A fuel system for a machine may include a fuel tank configured to hold cryogenic fuel, a pressure sensor, and an electronic control module (ECM). The ECM may determine a change in pressure of the fuel between a first time and a second time, determine a predicted change in pressure of the fuel between the first time and the second time, and determine that the change in pressure and the predicted change in pressure is greater than a threshold. Based on the change in pressure and the predicted change in pressure being greater than the threshold, a notification may be displayed associated with an integrity of the fuel tank.

In one example in accordance with the present disclosure, a method is described. According to the method, an actual volume of fuel added to at least one fuel tank is determined. It is also determined, an amount of fuel indicated as having been added to the fuel tank from a refueling station. The actual volume added is compared to the amount of fuel indicated as having been added to determine a difference between the two values.

A tank device for a motor vehicle includes a tank container defined by a tank wall having at least one stop region, and at least one lever sensor arranged in the interior of the tank container. The at least one stop region is an end stop for the lever sensor to prevent adhesion of the lever sensor to the tank wall.

A vehicle comprising an interior; a heat source in thermal communication with the interior; a source of ultraviolet light disposed to emit the ultraviolet light into the interior; and a controller in communication with the heat source and the source of the ultraviolet light, the controller configured to cause (i) the heat source to increase a temperature of the interior, (ii) the source of the ultraviolet light to emit the ultraviolet light into the interior, or (iii) both (i) and (ii) upon receiving a command from a remote user interface. The vehicle can further include a combustion engine that combusts fuel to propel the vehicle. The vehicle can further include a battery in electrical communication with the source of the ultraviolet light and in communication with the controller, the battery having a voltage.

A tank adapter has a body with first and second ends and an axial hole. A hollow cylinder of the body has an external tapered thread from the first end toward the second end of the body. A flange between the first and second ends has a flat face extending radially outward from the hollow cylinder to a flange outer diameter. A gage mount portion has a gage mount outer diameter that is less than the flange outer diameter and extends from the second end toward the first end and has gage mounting features for securing a level gage. A gasket mates with the flat face. In a first configuration, the external tapered thread engages an internal tapered thread of a first tank opening. In a second configuration, a collar nut compresses the gasket between the flange and a top rim of a second tank opening.

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.

In one example in accordance with the present disclosure, a fuel measurement device is described. The fuel measurement device includes a collar to clamp against a neck of a fuel tank. A fuel port is coupled to the collar. The fuel port includes 1) a passage through which fuel is passed into the fuel tank and 2) a fuel level sensor that includes an elongated probe inserted into the fuel tank.

Methods and systems are provided for conducting diagnostics to indicate whether a fuel system and/or an evaporative emissions system of a vehicle has a source of undesired evaporative emissions, or not. A method comprises conducting such a diagnostic via evacuating the fuel system to a target vacuum, then sealing the fuel system from atmosphere and monitoring a pressure bleed-up in the fuel system, and dynamically adjusting a pressure bleed-up threshold responsive to one or more conditions that impact the pressure bleed-up during the diagnostic, and indicating undesired evaporative emissions responsive to the pressure bleed-up reaching the adjusted pressure bleed-up threshold. In this way, interpretation of the results of such a diagnostic may be more robust, completion rates may improve, and engine operation may be improved.

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.

Provided is an apparatus for measuring a residual amount of fuel in a fuel tank using an ultrasonic sensor that may simplify wirings, may simplify an assembly method, and may respond to contraction or expansion of the tank according to a change in temperature as compared to the conventional apparatus for measuring a residual amount of fuel in a fuel tank using an ultrasonic sensor.