Method for igniting a fuel-air mixture in a combustion chamber of an internal combustion engine by corona discharge

An air mixture and combustion chamber technology, applied in electrical components, spark ignition devices, circuits, etc., can solve problems such as unsatisfactory combustion, achieve the effect of preventing undesired combustion and prolonging service life

Active Publication Date: 2011-12-07
BORGWARNER BERU SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The impedance of the primary side of the transformer where the corona discharge occurs and the impedance of the corona discharge into an undesired arc discharge or spark discharge can change during the service life of the ignition electrode, which can have a significant impact on the service life of the ignition electrode and the formation of corona have adverse effects and can lead to suboptimal combustion

Method used

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  • Method for igniting a fuel-air mixture in a combustion chamber of an internal combustion engine by corona discharge
  • Method for igniting a fuel-air mixture in a combustion chamber of an internal combustion engine by corona discharge
  • Method for igniting a fuel-air mixture in a combustion chamber of an internal combustion engine by corona discharge

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Embodiment Construction

[0052] figure 1 Shown is a combustion chamber 1 delimited by walls 2, 3, 4 at ground potential. Ignition electrode 5 , which is surrounded along part of its length by an insulator 6 , extends from above into combustion chamber 1 and is guided by this insulator through upper wall 2 into combustion chamber 1 in an electrically insulated manner. The ignition electrode 5 and the walls 2 to 4 of the combustion chamber 1 are part of a series oscillating circuit 7 which also includes a capacitor 8 and an inductor 9 . Of course, the series oscillating circuit 7 may also contain further inductors and / or capacitors, as well as other components known to those skilled in the art as possible components of a series oscillating circuit.

[0053] The high-frequency generator 10 is provided for exciting the oscillating circuit 7 and contains a DC voltage source 11 and a transformer 12 as a DC / AC converter, the latter having a center tap 13 on the primary side so that the two primary windings...

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Abstract

A method of igniting a fuel-air mixture in a cyclically operating internal combustion engine comprising one or more combustion chambers (1) delimited by walls (2, 3, 4) at ground potential, using ignition means comprising The ignition electrode (5) in the chamber (1), in this method an electric oscillating circuit connected to the secondary side (17) of the DC / AC converter (12) is excited by the electric DC / AC converter (12) ( 7), wherein the ignition electrode (5) cooperates with the walls (2, 3, 4) of the combustion chamber (1) to form a capacitor, and the ignition electrode (5) is electrically insulated from the walls (2, 3, 4) through the insulator (6) is guided through one of the walls (2, 3, 4) of the combustion chamber (1) to extend into the combustion chamber (1), and the excitation of the oscillating circuit (7) is controlled to the ignition in each combustion chamber (1) The electrode (5) generates a corona discharge (22) that ignites the fuel-air mixture. According to the invention, combustion residues that have deposited on the surface of the insulator (6) in the combustion chamber (1) are removed from time to time using a combustion process and / or an electroerosion process.

Description

technical field [0001] The invention relates to a method for igniting a fuel-air mixture in a combustion chamber, in particular in an internal combustion engine, by generating a corona discharge. This method is known from WO 2010 / 011838 A1. Background technique [0002] Document WO 2004 / 063560 A1 discloses how a fuel-air mixture in a combustion chamber of an internal combustion engine can be ignited by means of a corona discharge generated in the combustion chamber. For this purpose, the ignition electrode is guided through one of the walls of the combustion chamber at ground potential in an electrically insulated manner and extends into the combustion chamber, preferably opposite a reciprocating piston arranged in the combustion chamber. The ignition electrode forms a capacitor in cooperation with the wall of the combustion chamber which is at ground potential and acts as a counter electrode. The combustion chamber and its contents act as a dielectric. Depending on which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02P23/04H01T13/52
CPCF02P23/04F02P3/01
Inventor T·施雷默尔G·布罗伊希勒M·特朗普S·博内
Owner BORGWARNER BERU SYST
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