A fuel tank system is provided. In the main tank of the system, the end of a communication pipe is located above the end of a fuel introduction pipe inserted into the main tank. The end of a first pressure relief pipe at which a first cut-off valve is provided is located above the end of the communication pipe. In the auxiliary tank, the end of the communication pipe is located above the end of the fuel introduction pipe inserted into the auxiliary tank. In the auxiliary tank, the end of a second pressure relief pipe at which a second cut-off valve is provided is located above an end of a scavenging pipe.

A vehicle includes a fuel tank, a jet pump and a controller. The fuel tank has a passive side and an active side. Each of the sides includes a fuel level indicator. The jet pump is disposed within the active side and is configured to maintain a fuel level above a first threshold, based on each of the indicators, on the active side by siphoning fuel from the passive side during operation in a combustion mode. The controller is configured to, in response a battery charge level being below a second threshold during operation in an electric mode and a detected hill climb via a route guidance system, activate the jet pump to siphon fuel such that a fuel level within the active side rises above the first threshold.

Methods and systems are provided for a fuel tank mounted to a vehicle. Specifically, a saddle fuel tank comprising of a primary and secondary fuel compartment, each compartment having a module for mounting a fuel pump, fuel sensor and other accessories is disclosed. A first and second crimped opening formed on a top external wall and bottom internal wall, respectively of the saddle fuel tank may provide means for securely mounting a main and sub-side module to the fuel tank.

A system for the transfer of fluid in a vehicle includes a main tank (4), a secondary tank (5), a pump (6), a first valve arrangement (11) and a several fluid pathways (13, 15, 17). In response to a control signal, the system is placed into a first condition, in which the first valve arrangement (11) is in a first condition, in which the pump (6) transfers the fluid from the secondary tank (5) to the main tank (4) through the valve arrangement (11), or into a second condition, in which the first valve arrangement (11) is in a second condition and the fluid pathways are blown clean from fluid. Also, a method for transfer of fluid in a system intended for a vehicle is disclosed.

A fuel pump module for a fuel tank providing improved rigidity includes a first module and a second module. The first module includes a first tank having a first tank room, a direct injection (DI) fuel pump and filter, a port injection (PI) fuel pump and filter, a subtank, and a first flange supporting the filter, the pump, and the like. The second module includes a second tank having a second tank room where fuel is stored separately from the first tank room, a PI filter, a second jet pump, a second flange supporting the filter, the pump, and the like. As a result, a size of two flanges supporting two fuel pumps and two filters is reduced, thereby, reducing a size of two openings of the fuel tank.

An operating medium vessel for a vehicle is provided for storing liquid operating medium and has: a withdrawal section with a reservoir pot arranged therein; a feed section which is connected fluid-conductively to the withdrawal section and is adjacent to the withdrawal section; and an operating medium delivery system with an operating medium reservoir arranged in the feed section, and with a first delivery device and a second delivery device. The first and the second delivery devices are each fluid-conductively connected to the operating medium reservoir. The first delivery device is designed to deliver operating medium out of the feed section from outside the operating medium reservoir into the operating medium reservoir, and the second delivery device is designed to deliver operating medium from the operating medium reservoir into the reservoir pot.

An operating medium vessel for a vehicle is provided for storing liquid operating medium and has: a withdrawal section with a reservoir pot arranged therein; a feed section which is connected fluid-conductively to the withdrawal section and is adjacent to the withdrawal section; and an operating medium delivery system with an operating medium reservoir arranged in the feed section, and with a first delivery device and a second delivery device. The first and the second delivery devices are each fluid-conductively connected to the operating medium reservoir. The first delivery device is designed to deliver operating medium out of the feed section from outside the operating medium reservoir into the operating medium reservoir, and the second delivery device is designed to deliver operating medium from the operating medium reservoir into the reservoir pot.

A self-contained fueling station is paired with an external fuel tank and configured to transfer liquid fuel back-and-forth to maintain a storage pressure in the external fuel tank, increase to an operational pressure and return to the storage pressure. The fueling station is equipped with an internal fuel tank with a fuel expansion accumulator and float valve, a bi-directional pump and multiple relief valves to transfer liquid fuel and maintain the desired pressure. The external fuel tank may be a fixed volume or an expandable volume.