Methods and systems are provided for diagnosing functionality of a vehicle fuel system and a vehicle evaporative emissions system, and one or more components thereof, subsequent to refueling a vehicle fuel tank, and wherein the refueling event may comprise a remote refueling event. In one example, after completion of the refueling event, the fuel system and evaporative emissions system are sealed from atmosphere and from each other, and pressure is monitored in both the fuel system and evaporative emissions system in order to indicate the presence or absence of undesired evaporative emissions in both the fuel system and evaporative emissions system, and to indicate whether the fuel system is effectively sealed from the evaporative emissions system. In this way, costs associated with vehicle repair may be decreased, and undesired evaporative emissions to the atmosphere may be reduced.

Methods and systems are provided for diagnosing functionality of a vehicle fuel system and a vehicle evaporative emissions system, and one or more components thereof, subsequent to refueling a vehicle fuel tank, and wherein the refueling event may comprise a remote refueling event. In one example, after completion of the refueling event, the fuel system and evaporative emissions system are sealed from atmosphere and from each other, and pressure is monitored in both the fuel system and evaporative emissions system in order to indicate the presence or absence of undesired evaporative emissions in both the fuel system and evaporative emissions system, and to indicate whether the fuel system is effectively sealed from the evaporative emissions system. In this way, costs associated with vehicle repair may be decreased, and undesired evaporative emissions to the atmosphere may be reduced.

Methods and systems are provided for estimating fuel levels in a fuel tank. In one example, a method may comprise adjusting estimates of a fuel level in a fuel tank based on an amount of fuel added to the fuel tank during a refueling event. The amount of fuel added to the fuel tank may be provided by a vehicle operator via one or more of a dashboard user interface, a wireless device user interface, and a digital camera included within a user device.

A method of monitoring a vehicle includes monitoring a precollision fuel level, detecting a collision event, and detecting a vehicle orientation based at least on the precollision fuel level and a postcollision fuel level. The method can be executed by a controller having a processor and a memory storing processor-executable instructions where the processor is programmed to monitor the precollision fuel level, detect the collision event, and detect the vehicle orientation based on at least a precollision fuel level and a postcollision fuel level.

In a method and a corresponding system for identifying a fuel loss event, periodic measurements of a measured volume of fuel stored in a fuel tank (mobile or stationary) are received, and a measurement of a dispensed volume of fuel dispensed into the fuel tank is received from a fueling station. A total volume of fuel is determined equal to the sum of the dispensed volume of fuel and the measured volume of fuel last measured prior to receiving from a fueling station. A difference is determined between the total volume and the measured volume of fuel first measured subsequent to determining the total volume. If the difference exceeds a predetermined threshold indicating a fuel loss event, an alert is generated indicating that there is a fuel loss event.

Methods and systems are provided for conducting a fuel tank pressure transducer rationality test diagnostic procedure in vehicles with sealed fuel tanks. In one example, vehicle-to-vehicle (V2V) or vehicle-to-infrastructure-to-vehicle (V2I2V) technology may be utilized to obtain fuel tank pressure transducer data from a select crowd of vehicles, where the select crowd may be based on the vehicles in the select crowd experiencing similar ambient temperature and weather as the vehicle being diagnosed. In this way, FTPT data from vehicles in the select crowd may be compared to FTPT data in the vehicle being diagnosed, in order to indicate whether the FTPT in the vehicle being diagnosed is functioning as desired, where such a diagnostic can be performed without unsealing the fuel tank on either the vehicle being diagnosed or the vehicles in the select crowd, and which may thus reduce undesired evaporative emissions.

A thief hatch state monitoring system includes a thief hatch sensor that detects a change in angular position of a thief hatch and generates sensor data at an output in response to the detected change. A processor having an electrical input is electrically connected to the output of the thief hatch state sensor. The processor determines when the angular position of the thief hatch changes by more than a predetermined amount from the sensor data and then generates a transmit signal indicating a state of the thief hatch. A network interface is electrically connected to an output of the processor. The network interface generates a signal that indicates the state of the thief hatch. A communication gateway includes a receiver that receives the signal indicating the state of the thief hatch. The communication gateway is electrically connected to a network that provides an end-user remote access to the state of the thief hatch.

The present disclosure provides a system for detection of one or more fuel pilferage events in one or more vehicles. The fuel pilferage detection system includes a first step of receiving a first set of data. In addition, the fuel pilferage detection system includes another step of collecting a second set of data. Further, the fuel pilferage detection system includes yet another step of analyzing the first set of data and the second set of data. The fuel pilferage detection system includes yet another step of categorizing the one or more vehicles in the plurality of categories based on the analyzing of first set of data and the second set of data. The fuel pilferage detection system includes yet another step of identifying the one or more fuel pilferage events in the one or more vehicles based on the analyzing of first and second set of data.

Methods and systems are provided for conducting a fuel tank pressure transducer rationality test diagnostic procedure in vehicles with sealed fuel tanks. In one example, vehicle-to-vehicle (V2V) or vehicle-to-infrastructure-to-vehicle (V2I2V) technology may be utilized to obtain fuel tank pressure transducer data from a select crowd of vehicles, where the select crowd may be based on the vehicles in the select crowd experiencing similar ambient temperature and weather as the vehicle being diagnosed. In this way, FTPT data from vehicles in the select crowd may be compared to FTPT data in the vehicle being diagnosed, in order to indicate whether the FTPT in the vehicle being diagnosed is functioning as desired, where such a diagnostic can be performed without unsealing the fuel tank on either the vehicle being diagnosed or the vehicles in the select crowd, and which may thus reduce undesired evaporative emissions.

Methods and systems are provided for conducting remote refueling events of a passenger vehicle, and for coordinating said remote refueling events with a fuel tank fill level prior to the remote refueling event, a loading state of a fuel vapor storage device, and current and predicted fuel tank pressure. In one example, an amount of fuel that can be added to the fuel tank without overwhelming a capacity of the fuel vapor storage device is increased responsive to scheduling the remote refueling event to take place at a time when the fuel tank is at a negative pressure, thus resulting in partial purge of the fuel vapor storage device prior to commencing refueling. In this way, environmentally friendly refueling events may be enabled, thus reducing the potential for undesired evaporative emissions during refueling events.