CN114810408A

CN114810408A - Engine and vehicle

Info

Publication number: CN114810408A
Application number: CN202210279151.XA
Authority: CN
Inventors: 周涛; 云峰; 朱海燕; 王有治; 宋娇
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2022-03-21
Filing date: 2022-03-21
Publication date: 2022-07-29

Abstract

The invention belongs to the technical field of vehicles, and discloses an engine and a vehicle, wherein the engine comprises an engine body, a cylinder sleeve and a cylinder cover, a plurality of first cylinder holes are formed in the engine body, and cooling water is not arranged on the engine body; the cylinder liners are arranged in the cylinder bores in a one-to-one correspondence manner, and a first portion of the cylinder liner extends out of the cylinder bores; the cylinder cover is provided with a plurality of second cylinder holes, the second cylinder holes and the first cylinder holes are arranged in a one-to-one correspondence mode and are communicated, the first portion of the cylinder sleeve extends into the second cylinder holes, and a cylinder sleeve cooling water jacket is arranged inside the cylinder cover and used for cooling the first portion. According to the engine provided by the invention, the cooling water jacket on the engine body is omitted, the cylinder cover is integrated with the water jacket part of the original engine body, the cylinder sleeve extends out of the engine body to the cylinder cover, the cylinder sleeve is cooled through the cylinder sleeve cooling water jacket on the cylinder cover, leakage points are reduced, and bolt force is not applied to the cylinder sleeve after the cylinder sleeve extends into the cylinder cover, so that the deformation of the cylinder hole is reduced, and a good environment is provided for the movement of the piston.

Description

Engine and vehicle

Technical Field

The invention belongs to the technical field of vehicles, and particularly relates to an engine and a vehicle.

Background

This section provides background information related to the present disclosure only and is not necessarily prior art.

Along with the promotion of engine intensification degree, detonation pressure and moment of torsion are constantly improving, lead to organism cylinder cap system reliability constantly to reduce, and the trouble probability constantly improves. And along with the promotion of detonation pressure, also higher and higher to the sealed of cylinder gasket and the cooperation requirement between cylinder liner and the piston ring group, for the sealed effect of guaranteeing the cylinder gasket, cylinder head bolt specification and grade need constantly improve, and prior art because the cylinder liner is installed completely on with the organism, the improvement of bolt axial force can lead to the organism atress to increase, and the jar hole warp seriously, and the cooperation between piston ring group and cylinder liner worsens, and the jar hole also worsens for the condition that the operation of piston provided, causes the machine oil to consume the height, the gas leakage is big scheduling problem. Although the bolt axial force is increased, the sealing of the cylinder gasket is deteriorated due to the larger burst pressure rise, and the balance between the cylinder gasket and the cylinder gasket is difficult to realize, thereby limiting the increase of the strengthening degree of the engine.

Disclosure of Invention

The invention aims to at least solve the problem that the self structure of the engine in the prior art limits the lifting and strengthening degree of the engine, and the aim is realized by the following technical scheme:

a first aspect of the invention provides an engine comprising:

the engine comprises an engine body, a first cylinder hole and a second cylinder hole, wherein a plurality of first cylinder holes are formed in the engine body;

the cylinder cover is provided with a plurality of second cylinder holes, the second cylinder holes and the first cylinder holes are arranged in a one-to-one correspondence mode, and the second cylinder holes are communicated with the first cylinder holes;

the cylinder liner is arranged in the first cylinder hole in a one-to-one correspondence mode, a first portion of the cylinder liner extends out of the first cylinder hole and extends into the second cylinder hole, a cylinder liner cooling water jacket is arranged inside the cylinder cover, and the cylinder liner cooling water jacket is used for cooling the first portion of the cylinder liner.

The engine provided by the invention cancels the cooling water jacket on the engine body, the cylinder cover is integrated with the water jacket part of the original engine body, the cylinder sleeve extends out of the engine body to the cylinder cover, the cylinder sleeve is cooled by the cylinder sleeve cooling water jacket on the cylinder cover, leakage points are reduced, and after the cylinder sleeve extends into the cylinder cover, the bolt force does not act on the cylinder sleeve any more, the deformation of the cylinder hole is reduced, and a good environment is provided for the movement of the piston.

In addition, the engine according to the present invention may have the following additional technical features:

in some embodiments of the present invention, the cylinder liner cooling water jacket includes a water inlet water jacket and a plurality of branch cooling water jackets, the branch cooling water jackets are disposed in one-to-one correspondence with the cylinder liner, the branch cooling water jackets are disposed around the cylinder liner, and the water inlet water jackets are respectively communicated with the plurality of branch cooling water jackets.

In some embodiments of the invention, a cylinder head cooling water jacket is further arranged in the cylinder head, the cylinder head cooling water jacket is communicated with the cylinder sleeve cooling water jacket, and the cylinder head cooling water jacket is arranged at the downstream of the cylinder sleeve cooling water jacket in the cooling water flowing direction.

In some embodiments of the present invention, the cylinder liner cooling water jacket further includes a plurality of water distribution cavities, the water distribution cavities are arranged in one-to-one correspondence with the branch cooling water jackets, and the water inlet water jacket is communicated with the branch cooling water jackets through the water distribution cavities.

In some embodiments of the present invention, the cylinder liner includes a cylinder liner body, a positioning portion and at least one first sealing groove, the positioning portion is disposed on the top of the outer side wall of the cylinder liner body, and the first sealing groove is annularly disposed on the outer side wall of the positioning portion.

In some embodiments of the present invention, the cylinder liner further includes a support shoulder, the support shoulder is disposed on an outer side wall of the cylinder liner body, the support shoulder abuts against the engine body, and a portion of the cylinder liner body located from the support shoulder to a bottom end of the cylinder liner body is inserted into the first cylinder bore.

In some embodiments of the present invention, the liner cooling jacket is in contact with a portion of the liner between the support shoulder and the locating portion.

In some embodiments of the present invention, at least one second seal groove is further disposed on the cylinder sleeve, and the second seal groove is annularly disposed on an outer side wall of the support shoulder.

In some embodiments of the invention, the cylinder head cooling jacket is disposed proximate to a top end of the cylinder head and the liner cooling jacket is disposed proximate to a bottom end of the cylinder head.

A second aspect of the invention proposes a vehicle having the engine proposed in the first aspect of the invention.

The vehicle according to the second aspect of the present invention has the same advantageous effects as the engine according to the first aspect of the present invention, and therefore, the description thereof is omitted.

Drawings

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:

FIG. 1 schematically illustrates a partial cross-sectional structural view of an engine according to an embodiment of the present invention;

FIG. 2 schematically illustrates a partial cross-sectional structural view of a cylinder head according to an embodiment of the present invention;

FIG. 3 schematically illustrates a structural schematic of a cylinder liner according to an embodiment of the present invention;

FIG. 4 schematically illustrates a structural schematic diagram with a first perspective view of a cylinder head cooling jacket and a liner cooling jacket according to an embodiment of the present invention;

FIG. 5 schematically illustrates a structural schematic diagram with a second perspective view of a cylinder head cooling jacket and a liner cooling jacket according to an embodiment of the present invention;

FIG. 6 schematically illustrates a view of the structure in the direction B in FIG. 4;

fig. 7 schematically shows a view of the structure in the direction a-a in fig. 4.

The reference symbols in the drawings denote the following:

10: a machine body, 11: cylinder cap, 12: cylinder liner, 121: positioning section, 122: first seal groove, 123: support shoulder, 124: second seal groove, 13: first cylinder bore, 14: second cylinder bore, 15: cylinder liner cooling water jacket, 16: cylinder head cooling water jacket, 17: water inlet jacket, 18: branch cooling water jacket, 19: a water distribution cavity.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a," "an," and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.

Although the terms, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, an element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "inner", "side", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 to 7, a first aspect of the present invention provides an engine, including a machine body 10, a cylinder liner 12, and a cylinder head 11, wherein a plurality of first cylinder bores 13 are provided on the machine body 10, and a cooling water jacket is not provided on the machine body 10; the liners 12 are disposed in the cylinder bores in a one-to-one correspondence, and a first portion of the liners 12 extends out of the cylinder bores; the cylinder head 11 is provided with a plurality of second cylinder holes 14, the second cylinder holes 14 are arranged in one-to-one correspondence with the first cylinder holes 13, the bottoms of the second cylinder holes 14 are communicated with the tops of the first cylinder holes 13, a first portion of the cylinder liner 12 extends into the second cylinder holes 14, a liner cooling water jacket 15 is arranged inside the cylinder head 11, and the liner cooling water jacket 15 is used for cooling the first portion of the cylinder liner 12.

The length of the cylinder liner 12 extending into the second cylinder bore 14 may account for one-half of the length of the cylinder liner 12, so that the upper half of the cylinder liner 12, which is at a higher temperature when the engine is running, can be cooled by the liner cooling water jacket 15, and a good environment is provided for the engine to run. The second cylinder bore 14 is structurally matched to the first cylinder bore 13, and the two together form a cylinder bore. The bore liner 12 may be secured by interference or by a support shoulder 123 or the like. The liner cooling jacket 15 is integrally designed with the cooling jacket of the original cylinder cover 11, and is communicated with the cooling jacket, and the liner cooling jacket 15 can be designed around the second cylinder hole 14 by referring to the existing liner cooling jacket 15 on the engine block 10.

According to the engine provided by the invention, the cooling water jacket on the engine body 10 is eliminated, the cylinder cover 11 is integrated with the water jacket part of the original engine body 10, the cylinder sleeve 12 extends out of the engine body 10 to the cylinder cover 11, the cylinder sleeve 12 is cooled through the cylinder sleeve cooling water jacket 15 on the cylinder cover 11, leakage points are reduced, and after the cylinder sleeve 12 extends into the cylinder cover 11, bolt force is not applied to the cylinder sleeve 12 any more, so that the deformation of a cylinder hole is reduced, and a good environment is provided for the movement of a piston.

In some embodiments of the present invention, the liner cooling water jacket 15 includes a water inlet water jacket 17 and a plurality of branch cooling water jackets 18, the branch cooling water jackets 18 are disposed in one-to-one correspondence with the cylinder liners 12, the branch cooling water jackets 18 are disposed around the cylinder liners 12, and the water inlet water jackets 17 are respectively communicated with the plurality of branch cooling water jackets 18. The water inlet jacket 17 is communicated with an engine cooling water system, cooling water is introduced from the outside, an inlet of the water inlet jacket 17 can be arranged in the middle of the cylinder cover 11 to facilitate the uniform distribution of the inlet water to flow to each branch cooling jacket 18, and the branch cooling jackets 18 are designed around the cylinder sleeve 12, so that the cylinder sleeve 12 is cooled by the cooling water in the circumferential direction, and cooling dead angles are eliminated.

In some embodiments of the present invention, a cylinder head cooling water jacket 16 is further provided inside the cylinder head 11, the cylinder head cooling water jacket 16 is communicated with the liner cooling water jacket 15, and the cylinder head cooling water jacket 16 is provided downstream of the liner cooling water jacket 15 in the cooling water flow direction. Since the cylinder head 11 itself also takes a part of heat due to the operation of the engine and needs to dissipate heat, a cylinder head cooling water jacket 16 is further provided inside the cylinder head 11, and the structure of the cylinder head cooling water jacket 16 can refer to the existing cylinder head cooling water jacket 16, which is not limited herein. The head cooling jacket 16 is disposed downstream of the liner cooling jacket 15 in the flow direction of the cooling water so that the cooling water cools the high-temperature liner 12 and then cools the slightly low-temperature head 11. One side of the branch cooling water jacket 18 is communicated with the water inlet water jacket 17, and the other side far away from the side is communicated with the cylinder cover cooling water jacket 16, so that the cylinder sleeve 12 can be fully cooled by cooling water, and the phenomenon that the cooling effect is reduced due to too short flowing time in the cylinder sleeve cooling water jacket 15 is avoided.

In some embodiments of the present invention, the liner cooling water jacket 15 further includes a plurality of water distribution cavities 19, the water distribution cavities 19 are disposed in one-to-one correspondence with the branch cooling water jackets 18, and the water inlet water jacket 17 is communicated with the branch cooling water jackets 18 through the water distribution cavities 19. The water distribution cavity 19 is arranged between the branch cooling water jackets 18 and the water inlet water jackets 17, so that cooling water enters from the water inlet water jackets 17 and then passes through the water distribution cavity 19, the communication position of the water distribution cavity 19 and the branch cooling water jackets 18 is higher than the bottom of the water distribution cavity 19, the cooling water can be stored in the water distribution cavity 19 firstly, and the cooling water flows from the water distribution cavity 19 to the branch cooling water jackets 18 when the liquid level of the water distribution cavity 19 reaches the communication position of the water distribution cavity 19 and the branch cooling water jackets 18 after a certain amount of cooling water is stored in all the water distribution cavities 19.

In some embodiments of the present invention, the cylinder liner 12 includes a cylinder liner 12 body, a positioning portion 121 and at least one first sealing groove 122, the positioning portion 121 is disposed on the top of the outer side wall of the cylinder liner 12 body, the first sealing groove 122 is annularly disposed on the outer side wall of the positioning portion 121, the positioning portion 121 may be an annular boss protruding from the cylinder liner 12 body, when the cylinder liner 12 is installed, the positioning portion 121 is adapted to the inner wall of the second cylinder hole 14, so that the cylinder liner 12 is correctly assembled, and the cylinder liner is prevented from being tilted, and the outer side wall of the positioning portion 121 is abutted against the wall of the second cylinder hole 14, so that the cylinder liner 12 is fixed. The cross section of the first sealing groove 122 may be trapezoidal or rectangular, a plurality of first sealing grooves 122 may be arranged on the outer side wall of the positioning portion 121 at intervals, and the first sealing grooves 122 may block the coolant from flowing out from the water jacket, so as to improve the sealing effect of the engine.

In some embodiments of the present invention, the cylinder liner 12 further includes a support shoulder 123, the support shoulder 123 is disposed on an outer side wall of the body of the cylinder liner 12, the support shoulder 123 abuts against the engine block 10, and a portion of the body of the cylinder liner 12 from the support shoulder 123 to the bottom end of the body of the cylinder liner 12 is inserted inside the first cylinder bore 13. During the assembly, the bottom surface that will support shoulder 123 and the top surface butt of organism 10 for cylinder liner 12 joint realizes that the installation of cylinder liner 12 is fixed between cylinder cap 11 and organism 10.

In some embodiments of the present invention, the liner cooling jacket 15 is in contact with the portion of the liner 12 between the support shoulder 123 and the locating portion 121. The two ends of the part are provided with sealing grooves, so that the sealing effect is enhanced, and the coolant can be prevented from flowing out of the cylinder sleeve cooling water jacket 15. Since this portion is subjected to a large amount of heat during engine operation, the wall thickness of this portion can be designed to be larger than the wall thickness of the other portions of the cylinder liner 12.

In some embodiments of the present invention, at least one second sealing groove 124 is further disposed on the cylinder casing 12, and the second sealing groove 124 is disposed around an outer side wall of the support shoulder 123. The cross section of the second sealing groove 124 may be trapezoidal or rectangular, and a plurality of second sealing grooves 124 may be disposed at intervals on the outer sidewall of the support shoulder 123, and the second sealing grooves 124 may block the coolant from flowing out from the water jacket, thereby improving the sealing effect of the engine.

In some embodiments of the present invention, the head cooling jacket 16 is disposed near the top end of the cylinder head 11 and the liner cooling jacket 15 is disposed near the bottom end of the cylinder head 11. So that the cooling water can fully cool the cylinder liner 12 and then enter the cylinder cover cooling water jacket 16 to enhance the cooling effect of the cylinder liner 12.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An engine, comprising:

2. The engine of claim 1, characterized in that the liner cooling water jackets include a water inlet water jacket and a plurality of branch cooling water jackets, the branch cooling water jackets are arranged in one-to-one correspondence with the cylinder liners, the branch cooling water jackets are arranged around the cylinder liners, and the water inlet water jackets are respectively communicated with the plurality of branch cooling water jackets.

3. The engine of claim 2, characterized in that the liner cooling jacket further comprises a plurality of water distribution chambers, the water distribution chambers are arranged in one-to-one correspondence with the branch cooling jackets, and the water inlet jacket is communicated with the branch cooling jackets through the water distribution chambers.

4. The engine according to claim 1, characterized in that a cylinder head cooling water jacket is further provided inside the cylinder head, the cylinder head cooling water jacket communicates with the liner cooling water jacket, and the cylinder head cooling water jacket is provided downstream of the liner cooling water jacket in the cooling water flow direction.

5. The engine of claim 1, characterized in that the cylinder liner comprises a cylinder liner body, a positioning portion and at least one first seal groove, wherein the positioning portion is arranged at the top of the outer side wall of the cylinder liner body, and the first seal groove is annularly arranged on the outer side wall of the positioning portion.

6. The engine of claim 5, wherein the cylinder liner further comprises a support shoulder disposed on an outer sidewall of the cylinder liner body, the support shoulder abuts against the engine block, and a portion of the cylinder liner body located from the support shoulder to a bottom end of the cylinder liner body is inserted inside the first cylinder bore.

7. The engine of claim 6, characterized in that the liner cooling jacket is in contact with a portion of the liner between the support shoulder and the locating portion.

8. The engine of claim 6, wherein the cylinder liner is further provided with at least one second seal groove disposed around an outer sidewall of the support shoulder.

9. The engine of any one of claims 1 to 8, characterized in that the head cooling jacket is disposed proximate a top end of the cylinder head and the liner cooling jacket is disposed proximate a bottom end of the cylinder head.

10. A vehicle characterized by having an engine according to any one of claims 1 to 9.