Abstract: A gas supply and discharge system may have a fuel cell arrangement having at least one electrode, a gas-gas heat exchanger for exchanging heat between a first gas to be supplied to the electrode and a second gas discharged or dischargeable from the second electrode, and a humidifier for transferring humidity between the first gas and the second gas. The first gas to be supplied to the electrode can be introduced into the gas-gas heat exchanger before the supply of the first gas to the electrode, and such that the second gas can be introduced into the gas-gas heat exchanger from the electrode in order to transfer heat between the first gas and the second gas in the gas-gas heat exchanger. The first gas and the second gas can be introduced into the humidifier from the gas-gas heat exchanger in order to transfer humidity between the first gas and the second gas in the humidifier. The first gas can be introduced into the fuel cell arrangement from the humidifier and can be supplied to the electrode.

Abstract: An electrochemical system has at least one endplate, a terminal bipolar plate as well as a sealing device arranged between the endplate and the terminal bipolar plate. The materials of the terminal bipolar plate and the endplate have different coefficients of thermal expansion and with the sealing device being designed in such a way that during temperature changes, the sealing function is also given by a sliding of the endplate and/or the terminal bipolar plate along the sealing device.

Abstract: An electrochemical system is described having an end plate, a stack cover plate adjacent to the end plate and at least one metallic electrical conductor. The stack cover plate has an electrically conductive contacting plate adjacent to the end plate and an electrically conductive separator plate half facing away from the end plate. The contacting plate and the separator plate half are connected to each other electrically and media-tight. The metallic electrical conductor extends to an outside of the electrochemical system. The metallic electrical conductor and the contacting plate are in one piece or the metallic electrical conductor contacts the contacting plate directly. The contacting plate and the separator plate half are bonded to each other.

Abstract: A liquid separation device for the separation of liquid or liquid mist from a gas, with at least one pair of basic carriers being a first and a second plate-shaped basic carrier, where in each of the first and the second basic carrier, at least two separator elements are formed. The separator elements each have a passage pipe with a gas inlet and a gas outlet, which are arranged at opposite sides of the respective plate-shaped basic carrier in such a way that the passage pipe extends through the respective plate-shaped basic carrier. The first and the second basic carrier being arranged one next to the other in flow direction of the gas. Each of the two separator elements in both basic carriers in which the separator elements are arranged adjacent to each other, with their passage pipes form continuous flow paths for the gas.

Abstract: A metallic flat gasket with at least one metallic layer and at least one filter element. The at least one metallic layer has at least one passage opening, which is covered by the filter element. The filter element has a mesh material.

Abstract: The application relates to a water transfer compound, preferably for use for the humidification of process gases for fuel cells, comprising:—a water-permeable and essentially gas-impermeable water transfer layer as well as—at least one thermoplastic protection layer which is water- and gas-permeable at least in sections, where—the water transfer layer and the thermoplastic protection layer overlap each other at least in sections and comprise a first and a second overlapping area, where—the water transfer layer in the first overlapping area is accessible for humid gases through the thermoplastic protection layer and the water transfer compound is thermocompressed in the second overlapping area so that the water transfer layer in the second overlapping area is not accessible for humid gases through the compressed thermoplastic protection layer.

Abstract: A metallic plate for an electrochemical system is provided. The plate has at least one measuring structure formed in one piece with the plate. The measuring structure has at least two cuts through the plate and a first deformation of the plate arranged between the cuts. The cut edges are spaced apart from one another in sections by the first deformation so that the cut edges form at least two windows in the plate. The measuring structure has at least a second deformation of the plate. The plate is deformed by the second deformation in the region of the plate adjacent to the windows in such a manner that the windows allow light that falls on the plate orthogonally to the main plane of the plate to pass through. As described is a method of producing a metallic plate including at least one measuring structure.

Abstract: A ventilation system for the ventilation and for the aeration of an internal combustion engine is described and depicted. The ventilation system may have an intake pipe and a supercharger in the intake pipe, and an air-oil separator for the separation of oil and/or oil mist from blow-by gases with at least one inlet and at least one outlet.

Abstract: A rotor-type apparatus for centrifugal cleaning of crankcase gases from a combustion engine. The rotor is hydraulically driven by pressurized oil by means of a turbine wheel located in an oil collection chamber. A pressure equalizing and gas discharging conduit, which extends into the collection chamber and has an upper aperture located above a liquid level of the oil in the collection chamber during the operation, is connected to an outlet conduit for the propellant oil from the collection chamber.

Abstract: A ventilation system for a crankcase for the transport of blow-by gases from the crankcase to the intake section of an internal combustion engine with supercharger. A ventilation line reaches from the crankcase to the segment of the intake section between the supercharger and the air inlet valve. An air-oil separator is arranged in the ventilation line, as well as a return line for the return of oil separated in the air-oil separator via a tank and a tank outlet valve into the crankcase. An actuating element is arranged in or at the tank. The actuating element is charged with the pressure in the intake line behind the supercharger as working pressure and which upon sufficiently high pressure transports the oil present in the tank via the tank outlet valve into the crankcase.

Abstract: A flat gasket with at least one extended carrier layer is described. Such flat gaskets are for instance used as transmission plates or also as cylinder head gaskets. They are also used in the area of the exhaust line of a combustion engine. The at least one extended carrier layer has a first surface and a second surface opposite to the first surface. The layer also has a passage opening for a fluid which penetrates the carrier layer. The circumferential edge of each of the two surfaces has one or several projections which encircle the passage opening at least in sections and protrude into the passage opening. A functional element is arranged in the passage opening, which is held by the one or several projections in the passage opening.

Abstract: The invention relates to a sealing system consisting of a first part and a second part and at least a passage opening extending in both parts, in particular a passage opening for fluids such as hot combustion gases from combustion engines as well as a corresponding metallic flat gasket such that the sealing system comprises or consists of a first part and a second part with the first part and the second part being compressed against each other at a joint contact surface and comprising at least one passage opening in the contact surface, which protrudes into the first and/or second part, an annular groove, which is delimited by the first and the second part and which encircles the passage opening, with the first and second part in the area at least radially outside of the groove come to rest one on the other.

Abstract: The present invention relates to a control plate as it is for instance used in pneumatic or hydraulic controls. An example of such a control plate is a transmission control plate with which automatic transmissions are controlled hydraulically.

Abstract: A separator plate for an electrochemical system has two metal individual plates. The plates have passage openings for operating media and possibly coolant, and distribution structures. The distribution structures are formed in the metal individual plates and which each communicate with at least two of the passage openings. A peripherally extending sealing structure is formed in each of the metal individual plates at least peripherally around the electrochemically active region and at a distance therefrom and/or peripherally around at least one of the passage openings and at a distance from the edge thereof. The cross-section of the sealing structure has a bead roof, two bead flanks, and at least in some segments, two bead feet. At least in the region of the bead roof of the sealing structure at least in some segments, the sealing structure extends sinuously with at least two wave periods having convex and concave segments.

Abstract: The invention relates to a cover assembly for covering of a cylinder head with a lid, a frame and at least one air-oil separator, as well as the use of such a cover assembly as an enclosure for at least one cylinder head of a combustion engine of a vehicle or a combustion engine for stationary use.

Abstract: The present invention relates to a heat shield for shielding of hot areas, such as hot areas of a combustion engine as well as a part that is shielded with such a heat shield. The heat shield for shielding of hot areas, e. g. of a combustion engine, with at least one metal sheet layer, characterized in that the insulating layer comprises a metallic grid, which is embedded into a fiber mat.

Abstract: The invention relates to a flat seal such as those that are used in motor vehicle construction in particular. Such flat seals can be used for example as seals in the exhaust tract of internal combustion engines, as cylinder head gaskets, or also as hydraulic system control plates. Hydraulic system control plates, such as transmission control plates for example, always have a sealing function in addition to a fluid control function simultaneously.

Abstract: A heat shield for shielding of hot areas of a combustion engine. The heat shield has at least one metal sheet layer with a first and a second surface. The at least one metal sheet layer has at least one passage opening for the passage of a fastening element. The layer also has a sleeve which passes through the passage opening. The heat shield further has a decoupling element from flexible material arranged between a circumferential edge of the passage opening and the sleeve. The decoupling element and the sleeve each have a) an annular shank area, which penetrates the passage opening, b) a first collar, which on the first surface extends radially outward relative to the circumferential edge of the passage opening, and c) a second collar, which extends adjacent to the second surface radially outward relative to the circumferential edge of the passage opening.

Abstract: A liquid separation device for the separation of liquid or liquid mist from a gas, with at least one pair of basic carriers being a first and a second plate-shaped basic carrier, where in each of the first and the second basic carrier, at least two separator elements are formed. The separator elements each have a passage pipe with a gas inlet and a gas outlet, which are arranged at opposite sides of the respective plate-shaped basic carrier in such a way that the passage pipe extends through the respective plate-shaped basic carrier. The first and the second basic carrier being arranged one next to the other in flow direction of the gas. Each of the two separator elements in both basic carriers in which the separator elements are arranged adjacent to each other, with their passage pipes form continuous flow paths for the gas.

Abstract: An electrochemical system has at least one endplate, a terminal bipolar plate as well as a sealing device arranged between the endplate and the terminal bipolar plate. The materials of the terminal bipolar plate and the endplate have different coefficients of thermal expansion and with the sealing device being designed in such a way that during temperature changes, the sealing function is also given by a sliding of the endplate and/or the terminal bipolar plate along the sealing device.