Abstract: A filter device, especially for filtering the intake air of an internal combustion engine, which includes a housing with an unfiltered air inlet and a clean air outlet, and a substantially cylindrical, replaceable filter insert disposed in the housing, which separates an unfiltered air zone within the housing from a clean air zone. An axial seal is provided on at least one end disk of the cylindrical filter insert, which seal interacts with a sealing surface on the housing to seal the unfiltered air zone from the clean air zone. A clamping wedge is also provided, which exerts a force on the filter insert to urge the axial seal reliably against the sealing surface of the filter housing.

Abstract: An apparatus for storing water separated from fuels by a fuel filter is provided. The apparatus includes an absorber connected to a water accumulator of the fuel filter. The stored water may then be released again through heating or pressure using commercially available components and supplied to a further use.

Abstract: An intake head device for an internal combustion engine, which is suitable for impulse charging and/or residual exhaust gas purging, including a pressure accumulator (24) which may apply overpressure to the pressure passage via a pressure passage, so that this produces residual exhaust gas purging of the cylinder (16) when the inlet valve (18) is open and the impulse flap (21) is closed. The impulse charging is performed by a partial vacuum which is generated in the accumulator passage (22) by the air intake of the cylinder (16). The pressure accumulator arrangement of the invention has the advantage that the closing time of the flap (21) may be longer.

Abstract: An intake device for an internal combustion engine, comprising welded shells joined along a partition line, in which the partition line is provided with a region for producing inclined additional surfaces, which generate a transverse force Q2 due to their inclination relative to a pressure force D applied for welding the shells. This transverse force Q2 offsets a transverse force Q1 which is generated as a result of the inclination of partial regions of the partition line relative to the applied pressure force D. In this way, the transverse forces which arise during production of the intake device may be at least partially offset in the component, so that little or no forces are exerted on the molding tools, and the welding results for the intake pipe may thus be improved.

Abstract: A liquid filter, especially for oil of an internal combustion engine, with a bypass valve including a valve body 20 and a valve seat 21 integrated in an end plate 32 of the filter insert. A spring 22, which urges the bypass valve closed, is mounted in a support member 24 attached to the housing. Thus, parts of the bypass valve subject to wear and soiling can be replaced each time filter element 18 is replaced, and reliable operation of the bypass valve is assured throughout the life of the filter. The filter insert can be designed free of metal for easy disposability. The filter cartridge can also be used with known filter arrangements in which a permanent valve body is housed in the support member 24. When the filter element of the invention is used, this permanent valve body stays in the support member and functions as an intermediate piece 35, which transmits force between spring 22 and valve body 20. The valve function is assumed by new valve body 20 engaging valve seat 21.

Abstract: A filter system for the air intake of an internal combustion engine, in which an oval filter element is disposed in a housing, and a pre-separator is also provided which includes one or more cyclones.

Abstract: An intake system for an internal combustion engine of a motor vehicle, which includes a first air intake 10, which is arranged at a point in the motor vehicle that is advantageous for air intake, and a second air intake 11, which is arranged at a point that is protected from road spray and splashes of water. The two air intakes 10, 11 end in a common line 12 that communicates with the internal combustion engine. In the first air intake 10, a moisture sensor 14 is arranged. When water enters into the first air intake 10, this moisture sensor emits a signal that actuates a solenoid 23 to move a pivotable valve 13. In a first switching position pivotable valve 13 closes the second air intake 11 so that no air reaches line 12 from the second air intake 11. In a second position (shown in broken lines) pivotable valve 13 closes the first air intake 10 so that air reaches line 12 only through the second air intake 11.

Abstract: A housing configuration for a liquid filter in which the housing is cup-shaped and is produced by a molding technique. The housing lid or lid is secured to the housing (10) by a course of threads (28) which can be produced without forming any undercuts. This is achieved inside an area (30) around the mold parting plane (29) by providing recesses (31) on the course of threads in the horizontal areas. As a result, the thread can be produced directly on the housing by the initial molding technique without any post-molding processing measures, so that manufacturing costs are reduced.

Abstract: An adjustable intake pipe, especially for supplying combustion air to an internal combustion engine, which includes a collector chamber arranged in an essentially cylindrical control element. The collector chamber has a larger volume than required for the air supply, so the chamber is not used efficiently. In the invention, the collector chamber volume is used by arranging additional components of the intake tract defined by the intake pipe, i.e. of an internal combustion engine, within the collector chamber (11), for example, by arranging a resonance chamber (20) therein with the resonance chamber connected to the air supply system by through holes (19). This arrangement better utilizes the chamber volume and is particularly advantageous in motor vehicle engine compartments where limited space is available. The intake system also is more compact and has a lower overall weight.

Abstract: A liquid filter, especially including an oil filter cartridge (12) which is contained in a pot-shaped or cylindrical housing (10) with threaded cover (11), into which a cooler (13) is preferably installed. An outlet opening (37a) is contained in the oil cooler (13) which facilitates complete emptying of the cooler when the filter is changed. In this way, a complete replacement of the oil can be performed, so that the replaced oil is not contaminated from the outset by residues of the old oil. Thus, service intervals can be lengthened. To prevent a short circuit of the outlet opening (37a) during operation, the opening is closed by a valve stem (33) coupled to the threaded cover (11) and opened by unscrewing the cover.

Abstract: A drying agent box 10 which serves to remove moisture from air, especially for a compressed-air brake apparatus, and which comprises a housing 11 with at least one inlet 14 and at least one outlet 15, the housing 11 being formed by a container 12 and a flange 13. A drying agent body 18, which has a stable shape, is contained in the housing 11. Channels 22 may optionally be provided in the drying agent body for guiding the flow of air through the body. Different ways of installing the drying agent body 18 in the housing 11 also are described. Due to the stable shape of the drying agent body 18, the structure of the drying agent box is simplified because there is no need for components to hold a granular drying agent in place.

Abstract: A device for monitoring a processing liquid comprising at least one sensor for generating at least one monitoring signal, and a device for processing the monitoring signal and for generating a control signal for directly or indirectly influencing the composition or condition of the processing liquid. A device is also provided for detecting, storing, and maintaining the reliability of performance of the sensor. In addition, actuators are provided for converting given criteria or specified values.

Abstract: A method for filtering a liquid and an apparatus for carrying out the method in which at least one container is provided from which a filtering aid is fed to a dosing device by a delivery device, and the filter aid is supplied to an injecting container and/or to a filter element via the dosing device.

Abstract: A method of monitoring the operation of a free jet centrifuge installed in a fluid system, and a free jet centrifuge suitable for installation in such a system. The centrifuge (10) is provided with sensors, such as a piezoelectric sensor (22) and/or a rotational speed sensor (24), which enable determination of the operating parameters of the centrifuge rotor, such as accumulation of separated sediments, bearing wear, or other malfunctions independent of any axial force generated by the centrifuge nozzles (18). Signals are obtained, which can be evaluated by an electronic analysis system (23), and which can output an error signal (f).

Abstract: A suction tube with a switching element for longitudinal adjustment of different tube sections (16), particularly a suction tube having a drum switch (12). The invention provides for sealing strips (29) or sealing rings (17) which are supported inside the suction tube casing (14). This results in a relative movement between the drum switch (12) and the sealing elements fixed to the casing. The positioning of the sealing elements in the suction tube casing (14) is advantageous for assembly and allows for better compensation of tolerances in the sealing gap between the drum switch (12) and the suction tube casing (14).

Abstract: An air filter (10) for an internal combustion engine of a motor vehicle designed to transmit sound into the passenger compartment or driver area in order to inform the driver of the operating state of the engine. The air filter includes an air filter housing (11), a filter insert (26), an air inlet (12) for unfiltered air, and an air outlet (13) for filtered air. The air filter housing (11) includes a housing wall (22) in or on which at least one membrane (16) is mounted. The membrane (16) is made of a material which is more permeable to sound than the rest of the housing wall (22), so that the shape and position of the membrane can be used to achieve a desired sound generation and distribution.

Abstract: A filter including a housing made up of two housing shells in the form of mating cylindrical vessels (12, 12a) in one of which a support tube (17), especially a support tube having a conical shape, is integrated. A conical annular filter cartridge, preferably one having a resilient axial play compensating element (21) at one end, is installed on the support tube (17). The housing shells (12, 12a) are joined by a central screw connection (22), and sealing between the housing shells is effected by a labyrinth seal (14, 15). The filter is able to adapt to tolerance variations in the axial length of the individual components, so that productions costs are kept low. The housing shells (12, 12a) are constructed in such a way that they can be manufactured using simple casting molds with no undercuts.

Abstract: The invention relates to an intake system for an internal combustion engine of a motor vehicle for separating entrained water droplets. The intake system has an untreated air intake (10), an untreated air pipe (11) connected to said untreated air intake (10), and a water separator (12) adjoining said untreated air pipe (11). Inside the untreated air pipe (11) a swirl is produced to cause the aspirated air to rotate inside the untreated air pipe (11). The untreated air pipe (11) communicates with the internal combustion engine. The water separator (12) has an inner pipe (13) and an outer pipe (14), which are arranged coaxially to one another. The inner pipe (13) protrudes into the outer pipe (14), which is provided with a water outlet (20). Due to the coaxial construction of the water separator (12), the intake air flows into the downstream components without being diverted, so that no appreciable pressure losses are caused.

Abstract: A multicell cyclone with a plurality of cyclone cells and a method for the production thereof, in which the cyclone cells of the multicell cyclone are combined into groups from which deposited particles are cleaned out by vacuum suction through channel structures. This permits better control of the discharge of separated particles. Vacuum suction of the separated particles can be effected, for instance, via openings (19) which are jointly provided for the group (21) of cyclone cells. The group of cyclone cells can furthermore be produced as a module, which can, for instance, be assembled from two parts (12, 13) in which like structural elements of a group of cyclones are combined into one respective part. This makes it possible to optimize the separation result with little structural complexity and at low production cost.

Abstract: A combined air intake manifold and fuel delivery rail for an internal combustion engine which decreases manufacturing and assembly costs, as well as the weight of the engine. An air channel formed in a hollow portion of the manifold registers with air intake ports in the engine head which lead to the individual cylinders of the engine. An elongated recess in the underside of a mounting flange forms a fuel supply channel which communicates with fuel inlet openings in the engine head leading to fuel injectors for the engine cylinders. Seals may be provided between the manifold and the engine head to seal the air channel and the fuel supply channel.