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Ignition control system and ignition control device

An ignition control and conversion control technology, applied in ignition controllers, spark ignition controllers, and other devices, can solve the problem of poor ignitability of combustible gas mixtures, reduced energy transfer efficiency of combustible gas mixtures, and increased cooling energy consumption And other issues

Active Publication Date: 2019-07-30
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, in the state where the creeping discharge follows the surface of the insulator, the cooling energy consumption of the discharge at the insulator increases, the energy transfer efficiency to the combustible gas mixture decreases, and the ignitability of the combustible gas mixture may deteriorate.

Method used

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  • Ignition control system and ignition control device
  • Ignition control system and ignition control device
  • Ignition control system and ignition control device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] refer to figure 1 , the engine system 10 has an engine 11 which is a spark ignition type internal combustion engine. The engine system 10 changes and controls the air-fuel ratio of the combustible air-fuel mixture to the rich side or the lean side with respect to the stoichiometric air-fuel ratio according to the operating state of the engine 11 . For example, when the operating state of the engine 11 is in the low-rotation and low-load operating region, the air-fuel ratio of the combustible air-fuel mixture is controlled to be changed to the lean side.

[0031] A combustion chamber 11 b and a water jacket 11 c are formed inside an engine block 11 a constituting a main body portion of the engine 11 . The engine body 11a is provided to house a piston 12 that can move reciprocally. The water jacket 11c is a space through which a coolant (also referred to as cooling water) can flow, and is provided so as to surround the periphery of the combustion chamber 11b.

[0032] ...

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PUM

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Abstract

This ignition control system is provided with an ignition plug (19) which is provided with: a cylindrical ground electrode (193); a cylindrical insulator (192) which is held inside the ground electrode, and which is provided with a protruding part (192A) which protrudes further towards the tip-end side than the ground electrode; and a central electrode (191) which is held inside the insulator, andwhich is exposed from the insulator. The ignition control system is also provided with: an ignition coil (311) provided with a primary coil (311A) and a secondary coil (311B); and a primary current control unit (32) which executes, in one combustion cycle of an engine, creeping discharge control, in which creeping discharge is generated along the surface of the insulator, and, after the creepingdischarge control has been executed, aerial discharge transition control, in which the creeping discharge generated in the ignition plug is stopped, and, after a discharge stoppage period has elapsed,a primary current is cut off.

Description

[0001] Cross References to Related Applications [0002] This application is based on Japanese Patent Application No. 2016-243190 for which it applied on December 15, 2016, and uses the content of description here. technical field [0003] The invention relates to an ignition control system and an ignition control device for an internal combustion engine. Background technique [0004] An ignition device included in an internal combustion engine (hereinafter referred to as an engine) supplies a primary current to a primary coil connected to a power source, and accumulates magnetic energy in the ignition coil. Then, the voltage generated in the secondary coil when the primary current is cut off is applied to the center electrode of the ignition plug, thereby generating a spark discharge between the center electrode and the ground electrode. In some ignition plugs, a cylindrical insulator with a protruding tip is arranged inside a cylindrical ground electrode, and a center ele...

Claims

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Application Information

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IPC IPC(8): F02P9/00F02P13/00
CPCF02P3/0407F02P3/0456F02P9/007F02P5/1502F02P3/04F02P9/00F02P13/00H01T13/52F02P3/045F02P3/05F02P5/142F02P3/0853F02P3/10
Inventor 若杉亮太杉浦明光青木文明
Owner DENSO CORP