Abstract: A method and apparatus for gas-dynamic cold spraying a liner 3 in a cylinder 2 of an aluminum engine block 1 is provided. The gas-dynamic cold spray liner 3 allows the aluminum engine block 1 to have a hardened cylinder surface 10 without the induction of residual hoop stress within the aluminum engine block 1.

Abstract: A method for machine a V crankshaft. A measurement is made of the dynamic mass and the centering points are drilled. The reference surfaces are preset by machining the raw crankshaft reference surfaces before the dynamic mass measurement.

Abstract: Immediately after a laser-cladding is performed, a control surface is formed by machining the clad metal while an extra metal is left. An intermediate inspection is performed about presence/absence of any defect in the clad metal using the control surface. When a defect is detected, the clad metal is removed, and a laser-cladding is performed again. Since an extra metal where an amount of clad metal required can be secure exists, re-cladding can be made possible.

Abstract: A light metal cylinder crankcase for combustion engines has cylinder bushings with a running layer that forms the running surface and a rough, external bonding layer for bonding the cylinder bushings to the cylinder crankcase while pouring the cylinder crankcase. At least 60% of the bonding layer relative to the jacket surface of the bonding layer is connected with the casting material of the cylinder crankcase in a material tight manner.

Abstract: The present invention includes a light metal cylinder block comprising a cylinder running face which is coated with silicon. The invention also includes a method by which the silicon is applied to the running face comprising melting powdered metal silicon, which is fired at the face in a powdered metal beam, under heat of a laser which is fired at the running face at the point of impact of the powdered beam. Furthermore, the invention includes a device with which the cylinder block may be manufactured.

Abstract: A method of manufacturing a cylinder for an internal combustion engine, which is manufactured by a process wherein a raw cylinder body having an insert core left remained therein is obtained using an insert core comprising a cylindrical body having almost the same outer diameter as the diameter of bore of the cylinder, and a scavenging port-forming portion projecting radially outward from the cylindrical body and having almost the same cross-sectional configuration as that of the scavenging port, the cylinder bore of the raw cylinder body thus obtained is then subjected to a boring to remove the cylindrical portion of the insert core, and the scavenging port-forming portion of the insert core which is left remained in the raw cylinder body is removed by making use of a press.

Abstract: A method of manufacturing a cylinder for an internal combustion engine, which is manufactured by a process wherein a raw cylinder body having an insert core left remained therein is obtained using an insert core comprising a cylindrical body having almost the same outer diameter as the diameter of bore of the cylinder, and a scavenging port-forming portion projecting radially outward from the cylindrical body and having almost the same cross-sectional configuration as that of the scavenging port, the cylinder bore of the raw cylinder body thus obtained is then subjected to a boring to remove the cylindrical portion of the insert core, and the scavenging port-forming portion of the insert core which is left remained in the raw cylinder body is removed by making use of a press.

Abstract: A device comprising an outer body (6) integral with a guide tube (4) defining on its own a blind ring-shaped cavity (40) axially oriented wherein a piston (3) moves guided by the guide tube (4). The guide tube (4) is produced by impact extrusion. The invention is applicable to motor vehicles.

Abstract: Surface activation is intended to ensure that a cylinder liner can be anchored in the casting material of a light-metal crankcase with greater bonding. For surface activation, the surface of the cylinder liner is roughened mechanically. Advantageously, copper particles are also implanted into the treated surface. It is necessary to ensure that the time span between surface activation and casting-in is short. Moreover, the activated surface, as far as possible, should not be touched by hand.

Abstract: A heater head assembly for a multi-cylinder heat engine the stirling engine, such as a multi-cylinder Stirling engine, having a plurality of regenerators and cylinders. Each regenerator has a regenerator manifold and each cylinder has a cylinder manifold. First identical cast heater tubes connect the regenerator manifold to first heater tube openings in a heater head manifold. Second identical cast heater tubes connect second heater tube openings in the heater head manifold to the cylinder manifold. The first and second heater tubes are parallel with respect to each other and form a pair of partial concentric staggered arrays. The heater tubes are rotationally asymmetric, having fin sections with less surface area upstream than downstream and thicknesses which decrease radially away from the central passageways of said heater tubes.

Abstract: The present invention includes a light metal cylinder block comprising a cylinder running face which is coated with silicon. The invention also includes a method by which the silicon is applied to the running face comprising melting powdered metal silicon, which is fired at the face in a powdered metal beam, under heat of a laser which is fired at the running face at the point of impact of the powdered beam. Furthermore, the invention includes a device with which the cylinder block may be manufactured.

Abstract: A process is provided for automatically screw-connecting two components using the torque-controlled tightening method, and to a stud and a union nut provided for carrying out the process. Also provided are an automatic fitting machine and a connecting element via which the two components are screw-connected. In order for it to be possible to execute the screw-connection operation quickly and to obtain a secure connection between the two components, the process provides for the connecting element first of all to be pre-tightened with rotary-angle control and then to be tightened definitively with torque control. The connecting element has two same-direction threaded sections of different pitches and each threaded section is screw-connected to one component in each case. The stud for carrying out the process has a screw head for the engagement of a suitable fitting tool, a marking which indicates the angular position of the stud being arranged on the screw head.

Abstract: A process for producing a cylinder having at least one longitudinally extending outward bulge and a steel base, for a piston-cylinder unit. The process including the steps of initially machining a round input ingot to size, the ingot having a length, subsequently heating the ingot to a deformation temperature between 1250° C. and 1310° C., descaling an entire surface of the heated ingot with pressurized water, subsequently inserting the ingot into a mold, piercing the ingot in a sharply increasing manner using a mandrel so as to form a pierced piece with a base, applying a lubricant to the mold and the mandrel prior to piercing, subsequently ejecting the pierced piece from the mold, cooling and descaling the ejected pierced piece, and mechanically finish-machining the pierced piece to produce the cylinder.

Abstract: A method of repairing a cylinder head of a water cooled internal combustion engine that has damage to the boundary wall between a cooling water passage and the combustion chamber. According to the method. the boundary wall B located between a cooling water passage and a combustion chamber and including a crack is cut away from a cylinder head until the cut reaches a depth of one half the cross section of the cooling water passage. Then, a half-pipe portion. having a semicircular cross section that is equal in size to one-half the cross section of the cooling water passage is fixed in the cylinder head from which the boundary wall B has been removed such that an inner surface of the half-pipe may serve to form a cooling water passage after repair. With the use of the above method, the repair operation is completed easily with a low cost because the boundary wall B has only to be cut away to a shallow depth.