Cylinder block water jacket

Abstract

The present disclosure provides a cylinder block water jacket, comprising: a body, a cylinder block water inlet, and a cylinder block water outlet; the body is sleeved on the outer wall of the cylinder bore; the body includes a plurality of cylinder bore water jackets that are sequentially communicated; a water separation plate is arranged in the inner cavity of the body; the first end of the body in the first direction is in a wavy structure; the cylinder block water inlet is arranged on the exhaust side of the first end of the body in the second direction and is communicated with the body; the cylinder block water outlet is arranged on the intake side of the first end of the body in the second direction and is communicated with the body; the coolant enters the inner cavity of the body from the cylinder block water inlet, flows unidirectionally along a U shape in the inner cavity of the body, and flows out from the cylinder block water outlet. In the present disclosure, the coolant flows unidirectionally along a U shape, forming a large pressure difference between adjacent cylinders, effectively cooling between the cylinder bores, reducing the temperature between cylinders, and reducing the risk of engine oil coking.

Description

Technical Field

[0001] The present disclosure relates to the field of engines, and particularly to a cylinder block water jacket. Background Art

[0002] The engine cylinder block water jacket exists in the space area between the cylinder bore and the outer wall of the cylinder block. Its main function is to cool the cylinder wall during the operation of the engine, and it is also responsible for the distribution of the cooling water of the whole machine. Currently, the intensification degree of the engine is continuously increasing, the torque per liter and the explosion pressure are continuously rising, so the requirements for cylinder bore cooling are becoming more and more stringent. If the cooling is poor, local overheating areas will appear in the cylinder, causing the engine oil to coke, which will cause knocking and even cylinder scoring. Summary of the Invention

[0003] (1) Technical Problems to be Solved

[0004] The present disclosure provides a cylinder block water jacket to solve the above-mentioned technical problems.

[0005] (2) Technical Solutions

[0006] According to one aspect of the present disclosure, a cylinder block water jacket is provided, including:

[0007] A body, sleeved on the outer wall of the cylinder bore; the body includes a plurality of cylinder bore water jackets that are sequentially connected; a water separation plate is arranged in the inner cavity of the body; the first end of the body along the first direction is in a wavy structure;

[0008] A cylinder block water inlet, arranged on the exhaust side of the first end of the body in the second direction, and communicated with the body;

[0009] A cylinder block water outlet, arranged on the intake side of the first end of the body in the second direction, and communicated with the body;

[0010] Cooling liquid enters the inner cavity of the body from the cylinder block water inlet, flows unidirectionally in a U shape in the inner cavity of the body, and flows out from the cylinder block water outlet.

[0011] In some embodiments of the present disclosure, the maximum distance from the first end to the second end of the body along the first direction is h max , the height of the cylinder block cylinder liner is H, where h max The value range of / H is 50% to 60%.

[0012] In some embodiments of the present disclosure, the minimum distance from the first end to the second end of the body along the first direction is h min Located at the connection position of two adjacent cylinder bore water jackets.

[0013] In some embodiments of the present disclosure, it further includes:

[0014] An inlet water collecting tank, which is connected to the cylinder block water inlet and is also connected to the body; the inlet water collecting tank is connected to the cylinder head water inlet;

[0015] A pump volute, which is connected to the inlet water collecting tank;

[0016] An outlet water collecting tank, the water inlet of which is connected to the cylinder head water inlet; the outlet water collecting tank further includes:

[0017] A cylinder head water outlet, which is arranged at the first end of the outlet water collecting tank along the second direction.

[0018] In some embodiments of the present disclosure, the outlet water collecting tank further includes:

[0019] An oil cooler water intake port, which is arranged at the first end of the outlet water collecting tank along the first direction;

[0020] An oil cooler, which is arranged at the first end of the body along the first direction; the water inlet of the oil cooler is connected to the pump volute, and the water outlet of the oil cooler is connected to the oil cooler water intake port.

[0021] In some embodiments of the present disclosure, the length of the inlet water collecting tank is l, and the length of the body in the second direction is L, where the value range of l / L is 30% to 50%.

[0022] In some embodiments of the present disclosure, the outlet water collecting tank further includes: an EGR cooler water intake port, which is arranged at the second end of the outlet water collecting tank along the second direction.

[0023] In some embodiments of the present disclosure, it further includes:

[0024] A water hole, which is located at the position where two cylinder bore water jackets are connected, and both ends of the water hole are connected to the cylinder bore water jackets; the water hole is inclined, and the coolant in the water hole flows from the exhaust side to the intake side.

[0025] In some embodiments of the present disclosure, the cross-sectional shape of the water hole is selected from one or more of Y-shaped, V-shaped, and X-shaped.

[0026] In some embodiments of the present disclosure, the number of cylinder bore water jackets is n, where n > 1.

[0027] (III) Beneficial effects

[0028] It can be seen from the above technical solutions that the cylinder block water jacket of the present disclosure has at least one or a part of the following beneficial effects:

[0029] (1) The arrangement of the water baffle and the positions of the inlets and outlets of the cylinder block in the present disclosure enables the coolant to flow unidirectionally along a U shape, creating a large pressure difference between adjacent cylinders, effectively cooling the spaces between the cylinder bores, reducing the temperature between the cylinders, and decreasing the risk of engine oil coking.

[0030] (2) The wavy structure at the end of the body in the present disclosure is conducive to uniform cooling and has a better heat dissipation effect.

[0031] (3) By limiting the ratio of the height of the body to the height of the cylinder block in the present disclosure, effective cooling of only the upper part of the cylinder bore is achieved. The lower part of the cylinder bore dissipates heat through the outer wall. The engine oil temperature on the lower wall surface of the cylinder bore is slightly higher, and the viscosity decreases, effectively reducing the friction between the piston and the cylinder bore.

[0032] (4) In the present disclosure, the cooling water outlet of the cylinder block is separated from the cooling water outlet of the cylinder head, and their flows do not affect each other. A thermostat can be added to independently control the temperature of the cooling water in the cylinder block, making the temperature of the cylinder block slightly higher, reducing friction, and improving fuel economy.

[0033] (5) In the present disclosure, the engine oil cooler is arranged at the front end of the body. At the same time, the inlet and outlet of the engine oil cooler are respectively connected to the water pump volute and the engine oil cooler water intake port provided on the outlet water collecting tank, eliminating the water intake and return pipelines of the engine oil cooler, reducing the pipelines of the whole machine, and making the structure compact. Description of the Drawings

[0034] Figure 1 It is a schematic diagram of the cylinder block water jacket structure of the embodiment of the present disclosure.

[0035] Figure 2 It is a schematic side view structure diagram of the body of the embodiment of the present disclosure.

[0036]

Main Element Symbols Explanation of the Embodiment of the Present Disclosure in the Drawings

[0037] 1 - Body;

[0038] 2 - Cylinder Block Inlet;

[0039] 3 - Cylinder Block Outlet;

[0040] 4 - Water Pump Volute;

[0041] 5 - Inlet Water Collecting Tank;

[0042] 6 - Outlet Water Collecting Tank;

[0043] 7 - Cylinder Head Outlet;

[0044] 8 - Engine Oil Cooler Water Intake Port;

[0045] 9 - Engine Oil Cooler;

[0046] 10 - EGR Cooler Water Intake Port;

[0047] 11 - water hole. Detailed implementation manners

[0048] The present disclosure provides a cylinder block water jacket, including: a body, a cylinder block water inlet, and a cylinder block water outlet; the body is sleeved on the outer wall of the cylinder bore; the body includes a plurality of cylinder bore water jackets that are sequentially communicated; a water separation plate is arranged in the inner cavity of the body; the first end of the body in the first direction is in a wavy structure; the cylinder block water inlet is arranged on the exhaust side of the first end of the body in the second direction and is communicated with the body; the cylinder block water outlet is arranged on the intake side of the first end of the body in the second direction and is communicated with the body; the coolant enters the inner cavity of the body from the cylinder block water inlet, flows unidirectionally in a U shape in the inner cavity of the body, and flows out from the cylinder block water outlet. In the present disclosure, the coolant flows unidirectionally in a U shape, forming a large pressure difference between adjacent cylinders, effectively cooling between the cylinder bores, reducing the temperature between the cylinders, and reducing the risk of oil coking.

[0049] To make the purpose, technical solutions, and advantages of the present disclosure clearer and more understandable, the following further describes the present disclosure in detail with reference to specific embodiments and the accompanying drawings.

[0050] Some embodiments of the present disclosure will be described more comprehensively hereinafter with reference to the accompanying drawings, and some but not all of the embodiments will be shown. In fact, the various embodiments of the present disclosure can be implemented in many different forms and should not be construed as limited to the embodiments described herein; rather, these embodiments are provided so that the present disclosure meets the applicable legal requirements.

[0051] The design of the cylinder block water jacket should not only meet the good cooling of the cylinder bore, but also organize and distribute the cooling water flow of the whole machine, and try to reduce the peripheral pipelines and the overall size of the engine. The traditional cylinder block water jacket is a longitudinal deep water jacket, which enters water from the front end or the rear end and flows longitudinally along the cylinder block. Due to its own flow mode, the water pressures on the exhaust (left and right) sides of the cylinder block water jacket are basically the same, and the pressure difference between the two cylinder joints is small, and the water holes between the cylinders cannot form an effective flow, resulting in too high temperature at local positions between the cylinders of the cylinder block.

[0052] In the first exemplary embodiment of the present disclosure, a cylinder block water jacket is provided. Figure 1 It is a schematic structural diagram of the cylinder block water jacket according to the embodiment of the present disclosure. As Figure 1As shown in the figure, the cylinder block water jacket of the present disclosure includes: a main body 1, a cylinder block water inlet 2, a cylinder block water outlet 3, a water pump volute 4, a water inlet collecting tank 5, a water outlet collecting tank 6, a cylinder head water inlet, a cylinder head water outlet 7, an oil cooler water intake 8, an oil cooler 9, an EGR cooler water intake 10, and a water hole 11. A partition plate is provided in the inner cavity of the main body 1; the cylinder block water inlet 2 is provided on the exhaust side of the first end of the main body in the second direction (Y direction), and is communicated with the main body 1; the cylinder block water outlet 3 is provided on the intake side of the first end of the main body 1 in the second direction, and is communicated with the main body 1; the coolant enters the inner cavity of the main body 1 from the cylinder block water inlet 2, flows unidirectionally along a U shape in the inner cavity of the main body 1, and flows out from the cylinder block water outlet 3. The coolant of the present disclosure flows unidirectionally along a U shape, forming a large pressure difference between adjacent cylinders, effectively cooling between cylinder bores, reducing the temperature between cylinders, and reducing the risk of oil coking.

[0053] The following will separately describe each component of the cylinder block water jacket of this embodiment in detail.

[0054] The main body 1 has a wavy structure at the first end along the first direction (X direction). More specifically, in addition, the minimum distance from the first end to the second end of the main body 1 along the first direction is h min It is located at the connection position of two adjacent cylinder bore water jackets. Such a structure is conducive to changing the cooling water flow rate, achieving uniform cooling, and having a better heat dissipation effect. The main body 1 is a plurality of successively connected cylinder bore water jackets sleeved on the outer wall of the cylinder bore. The number of cylinder bore water jackets is n, where n > 1. In this embodiment, the number of cylinder bore water jackets is four.

[0055] In addition, regarding the height of the cylinder bore water jacket, it should be noted that the maximum distance from the first end to the second end of the main body 1 along the first direction is h max , the height of the cylinder block cylinder liner is H, where h max The value range of / H is 50% - 60%, that is, the maximum height of the main body 1 is 50% - 60% of the cylinder block height, so as to achieve effective cooling only for the upper part (the second end in the first direction) of the cylinder bore, and the lower part (the first end along the first direction) of the cylinder bore dissipates heat through the outer wall. The oil temperature on the lower wall surface of the cylinder bore is slightly higher and the viscosity is reduced, effectively reducing the friction between the piston and the cylinder bore. At the same time, the shallow water jacket reduces the cooling water capacity, can shorten the engine warm-up time, and thus can improve the emissions during the engine start-up preheating process. It effectively solves the problems of the traditional water jacket having a relatively large depth, accounting for about 70% of the engine cylinder liner length, a large water jacket volume, a long engine warm-up time, and poor start-up emissions.

[0056] An inlet water collecting tank 5 and an outlet water collecting tank 6. The inlet water collecting tank 5 is connected to the cylinder block water inlet 2 and is also connected to the body 1; the inlet water collecting tank 5 is connected to the cylinder head water inlet; the water pump volute 4 is connected to the inlet water collecting tank 5. Specifically, the length of the inlet water collecting tank 5 is 1, and the length of the body 1 in the second direction is L, where the value range of 1 / L is 30% to 50%. The water inlet of the outlet water collecting tank 6 is connected to the cylinder head water inlet; the outlet water collecting tank 6 further includes: a cylinder head water outlet 7, which is arranged at the first end of the outlet water collecting tank 6 along the second direction. In the embodiment, the cylinder block cooling water outlet and the cylinder head cooling water outlet are separated and do not affect each other's flow. A thermostat can be added to separately control the temperature of the cylinder block cooling water, making the cylinder block temperature slightly higher, reducing friction, and improving fuel economy.

[0057] An oil cooler 9, which is arranged at the first end of the body 1 along the first direction; the water inlet of the oil cooler 9 is connected to the water pump volute 4, and the water outlet of the oil cooler 9 is connected to the oil cooler water intake 8. The oil cooler water intake 8 is arranged at the first end of the outlet water collecting tank 6 along the first direction. In this embodiment, the oil cooler 9 is arranged at the front end of the body 1. At the same time, the water inlet and the water outlet of the oil cooler 9 are respectively connected to the water pump volute 4 and the oil cooler water intake 8 arranged on the outlet water collecting tank 6, canceling the oil cooler water intake and return water pipelines, reducing the whole machine's pipelines and making the structure compact.

[0058] An EGR cooler water intake 10, which is arranged at the second end of the outlet water collecting tank 6 along the second direction.

[0059] A water hole 11, which is located at the position where two cylinder bore water jackets are connected, and both ends of the water hole 11 are connected to the cylinder bore water jackets. The coolant in the water hole 11 flows from the exhaust side to the intake side. The water hole 11 is in a Y-shaped structure and / or an X-shaped structure.

[0060] The water flow in the inner cavity of the body 1 is such that water enters from the water pump volute 4 into the inlet water collecting tank 5, enters the inner cavity of the body 1 through the cylinder block water inlet 2 below the inlet water collecting tank 5, and circulates separately from the cylinder head coolant. The partition plate prevents the coolant from flowing along the first end in the second direction and guides the water flow to flow along the second end in the second direction. The water flow flows unidirectionally in a U shape in the inner cavity of the body 1, and the coolant flows out from the cylinder block water outlet 3 on the intake side at the first end of the body 1 in the second direction.

[0061] The cylinder head water flow is such that it enters the cylinder head from the inlet water collecting tank 5 through the cylinder head water inlet. After the cylinder head return water flows into the outlet water collecting tank 6, a part of it flows out through the cylinder head water outlet 7 arranged on the outlet water collecting tank 6. The cylinder block coolant and the cylinder head coolant circulate separately and do not affect each other's flow. A thermostat can be added to separately control the temperature of the cylinder block cooling water, making the cylinder block temperature slightly higher, reducing friction, and improving fuel economy.

[0062] After the return water of the cylinder head flows into the water outlet collecting tank 6, a part of it flows through the oil cooler water intake 8 to cool the oil cooler 9, and then returns to the pump volute 4 through the oil cooler 9. Another part cools the EGR exhaust gas through the EGR cooler water intake 10 and then returns to the pump volute 4.

[0063] So far, the embodiments of the present disclosure have been described in detail with reference to the accompanying drawings. It should be noted that, in the accompanying drawings or the text of the specification, the implementation manners that are not illustrated or described are all forms known to those of ordinary skill in the art and have not been described in detail. In addition, the definitions of the above-mentioned various elements and methods are not limited to the specific structures, shapes or manners mentioned in the embodiments, and those of ordinary skill in the art can make simple changes or replacements thereto.

[0064] Based on the above description, those skilled in the art should have a clear understanding of the cylinder block water jacket of the present disclosure.

[0065] In summary, the present disclosure provides a cylinder block water jacket, which enables the coolant to flow unidirectionally along a U shape, forms a large pressure difference between adjacent cylinders, effectively cools between the cylinder bores, reduces the temperature between cylinders, and reduces the risk of oil coking, and has broad application prospects in the fields of internal combustion engines, automobiles, etc.

[0066] It should also be noted that the directional terms mentioned in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., are only references to the directions in the accompanying drawings and are not used to limit the protection scope of the present disclosure. Throughout the accompanying drawings, the same elements are denoted by the same or similar reference numerals. When it may cause confusion in the understanding of the present disclosure, the conventional structures or configurations will be omitted.

[0067] And the shapes and sizes of the components in the drawings do not reflect the true sizes and proportions, but only illustrate the content of the embodiments of the present disclosure. In addition, in the claims, any reference signs placed between parentheses shall not be construed as limiting the claims.

[0068] Unless otherwise known to the contrary, the numerical parameters in this specification and the appended claims are approximate values and can be changed according to the required characteristics obtained through the content of the present disclosure. Specifically, all the numbers representing the contents of the components, reaction conditions, etc. used in the specification and the claims should be understood to be modified by the term "about" in all cases. Generally, the meaning expressed is that it includes a change of ±10% in some embodiments, a change of ±5% in some embodiments, a change of ±1% in some embodiments, and a change of ±0.5% in some embodiments for a specific quantity.

[0069] Furthermore, the word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.

[0070] As used in the specification and claims, ordinal numbers such as "first", "second", "third", etc. are used to modify the corresponding elements, and do not in themselves mean that the elements have any ordinal significance, nor do they represent the order of one element with respect to another element or the order in a manufacturing method. The use of these ordinal numbers is only for the purpose of clearly distinguishing one element having a certain name from another element having the same name.

[0071] Similarly, it should be understood that, for the purpose of streamlining the present disclosure and facilitating the understanding of one or more of the various disclosed aspects, in the foregoing description of the exemplary embodiments of the present disclosure, the various features of the present disclosure are sometimes grouped together into a single embodiment, figure, or description thereof. However, the disclosed method should not be construed as reflecting an intention that the claimed present disclosure requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, the disclosed aspects lie in less than all of the features of the single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into the detailed description, where each claim stands on its own as a separate embodiment of the present disclosure.

[0072] The specific embodiments described above further elaborate on the object, technical solution, and beneficial effects of the present disclosure. It should be understood that the above description is only for the specific embodiments of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure should be included within the protection scope of the present disclosure.

Claims

1. A cylinder block water jacket, wherein, Comprising: A body sleeved on the outer wall of the cylinder bore; the body includes a plurality of cylinder bore water jackets that are sequentially connected; A partition plate is arranged in the inner cavity of the body; The first end of the body along the first direction has a wavy structure; the maximum distance from the first end to the second end of the body along the first direction is h max , the height of the cylinder liner of the cylinder block is H, where h max / H ranges from 50% to 60%; A cylinder block water inlet is arranged on the exhaust side at the first end of the body in the second direction and is communicated with the body; A cylinder block water outlet is arranged on the intake side at the first end of the body in the second direction and is communicated with the body; A water inlet collecting tank is connected to the cylinder block water inlet and is also connected to the body; the water inlet collecting tank is connected to the cylinder head water inlet; A water pump volute is connected to the water inlet collecting tank; A water outlet collecting tank, comprising: A cylinder head water outlet is arranged at the first end of the water outlet collecting tank along the second direction; An oil cooler water intake is arranged at the first end of the water outlet collecting tank along the first direction; An oil cooler is arranged at the first end of the body along the first direction; the water inlet of the oil cooler is connected to the water pump volute, and the water outlet of the oil cooler is connected to the oil cooler water intake; The coolant enters the inner cavity of the body from the cylinder block water inlet, flows unidirectionally along a U shape in the inner cavity of the body, and flows out from the cylinder block water outlet.

2. The cylinder block water jacket according to claim 1, wherein, The minimum distance from the first end to the second end of the body along the first direction is h min It is located at the position where two of the cylinder bore water jackets are joined 3. The cylinder block water jacket according to claim 1, wherein, The length of the water inlet collecting tank is l, and the length of the body in the second direction is L, where the value range of l / L is 30% - 50%.

4. The cylinder block water jacket according to claim 1, wherein, The water outlet collecting tank further includes: an EGR cooler water intake arranged at the second end of the water outlet collecting tank along the second direction.

5. The cylinder block water jacket according to claim 1, wherein, Further comprising: A water hole is located at the joint position of two cylinder bore water jackets, and both ends of the water hole are communicated with the cylinder bore water jackets; the water hole is inclined, and the coolant in the water hole flows from the exhaust side to the intake side.

6. The cylinder block water jacket according to claim 5, wherein, The cross-sectional shape of the water hole is selected from one or more of Y-shaped, V-shaped, and X-shaped.

7. The cylinder block water jacket according to claim 1, wherein, The number of the cylinder bore water jackets is n, where n > 1.

Images