A fuel system for an internal combustion piston engine includes a first fuel section and a second fuel section in which the first fuel section has a first inlet line connecting respective inlets of the injectors to a tank, and the second fuel section has a second inlet line connecting respective inlets of the injectors to a fuel tank. The second fuel section is arranged to inject the fuel into the combustion chambers for igniting the first fuel, in which first fuel section the inlet line extends from a high pressure pump to the respective injectors, and a fuel return line of the first fuel section extends from each of the injectors to the tank. The fuel return line has a pressure increasing means arranged to the fuel return line of the first fuel section between the injectors and the tank.

A fuel pump module includes: a pump unit; a lid provided to close an opening of a fuel tank; and a flexible fuel tube. The pump unit includes a fuel pump configured to pump fuel out of the fuel tank, a housing that holds the fuel pump, and a filter configured to filter the fuel. The lid has a discharge port to supply the fuel to outside of the fuel tank. The flexible fuel tube connects the pump unit and the discharge port. The housing includes a guide portion configured to fix the pump unit to a fixing member having a pair of rails provided in the fuel tank, and a separation regulating member configured to regulate the guide portion from separating from the pair of rails by engaging with the fixing member.

In at least some implementations, a device includes a fuel system component having a body through which fuel flows, and a retention member body connected to the body of the fuel system component, the retention member body having one or more retainers that are flexible and resilient, and that extend outwardly from the retention member body and that are arranged to engaged spaced apart portions of an interior of a fuel tank to retain the position in the fuel tank of the fuel system component.

A fuel filter assembly includes a filter housing, a center stack, a top portion, a center stack base, and a fuel filter. The fuel filter includes a filter center support having a first portion extending along a first axial length, and a second portion extending along a second axial length, the first portion having a first inner diameter that is greater than a second inner diameter of the second portion, and having a first inner contact surface at the first inner diameter, and a filter base having an opening, the opening having an opening diameter and defining a second inner contact surface. When positioned within the filter housing, the fuel filter contacts the center stack at a first axial location and at the first inner contact surface, and it contacts a center stack base of the center stack at a second axial location and at the second inner contact surface.

A communication port opens at a shifted position of a fuel passage that is positionally shifted from an inside residual pressure holding valve toward an outside residual pressure holding valve. The fuel passage includes an outside passage part through which the fuel to be discharged into an internal-combustion engine flows from the communication port toward the outside residual pressure holding valve, and an inside passage part that throttles a flow of fuel flowing from the communication port toward the inside residual pressure holding valve more than the outside passage part. When a passage cross-sectional area of the inside passage part is converted into a passage cross-sectional area of a circular pipe, D which is a passage diameter of the circular pipe, and L which is a length of the inside passage part satisfy a relational expression of L/D≧3.

A fuel booster system having a fuel inlet port, a fuel outlet port, and a fuel accumulator fluidically coupled to both ports. The fuel inlet port allows fuel to be delivered to the fuel accumulator and the fuel outlet port is in fluid communication with a combustion engine to deliver fuel from the fuel booster system to the combustion engine. A source of pressurized gas is also fluidically coupled to the fuel accumulator to deliver pressurized gas through a gas port in one end of the fuel accumulator. A piston is located within the fuel accumulator and the source of pressurized gas can be discharged into the fuel accumulator to force accumulated fuel from the fuel accumulator and to the engine when the fuel booster system determines that the engine needs more fuel.

Methods and systems are provided for protective cover. In one example, the protective cover may be configured to protect a fuel delivery module and may include a domed cap. The domed cap may resistant forces exerted on the protective cover and maintain clearance between the domed cap and enclosed electronic ports of the fuel delivery module.

For powering a vehicle, a high energy density fuel is preferred. However, for example when the high energy fuel is highly concentrated hydrogen peroxide, this fuel may be dangerous to handle; especially when the person handling the fuel is a normal consumer filling a fuel reservoir of his vehicle at a gas station. The present invention therefore provides a vehicle arranged to receive a diluted—and thus safer—fuel, and to density this fuel to a concentrated fuel in low quantities on board for direct use. To this end a fuel densifier is provided in the vehicle arranged for receiving liquid diluted fuel and arranged to provide a concentrated fuel based on the diluted fuel, the concentrated fuel having a higher energy density than the diluted fuel. A power conversion module of the vehicle is arranged to convert the concentrated fuel to kinetic energy for powering the vehicle.

Provided are a controller integrated type fuel pump module for preventing thermal deformation of a flange and a manufacturing method thereof. An embodiment of the present invention is directed to providing a controller integrated type fuel pump module for preventing thermal deformation of a flange that minimizes heat transfer from a board to the flange through a thermal insulation effect by an air gap by improving a structure in a storage part of a controller to form the air gap between the board and the flange in the controller formed integrally with a fuel pump module, and a manufacturing method thereof.

A multipoint fuel injection system comprises an injection system segment including a circumferentially extending outer support defining a fuel manifold with a plurality of manifold passages extending circumferentially therethrough. A first connector is included at a first circumferential end of the outer support and a second connector is included at a second circumferential end of the outer support opposite the first circumferential end. The first and second connectors are each configured to connect each manifold passage with a manifold passages of a respective outer support of a circumferentially adjacent injection system segment. The system includes a circumferentially extending inner support and a plurality of circumferentially spaced apart feed arms extending radially between the inner support and the outer support. A plurality of outlet openings extend in an axial direction from each feed arm for feeding respective injection nozzles.