Abstract: A casting tool for an air intake duct includes a mold and exchangeable extractable cores for the formation of a cavity. The exchangeable extractable cores are provided for the mold, by which, while retaining the mold as such, different air intake duct geometries, especially different air intake channel cross sections, can be produced. In this manner a plurality of intake duct variants can be produced at substantially constant tool costs. This permits the economical use of injection molded synthetic resin air intake ducts, since the very expensive casting tools can be provided for a sufficient number of air intake ducts.

Abstract: A centrifuge rotor for a free jet centrifuge for cleaning lubricating oil of an internal combustion engine. The rotor has an inlet, at least one drive nozzle outlet, and a sediment deposition surface interiorly in the rotor. A bearing is provided for rotatably mounting the rotor in a surrounding housing where the bearing includes a friction bearing which simultaneously forms the rotor inlet and a roller bearing which is receivable in a bearing receptacle formed in the surrounding housing. The roller bearing is sealed off from the rotor interior.

Abstract: An apparatus for gas recirculation in an internal combustion engine in which recirculation is effected via a connecting line (2) in which a filter element (4) is arranged between the exhaust duct and the connection on the intake device of the internal combustion engine.

Abstract: An insert for reinforcing a flange component and an intake manifold for an internal combustion engine in which such an insert is used. The insert (14a) is open toward a longitudinal side (17) of the cylinder head flange (13), so that a mounting bolt does not have to be pushed through the passageways (16) formed by the insert, but can be inserted from the side. This offers advantages during mounting, since the intake manifold can be pushed onto pre-mounted bolts, which are subsequently tightened to fix the intake manifold. The intake manifold and the described insert are therefore particularly suitable for cost-effective mounting in tight spaces.

Abstract: A filter element 10 for purifying fluids having a filter medium 11, an enclosure member 12, and a rod 13. The filter medium 11 has folds 14, which may be zigzag-shaped, and which define a fold height 15 and a pleat surface 16. At right angles to folds 14 extend end faces 17, which represent the course of the folds 14. The enclosure members 12 are arranged on the end faces 17. To support the folds 14, the rod 13 pierces through the pleat surfaces 16 of the folds 14 creating joints 19. These joints 19 are sealed, e.g., by additional seals or by fusing the filter medium to the support rod or the support rod to the filter medium.

Abstract: A duct or conduit section (10) for installation, in particular, in an air intake system of an internal combustion engine, in which the duct section is composed of two shells (14) which are joined by a snap connection (15). Openings located in the parting seam or joint (16) between the shells (14) are produced by recesses in the half shells. These openings each have a cross-sectional area of less than 7 mm2 and are useful for suppressing noise resulting from the air intake. As a result of the openings, vibration-inducing forces exerted on adjacent components in the engine compartment due to pulsations in the intake tube, can be minimized or avoided. Also, the quantity of additional air drawn in from the engine compartment, which is undesired because it is too warm, is decreased.

Abstract: A multi-component hollow structure including at least two synthetic resin housing parts (1, 3) with corresponding sealing surfaces (2, 4), and at least one half wall per housing part, in which the half walls of one housing part meet corresponding half walls of the other housing part in order to reinforce the hollow structure, and in which the corresponding sealing surfaces (2, 4) and the half walls (6, 7) are joined using a friction force, such as vibration welding or ultrasonic welding. A method for producing such multi-component hollow structures is also disclosed.

Abstract: An assembly for an internal combustion engine comprising an oil filter in a first housing structure 11 and, for instance, an oil separator in a second housing structure 12. The two housing structures can be combined to form a modular assembly. The assembly includes duct structures 20, 21 which are combined to form a common line segment 22 to reduce the material and manufacturing costs for the assembly. The different duct structures may include, for example, an oil drain 20 for the oil filter, which simplifies service (changing the filter element). The duct structure of the second housing structure can serve, for example, to transport crankcase gases to an oil separator in the second housing structure or to return separated oil from the oil separator to an engine crankcase. The oil drain of the oil filter housing may be combined with the drain the oil from the oil pan of the internal combustion engine, and the two drains may optionally be closed by a single drain plug.

Abstract: A molding tool for producing several assembly injection molded components, especially assembly injection molded switching dampers, which are combined into a subassembly by inserting an insertion part, and a method for producing such a subassembly from several components using the molding tool of the invention. The insertion part is encapsulated at least partially by one or more of the components to be injection molded, as a result of which a completely assembled subassembly is produced in the original molding process. This can be, for example, a switching damper assembly 18, which results from a common actuating shaft 17. In this way, assembly injection molded components 14, 15 with a complicated structure can be produced, for which a molding tool with only a single molding cavity would not be usable. The individual components 13 are produced in different mold cavities, which preferably are mounted rotatably on a carousel.

Abstract: A method and apparatus for monitoring service-intensive replaceable parts in an assembly in which information regarding a replaceable part (1), such as specifications, physical dimensions, physical properties, functions and/or other data for the replaceable part, is stored on a suitable memory component (5) in and/or on the replaceable part (1). The stored data is read with a reading device at a predetermined time or at predetermined time intervals and transmitted to an evaluation unit. The read data can be compared in the evaluation unit with preset data and, after evaluating the results of the comparison of the data, an appropriate change in the replaceable part or in the operation of the assembly may or may not be carried out.

Abstract: An intake system (13) for an internal combustion engine (12) which includes a housing (15a) with a filter insert (16) and a membrane (22) for separating nitrogen and enriching the combustion air with oxygen. The membrane is integrated into the filter housing so as to save construction space and provide a lower cost system. The membrane (22) can alternatively be arranged on the clean air side of the air filter insert (16) to prevent the membrane from being soiled and to improve the functional reliability of the oxygen enrichment. Alternatively, instead of arranging the membrane (22) on the clean side of the filter insert (16), the membrane can be protected from being soiled by using a cover (23).

Abstract: A filter device for separating water and other impurities from liquid fuel including a housing body (11), inside which a first filter element (12) is disposed; a collector vessel (17) which is disposed underneath the filter element (12); a pump (25) which is used to remove water present in the collector vessel (17), and a detector (23) which is used to determine whether water has accumulated in the collector vessel (17).

Abstract: A fluid feed duct, which may be used for feeding a stream of recirculated exhaust gas into a stream of intake air for an internal combustion engine. The feed duct includes a hollow structure (10) into which a feed connection (12) is introduced via a joint structure (34). A ceramic pipe (16) is used to prevent heat from the exhaust gas stream from being conducted to mounts in the hollow structure (10) which represents the intake duct of the engine. Consequently, the intake duct can be manufactured of a thermoplastic synthetic resin material, since the risk of thermal overstressing is avoided. The feed connection also has a deflecting segment (19) which is provided in its sides with outlet openings (20). This enables the exhaust gas to be introduced in the direction of flow of the intake air, so that optimal mixing is assured and the hot exhaust gas stream is prevented from passing directly to the wall of the thermoplastic intake duct, thereby preventing the intake duct from being melted.

Abstract: A support tube for a fluid filter, particularly a support tube made of synthetic resin material, which is made up of two substantially identical tube parts (3) each of which has at least one inlet opening (4), at least one outlet opening (5) and at least one radial sealing area (6) and/or axial sealing area (7), and at least one connecting region (8) which engages the other tube part to connect the tube parts and form an assembled support tube.

Abstract: An intake system for an internal combustion engine to avoid water intake, which includes a main air inlet (10), an auxiliary air inlet (11), and an air filter (12). In the main air inlet (10) there is a valve 16 to sealingly close the main air inlet (10) and a moisture sensor (15), which is connected so as to communicate with an evaluator (22) which, in turn, is connected to at least one other sensor (23) disposed outside the intake system and provided to detect other functions. Examples of possible other sensors (23) include rain sensors and/or temperature sensors. The sensor signals are coupled and or correlated in the evaluator (22), and in accordance with a logic which resides in the evaluator (22), a control signal is produced that opens or closes the main air inlet (10) by means of the valve (16), which can be moved into the respective open or closed positions by any of a number of diverse types of drives, such as, electrical, pneumatic, or electro-pneumatic drives.

Abstract: A mounting arrangement for an intake manifold and a method of making same. The mounting arrangement includes an adapter plate attached to a cylinder head of an engine. The adapter plate has at least one aperture having a smooth inner surface. The intake manifold includes at least one inlet pipe and is mounted to the adapter plate by arranging the at least one inlet pipe in the at least one aperture of the adapter plate. A securing mechanism is arranged between the at least one inlet pipe and the smooth inner surface of the at least one aperture. The mounting arrangement of the present invention substantially isolates the intake manifold from vibrations caused by the operation of the engine, which in the past have been transmitted to the intake manifold by way of mounting flanges.

Abstract: An intermediate flange system for an internal combustion engine with direct fuel injection. The intermediate flange system is mounted between the intake device and the cylinder head and includes two subunits (10, 11). The first subunit includes a basic body (12) and is responsible for conducting the fuel. The other subunit includes a basic body (13) and serves to conduct the intake air. Both basic bodies can be optimally designed as a function of demands to which they are subjected. Thus, basic body (13) is preferably made of synthetic resin material, and basic body (12) of aluminum. Consequently, the overall intermediate flange system is lighter than prior art systems, which heretofore have been made entirely of aluminum.

Abstract: A filter including a housing with a bottom shell (11) and a cover (13) for receiving a filter element (10). The filter element has a seal (17) that is made of non-woven material and is also used as a filtering medium. The filter element is clamped in a slot (16) between clamping ribs (20) and clamping grooves (21). Manufacturing tolerances of the housing parts can thus be compensated over a wide range. This leads to improved economic efficiency in the manufacturing process, especially as regards the production of synthetic resin housings. In addition, the assembly and retaining forces acting between the parts of the housing can be reduced, thereby simplifying the assembly process.

Abstract: A filter, especially a filter for lubricating oil of an internal combustion engine, including an inlet for the raw liquid and an outlet for the clean liquid. A filter insert (12) is arranged inside the filter, as well as a valve, such as a pressure relief valve (23). Parts of the valve are provided with coatings, for example hydrophobic coatings of polytetrafluoroethylene or silicone. The filter can also contain a heating element (34) in the vicinity of the valve.

Abstract: An air intake device for an internal combustion engine with crankcase ventilation in which crankcase gases are conducted via a duct structure (25) into the interior (18) of the air intake device (10). The duct structure ensures a quasi cylinder-selective feed through a plurality of feed inlets (27) into individual intake channels (20a). The duct structure is formed by the wall of the intake manifold and is sealed by a cover, so that the intake manifold can be produced cost-effectively. This construction has the advantage of ensuring uniform distribution of the crankcase gases among the cylinders while simultaneously enabling economically efficient manufacture.