Thyssenkrupp Presta Teccenter Ag

Thyssenkrupp Automotive Ag

Mowag Gmbh

General Dynamics European Land Systems-mowag Gmbh

Kai-Uwe Keller

Peter Kuhn

Helmut Schön

Frank Obrist

Christian Busch

Hans-Jörg List

Gordon Köhne

Uwe Fehr

Michael Bieniek

The protection system is used especially for the protection against a fatal effect of vertical accelerations triggered by a landmine on the passengers of an armored vehicle. For this, the sitting unit consisting of a seat body () and a backrest () is held movable in vertical direction and is coupled with an end area () of a longitudinally variable damping device (), whose other end () is connected to the roof () of the vehicle () through a carrying equipment (). In addition, the sitting unit is carried with vertical distance from the vertical guide () in a lower guide path () transversally directed so that the sitting unit executes both a downward as well as a tilting movement relative to the vehicle together with a passenger () during loading through vertical acceleration. In this way, an improved usage of the constructively limited effective length of the damping device () occurs so that the effect of the protection system is essentially improved. It is sensible to apply the same principle for the protection of all objects, which must be protected against the reaching or exceeding of a maximum load due to a too large acceleration or deceleration.

Protection system

The invention relates to a device for the variable actuation of the gas exchange valves of internal combustion engines, whereby a continuously revolving cam drives an intermediate member which carries out an oscillating, pure rotational movement and moves a drive member in accordance with the respective valve lift curve via a control cam. In order to modify the valve lift curve, the position of the rotational axis of the intermediate member can be modified along an advance curve. The rotational axis of the intermediate member is represented by a pin which is freely rotatable at its guide end and which carries cam plates that are linked therewith in a rotationally fixed manner. Said cam plates define either directly or indirectly the respective required position on the advance curve. The pin is rotated via a suitable joining element.

Device for variable actuation of the gas exchange valves of internal combustion engines

The invention relates to a device for the variable actuation of gas exchange valves for internal combustion engines, wherein at least one cam () pertaining to a camshaft () mounted in a housing rotates according to the engine speed. The cam () first drives an intermediate member () which performs a clear oscillating, rotary movement and has a rotational axis () that can be displaced in the housing parallel to itself along a curve of displacement (), said intermediate member comprising a control cam () having a lifting region () and actuating an output member () that, in turn, actuates at least one valve (). The aim of the invention is to enable one such device to be reliably controlled. To this end, the control cam () has a catch region (), and the intermediate member () is mounted on a bearing having an axis which corresponds to the rotational axis (), said bearing being arranged in such a way that it is guided in a forced manner and can be displaced parallel to the curve of displacement (), by means of an articulation () connected to the cylinder head or the housing or by a slide () that is guided in the housing in a positively locking manner. The invention also relates to a method for operating an internal combustion engine comprising a plurality of cylinders using at least one of the inventive devices.

Device for the variable actuation of the gas exchange valves of internal combustion engines, and method for operating one such device

Growing community of inventors

Kreuzlingen, Switzerland

Kai-Uwe Keller