Bayerische Motoren Werke Aktiengesellschaft

Nexans

Johannes Denteler

Johannes Meyer

Helmut Kellermann

Andreas Donner

Sunhilde Fleischer

Helmut Dr Steinberg

Udo Dr Mayer

For a rotary actor device for stroke control of a charge changing valve in the cylinder head of an internal combustion engine with rocking stepper motor for driving a control disk with a cam profile controlling a charge changing valve, wherein the rocking motor is operated accordingly, an interplay of a closing spring of the poppet valve with a biased spring arm, provision is made for the achievement of stable end positions of the control disk, such that it is positioned by means of a separate first and second rotary abutment and is held securely against rotation in the particular starting position by the opening spring acting on a shaft bearing the control disk, while in each case by means of a relatively low powering of the stepper motor or of a ricochet movement brought about by means of corresponding abutments to overcome the starting position, the further supply of power remains substantially reduced by means of a rotor of the rocker motor chosen according to the energy exchange between closing spring and arm spring in a rotor of the rocker motor chosen to correspond to its flywheel moment.

Rotary actuator device to control the stroke of a charge exchange poppet valve in the cylinder head of an internal combustion engine

An internal combustion engine includes an electromagnetic actuator for operating a gas exchange valve, this actuator being situated on a cylinder head. The actuator includes a switchable electromagnet which is situated between two armatures. The armatures are axially set apart on a common armature shaft. A cavity is configured in the cylinder head, in which the actuator armature on the cylinder head side is at least partially accommodated, and the electromagnet at least partially delimits the cavity on the actuator side. This results in a compact internal combustion engine.

Internal combustion engine comprising an electromagnetic actuator which is situated on a cylinder head

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Moosburg, Germany

Johannes Denteler