CN221169766U - Engine cylinder sealing structure, engine and engineering equipment - Google Patents

Abstract

The utility model relates to the technical field of engines and discloses an engine cylinder sealing structure, an engine and engineering equipment, wherein the engine cylinder sealing structure comprises a cylinder gasket, a cylinder body and a cylinder cover, wherein the cylinder gasket is arranged between the cylinder body and the cylinder cover of an engine cylinder, and is provided with a pressure wave which is arranged around a cylinder opening of the engine cylinder; the cylinder abutting end face is arranged at one end of a cylinder body of the engine cylinder, which faces a cylinder cover of the engine cylinder, or at one end of a cylinder sleeve of the engine cylinder, which faces the cylinder cover of the engine cylinder, and is suitable for abutting with a cylinder gasket to form sealing, the cylinder abutting end face is provided with a thickness reducing groove, and the edge of the thickness reducing groove, which is close to one side of a compression wave, is positioned between the compression wave and a cylinder opening of the engine cylinder.

Description

Engine cylinder sealing structure, engine and engineering equipment

Technical Field

The utility model relates to the technical field of engines, in particular to an engine cylinder sealing structure, an engine and engineering equipment.

Background

The engine is an important component of modern power machinery, and the working principle is that fuel is mixed with air in an engine cylinder and combusted, and high-temperature and high-pressure gas is generated to push a piston to reciprocate, so that a connecting rod mechanism is driven to output torque. With the increasing demands on engines in industry, engines often need to increase detonation pressure to increase fuel economy, but the increase in detonation pressure can reduce the reliability of cylinder port seals.

In the related art, the sealing at the cylinder opening of the cylinder is realized by respectively abutting the cylinder gasket with the cylinder opening and the cylinder cover, or by respectively abutting the cylinder gasket with the end part of the cylinder sleeve and the cylinder cover, in order to improve the sealing effect, a mode of locally thickening at the sealing part is generally adopted, or the cylinder gasket and the cylinder opening are tightly pressed through a fastener.

However, the sealing effect of the sealing mode is not ideal under the environment with higher detonation pressure, and the requirement of the high detonation pressure engine on the sealing effect cannot be met.

Disclosure of utility model

In view of the above, the utility model provides an engine cylinder sealing structure, an engine and engineering equipment, which are used for solving the problem that the sealing effect between a cylinder gasket and a cylinder port or between the cylinder gasket and the end part of a cylinder sleeve is not ideal under the environment of high explosion pressure.

In a first aspect, the present utility model provides an engine cylinder seal arrangement comprising: the cylinder gasket is arranged between a cylinder body and a cylinder cover of the engine cylinder, and is provided with a compression wave which is arranged around a cylinder opening of the engine cylinder; the thickness reduction groove is formed in the end, facing the cylinder cover, of the cylinder body of the engine cylinder, or the end, facing the cylinder sleeve of the engine cylinder, of the cylinder cover is provided with a tight end face, the tight end face is suitable for being abutted to the cylinder gasket to form sealing, the thickness reduction groove is formed in the tight end face, and the edge, close to one side of the compression wave, of the thickness reduction groove is located between the compression wave and a cylinder opening of the engine cylinder.

The beneficial effects are that: through set up the cylinder block between the cylinder block of engine cylinder and cylinder cap to set up the ripples that press on the cylinder block, when the cylinder block of engine compresses tightly with the cylinder cap, the cylinder block of engine and cylinder cap butt respectively in the both sides of the ripples department of cylinder block, thereby form sealed face in butt position, because sealed face department is powerful, thereby promote sealed effect. In addition, through seting up the groove that subtracts thickness at the cylinder tight terminal surface, make the butt area of cylinder pad and engine cylinder body or the cylinder tight terminal surface of engine cylinder liner further reduce, promoted the pressure of sealed face to also promoted the pressure of pressure ripples structure department, made the pressure ripples structure fully warp and closely support with the cylinder cap of engine cylinder, cylinder body or cylinder liner tip, promoted sealed effect.

In an alternative embodiment, the reduced thickness groove has a groove depth in the range of 0.03 mm to 0.05 mm.

The beneficial effects are that: through limiting the groove depth of the thickness reduction groove within the range of 0.03 mm to 0.05 mm, on one hand, the range of compression deformation of the cylinder gasket is limited while the contact area of the cylinder gasket and the cylinder abutting end face is guaranteed to be reduced, on the other hand, the influence of the structural strength of the grooving multi-engine cylinder is avoided, excessive deformation of the cylinder gasket when the cylinder gasket is compressed due to the groove depth is prevented, and the possibility of the sealing effect at the compression wave position is further influenced.

In an alternative embodiment, the distance between the edge of the reduced thickness groove on the side remote from the cylinder opening of the corresponding engine cylinder and the pressure wave edge is in the range of 1 mm to 5 mm.

The beneficial effects are that: through limiting the distance between the edge of the thickness reduction groove and the edge of the pressure wave to be 1 mm to 5mm, on one hand, the notch range of the thickness reduction groove is expanded as much as possible, so that the contact area of a cylinder gasket and a cylinder abutting end face is reduced to improve pressure intensity, on the other hand, the influence of factors such as tolerance and installation error and the like is avoided, the sealing structure caused by the too close distance between the sealing surface of the edge position of the thickness reduction groove and the sealing surface of the pressure wave is mutually interfered, and the possibility of affecting the sealing effect is improved.

In an alternative embodiment, a rounded bottom corner of a side groove wall of the reduced thickness groove, which is far away from a cylinder opening of the engine cylinder, is arranged.

The beneficial effects are that: through setting up the radius in the border department of subtracting thick groove, reduce the cylinder on the one hand and support tight terminal surface and lie in the possibility that the edge produces stress concentration and lead to the border structure to be destroyed in thick groove edge department, thereby on the other hand has promoted the homogeneity degree of laminating between thick groove border and the jar pad through setting up the radius and has promoted sealed effect, and reduce jar pad be located with the position of thick groove border butt because the atress uneven and produce inelastic deformation in the part, cause the possibility of structural damage, in addition, carry out the possibility that the burr appears in the edge can effectively be avoided in the processing of rounding, promote structural flatness and avoid the burr to influence sealed effect.

In an alternative embodiment, the radius ranges from 0.4 mm to 0.8 mm in diameter.

The beneficial effects are that: the possibility of stress concentration is further reduced by limiting the diameter of the rounding to be between 0.4 mm and 0.8mm, so that the stress on the edge of the thickness reduction groove is more uniform and reasonable.

In an alternative embodiment, the cylinder gasket comprises at least two layers of construction plates, and a cylinder port ring is provided between the uppermost layer of construction plates and the lowermost layer of construction plates, the cylinder port ring surrounding a cylinder port of the engine cylinder and being disposed opposite to the compression wave.

The beneficial effects are that: the cylinder port ring is arranged at the pressure wave position between the forming plates, so that the rigidity of the pressure wave position of the forming plates is enhanced by the cylinder port ring, when the cylinder cover and the cylinder body or the cylinder sleeve of the engine cylinder press the cylinder gasket, the deformation of the pressure wave is reduced, the area of the sealing surface formed by the contact of the cylinder abutting end surface and the pressure wave is reduced, and the sealing surface obtains larger pressure.

In an alternative embodiment, a sub-plate is arranged between the cylinder port ring and the lower adjacent forming plate, and a containing groove is arranged on the sub-plate and is suitable for limiting the cylinder port ring.

The beneficial effects are that: carry out spacingly through the holding tank to jar mouth ring, prevent on the one hand that jar mouth ring from taking place the skew in the course of the work and leading to the possibility of functional failure, on the other hand, the addition of subplate also makes multilayer jar pad have higher rigidity in the ripples structure department, helps promoting sealed effect.

In an alternative embodiment, a protruding edge is provided on the auxiliary plate at a position opposite to the accommodating groove, and the protruding edge abuts against the adjacent component plate.

The beneficial effects are that: through making the subplate form protruding edge at the back of holding tank, protruding edge and jar mouth ring have promoted the thickness after the compression of the ripples department of jar pad jointly to promoted the rigidity of ripples structure, thereby further promoted sealing performance.

In a second aspect, the utility model also provides an engine, comprising the engine cylinder sealing structure.

The beneficial effects are that: the engine reduces the contact area of the cylinder propping end face and the cylinder gasket through the thickness reducing groove, so that the pressure intensity of the sealing face is improved, the sealing effect is effectively enhanced, in addition, the rigidity of the compression wave is improved through the arrangement of the cylinder opening ring, the thickness of the compression wave in a compression state is increased, the sealing performance is further improved, the sealing performance of the engine cylinder is improved greatly, the engine can adapt to the working condition of higher detonation pressure conditions, after the detonation pressure is improved by the engine, the combustion of fuel is converted into energy more efficiently, the fuel economy is improved, and the engine is more reliable and has better economy.

In a third aspect, the utility model also provides engineering equipment comprising the engine.

The beneficial effects are that: by adopting the engine, the engineering equipment can reduce oil consumption and improve power, has better operability and oil saving performance, and further effectively improves the competitiveness of the product.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a partial cross-sectional structure of a cylinder seal structure of an engine according to an embodiment of the present utility model;

Fig. 2 is a schematic diagram of a partial cross-sectional structure of a cylinder seal structure of an engine according to an embodiment of the present utility model, which is used to show the structure and positional relationship of a gasket, a cylinder port ring, and a reduced thickness groove.

Reference numerals illustrate:

100. A cylinder pad; 101. pressing waves; 102. forming a plate; 200. abutting the end face; 201. a thickness reducing groove; 2011. rounding; 300. a cylinder port ring; 400. a sub-plate; 401. a receiving groove; 402. a convex edge; 500. a cylinder cover; 600. an engine cylinder.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The main working principle of the automobile engine is that high-pressure gas generated by detonation of fuel in a cylinder pushes a piston to move, and then the piston and a crank-link mechanism matched with the piston convert linear motion into rotary motion so as to realize torque output.

In the process of improving the combustion efficiency of fuel and converting chemical energy into kinetic energy more efficiently, the explosion pressure generated when the fuel knocks in the cylinder is often increased, the explosion pressure is increased to bring additional burden to a sealing structure between a cylinder body and a cylinder cover of an engine cylinder, and if the explosion pressure is increased to cause the effect of the sealing structure to be reduced or even to be invalid, the performance of the engine can be influenced or even accidents can be caused.

According to the application, for the condition that the sealing structure of the engine is difficult to adapt to the working condition of high explosion pressure, the thickness of the end face of the cylinder body is thinned, so that the area of the abutting surface of the cylinder gasket and the engine cylinder body or the cylinder sleeve is reduced, the pressure is increased at the abutting surface, the sealing effect is greatly improved, the sealing structure can adapt to the working condition of high explosion pressure, and the explosion pressure of the engine is conveniently improved to obtain the engine with higher performance and more fuel saving.

An embodiment of the present utility model is described below with reference to fig. 1 to 2.

According to an embodiment of the present utility model, in one aspect, there is provided an engine cylinder sealing structure, referring to fig. 1 to 2, including: the cylinder gasket 100 is arranged between the cylinder body of the engine cylinder 600 and the cylinder cover 500, the cylinder gasket 100 is provided with a pressure wave 101, and the pressure wave 101 is arranged around a cylinder port of the engine cylinder 600; the cylinder body of the engine cylinder 600 is provided with a tight end face 200 towards one end of the cylinder cover 500, or the cylinder sleeve of the engine cylinder 600 is provided with a tight end face 200 towards one end of the cylinder cover 500, the tight end face 200 is suitable for being abutted with the cylinder gasket 100 to form a seal, the thickness reducing groove 201 is formed on the cylinder tight end face 200, and the edge of the thickness reducing groove 201, which is close to one side of the pressure wave 101, is positioned between the pressure wave 101 and a cylinder opening of the engine cylinder 600.

The cylinder opening of the engine cylinder 600 refers to an opening edge of an upper end of the engine cylinder 600 without a cylinder liner structure, or an opening edge of an upper end of a cylinder liner of the engine cylinder 600 with a cylinder liner structure.

Specifically, the cylinder gasket 100 may be a single-layer cylinder gasket (not shown in the drawings) or a multi-layer cylinder gasket, and the specific structure of the pressure wave 101 is not limited in this embodiment, and in the case that the cylinder gasket 100 is a single-layer cylinder gasket, the peak of the pressure wave 101 may be disposed downward, and in some embodiments, not shown, the peak of the pressure wave 101 may also be disposed downward, and the structure of the pressure wave 101 of the cylinder gasket 100 is within the protection scope of this embodiment. In addition, in the case where the gasket 100 is a multi-layered gasket, the present embodiment is not limited in the number of layers and structure of the multi-layered gasket, and is not limited in the specific form of the structure of the pressure wave 101 of the multi-layered gasket.

In one example, the gasket 100 of the multi-layer gasket includes three-layer structure plates 102, the peak of the pressure wave 101 of the uppermost layer structure plate 102 faces downward, the peak of the pressure wave 101 of the second layer structure plate 102 faces upward and abuts against the pressure wave 101 of the uppermost layer structure plate 102, and the pressure wave 101 of the third layer structure plate 102 faces downward. The present embodiment does not limit the width and size of the compression wave 101, and the width of the compression wave 101 is selected according to the type of engine and the specific condition of the cylinder port diameter of the engine cylinder 600.

Specifically, the cylinder abutting end surface 200 is an end surface of the cylinder liner toward one end of the cylinder head 500 for the engine cylinder 600 having the liner structure, and the cylinder abutting end surface 200 is an end surface of the cylinder block toward one end of the cylinder head 500 for the engine cylinder 600 without the cylinder liner.

The thickness reducing groove 201 is a groove coaxially disposed with the cylinder port of the engine cylinder 600, the thickness reducing groove 201 may be a circular groove communicating with the cylinder port of the engine cylinder 600, and in some embodiments not shown, the thickness reducing groove 201 may also be a circular groove surrounding the outside of the cylinder port of the engine cylinder 600, and the thickness reducing groove 201 is preferably a circular groove communicating with the cylinder port of the engine cylinder 600, so as to greatly reduce the contact area between the cylinder abutting end surface 200 and the cylinder gasket 100.

It should be further noted that, the thickness reducing groove 201 may be obtained by reworking an existing finished engine, so as to facilitate upgrading and reconstruction of the engine after leaving the factory, and has important significance for oil saving and emission reduction reconstruction of an existing vehicle or engineering equipment after leaving the factory.

In this embodiment, by providing the gasket 100 between the cylinder block and the cylinder head 500 of the engine cylinder 600 and providing the compression wave 101 on the gasket 100, when the cylinder block and the cylinder head 500 of the engine are compressed, the cylinder block and the cylinder head 500 of the engine are respectively abutted against both sides of the compression wave 101 of the gasket 100, thereby forming a sealing surface at the abutment position, and enhancing the sealing effect due to the strong pressure at the sealing surface. In addition, by forming the thickness reducing groove 201 on the cylinder abutting end surface 200, the thickness of the cylinder body or the cylinder sleeve end part of the engine cylinder 600 is partially reduced, the abutting area of the cylinder gasket 100 and the cylinder abutting end surface 200 of the engine cylinder body or the engine cylinder sleeve is further reduced, the pressure of the sealing surface is increased, the pressure of the pressure wave 101 structure is increased, the pressure wave 101 structure is fully deformed and is tightly abutted against the cylinder cover 500, the cylinder body or the cylinder sleeve end part, and the sealing effect is improved.

In one embodiment, the reduced thickness groove 201 has a groove depth of 0.03 millimeters to 0.05 millimeters.

Specifically, for the engine cylinder 600 that is produced in cooperation with the cylinder gasket 100, the influence of the reduced thickness groove 201 on structural fit and structural strength can be compensated by increasing the original wall thickness of the member where the cylinder abutting end face 200 is located, while the structure of the reduced thickness groove 201 can be directly machined in improvement of the automobile engine after shipment because the groove depth is limited to be between 0.03 mm and 0.05 mm and because the groove depth occupies a very limited proportion of the wall thickness, the influence of structural fit and structural strength is very limited, so that the design of thickening the cylinder member can be omitted.

In this embodiment, by limiting the groove depth of the thickness-reducing groove 201 to a range of 0.03 mm to 0.05 mm, on one hand, the contact area between the gasket 100 and the cylinder abutting end face 200 is reduced, and on the other hand, the range of compression deformation of the gasket 100 is limited, and on the other hand, the influence of the structural strength of the slotted multiple-engine cylinder 600 is avoided, and at the same time, the possibility that excessive deformation of the gasket 100 occurs when the gasket is compressed due to the groove depth is prevented, thereby affecting the sealing effect at the compression wave 101 is avoided.

In one embodiment, the distance between the edge of the reduced thickness groove 201 on the side away from the cylinder port of the corresponding engine cylinder 600 and the edge of the compression wave 101 is 1 mm to 5mm.

In this embodiment, by limiting the distance between the edge of the thickness reducing groove 201 and the edge of the pressure wave 101 to 1mm to 5mm, on one hand, the notch range of the thickness reducing groove 201 is widened as much as possible, so as to reduce the contact area between the cylinder gasket 100 and the cylinder abutting end face 200 to raise the pressure intensity, and on the other hand, the influence of tolerance, installation error and other factors is avoided, so that the sealing structure caused by too close distance between the sealing surface at the edge position of the thickness reducing groove 201 and the sealing surface at the pressure wave 101 interferes with each other, and the possibility of affecting the sealing effect is affected.

In one embodiment, the reduced thickness groove 201 is provided with a radius 2011 at the bottom corner of the groove wall on the side of the cylinder port of the engine cylinder 600.

In this embodiment, through setting up the rounding 2011 in the border department of reducing thick groove 201, on the one hand, reduce the cylinder and support tight terminal surface 200 and lie in the possibility that the border structure is destroyed that the department produces stress concentration in the thick groove 201 edge, thereby on the other hand promote the homogeneity degree of laminating between thick groove 201 border and the jar pad 100 through setting up the rounding 2011, thereby it produces inelastic deformation in the part because of the atress inequality to reduce jar pad 100 lie in the position of being in with thick groove 201 border butt, cause the possibility of structural damage, in addition, carry out the possibility that the rounding 2011 processing can effectively avoid the edge to appear the burr, promote structural planarization and avoid the burr to produce the influence to the sealing effect.

In one embodiment, the radius 2011 has a diameter of 0.4 millimeters to 0.8 millimeters.

In this embodiment, the diameter of the radius 2011 is limited to be between 0.4 mm and 0.8 mm, so that the possibility of stress concentration is further reduced, and the stress condition at the edge of the thickness reduction groove 201 is more uniform and reasonable.

In one embodiment, the cylinder head 100 includes at least two layers of constituent plates 102, and a cylinder port ring 300 is provided between the uppermost layer of constituent plates 102 and the lowermost layer of constituent plates 102, the cylinder port ring 300 surrounding a cylinder port of the engine cylinder 600 and being disposed opposite to the compression wave 101.

Specifically, the cylinder port ring 300 is applied to a sealing structure of the engine cylinder 600 with the multi-layer gasket as the gasket 100, the cylinder port ring 300 is disposed coaxially with the cylinder port of the engine cylinder 600 and around the outer periphery of the cylinder port of the engine cylinder 600, and the cylinder port ring 300 is in a sheet-like circular ring structure and is disposed in facing relation to the compression wave 101. The present embodiment does not limit the specific positions of the cylinder port ring 300 in the multi-layer gasket 100, and the structure in which the cylinder port ring 300 is disposed between any two of the constituent plates 102 is within the scope of the present embodiment. In one example, the gasket 100 is a three-layer gasket, that is, the gasket 100 is formed by stacking three-layer constituent plates 102, the peak of the pressure wave 101 of the uppermost constituent plate 102 is disposed downward, and the peak of the pressure wave 101 of the second constituent plate 102 is disposed upward and abuts against the peak of the pressure wave 101 of the uppermost constituent plate 102. The pressure wave 101 of the lowermost constituent plate 102 is disposed crest down, and the cylinder port ring 300 is disposed between the second constituent plate 102 and the lowermost constituent plate 102.

The specific form of the structure of the pressure wave 101 of the plate 102 constituted by each layer of the multilayer gasket is preferably: the pressure wave 101 of the two-layer constitution plate 102 adjacent to the cylinder port ring 300 is made to have its wave crests facing toward the side away from the cylinder port ring 300, thereby making the multi-layer gasket easy to process and assemble.

In this embodiment, by providing the cylinder port ring 300 at the position of the compression wave 101 between the constituent plates 102, the cylinder port ring 300 is made to enhance the rigidity of the compression wave 101 of the constituent plates 102, so that when the cylinder head 500 is pressed against the cylinder block or the liner of the engine cylinder 600 by the cylinder liner 100, the deformation amount of the compression wave 101 is reduced by the sealing surface area formed by the cylinder abutting end surface 200 in contact with the compression wave 101, and a larger pressure is obtained at the sealing surface, and as the sealing surface area is reduced and the pressure is raised, a larger pressure is obtained at the sealing surface, the abutment of both sides of the sealing surface is tighter, and the sealing effect is greatly improved.

In one embodiment, a sub-plate 400 is provided between the cylinder port ring 300 and the lower adjacent constituent plate 102, and a receiving groove 401 is provided on the sub-plate 400, and the receiving groove 401 is adapted to limit the cylinder port ring 300.

Specifically, the accommodating groove 401 may be formed by recessing the sub-plate 400, and in some embodiments not shown, may be formed by bending, or may be formed by cutting, and the specific machining manner of the accommodating groove 401 is within the scope of this embodiment.

In this embodiment, the accommodating groove 401 is used to limit the cylinder port ring 300, so as to prevent the possibility of functional failure caused by the offset of the cylinder port ring 300 during operation, and the addition of the auxiliary plate 400 also makes the multi-layer cylinder gasket 100 have higher rigidity at the pressure wave 101 structure, which is helpful for improving the sealing effect.

In one embodiment, the sub-plate 400 is provided with a protruding edge 402 at a position opposite to the receiving groove 401, and the protruding edge 402 abuts against the adjacent constituent plate 102.

Specifically, the accommodating groove 401 on the sub-plate 400 is formed by the sub-plate 400 through the embossing, the accommodating groove 401 is formed on the embossed side of the sub-plate 400, and the convex edge 402 is formed on the convex side.

In this embodiment, the flange 402 is formed on the back surface of the accommodating groove 401 by the auxiliary plate 400, and the flange 402 and the cylinder port ring 300 jointly lift the thickness of the compressed pressure wave 101 of the cylinder gasket 100.

According to an embodiment of the present utility model, in another aspect, there is also provided an engine including the engine cylinder sealing structure in any of the above embodiments.

The engine may be a gasoline engine, a diesel engine, or another engine belonging to an internal combustion engine.

In this embodiment, the engine reduces the contact area between the cylinder abutting end surface 200 and the cylinder gasket 100 by setting the thickness reducing groove 201, so as to improve the pressure intensity at the sealing surface, effectively enhancing the sealing effect, and in addition, the setting of the cylinder opening ring 300 improves the rigidity of the compression wave 101 and increases the thickness of the compression wave 101 in the compression state, so as to further improve the sealing performance, and greatly improve the sealing performance of the engine cylinder 600, thereby enabling the engine to adapt to the working condition of higher detonation pressure conditions.

According to a third aspect of the embodiments of the present utility model, there is also provided an engineering apparatus comprising the engine described above.

The engineering equipment can be working vehicles such as heavy trucks, trailers, excavators, anchor diggers, bulldozers, road rollers, concrete pump trucks and the like, or mechanical working equipment such as tower cranes, construction lifts, material lifts and the like.

In the embodiment, the engine is adopted by engineering equipment, so that the oil consumption can be reduced, the power can be improved, better operability and oil saving performance are achieved, and the competitiveness of products is effectively improved.

Although embodiments of the present utility model have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations fall within the scope of the utility model as defined by the appended claims.

Claims (10)

1. An engine cylinder sealing structure, comprising:

A cylinder gasket (100) arranged between a cylinder body and a cylinder cover (500) of an engine cylinder (600), wherein a compression wave (101) is arranged on the cylinder gasket (100), and the compression wave (101) is arranged around a cylinder opening of the engine cylinder (600);

The thickness reduction groove (201), the cylinder body of engine cylinder (600) towards the one end of cylinder cap (500) is equipped with supports tight terminal surface (200), perhaps the cylinder liner of engine cylinder (600) towards the one end of cylinder cap (500) is equipped with supports tight terminal surface (200), support tight terminal surface (200) be suitable for with cylinder pad (100) butt formation seal, thickness reduction groove (201) set up in support tight terminal surface (200), thickness reduction groove (201) be close to the border of pressure wave (101) one side is located between pressure wave (101) and the jar mouth of engine cylinder (600).

2. The engine cylinder seal arrangement of claim 1, wherein the reduced thickness groove (201) has a groove depth in the range of 0.03 mm to 0.05 mm.

3. The engine cylinder sealing structure according to claim 2, wherein a distance between an edge of the reduced thickness groove (201) on a side away from a cylinder port corresponding to the engine cylinder (600) and an edge of the pressure wave (101) is in a range of 1 mm to 5 mm.

4. An engine cylinder sealing arrangement according to claim 3, characterized in that the reduced thickness groove (201) is provided with a rounding (2011) at the groove wall bottom corner of the side of the cylinder opening remote from the engine cylinder (600).

5. The engine cylinder sealing structure according to claim 4, characterized in that the diameter of the radius (2011) ranges from 0.4 mm to 0.8 mm.

6. The engine cylinder sealing structure according to any one of claims 1 to 5, characterized in that the gasket (100) includes at least two layers of constituent plates (102) arranged in a stack, a cylinder port ring (300) is provided between the uppermost layer of the constituent plates (102) and the lowermost layer of the constituent plates (102), the cylinder port ring (300) surrounding a cylinder port of the engine cylinder (600) and being arranged opposite to the compression wave (101).

7. The engine cylinder sealing structure according to claim 6, characterized in that a sub-plate (400) is provided between the cylinder port ring (300) and the constituent plate (102) adjacent to the lower side, a receiving groove (401) is provided on the sub-plate (400), and the receiving groove (401) is adapted to limit the cylinder port ring (300).

8. The engine cylinder sealing structure according to claim 7, characterized in that a protruding edge (402) is provided on the sub-plate (400) at a position opposite to the accommodation groove (401), the protruding edge (402) abutting against the adjacent constituent plate (102).

9. An engine comprising the engine cylinder sealing structure according to any one of claims 1 to 8.

10. An engineering apparatus, characterized in that: comprising the engine of claim 9.