Onboard vapor recovery detection using pressure sensing means

Details Onboard vapor recovery detection using pressure sensing means Onboard vapor recovery detection using pressure sensing means

1998-02-11

1999-11-30

Miller, Carl S.

Internal-combustion engines

Charge forming device

Fuel flow regulation between the pump and the charge-forming...

141 94, F02M 3704, B65B 130

Patent

active

059923954

ABSTRACT:
An apparatus for detecting a vehicle having a vapor recovery system having a fuel dispenser configured to deliver fuel to a fuel tank of a vehicle, a vapor recovery system operatively associated with the fuel dispenser having a vapor path for removing fuel vapor expelled from the fuel tank of the vehicle during a fueling operation, and a hydrocarbon vapor sensor associated with the vapor path for sensing the fuel vapors in the vapor path, wherein when the vapor sensor does not sense fuel vapor during the fueling operation, the fuel dispenser determines the vehicle contains an onboard vapor recovery system. Once a vehicle having an onboard vapor recovery system is detected, the vapor recovery system is either shut off or adjusted during the fueling operation to minimize fugitive emissions.

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CARB Mail Out #94-08 Workshop Notice Feb. 9, 1994.
CARB Mail Out #94-23 May 27 1994.
CARB Workshop--Vapor Recovery Procedures, Oct. 6, 1997.
ORV/Stage II Compatability: Keeping Onboard and Vac-Assist Systems From Pulling in Opposite Directions; Undated, believed to be Jul., 1997.
CEPA Air Resources Board; Vapor Recovery Test Procedure, Oct. 6, 1997.
Gilbarco literature; VaporVac Vacuum assist Vapor Recovery, Undated.
Chrysler Corporation; Integrated Refueling/Evaporative Emissions Control System, Undated.

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