A device that measures fluid level in fuel storage tanks of mining trucks resistant to rapid filling includes an externally mounted sensor, a protective metallic tube, an anchorage system, and a pressure dissipator; and a remote monitor system that controls fluid level in fuel storage tanks of mining trucks includes a device that measures fluid level in fuel storage tanks of mining trucks including an externally mounted sensor, a protective metallic tube, an anchorage system and pressure dissipator, antennas, a Web server, remote means, and a power source.

A control method comprises: receiving from a first vehicle, first information including a first required amount of the energy source; receiving from a second vehicle, second information including a second required amount of the energy source; and determining, when a total sum of required amounts of the energy source received from two or more vehicles including the first vehicle and the second vehicle is larger than a remaining amount in a storage reservoir, i) a first reserved supply amount of the energy source for the first vehicle, wherein the first reserved supply amount is smaller than the first required amount, and ii) a second reserved supply amount of the energy source for the second vehicle. The second reserved supply amount is determined within a range where a total sum of the first reserved supply amount and the second reserved supply amount does not exceed the remaining amount.

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 method for checking a measurement of pressure in a fuel tank, implemented in a vehicle having a fuel tank and a fuel vapor breather circuit including: a filter, a tank isolation valve interposed between the tank and the filter, and a purge line, connected to the filter, downstream thereof, a pressure sensor, and a purge valve. The method includes, when the purge valve is closed: measuring a value of the pressure in the tank when the isolation valve is closed, then measuring a temporal extreme value for the pressure in the purge line following an opening of the isolation valve, and determining, from the measured values, that there is an anomaly in the measured pressure in the tank.

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.

A computer for a vehicle is programmed to receive fuel level data over a period of time during a refueling operation. Based on the fuel level data, the computer determines that fuel flow rate during one portion of the refueling operation is materially reduced relative to other portions of the refueling operation. The computer is programmed to output a failure mode based on the determination.

Methods and systems are provided for conducting a fuel tank diagnostic. In one example, a method comprises sealing a fuel tank of a vehicle, retrieving data related to fuel tank pressure from a crowd of vehicles, and indicating the fuel tank of the vehicle being diagnosed is degraded responsive to data related to fuel tank pressure from the crowd insufficiently correlating with a set of data related to fuel tank pressure from the vehicle. In this way, fuel tank degradation may be indicated without coupling the fuel tank of the vehicle to atmosphere, which may reduce a release of undesired evaporative emissions to atmosphere.

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.

An electronic liquid level gauge assembly includes an electronic display located in a housing connected to a tank. The display has first and second display portions for indicating liquid level condition. A first electronic sensor senses a change in magnetic field of a magnet associated with a liquid level transducer, with magnet rotation being proportional liquid level change. A processor determines a temperature-compensated liquid level condition by correlating the liquid level signal with temperature measurement of the liquid. A temperature-compensated vapor space can also be calculated based on tank information and properties of the liquid. Signals related to the temperature-compensated liquid level and vapor space are sent to the display and wirelessly transmitted to a smart phone or the like for remotely viewing the tank information. The smart phone also includes a special app for sending information, firmware updates, and display configuration data to the electronic gauge assembly.

In a fuel supply device for separating raw fuel into high-octane fuel and low-octane fuel and supplying the fuel, to arrange the structural components compactly and to facilitate sealing against fuel vapor, the fuel supply device (1) includes: a raw fuel tank (2) for storing raw fuel; a separator (6) provided inside the raw fuel tank to separate the raw fuel into high-octane fuel that contains a greater amount of components with high octane numbers than the raw fuel and low-octane fuel that contains a greater amount of components with low octane numbers than the raw fuel; and a high-octane fuel tank (5) provided inside the raw fuel tank to store the high-octane fuel separated from the raw fuel by the separator.