A flow-balanced v-type engine cooling jacket and engine

Abstract

The application discloses a V-shaped engine cooling water jacket with equalized flow, which comprises a water inlet main pipe, a left water return pipe, a right water return pipe, a cylinder head water jacket, a left side cylinder water jacket and a right side cylinder water jacket, wherein the cylinder head water jacket comprises a left side cylinder head water jacket and a right side cylinder head water jacket; the left and right sides of the water inlet main pipe are respectively provided with a left upper water hole and a right upper water hole, which flow to the left side cylinder head water jacket and the right side cylinder head water jacket; the left side cylinder water jacket and the left side cylinder of the engine are in one-to-one correspondence, and the cylinder body is provided with a left lower water hole and a left water return channel which are connected with the left side cylinder water jacket and the left side cylinder head water jacket respectively and connected with the left water return pipe; the right side cylinder water jacket and the right side cylinder of the engine are in one-to-one correspondence, and the cylinder body is provided with a plurality of right lower water holes which are connected with the right side cylinder water jacket and the right side cylinder head water jacket respectively; and the cylinder body is further provided with a plurality of right water return channels which are connected with the right side cylinder water jacket and the right water return pipe respectively. The application has the advantages of high cooling liquid flow, high cooling efficiency and reduction of cavitation.

Description

Technical Field

[0001] This invention relates to the field of engine cooling system technology, and in particular to a V-shaped engine cooling water jacket with balanced flow and an engine. Background Technology

[0002] Currently, traditional V-type engine cylinders divide the cylinders into two groups, with adjacent cylinders arranged at a certain angle, so that the two groups of cylinders form a plane with an angle, and the cylinders are distributed in a V shape when viewed from the side. The V-type cylinder block generally consists of an upper V-shaped section and a lower crankcase.

[0003] Existing patent document CN119467121A discloses a V-type engine cooling water jacket and a V-type engine. The engine has an overall U-shaped structure. Based on the characteristic that the water inlet is set to the B side, the flow rate of coolant entering the B side is increased by setting a large curvature arc transition flow guiding structure, so as to achieve relative uniformity between the A and B sides. By setting an additional rib flow guiding structure, the water flow distribution is locally adjusted, reducing the flow rate of cylinders near the water inlet, thereby achieving uniform cooling of each cylinder and controlling the flow rate of cylinder B1, which can significantly improve the cooling uniformity of each cylinder.

[0004] 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

[0005] The main objective of this invention is to propose a V-shaped engine cooling water jacket and engine that can reduce cavitation and achieve balanced flow.

[0006] Therefore, this invention proposes a V-shaped engine cooling water jacket with balanced flow and an engine.

[0007] Preferably, the present invention may also have the following technical features:

[0008] A V-shaped engine cooling water jacket with balanced flow includes an inlet manifold, a left return manifold, a right return manifold, a cylinder head water jacket, and a cylinder water jacket. The cylinder water jacket includes a left cylinder water jacket and a right cylinder water jacket. The cylinder head water jacket includes a left cylinder head water jacket and a right cylinder head water jacket. The left and right sides of the inlet manifold are respectively provided with upper left water holes and upper right water holes connecting the left and right cylinder head water jackets. The left cylinder water jacket corresponds one-to-one with the left cylinder of the engine, and the cylinder body is provided with multiple lower left water holes respectively connecting each left cylinder water jacket and the left cylinder head water jacket. The cylinder body is also provided with multiple left return water channels respectively connecting the left return manifold and the left cylinder water jacket. The right cylinder water jacket corresponds one-to-one with the right cylinder of the engine, and the cylinder body is provided with multiple lower right water holes respectively connecting each right cylinder water jacket and the right cylinder head water jacket. The cylinder body is also provided with multiple right return water channels respectively connecting the right cylinder water jacket and the right return manifold.

[0009] Furthermore, the main water inlet pipe is provided with several upper left and upper right water holes at intervals.

[0010] Furthermore, each cylinder has a water inlet nearby.

[0011] Furthermore, the upper left water hole and the upper right water hole have the same structure, which is a gradient structure that is narrower at the top and wider at the bottom.

[0012] A V-shaped engine includes the aforementioned cooling water jacket, as well as a cylinder block and a cylinder head. The cylinder block includes a V-shaped section and a crankcase. Several left-side cylinders and right-side cylinders are respectively provided on both sides of the V-shaped section. The left-side cylinders and right-side cylinders are inclined, with the side closer to the V-shaped section being higher and the opposite side being lower.

[0013] Furthermore, the two ends of the lower left water hole are respectively connected to the lower side of the left cylinder water jacket and the upper side of the left cylinder head water jacket, and the two ends of the lower right water hole are respectively connected to the lower side of the right cylinder water jacket and the lower side of the left cylinder head water jacket.

[0014] Furthermore, the V-shaped section is provided with a main water inlet pipe, a left return water pipe, and a right return water pipe, with the left return water pipe and the right return water pipe located to the upper left and upper right of the main water inlet pipe, respectively.

[0015] Furthermore, the left and right return water channels are each provided with a guide groove that connects to the corresponding cylinder water jacket.

[0016] Furthermore, the guide grooves are located at the highest points of the water jackets of the left and right cylinders.

[0017] Furthermore, it also includes a degassing hole, which is provided in the left return water channel and the right return water channel respectively, and the upper end of the venting hole extends to the cylinder surface.

[0018] The beneficial effects of the present invention compared with the prior art include: (1) The coolant enters the lower part of the cylinder water jacket from the cylinder head water jacket through the lower water hole, and then flows to the upper part of the cylinder water jacket and merges into each return water channel. Such water flow direction can reduce cavitation. (2) The cylinder water jacket is arranged around the cylinder bore to cool the cylinder block and cylinder liner. After the coolant enters the cylinder water jacket, the two-stage water flows around both sides of the cylinder liner and merges into the return water pipe (left return water pipe and right return water pipe) in the return water channel (left return water pipe and right return water pipe). Attached Figure Description

[0019] Figure 1 This is a perspective view of the water circuit of the present invention. The cylinder water jacket surrounds the outside of the cylinder bore sand core, and the arrow indicates the direction of coolant flow.

[0020] Figure 2 This is a perspective view of the waterway side of the present invention.

[0021] Figure 3 This is a side view of the waterway of the present invention.

[0022] Figure 4 This is a three-dimensional view of the waterway of the present invention.

[0023] Figure 5 This is a three-dimensional view of the cylinder block water circuit of the present invention.

[0024] Figure 6 This is a cross-sectional view of the cylinder block of the present invention.

[0025] Figure 7 This is a schematic diagram of the flow channel dismissal of the present invention.

[0026] Figure 8 This is a schematic diagram of the guide channel sand core of the present invention.

[0027] Figure 9 This is a perspective view of the cylinder block of the present invention.

[0028] Figure 10 This is a side view of the cylinder block of the present invention. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] like Figure 1-10The diagram shows a V-shaped engine cooling water jacket with balanced flow, including an inlet manifold 4, a return manifold, and a cylinder water jacket 33. The cylinder water jacket 33 includes a left cylinder water jacket 332 and a right cylinder water jacket 333. The return manifold includes a left return manifold 7 and a right return manifold 5. The left and right sides of the inlet manifold 4 are respectively provided with an upper left water hole 34 and an upper right water hole 31, which flow to the left cylinder head water jacket 10 and the right cylinder head water jacket 9, respectively. The coolant in the inlet manifold 4 is introduced into the cylinder head water jackets (9, 10) through the upper left water hole 34 and the upper right water hole 31. The left cylinder water jacket 332 corresponds one-to-one with the left cylinder 14 of the engine, that is, each left cylinder 14 is provided with a corresponding left cylinder water jacket 332, and the cylinder body 1 is provided with multiple lower left water holes that connect the left cylinder water jacket 332 and the left cylinder head water jacket 10 respectively; the cylinder body 1 is also provided with multiple left return water channels 327 that connect the left return water pipe 7 and the left cylinder water jacket 332 respectively; the right cylinder water jacket 333 corresponds one-to-one with the right cylinder 13 of the engine, and the cylinder body 1 is provided with multiple lower right water holes that connect the right cylinder water jacket 333 and the right cylinder head water jacket 9 respectively; the cylinder body 1 is also provided with multiple right return water channels 328 that connect the right cylinder water jacket 333 and the right return water pipe 5 respectively. In this embodiment, since the centers of the left cylinder 14 and the right cylinder 13 are staggered, the upper left water hole 34 and the upper right water hole 31 are also staggered. In this embodiment, the coolant enters from the main water inlet pipe 4, flows into the left cylinder head water jacket 10 and the right cylinder head water jacket 9 through the upper left water hole 34 and the upper right water hole 31, then flows down into the left cylinder water jacket 332 and the right cylinder water jacket 333 through the lower left water hole and the lower right water hole, and finally flows into the left return water pipe 7 and the right return water pipe 5 through the left return water channel 327 and the right return water channel 328.

[0032] Preferably, the main water inlet pipe 4 is provided with a plurality of upper left water holes 34 and upper right water holes 31 spaced apart. The number of upper left water holes 34 and upper right water holes 31 is determined according to the number of cylinders in the engine. In a preferred arrangement, each cylinder is adjacent to a water hole (either an upper left water hole 34 or an upper right water hole 31). For example, taking a 12-cylinder V-type engine as an example, this engine has 6 left-side cylinders and 6 right-side cylinders. Among them, there is one upper left water hole 34 between the 1st and 2nd cylinders, between the 3rd and 4th cylinders, and between the 5th and 6th cylinders of the left-side cylinders 14. Similarly, the arrangement of the upper right water holes 31 is the same as that of the upper left water holes 34, with 3 upper right water holes 31. That is, when the number of cylinders is even, the sum of the upper left water holes 34 or the upper right water holes 31 is half of the number of cylinders.

[0033] The upper left water hole 34 and the upper right water hole 31 have the same structure, forming a combined upper water hole (31, 34). The upper water hole adopts a gradient design that is narrower at the top and wider at the bottom. Preferably, the upper water hole includes an arc segment and a straight segment, with the two ends of the arc segment connected to the straight segment and the main water inlet pipe 4, respectively. In this way, as the coolant flows from the main water inlet pipe to the cylinder head, the gradient design of being narrower at the top and wider at the bottom gradually increases the flow rate of the coolant.

[0034] Reference Figure 7-10 The V-shaped engine shown includes the aforementioned cooling water jacket, comprising a cylinder block 1 and a cylinder head. The cylinder block 1 includes a V-shaped section 11 and a crankcase 12. A plurality of left-side cylinders 14 and right-side cylinders 13 are respectively arranged on both sides of the V-shaped section 11. The left-side cylinders 14 and right-side cylinders 13 are inclined, with the side closer to the V-shaped section 11 being higher and the opposite side being lower. Preferably, the V-shaped section 11 also includes a main oil passage 2, sand cleaning holes (3,8), weight reduction holes 6, a main water inlet pipe 4, a left return water pipe 7, and a right return water pipe 5.

[0035] The two ends of the left lower water hole are respectively connected to the low side 3321 of the left cylinder water jacket 332 and the low side 102 of the left cylinder head water jacket 10. The two ends of the right lower water hole are respectively connected to the low side 3331 of the right cylinder water jacket 333 and the low side 92 of the right cylinder head water jacket 9. With this water circulation design, the coolant enters the low position (3321, 3331) of the cylinder water jacket 33 from the cylinder head water jacket (9, 10) through the lower water hole, and then flows to the high position of the cylinder water jacket 33 and merges into each return water channel 32. This water flow direction can reduce cavitation. In this embodiment, the cylinder water jacket 33 is arranged around the cylinder bore to cool the cylinder block 1 and the cylinder liner. After the coolant enters the cylinder water jacket 33, the water flows in two layers around both sides of the cylinder liner and merges into the return water pipe (left return water channel 327 and right return water channel 328) and enters the return water pipe (left return water pipe 7 and right return water pipe 5). Refer to the attached diagram for water flow direction. Figure 1 .

[0036] Preferably, the V-shaped section 11 is provided with a main water inlet pipe 4, a left return water pipe 7 and a right return water pipe 5. Preferably, the left return water pipe 7 and the right return water pipe 5 are located at the upper left and upper right of the main water inlet pipe 4.

[0037] Preferably, the cylinder on the cylinder block 1 has a cylinder bore 15, and a support shoulder 17 is provided in the middle of the cylinder bore 15. The cylinder liner 16 is installed in the cylinder bore 15 and is limited by the support shoulder 17. The cylinder liner 16 and the support shoulder 17 are positioned by surface contact. There is a gap between the outer side of the cylinder liner 16 and the support shoulder 17. When the coolant flows from the cylinder water jacket 33 to the return water pipe (5,7), it is easy for air to accumulate at the highest position of the cylinder water jacket 33, causing cavitation. To solve this problem, a guide groove 322 is opened at the highest position of the cylinder water jacket 33, and the guide groove 322 is used to connect the highest position of the cylinder water jacket 33 with the return water channel 32. In this way, since the cylinder is inclined, the highest point of the cylinder water jacket 33 is located at the apex of the cylinder water jacket 33 near the V-shaped part 1. When arranging the return water channel 32, the return water channel 32 connects to the upper part of the cylinder water jacket 33 to facilitate the exhaust of the guide groove 322.

[0038] Preferably, it also includes a degassing hole 321, the lower end of which is connected to the return water channel 32 and the upper end extends to the cylinder surface. The gas drawn out of the guide groove 322 is discharged through the degassing hole 321, and the gas drawn out of the guide groove 322 also enters the return water pipe and is degassed by the degassing system of the return water pipe.

[0039] In the above embodiment, the main coolant passages (inlet manifold 4, left return manifold 7, and right return manifold 5) are concentrated in the engine's core area, completely freeing up space outside the engine. This greatly facilitates the arrangement of the turbocharger, intake system, aftertreatment device, accessory brackets, etc., on both sides and top of the engine, making the entire powertrain more compact and beneficial for overall vehicle layout (reducing hood height, improving collision safety, etc.). Moreover, the inlet manifold 4, left return manifold 7, and right return manifold 5 effectively increase the cooling water chamber volume of the cylinder block 1, significantly improving the engine's cooling effect and fully utilizing the coolant for heat exchange.

[0040] The traditional external, crisscrossing water piping has been significantly simplified, replaced by a short channel integrated within the cylinder block 1. This reduces potential leak points, lowers the risk of piping fatigue due to vibration, and improves the inherent reliability of the system. It also reduces weight and assembly complexity.

[0041] The area above the V-shaped section 11 is typically a high-heat accumulation zone, including the turbocharger, exhaust manifold junction, and EGR mixing area. By placing the main water inlet pipe 4 within the V-shaped section 11, the coolant flow can directly provide "enclosed" or "sandwiched" cooling to these areas. This effectively controls excessively high temperatures in and above the V-shaped section 11, protecting surrounding components (such as sensors and wiring harnesses), reducing the adverse effects of heat radiation on engine oil and intake air temperature, and improving the overall engine's thermal protection capabilities.

[0042] Water flow noise and cavitation (cavitation) are among the main sources of engine noise. A centralized water channel design reduces pipe joints and sharp bends, resulting in smoother flow. Incorporating coolant passages in the V-section 11 reduces coolant flow noise. Simultaneously, the more rigid structure suppresses structural vibration transmission, contributing to a quieter driving experience, which is crucial for NVH targets in luxury cars and high-end commercial vehicles.

[0043] As can be seen, the engine coolant passage of this invention transcends its simple cooling function, evolving into a core system module integrating structural support, thermal management hub, and space-optimized carrier. This design is an inevitable choice for top-tier performance, ultimate efficiency, ultra-long lifespan, and luxurious quality, and is particularly suitable for competing with the latest generation of heavy-duty commercial vehicles, luxury high-performance sedans, and special power platforms in Europe.

[0044] 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.

[0045] 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 V-shaped engine cooling water jacket with balanced flow, comprising an inlet manifold, a left return water pipe, a right return water pipe, a cylinder head water jacket, and a cylinder water jacket, wherein the cylinder water jacket comprises a left cylinder water jacket and a right cylinder water jacket, and the cylinder head water jacket comprises a left cylinder head water jacket and a right cylinder head water jacket, characterized in that, The main inlet pipe has upper left and upper right water holes on its left and right sides, respectively, connecting the left cylinder head water jacket and the right cylinder head water jacket. The left cylinder water jacket corresponds one-to-one with the left cylinder of the engine, and the cylinder body has multiple lower left water holes connecting each left cylinder water jacket and the left cylinder head water jacket. The cylinder body also has multiple left return water channels connecting the left return water pipe and the left cylinder water jacket. The right cylinder water jacket corresponds one-to-one with the right cylinder of the engine, and the cylinder body has multiple lower right water holes connecting each right cylinder water jacket and the right cylinder head water jacket. The cylinder body also has multiple right return water channels connecting the right cylinder water jacket and the right return water pipe.

2. The V-shaped engine cooling water jacket with balanced flow as described in claim 1, characterized in that: The main water inlet pipe is provided with several upper left and upper right water holes at intervals.

3. The V-shaped engine cooling water jacket with balanced flow as described in claim 2, characterized in that: Each cylinder has a water inlet nearby.

4. The V-shaped engine cooling water jacket with balanced flow as described in claim 1, characterized in that: The upper left and upper right water holes have the same structure, which is a gradient structure that is narrower at the top and wider at the bottom.

5. A V-shaped engine, comprising the cooling water jacket as described in any one of claims 1-4, characterized in that: It also includes a cylinder block and a cylinder head. The cylinder block includes a V-shaped section and a crankcase. Several left-side cylinders and right-side cylinders are respectively provided on both sides of the V-shaped section. The left-side cylinders and right-side cylinders are inclined, and the side closer to the V-shaped section is in a higher position, while the opposite side is in a lower position.

6. The V-shaped engine as described in claim 5, characterized in that: The two ends of the lower left water hole are respectively connected to the lower side of the left cylinder water jacket and the upper side of the left cylinder head water jacket, and the two ends of the lower right water hole are respectively connected to the lower side of the right cylinder water jacket and the lower side of the left cylinder head water jacket.

7. The V-shaped engine as described in claim 5, characterized in that: The V-shaped section is equipped with a main inlet pipe, a left return pipe, and a right return pipe, with the left and right return pipes located to the upper left and upper right of the main inlet pipe, respectively.

8. The V-shaped engine as described in claim 5, characterized in that: The left and right return water channels are respectively equipped with guide channels that connect to the corresponding cylinder water jackets.

9. The V-shaped engine as described in claim 8, characterized in that: The guide channels are located at the highest points of the water jackets of the left and right cylinders.

10. The V-shaped engine as described in claim 9, characterized in that: It also includes a degassing hole, which is provided in the left return water channel and the right return water channel respectively, and the upper end of the venting hole extends to the cylinder surface.

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