Fev Motorentechnik Gmbh

Fev Motorentechnik Gmbh & Co. Kommanditgesellschaft

Fev Motorentechnik Gmbh & Co Kg

Wolfgang Salber

Thomas Esch

Martin Pischinger

Michael Schebitz

Markus Duesmann

Franz Pischinger

Hans Kemper

Frank Van Der Staay

Enno Lohse

J&uuml;rgen Hagen

Oliver Lang

A method of influencing the mixture formation and charge movement in the cylinders of a piston internal combustion engine, having at least one gas intake valve and at least one gas outlet valve per cylinder. Each of the valves is provided with a fully variable, preferably electrimagnetic, valve drive and is controllable via an electronic control device that is configured such that within predetermined speed ranges and/or for predetermined load conditions, at least some of the gas intake valves and/or the gas outlet valves can be moved, respectively in dependence on the piston stroke, with a stroke course that is variable, relative to the opening and closing moments and/or the opening time, the opening width and/or the opening duration and/or the movement speed.

Method for influencing the mixture formation and charging movement in a cylinder of a piston internal combustion engine with externally applied ignition

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

The present invention relates to a piston-type internal combustion engine comprising gas-exchange valves which can be driven in a completely variable manner by a motor control ( ) and which communicate with an air supply channel ( ) provided with a device ( ) for generating a negative pressure using the energy components of the air flowing through said air supply channel ( ). This device is provided with means that can be driven for adaptation to the modifications in the flow energy which are inherent to the operation, and communicates with at least one negative-pressure user ( ) through at least one negative-pressure duct ( ).

Piston-type internal-combustion engine with throttle-free load control and a device for generating a vacuum, and method for operating the device

A method for operating a piston-type internal-combustion engine having electromagnetic valve trains for actuating the cylinder valves, which respectively have an armature that can move back and forth between two electromagnets, counter to the force of restoring springs, with the valves being completely variably actuated by an electronic engine timing control unit. The functioning of the electromagnetic valve trains of each cylinder is detected in the engine timing control unit during operation, and when a functional failure of an electromagnetic valve train is detected at a cylinder, the electromagnet of the failed electromagnetic valve train is acted upon with a capturing current, which brings the armature into an end position at an electromagnet, and from this end position, the electromagnetic valve train is actuated for the ongoing work cycle of the cylinder.

Method for operating a piston-type internal-combustion engine in the event of a temporary functional failure of an electromagnetic valve train

A method of cold starting an internal-combustion engine includes the steps of rotating the engine crankshaft by a starter motor to initiate cold starting; and during initial work cycles of the cold start, controlling, by an engine control device, the cylinder valves, the fuel injection device and the ignition device belonging to at least one selected cylinder, such as to operate the selected cylinder in a delayed intake opening mode.

Method of cold starting a throttle-free, multi-cylinder internal-combustion engine

A method of affecting a mixture formation and motion of a charge in a cylinder of an externally ignited internal-combustion engine during a suction cycle of a gas intake valve of the cylinder. The suction cycle has a first cycle portion and a second cycle portion; the second cycle portion constitutes an end portion (leading and/or trailing end portion) of the suction cycle. The gas intake valve has, during the first suction cycle, a first open position at full valve stroke in which the gas intake valve has a fully open cross-sectional flow passage area. The method includes the step of maintaining the gas intake valve in a second open position at a partial stroke of the gas intake valve during the second cycle portion. The partial stroke is less than one half of the full stroke, and in the second open position the gas intake valve has a partially open cross-sectional flow passage area. The method further includes the step of maintaining the gas intake valve in the first open position during the first cycle portion.

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Aachen, Germany

Wolfgang Salber