Abstract: A system for recirculating exhaust gas in an internal combustion engine in which a connecting line for the recirculated exhaust gas is connected to an air intake tube with cooling elements arranged in between. The cooling element may be, for example, a cooling channel for liquid coolant integrated into the flange connecting the connecting line to the air intake tube, or it may be another heat conductive element.

Abstract: A suction pipe for the intake air of an internal combustion engine, which has a pressure relieving site in the form a bursting geometry 15 for backfiring impacts in the suction pipe. In the event of backfiring, the sites of weakness 17, 18, 24 fail and the bursting geometry is flung into the buffer volume 14, 14a, as a result of which the energy of the backfiring pressure wave is dissipated. As a result, further damage to the suction pipe is prevented, so that the emergency running properties of the internal combustion engine are retained. The proposed pressure-relieving sites have a high functional reliability, independently of the operating state of the internal combustion engine, particularly of the operating temperature.

Abstract: An intake module for an internal combustion engine. The intake module including at least two intake ducts which can be opened and closed by rotatable valves. The valves are connected to one another via a coupling mechanism and to a common actuating mechanism in the form of a servomotor. In order to compensate for tolerances between the valves and the actuating mechanism, the coupling mechanism includes at least one elastic portion, formed by a weakened material portion, which allows the intake valves to be closed and opened completely. The resilience of the coupling mechanism can be brought about by a change in cross-section or a material reduction. In one embodiment of the invention, the coupling mechanism includes multi-part articulated main rods which control the valves by resiliently mounted legs.

Abstract: An apparatus for separating liquids, in particular water, from gasses, in particular for separating entrained water from the intake air of an internal combustion engine. This is achieved by appropriately configuring a selected connection site in the intake section which precedes the air filter of the internal combustion engine. This has the advantage of requiring no parts in addition to the air conduit pieces already present. Separated water may be discharged, for example, through an outlet valve or small opening.

Abstract: A filter element for an air filter, including a filter insert (2; 8; 10) and a seal (6) extending around the outer edges of the filter insert on the flat side thereof; the filter insert being folded in a zig-zag or pleated form and being composed of filter paper or filter fabric. The filter element (1; 7; 9; 10) rests against parts of a filter housing through the seal (6). The folded filter insert has a contour on one side which deviates extensively from a plane, at least in certain predetermined areas, thus creating a continuous zig-zag fold.

Abstract: A device for separating liquid particles from a gas stream including a filter insert (8, 9, 11) placed in a gas stream (3) generated by an external pressure difference. Liquid particles remain on the outer surface of the filter insert (8, 9, 11) on the raw gas side and form droplets which can flow down into a collecting chamber (6). The device is a compact separating module (1) with several stages, a cyclone (5), a filter insert (8, 9, 11) and a pressure regulating valve (12).

Abstract: A housing, in particular a pot-shaped filter housing. To connect housing pot 10 and cover 11, a joint consisting of closure elements such as locking clamps or bow clamps 16 is proposed which can be attached at the periphery of the housing via receivers 18. As there are more receivers 18 provided on the housing than locking clamps 16 which are required for absorbing retention forces, it is possible to vary the exact fitting position of the locking clamps according to the respective space available for receiving and mounting the housing. This is essential, because the rotating radius 27 of the tension levers 17 of the locking clamps has to be considered when mounting the locking clamps 16. It is thus possible to provide housings for any field of use with variable receivers for the closure elements.

Abstract: An apparatus and method for producing a zig-zag folded filter element from a web of material (18), which is supplied through a feeding device to a stamping unit (10). To define the folding line, the stamping unit is fitted with an anvil roll (21) and a stamping die (24), the stamping unit being ultrasound activated and thereby improving the stamping operation.

Abstract: A flange for a device for separating an oil aerosol from air. This flange consists of a rubber-coated sheet metal and has the purpose of providing a seal between a housing and a mounting plate.

Abstract: A fastening element for a plastic housing, especially a filter housing, which is fitted to a supporting structure so as to damp vibrations. To this end the housing is provided with the fastening element comprising a rubber-elastic member (12), especially a member produced by the two-component injection molding method, and a mounting member of the support structure is lockingly engaged with the fastening element so that the fastening element of the housing is functionally connected to the supporting structure.

Abstract: A process for manufacturing hollow synthetic resin bodies or objects in which cores are produced in casting molds, then placed into molds of injection molding machines, and subsequently enveloped with injected synthetic resin material (35) which then solidifies. The molds are then heated up to a temperature at which the cores melt and at which the molten cores can be removed from the molds. The cores are made of shell halves (32, 33) which are assembled before the synthetic resin material (35) is injection molded around them.

Abstract: The invention concerns an oil pump module (11) for assembling in one structural unit, an oil pump (18), an oil cooler (37) and an oil filter (43). Said module has a base element (12) capable of being produced in the form of a plastic housing. An oil pump (18) is inserted from one side and, from the other side, an oil cooler (37) and an oil filter (43). Moreover, the oil pump (18) is sealingly pressed, by the base element (12), against an internal combustion engine frame, so as to be driven by said engine. The invention enables to obtain not only a particularly compact and light oil pump module (11), but also an entire pre-assembled unit, with complete module control at the supplier's.

Abstract: An apparatus for forming a helical tube (18), including a first stamping station for producing a flange on a metal strip (11), a forming tool (17) in which the flanged metal strip is formed to a helical configuration and adjacent side edges are crimped together to produce a tube, a cutting arrangement (19) which cuts the tube into predetermined lengths, and a mechanical-optoelectronic measuring arrangement (20) for determining the length of the helical tube (18) to be cut.

Abstract: A filter comprising a housing, which consists of at least two housing parts, and a filter element attached inside the housing. The invention provides for at least one latch element by means of which a detachable latched connection can be established between the filter element and at least one of the housing parts.

Abstract: The invention relates to an intake pipe for the intake air of an internal combustion engine. The intake pipe comprises a shift drum which provides continuous adjustment of the intake pipe length. The intake pipe comprises a housing constructed of individual disks which are joined in a sealing manner via ring grooves. The shift drum is preferably made of regulator disks so that it can be assembled without difficulty by alternately sliding a housing disk and a regulator disk on to the drive shaft. The intake channels are sealed by means of sealing lips which are joined to the regulator disks, for example by injection, and are axially supported on annular ribs forming part of the housing disks. This makes it possible to compensate for the tolerances of all of the components. Apart form being easier to assemble, an intake pipe constructed in the above manner also has a lower weight since no inserts are required to configure and seal the individual intake channels.

Abstract: A valve (1, 8, 14) having a valve body (2) that is pressed against a valve seat (5, 11) by the pressure of a valve spring (3) supported against a valve cap (4, 10). The valve is held together in the area of the valve seat (5, 11) by an enclosure member (7, 9, 15) coated with an elastomer, and the enclosure member (9, 15) can also form the valve plate or seat.

Abstract: The invention concerns a filter insert for separating oil out of a flow of gas; the filter insert (1) comprising a pure gas side (2) and an untreated gas side (3) as well as support means (4) and at least two separation zones (5; 6) of different degrees of fineness.

Abstract: The invention concerns an intake system, in particular an intake pipe of thermoplastic plastics for the intake air of an internal combustion engine with in particular cylinder rows arranged in a V-shape. The intake system comprises at least two elements (10, 14), the first element (10) having a substantially closed shape and simultaneously forming the lower half-shell of the intake pipes. The second element (14) is designed as the upper half-shell of the intake pipes and is connected to the first element (10) by the plastics welding technique.

Abstract: An air filter, especially for the intake air of an internal combustion engine, including a housing (10) with a filter insert (17). The housing includes a raw air inlet (11) and a clean air outlet (12), as well as an opening (13) for introduction of the filter insert (17). The filter insert (17) is included of a supporting element (18) and a filter element (19) and can be positioned in contact with a sealing surface with a sealing element or gasket (15) interposed therebetween. The housing (10) includes a supporting element (16) for the filter insert (17), and the filter insert (17) can rock or pivot relative to the supporting element (16) and reaches its final position through such a pivoting or swiveling movement.

Abstract: A filter assembly for a liquid to be filtered, especially for use in a conditioning unit for the lubricating oil of a motor vehicle, including a filter cartridge (8) concentrically arranged around a center tube (9) through which a liquid stream may flow. The filter assembly includes a bypass valve (11) through which unfiltered liquid can flow into the center tube (9) if the filter cartridge becomes clogged. The bypass valve (11) is durably affixed by a valve plate (21) so that a valve body (16) is urged against the valve plate (21) by a valve spring (19) supported by supports (20) extending axially in the center tube (9).