Mann+hummel Gmbh

Filterwerk Mann + Hummel Gmbh

Matthias Alex

Helmut Spannbauer

Keat Boon Mah

Arthur Klotz

Volker Ernst

Juergen Kosicki

Rolf Fuesser

Frank Pfeiffer

Christine Oprisch

Wolfgang Wenzel

Klaus Rentschler

Hermann Maurer

Michael Geiger

Jasris Jasnie

Sabine Vogt

Christoph Klink

Marcus Weber

Edgar Vogel

Holger Wollenberg

A filter system for filtering a fluid has at least one filter housing with a first housing part and a second housing part. The filter housing has at least one inlet and at least one outlet for the fluid. A fluid path extends between the at least one inlet and the at least one outlet. At least one filter element is arranged in the at least one filter housing in the fluid path. At least one damper element is provided that is completely or partially filled with the fluid at least after an initial filling. The at least one damper element is provided with a volume that, at least in operation of the filter system, is filled completely or partially with the fluid. The volume is separated from the fluid path.

Filter system with a filter element

An air induction system for attenuating sound produced by an engine, a housing defining a working chamber for attenuating sound produced by the engine. The air induction system further includes a tube having a first end extending into the working chamber and a second end to be in fluid communication with the engine. The air induction system further includes a first flange radially extending from the tube and disposed in the working chamber. The tube, the housing and the first flange cooperate to define a resonator operable to attenuate sound produced by the engine.

Air induction system having an acoustic resonator

A device for noise transmission of an intake system of an internal combustion engine to the interior of a motor vehicle has a transmission line having an inlet at a first end and an exit provided with a mouth at a second end. A diaphragm is arranged at the second end to close off the mouth and to enable noise transmission. The inlet of the transmission line communicates with the intake system of the internal combustion engine. A protective device is arranged at the second end to protect the diaphragm.

Device for noise transmission in a motor vehicle

An apparatus for transmitting sound in a motor vehicle having a housing () with an inner partition (), which together define two separate subspaces (). A transmission valve () which separates the two subspaces () is provided in a pivot bearing opening () in the partition () and is mounted to pivot about a pivot axis () in the area of the pivot bearing opening (). The first subspace () is connected in a manner capable of transmitting sound to an intake manifold () of an internal combustion engine, and the second subspace () is connected in a manner capable of transmitting sound to an interior space of the motor vehicle. The gap () between an edge () of the pivot bearing opening () and the transmission valve () is sealed in a pressure-tight manner by a membrane ().

Apparatus for transmitting sound in a motor vehicle

A duct or conduit section ( ) for installation, in particular, in an air intake system of an internal combustion engine, in which the duct section is composed of two shells ( ) which are joined by a snap connection ( ). Openings located in the parting seam or joint ( ) between the shells ( ) are produced by recesses in the half shells. These openings each have a cross-sectional area of less than 7 mm and are useful for suppressing noise resulting from the air intake. As a result of the openings, vibration-inducing forces exerted on adjacent components in the engine compartment due to pulsations in the intake tube, can be minimized or avoided. Also, the quantity of additional air drawn in from the engine compartment, which is undesired because it is too warm, is decreased.

Air intake device comprising a duct section provided with openings

An air induction device ( ) for an internal combustion engine including an air filter housing ( ) with an open induction tube ( ) leading away from it and a supplementary induction tube ( ) having a closing element, preferably in the area of its end opening ( ). The closing element may take the form of a rotary flap ( ) and is actuated depending on engine speed. The housing ( ) and the induction tubes ( ) are configured in geometrical terms in such a way that at low engine rotational speeds, the housing ( ) and the open induction tube ( ) form a Helmholtz resonator, while the closed supplementary induction tube ( ) forms a quarter-wave tube leading from the housing ( ). At higher engine rotational speeds, the supplementary induction tube ( ) is opened, and the overall length of the supplementary induction tube ( ) is adapted so that at the higher speeds, it forms a Helmholtz resonator with the air filter housing ( ) and the open induction tube ( ).

Air induction system for internal combustion engine

The invention relates to a silencer. The silencer includes a sound conducting channel having two ends. An injection molded part is arranged between the two ends of the sound conducting channel and includes a plurality of pipe elements. A shunt resonator is arranged in fluid communication with the sound conducting channel by way of openings formed in the plurality of pipe elements. The shunt resonator defines a volume formed by two housing parts which are joined together. By varying the number, position, length and diameter of the pipe elements in the silencer, the silencer is capable of achieving silencing gains in different frequency ranges.

Silencer with a shunt resonator

Camshaft controller, in particular for use in an induction manifold

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Heilbronn, Germany

Matthias Alex