Abstract: The invention relates to a radial piston pump (1) for high-pressure fuel generation in fuel injection systems of internal combustion engines, in particular in a common rail injection system, having a drive shaft (4) which is mounted in a pump casing (2) and has an eccentric shaft section (6) on which a running roller (8) is mounted, and having preferably a plurality of pistons (16), which are arranged in a respective cylinder (14) radially with respect to the drive shaft (4) and each have a piston footplate (18), which makes contact with the circumferential surface (10, 12) of the running roller (8), at their ends facing the running roller (8).

Abstract: The invention relates to a radial piston pump (1) for high-pressure fuel generation in fuel injection systems of internal combustion engines, in particular in a common rail injection system, having a drive shaft (4) which is mounted in a pump casing (2) and has an eccentric shaft section (6) on which a running roller (8) is mounted, and having preferably a plurality of pistons (16), which are arranged in a respective cylinder (14) radially with respect to the drive shaft (4) and each have a piston footplate (18), which makes contact with the circumferential surface (10, 12) of the running roller (8), at their ends facing the running roller (8). The invention provides that at least that surface (28) of the piston footplate (18) which is in contact with the circumferential surface (10, 12) of the running roller (8) consists of a wear-resistant material, namely of hard metal, a ceramic material, a cast carbide material, or cermet.

Abstract: Process for the fabrication of porous bodies mainly constituted by SiC containing ceramic with a microstructure which is interfused with micro-channels which consists of the process steps a) Provision of a pre-body made from cellulose or pulp b) Fabrication of an infiltration solution or a slurry consisting of (A) solvent, polysilazane, polysilane and/or polycarbosilane or (B) solvent, polysilazane and/or polysilane as well as active metallic fillers and/or passive ceramic fillers. c) Infiltrating the body with infiltration solution or slurry d) Cross-linking of the polysilazane, polycarbosilane and/or polysilane while generating a solid green body e) Ceramization through pyrolysis of the green body in an inert-gas atmosphere.

Abstract: The invention relates to a multi-piece valve for reciprocating piston engines in which the valve stem is connected to the valve head in a manner resistant to both tension and compression. In the area of a center through-opening the valve head has an annular bearing surface for a stem-side flange. In addition, the center opening widens on the combustion chamber-side of the valve head, the head-side end of the valve stem being plastically expanded so that it fills this enlargement, forming a positive interlock. In order to improve the service life of the connection between valve head and valve stem, according to the invention the combustion chamber-side enlargement of the center opening and accordingly also the conformed, end-side expansion of the valve stem are of non-circular design so that a positively interlocking torsionally fixed connection is produced between the valve stem and the valve head.

Abstract: The invention relates to a multi-piece valve for reciprocating piston engines in which the valve stem is connected to the valve head in a manner resistant to both tension and compression. In the area of a center through-opening the valve head has an annular bearing surface for a stem-side flange. In addition, the center opening widens on the combustion chamber-side of the valve head, the head-side end of the valve stem being plastically expanded so that it fills this enlargement, forming a positive interlock. In order to improve the service life of the connection between valve head and valve stem, according to the invention the combustion chamber-side enlargement of the center opening and accordingly also the conformed, end-side expansion of the valve stem are of non-circular design so that a positively interlocking torsionally fixed connection is produced between the valve stem and the valve head.

Abstract: A metal-ceramic composite material has a ceramic matrix and at least one metallic phase, which are intermingled with one another, together forming a virtually completely dense body, and which are in contact with one another at boundary surfaces. The boundary surfaces are of acicular form, and the metallic phases and the ceramic matrix intermesh by means of the acicular boundary surfaces. Furthermore, tubular passages, which are filled by at least one metallic phase, pass through the composite material.

Abstract: A process for the desulfurization of an engine fuel onboard a motor vehicle includes separating sulfur-containing components of the engine fuel by selective liquid-phase adsorption on an adsorption material. The adsorption material may be an oxide of Al, Mg, Si, or Ti that is doped with Ag.

Abstract: In a composite lightweight valve for internal combustion engines having a solid valve head provided with a center opening and a valve stem received in the center opening of the valve head in a positively locking manner, the valve components are permanently joined to one another by hot upsetting so as to be capable of withstanding the thermal and mechanical effective during engine operation.

Abstract: A method and an arrangement for testing valve disks of ceramic charge cycle valves for internal-combustion engines is provided. Two stressing rollers are pressed against a radially outer section of a valve seat side of the valve and a third stressing roller is provided against the other side of the valve intermediate the other two stressing rollers.

Abstract: In an emission control system that includes a particle filter, an arrangement is provided upstream of the particle filter, the arrangement being configured to prevent the development of ash-forming compounds of sulfur in the exhaust. The emission control system may be used with a diesel engine.

Abstract: In a composite lightweight valve for internal combustion engines having a solid valve head provided with a center opening and a valve stem received in the center opening of the valve head in a positively locking manner, the valve components are permanently joined to one another by hot upsetting so as to be capable of withstanding the thermal and mechanical effective during engine operation.

Abstract: An exhaust line for an exhaust system of an internal combustion engine having a catalytic converter, the exhaust line being located upstream of the catalytic converter with respect to the flow direction of exhaust. The exhaust line has an externally applied heat-conducting layer preferably made of a metallic material and an internally disposed insulating layer made of a heat-insulating material. The insulating layer and the heat-conducting layer are connected directly and forcewise with one another. The layer thickness of the insulating layer is less than 2 mm, the specific heat capacity c of the insulating layer is less than 106 J/(m3h), and the heat diffusivity &kgr; of the insulating layer is less than 0.01 cm2/s.

Abstract: The present invention relates to an additive for a fuel for the neutralization of SO2 and/or SO3 in the exhaust gases of internal combustion engines operated with the fuel, and a method for the neutralization of SO2 and/or SO3 in the exhaust gases of internal combustion engines. According to the invention, the additive contains one or more metal compounds soluble in the fuel. In the combustion of the fuel these compounds form stable sulfates which are present in solid particles in the exhaust gas. The method of the invention is characterized in that one or more of these additives are added to the fuel and the combustion of the fuel takes place in an oxidizing atmosphere.

Abstract: An electrically heatable glow plug for an internal combustion engine includes a corrosion-resistant metal jacket, a compressed powder filling contained therein, and an electrically conducting coil embedded in the filling. To increase the lifetime of the heating coil, a getter material for binding the oxygen contained in the compressed powder filling is provided. The getter material can be distributed in the form of electrically nonconducting particles in the compressed powder filling. The getter material can also be applied as a coating to the coil or to the inner surface of the metal jacket.

Abstract: An electrically heatable glow plug for an internal combustion engine includes a corrosion-resistant metal jacket, a compressed powder filling contained therein, and an electrically conducting coil embedded in the filling. To increase the lifetime of the heating coil, a getter material for binding the oxygen contained in the compressed powder filling is provided. The getter material can be distributed in the form of electrically nonconducting particles in the compressed powder filling. The getter material can also be applied as a coating to the coil or to the inner surface of the metal jacket.

Abstract: A method for treating sludge by dewatering to form thick sludge and drying to form dry sludge includes the steps of mechanically predewatering thick sludge to produce predewatered thick sludge and mixing the predewatered thick sludge with non-cooled dry sludge to produce a sludge mixture. The temperature of the sludge mixture to be dried is measured and the dry substance contents of the dry sludge based on the measured temperature is determined. Fluctuations in the dry substance contents of the dry sludge are compensated by controlling the amount of recirculated dry sludge to be mixed with the predewatered thick sludge as a function of the temperature of the sludge mixture to be dried. The sludge mixture is dried to produce dry sludge and a portion of the dry sludge is recirculated to be mixed with the predewatered thick sludge.

Abstract: An apparatus for determining the position of a hollow section system which is pressed forward. Measuring apparatus are arranged one behind the other in the hollow section system. Measuring points are also provided. Each measuring apparatus has a light source for marking the position, a position detector, and an optical system. The measuring apparatus are arranged in such a way that the projection of the light source of each measuring apparatus takes place to the position detector of the respective adjacent measuring apparatus. The measuring apparatus are connected to each other for the transmission, and receiving, of signals present at the position detectors. The coordinates of the measuring apparatus can be determined from the signals, and from this the spatial position of the hollow section system can be determined.

Abstract: A soldering foil having a multi-layer structure for the stress-free joining of ceramic bodies to metal is described along with a process for making the foil. The soldering foil contains two layers of an active solder, particularly a Cu/Ti solder, provided with an intermediate cushion layer, preferably of copper, which absorbs the stresses. Between the copper cushion layer and the active solder layers barrier layers of silver are arranged which are very thin in relation to the copper and solder layers. The soldering foil permits a low-stress and extremely durable connection to be established between metal and ceramic, simultaneously permitting relatively large deviations in the temperature and time parameters of the soldering process.

Abstract: A highly doped optical amplifier in the form of a thin layer or fiber wherein the pump light is directed transversely to the surface of the layer or fiber. A transparent substrate is provided underneath the layer or fiber and a solar cell is provided in light receiving relationship to light passing through the layer or fiber on the opposite side of the substrate.