Patent ID: 7849728
Filing Date: 2010-12-14
Classification: B67D,F02M,G01M

Abstract:
1. A method of monitoring a vapor recovery system that recovers vapors expelled from vehicles during refueling at a plurality of fuel dispensing points and returns the vapors to an underground storage tank in a service station environment, comprising: measuring amounts of fuel flow delivered to the vehicles at respective said fuel dispensing points; measuring amounts of vapor flow recovered at the respective fuel dispensing points to be returned through a vapor flow path to the underground storage tank from the respective fuel dispensing points using at least one vapor flow sensor disposed in the vapor flow path, wherein the number of the at least one vapor flow sensors is less than the number of the respective fuel dispensing points that can be active at any one time; and determining an amount of vapor flow recovered by each of the respective fuel dispensing points using a said amount of vapor flow recovered at the respective fuel dispensing point.