Novel structure for forced cooling between two cylinders of dry cylinder sleeve of engine

Abstract

The invention discloses a novel structure for forced cooling between two cylinders of a dry cylinder sleeve of an engine, which comprises a cylinder body, a plurality of cylinder holes, a cooling water jacket and a water inlet pipe, the cooling water jacket and the water inlet pipe are used for cooling the cylinder body, a plurality of cooling water holes are arranged between two adjacent cylinder holes, and the cooling water jacket and the water inlet pipe are communicated with each other. One end of each cooling water hole extends to one side of the air cylinder body and is communicated with a water inlet pipe, and the other end of each cooling water hole transversely penetrates through the space between every two adjacent cylinder holes and is communicated with the cooling water jacket. The device has the advantages of simple structure, good cylinder hole cooling effect and the like.

Description

Technical Field

[0001] This invention relates to the field of engine technology, and in particular to a novel structure for forced cooling between two cylinders in a dry cylinder liner engine. Background Technology

[0002] An engine needs to be kept within a certain temperature range to operate normally. During operation, it generates a lot of heat, which needs to be dissipated promptly. If heat dissipation is ineffective, it can lead to overheating and malfunctions such as cylinder scoring. A water-cooling system uses water or coolant as the cooling medium, removing the heat from combustion in the engine cylinders through heat exchange, thus ensuring the engine operates at its normal temperature.

[0003] Water cooling systems use water as a cooling medium, which flows around the cylinders where the engine's heat source is generated, thus carrying away excess heat. Its heat dissipation efficiency is affected by the structure around the cylinders.

[0004] For existing piston engines, the mainstream cylinder cooling technology using dry cylinder liners currently falls into two categories: the first type... Figure 1 As shown, the wall thickness between the two cylinders is sufficient, allowing the space between them to be formed during the casting of the cylinder block blank. Figure 2 The water chamber is shown. In the second type, the wall thickness between the two cylinders is insufficient to achieve water cooling through casting. Therefore, water can only be supplied by machining and drilling.

[0005] However, with the current trend towards smaller and lighter engines, the first solution mentioned above is becoming increasingly difficult to implement. According to current mainstream casting processes in China, the minimum thickness is generally 5+4+5, meaning a 5mm wall thickness and a 4mm water cavity. Therefore, when the minimum distance between the two cylinders is less than 14mm, it is difficult to use a cast water cavity, mainly because casting is extremely difficult, has a high scrap rate, and is very costly. In this case, the second method is usually used, which involves machining to allow for the selection of drilled holes to connect the water channels. Both methods share a common problem: the cross-sectional area of ​​the water channel between the two cylinders is small, resulting in insufficient water flow and limited cooling capacity.

[0006] The above background information is provided only to aid in understanding the concept and technical solution of this invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention

[0007] The main objective of this invention is to propose a novel structure for forced cooling between two cylinders of an engine dry cylinder liner that is simple in structure and has a good cooling effect on the cylinder bore.

[0008] Therefore, this invention proposes a novel structure for forced cooling between two cylinders in a dry cylinder liner system for engines.

[0009] Preferably, the present invention may also have the following technical features:

[0010] A novel structure for forced cooling between two cylinders in a dry cylinder liner engine includes a cylinder block with multiple cylinder bores, a cooling water jacket for cooling the cylinder block, and a water inlet pipe. Multiple cooling water holes are provided between two adjacent cylinder bores. One end of each cooling water hole extends to one side of the cylinder block and connects to the water inlet pipe, while the other end passes through the space between two adjacent cylinder bores and connects to the cooling water jacket.

[0011] Furthermore, the cooling water holes are arranged horizontally.

[0012] Furthermore, it is equipped with multiple cooling water holes at different heights and arranged in parallel to each other.

[0013] Furthermore, the water inlet pipe is fixed to the side of the cylinder block, and coolant is supplied to the water inlet pipe by a water pump.

[0014] Furthermore, the cooling water hole is a stepped hole, wherein the larger end of the stepped hole is connected to the water inlet pipe, and the smaller end is located between the two cylinders.

[0015] Furthermore, a copper tube is embedded in the larger end of the stepped hole.

[0016] Furthermore, the inner diameter of the copper tube is larger than the diameter of the small end of the stepped hole.

[0017] Furthermore, the cylinder block has several cooling water jacket inlets, and the cooling water jacket inlets and the cooling water hole inlets are on the same side.

[0018] Furthermore, the water inlet pipe includes a pipe body and a branch pipe extending from the pipe body. One side of the pipe body is the water inlet end, and the side that is in contact with the cylinder block is open. The branch pipe is used to provide coolant to the cooling water holes outside the coverage area of ​​the water inlet pipe.

[0019] The beneficial effects of this invention compared to the prior art include:

[0020] Arranging multiple cooling water holes between two adjacent cylinder bores, along with the water inlet pipe, to force cooling of the cylinder bores can effectively solve the problem of insufficient water flow in this area and improve the cooling effect on the cylinder bores.

[0021] Machining the cylinder block by drilling has advantages over casting, such as simpler processing and lower scrap rate.

[0022] The cooling water holes cross between two adjacent cylinder bores, forming a wide cooling range. By setting multiple cooling water holes at different heights and parallel to each other, the cooling of the cylinder bores is further enhanced, resulting in a significant improvement in the temperature at the cylinder bores. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a water chamber set between two cylinders in the existing technology.

[0024] Figure 2 This is a schematic diagram of the structure of a cross-drilled cooling cylinder bore in the prior art.

[0025] Figure 3 This is the front view of the present invention.

[0026] Figure 4 This is a cross-sectional view of the present invention.

[0027] Figure 5 This is a schematic diagram of the copper tube assembly of the present invention.

[0028] Figure 6 This is a schematic diagram of the copper tube structure of the present invention.

[0029] Figure 7 This is a schematic diagram of the water inlet pipe structure of the present invention.

[0030] Figure 8 This is a schematic diagram of the water inlet pipe assembly of the present invention.

[0031] Figure 9 yes Figure 8 A sectional view. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to specific embodiments and the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope or application of the present invention.

[0033] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein the same reference numerals denote the same parts unless otherwise specifically stated.

[0034] like Figure 3-9The diagram illustrates a novel structure for forced cooling between two cylinders in a dry-type cylinder liner engine. It includes a cylinder block 1 with multiple cylinder bores, a cooling water jacket 5, and a water inlet pipe 2. Multiple cooling water holes 3 are positioned between adjacent cylinder bores. One end of each cooling water hole 3 extends to one side of the cylinder block 1 and connects to the water inlet pipe 2, while the other end traverses the space between adjacent cylinder bores and connects to the cooling water jacket 5. In this embodiment, the arrangement of multiple cooling water holes 3 between adjacent cylinder bores, in conjunction with the water inlet pipe 2, provides forced cooling to the cylinder bores, effectively addressing the problem of insufficient water flow in this area and improving the cooling effect on the cylinder bores. Preferably, the cooling water holes 3 are arranged horizontally. The cooling water holes 3 are drilled into the cylinder block 1 through machining, offering advantages over casting, such as simpler processing and lower scrap rate. The cooling water holes 3 traverse the space between adjacent cylinder bores, creating a wide cooling range. Furthermore, the arrangement of multiple parallel cooling water holes 3 at different heights further enhances the cooling of the cylinder bores, significantly improving the local temperature at the cylinder bores. The water inlet pipe 2 is fixed to the side of the cylinder block 1. Coolant is supplied to the water inlet pipe 2 by a water pump. The water pressure of the coolant increases under the action of the water pump, which increases the water flow rate of the cooling water hole 3 and increases the heat exchange efficiency. Moreover, the cooling water hole 3 is connected to the water inlet pipe 2, and the high water pressure is more conducive to the flow of water through the cooling water hole 3.

[0035] In one preferred embodiment, the cooling water hole 3 is a stepped hole, wherein the larger end 32 of the stepped hole is connected to the water inlet pipe 2, and the smaller end 31 is located between the two cylinders to accommodate the small-sized layout between the two cylinders. The stepped hole structure allows for the accumulation of more coolant, and the larger end of the stepped hole, while meeting design requirements, is close to the space between adjacent cylinder holes, which is more beneficial for reducing the temperature of the cylinder holes.

[0036] Furthermore, in some cylinder block cooling water jacket arrangements, cooling water jackets 5 are provided on both sides between adjacent cylinders, requiring the cooling water holes 3 to traverse part of the cooling water jackets 5, which makes it impossible to guarantee sufficient flow and water pressure for the cooling water holes 3. Therefore, a copper tube 4 is embedded in the larger end 32 of the stepped hole. The copper tube 4 provides sufficient and guided coolant to the cooling water holes 3, preventing the coolant introduced into the cooling water holes 3 through the inlet pipe 2 from mixing with the cooling water jackets 5 before passing between the two cylinders. In this way, after the copper tube 4 is installed, the coolant flows from the inlet pipe 2 into the copper tube 4, then flows through the smaller end 31 of the cooling water holes 3 and merges into the cooling water jacket 5 on the other side of the cylinder block 1.

[0037] The cylinder block 1 has several cooling water jacket inlets 11, and the cooling water jacket inlets 11 and the inlets of the cooling water holes 3 are on the same side. The water inlet pipe 2 includes a pipe body 23 and a branch pipe 21 extending from the pipe body 23. One side (right side) of the pipe body 23 is the water inlet end, and the side (rear side) that is in contact with the cylinder block 1 is open. When the coolant enters from the water inlet end, it enters the cooling water jacket inlet 11 on the cylinder block 1 along the guide of the water inlet pipe 2. When arranging the cooling water holes 3, some of the cooling water holes 3 are arranged outside the coverage area of ​​the water inlet pipe body 23. Therefore, by extending a branch pipe 21 corresponding to the position of the cooling water holes 3 on the upper side of the water inlet pipe 2, the branch pipe 21 is used to provide coolant to the cooling water holes 3 outside the coverage area of ​​the water inlet pipe body 23. The end of the branch pipe 21 is also provided with a connecting hole 22, and the cylinder block 1 is also provided with a screw hole 12 corresponding to the position of the connecting hole 22 to enhance the installation sealing of the branch pipe 21.

[0038] Those skilled in the art will recognize that numerous variations are possible with respect to the above description, and the embodiments and figures are merely for describing one or more specific implementations.

[0039] Although exemplary embodiments of the invention have been described and illustrated, those skilled in the art will understand that various changes and substitutions can be made thereto without departing from the spirit of the invention. Furthermore, many modifications can be made to adapt specific situations to the doctrine of the invention without departing from the central concepts of the invention described herein. Therefore, the invention is not limited to the specific embodiments disclosed herein, but may include all embodiments and equivalents that fall within the scope of the invention.

Claims

1. A novel structure for forced cooling between two cylinders in a dry-type cylinder liner engine, characterized in that: The cylinder block includes a cylinder block with multiple cylinder bores, a cooling water jacket and a water inlet pipe for cooling the cylinder block. Multiple cooling water holes are provided between two adjacent cylinder bores. One end of each cooling water hole extends to one side of the cylinder block and connects to the water inlet pipe, while the other end passes through the space between two adjacent cylinder bores and connects to the cooling water jacket.

2. The novel structure for forced cooling between two cylinders in a dry-type cylinder liner engine as described in claim 1, characterized in that: The cooling water holes are arranged horizontally.

3. The novel structure for forced cooling between two cylinders in a dry-type cylinder liner engine as described in claim 1, characterized in that: It has multiple cooling water holes at different heights and arranged parallel to each other.

4. The novel structure for forced cooling between two cylinders in a dry-type cylinder liner engine as described in claim 1, characterized in that: The water inlet pipe is fixed to the side of the cylinder block, and coolant is supplied to the water inlet pipe by a water pump.

5. The novel structure for forced cooling between two cylinders in a dry-type cylinder liner engine as described in claim 1, characterized in that: The cooling water hole is a stepped hole, wherein the larger end of the stepped hole is connected to the water inlet pipe, and the smaller end is located between the two cylinders.

6. The novel structure for forced cooling between two cylinders in a dry-type cylinder liner engine as described in claim 5, characterized in that: A copper tube is embedded in the larger end of the stepped hole.

7. The novel structure for forced cooling between two cylinders in a dry-type cylinder liner engine as described in claim 6, characterized in that: The inner diameter of the copper tube is larger than the diameter of the small end of the stepped hole.

8. The novel structure for forced cooling between two cylinders in a dry-type cylinder liner engine as described in claim 1, characterized in that: The cylinder block has several cooling water jacket inlets, and the cooling water jacket inlets and the cooling water hole inlets are on the same side.

9. The novel structure for forced cooling between two cylinders in a dry-type cylinder liner engine as described in claim 8, characterized in that: The water inlet pipe includes a pipe body and a branch pipe extending from the pipe body. One side of the pipe body is the water inlet end, and the side that is in contact with the cylinder block is open. The branch pipe provides coolant to the cooling water holes outside the coverage area of ​​the water inlet pipe.

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