Hydac Filtertechnik Gmbh

Hydac Fluidcarecenter Gmbh

Richard Eberle

Micha Kreibig

Matthias Schwender

Harald Mees

Markus Dewes

Thomas Scholl

Jonas Haupenthal

Sven Brall

Florian Hoffmann

A delivery device for the fuel of an internal combustion engine has a fuel tank () from which at least one fuel pump () delivers fuel via a fuel supply line () and via at least one fuel filter () to a fuel consumer (). The consumer () is connected to the fuel tank () via a fuel return line (). A control device () is connected between the supply line () and the return line (). The control device establishes a fuel-conveying connection () between the return line () and the supply line () when the temperature in the fuel tank () falls below a predeterminable threshold temperature and at a predeterminable threshold pressure in the return line ().

Delivery device for the fuel of an internal combustion engine

A filter device, in particular for fluids polluted with admixtures of water, such as diesel oil, includes a filter housing () having a fluid inlet (), a fluid outlet () and a filter element (). During the filtering process, the fluid can flow through the filter medium () of the filter element from the unfiltered side () to the filtered side () of the filter medium and into its inner filter cavity (). On at least one side of the filter medium (), a water-separating system () has a separating region () for separated water. The water separating system is connected via at least one water opening () that is open toward the separating region () to a water collecting chamber (). The filter element () has a passage () forming a fluid connection to the inner filter cavity () and can be connected to an element receptacle () of the filter housing (). A fluid-conveying system () forms fluid paths separated from each other. The first fluid path () leads from the fluid inlet () of the housing () to the unfiltered side () of the filter element (). The second fluid path () connects the respective water opening () to the water collecting chamber ().

Filter device and filter element provided therefor

A filter device for filtering fluids such as fuels, including diesel fuel, has a filter housing (), within which a filter element () can be fastened and exchanged. The filter element has a filter medium that surrounds an inner filter cavity (). A fluid inlet leads to the unfiltered side () of the filter element (). A fluid outlet outflows filtered fluid from the filtered side (). An equalizing tube () extends in the filter housing () up to a maximum filling level height for the filtration operation. The equalizing tube is connected to a tank return connection at a lower end of the equalizing tube and is open at an upper end () of the equalizing tube. The tube () has, at distances from the upper and lower ends of the tube, an inner control part () with a passage opening () forming a throttle point.

Filter device

A filter device for fluids with a fluid inlet () and a fluid outlet (). A filter element () is enclosed by an end cap () on its lower end facing a bottom part () of the filter housing (). The end cap has a passage () forming a fluid connection to the filter element inner filter cavity () and can be fixed to an element retainer () of the filter housing (). The element retainer () includes a retaining piece () open towards the filter element () with a fluid channel () leading to a housing connection (). The end cap () has a connecting piece () in the retaining piece (). The retaining piece () forms an opening () connected to the fluid channel () leading to the element retainer (). A sealing () seals the opening from the open end of the retaining piece.

Filter device with releasably securable end cap and sealing arrangement

A filter, in particular for fluids polluted by admixtures of water, such as diesel oil, includes a filter housing () receiving at least one filter element (). During the filtering process, fluid can flow through the filter medium () from the outer unfiltered side () of the filter element into an inner filter cavity () forming the filtered side (). A water passage () inside a pipe connector () of an end cap () forms a fluid path (), which is separated from the other fluid path () that forms the connection between the inner filtered side () of the filter element () and a fluid outlet () of the housing () in the functional position of the filter element (). The element receptacle () forms a through-passage () toward the water collecting chamber (). Scaling assemblies () located between the through-passage () and the pipe connection () of the end cap () delimit a connecting chamber () on the outside of the pipe connector (). The connecting chamber connects the other fluid path () to the fluid outlet () of the housing ().

Filter and filter element provided therefor

A filter device, in particular for fluids contaminated with water admixtures, such as diesel oil, has a filter housing () holding at least one filter element (). The filter medium of the filter element separates an untreated side () from a treated side () during the filtration process in the filter housing (). A water collecting unit () is provided and holds separated water on the untreated side. Water separated on the untreated side () also reaches the collecting unit (). Mutually separated collecting chambers () are present in the collecting unit () for the water discharged at the treated side () and at the untreated side ().

A filter device, in particular for fluids polluted with admixtures of water, such as diesel oil, includes a filter housing () having a fluid inlet (), a fluid outlet and at least one filter element (). During the filtering process, fluid can flow through the filter medium () of the filter element from the unfiltered side () to the filtered side () of the filter medium. The filtered side surrounds an inner filter cavity (). On one side of the filter medium (), a water-separating device () and a separating region () for separated water are present. The filter element () has a passage () that forms a fluid connection to the filter cavity () and at least one water opening () that is open toward the separating region (). The filter element can be fixed to an element receptacle () of the filter housing () and can be connected to a water collecting chamber (). An adapter part () is provided at least as part of a fluid-conducting system, in which fluid paths separated from each other are formed. A first fluid path () leads from a fluid connection () of the housing () via the passage () to the inner filter cavity () of the filter element (). A second fluid path () connects the respective water opening () to the water collecting chamber ().

Filter device with water separator, separation zone, collection space and plural fluid passages, including dual passages within an adapter part secured upon a filter element retainer

A filter device for fluids, especially for fuels such as diesel fuel, includes a filter housing () defining a longitudinal axis (). The filter housing has a fluid inlet () and a fluid outlet () and can accommodate at least one filter element (). The fluid can, during filtering, flow through a filter medium () surrounding an inner filter cavity. The filter element () is enclosed by an end cap () on its lower end facing the bottom part () of the filter housing (). The end cap has a passage () forming a fluid connection to the inner filter cavity () and can be fixed to an element retainer () of the filter housing (). The element retainer () includes retaining piece () on the bottom part () of the filter housing (). The retaining piece is open towards the filter element () with a fluid channel () leading to a housing connection () running into it. The end cap () of the filter element () has a connecting piece () accommodated in the retaining piece () and secured in a supporting zone. The retaining piece () forms an opening () forming a fluid connection to the fluid channel () leading to the element retainer () and including a sealing arrangement () sealing the opening from the open end of the retaining piece.

A filter device purifies fluids, especially fuels contaminated with organic substances. Hydroxyl radicals are formed from water molecules contained in the fluids by a separating device (). The hydroxyl radicals oxidize the impurities, especially organic substances, as much as possible and convert them into compounds such as CO.

Filter device for purifying fluids

The invention relates to a device for purifying water contaminated with organic substances, which is drained or collected from filters, especially fuel filters or elements of a fuel system. Hydroxyl radicals are formed from the water by means of a separating device where the hydroxyl radicals oxidize the impurities, especially organic substances, as much as possible, and convert them into compounds such as CO.

Device for purifying water

A fuel filter system, especially for Diesel engines includes filter housing () having a fuel inlet () and a fuel outlet () and a dehydrating filter medium () between the inlet and the outlet for the fuel to pass through. The filter housing () has a collection chamber () for the water trapped by the filter medium from which collection chamber the water can be supplied to a water absorbing and evaporating device () via a controlled dispenser (). The components of the evaporating steam are releasable into the environment through the evaporating steam outlet (). The water absorbing and evaporating device () has a valve arrangement () by which the evaporating water outlet () can be closed depending on an inadmissible amount of non-evaporated water () collected in the evaporating device ().

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Ormesheim, Germany

Richard Eberle