GB870993A - A method of operating an internal combustion engine with the simultaneous recovery of the unused heat of combustion, and an internal combustion engine for performing the method - Google Patents

Abstract

870,993. Working cycles; combustion chambers. MASCHINENFABRIK AUGSBURG-NURNBURG A.G. Nov. 14, 1957 [Nov. 17, 1956], No. 35543/57. Classes 7(2) and 7(3). [Also in Group XXVI] A space 6 of practically capillary width surrounding a perforated or porous liner 4 of a combustion chamber 2 receives prior to combustion an emulsion of liquid fuel and water from an injector 8, or liquid fuel and water respectively from separate channels of the injector or from separate injectors 8, 88, the fuel and water spreading in a thin film over the walls of the space 6 and using heat stored from the preceding combustion to react endothermically and form carbon monoxide and hydrogen which pass through the liner 4 to be ignited in swirling or turbulent air in the chamber 2 by compression ignition, electric spark or catalytic igniters or an igniting jet. As shown, with a combustion chamber in the working piston, the injector 8 is in the cylinder head and injects through a channel or channels 10 in a plate 4a which alone or together with members 5 mounts the liner 4. Thermal insulation 17 assists heat storage. The chamber 2 may be partly in the piston and partly in the cylinder head, or wholly in the cylinder head when the injector or injectors are at the chamber base. The chamber 2 may be spherical or cylindrical. The space 6 and perhaps the inner surface of the liner 4 has a porous ceramic or metallo-ceramic coating carrying platinum, nickel or aluminium hydroxide acting as a catalyst for the endothermic reaction. The invention is applicable to two-stroke or four-stroke working, the fuel and water preferably being injected before the compression stroke, and possibly before the suction stroke in the latter case, although they may be injected at any time up to the end of the compression stroke.