Abstract: An air-compressing direct injection internal combustion engine having a combustion chamber in the shape of a body of revolution which combustion chamber at the end of the compression stroke contains nearly the entire necessary amount of combustion air which by suitable means is circulated about the cylinder axis of the respective pertaining cylinder of the engine. In this engine, a substantial portion of the liquid fuel is in the form of a thin film applied to the combustion chamber wall where it is processed so as to be picked up by and intermixed with the combustion air, whereupon the fuel air mixture is burnt. For purposes of facilitating the processing of the above mentioned fuel film and/or the realization of a pre-oxidation of the fuel, and for facilitating the pick-up of the fuel in the direction of the rotation of the air, additional means are provided and arranged in or on the combustion chamber wall and, when viewed in the direction of rotation of the air are located ahead of the fuel film.

Abstract: A process and apparatus for the separation of gas bubbles from a liquid which is subjected to a flow, in which a flowing portion of the liquid is brought into contact with an arcuate wall at an opening and deflected into a relatively quiescent liquid along a surface, so as to produce a vortex at the contact surface between the two liquid portions in such a manner as to project the vortex into the flowing portion as well as into the relatively quiescent portion, and whereby its axis extends in parallel or almost parallel to the contact surface, so that gas bubbles will be conducted from the flowing liquid portion by the vortex into the relatively quiescent liquid portion, from which the gas bubbles will then separate out under the influence of buoyant force.

Abstract: An internal combustion engine having in the piston crown or cylinder head a combustion chamber in the shape of a body of revolution with a constricted throat. At the end of the compression stroke, the combustion chamber accommodates substantially all of the air for combustion which is imparted a rotation about the longitudinal axis of the combustion chamber.

Abstract: A method for preventing undesirable heat losses in a cooling system for liquid-cooled vehicular internal-combustion engines by affecting the flow at the connections of the lines to and from the header tank of the cooling system by measures commonly practiced in flow engineering such that the pressure will be the same at the inlet and the outlet of the header tank, so that with the thermostat closed no coolant is allowed to flow through the header tank and on through the radiator. With a cooling system having an engine vent line which connects to the header tank this method produces, by affecting the flow in the engine vent area and with the engine running and the thermostat closed, a pressure at the connecting point of the vent line for engine venting which is equal to that prevailing at the entry of the vent line to the header tank.