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US 2014/0196694 A1Published application
Multi-path purge ejector system
AssigneeFord Global Technologies, LLC
InventorsWilliam Euliss, Kevin William Plymale
Life of this patent
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Abstract
Systems and methods for a multi-path purging ejector are disclosed. In one example approach, a dual path purge system for an engine comprises an ejector including a restriction, first and second inlets, and an outlet, at least one break-point at the restriction or inlets, and a shut-off valve coupled to the outlet.
Claims20
A multi-path purge system for an engine, comprising:
- an ejector including a restriction, first and second inlets, and an outlet hard-mounted to an intake of the engine;
- and
- at least one break-point at the orifice or inlets.
A multi-path purge system for an engine, comprising:
- an ejector including an orifice, first and second inlets, and an outlet;
- at least one break-point at the orifice or inlets, but not at the outlet;
- and
- a shut-off valve coupled to the outlet.
1 more element
A method for a vehicle, comprising:
- in response to a purge request during a boost condition:
- directing air from an engine intake downstream of a compressor through a converging orifice in an ejector and into an engine intake upstream of the compressor, wherein an outlet of the orifice is hard-mounted to the engine intake upstream of the compressor, and wherein the ejector includes an indented stress rising joint;
- drawing an amount of fuel vapor from a fuel vapor canister via a low pressure region of the ejector;
- and
- supplying the amount of fuel vapor to engine intake upstream of the compressor via the outlet hard-mounted to the engine intake upstream of the compressor;
- and
- diagnosing leaks from the ejector that are upstream of the converging orifice and the low pressure region of the ejector.
4 more elements
Dependencies are inferred from the claim text.