canister including an insert having an elongate well and flange. The insert extends into a chamber such that a carbon adsorption column is a hollow cylinder around the insert. After vapors flow through the column of adsorbent, flow is directed through holes in the flange and out through an atmosphere port. The flow path through the hollow cylinder has an increased L/D ratio and improves emission performance. In a second embodiment, a cylindrical tube surrounds the exit port and extends into the insert, forcing vapor flow along a tortuous path between the cylindrical wall and the insert. In a third embodiment, a final scrubber is added inside the tube.
Claims9
A canister for selectively adsorbing and desorbing fuel vapor emissions from a fuel vapor source to prevent such fuel vapors from escaping to atmosphere, comprising:
- a) a housing including a chamber for holding fuel-vapor adsorbent material;
- b) an insert disposed in said chamber, said insert including a well portion for forming at least a portion of said adsorbent material into a hollow cylinder between said insert and a wall of said chamber.
A vehicle comprising:
- a) an internal combustion engine;
- b) a fuel tank for providing fuel to said engine;
- and
- c) a fuel emission adsorption canister connected to said fuel tank for selectively adsorbing fuel tank vapor emissions to prevent such emissions from escaping to atmosphere,
- wherein said canister includes a housing, including a chamber for holding fuel-vapor adsorbent material, and an insert disposed in said chamber, said insert including a well portion for forming at least a portion of said adsorbent material into a hollow cylinder between said insert and a wall of said chamber.
Dependencies are inferred from the claim text.