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Ignition device for internal combustion engine

一种点火装置、内燃机的技术，应用在火花塞、电气元件、电路等方向，能够解决耗散、热量不能充分等问题

Inactive Publication Date: 2010-03-31
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, a longer portion of the ignition device including the thread, which is positioned on the side closer to the inside of the cylinder than the gasket, is exposed to high-temperature combustion gases in the cylinder, which results in insufficient dissipation of heat from the insulation.

Method used

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  • Ignition device for internal combustion engine
  • Ignition device for internal combustion engine
  • Ignition device for internal combustion engine

Examples

Experimental program
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Effect test

Embodiment Construction

[0022] figure 1 is a sectional view showing a tip portion of an ignition device for an internal combustion engine according to an embodiment of the present invention. Such as figure 1 As shown in , the ignition device for an internal combustion engine according to this embodiment includes a chamber 1 provided with an opening portion 10 leading to the cylinder and a bottom surface 20 arranged to face the opening portion 10 . The chamber 1 extends along the axial direction of the ignition device, and plasma is generated in the chamber 1 . The outer electrode 2 is arranged around the opening portion 10 and the central electrode 3 is arranged to provide a bottom surface 20 in the chamber 1 .

[0023] The outer electrodes 2 and the central electrode 3 may be made of a heat-resistant, highly conductive metal such as iron-based metals such as stainless steel, nickel-based metals or iridium-based metals. According to this embodiment, the external electrodes 2 are formed separately ...

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PUM

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Abstract

An ignition device includes: an axially extending chamber with an opening portion to be open to a cylinder and a bottom surface facing the opening portion; an outer electrode provided around the opening portion; and a center electrode that forms the bottom surface. When a voltage is applied between the center electrode and the outer electrode, a plasma is produced in the chamber and a plasma jet is injected through the opening portion. The ignition device includes: a metal housing formed integrally with or separately from the outer electrode; an insulating member that supports the center electrode while insulating the center electrode from the housing and the outer electrode; and a screw thread formed on a periphery of the housing by which the ignition device is screwed into a cylinder head of the internal combustion engine. A gasket is disposed in a side closer to the inside of the cylinder. A peripheral wall of the chamber is formed by the insulating member.

Description

technical field [0001] The invention relates to an ignition device for an internal combustion engine. Background technique [0002] In an internal combustion engine, it is necessary to use a spark plug to reliably ignite a homogeneous air-fuel mixture in the entire space in the cylinder or in a part of the cylinder. However, the conventional spark plug that generates the spark in the spark gap ignites the air-fuel mixture at only one point, and thus the conventional spark plug has low ignitability. [0003] (For example, refer to Japanese Patent Application Laid-Open No. 2006-294257 (JP-A-2006-294257)) has disclosed an ignition device employing plasma jet injection for enhancing ignition capability. The ignition device includes a chamber, an outer electrode and a central electrode. The chamber is provided with an opening portion leading to the cylinder and a bottom surface arranged to face the opening portion, the chamber extending in the axial direction. The outer electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01T13/08H01T13/50
CPCH01T13/50H01T13/08
Inventor 小林辰夫
Owner TOYOTA JIDOSHA KK
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