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Spark plug with precombustion chamber structure

A technology of spark plugs and pre-combustion chambers, which is applied in the field of engines, can solve problems such as the decrease of combustion rate, achieve the effects of increasing expansion ratio, increasing turbulence intensity, and reducing difficulty and cost

Inactive Publication Date: 2019-02-22
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to propose a spark plug with a pre-chamber structure to alleviate or eliminate the problem of reduced combustion rate that occurs when using the Miller / Atkinson cycle

Method used

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  • Spark plug with precombustion chamber structure
  • Spark plug with precombustion chamber structure
  • Spark plug with precombustion chamber structure

Examples

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with accompanying drawing.

[0017] Such as Figure 1 to Figure 4 Shown is a spark plug with a pre-combustion chamber structure, the spark plug includes a tubular metal shell 1, an insulator 2 fixed in the metal shell 1, a central hole arranged in the insulator 2, and an insulator installed in the central hole The center electrode 3 and the side electrode 4 connected to the metal shell 1 form a spark plug gap between the center electrode 3 and the side electrode 4, and the lower end of the metal shell 1 is connected with a pre-chamber shell 5, and the pre-chamber shell 5 and The lower end of the metal shell 1 encloses a pre-chamber, and the spark plug gap is located in the pre-chamber chamber. The pre-chamber housing 5 is provided with a plurality of upper injection holes 6 uniformly arranged around the central axis of the spark plug and a plurality of nozzles around the central axis of the spark plug....

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Abstract

The invention relates to a spark plug with a precombustion chamber structure. The spark plug includes a tubular metal shell, an insulator fixed in the metal shell, a central hole arranged in the insulator, a central electrode mounted in the central hole and a side electrode connected to the metal shell. A spark plug gap is formed between the central electrode and the side electrode. A precombustion chamber shell is connected to the lower end of the metal shell. A precombustion chamber is defined by the lower ends of the precombustion chamber shell and the metal shell. The spark plug gap is located in the precombustion chamber. The precombustion chamber shell is provided with multiple upper spray holes and multiple lower spray holes. The multiple spray holes are located on the upper side ofthe multiple lower spray holes. The spark plug with the precombustion chamber structure can form up-down stratified jet flames with different spray cone angels during a combustion process of an engine, thereby accelerating the combustion of mixed gas, effectively solving the problem of decrease of burning rate when a gasoline engine adopts a Miller / Atkinson cycle, ensuring the ignition stability,and avoiding carbon deposition blockage.

Description

technical field [0001] The invention relates to an engine, in particular to a spark plug with a pre-combustion chamber structure. Background technique [0002] Hybrid power is one of the important technical paths for automobiles to cope with increasingly stringent emission regulations and fuel consumption regulations, and has become a hot research topic in the automotive industry. Hybrid power can reduce the power demand on the engine through the assistance of the motor, and at the same time optimize the operating conditions of the engine. In this case, the engine often uses the Miller / Atkinson cycle to further reduce fuel consumption under partial load conditions, thereby improving the overall economy. The Miller cycle and the Atkinson cycle use the early closing and late closing of the intake valve to effectively increase the engine expansion ratio while ensuring that the effective compression ratio is not significantly increased, thereby improving the theoretical thermal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01T13/02H01T13/06
CPCH01T13/02H01T13/06
Inventor 闫博文张晓宇刘斌王显刚邓伟余小草袁少伟
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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