A propulsion engine housing for a motor vehicle having at least one door arranged to allow positioning in one closed and one open position. The device further includes a floating junction region, a resistive junction region, and a channel junction region, which are formed in the cell active region, the resistor active region, and the MROM active region, respectively. Tracking circuitry configured to determine a display position of the main display data within the first display panel and circuitry enabling selection between the main display data and the picture-in-picture display data according to the position are included. A drive motor is mounted to one of the nozzle base and the housing, the drive motor having an output shaft. The outlet selectively communicates with the trap of the toilet bowl. In a range corresponding to the first inflow section, an area of a cross section, perpendicular to the second developer conveyance direction, of the second developer containing chamber decreases along the second developer conveyance direction.