A device and method for adjusting the radial installation angle of a prechamber spark plug jet

Abstract

The application discloses a device and method for adjusting the radial installation angle of the jet hole of a precombustion chamber spark plug, which comprises a sleeve, a sleeve extension rod and a torque wrench, the sleeve extension rod is connected with the sleeve, the torque wrench is arranged on the upper portion of the sleeve extension rod, the sleeve is an outer hexagonal sleeve, and the device further comprises an angle pointer and an angle scale dial, the angle scale dial is fixed on a cylinder head, and the angle pointer is buckled on the sleeve extension rod and located above the angle scale dial. The device increases the angle pointer and the angle scale dial on the basis of the sleeve extension rod and the torque wrench, can adjust the jet hole angle of the precombustion chamber spark plug, and makes the jet hole of the precombustion chamber spark plug be at an angle more favorable to the combustion in the cylinder.

Description

Technical Field

[0001] This invention relates to the field of power energy technology, and in particular to a device and method for adjusting the radial installation angle of the spark plug nozzle in the pre-combustion chamber. Background Technology

[0002] In the field of spark-ignition internal combustion engine testing, lean combustion is often used to increase the excess air coefficient in order to reduce pollutant emissions and improve engine thermal efficiency. However, lean combustion results in unstable combustion and a tendency for misfires. Using a high-energy ignition device with a pre-combustion chamber spark plug can effectively improve the misfire phenomenon and at the same time improve combustion stability.

[0003] The bottom of the pre-combustion chamber spark plug is a cylindrical cavity with evenly distributed nozzles on the outer surface of the cavity. The jet flame is ejected from the nozzles. However, in the actual installation of the pre-combustion chamber spark plug, the position of the nozzles at the bottom of the pre-combustion chamber spark plug in the cylinder is uncertain. The radial angle of the nozzles in the cylinder may be inconsistent each time the pre-combustion chamber spark plug is installed. This results in a certain degree of randomness in the distribution of the flame in the cylinder when the jet flame ejected from the nozzle ignites the air-fuel mixture after each reinstallation of the pre-combustion chamber spark plug. Existing spark plug installation tools cannot achieve the function of adjusting the nozzle angle. Summary of the Invention

[0004] This invention provides an apparatus and method for adjusting the radial installation angle of the pre-combustion chamber spark plug nozzle, which can adjust the nozzle angle of the pre-combustion chamber spark plug so that the nozzle of the pre-combustion chamber spark plug is at an angle more conducive to in-cylinder combustion.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] An adjustable device for the radial installation angle of a spark plug nozzle in a pre-combustion chamber includes a sleeve, a sleeve extension rod, and a torque wrench. The sleeve extension rod is connected to the sleeve, and the torque wrench is located on the upper part of the sleeve extension rod. The sleeve is an external hexagonal sleeve. The device also includes an angle pointer and an angle scale. The angle scale is fixed on the cylinder head, and the angle pointer is snapped onto the sleeve extension rod and located above the angle scale.

[0007] Optionally, it also includes a plastic clip for securing the angle pointer to the sleeve extension rod.

[0008] Optionally, it also includes a dial rubber fixing block, which is disposed below the angle dial.

[0009] Optionally, the angle pointer refers to the height of the extended sleeve rod at which it is installed, with reference to the height of the internal combustion engine spark plug from the upper surface of the cylinder head.

[0010] Optionally, the dial rubber fixing block, the cylinder head, and the angle dial are integrated into a single unit and do not move relative to each other.

[0011] A method for adjusting the radial installation angle of the spark plug nozzle in the pre-combustion chamber includes:

[0012] When the bottom nozzles of the pre-combustion chamber spark plug are evenly distributed and the number is greater than 6, and the angle between adjacent nozzles is less than 60 degrees, determine the preset installation torque range of the pre-combustion chamber spark plug used.

[0013] Place the pre-combustion chamber spark plug into the external hexagonal sleeve, and adjust the angle pointer so that the angle pointer and one of the nozzles of the pre-combustion chamber spark plug are in a vertical line;

[0014] Adjust the torque wrench to the preset lower limit of spark plug torque, connect the torque wrench to the upper part of the extension socket rod, and insert the angle scale and the scale rubber fixing block into the spark plug mounting hole of the cylinder head. The three are integrated as a whole and do not move relative to each other.

[0015] Insert the entire pre-combustion chamber spark plug mounting device into the mounting hole of the internal combustion engine spark plug.

[0016] Hold the torque wrench and the plastic clip with your fingers to keep them in the center position, rotate the torque wrench, and when the torque reaches the spark plug preset torque lower limit, observe the position and angle of the angle pointer on the angle scale.

[0017] Continue adjusting the torque wrench to the preset upper limit of the spark plug torque, and rotate the torque wrench to observe the position of the angle pointer on the angle scale and whether the angle reaches the target value. Measure the angle difference twice. The angle difference is the adjustment range of the spark plug nozzle angle in the pre-combustion chamber. If the target value is still not met when the torque reaches the upper limit, repeat the entire operation.

[0018] A method for adjusting the radial installation angle of the spark plug nozzle in the pre-combustion chamber includes:

[0019] When the bottom nozzles of the spark plug in the pre-combustion chamber are evenly distributed and the number is less than 6, since the angle range between adjacent nozzles is greater than 60 degrees, the test is conducted on the number of rotations and angles of the torque wrench during the entire test process when the torque reaches the preset lower limit of the spark plug torque.

[0020] The angle of the angle pointer at the instant the torque wrench is started is calculated based on the total angle when the spark plug's preset torque lower limit is reached and the radial angle of the final pre-combustion chamber spark plug nozzle.

[0021] Place the pre-combustion chamber spark plug into the external hexagonal sleeve, and adjust the angle pointer so that the angle pointer and one of the nozzles of the pre-combustion chamber spark plug are in a vertical line;

[0022] Adjust the torque wrench to the preset lower limit of spark plug torque, connect it to the torque wrench, and insert the angle dial and the dial rubber fixing block into the hole in the cylinder head. The three are integrated as a whole and do not move relative to each other.

[0023] Insert the entire pre-combustion chamber spark plug installation device into the installation area of ​​the internal combustion engine spark plug;

[0024] Hold the torque wrench and the plastic buckle with your fingers to keep them in the center position. Rotate the torque wrench by the same angle as described in the entire test process. When the torque reaches the lower limit, observe whether the rotation angle meets the range of torque wrench rotation angles throughout the entire test process, and observe whether the target value is reached.

[0025] If there is an error, use the angle difference of the torque wrench within the preset torque range to correct the angle of the pre-combustion chamber nozzle, and observe again whether the target value has been reached. If it still cannot be reached, repeat the entire operation described above.

[0026] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0027] This invention provides a device for adjusting the radial installation angle of the pre-combustion chamber spark plug nozzle. Based on the sleeve extension rod and torque wrench, an angle pointer and an angle scale are added to adjust the nozzle angle of the pre-combustion chamber spark plug, so that the nozzle of the pre-combustion chamber spark plug is at an angle that is more conducive to in-cylinder combustion. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the installation of the device for adjusting the radial installation angle of the spark plug nozzle in the pre-combustion chamber according to the present invention.

[0030] Figure 2 This is a three-dimensional view of the device for adjusting the radial installation angle of the spark plug nozzle in the pre-combustion chamber according to the present invention.

[0031] Figure 3 This is a cross-sectional view of the device for adjusting the radial installation angle of the spark plug nozzle in the pre-combustion chamber according to the present invention. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] This invention provides an apparatus and method for adjusting the radial installation angle of the pre-combustion chamber spark plug nozzle, which can adjust the nozzle angle of the pre-combustion chamber spark plug so that the nozzle of the pre-combustion chamber spark plug is at an angle more conducive to in-cylinder combustion.

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Due to the shortcomings of existing technologies, there is an urgent need for a tool that can adjust the angle of the pre-combustion chamber nozzle within the cylinder, so that after each spark plug replacement, the radial direction of the nozzle can be adjusted to the angle most favorable for in-cylinder combustion. This invention provides a device and method for positioning and adjusting the installation position of the bottom nozzle of a pre-combustion chamber spark plug to adjust the nozzle angle, thereby placing the nozzle at a more favorable angle for in-cylinder combustion.

[0036] like Figure 1-3 As shown, this invention provides a device for adjusting the radial installation angle of the spark plug nozzle in the pre-combustion chamber. The device includes a sleeve, a sleeve extension rod, and a torque wrench. The sleeve extension rod is connected to the sleeve, and the torque wrench is located on the upper part of the sleeve extension rod. The sleeve is an external hexagonal sleeve. It also includes an angle pointer 2 and an angle scale 4. The angle scale 4 is fixed to the cylinder head, and the angle pointer 2 is snapped onto the sleeve extension rod and located above the angle scale 4. The external hexagonal sleeve is a magnetically attached external hexagonal sleeve.

[0037] The device also includes a plastic clip 3 and a scale rubber fixing block 5. The plastic clip 3 is used to fix the angle pointer 2 to the sleeve extension rod. The scale rubber fixing block 5 is located below the angle scale.

[0038] The angle pointer 2 refers to the height of the extended sleeve rod at which the spark plug is positioned relative to the upper surface of the cylinder head. The dial rubber fixing block 5, the cylinder head, and the angle dial 4 form a single unit and do not move relative to each other.

[0039] When installing the pre-combustion chamber spark plug, the radial installation angle of its bottom nozzle is uncertain. This device and method can determine the installation angle and adjust it to the target installation angle.

[0040] The installation steps for this device are as follows:

[0041] After installing the pre-combustion chamber spark plug at the bottom of the sleeve, install the angle scale 4 and the scale rubber fixing block 5 together. Insert the assembled whole onto the sleeve rod and insert the whole assembly into the upper end of the internal combustion engine cylinder head, i.e., the spark plug installation hole. The inner side is inserted into the lower tube component of the angle scale 4. The scale rubber fixing block 5, the cylinder head, and the angle scale 4 form a whole and do not move relative to each other. Install the angle pointer 2 and the plastic clip 3 on the sleeve rod. The installation height is referenced to the height of the internal combustion engine spark plug from the upper surface of the cylinder head.

[0042] Functions of each component: upper part of the socket 1, torque wrench connection point, socket rod 6, lower part of the magnetic external hexagonal socket 7. Components 1, 6, and 7 form a unit. Angle pointer 2, used to determine the rotation angle of the spark plug in the pre-combustion chamber, is made of heat-resistant plastic. The contact point with the sleeve rod is made of heat-resistant rubber to increase friction and prevent relative rotation between them. A plastic clip 3 secures angle pointer 2. The angle scale 4 is evenly divided into four sections, each with an angle from 0 to 90 degrees, each having 90 graduations. The angle scale 4 is fitted onto the central axis of the scale by a scale rubber fixing block 5, preventing relative displacement between the angle scale 4 and the scale rubber fixing block 5. The outer side of the scale rubber fixing block 5 is inserted into the upper end of the internal combustion engine cylinder head, i.e., the top of the spark plug mounting hole. The inner side of the scale rubber fixing block 5 is inserted into the lower tube component of the angle scale 4. The scale rubber fixing block 5, the cylinder head, and the angle scale 4 form a single unit, preventing relative movement. The sleeve rod 6 extends the external hexagonal sleeve, and the magnetic external hexagonal sleeve 7 secures the spark plug. The sleeve has an inner cavity of 8. Considering that the length of the wiring nut varies for different spark plug models, the design is relatively long.

[0043] This invention provides a method for adjusting the radial installation angle of the spark plug nozzle in the pre-combustion chamber, the method comprising:

[0044] When the bottom nozzles of the pre-combustion chamber spark plug are evenly distributed and the number is greater than 6, and the angle between adjacent nozzles is less than 60 degrees, determine the preset installation torque range of the pre-combustion chamber spark plug used.

[0045] Place the pre-combustion chamber spark plug into the external hexagonal sleeve, and adjust the angle pointer 2 so that the angle pointer 2 and one of the nozzles of the pre-combustion chamber spark plug are in a vertical line;

[0046] Adjust the torque wrench to the preset lower limit of spark plug torque, connect the torque wrench to the upper part of the extension socket rod, and insert the angle scale 4 and the scale rubber fixing block 5 into the spark plug mounting hole of the cylinder head. The three are integrated into one unit and do not move relative to each other.

[0047] Insert the entire pre-combustion chamber spark plug mounting device into the mounting hole of the internal combustion engine spark plug.

[0048] Hold the torque wrench and the plastic buckle 3 with your fingers to keep them in the center position, rotate the torque wrench, and when the torque reaches the spark plug preset torque lower limit, observe the position and angle of the angle pointer 2 on the angle scale 4.

[0049] Continue adjusting the torque wrench to the preset upper limit of the spark plug torque, and rotate the torque wrench to observe whether the position and angle of the angle pointer 2 on the angle scale 4 have reached the target value. Measure the angle difference twice. The angle difference is the adjustment range of the spark plug nozzle angle in the pre-combustion chamber. If the target value is still not met when the torque reaches the upper limit, repeat the entire operation.

[0050] The present invention also provides a second method for adjusting the radial installation angle of the spark plug nozzle in the pre-combustion chamber, the second method comprising:

[0051] When the bottom nozzles of the spark plug in the pre-combustion chamber are evenly distributed and the number is less than 6, since the angle range between adjacent nozzles is greater than 60 degrees, the test is conducted on the number of rotations and angles of the torque wrench during the entire test process when the torque reaches the preset lower limit of the spark plug torque.

[0052] The angle of the angle pointer 2 at the instant the torque wrench is started is calculated based on the total angle when the spark plug's preset torque lower limit is reached and the radial angle of the final pre-combustion chamber spark plug nozzle.

[0053] Place the pre-combustion chamber spark plug into the external hexagonal sleeve, and adjust the angle pointer 2 so that the angle pointer 2 and one of the nozzles of the pre-combustion chamber spark plug are in a vertical line;

[0054] Adjust the torque wrench to the preset lower limit of spark plug torque, connect it to the torque wrench, and insert the angle scale 4 and the scale rubber fixing block 5 into the hole of the cylinder head. The three are integrated as a whole and do not move relative to each other.

[0055] Insert the entire pre-combustion chamber spark plug installation device into the installation area of ​​the internal combustion engine spark plug;

[0056] Hold the torque wrench and the plastic buckle 3 with your fingers to keep them in the center position. Rotate the torque wrench by the same angle as described in the entire test process. When the torque reaches the lower limit, observe whether the rotation angle meets the range of torque wrench rotation angles throughout the entire test process, and observe whether the target value is reached.

[0057] If there is an error, use the angle difference of the torque wrench within the preset torque range to correct the angle of the pre-combustion chamber nozzle, and observe again whether the target value has been reached. If it still cannot be reached, repeat the entire operation described above.

[0058] The difference between the two methods is that in Method 1, there are more nozzles and the angle between adjacent nozzles is smaller. The radial angle of the spark plug nozzles can be adjusted by using the torque range difference caused by the preset torque range of the spark plug. In Method 2, the angle between adjacent nozzles is larger. Adjusting the angle difference of the torque range alone cannot meet the target requirements. Therefore, it is necessary to calculate the required rotation angle and the angle of the spark plug nozzles when the torque wrench is turned at the beginning. Then, the angle difference of the torque range is used to correct the error with the target value. The angle difference of the torque range is used for adjustment in Method 1 and for correction in Method 2.

[0059] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to the method section.

[0060] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for adjusting the radial installation angle of the jet hole of a prechamber spark plug, which is based on a device for adjusting the radial installation y angle of the jet hole of a prechamber spark plug, which comprises a sleeve, a sleeve extension rod and a torque wrench, the sleeve extension rod and the sleeve are connected, the torque wrench is arranged at the upper part of the sleeve extension rod, the sleeve is an outer hexagonal sleeve, and the device further comprises: The device includes an angle pointer and an angle scale, the angle scale being fixed to the cylinder head, and the angle pointer being snapped onto the sleeve extension rod and positioned above the angle scale. The device also includes a plastic clip for securing the angle pointer to the sleeve extension rod. Furthermore, the device includes a scale rubber fixing block positioned below the angle scale. The installation height of the angle pointer on the sleeve extension rod is referenced to the height from the spark plug to the upper surface of the cylinder head in an internal combustion engine. The graduated dial rubber fixing block, the cylinder head, and the angle graduated dial form a whole, and do not move relative to each other; the method is characterized by comprising: When the bottom nozzles of the pre-combustion chamber spark plug are evenly distributed and the number is greater than 6, and the angle between adjacent nozzles is less than 60 degrees, determine the preset installation torque range of the pre-combustion chamber spark plug used. Place the pre-combustion chamber spark plug into the external hexagonal sleeve, and adjust the angle pointer so that the angle pointer and one of the nozzles of the pre-combustion chamber spark plug are in a vertical line; Adjust the torque wrench to the preset lower limit of spark plug torque, connect the torque wrench to the upper part of the socket extension rod, and insert the angle scale and the scale rubber fixing block into the spark plug mounting hole of the cylinder head. The three are integrated as a whole and do not move relative to each other. Insert the entire pre-combustion chamber spark plug mounting device into the mounting hole of the internal combustion engine spark plug. Hold the torque wrench and the plastic clip with your fingers to keep them in the center position, rotate the torque wrench, and when the torque reaches the spark plug preset torque lower limit, observe the position and angle of the angle pointer on the angle scale. Continue adjusting the torque wrench to the preset upper limit of the spark plug torque, and rotate the torque wrench to observe the position of the angle pointer on the angle scale and whether the angle reaches the target value. Measure the angle difference twice. The angle difference is the adjustment range of the spark plug nozzle angle in the pre-combustion chamber. If the target value is still not met when the torque reaches the upper limit, repeat the entire operation.

2. A method based on an adjustable radial installation angle of a pre-combustion chamber spark plug nozzle, the method being based on a device for adjusting the radial installation angle of a pre-combustion chamber spark plug nozzle, the device comprising a sleeve, a sleeve extension rod, and a torque wrench, the sleeve extension rod being connected to the sleeve, the torque wrench being disposed on the upper part of the sleeve extension rod, the sleeve being an external hexagonal sleeve, the device further comprising: The device includes an angle pointer and an angle scale, the angle scale being fixed to the cylinder head, and the angle pointer being snapped onto the sleeve extension rod and positioned above the angle scale. The device also includes a plastic clip for securing the angle pointer to the sleeve extension rod. Furthermore, the device includes a scale rubber fixing block positioned below the angle scale. The installation height of the angle pointer on the sleeve extension rod is referenced to the height from the spark plug to the upper surface of the cylinder head in an internal combustion engine. The graduated dial rubber fixing block, the cylinder head, and the angle graduated dial form a whole, and do not move relative to each other; the method is characterized by comprising: When the bottom nozzles of the spark plug in the pre-combustion chamber are evenly distributed and the number is less than 6, since the angle range between adjacent nozzles is greater than 60 degrees, the test is conducted on the number of rotations and angles of the torque wrench during the entire test process when the torque reaches the preset lower limit of the spark plug torque. The angle of the angle pointer at the instant the torque wrench is started is calculated based on the total angle when the spark plug's preset torque lower limit is reached and the radial angle of the final pre-combustion chamber spark plug nozzle. Place the pre-combustion chamber spark plug into the external hexagonal sleeve, and adjust the angle pointer so that the angle pointer and one of the nozzles of the pre-combustion chamber spark plug are in a vertical line; Adjust the torque wrench to the preset lower limit of spark plug torque, connect it to the torque wrench, and insert the angle dial and the dial rubber fixing block into the hole in the cylinder head. The three are integrated as a whole and do not move relative to each other. Insert the entire pre-combustion chamber spark plug installation device into the installation area of ​​the internal combustion engine spark plug; Hold the torque wrench and the plastic buckle with your fingers to keep them in the center position. Rotate the torque wrench by the same angle as described in the entire test process. When the torque reaches the lower limit, observe whether the rotation angle meets the range of torque wrench rotation angles throughout the entire test process, and observe whether the target value is reached. If there is an error, use the angle difference of the torque wrench within the preset torque range to correct the angle of the pre-combustion chamber nozzle, and observe again whether the target value has been reached. If it still cannot be reached, repeat the entire operation described above.

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