Double-umbrella-shaped electrode spark plug

Abstract

The invention provides a double umbrella-shaped electrode spark plug, and belongs to the technical field of engine parts. The double umbrella-shaped electrode spark plug comprises an umbrella-shaped central electrode, an umbrella-shaped earth electrode and a spark plug body, wherein a mounting bracket extends out of the spark plug body, the umbrella-shaped central electrode is arranged on the spark plug body, the umbrella-shaped earth electrode is mounted on the mounting bracket, a central electrode noble metal head is arranged on the umbrella-shaped central electrode, the umbrella-shaped earth electrode is provided with an earth electrode noble metal head, the central electrode noble metal head and the earth electrode noble metal head are oppositely arranged, and one side, close to the mounting bracket, of the umbrella-shaped central electrode is partially removed, so that the distance between the central electrode noble metal head and the earth electrode noble metal head is smaller than that between the umbrella-shaped central electrode and the mounting bracket. According to the double umbrella-shaped electrode spark plug, on the premise that the breakdown voltage is not increased, under the action of a flow field in an engine cylinder, a plasma channel can be effectively lengthened, so that the phenomena of shortening and re-breakdown are reduced, and the ignition performance is improved.

Description

technical field [0001] The invention relates to the technical field of engine components, in particular to a spark plug with double umbrella electrodes. Background technique [0002] The combustion process of an internal combustion engine directly determines the engine's thermal efficiency, emissions, and other performance. For ignition engines such as gasoline engines and gas engines, the spark ignition process directly affects the entire combustion process and has a direct effect on combustion cycle fluctuations. The spark discharge process is divided into three parts: breakdown, arc discharge and glow discharge. The breakdown process forms an effective plasma channel, and the plasma channel, as an ignition source, has been maintained in the arc and glow stages, and most of the ignition energy is released in the glow discharge stage. With the use of dilution combustion technology, the flow field in the cylinder is further strengthened, and the strong flow field near the s...

AI Technical Summary

Problems solved by technology

However, an excessively long electrode gap is not conducive to the breakdown process. The larger the gap, the greater the required breakdown voltage, which poses a challenge to the ignition device

[0004] Patent document CN208368945U discloses a Y-shaped side electrode spark plug, including a connection nut, a connection screw, an insulator part, a shell part, an outer sealing gasket, an inner sealing gasket, a center electrode and a side electrode, and it is characterized in that the side electrode It is set in a Y-shaped structure, and the opening of the Y-shaped structure is directly at the center of the central electrode, but the structure of this design is unreasonable, and this structure cannot overcome the influence of the strong flow field on the shortening or blowing off of the plasma channel

Images