| 摘要 |
An apparatus and method for adjusting a fuel vapor pressure management apparatus of a fuel system supplying fuel to an internal combustion engine. The fuel vapor pressure management apparatus performs leak detection on a headspace of the fuel system, performs excess negative pressure relief of the headspace, and performs excess positive pressure relief of the headspace. The apparatus includes a housing defining an interior chamber, a pressure operable device, a resilient element, and an adjuster. The pressure operable device separates the interior chamber into first and second portions, and includes a poppet that is movable along an axis and a seal that is adapted to cooperatively engage the poppet. The resilient element applies a force that biases together the poppet and the seal. The adjuster is positioned between the resilient element and the housing, and is movable with respect to the housing to adjust the biasing force so as to calibrate the pressure operable device for at least one of a negative pressure level relative to atmosphere that corresponds to the performing leak detection, and a positive pressure level relative to atmosphere that corresponds to the performing excess positive pressure relief of the headspace.
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