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DISPENSING GAS STATION FUEL PUMP FLOW RATE SYNCHRONIZATION WITH VEHICLE TO MINIMIZE SHUTOFFS

IP.com Disclosure Number: IPCOM000234534D
Publication Date: 2014-Jan-16
Document File: 1 page(s) / 240K

Publishing Venue

The IP.com Prior Art Database

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DISPENSING GAS STATION FUEL PUMP FLOW RATE SYNCHRONIZATION WITH VEHICLE TO MINIMIZE SHUTOFFS

Vehicles sold in North America contain a Evap system to trap fuel vapors. Evap system restrictions/blockages result in premature refueling shutoff events. PSO (Pre-Mature Shutoff) events contribute to company TGW metrics and consumer dissatisfaction when refueling. Customers become agitated when refueling pump keeps shutting off as they have to slowly trickle fill the fuel tank. PSOs occur when the dispensing nozzle sees a 12 InH2O back pressure at the nozzle. Pressure builds up when the Evap system becomes restricted over time. Factors that effect Evap system restriction include: Canister aging, Dust box clogging (sand, salt, spiders), contamination in lines, turns/kinks in lines, green fuel tanks. Dispensing pumps at gas stations have varying flow rates. Anywhere from 4 GPM to 12 GPM flow rate can be expected. Each vehicle has a unique restriction in its Evap system and some may not tolerate a high dispense rate. Ideally, a vehicle should have fuel dispensed into it at an optimal flow rate that eliminates PSOs and minimizes fuel fill time.

Method

Idea is to quantify a vehicle's internal Evap system restriction and from it compute a liquid fuel flow rate that will eliminate PSOs. An Evap system's restriction can be measured by flowing it using manifold vacuum and measuring the pressure drop between the CPV and CVS. Vehicle will then communicate to a smart gas station Di...