A V2X COMMUNICATION OF FUEL TYPE CHARACTERISTICS BETWEEN GAS STATION FUEL PUMP AND VEHICLE
Publication Date: 2014-Feb-11
The IP.com Prior Art Database
Page 01 of 1
A V2X COMMUNICATION OF FUEL TYPE CHARACTERISTICS
BETWEEN GAS STATION FUEL PUMP AND VEHICLE
Fuel characteristics (octane level, % ethanol, RVP) are a major unknown factor in most vehicles. Many powertrain control features (spark, fueling, knock) need knowledge of the fuel type in order to function properly. OBDII diagnostics (misfire, Evap) also need fuel type knowledge. The Evap leak monitor needs to know the fuel RVP (summer vs. winter fuel) in order to adjust pass/fail thresholds accordingly. Misfire needs knowledge of % ethanol and octane type. Current PCM strategy attempts to infer some fuel characteristics such as % ethanol. PCM strategy inference is lagging and utilizes combustion event feedback (O2) sensors. However, this inference can have errors in it and only works in a combusting engine. In HEV, the inference may not be available at times due to battery run mode. Also, fuel types differ from state to state, season to season, station to station. Ultimately, gas station itself is the best source of information on the fuel type and characteristics.
We leverage built-in wireless modems in the vehicle to gain fuel type knowledge. The gas station monitors its fuel type characteristics (% ethanol, RVP, octane level, …) The gas station has a smart gas station dispensing pump to wirelessly communicate the fuel type and flow to the vehicle's PCM during refueling. The fuel type characteristics are obtained and stored in the PCM. The PCM then calculates...