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Method for measuring an ionization current of a spark plug of the type with resonant structure, and corresponding device

A technology of ionization current and resonance structure, which is applied in the direction of mechanical equipment, spark ignition device, spark ignition controller, etc., and can solve problems such as wall damage

Inactive Publication Date: 2009-03-04
RENAULT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The buildup of these microbursts will shatter and melt a small amount of metal on the top of the piston and / or on the various walls of the cylinder which, over time, can cause damage to those walls of the piston and cylinder

Method used

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  • Method for measuring an ionization current of a spark plug of the type with resonant structure, and corresponding device
  • Method for measuring an ionization current of a spark plug of the type with resonant structure, and corresponding device
  • Method for measuring an ionization current of a spark plug of the type with resonant structure, and corresponding device

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Embodiment Construction

[0033] In Fig. 1, the reference sign SYS denotes an ignition system for a motor vehicle comprising a spark plug BR of the vibrating structure type, which is well known to those skilled in the art and described, for example, in French patent application FR 2 859 830 in the name of the applicant. , FR 2 589 869 and FR 2 859 831 are described.

[0034] Ionization current Ii flows through spark plug BR.

[0035] More specifically, as shown schematically in FIG. 1, the spark plug BR includes a resonant assembly RS1 (called a spark plug coil), which includes an inductance coil L1 and a capacitor C1, which in this embodiment includes a shell 1, a ceramic 2. Assemblies of the center electrode 3 .

[0036] The spark plug BR is connected to a generator GEN capable of generating a high value voltage called "intermediate voltage". This high-value voltage is directed by the central electrode 3 of the capacitor C1. When this current passes between the center electrode 3 and the ground el...

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Abstract

The invention concerns a device for measuring an ionization current of a spark plug of the type with resonant structure, equipping a motor vehicle ignition system, said spark plug (BR) being coupled to a generator (GEN) comprising a regulating capacitor. Said generator further comprises polarizing means (MPOL) for polarizing the spark plug (BR), connected between the generator (GEN) and said spark plug (BR) and means for measuring (MMES) the ionization current of said spark plug (BR), connected between the regulating capacitor (Cb) and the ground.

Description

technical field [0001] The present invention generally relates to measuring the ionization current of spark plugs, particularly spark plugs of the resonant structure type used in ignition systems of motor vehicles. [0002] The invention is particularly suitable for so-called "radio frequency" ignition systems comprising a multi-spark type resonant structure spark plug or BME. Background technique [0003] These ignition systems using alternating current are described, for example, in French patent applications FR 2 859 830, FR 2 589 869 and FR 2 859 831 in the applicant's name. [0004] At the end of the compression cycle, the spark plug is responsible for forming an electric arc with enough energy to trigger the ignition process of the gaseous mixture contained in the combustion chamber of the engine. [0005] This arc corresponds to the ionization of the gaseous mixture located between the electrodes of the spark plug, namely the positive center electrode and the ground ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02P17/12F02P15/08
CPCF02P3/01F02P2017/125F02P17/12F02P9/007F02P15/08
Inventor A·阿涅雷C·努瓦尔
Owner RENAULT SA