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SLOW FUEL FILL ARBITRATION FOR PHEV VEHICLES

IP.com Disclosure Number: IPCOM000239074D
Publication Date: 2014-Oct-09
Document File: 1 page(s) / 243K

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The IP.com Prior Art Database

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SLOW FUEL FILL ARBITRATION FOR PHEV VEHICLES

Slow fuel fills and PSO (Premature Shutoff) events contribute to customer dissatisfaction when refueling. Customers become dissatisfied when the refueling pump keeps shutting off or refuels slowly.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.While the Evap system is a contributor to slow fills or PSOs, another factor could be the gas station pump itself.Customers tend to frequent the same gas stations and sometimes even the same dispensing pump at the gas station. Dispensing pumps at gas stations have varying flow rates. Anywhere from 4 GPM to 12 GPM flow rate can be expected.If slow fill or PSO occurs, customer cannot distinguish between a slow performing gas station pump or restrictions in the vehicle Evap system.

Method

This method improves identification of whether the slow fill issue is related to the vehicle Evap system or to the gas station dispensing pump. Note, that in a PHEV, the PCM is alive during refueling events, as gas tank must be vented before refueling door is unlocked. This method stores the refueling event data (FLI and FTPT) in PCM memory. The rate at which the fuel is dispensed is calculated based on tank gallon capacity and refueling duration, then stored into memory, preferably with GPS coordinates to identify the pump. If a tank starts out at 0 FLI and it takes 120 seconds to fill the...