Abstract: A method to determine at least one filter operating parameter. At least one transponder arranged on or in a filter cartridge of the filter is contactlessly queried by a reading device. A transponder response is analyzed to evaluate the operating parameter. The transponder is subject to influences acting on the filter cartridge. As a result of the influences that the transponder is sensitive to, or sensitivity on transparency or damping properties of a transmission path of electronic signals between the transponder and the reading device, a transponder response behavior is changed to a degree detectable by the reading device or a downstream analysis unit which enables a statement to be made about the operating parameter. A device for determining at least one operating parameter of a filter or a filter cartridge arranged on or in the filter, and a filter cartridge are both provided.

Abstract: The invention relates to a filter arrangement comprising a filter cartridge, having an opening and a wall which is formed by a filter medium and has an inner side delimiting a clean side of the filter and an outer side delimiting a raw side of the filter, a fan for conveying air to be purified first through the wall and subsequently through the opening of the filter cartridge, and a purification device, which is configured to convey a jet of compressed air through the opening into the filter cartridge and through the out of the filter cartridge, for conveying dirt away from an outer wall of the wall. The invention also relates to a method for detecting a leak of a filter cartridge, wherein the filter cartridge has an opening and a wall which is formed by a filter medium and has an inner side delimiting a clean side of the filter and an outer side delimiting a raw side of the filter.

Abstract: A filter material for a filter insert of a fuel filter for separating solid particles and water droplets from fuel. The filter material comprises a particle filter medium layer through which the fuel flows first during use and at least one coalescer medium layer which lies on the particle filter medium layer on the outflow side. At least one coalescer medium layer is gradient-free in the flow direction with respect to the geometrical structure and/or physical properties and/or chemical properties of the layers. The at least one coalescer medium layer has a thickness measured in the flow direction which is maximally as large as the thickness of the particle filter medium layer measured in the flow direction.

Abstract: A filter material for a filter insert of a fuel filter for separating solid particles and water droplets from fuel. The filter material comprises a particle filter medium layer through which the fuel flows first during use and at least one coalescer medium layer which lies on the particle filter medium layer on the outflow side. At least one coalescer medium layer is gradient-free in the flow direction with respect to the geometrical structure and/or physical properties and/or chemical properties of the layers. The at least one coalescer medium layer has a thickness measured in the flow direction which is maximally as large as the thickness of the particle filter medium layer measured in the flow direction.

Abstract: The invention relates to an oil mist separator of an internal combustion engine, comprising at least one gas-permeable diffusion separation body, through which a crankcase ventilation gas of the internal combustion engine can flow and in which oil mist present in the crankcase ventilation gas can be separated from the gas. The novel oil mist separator is characterized in that in the or each diffusion separation body additionally continuous free gas channels are formed, and that, viewed in the flow direction of the crankcase ventilation gas, behind the gas channels at least one further diffusion separation body, or an impingement separation surface is disposed at a distance from the or each diffusion separation body.

Abstract: A device for eliminating oil particles from the crankcase ventilation gas of an internal combustion engine. The device is located in the flow duct of the gas that runs from the crankcase to an induction tract of the engine. The device includes an oil separator in the form of an outlet for the gas with a deflection of the flow, causing the oil particles to be deposited on a baffle surface and thus to be eliminated from the crankcase ventilation gas flow. The device has an infeed cross-section, which lies upstream of the baffle surface when viewed from the flow direction of the crankcase ventilation gas, and which is sub-divided into several infeed sub-sections. The baffle surface is a solid surface that is devoid of perforations. The baffle surface is configured on a valve body, which lies downstream of the infeed sub-sections when viewed in the flow direction of the gas, and which is pre-tensioned by a force.

Abstract: The invention relates to an oil mist separator of an internal combustion engine, comprising at least one gas-permeable diffusion separation body, through which a crankcase ventilation gas of the internal combustion engine can flow and in which oil mist present in the crankcase ventilation gas can be separated from the gas. The novel oil mist separator is characterized in that in the or each diffusion separation body additionally continuous free gas channels are formed, and that, viewed in the flow direction of the crankcase ventilation gas, behind the gas channels at least one further diffusion separation body, or an impingement separation surface is disposed at a distance from the or each diffusion separation body.

Abstract: A device for eliminating oil particles from the crankcase ventilation gas of an internal combustion engine. The device is located in the flow duct of the gas that runs from the crankcase to an induction tract of the engine. The device includes an oil separator in the form of an outlet for the gas with a deflection of the flow, causing the oil particles to be deposited on a baffle surface and thus to be eliminated from the crankcase ventilation gas flow. The device has an infeed cross-section, which lies upstream of the baffle surface when viewed from the flow direction of the crankcase ventilation gas, and which is sub-divided into several infeed sub-sections. The baffle surface is a solid surface that is devoid of perforations. The baffle surface is configured on a valve body, which lies downstream of the infeed sub-sections when viewed in the flow direction of the gas, and which is pre-tensioned by a force.

Abstract: The invention relates to an oil separator for the separation of oil from the crankcase ventilation gas of an internal combustion engine, comprising a housing wherein a separating element is arranged, comprising an inlet for gas to be cleaned, an outlet for cleaned gas and an outlet for separated oil. The novel oil separator is characterized by a crude gas area of the housing adjacent to the inlet and provided with an oil sink wherein coarse oil carried by the incoming gas flow is deposited; also characterized in that the oil separator comprises, in addition to the separating element, a coarse oil cyclone whose inflow opening is located at the same level as the oil sink therein, and in that the separating element has an inflow opening which is spatially located above the inflow opening of the coarse oil cyclone.

Abstract: The invention relates to a device (1), for the ventilation of the crankcase (20) of an internal combustion engine (2), with a breather tube (3), running from the crankcase (20) to an inlet manifold (22) on the internal combustion engine (2), in the course of which an oil-mist separator (30) is arranged. The novel device is characterized in that in the course of the breather line (3), a pump device is arranged, by means of which a reduced pressure may be generated in the crankcase (20) relative to ambient pressure.

Abstract: The invention relates to an oil separator for the separation of oil from the crankcase ventilation gas of an internal combustion engine, comprising a housing wherein a separating element is arranged, comprising an inlet for gas to be cleaned, an outlet for cleaned gas and an outlet for separated oil. The novel oil separator is characterized by a crude gas area of the housing adjacent to the inlet and provided with an oil sink wherein coarse oil carried by the incoming gas flow is deposited; also characterized in that the oil separator comprises, in addition to the separating element, a coarse oil cyclone whose inflow opening is located at the same level as the oil sink therein, and in that the separating element has an inflow opening which is spatially located above the inflow opening of the coarse oil cyclone.

Abstract: The invention relates to a device for crankcase ventilation of an internal combustion engine, comprising a ventilation duct extending from the crankcase to an induction tract of the internal combustion engine, whereby at least one oil vapor separator causing a drop in pressure is arranged in said duct and a crankcase vacuum control valve is arranged upstream or downstream therefrom and can be adjusted according to the pressure in the crankcase such that a lower pressure threshold valve in the crankcase is respected. The novel device is characterized in that a discharge duct extending from the crankcase to the induction tract of the internal combustion engine is also provided, whereby a crankcase overpressure limiting valve is disposed inside said duct and can be adjusted in a pressure-dependent manner to ensure that an upper pressure threshold in the crankcase is not exceeded.

Abstract: The invention relates to a device for crankcase ventilation of an internal combustion engine, comprising a ventilation duct extending from the crankcase to an induction tract of the internal combustion engine, whereby at least one oil vapor separator causing a drop in pressure is arranged in said duct and a crankcase vacuum control valve is arranged upstream or downstream therefrom and can be adjusted according to the pressure in the crankcase such that a lower pressure threshold valve in the crankcase is respected. The novel device is characterized in that a discharge duct extending from the crankcase to the induction tract of the internal combustion engine is also provided, whereby a crankcase overpressure limiting valve is disposed inside said duct and can be adjusted in a pressure-dependent manner to ensure that an upper pressure threshold in the crankcase is not exceeded.

Abstract: The invention relates to a device (1), for the ventilation of the crankcase (20) of an internal combustion engine (2), with a breather tube (3), running from the crankcase (20) to an inlet manifold (22) on the internal combustion engine (2), in the course of which an oil-mist separator (30) is arranged. The novel device is characterised in that in the course of the breather line (3), a pump device is arranged, by means of which a reduced pressure may be generated in the crankcase (20) relative to ambient pressure.

Abstract: The invention relates to a method for de-oiling crankcase ventilation gases of an internal combustion engine wherein an oil separating element, like a cyclone has crankcase ventilation gases flowing therethrough, and the oil droplets contained therein are separated. The method provides that the volume stream of the crankcase ventilation gases is divided in at least two partial volume streams, and at least one partial volume stream is guided through at least one oil separating element, wherein the magnitude of the at least two partial volume streams is controlled depending on the magnitude of the volume stream. Furthermore the invention relates to apparatus for accomplishing the method.

Abstract: The invention relates to an oil separator for de-oiling crankcase ventilation gases of an internal combustion engine wherein the oil separator (1) comprises at least one cyclone encompassing a gas inlet connected to the crankcase of the internal combustion engine, a gas outlet connected to the air suction passage of the internal combustion engine, and an oil outlet connected to the crankcase sump of the internal combustion engine wherein the gas outlet, as a submerged pipe projects through a lid into the cyclone interior with the lid closing the cyclone at the top. The novel oil separator has a gas duct section which is provided above the gas outlet on top of the lid with the gas duct section comprising a cross-section horizontally enlarged to at least double size, and an oil drain passage is guided from this section downwards to the oil outlet or the crankcase sump.

Abstract: A device to deoil crankcase ventilation gases of an internal combustion engine with at least one oil mist separator is provided which has a gas inlet connected to a first pressure area and is directly or indirectly connected to the crankcase of the engine. The separator also has a gas outlet connected to a second pressure area and is directly or indirectly connected to the air intake section of the engine and an oil outlet connected to the oil sump of the engine. The separator further has a bypass channel, which has a gas inlet connected to the first pressure area and a gas outlet connected to the second pressure area as well as at least one device which, depending on the pressure difference between the two pressure areas, opens or closes the bypass channel continuous or gradually to allow the crankcase ventilation gases to flow through.

Abstract: A device to deoil crankcase ventilation gases of an internal combustion engine with at least one oil mist separator is provided which has a gas inlet connected to a first pressure area and is directly or indirectly connected to the crankcase of the engine. The separator also has a gas outlet connected to a second pressure area and is directly or indirectly connected to the air intake section of the engine and an oil outlet connected to the oil sump of the engine. The separator further has a bypass channel, which has a gas inlet connected to the first pressure area and a gas outlet connected to the second pressure area as well as at least one device which, depending on the pressure difference between the two pressure areas, opens or closes the bypass channel continuous or gradually to allow the crankcase ventilation gases to flow through.

Abstract: The invention relates to an oil separator (1) for de-oiling crankcase ventilation gases of an internal combustion engine with the oil separator (1) comprising a cyclone encompassing a gas inlet connected to the crankcase of the internal combustion engine, a gas outlet connected to the suction passage of the internal combustion engine, and an oil outlet connected to a crankcase sump of the internal combustion engine. The novel oil separator is characterized in that instead of a single cyclone several smaller cyclones (11, 12, 13, 14) are provided arranged in parallel with each other.