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Ignition system for an internal combustion engine

A spark plug, internal combustion engine technology, used in internal combustion piston engines, engine ignition, combustion engines, etc.

Inactive Publication Date: 2006-09-20
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the above known engines do little to reduce emissions, especially hydrocarbons, in the engine exhaust

Method used

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  • Ignition system for an internal combustion engine
  • Ignition system for an internal combustion engine
  • Ignition system for an internal combustion engine

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Experimental program
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Embodiment Construction

[0017] refer to Figure 1A and 1B , in the internal combustion engine 1, the combustion chamber 13 is formed by the bore 11, the cylinder head 12 and the piston 14 provided in the cylinder. The combustion chamber 13 is of the roof type. The intake valve 15 is provided on one side of the ridge line 12a of the ridge, and the exhaust valve 16 is provided on the other side. The central spark plug 31 and the peripheral spark plug 32 are arranged along the ridge line 12a.

[0018] The center spark plug 31 is disposed substantially at the center of the cylinder head 12 . The central spark plug 31 protrudes from the inner surface of the cylinder head 12 so that its electrode 31 a is close to the piston 14 .

[0019] The peripheral spark plug 32 is disposed close to the ridge line 12 a of the roof and close to the periphery of the combustion chamber 13 . The protrusion amount of the electrode 32a of the peripheral plug is adjusted to be closer to the inner surface of the cylinder h...

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PUM

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Abstract

A spark plug system includes a centre spark plug and a plurality of peripheral spark plugs, the spark plugs extending into a ridge-roof type combustion chamber of an internal combustion engine from the inner surface of a cylinder head and being disposed approximately on the ridgeline of the ridge-roof. The amount by which the centre plug projects into the combustion chamber from the inner surface of the cylinder head is different from the amount by which each of the peripheral plugs projects into the combustion chamber from the inner surface of the cylinder head, whereby the time in which the flame propagation of the centre plug reaches the flame propagation of the peripheral plugs is delayed.

Description

technical field [0001] The invention relates to a spark plug system for an internal combustion engine which implements multi-point ignition in each of its cylinders. Background technique [0002] The multi-point ignition internal combustion engine disclosed in Japanese Unexamined Laid-Open Application No. H8-4641 improves the ignition rate by arranging peripheral ignition plugs or spark plugs at positions where air flow is small so that the spark of each spark plug is not easily extinguished, thereby improving the ignition rate. Achieve combustion stability. [0003] However, the known engines described above do little to reduce emissions, especially hydrocarbons, in the engine exhaust. Contents of the invention [0004] The present system provides a spark plug arrangement in an internal combustion engine that significantly reduces emissions, such as hydrocarbons, in the exhaust. [0005] More specifically, the spark plug system of the present invention includes a centra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02P15/02
CPCY02T10/125F02B2023/085F02B23/08F02P15/02F02B2275/48F02P15/08F02B31/085Y02T10/12
Inventor 伊佐治洋森浩一三石俊一
Owner NISSAN MOTOR CO LTD