| 摘要 |
A method of managing pressure in a fuel system supplying fuel to an internal combustion engine. The method includes providing a fuel tank including a headspace, connecting to the headspace an intake manifold of the internal combustion engine, a fuel vapor collection canister, a purge valve, and a fuel vapor pressure management apparatus, detecting the vacuum that naturally forms in the headspace, and relieving excess pressure that forms in the headspace. The fuel vapor management apparatus includes a housing defining an interior chamber, excludes a diaphragm partitioning the interior chamber, and excludes an electromechanical actuator.
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