SYSTEMS AND METHODS FOR EVAP LEAK TESTING
Methods and systems are provided for regulating evaporative emissions from a fuel system. In one example, a method may comprise spinning an engine unfueled responsive to a hydrocarbon concentration at a fresh air end of a fuel vapor canister increasing above a first threshold. The method may compris...
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Main Authors | , , , |
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Format | Patent |
Language | English |
Published |
08.08.2019
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Subjects | |
Online Access | Get full text |
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Summary: | Methods and systems are provided for regulating evaporative emissions from a fuel system. In one example, a method may comprise spinning an engine unfueled responsive to a hydrocarbon concentration at a fresh air end of a fuel vapor canister increasing above a first threshold. The method may comprise spinning the engine to pull hydrocarbons away until a hydrocarbon concentration at a purge end of the fuel vapor canister, opposite the fresh air end, increases above a second threshold. |
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Bibliography: | Application Number: US201916386180 |