Abstract: A cold start burner for prewarming components of an engine, especially for prewarming engine exhaust upstream of a catalytic converter. The device generally includes a pot shaped (i.e., cylindrical) burn chamber and a similarly shaped preheat chamber positioned concentrically around the burn chamber. An igniter is positioned within the burn chamber, and fuel is supplied into the burn chamber to be ignited by the igniter. Air is directed into the relatively cool preheat chamber and is then directed by the cooling of the preheat chamber to a plurality of openings extending through the side wall of the burn chamber. The air passes through the openings and into the burn chamber where it is preheated and then directed into an exhaust line upstream of the catalytic converter. Excess (i.e., unburned) fuel is collected in a reservoir formed within the burn chamber.

Abstract: Soot filter for diesel vehicles. A filter unit within a casing, preferably with conical-shaped exhaust supply and exhaust-discharge pieces (Abgaszu und Abgasabfuhrstutzen), a filter structured with numerous, parallel channels, divided by thin filter walls, with half of the channels (unrefined gas channels) open to the exhaust supply piece and the other half (refined gas channels) to the exhaust discharge piece, while they are all sealed at the opposite end, with the unrefined gas channels leading into the soot chamber equipped with a soot discharge opening, which may be closed.

Abstract: A device for use in association with a carburetor of the type used for supplying fuel at the intake manifold of a gasoline internal combustion engine has an annular chamber at the exit port of the carburetor, adapted to collect uncarbureted raw gasoline particles or globules for drainage through an external vaporizing system under the influence of the vacuum created at the intake manifold during operation of the engine for reintroduction as vaporized fuel at the intake manifold, thereby converting raw gasoline, otherwise wastefully fed to the engine, into efficiently combustible fuel.

Abstract: A carburetor communicating with an intake manifold of an internal-combustion engine receives preheated air through an annular filter heated electrically during a cold-starting phase and fluidically with the engine in operating condition, the air passing around a flap valve--acting as an automatic choke--into a mixing chamber to aspirate a volatile hydrocarbon such as gasoline from a main fuel tank. The flap valve is heated in the same manner as the filter, and so are a pair of accelerator-controlled throttle valves separating the mixing chamber from a further compartment into which a heavier hydrocarbon such as diesel oil is aspirated in vaporized form after passing from an ancillary fuel tank through a boiling cylinder heated by the exhaust gases of the engine.