A fluid delivery module includes a housing with a housing interior volume, the housing defining a first brush compartment and a second brush compartment within the housing interior volume; an inlet which introduces fluid into the housing interior volume; an outlet which discharges fluid from the housing interior volume; a fluid pump within the housing interior volume and having a pump section and a motor assembly which receives electric power through a first carbon brush and a second carbon brush such that the first carbon brush is received within a first carbon brush holder of the motor assembly and the second carbon brush is received within a second carbon brush holder of the motor assembly; and a filter within the housing interior volume which circumferentially surrounds the fluid pump. The first brush compartment encloses the first carbon brush holder and the second brush compartment encloses the second carbon brush holder.

A fuel supply system for a vehicle having an internal combustion engine and a fuel tank, has a reservoir, a fuel pump, a suction filter, a fuel transfer and a pressure accumulator. The reservoir is located in the fuel tank and is hermetically sealed. The fuel pump is configured to suck fuel from the reservoir and to supply the fuel to the internal combustion engine. The suction filter is configured to filter the fuel sucked by the fuel pump. The fuel transfer is configured to transfer the fuel from the fuel tank into the reservoir and to pressurize the fuel in the reservoir. The pressure accumulator is connected to the reservoir in order to control a pressure of the fuel in the reservoir.

A fuel filter for a fuel supply system of an internal combustion engine may include a filter housing, which may have an untreated-side inlet, a treated-side outlet, and an untreated-side return line. The fuel filter may also include a filter element arranged in the filter housing, and a closure element, which in an operationally ready state of the fuel filter may close off the return line. The fuel filter may include an untreated space and a treated space, and may separate in the filter housing the untreated space communicating with an inlet and the return line from the treated space communicating with the outlet. The fuel filter may further include a pressure sensor configured to measure a pressure build-up in the treated space, wherein the fuel filter may be configured to enable the pressure build-up to reach a predetermined threshold at which the engine may be started.

A sensor device 1 includes a fuel passage through which fuel ejected from a fuel pump 4 in a fuel tank 2 flows; and detection electrodes 61 configured to make contact with fuel flowing through the fuel passage to detect a concentration of alcohol contained in the fuel (a first property of the fuel), and a throttle 25 configured to resist a flow of the fuel on a downstream side of the detection electrodes 61 is provided in the fuel passage.