Abstract: An internal combustion engine having a prechamber with first and second sub-chambers. The first sub-chamber has a prechamber gas valve and an igniter. The second sub-chamber has a plurality of first orifices to couple with a main combustion chamber. The second sub-chamber is coupled to the first sub-chamber via a direct connection or an indirection connection. The direct connection includes at least one second orifice, such as a plurality of second orifices. The indirect connection includes a third sub-chamber, wherein the third sub-chamber is coupled to the first sub-chamber by at least one third orifice (e.g., a plurality of third orifices), and the third sub-chamber is coupled to the second sub-chamber by at least one second orifice (e.g., a plurality of second orifices).

Abstract: Pre-chamber for an internal combustion engine, preferably gas engine, comprising: a pre-chamber body; a pre-chamber volume which is surrounded by the pre-chamber body; and a pre-chamber tip portion comprising at least two, preferably more than two, spray nozzles, wherein the at least two spray nozzles are in fluid communication with the pre-chamber volume, and the pre-chamber tip portion is affixed to the pre-chamber body by a welding process or a brazing process; wherein the pre-chamber body consists of a material with higher thermal conductivity than the pre-chamber tip portion.

Abstract: An alloy is proposed for use in making permanent magnets. The alloy has the following composition by weight:______________________________________ Chromium 22.5 to 25.5% Cobalt 15.0 to 17.5% Molybdenum 2.0 to 4.0% Silicon 0.1 to 0.8% Oxygen less than 0.10% Effective carbon less than 0.06% Remainder iron and unavoidable impurities, ______________________________________where effective carbon is defined as carbon content plus 0.86 times nitrogen content.In a method of manufacturing permanent magnets, a workpiece is made of the alloy, for example by suction or extrusion casting, and the workpiece is subjected to a heat treatment comprising:(a) a homogenizing annealing for 15 minutes to 3 hours at 1230.degree. C. to 1280.degree. C., followed by quenching in water or oil; and(b) a thermo-magnetic treatment for 10 to 30 minutes at 720.degree. C. to 740.degree. C., followed by the application for 10 to 120 minutes in a preferred axial direction of a magnetic field of 80 to 240 kA/m at a temperature of 630.degree. C.

Abstract: The invention relates to a nickel/iron casting alloy, containing no cobalt, exhibiting high strength at elevated temperatures accompanied by insensitivity to thermal fatigue, and possessing microstructural constituents which are thermodynamically highly stable. The alloy exhibits high hardness at elevated temperatures, outstanding resistance to oxidation, corrosion and wear, as well as good welding properties. The alloy is particularly suitable as a material for nuclear reactor components, and is composed of1.1 to 1.6% of carbon0.5 to 1.5% of silicon0.01 to 0.2% of manganese22 to 26% of chromium12.5 to 14.5% of molybdenum0.2 to 0.8% of niobium (columbium)35 to 40% of nickelless than 0.01% of boronless than 0.002% of tantalum and18 to 26% of iron, to make up 100%.

Abstract: Disclosed herein is a highly wear-resistant, corrosion-resistant steel having high thermal resistance and tempering stability which consists of Fe; 0.7-1.7%C; 0.01-0.08%N; 0.02-1.5%B; 0.01-1.5% Si; 0.01-1.0% Mn; 5.0-15.0% Co; 3.0-7.0% Cr; 13.0-20.0% Mo; 0.02-2.0% Nb and/or Ta. The steel may additionally contain up to 10.0% W and up to 5.0% V.