Methods and systems are provided for reducing an amount of fuel vapors that are routed to a fuel vapor storage canister during a refueling event, in response to an indication that a fuel dispenser that is dispensing fuel to a fuel tank is underperforming. In one example, a method comprises increasing a pressure in the fuel tank responsive to an indication that the fuel dispenser is dispensing fuel at a first rate that is at least a threshold amount below a second rate, without changing the first rate at which the fuel dispenser is dispensing the fuel. In this way, fuel vapor recirculation may be improved and an amount of fuel vapors routed to the canister reduced, which may thus reduce opportunities for release of undesired evaporative emissions to atmosphere.

This disclosure is directed to vehicle fuel systems capable of isolating the energy within a fuel tank from the vehicle user. An exemplary fuel system may include a first valve located within a fuel inlet conduit and a second valve located within a vapor recovery recirculation line of the fuel system. The first and second valves may be controlled based on the pressure inside a fuel tank of the fuel system. Fuel may only be transferred into the fuel tank when the fuel tank is within a predefined threshold pressure range. A depressurization sequence of the fuel tank may be automatically initiated when a fuel door of the fuel system is moved to an open position. The positioning of the fuel door may be monitored by a fuel door position monitoring device.

According to one aspect of the present invention, a method for diagnosing a failure of a flowmeter in a measuring machine, includes calculating a filling amount at an end of filling of the hydrogen gas into a tank from the measuring machine by using a pressure, a temperature, and a volume of the tank; and determining whether or not the flowmeter fails by using a plurality of error values between a metering filling amount at the end of filling measured using the flowmeter and a calculated filling amount at the end of filling calculated using the pressure, the temperature, and the volume of the tank, the plurality of error values being based on a plurality of past performance data stored in a storage device, and an error value at the end of filling of the hydrogen gas at a present time, and outputting a result.

A vehicle security system may be automatically activated when a vehicle (e.g., car or truck) is temporarily stopped. Specifically, if a car is stopped at a gas station or other type of temporary stop (e.g., where a car would not be fully closed and locked) the vehicle security system may engage (e.g., based on opening of a gas cap cover). The vehicle security system monitors for theft of contents from inside a vehicle in a temporary stopped state. Sensors monitor if a passerby reaches into an open (or partially open) window to grab a parcel, handbag, phone, etc. from inside the vehicle. In a temporary stop condition, a vehicle may not be fully locked to engage a standard anti-theft security system. If a driver's attention is diverted away from the vehicle during the temporary stopped condition a quick and quiet theft scenario (e.g., a reach and grab) may be attempted.

A device equipped with a tank, includes: the tank to be filled with a fuel gas; a valve mechanism provided in the tank; a receptacle with which a nozzle of a fuel gas filling device is connectable; a first filling path, an upstream end of the first filling path communicating with the receptacle; a second filling path, a downstream end of the second filling path communicating with the tank through the valve mechanism; and a storage container hermetically communicating between a downstream end of the first filling path and an upstream end of the second filling path, and storing foreign matter contained in the fuel gas, wherein the storage container is positioned vertically above the downstream end of the first filling path.

A fueling system for an engine includes a fuel tank, a controller, a fuel nozzle receptacle connected to the fuel tank, the fuel nozzle receptacle including a receptacle sensor configured to send a signal to the contoller indicative of whether a fuel nozzle of a fuel dispenser is received in the fuel nozzle receptacle, and an electric fill slop valve between the fuel tank and the fuel nozzle receptacle, the electric fill stop valve being, configured to be controlled to open and close in response to a signal from the controller. The controller can be configured to receive at least one of (a) a signal whether a fuel nozzle of a fuel dispenser is received in a fuel nozzle receptacle connected to the fuel tank, and (b) a signal whether a fuel level of the fuel tank is full, and to control the electric fill stop valve to close when a signal is sent to the controller that at least one of (a) the fuel nozzle is not received in the fuel nozzle receptacle when the controller is configured to receive the signal whether the fuel nozzle of a fuel dispenser is received in the fuel nozzle receptacle, and (b) the fuel level of the fuel tank is full when the controller is configured to receive the signal whether the fuel level of the fuel tank is full.

Methods and devices are disclosed for determining and displaying the current fuel level to a vehicle operation while the vehicle ignition is turned off. An example vehicle includes a fuel tank including a fuel sensor, one or more external vehicle displays, and a processor. The processor is configured to determine a current fuel level of the fuel tank, determine a cost to fill the fuel tank, and display the current fuel level and the cost to fill the fuel tank on the one or more external vehicle displays, while a vehicle ignition is turned off.

A vehicle security system may be automatically activated when a vehicle (e.g., car or truck) is temporarily stopped. Specifically, if a car is stopped at a gas station or other type of temporary stop (e.g., where a car would not be fully closed and locked) the vehicle security system may engage (e.g., based on opening of a gas cap cover). The vehicle security system monitors for theft of contents from inside a vehicle in a temporary stopped state. Sensors monitor if a passerby reaches into an open (or partially open) window to grab a parcel, handbag, phone, etc. from inside the vehicle. In a temporary stop condition, a vehicle may not be fully locked to engage a standard anti-theft security system. If a driver's attention is diverted away from the vehicle during the temporary stopped condition a quick and quiet theft scenario (e.g., a reach and grab) may be attempted.

An evaporative emissions control system includes a first vent valve configured to selectively open and close a first vent, a second vent valve configured to selectively open and close a second vent, a fuel level sensor configured to sense a fuel level in the fuel tank, a pressure sensor configured to sense a pressure in the fuel tank, an accelerometer configured to measure an acceleration of the vehicle, and a controller configured to regulate operation of the first and second vent valves to provide pressure relief for the fuel tank. The controller is programmed to determine if a refueling event is occurring based one signals indicating the fuel level is increasing, the pressure in the fuel tank is increasing, and the vehicle is not moving, and open at least one of the first and second vent valves based on determining the refueling event is occurring.

Data are received indicating an amount of pumped fuel provided to a vehicle fuel tank. A vehicle fuel tank fuel volume is received. Upon determining that a difference between the pumped amount of fuel and a detected change in a fuel volume in the fuel tank exceeds a threshold, a fuel pump is deactivated.