Avl List Gmbh

Nissan Motor Company Limited

Man Truck & Bus Ag

Avl Hungary Ltd.

Robert Pöschl

Christof Knollmayr

Julian Makinson

Andreas Zurk

Daiki Tanaka

Manfred Breitenberger

Nikolaus Soukup

Werner Vogel

Michael Reissig

Robert Roithinger

Jörg Mathé

Raphael Neubauer

Bertram Obermayer

Helmut Altendorfer

Robert Toth

Matthias Lerch

Andreas Ennemoser

Günther Nagenkögl

Andreas Schrattbauer

Alexander Maier

The invention relates to a fuel cell system () comprising at least one fuel cell stack () having an anode section () and a cathode section (), an ejector (), a fuel mixture line () for conveying a fuel mixture—containing primary fuel and secondary fuel—from the ejector () to the anode section (), a primary fuel line () for supplying the primary fuel to the ejector (), and a recirculation line () for returning the secondary fuel from the anode section () to the ejector (), wherein at least sections of the primary fuel line () extend through a heat exchange volume () within the recirculation line () for a heat-transmitting connection between the secondary fuel and the primary fuel.

Fuel cell system

The present invention relates to a generator unit () having a housing (), a fuel cell device (), which is arranged in an interior space () of the housing (), a gas-carrying duct () having an upstream opening () and a downstream opening (), a valve (), which is provided, in particular set up, to connect the interior space () to the duct () at least at times in a gas-carrying manner, a driving device (), which moves gas within the duct () from the upstream opening () to the downstream opening (), and a sensor device (), which is arranged in a downstream direction of the duct () starting from the valve () and is designed to detect at least one parameter of the gas. The present invention also relates to a method for monitoring a generator unit.

Generator unit having a fuel cell device, vehicle having a generator unit of this type and method for monitoring a generator unit

The invention relates to a cylinder head () for an internal combustion engine having at least one cylinder, having at least one valve seat ring () for a lifting valve, wherein the valve seat ring () is surrounded by an annular cooling channel () for a coolant which is formed at least partially into the cylinder head (), wherein the cooling channel () surrounds the valve seat ring at least partially and extends between at least one inlet () and at least one outlet (). In order to reduce the valve wear, it is provided that, as viewed in a section perpendicularly with respect to the axis () of the valve seat ring (), the cooling channel () has at least one preferably substantially crescent-shaped bulge () in the region of the inlet () and/or the outlet ().

Cylinder head for an internal combustion engine

A cooling structure () for a cylinder head () of an internal combustion engine includes a lower first cooling jacket () adjacent to a fire deck () and an upper second cooling jacket () adjacent to an intermediate deck (), the first and second cooling jackets () being flow connected by at least one transfer opening () of the intermediate deck (), the first cooling jacket () including at least one center cooling chamber () and an outer cooling chamber arrangement with at least one first outer cooling chamber (), the outer cooling chamber () and the center cooling chamber () being flow connected by at least one exhaust side first radial passage () extending in a region of the exhaust valve bridge () and by at least one second radial passage (), the first radial passage () and the second radial passage () being streamed hydraulically in parallel. The outer cooling chamber arrange-ment of the first cooling jacket () includes at least one first outer cooling chamber () and at least one second outer cooling chamber (), which is separated from the first outer cooling chamber () by at least one flow restricting passage, whereas the second outer cooling chamber () is flow connected with the center cooling chamber () by at least one intake radial passage () extending in a region of an intake valve bridge () and/or in a region of an intake-exhaust valve bridge ().

Cooling structure for a cylinder head of an internal combustion engine

The invention relates to a cylinder head () for an internal combustion engine having at least one fire-face-side first cooling chamber () and one second cooling chamber (), which adjoins the first cooling chamber () in the axial direction of the cylinder, the first and second cooling chambers () being separated from each other by means of an intermediate plate (), a central receptacle () being arranged for an injection nozzle or ignition device for each cylinder (Z), and the first and second cooling chambers () being flow-connected to each other in the region of the central receptacle (); and having at least two, preferably four gas exchange valve openings () per cylinder (Z), the first cooling chamber () having a radial cooling duct () in the region of at least one valve bridge () between two gas exchange valve openings (). In order to improve the flow activity in disadvantaged flow regions in the simplest possible manner, the radial cooling duct () has at least one reduction in cross section () in a region lying radially outside the valve bridge (), said region preferably being further away from the cylinder axis () than the center () of at least one gas exchange valve opening ().

The invention relates to a cylinder head () for an internal combustion engine having at least one cylinder, having at least one valve seat ring () for a lifting valve, wherein the valve seat ring () is surrounded by an annular cooling duct () for a coolant that is at least partly molded into the cylinder head (), wherein the cooling duct () at least partly surrounds the valve seat ring and extends between an inlet () and at least one outlet (). In order to reduce the valve wear, provision is made for a plurality of inlets () to open into the cooling duct (), wherein the inlets () are preferably arranged asymmetrically in relation to a meridian plane (&#x3b4;) of the valve seat ring () through the outlet ().

A liquid-cooled internal combustion engine having at least one cylinder with a cylinder head in which there are disposed a lower partial cooling chamber adjacent to a fire deck and an upper partial cooling chamber which is flow-connected thereto by way of at least one main overflow aperture.

Liquid-cooled internal combustion engine

A crankcase breathing system () for an internal combustion engine includes at least one oil separating apparatus with a preliminary separator () and a main separator () arranged downstream of the same, with the preliminary separator () including a diffuser () between an inlet () and an outlet () which expands in the direction of flow. In order to achieve high separation rates in the simplest possible way it is provided that the preliminary separator () is arranged integrally with the main separator (), with preferably the preliminary separator () and the main separator () forming a separator unit ().

Crankcase breathing system

The invention relates to a cylinder head () for a liquid-cooled internal combustion engine with several cylinders, comprising at least one intake port () and at least two exhaust ports () per cylinder (), at least one first cooling chamber () adjacent to a fire deck and at least one second cooling chamber () adjacent to the first cooling chamber (), with the second cooling chamber () extending over several cylinders. In order to improve cooling in the areas subjected to great thermal stress it is provided that at least one first cooling chamber () is provided per cylinder and the first cooling chambers () of two adjacent cylinders are separated from one another, with each first cooling chamber () comprising at least one first opening () and at least one transfer opening () to the second cooling chamber (), and the first cooling chamber () is flowed through between the first opening () and the transfer opening () substantially in the longitudinal direction of the cylinder head ().

Cylinder head having coolant flow guide device

A cylinder head for a liquid-cooled multi-cylinder internal combustion engine, with a cooling chamber configuration adjacent to a fire deck, which is partitioned by an intermediary deck essentially parallel to the fire deck into a lower cooling chamber in the direction of the cylinder axis, where lower and upper cooling chambers are flow-connected by at least one main transfer opening for each cylinder in the area of the side wall of the cylinder head and by at least one auxiliary transfer opening in the region of a preferably central opening for the insertion of a fuel injection device. At least one auxiliary transfer opening is configured as a recess in the insertion opening, and at least one first auxiliary transfer opening is located in at least one of the areas between intake passage and insertion opening and/or exhaust passage and insertion opening.

Growing community of inventors

Judendorf-Strassengel, Austria

Robert Pöschl