Patent ID: 6170538
Filing Date: 2001-01-09
Classification: B60K,Y10T

Abstract:
A fuel system comprisinga fuel tank formed to include an interior region,a fuel vapor discharge apparatus coupled to the fuel tank to vent fuel vapor from the interior region of the fuel tank,a fuel delivery apparatus formed to include an interior region and coupled to the fuel tank to deliver fuel to the interior region of the fuel tank, anda fuel vapor recirculation apparatus in fluid communication with the interior region of the fuel tank to deliver fuel vapor from the interior region of the fuel tank to the interior region of the fuel delivery apparatus, the fuel vapor recirculation apparatus including a sensor in fluid communication with the interior region of the fuel delivery apparatus to sense pressure extant in the interior region of the fuel delivery apparatus, a housing, and a flow restrictor coupled to the sensor and positioned to lie in the housing to move between a first position restricting the flow of fuel vapor from the fuel tank to the fuel delivery apparatus in response to sensations from the sensor without regard to changes in the vapor pressure extant in the interior region of the fuel tank and a second position permitting flow of fuel vapor from the fuel tank to the fuel delivery apparatus.