SYSTEMS AND METHODS FOR PURGE AIR FLOW ROUTING
First Claim
Patent Images
1. A method, comprising:
- purging fuel vapors from a fuel vapor canister and/or a fuel vapor bleed element to an engine intake with air routed through a transmission bellhousing.
1 Assignment
0 Petitions
Accused Products
Abstract
A method, comprising: purging fuel vapors from a fuel vapor canister and/or a fuel vapor bleed element to an engine intake with air routed through a transmission bellhousing. In this way, purge air may be warmed by heat generated in the transmission bellhousing during engine operation, thereby increasing desorption efficiency and reducing bleed emissions. Further, purge air may be pressurized in the transmission bellhousing to allow purging operations irrespective of intake manifold vacuum.
12 Citations
20 Claims
-
1. A method, comprising:
purging fuel vapors from a fuel vapor canister and/or a fuel vapor bleed element to an engine intake with air routed through a transmission bellhousing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
10. An engine system, comprising:
-
a fuel vapor canister coupled to a fuel tank; a fuel vapor bleed element coupled to the fuel vapor canister; a purge line coupled between an engine intake and one or more of the fuel vapor canister and fuel vapor bleed element; a vent line coupled between a transmission bellhousing and one or more of the fuel vapor canister and fuel vapor bleed element; and one or more air inlets coupled between the transmission bellhousing and atmosphere. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. A method for purging a fuel vapor canister, comprising:
-
opening a purge valve coupled between the fuel vapor canister and an engine intake; opening a vent valve coupled between the fuel vapor canister and a transmission bellhousing; flowing atmospheric air into the transmission bellhousing via an air filter; transferring heat to the atmospheric air; pressurizing the atmospheric air in the transmission bellhousing between a bellhousing wall and a ring gear; flowing the heated, pressurized atmospheric air to the fuel vapor canister to purge fuel vapor stored in the fuel vapor canister; and flowing the purged fuel vapor to the engine intake.
-
Specification