Filterwerk Mann + Hummel Gmbh

Hans-Werner Holch

Herbert Jainek

Heinz Mueller

Thomas Butz

Roland Hartmann

An assembly for an internal combustion engine comprising an oil filter in a first housing structure and, for instance, an oil separator in a second housing structure The two housing structures can be combined to form a modular assembly. The assembly includes duct structures which are combined to form a common line segment to reduce the material and manufacturing costs for the assembly. The different duct structures may include, for example, an oil drain for the oil filter, which simplifies service (changing the filter element). The duct structure of the second housing structure can serve, for example, to transport crankcase gases to an oil separator in the second housing structure or to return separated oil from the oil separator to an engine crankcase. The oil drain of the oil filter housing may be combined with the drain the oil from the oil pan of the internal combustion engine, and the two drains may optionally be closed by a single drain plug.

Structural assembly with an oil filter for an internal combustion engine

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

Device for separating liquid particles from a gas stream

Heating arrangement

A pressure regulating valve, especially for regulating the vacuum in the crankcase of an internal combustion engine, which includes a pan-shaped housing having a bottom part, a housing cover, and a diaphragm 14 arranged between the housing and housing cover. A hollow cylindrical part 26 is arranged adjacent the diaphragm and encloses an intermediate valve member which is held in its rest position by a compression spring 24. The diaphragm is moved by a further compression spring 25 into an upper, rest position. If a vacuum in the intake manifold exceeds a certain limit value, the first valve opening between the valve seat 17 and the valve plate 18 closes against the force of the spring 24, so that blow-by gases aspirated from the crankcase are carried through the valve opening 20. If the intake manifold vacuum increases further, the diaphragm 14 moves toward the valve opening 20 and, at a maximum permissible vacuum, closes this valve opening as well. This two-stage valve is constructed in an especially compact and space-saving manner, and can be set to specific pressure limits by appropriately sizing the compression springs or the cross-sectional ratios of the valve parts.

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Heilbronn, Germany

Hans-Werner Holch