Fev Motorentechnik Gmbh & Co Kg

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Fev Forschungsgesellschaft Fur Energietechnik Und Ver Brennungsmotoren

Fev Forschungsgesellschaft Fur Energietechnik Und Verbrennungsmotoren Mbh

Fev Motorentechnik Gmbh

Klockner-Humboldt-Deutz Ag

Fev Motorentechnik Gmbh & Co. Kommanditgesellschaft

Fev Motorentechnik Gmbh & Co.

Fev Forschungsgessellschaft Fur Energietechnik Und Verbrennungsmotoren

Forschungsgesellschaft Fur Energietechnik Und Verbrennungsmotoren Mbh

Fev Motorentechnik Gmbh & Co. Kb

Franz Pischinger

Gerhard Lepperhoff

Peter Kreuter

Martin Pischinger

Gunter Schmitz

Thomas Esch

Guenter Schmitz

Georg Huthwohl

Leo Spiegel

Cornelis Havenith

Peter Hofbauer

Michael Schebitz

Gunter Lothar Gurich

Wolfgang Salber

Frank Van Der Staay

Ernst Scheid

Ulrich Hilger

Manfred Durnholz

Matthias Schneider

Robert Sollner

Hans-Peter Kollmeier

Rolf Backes

Michael Huser

Norbert Alt

Ulrich Spicher

Oliver Lang

Georg Heuser

A two-stroke internal combustion engine comprises a first cylinder and a second cylinder arranged on a common axis. A first piston pair comprises a first piston and a second piston located in the first cylinder and defining a first combustion chamber. The first piston and the second piston of the first piston pair move in opposite directions within the first cylinder. A second piston pair comprises a first piston and a second piston located in the second cylinder and defining a second combustion chamber. The first piston and the second piston of the second piston pair move in opposite directions within the second cylinder. The first piston of the first piston pair is connected to the second piston of the second piston pair by a first connecting rod. The second piston of the first piston pair is connected to the first piston of the second piston pair by a second connecting rod. A fuel supply is connected to at least one of the first cylinder or the second cylinder. At least one of the first cylinder or the second cylinder includes a first end and a second end. A plurality of inlet openings define an inlet plane proximate the first end. A plurality of exhaust openings are located proximate the second end. The fuel supply injects fuel proximate to the first end.

Two-stroke internal combustion engine with free opposed pistons

A piston internal combustion engine with at least one gas exhaust valve ( ) for each cylinder ( ), which is actuated by an actuator ( ), in particular an electromagnetic actuator, controlled by a fully variable engine control unit ( ). Based on the predetermined operating cycle, the valve can close off the cylinder interior space against a gas exhaust channel ( ) that follows the valve seat ( ) of the exhaust valve. This channel is connected to an exhaust gas system and is provided with a means for example a constriction ( ) for reducing the pressure gradient during the start of the opening of the gas exhaust valve ( ). A specific pressure fluctuation is used for a further reduction in the pressure gradient behind the exhaust valves during the opening through a corresponding layout of the pipe geometry and the container volumes in the exhaust gas system or corresponding installed components.

Piston internal combustion engine with pressure relief gas exhaust valves

Electromagnetic actuator with impact damping

A method of initiating motion of at least one of cylinder valve of a cylinder of a reciprocating engine, with each cylinder valve being actuated by an electromagnetic actuator having an electrical closing magnet and an electrical opening magnet, between which magnets an armature that is connected to the cylinder valve to be actuated is movably guided back and forth, counter to the forces of restoring springs, and with the alternating current supply to the closing magnet and the opening magnet being controlled by an electrical engine control. The natural frequency of the spring-mass system formed by the restoring springs and the armature with the cylinder valve is stored in the electrical engine control. The instantaneous rpm and position of the crankshaft with respect to a dead center point position and with reference to the stored natural frequency are detected by the engine control. The time for the beginning of an alternating current supply to the electromagnets is calculated in the period of the natural frequency, taking into consideration the crankshaft rpm and position, the natural frequency of the spring-mass system and the armature path from an inoperative position until it is in contact with the pole surface of one of the two electromagnets, so that the armature motion and the piston motion occur in the same direction immediately before a possible contact of the armature with the pole surface of a capturing magnet.

Method of initiating motion of a cylinder valve actuated by an

An actuator for moving a setting member includes a force-generating device; a transmitting member for transmitting a force from the force-generating device to the setting member; a carrier spaced from the transmitting member; and first and second suspension elements spaced from one another parallel to the direction of motion of the transmitting member and being attached to the carrier and the transmitting member for supporting and frictionlessly guiding the transmitting member in motions thereof.

Actuator having a movable transmitting element with frictionless guidance

An internal-combustion engine includes an engine cylinder having an axis, a cylinder top and a cylinder chamber; a piston slidably received in the cylinder and bordering the cylinder chamber; an intake valve, an exhaust valve and an ignition device arranged at the cylinder top; and a fuel injection nozzle arranged at the cylinder top and opening into the cylinder chamber at a location adjoining the exhaust valve.

Device for injecting fuel at the exhaust port of an engine cylinder

An electromagnetic actuator, particularly for operating a cylinder valve of an internal-combustion engine, includes an electromagnet for generating an attracting electromagnetic force; an armature movable into contact with and away from the electromagnet; a spring arrangement connected to the armature and opposing the electromagnetic force; and a sound muffling device attached to the electromagnet for reducing sound transmission by body vibration from the electromagnet.

Electromagnetic actuator, including sound muffling means, for operating

A method of operating a cylinder valve of an internal-combustion engine with an electromagnetic actuator for moving the cylinder valve into opposite open and closed valve end positions includes the steps of energizing an electromagnet of the actuator for generating an electromagnetic force for moving an armature of the actuator toward a pole face of the electromagnet against the force of a return spring; after the armature enters a zone adjacent the pole face of the electromagnet, applying to the armature an additional force opposing the electromagnetic force of the electromagnet; dimensioning the additional force such that an equilibrium between the electromagnetic force of the electromagnet and the increased opposing force of the return spring is situated at a location shortly before the armature enters into engagement with the pole face of the electromagnet; and after the armature reaches the location of force equilibrium, controlling a current supply to the electromagnet such that the armature reaches the pole face of the electromagnet with a predeterminable velocity.

Method for controlling an electromagnetic actuator operating an engine

A method for a controlling cylinder valve drive in a piston-type internal combustion engine includes the steps of detecting vibration signals generated during operation by the cylinder valve drive or the cylinder valve, and actuating the cylinder valve drive in dependence on a value of the detected vibration signals which corresponds to the impact time or impact speed of the cylinder valves.

Method for controlling cylinder valve drives in a piston-type internal

A method of measuring a valve play in a reciprocating valve. The valve has open and closed positions and is operated by an electromagnetic actuator which includes an opening electromagnet, a closing electromagnet, an armature movable between pole faces by electromagnetic forces against a spring force of a return spring arrangement for moving the valve into an open position. The valve play is defined by a clearance between the armature and the valve when the armature is in contact with the pole face of the closing magnet and the valve is in the closed position. The method includes the steps of detecting a motion of the armature within the clearance as a function of the course of voltage and/or current in the closing electromagnet; and deriving the size of the valve play from an irregularity (spike) in the course of voltage and/or current. The irregularity is caused by an impacting of the armature on the valve and/or the pole face of the closing electromagnet.

Method of measuring a valve play of an engine-cylinder valve operated by

A method of reducing NO.sub.x emissions of a turbo-charged internal combustion engine. The engine has an exhaust conduit guiding an exhaust gas stream, a charge-air intake conduit guiding a charge-air stream and a turbocharger including a turbine disposed in the exhaust conduit and a compressor disposed in the charge-air intake conduit. The method comprises the steps of branching off a partial exhaust gas quantity from the exhaust gas stream upstream of the turbine as viewed in a direction of exhaust gas flow; passing the partial exhaust gas quantity through a particle filter; and introducing the partial exhaust gas quantity into the charge-air stream upstream of the compressor.

Method of reducing the NO.sub.x emission of a supercharged piston-type

Process and arrangement for supplying lubricant to a reciprocating

Filter arrangement for removal of soot particles from the exhaust gases

A device for the combined blowoff of fuel and air for direct fuel injection systems in internal combustion engines. The device includes a housing having a fuel connection and an air connection as well as a blowoff aperture connected with both connections and closable by electromagnetically operable valves. A fuel valve is arranged behind an air valve, also opening toward said blowoff side of said blowoff aperture. Both valves are arranged concentrically relative to each other and capable of resting with their valve seats sealing against the housing.

Device for the combined blowoff of fuel and air

In a process and device for sensing and evaluating knocking combustion during operation of an internal combustion engine the electromagnetic radiation in a combustion chamber thereof, which changes upon knocking combustion, is detected and transmitted to a measuring and/or processing device. The occurrence of knocking combustion can be precisely determined by measuring the rate of increase in the intensity of the electromagnetic radiation in a volume of the open combustion chamber which is displaced from the spark plug and which is less than 0.04%, preferably 0.004%, of the displacement volume in the top piston dead center.

Process and device for sensing and evaluating knocking combustion during

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Aachen, Germany

Franz Pischinger