An in-tank fuel pump assembly and mounting system is disclosed which may be configured for mounting inside a fuel tank. The assembly includes a pump housing, pump mounted to the housing, and pressure relief valve. The housing may comprise upper and lower pump housing units coupled together. The upper housing unit is configured for mounting to a tank opening, which in one implementation may be the fuel fill opening. The lower housing unit extends into the tank to approximately the bottom of the tank. A fuel fill fluid pathway is created through the housing for adding fuel to the tank while the pump assembly remains in situ. The upper housing unit may include a removable fuel cap. The pump housing may include an integral vapor trap.

Methods and systems are provided for a fuel system of a hybrid vehicle. In one example, a system may include a fuel tank selectively fluidly coupled to a fuel vapor canister via a first conduit that includes a fuel tank isolation valve and via a second conduit that includes a tank pressure control valve and a pump. In one example, the pump is a vacuum pump.

An emergency operation method for actuating a fuel pump after a first temperature threshold for an actuation electronics system of the fuel pump has been exceeded including reducing a power consumption of an electric motor that drives a pump stage by the actuation electronics system by reducing a rotational speed until a monitored temperature value falls below a second temperature threshold below the first temperature threshold. Emergency operation method is initiated after the first temperature threshold is exceeded by a fault signal output by the actuation electronics system to an engine control unit is communicatively connected to the actuation electronics system. The fault signal, as long as it is output, is used to suppress a specification for the rotational speed of the electric motor on the part of the engine control unit and instead to specify the rotational speed by way of the actuation electronics system.

Estimating a fuel consumption includes receiving a request for estimating the fuel consumption between a first time and a second time; estimating a first fuel consumption value in a first time interval using fuel-sender resistance data; estimating a second fuel consumption value in a second time interval using fuel-injected mass data, where the first time interval and the second time interval are consecutive, non-overlapping intervals; and combining at least the first fuel consumption value and the second fuel consumption value to obtain a fuel consumption value.

Vehicle fuel volume estimation systems and methods are provided herein. An example method includes determining a fuel level percentage value for a vehicle, determining a vehicle identification number (VIN) of the vehicle, determining a fuel tank part number using the VIN, converting the fuel level percentage value into a fuel volume value based on the fuel tank part number, and transmitting a message to a recipient, the message that includes the fuel volume value.

An apparatus for controlling an engine start during refueling of a hybrid vehicle includes a controller configured to: stop an engine to block the engine start by sensing whether the vehicle enters into a refueling state in accordance with a fuel injection port open or closed state, a vehicle speed, and brake pedal state (BPS) information, and start the engine to release blocking of the engine start in accordance with a switchover to a hybrid electric vehicle (HEV) mode by sensing whether the refueling state has been released in accordance with the fuel injection port open or closed state, the vehicle speed, and acceleration pedal state APS) information.

A refueling control system for an internal combustion engine includes a fuel tank; a vapor pipe; a step motor-driven shut-off valve; a fuel filler lid; and an electronic control unit configured to, when the fuel filler lid is to be opened, i) drive the shut-off valve such that the shut-off valve is opened, ii) close the fuel filler lid when an opening degree of the shut-off valve is less than a set opening degree, and iii) open the fuel filler lid when the opening degree of the shut-off valve is greater than or equal to the set opening degree. The electronic control unit sets the set opening degree such that the set opening degree when an opening speed of the shut-off valve is low is greater than the set opening degree when the opening speed of the shut-off valve is high.

A universal fuel-supply assembly is adaptable during manufacturing to be made for use with one of multiple different fuel types (e.g., gasoline or diesel fuel). A method for assembling a fuel-supply assembly includes providing a plate structure configured to be secured to a fuel tank. The plate structure has multiple bosses. According to one example, the method determines whether the fuel-supply assembly is for use as a diesel fuel-supply assembly or as a gasoline fuel-supply assembly. The method provides an opening through one of two different bosses that communicates with both the top side and the bottom side of the plate structure depending on whether the fuel-supply assembly is for use as a diesel fuel-supply assembly or a gasoline fuel-supply assembly.

Vehicle fuel volume estimation systems and methods are provided herein. An example method includes determining a fuel level percentage value for a vehicle, determining a vehicle identification number (VIN) of the vehicle, determining a fuel tank part number using the VIN, converting the fuel level percentage value into a fuel volume value based on the fuel tank part number, and transmitting a message to a recipient, the message that includes the fuel volume value.

When a closing valve is in a closed state, a controller may determine presence of leakage from the closing valve based on: a pressure detected by a first pressure sensor and/or a pressure detected by a second pressure sensor detected when a difference between a pressure in the vapor passage upstream of the closing valve and a pressure in the vapor passage downstream of the closing valve is a first difference; and the pressure detected by the first pressure sensor and/or the pressure detected by the second pressure sensor detected when the difference is a second difference different from the first difference.