Poppet for a fuel vapor pressure management apparatus
First Claim
1. A device for a fuel vapor pressure management apparatus of a fuel system supplying fuel to an internal combustion engine, the fuel vapor pressure management apparatus performing leak detection on a headspace of the fuel system, performing excess negative pressure relief of the headspace, and performing excess positive pressure relief of the headspace, the device comprising:
- a housing defining an interior chamber; and
a poppet movable along an axis, the poppet includes a perimeter having a plurality of notches, interposed between each adjacent pair of the notches is a corresponding tab, and each tab includes a radially outer edge adapted to cooperate with the housing so as to guide movement of the poppet associated with the performing excess positive pressure relief.
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Accused Products
Abstract
A device for 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 device includes a housing defining an interior chamber, and a poppet movable along an axis. The poppet includes a perimeter that has a plurality of notches. Interposed between each adjacent pair of the notches is a corresponding tab, and each tab includes a radially outer edge that is adapted to cooperate with the housing so as to guide movement of the poppet that is associated with the performing excess positive pressure relief.
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Citations
12 Claims
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1. A device for a fuel vapor pressure management apparatus of a fuel system supplying fuel to an internal combustion engine, the fuel vapor pressure management apparatus performing leak detection on a headspace of the fuel system, performing excess negative pressure relief of the headspace, and performing excess positive pressure relief of the headspace, the device comprising:
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a housing defining an interior chamber; and
a poppet movable along an axis, the poppet includes a perimeter having a plurality of notches, interposed between each adjacent pair of the notches is a corresponding tab, and each tab includes a radially outer edge adapted to cooperate with the housing so as to guide movement of the poppet associated with the performing excess positive pressure relief.
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2. A device for a fuel vapor pressure management apparatus of a fuel system supplying fuel to an internal combustion engine, the fuel vapor pressure management apparatus performing leak detection on a headspace of the fuel system, performing excess negative pressure relief of the headspace, and performing excess positive pressure relief of the headspace, the device comprising:
a poppet movable along an axis between a first position, a second position, and an intermediate position between the first and second positions, the poppet is adapted to cooperatively engage a seal such that;
a first arrangement includes the poppet in the second position and the seal in a substantially symmetrically deformed configuration, the first arrangement being associated with the performing leak detection;
a second arrangement includes the poppet in the second position and the seal in a generally asymmetrically deformed configuration, the second arrangement being associated with the performing excess negative pressure relief;
a third arrangement includes the poppet in the first position and the seal in an undeformed configuration, the third arrangement being associated with the performing excess positive pressure relief; and
a fourth arrangement includes the poppet in the intermediate position and the seal in the substantially symmetrically deformed configuration, the fourth arrangement substantially preventing fluid flow through the seal. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
Specification