Plasma ignition sparking plug for internal combustion engine

Abstract

The invention discloses a plasma ignition sparking plug for an internal combustion engine, belonging to the plasma ignition device of the internal combustion engine. A section of a second insulator is arranged and a section of an ionization cavity is formed between the grounding electrode and the central electrode of the sparking plug, the first insulator covers outside the grounding electrode, and a shell is arranged on the lower half part of the first insulator. A little of combustible mixture entering the ionization cavity can be ionized and ignited by the parking plug, so as to spray the combustible mixture from a spray orifice in a way of pillar of flame. The pillar of flame sprayed from the spray orifice is equivalent to a combustion source with infinitely amplified ignition energy, so that the combustible mixture in a combustor can be quickly fired, and the combustion stability of a lean-burn engine can be improved and the lean-burn limitation of the engine can be expanded, so as to improve the economy of the engine; the engine works under a lean-burn condition, so that the combustion temperature can be controlled, and the discharging level of NOX (Nitric Oxide) can be reduced.

Description

technical field [0001] The invention relates to a plasma ignition spark plug for an internal combustion engine, belonging to a plasma ignition device for an internal combustion engine. Background technique [0002] Lean burn is a research direction that has attracted much attention in the field of internal combustion engine research in recent years. The fuel is burned under the condition that the equivalence ratio is less than the stoichiometric ratio, which can effectively improve the combustion efficiency, thereby improving fuel economy and reducing HC and CO emissions; at the same time, due to the lower combustion temperature, compared with stoichiometric combustion , lean-burn NO X Emissions are also lower. Therefore, engine lean combustion technology has broad application prospects. However, fuel ignition is more difficult under lean conditions, which can lead to erratic engine operation. Moreover, when the engine is operating near the lean burn limit, the problem o...

AI Technical Summary

Problems solved by technology

However, fuel ignition is more difficult under lean conditions, which can lead to erratic engine operation

Moreover, when the engine is operating near the lean burn limit, the problem of ignition difficulty will be exacerbated, which will lead to increased engine cycle variation, deterioration of HC and CO emissions, and thus affect the overall performance of the engine

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