CN106894934A - Spark plug and the engine with spark plug - Google Patents

Abstract

The invention discloses a spark plug, which comprises a spark plug shell, and the spark plug shell is provided with an air inlet and an air passage connected with the air inlet, the air passage can communicate with a sealed chamber, and the sealed chamber communicates with a pre-combustion chamber . When the pressure in the sealed chamber is lower than the preset value, the switch is opened, and the sealed chamber is connected to the air passage. At this time, the required pure gas or gas mixture with a high concentration can enter the air passage through the air inlet and then enter the air passage again. It enters the pre-combustion chamber through the sealed chamber, and then enters the combustion chamber. In the above method, after the pressure in the combustion chamber drops, the spark plug can provide the pre-combustion chamber with high-concentration gas to increase the combustible gas composition in the pre-combustion chamber and ensure the normal start and operation of the engine. The invention also discloses an engine with the above spark plug.

Description

Spark plugs and engines with spark plugs

technical field

The invention relates to the technical field of engines, in particular to an engine and an electronically controlled oil pump thereof.

Background technique

In the existing pre-chamber spark plug, gas and air can only enter through the injection hole of the pre-chamber structure integrated with the spark plug.

Since the gas enters the pre-combustion chamber from the injection hole, the gas composition of the pre-combustion chamber comes from the mixed gas in the cylinder. If the air-fuel ratio in the gas in the cylinder is too high, the combustible components in the pre-combustion chamber will be too low, and the electric spark generated by the spark plug cannot be ignited. Gas in the pre-combustion chamber, the problem of engine misfire.

Therefore, how to increase the combustible gas composition to ensure the stable operation of the engine is a technical problem to be solved by those skilled in the art.

Contents of the invention

In view of this, the present invention provides a spark plug, which increases the composition of combustible gas to ensure the stable operation of the engine. The present invention also provides an engine with the above-mentioned spark plug.

To achieve the above object, the present invention provides the following technical solutions:

A spark plug, including a spark plug housing, which also includes:

air supply device;

an air inlet opened on the spark plug housing and capable of communicating with the air supply device;

An air passage communicating with the air inlet, one end of the air passage is blocked;

A sealed chamber communicated with the pre-combustion chamber, the sealed chamber communicates with the other end of the air passage, and a switch element capable of blocking the air passage is arranged in the air passage, when the pressure in the sealed chamber is low At a preset value, the switch element is opened, and the sealed chamber communicates with the air passage.

Preferably, in the above-mentioned spark plug, the air channel extends along the axis of the spark plug housing, and the end away from the pre-chamber is blocked, and the side close to the pre-chamber communicates with the sealed chamber .

Preferably, in the above-mentioned spark plug, the air passage is blocked by a wire plug.

Preferably, in the above spark plug, the switch element is a pressure switch valve.

Preferably, in the above-mentioned spark plug, the sealed chamber communicates with the pre-combustion chamber through an oblique air passage.

Preferably, in the above-mentioned spark plug, the inner cavity of the spark plug housing is provided with:

spiral wire;

a terminal screw connected to said helical wire;

The insulator is sheathed on the outside of the terminal screw, and the insulator is limited in contact with the inner cavity of the spark plug housing through a seal and a washer.

Preferably, in the above spark plug, the air supply device is an air supply joint, and the air supply device is sleeved on the outside of the spark plug housing through a sealing ring.

Preferably, in the above-mentioned spark plug, the lower side of the air supply device is limited against the boss of the spark plug housing, and the upper side is limited on the spark plug housing by pressing bolts.

An engine, including a spark plug, wherein the spark plug is the spark plug described in any one of the above.

It can be seen from the above-mentioned technical solutions that the present invention discloses a spark plug, which includes a spark plug housing, and the spark plug housing is provided with an air inlet and an air passage communicating with the air inlet, the air passage can communicate with the sealed chamber, and The sealed chamber communicates with the pre-combustion chamber. When the pressure in the sealed chamber is lower than the preset value, the switch is opened, and the sealed chamber is connected to the air passage. At this time, the required pure gas or gas mixture with a high concentration can enter the air passage through the air inlet and then enter the air passage again. It enters the pre-combustion chamber through the sealed chamber, and then enters the combustion chamber. In the above method, after the pressure in the combustion chamber drops, the spark plug can provide the pre-combustion chamber with high-concentration gas to increase the combustible gas composition in the pre-combustion chamber and ensure the normal start and operation of the engine.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is a cross-sectional view of a spark plug provided by an embodiment of the present invention.

detailed description

The core of the invention is to provide a spark plug which increases the composition of combustible gas to ensure the stable operation of the engine. Another core of the present invention is to provide an engine with the above-mentioned spark plug.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Fig. 1, the present invention discloses a spark plug, including a spark plug housing 1, an air inlet 4 and an air passage 5 communicating with the air inlet 4 are opened on the spark plug housing 1, and the air passage 5 can be connected with the air inlet 4. The sealed chamber 6 communicates, and the sealed chamber 6 communicates with the pre-combustion chamber. When the pressure in the sealed chamber 6 is lower than the preset value, the switch is opened, and the sealed chamber 6 is connected to the air passage 5. At this time, the required pure gas or a gas mixture with a relatively high concentration can pass through the air inlet 4 Enter the air channel 5 and then enter the pre-combustion chamber through the sealed chamber 6, and then enter the combustion chamber. In the above method, after the pressure in the combustion chamber drops, the spark plug can provide the pre-combustion chamber with high-concentration gas to increase the combustible gas composition in the pre-combustion chamber and ensure the normal start and operation of the engine.

The air supply device 11 is integrated in the spark plug to improve the air-fuel ratio of the engine, optimize its emission and economy, and solve the problem of excessive NOx caused by excessive volume of the pre-combustion chamber in the cylinder head or liner with pre-combustion chamber structure.

The air inlet mentioned above can be communicated with the gas supply device 11, so as to fill the gas passage 5 with pure gas or a gas mixture with a higher concentration through the gas supply device 11. Since the air passage 5 is directly processed in the existing spark plug structure, one end of the air passage 5 communicates with the outside world. In order to prevent gas leakage, it is necessary to block the end of the air passage 5 communicating with the outside world. The other end communicates with the sealed chamber 6. As for the sealing method of the air passage 5, the wire plug 3 can be used for sealing. In practice, the air passage 5 can also be blocked with a rubber plug, as long as the air passage 5 can be blocked.

The air channel 5 in the present application extends along the axis of the spark plug housing 1 , specifically, the axis of the air channel 5 is parallel to the axis of the spark plug housing 1 . Since the gas channel 5 is directly processed on the existing spark plug housing 1, it is necessary to block the end away from the pre-chamber, that is, the side communicating with the outside world, and the side close to the pre-chamber to be sealed Storehouse 6 is connected.

In a specific embodiment, the above-mentioned switch element is a pressure switch valve. Specifically, the pressure switch valve includes a valve body, a spring connected to the valve body, and a spring seat connected to the spring.

When the piston goes down, the pressure in the pre-combustion chamber drops. Since the pre-chamber is connected with the sealed chamber 6, the pressure in the sealed chamber 6 drops synchronously. When the pressure of the gas is subtracted from the elastic force of the spring, the valve body is pushed open, that is, the pressure switch valve is opened, and the gas or high-concentration gas mixture enters the sealed chamber 6 through the gas channel and then enters the inside of the pre-combustion chamber.

When the piston moves upward, the internal pressure of the pre-combustion chamber increases, causing the pressure in the sealed chamber 6 to increase. Under the action of the spring, the valve body is closed, that is, the pressure switch valve is closed.

In a further embodiment, the spark plug also includes an oblique air passage 7, which communicates with the sealed chamber 6 and the pre-combustion chamber. Since the oblique air passage 7 is directly opened on the existing spark plug, it is necessary to block the side of the oblique air passage 7 communicating with the outside world to prevent leakage. For the blocking method, a metal wire plug or a rubber plug can be used. The size and inclination angle of the oblique air passage 7 can be set according to different needs, and all are within the protection range.

In a preferred embodiment, the inner cavity of the spark plug housing 1 is provided with a helical wire 2 , a terminal screw 9 and an insulator 10 . The spiral wire 2 is connected to the terminal screw 9, and the insulator 10 is sleeved on the outside of the terminal screw 9, and the insulator 10 is limited in the inner cavity of the spark plug housing 1 by a seal and a washer. The above-mentioned structure is to realize the spark plug itself. The structure of the function is the same as the structure and connection mode in the prior art.

The air supply device 11 of the engine in this application is an air supply joint, which is sleeved on the spark plug housing 1 through a sealing ring 12, and the lower side of the air supply device 11 is against the boss of the spark plug housing 1, and the upper side is pressed The tightening bolt 13 is limited on the spark plug housing, and a connection method between the air supply device 11 and the spark plug is provided here, but the application is not limited thereto, as long as the air supply device can supply air to the air passage through the air inlet. The way of gas is within the scope of protection, and the gas supply device can be fixed according to different needs.

In addition, the present application also discloses an engine, including a spark plug, wherein the spark plug is the spark plug disclosed in the above embodiment, therefore, the engine with the spark plug also has all the technical effects mentioned above, which will not be repeated here. Above-mentioned spark plug is installed in the engine spark plug installation hole.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A spark plug, comprising a spark plug housing (1), is characterized in that, also includes: Air supply device (11); an air inlet (4) provided on the spark plug housing (1) and capable of communicating with the air supply device (11); An air passage (5) communicated with the air inlet (4), one end of the air passage (5) is blocked; A sealed chamber (6) communicated with the pre-combustion chamber, the sealed chamber (6) communicated with the other end of the air channel (5), and the air channel is provided with a valve capable of blocking the air channel (5) A switch part, when the pressure in the sealed chamber (6) is lower than a preset value, the switch part is opened, and the sealed chamber (6) is in communication with the air channel (5). 2. The spark plug according to claim 1, characterized in that, the air passage (5) extends along the axial direction of the spark plug housing (1), and is blocked at one end away from the pre-combustion chamber, close to the One side of the pre-combustion chamber communicates with the sealed chamber (6). 3. The spark plug according to claim 2, characterized in that the air channel (5) is blocked by a wire plug (3). 4. The spark plug according to claim 1, characterized in that, the switching element is a pressure switching valve. 5. The spark plug according to claim 1, characterized in that, the sealed chamber (6) communicates with the pre-combustion chamber through an oblique air channel (7). 6. The spark plug according to any one of claims 1-5, characterized in that, the inner cavity of the spark plug housing (1) is provided with: Spiral wire (2); A terminal screw (9) connected to the spiral wire (2); The insulator (10) is sleeved on the outside of the terminal screw (9), and the insulator (10) is limited in contact with the inner cavity of the spark plug housing (1) through a seal and a washer. 7. The spark plug according to any one of claims 1-5, characterized in that, the gas supply device (11) is a gas supply joint, and the gas supply device (11) is sleeved on the The outer side of the spark plug housing (1). 8. The spark plug according to claim 7, characterized in that, the lower side of the air supply device (11) is limited against the boss of the spark plug housing (1), and the upper side is passed through the compression bolt (13 ) is limited on the spark plug housing (1). 9. An engine comprising a spark plug, characterized in that the spark plug is the spark plug according to any one of claims 1-8.