A fuel supply device includes a flange unit and a pump unit. The flange unit includes a flange main body for closing an opening formed in an upper wall of a fuel tank. The pump unit includes a joint member that is connected to the flange main body so that both components may be movable relative to each other in the vertical direction. The interval in the vertical direction between the flange main body and the joint member is restricted from going below a minimum vertical interval. The minimum interval occurs when a stand-off portion provided as part of the flange main body and a connecting plate portion provided as part of the joint member come into mutual contact with each other and abut each other in the vertical direction.

A retaining ring for securing a pump to a tank. The ring has a circular body with an outer dimension selected to surround a pump opening in the fuel tank. An interior opening has a diameter that is selected to contact a portion of a pump housing that is placed in the tank. The retaining ring is fastened or attached directly to the tank.

A dual reservoir fuel tank, wherein the fuel tank comprises a main fuel reservoir having an inner wall and an outer wall that define a main reservoir chamber, and an auxiliary fuel reservoir connected to a bottom of the main fuel reservoir. The dual reservoir fuel tank additionally includes a fuel retention lip structured and operable to retain fuel within the auxiliary reservoir chamber when the dual reservoir fuel tank is disposed at an angle.

A fuel system for a vehicle comprising a fuel tank having a fuel tank reservoir. A lift pump is outside of the fuel tank and includes an inlet, and first and second outlets, with the inlet being configured to receive fuel from the fuel tank. The lift pump is configured to output fluid from the first outlet at a first prescribed pressure. A venturi pump is located within the fuel reservoir and defines a venturi pump reservoir. The venturi pump includes a venturi jet including a drive inlet configured to be fluidly connectable to the first outlet of the lift pump to receive fluid therefrom. A suction inlet is configured to be placeable in fluid communication with the fuel tank reservoir and to draw fluid from the fuel tank reservoir into the venturi pump reservoir in response to fluid flowing through the venturi jet at the first prescribed pressure.

A blow molded thermoplastic fuel tank with built-in fuel system components inside of the tank on separate and spaced apart internal brackets reduces the detrimental effects of thermoplastic swell to ensure fuel volume capacity is maximized, and appropriate clearances with the fuel tank wall are maintained. An internal configuration with separate spaced apart brackets provides more design freedom in the shape and configuration of the tank while enabling the tank shape to be thinner overall and fit within tighter spaces. The separate brackets also act as baffles to prevent sloshing noises of liquid fuel in the tank.

A vehicle fuel tank structure capable of suppressing transmission of a vibration of a fuel pump to a vehicle body without depending on a rubber mount includes a fuel tank provided below floor panels; a fuel pump which is provided inside the fuel tank and which is fixed by being pressed against a tank bottom surface of the fuel tank; and a reinforcement member fixed to a vehicle-exterior side of the tank bottom surface against which the fuel pump is pressed, in which the reinforcement member includes a first fixation portion which is fixed to the fuel tank at a position overlapping with a section against which the fuel pump is pressed in a plan view; and second fixation portions which are fixed to the fuel tank at positions not overlapping with the section against which the fuel pump is pressed in a plan view.

A motor vehicle tank that includes a tank container formed by a tank wall, and a holding element to fasten a component to the tank wall at an interior of the tank container. The holding element has at least one attachment point for fastening the holding element to the tank wall, at least one fastening element for fastening the component to the holding element, and a plurality of spring elements arranged between the at least one attachment point and the fastening element to facilitate fastening of the component to the tank wall in a spring-elastically decoupled manner.

A method for predicating a service life of a fuel filter includes causing a fuel pump of a fuel system to direct fuel through a fuel filter of a fuel system. The method also includes receiving work cycle data from machines that implement a same or similar fuel system. The method further includes receiving, via sensors of the fuel system, fuel system data and determining, from the fuel system data, a pressure difference across the fuel filter. The method further includes determining, based on the work cycle data, predicted load cycle data for the fuel system and determining, via a filter life model, a filter service interval representing an amount of time the fuel filter is operable in the fuel system prior to the pressure difference reaching a predetermined value.

A vehicle fuel pump assembly includes a fuel pump received in a tank opening, an annular pump mounting ring securing the pump to the tank at the opening, and a cover assembly including an annular cover ring and a cover. The cover ring is removably attached onto the underlying pump mounting ring and the cover is removably attached onto the cover ring to overly at least part of the fuel pump. The cover system can include a flexible attachment element on the cover ring engaging a peripheral notch in the pump mounting ring and clip elements securing the cover to the cover ring. The cover can include a hinge to provide pivoting of the cover or a portion of the cover with respect to the cover ring.

Methods and systems are provided for diagnosing leaks/degradation in a fuel system. In one example, a system for a vehicle may comprise a variable volume device disposed within a fuel tank; an atmospheric port of the variable volume device fluidly coupled to a vent line upstream of a hydrocarbon sensor housed in the vent line, the vent line coupling a fuel vapor canister to atmosphere; and a controller storing instructions for monitoring output of the hydrocarbon sensor; and generating an indication of a degradation in the variable volume device based on the monitored hydrocarbon sensor. In this way, it is possible to effectively detect a degradation/leak in the variable volume device with minimal specialized components in the fuel system.