Abstract: A heat exchanger (10) connectable with at least one connecting element (11). The heat exchanger is made up of a stacked structure and has holding devices (17) embodied as part of a heat exchanger housing. The holding devices can be produced by deforming an end plate (18) of the heat exchanger or they may be soldered on the end plate (18) in the form of profiled strips (24). The connecting element has corresponding locating elements (19), and assembly is carried out by deforming the holding devices (17) or by configuring the holding devices in the form of a bayonet lock. The integration of the holding devices (17) into the end plate (18) of the heat exchanger has the advantage of reducing manufacturing costs and simplifying assembly.

Abstract: An air intake system with resonance as well as ram charging. Ram charging is effected via intake ducts 15 and ram manifold 13, whereas resonance charging is effected by longitudinally adjustable resonance channels 12 and resonance manifold 11. The longitudinal adjustment of the resonance channels 12 is effected by rotatable control elements 22 driven by a motor 27, and the control elements 22 are accommodated in control housings 20 which communicate with the ram manifolds 13 via connecting ducts 34. The use of connecting ducts 34 allows a largely flexible arrangement of the control housings in relation to the intake manifold of the internal combustion engine. As a result the system can be advantageously and optimally adapted to the spatial characteristics within the engine compartment of a motor vehicle.

Abstract: A duct system with a throttle valve, particularly useful as an air intake duct for an internal combustion engine, in which the throttle valve is configured in such a way that in the closed position it covers only a partial region of the cross-sectional area of the duct which is to be throttled and leaves another partial region open so that air can continue to flow through the intake duct. This condition is suitable, particularly at low engine rotational speeds, to dampen the air intake noise of the internal combustion engine. When the throttle valve is positioned perpendicular to the direction of air flow through the duct, sound waves in the air intake duct of the internal combustion engine are reflected back toward the engine, and in this way an economical possibility for influencing the air intake noise results which also can be utilized to design a desired noise profile for the engine.

Abstract: A throttle device for liquid or gaseous media including a turbine which drives a compressor, a pump or a generator, and in which throttling of liquid or gaseous flow occurs by modifying the turbine load state.

Abstract: An intake system 10 which can be used for cooling a battery in a motor vehicle. This intake system 10 has a raw air inlet 11, a raw air duct 12, a filter housing 13, a filter element 14, a clean air outlet 15, a clean air duct 16 and an intake air manifold 17. The filter element 14 is placed in the filter housing 13 such that the air which flows from the raw air inlet 11 through the raw air duct 12 into the filter housing 13, must pass through the filter element 14 before it reaches the clean air duct 16 to the intake air manifold 17. The filter element 14 also has a curvature by which it at least partially follows the contour of a battery box wall 18 of an adjacent battery box 19. The filter element 14 can be made curved or in multiple parts.

Abstract: An air filter for an internal combustion engine having a housing (10) and a filter element (11) which is arranged in the housing. The housing (10) is provided with a filtered air outlet (15) and at least one untreated air inlet (16) with a screen (17) or a closable flap. An auxiliary untreated air inlet (18) which is closed by a flap valve (19) is also provided. The screen (17) or the flap of the untreated air inlet (16) opens when the temperature of the untreated air is above a certain threshold value and closes when the temperature of the untreated air is below a certain threshold value.

Abstract: A device for recirculating exhaust gases in an internal combustion engine, in which a predeterminable quantity of recirculated exhaust gas is introduced into the inlet port of the internal combustion engine downstream in the direction of flow from a throttle valve (2). A valve (8), such as fixed cycle valve, is inserted into the exhaust gas recirculating line (5) and allows the passage of exhaust gas and/or fresh air at a predetermined cycle/quantity ratio, thereby producing an air/exhaust gas mixture to b introduced into the engine inlet port.

Abstract: A liquid cooling system 10 for cooling liquids including a housing 11, a housing cover 12, and a liquid cooler 13. The housing 11 is sealingly fastened to the housing cover 12. The liquid cooler 13 is composed of cooling plates 19 stacked one on another. The cooling plates 19 sealingly separate a liquid space 20 from a coolant space 21. The coolant spaces 21 are connected by openings 26 which are disposed on projections 27 on the plates 19. In the housing 11 there is a liquid inlet 15, a liquid outlet 16, a coolant inlet 17 and a coolant outlet 18. The liquid inlet 15 leads into a housing volume 14 on an uncooled side 31 which is formed by the housing 11 and the liquid cooler 13. The uncooled side 31 lies opposite a cooled side 32 which communicates with a return passage 22 extending through the liquid cooler 13. The liquid inlet 15 is sealingly separated by a seal arrangement 25 from the coolant inlet 17 and coolant outlet 18.

Abstract: An intake manifold with an integrated exhaust gas recirculation system (16, 17a, 17b) which is located primarily within a plenum (12) of the intake manifold and is spaced at a distance (a) from the walls (20) of the intake manifold. This limits the heat transfer to the housing of the intake manifold, so that the housing may be manufactured, for example, of synthetic resin material. Further relief of the synthetic resin housing, particularly of the intake channels (14), from thermal stress is provided in that the intake air within the plenum cools the exhaust gas in the exhaust lines (17a, b), so that the intake-air/exhaust-gas mixture within the intake channels (14) does not exceed the critical temperature for the. synthetic resin walls (20) of the channels even if the exhaust gas recirculation rates are high.

Abstract: An air intake device for an internal combustion engine which includes at least one collection manifold and intake ducts branching off separately to individual cylinders of the internal combustion engine. The intake lines extend to the collection manifold and are formed at least partially of a flexible tube, especially a rubber tube. The intake lines furthermore have stiff or variable-length portions which are divided into at least two segments disposed for movement independently of one another.

Abstract: A filter with a planar filter insert which includes a device for the deflection of the fluid entering for filtration. Filters of this kind are particularly useful as air filters for the intake air of an internal combustion engine. The device for deflection onto the filter insert 12 is preferably realized by the cross-sectional profile of the inlet chamber 21a. As the hatched plane 26 in FIG. 2 shows, the profile has a curved portion a which leads to a deflection of the flow from an inlet 23 toward the filter insert. In comparison with wedge-shaped inlet chambers, a low pressure region on the filter element near the inlet, which would lead to an unequal distribution of filtrate on the filter element, can be prevented. In this way an optimum useful life of the filter element can be achieved, which is beneficial to the economics of the filtering operation.

Abstract: A sealing element particularly for sealing two parallel planar surfaces, which sealing element includes a supporting element with two or more catch or snap-fastening elements for connecting the support element to one of the planar surfaces by engaging mating areas; the sealing element also includes an elastomer element on each side of the support element facing the parallel surfaces such that each elastomer element creates a seal between the support element and a respective one of the parallel surfaces.

Abstract: Several filter elements (13, 14) for purifying a liquid are connected with a connecting piece (21) to form a single structural unit which is then arranged in a filter housing (12). One of the advantages of the invention is that the filter elements (13, 14) can be connected before they are introduced into the filter housing (12). This makes the final assembly of the complete filter (11) considerably easier by reducing the number of parts. The connecting piece (21) can also be used to separate a flow of liquid into two partial flows which can be filtered through different filter elements so that they differ in their degree of purity.

Abstract: An air induction device (11) for an internal combustion engine including an air filter housing (12) with an open induction tube (13) leading away from it and a supplementary induction tube (14) having a closing element, preferably in the area of its end opening (15). The closing element may take the form of a rotary flap (17) and is actuated depending on engine speed. The housing (12) and the induction tubes (13, 14) are configured in geometrical terms in such a way that at low engine rotational speeds, the housing (12) and the open induction tube (13) form a Helmholtz resonator, while the closed supplementary induction tube (14) forms a quarter-wave tube leading from the housing (12). At higher engine rotational speeds, the supplementary induction tube (14) is opened, and the overall length of the supplementary induction tube (14) is adapted so that at the higher speeds, it forms a Helmholtz resonator with the air filter housing (12) and the open induction tube (13).

Abstract: A device for cooling gases in which the gas to be cooled can be fed through channels (5) of a cooling device (1). Adjacent the gas channels (5) in the cooling device (1) are coolant channels (10) for a circulating coolant. In the cooling device, the channels (10) for the coolant are positioned centrally in the interior and the channels (5) for the gas to be cooled are positioned radially outwardly.

Abstract: A module (13a) for the lubricating oil circuit of an internal combustion engine or some other type of working machine is proposed, which comprises at least an oil supply (14) that can be exchanged or replaced together with the unit (13a). Valves (24) prevent oil from flowing out of the unit during the exchange. This enables a reliable oil change to be achieved. The module can be equipped with additional functional elements such as a filter element (23), an oil pump (26), a supplemental centrifuge (29), an additive reservoir (31) and/or various sensors (S1, S2).

Abstract: An air intake device (10) especially adapted for use with an internal combustion engine, which achieves longer air intake tubes using a very simple geometry and which directly guides aspirated air without sharp deflections. The air intake device comprises a manifold (11), intake tubes (12), and an adjusting unit (13). The manifold (11) and the adjusting unit (13) form air intake channels (14), each leading into an air intake tube. The air intake channels (14) are arranged in a “cloverleaf” about the adjusting unit (13). To achieve an optimum charging of the cylinders of an internal combustion engine in all speed ranges, the adjusting unit (13) is steplessly or continuously adjustable. To establish preferred settings, rotary or sliding sleeves with interruptions can be integrated into the air intake device.

Abstract: A free jet centrifuge, especially for cleaning the lubricating oil of an internal combustion engine. The aim of the invention is to provide a centrifuge which is economical to manufacture and at the same time allows for high speeds. To this end on one side of the rotor a ball bearing (16) is provided in the housing which engages a closed stub shaft (14) of the rotor. In the area of this bearing the rotor is sealed so that friction in the ball bearing is not increased by the oil pressure in the centrifuge. A friction bearing is provided for the other side of the rotor which is composed of a slide bushing (20) and a bearing bushing (21). In this way a combination of materials which is optimal in terms of tribological properties can be selected. A hollow nipple shaft (19) which acts as an oil inlet (24) for the centrifuge rotor is inserted into the slide bushing (20). To increase speed even further, the invention provides for an impulse channel (30) which discharges through nozzles (31).

Abstract: A separating device for coolants or lubricants, containing chips, is described. This is provided with a supply line (11), a container (10) as well as a pump (20), which is connected with the container (10). The pressure side of the pump is connected with a discharge line (28). The pump, in particular, is an unchokable pump. A device (13), for comminuting the chips supplied, is disposed in the container (10).

Abstract: The invention relates to a silencer. The silencer includes a sound conducting channel having two ends. An injection molded part is arranged between the two ends of the sound conducting channel and includes a plurality of pipe elements. A shunt resonator is arranged in fluid communication with the sound conducting channel by way of openings formed in the plurality of pipe elements. The shunt resonator defines a volume formed by two housing parts which are joined together. By varying the number, position, length and diameter of the pipe elements in the silencer, the silencer is capable of achieving silencing gains in different frequency ranges.