Borgwarner Beru Systems Gmbh

Markus Mueller

Gerd Braeuchle

Ganghua Ruan

The invention relates to a method for energizing an HF resonant circuit which contains an igniter as a component for igniting a fuel-air mixture in a combustion chamber of an internal combustion engine by means of a corona discharge, wherein the igniter comprises an ignition electrode and an insulator surrounding the ignition electrode, by means of a DC-AC inverter which is excited by successive current pulses which each last while a switch controlled by a control circuit is in its conducting switching state. It is provided according to the invention that the switch is actuated when an instantaneous value of an alternating current or an alternating current voltage excited in the HF resonant circuit falls below a first switching threshold (A&#x2212;, B&#x2212;, C&#x2212;) and the switch s actuated when the instantaneous value of the alternating current or the alternating current voltage excited in the HF resonant circuit exceeds a second switching threshold (A+, B+, C+).

Method for energizing an HF resonant circuit which has an igniter as a component for igniting a fuel-air mixture in a combustion chamber

The invention describes a method for generating corona discharges in two combustion chambers of a combustion engine, into each of which a high-frequency igniter (HFZ, HFZ) protrudes which is part of a high-frequency resonant circuit, by providing only one single transformer (TR), which has a primary side and a secondary side, at least one primary winding on the primary side and a secondary winding on the secondary side, connecting the secondary winding of the transformer (TR, TR) to both resonant circuits and feeding into both resonant circuits the high frequency alternate current flowing through the secondary winding.

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Neuenstein, Germany

Markus Mueller