Abstract: Electronic engine management systems have a plurality of individual components, some of which are relatively far away from one another. Electrically connecting the individual components, particularly to an electronic control unit therefore requires relatively long electrical connecting lines and relatively many plug connection. The apparatus includes a plurality of components, that is, at least one throttle device accommodated rotatably in a throttle valve housing and actuatable by a throttle valve control motor, an electronic control unit, a regenerating valve, and/or an air flow rate meter, which according to the invention are accommodated in a common housing as a premountable structural unit. The apparatus of the invention is intended in particular for mixture-compressing internal combustion engines with externally supplied ignition.

Abstract: The housing (10) of an electrical device, in particular a switching and control device for motor vehicles, includes an upper shell (11) and a lower shell (12), and PC boards (15, 25) are located in both shells (11, 12). The required power components (17) are distributed to both PC boards (15, 25). The lower shell (11) of the housing (10) has side walls (16) encompassing three sides. The upper shell (11) has, in addition to the outer rim (21) extending around three sides, a protrusion (22) protruding into the housing on two opposed sides, so that a space (23) is created between the rim (21) and the extension (22). In the assembled state, the side wall (16) protrudes into the space (23) in the other shell (12). The power components (17) rest on the inner wall of the side wall (16) or of the extensions (22), so that the lost heat can be dissipated in a simple way.

Abstract: Securing mechanisms are employed in known plug connections, which have components designed in a complicated way, the manufacture and assembly of which entails high cost and which result in bulky plug connectors. The plug connection in accordance with the invention is designed in such a way that a securing ring (18) formed in one piece on a second part (11) has stop shoulders (29) which, for securing the plug connection, grip, stationary detents (46) of a first part (41). The securing ring (18) has the shape of a convexly closed polygon (24), the corner points (26) of which have a reduced wall thickness in comparison with the polygon lines (27). The polygon lines (27) can be kinked at the corner points (26) by means of squeezing pressure forces acting on the securing ring (18), which allows the disconnection of the securing of the plug connection. This results in a plug connection of low mass which can be manufactured in a cost-effective manner.