Abstract: An injection nozzle for diesel engines is disclosed with a direct fuel injection into combustion air in the combustion space having a swirl. The nozzle is constructed as a hole-type nozzle with several injection openings arranged at uniform distances and distributed along the nozzle circumference. In order to further develop such an injection nozzle in a manner which permits shorter injection durations and an improved utilization of the air, an additional injection opening with a smaller diameter is constructed in each case between two adjacent larger injection openings, whereby the overall cross-sectional surface of all injection openings becomes larger without any drifting into one another of the thus formed fuel sprays.

Abstract: A metallic alloy part having a bonded coating that includes dispersed hard-material particles embedded in a metal matrix, composed of a eutectic solder whose alloy elements include at least the base metal of the metallic alloy part. The solder is formed by fusion bonding on the metallic alloy part, a precoating composed of sequential layers of the elemental components of the solder applied on the metal part or on the hard-material particles. The composition and disposition of the various layers are graduated such that the melting points of the elemental solder components increase towards the outermost layer.

Abstract: A process for the removal of organic materials from the surfaces of drive components, particularly for the removal of meltable organic coatings, fillings or damping materials. The organic material is first melted in a bath of the same or similar organic material and an adhering residual film is diluted and stripped off from the preheated drive component by applying tempered oil thereto. After this, a diluting and striping off of a material film, which essentially consists of oil molecules still adhering to the surface, is conducted by applying an organic cleaning agent, which is free of fluorochlorohydrocarbons and chlorohydrocarbons. Then a post-treatment of the surfaces of the drive component is effected by one or more steps of applying diluted cleaning solutions with intermediate rinsing and/or drying steps, in which the cleaning solutions are increasingly diluted stepwise.

Abstract: An accumulator-type injection system having an injector and a control valve connected with the injector for controlling injection. In a first switching position of the control valve, an injector body fuel duct, which leads in front of the orifices, is connected with a fuel accumulator. In a second switching position, a passage is opened up by the control valve which connects the fuel duct with a return flow. As a result, in the injection pauses, the fuel pressure in front of the orifices can be lowered approximately to the ambient pressure so that the inclusion of water in front of the orifices takes place at a low pressure.

Abstract: This invention relates to a method and apparatus for recognizing the impact time of a solenoid valve armature during de-energizing. In order to obtain a detectable impact signal of the armature, a measuring current is provided in the magnet coil during the armature's downward movement to generate a magnetic measuring field. When this magnetic measuring field is changed due to the armature movement, an induction voltage is generated, which is monitored to detect the time of impact of the armature.

Abstract: An arrangement is disclosed for distributing and supplying and removing a coolant to and from a wall of a turbine engine, in particular a turbine dynamic jet engine, which is subjected to the flow of a hot fluid and has cooling channels which can be acted upon by the coolant and which are arranged substantially parallel to one another in the wall. The arrangement includes tube guides which are spatially separated from one another and connected to the wall, a casing of each tube guide having a longitudinal slot, each tube guide being attached on an inlet or outlet side to the respective cooling channels by way of the longitudinal slot and apertures in the wall, and a soldering or welded seam connecting the tube guides to the wall along the respective longitudinal slot.

Abstract: A structural component is formed with an outer shell of sintered, solid, powder particles, and a porous core of sintered, hollow, bodies arranged in layers. The hollow bodies are of increased diameter in the layers in a direction from the outer periphery of the core towards the center of the core. The material of the outer shell and of the core is a metal or ceramic.

Abstract: Structural components (2), such as turbine blades (16) partially to be coated, for example with precious metal coatings, are inserted into a circumferential pocket on a carrier wheel (8), so that surface areas (10, 10A) protruding radially outwardly are presented for a coating operation, for example by vapor deposition, gas diffusion, plasma spraying, or sputtering, while surface portions (9) of the components within the wheel are protected against coating by wheel disks (8A, 8B). The wheel is rotated either continuously or stepwise through an active coating chamber (3). Surfaces to be coated participate in forming first and second walls for enclosing a coating space (11). Other walls of the space (11) are formed by one or two coating sources (12, 13), such as cathode sputterers, whereby the need for screens or masks (4, 14) that form the remaining walls of the space (11) are minimized. The bottom (59) of the space (11) is preferably formed by wall portions (4A) of the turbine blades (16).

Abstract: Run-on linings for turbo-engines are arranged between the free ends of moving blades and a housing of a compressor or a turbine of a turbo-engine. The run-on linings are formed of a carrier and fiber bundles and are fastened on the circumference of the housing.

Abstract: Work pieces to be galvanically coated or plated are held in place with a good electrical contact by a holding device having an electrically conducting hollow carrier (2), a magnet (3) removably mounted inside said hollow carrier (2) the ends of which are closable for protection of the magnet in a galvanic bath. A cover (4), with receptacles (28) or bore holes in which the work pieces or parts (12) are received, is clamped to the carrier (2) by a releasable clamping device (5). The magnet (3) is arranged alongside a contact surface (19) through which the magnet holds the parts (12), since the pole axis (P) of the magnet (3) extends perpendicularly to the contact surface (19) which may be formed by a machined surface of a carrier wall or by an electrically conducting ferromagnetic plate secured to the carrier.

Abstract: A cylinder head has four valves and an injection valve arranged in the center thereof for an internal-combustion engine particularly for a diesel engine. The cylinder head includes a closed runner which is arranged concentrically with respect to an axis of the injection valve and which connects a compression bottom with a top side of the cylinder head. Coolant bores extend in direct proximity to inlet and outlet ports from a circumference of the cylinder head to an interior water space of the cylinder head.

Abstract: A process and a suitable arrangement for cooling diesel engine exhaust gases in an exhaust gas recirculation system is provided. In order to be able to avoid a contamination of the heat exchanger as well as a resulting required regenerating of the latter in the case of a cooling of the hot exhaust gas flow over a large temperature range, the cooling of the hot exhaust gas flow is carried out in at least two steps in that the exhaust gas flow flows successively through two heat exchangers which are each adapted to the corresponding cooling temperature range. By adapting the heat exchangers to specific small temperature ranges, even hot exhaust gas flows of up to 800.degree. C. can be cooled to a desired low temperature by the series connection of a corresponding number of different heat exchangers, without causing significant contaminations of the exhaust gas cooling arrangement by exhaust gas particles.

Abstract: A stator construction for turbomachines includes a plurality of support segments (3) and a plurality of guide vane segment roots (2) forming an inner shroud, with an abradable seal liner (4) provided on the radially inner surface of the support segments. An interlocking connection is provided between the vane segment roots and the support segments. The vane segment roots and support segments interlock with one another via radially extending annular flanges (21, 31), and annular grooves (23, 33) provided in the side faces (22, 32) of the annular flanges mate with one another to form annular channels therebetween. To secure the interlocked connection, an annular securing wire (5) is inserted into the annular channels. Spring members (6) may be arranged in annular spaces between the support segments and the vane segment roots.

Abstract: An exhaust gas pipe for multicylinder, supercharged internal combustion engines has an outer gas-tight casing (2) and an inner hot gas pipe (1) made up of segments (5) of cast parts securable by screws (8) which project into the casing (2) from the outside.

Abstract: A rotor of a turbomachine includes blades having an improved blade root configuration for anchoring and centering the blade roots in axial slots of the rotor disk. Each blade root includes two portions or sections, namely a serrated section that has a single bilaterally uniformly shaped serration, and a terminal portion that has rounded surfaces and a narrower cross-section than the serrated root section. The serrated section provides anchoring against centrifugal forces. The terminal portion provides the predominant centering effect, for which it is radially movably received and located in a recess provided in the bottom of the slot. The special root configuration substantially avoids misfit and centering problems associated with manufacturing variances, whereby the blades and blade roots can be made of lightweight engineering materials.

Abstract: In the device, the turbine blades are anchored with blade feet, which are profiled like teeth, to correspondingly shaped axial grooves of a wheel disk. An axial gap is left between each blade foot end and the base of an axial groove, in which gap a securing element is disposed. The securing element can be bent on both ends, which protrude out from the gap, directed opposite each other against faces of the wheel disk and a blade foot, and is clamped in a wedged manner in the relevant axial gap between the groove base and the blade foot. The securing element bridges over a recess, which is formed in the blade foot to receive a balancing mass.

Abstract: A turbojet fan engine is disclosed having a fan or prop fan which blows air into a secondary channel and an external shroud for the turbine and the secondary channel, in which the front end of the shroud is formed with an inlet lip and the rear end of the shroud is formed in a nozzle-like, pointed manner and at least one end of the shroud is changed, with respect to its effective profile geometry, by means of air under pressure which is taken from the engine and blown out at the appropriate end of the shroud.

Abstract: The curvature of an edge such as the trailing edge of a turbine blade having a specular reflection surface is inspected by illuminating the surface area to be measured with a laser beam and sensing the reflected laser light. The laser beam intensity across the cross-section of the laser beam is varied by a radiation intensity matrix located between the laser beam generator and the edge to be sensed or measured, whereby local radiation intensity variations are provided in the form of illuminating laser beam segments (A, B, C, . . . ) having different intensities. The beam reflected segments (A', B', C', . . . ) have a reflection angle that is equal to the incidence angle of the respective illuminating laser beam segments (A, B, C, . . . ). This fact is used for the correlation (A, A'; B, B'; C, C', . . . ). The reflected beam segments (A', B', C', . . . ) are scanned in a line-by-line fashion whereby the radiation intensity values varying along the curvature are measured.

Abstract: A component made of an intermetallic compound of titanium and aluminum, or of alloys of such intermetallic compounds with alloying additions forming the base material, and with an aluminum diffusion coating on the base material, is provided. The component has, between the base material and the aluminum diffusion coating, a closed zone which is close to the surface and has a recrystallization structure. For this purpose, the component is cold-formed or slightly melted in a zone which is close to the surface, is then annealed at the recrystallization temperature, and finally has an aluminum diffusion coating applied to the recrystallized zone. The process is used for components in engines and, particularly, for components in the hot-gas duct of an engine.

Abstract: A blank material for manufacturing fiber-reinforced coatings or metal components comprising fibers made of a high-strength material and metals or metal alloys, and a process for manufacturing the blank, and for manufacturing coatings and components made therefrom. The fibers are aligned in the blank in parallel to its axis, and metal wire meshes are knitted around them, with the fibers embedded at a distance from one another. By means of high-temperature isostatic pressing, metal components can be made, through which the reinforcing fibers extend at a uniform distance.