KRAFTSTOFF-LUFT-GEMISCHBILDUNGSVORRICHTUNG FUER VERBRENNUNGSMOTOREN

摘要

The invention proposes an air-fuel preparing device for internal combustion engines having a rotationally symmetrical nozzle body (2) which, together with a rotationally symmetrical restrictor body (8) displaceable therein, forms a convergent-divergent nozzle, which opens into a radial diffusor (6). A fuel gap (11) into which at least one fuel feed line (9, 10) opens is provided in the vicinity of the narrowest cross-section (5) of the nozzle, enclosing this and opening into it. The radial diffusor is formed by an area of the nozzle body curved outwards in the direction of flow of the mixture and by a wall (15) of a component (17) facing the nozzle body, rotationally symmetrical to the axis of rotation (1) of the restrictor body and forming a modular unit (18) with an intake pipe (7) of the internal combustion engine, the wall having a curvature (16) directed at the restrictor body. By virtue of its design, the radial diffusor allows a fuel film, inevitably being deposited on the wall of the diffusor when the fuel is injected, to detach itself, thereby forming an improved mixture. ……