Poppet for an integrated pressure management apparatus and fuel system and method of minimizing resonance

A fuel system for supplying fuel to an internal combustion engine, the fuel system comprising:

• a fuel tank having a headspace;
• a fuel vapor collection canister having first and second sides, the first side being in fluid communication with the headspace;
• an intake manifold of the internal combustion engine;
• a purge valve including an inlet and an outlet, the inlet being in fluid communication with the first side of the fuel vapor collection canister and the outlet being in fluid communication with the intake manifold;
• and
• a fuel vapor pressure management apparatus including first and second ports, the first port being in fluid communication with the second side of the fuel vapor collection canister, and the second port being in fluid communication with atmosphere, a first arrangement of the fuel vapor pressure management apparatus occurs when there is a first negative pressure level in the fuel vapor collection canister relative to atmosphere, a second arrangement of the fuel vapor pressure management apparatus permits a first fluid flow from atmosphere to the fuel vapor collection canister when there is a second negative pressure level less than the first negative pressure level, and a third arrangement of the fuel vapor pressure management apparatus permits a second fluid flow from the fuel vapor collection canister to atmosphere when there is a positive pressure in the fuel vapor collection canister relative to atmosphere, the fuel vapor pressure management apparatus including:
• a housing defining a fluid communication passage extending between the first and second ports, the housing including a first portion extending along an axis, the first portion having a first surface parallel to the axis;
• and
• a poppet being movable between first and second configurations, the first configuration preventing fluid communication between the first and second ports in the first arrangement, and the second configuration permitting fluid communication between the first and second ports in the second and third arrangements, the poppet including:
• a second portion being translatable along the axis relative to the housing, the second portion including a tubular stem having a second surface parallel to the axis, the second portion nesting with the first portion so as to define a gap between the first and second surfaces;
• and
• a head fixed to the tubular stem, the head contiguously engaging the housing so as to occlude the fluid communication passage in the first arrangement.

A method of using naturally forming vacuum to evaluate a fuel system supplying fuel to an internal combustion engine including an intake manifold, the fuel system including a fuel tank having a headspace, and a fuel vapor collection canister having first and second sides, the first side of the fuel vapor collection canister being in fluid communication with the headspace and with a purge valve, the method comprising:

• coupling a fuel vapor pressure management apparatus in fluid communication between the second side of fuel vapor collection canister and atmosphere, the fuel vapor management apparatus including:
• a housing defining a fluid communication passage extending between first and second fluid ports;
• and
• a poppet being movable between first and second configurations with respect to the housing, the first configuration preventing fluid communication between the first and second ports, and the second configuration permitting fluid communication between the first and second ports;
• damping resonance of the poppet in the second configuration.