The invention relates to a quick-change device for a filling adapter for filling vehicles on assembly lines in the automotive industry, on which circuits and containers of the vehicles are filled with operating materials which, starting from a filling system, are fed into the respective circuits and containers via hose assemblies with pneumatic and hydraulic lines and a filling adapter, wherein a separate connection plate is arranged at the separation point of the hose assembly from the filling system, and wherein a connection block is designed as a functional counterpart to the connection plate on the filling system. It is the object of the invention to create such a quick-change device which enables automatic clamping of the connection plate and connection block and which is structurally integrated into one of these two assemblies. The object is achieved in that the connection block (1) comprises a continuous channel structure (6) along its central longitudinal axis, in which structure a tie rod (3) is arranged, and in that an assembly (5) with a pneumatic cylinder (7) is arranged on the connection block (1) on the end face opposite the connection plate (2), wherein the tie rod (3) is enclosed in the channel structure (6) on a section of its axial extension by a spring assembly (4) which is supported in a fixed position on the tie rod (3) at its two end face sections by means of a respective fastening element (8), wherein the pneumatic cylinder (7) comprises a piston surface with which the upper end face of the tie rod (3) can be acted upon, wherein the tie rod (3) has, at its end section opposite the pneumatic cylinder (7), a receiving geometry (11) in the form of a cylinder screw, and wherein the connection plate (2) has a receiving geometry (9) in the form of an elongated hole in such a way that the connection plate (2) can be suspended on the tie rod (3), in that this receiving geometry (9) in relation to the longitudinal axis of the tie rod (3) passes in the radial direction from a section (A) with a first open cross section in the form of the receiving geometry (11) formed as a cylinder screw on the tie rod (3) into a section (B) with a second open cross section which has a narrower contour opening than the first open cross section and an undercut, and wherein the inner installation space from the undercut has a contour in the form of the cylinder screw (11) formed on the tie rod (3).

A fuel delivery system and method for controlling a fuel delivery system includes a fuel control device including a valve and an electronic sensor assembly integrated to the fuel control device and is arranged to detect an operational positioning of the valve, to generate a record of the real-time activation of the valve, and to compare records of real-time activation against a schedule of fuel deliveries to detect unauthorized fuel access.