Diesel engine cylinder sleeve water cooling system and control method thereof

Abstract

The invention provides a diesel engine cylinder sleeve water cooling system and a control method thereof. The diesel engine cylinder sleeve water cooling system comprises a cylinder sleeve cooling assembly, a cylinder cover cooling assembly, a temperature sensor, a throttling valve and a processor. The cylinder sleeve cooling assembly is installed in the machine body and comprises a first liquid accumulation cavity, spiral water cavities and a second liquid accumulation cavity, an annular cylindrical space is formed between the outer wall of a cylinder sleeve in the machine body and the inner wall of the machine body, and the annular cylindrical space is divided by a plurality of spiral base bodies to form the multiple spiral water cavities. The bottom end of the spiral water cavity is communicated with a liquid outlet of the first liquid accumulation cavity, and the top end of the spiral water cavity is communicated with a liquid inlet of the second liquid accumulation cavity; the cylinder cover cooling assembly is installed in the cylinder cover body and comprises an air inlet bypass circulating water channel and an air outlet bypass circulating water channel, and an air inlet bypass connecting water channel, an air outlet bypass connecting water channel, a guiding water channel, an air inlet channel and an air outlet channel are further installed in the cylinder cover body. The system has the beneficial effects that the cooling efficiency of the system is improved, and cleaning is convenient and fast.

Description

Technical Field

[0001] The present invention belongs to the technical field of diesel engines, and particularly relates to a diesel engine cylinder liner water cooling system and a control method thereof. Background Technique

[0002] The working process of a diesel engine has many similarities with that of a gasoline engine. Each working cycle experiences four strokes: intake, compression, power, and exhaust. However, since the fuel used in a diesel engine is diesel, its viscosity is greater than that of gasoline, it is not easy to evaporate, and its self-ignition temperature is lower than that of gasoline. Therefore, the formation and ignition method of the combustible mixture are different from those of a gasoline engine. The mixture in the cylinder of a diesel engine is compression-ignited, not spark-ignited. When working, air enters the cylinder. When the air is compressed to the end in the cylinder, the temperature can reach 500 - 700 °C and the pressure can reach 40 - 50 atmospheres. When the piston approaches the top dead center, the fuel injector of the fuel supply system injects fuel into the cylinder combustion chamber at an extremely high pressure in an extremely short time. The diesel forms fine oil particles and mixes with the high-temperature and high-pressure air. The combustible mixture self-ignites and expands violently to generate an explosive force to push the piston to do work. At this time, the temperature can reach 1900 - 2000 °C and the pressure can reach 60 - 100 atmospheres.

[0003] The existing water cooling structure in a diesel engine cylinder liner adopts a winding distribution with a cooling water chamber, water pipes, etc. Although it can take away part of the heat generated by the diesel engine cylinder, the coolant flowing in the water chamber cannot fully dissipate the heat, resulting in some warm coolant passing through the diesel cylinder again, greatly reducing the heat dissipation effect. At the same time, the coolant flows in the water chamber for a long time, and more dirt is likely to accumulate on the inner wall, making it inconvenient for subsequent cleaning. Therefore, the existing technology has problems such as low cooling efficiency and difficult cleaning, and it is urgent to improve the cooling performance of the diesel engine cylinder liner water cooling structure. Summary of the Invention

[0004] In view of this, the present invention aims to propose a diesel engine cylinder liner water cooling system and a control method thereof to solve the problems of low cooling efficiency and difficult cleaning of the existing diesel engine cylinder liner water cooling system.

[0005] To achieve the above object, the technical solution of the present invention is realized as follows:

[0006] In a first aspect, the present invention provides a diesel engine cylinder liner water cooling system, including a cylinder liner cooling assembly, a cylinder head cooling assembly, a temperature sensor, a throttle valve, and a processor;

[0007] The cylinder liner cooling assembly is installed inside the body of the engine, and includes a first liquid accumulation chamber, a spiral water chamber, and a second liquid accumulation chamber. A circular cylindrical space is formed between the outer wall of the cylinder liner and the inner wall of the engine body inside the engine body, and the circular cylindrical space is divided by a spiral base into a plurality of spiral water chambers. The bottom end of the spiral water chamber is communicated with the liquid outlet of the first liquid accumulation chamber, and the top end is communicated with the liquid inlet of the second liquid accumulation chamber;

[0008] The cylinder head cooling assembly is installed inside the cylinder head body and includes an intake side circulation water channel and an exhaust side circulation water channel. An intake side connection water channel, an exhaust side connection water channel, a guiding water channel, an intake passage, and an exhaust passage are also installed inside the cylinder head body. Both the intake side connection water channel and the exhaust side connection water channel communicate with the second liquid accumulation cavity. The liquid inlet of the intake side circulation water channel communicates with the intake side connection water channel, and the liquid inlet of the exhaust side circulation water channel communicates with the exhaust side connection water channel. The liquid outlets of both the intake side circulation water channel and the exhaust side circulation water channel communicate with the guiding water channel;

[0009] The cylinder head body is located above the engine block body, and mounting holes are provided around the cylinder head body;

[0010] The temperature sensors are installed at the first liquid accumulation cavity, the second liquid accumulation cavity, the outlet of the intake side circulation water channel, the outlet of the exhaust side circulation water channel, and the water outlet. The throttle valves are installed at the outlets of the intake side circulation water channel and the exhaust side circulation water channel. The processor is respectively connected to the temperature sensors and the throttle valves.

[0011] Further, the spiral water cavity is a spiral upward flow channel and surrounds at least three-quarters of the cylindrical space. The spiral water cavities do not communicate with each other.

[0012] Further, the intake side circulation water channel and the exhaust side circulation water channel are respectively arranged in an S-shaped spiral around the pipe walls of the intake passage and the exhaust passage.

[0013] Further, the average diameter of the pipeline of the exhaust side circulation water channel is larger than that of the intake side circulation water channel.

[0014] Further, a water outlet is installed at the top of the cylinder head body, and a water inlet is installed at the bottom of the engine block body. The water outlet communicates with the guiding water channel, and the water inlet communicates with the liquid inlet of the first liquid accumulation cavity;

[0015] Further, the spiral base is a partition board in the shape of a spiral curve, and its width is equal to the distance between the outer wall of the cylinder liner and the inner wall of the engine block. The bottom end of the spiral base is connected to the upper surface of the first liquid accumulation cavity, and the top end is connected to the lower surface of the second liquid accumulation cavity.

[0016] Further, the curvature of each spiral base is equal, and the volume of each spiral water cavity is equal.

[0017] Further, the distance between the two spiral bases forming the spiral water cavity is related to the area where the spiral water cavity is located. The distance in the area close to the exhaust port is larger than the distance in the area close to the intake port.

[0018] Second aspect, based on the same inventive concept, the present invention also provides a control method for a diesel engine cylinder liner water cooling system, including the following steps:

[0019] S1. If the outlet temperature of the intake side circulation water channel is greater than the outlet temperature of the exhaust side circulation water channel, the processor adjusts the throttle valve at the outlet of the intake side circulation water channel until the two temperatures are equal, and then restores the throttle valve at the outlet of the intake side circulation water channel to the preset initial flow rate;

[0020] S2. If the outlet temperature of the intake side circulation water channel is less than the outlet temperature of the exhaust side circulation water channel, the processor adjusts the throttle valve at the outlet of the exhaust side circulation water channel until the two temperatures are equal, and then restores the throttle valve at the outlet of the exhaust side circulation water channel to the preset initial flow rate.

[0021] Compared with the prior art, the diesel engine cylinder liner water cooling system and its control method of the present invention have the following beneficial effects:

[0022] (1) The spiral cooling water path is formed by the spiral matrix and the spiral water cavity, which prevents the uneven distribution of cooling water flow caused by uneven pressure distribution, avoids the problem of incomplete cooling of the local water jacket, and improves the cooling uniformity and efficiency;

[0023] (2) The first liquid accumulation cavity and the second liquid accumulation cavity are provided, which is beneficial to the pressure distribution and flow distribution of the cooling water when flowing in the spiral cooling water path, ensures that the cooling water can fully flow through the cylinder wall, and improves the cooling effect;

[0024] (3) The diameter of the intake side circulation water channel is smaller than that of the exhaust side circulation water channel. Therefore, the pipeline resistance of the intake circulation water channel is large and the flow rate is relatively small, which balances the difference that the temperature end of the exhaust duct is higher than the intake temperature end, and realizes the precise cooling of the cylinder head;

[0025] (4) When the cooling water flows in the spiral cooling water path, it can fully dissipate heat, avoiding the problem of warm coolant flowing through the diesel cylinder again, and greatly improving the heat dissipation effect;

[0026] (5) The structural design of the spiral cooling water path is compact, without additional cooling water pipes, reducing dirt accumulation and facilitating subsequent cleaning and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0028] Figure 1 is a schematic structural diagram of the diesel engine cylinder liner water cooling system described in the embodiment of the present invention;

[0029] Figure 2Top view of the diesel engine cylinder liner water cooling system according to the embodiment of the present invention;

[0030] Figure 3 Cross-sectional view of the engine body according to the embodiment of the present invention;

[0031] Figure 4 Schematic diagram of the exhaust side circulation water channel of the diesel engine cylinder liner water cooling system according to the embodiment of the present invention;

[0032] Figure 5 Schematic diagram of the intake side circulation water channel of the diesel engine cylinder liner water cooling system according to the embodiment of the present invention.

[0033] Explanation of reference numerals:

[0034] 1. Engine body; 2. Cylinder head body; 3. Outer wall of cylinder liner; 4. Water outlet; 5. Water inlet; 6. First liquid accumulation cavity; 7. Second liquid accumulation cavity; 9. Spiral matrix; 10. Intake side circulation water channel; 11. Intake side connecting water channel; 12. Exhaust side circulation water channel; 13. Exhaust side connecting water channel; 14. Spiral water cavity; 15. Exhaust passage; 16. Guide water channel; 17. Intake passage; 18. Inner wall of engine; 19. Mounting hole. Detailed implementation manners

[0035] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0037] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0038] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0039] As Figures 1 to 5 shown, a diesel engine cylinder liner water cooling system and its control method are specifically implemented as follows:

[0040] Embodiment 1:

[0041] As Figure 1 shown, a diesel engine cylinder liner water cooling system includes a first liquid accumulation cavity 6, a spiral base 9, a spiral water cavity 14, a second liquid accumulation cavity 7, an intake side connection water channel 11, an intake side circulation water channel 10, an exhaust side connection water channel 13, an exhaust side circulation water channel 12, a guiding water channel 16, and a water outlet 4. Each component is located in a body main body 1 and a cylinder head main body 2 respectively. The cylinder head main body 2 refers to the material main body, the remaining metal after removing the cooling flow channel and the intake and exhaust channels, and the same applies to the body main body 1.

[0042] Among them, the water outlet 4 is located at the top of the cylinder head main body 2, and it is respectively connected to the intake side circulation water channel 10 and the exhaust side circulation water channel 12 through the guiding water channel 16. The intake side connection water channel 11, the intake side circulation water channel 10, the exhaust side connection water channel 13, the exhaust side circulation water channel 12, the guiding water channel 16, and the exhaust channel are all located inside the cylinder head main body 2. The first liquid accumulation cavity 6, the second liquid accumulation cavity 7, the spiral water cavity, and the water inlet 5 are all located in the body main body 1. The first liquid accumulation cavity 6 is located at the bottom of the outer wall 3 of the cylinder liner, and the second liquid accumulation cavity 7 is located at the top of the outer wall of the cylinder liner.

[0043] As Figure 2 and Figure 3 shown, eight spiral bases 9 are arranged in the circular cylinder between the outer wall 3 of the cylinder liner and the inner wall 18 of the body in the body main body 1. The spiral base 9 is a partition with a spiral curve, the width of the partition is the distance between the outer wall 3 of the cylinder liner and the inner wall 18 of the body, and the partition extends spirally from the upper surface of the first liquid accumulation cavity 6 along the cylindrical ring to the lower surface of the second liquid accumulation cavity 7.

[0044] The spiral curvatures of each of the spiral bases 9 are the same.

[0045] Eight spiral bases 9 are spirally wound between the outer wall 3 of the cylinder liner and the inner wall 18 of the engine body along the cylindrical ring space, thereby dividing the space between the outer wall 3 of the cylinder liner and the inner wall 18 of the engine body into eight non-connected spiral water chambers 14 with equal volumes. The spiral water chambers 14 are used to cool the outer wall 3 of the cylinder liner.

[0046] The spiral water chamber 14 of this embodiment is not a straight up flow channel but a spirally ascending flow channel, and it surrounds the cylindrical ring space for one week, that is, the bottom of the spiral water chamber 14 at the first liquid accumulation chamber 6 and the top of the spiral water chamber 14 at the second liquid accumulation chamber 7 are on the same axis.

[0047] For the spiral base 9, when viewed along the axial direction of the cylinder wall, the angle between two spiral bases 9 forming the same spiral water chamber 14 is 45°, so that the formed spiral flow channel climbs in an S shape, and the flow channel height is the distance between the combustion chamber wall and the inner wall of the cylinder body. Setting the spiral water chamber 14 can prevent uneven cooling water flow caused by uneven pressure distribution and avoid insufficient cooling of the local water jacket.

[0048] Figure 2 The mounting hole 19 in it is a threaded hole for mounting the cylinder head. In addition, since the present invention does not involve structures such as oil circuits, they are not shown in the figure.

[0049] One end of the water inlet 5 is connected to the water pump and the liquid storage tank in sequence through a pipeline. The liquid storage tank contains cooling water, and the water pump is used to provide pressure for the cooling water; the other end of the water inlet 5 is connected to the first liquid accumulation chamber 6 for flowing in cooling water. The outlets of the first liquid accumulation chamber 6 are respectively connected to one end of the spiral water chambers 14, and the other ends of the spiral water chambers 14 are connected to the liquid inlet at the bottom of the second liquid accumulation chamber 7. Moreover, the second liquid accumulation chamber 7 and the first liquid accumulation chamber 6 are arranged in parallel within the outer wall 3 of the cylinder liner.

[0050] The liquid outlets at the top of the second liquid accumulation chamber 7 are respectively connected to one end of the intake side connection water channel 11 and the exhaust side connection water channel 13. The other ends of the intake side connection water channel 11 and the exhaust side connection water channel 13 are respectively connected to the intake side circulation water channel 10 and the exhaust side circulation water channel 12. The other ends of the intake side circulation water channel 10 and the exhaust side circulation water channel 12 are both connected to the guiding water channel 16, and the end of the guiding water channel is connected to the water outlet 4 to take away the heat of the cylinder head. The intake side circulation water channel 10 and the exhaust side circulation water channel 12 are arranged along the intakes 17 and exhausts 15 ( Figure 1 shown by the dotted lines in the figure), so that the cooling water is reasonably arranged from the bottom to the top of the air passage to take away as much heat of the cylinder head as possible.

[0051] There are multiple liquid outlets at the top of the first liquid accumulation cavity. The number of the liquid outlets is the same as that of the spiral water cavities 14, and one liquid outlet is arranged at the connection of the bottom of each spiral water cavity 14 and the first liquid accumulation cavity. The outline of the liquid outlet is smaller than the outline of the bottom of the spiral water cavity.

[0052] Similarly, there are multiple liquid inlets at the bottom of the second liquid accumulation cavity. The number of the liquid inlets is the same as that of the spiral water cavities 14, and one liquid inlet is arranged at the connection of the top of each spiral water cavity 14 and the second liquid accumulation cavity. The outline of the liquid inlet is smaller than the outline of the top of the spiral water cavity.

[0053] As Figure 4 , Figure 5 shown, the intake side bypass water channel 10 and the exhaust side bypass water channel 12 are S-shaped spiral flow paths, which are spirally arranged along the pipe walls of the intake channel 17 and the exhaust channel 15 respectively. Moreover, the average diameter of the pipeline of the exhaust side bypass water channel 12 is larger than that of the intake side bypass water channel 10. Therefore, the pipeline resistance of the intake side bypass water channel 10 is large and the flow rate is smaller than that of the exhaust side bypass water channel, so as to balance the temperature at the exhaust channel end being higher than the intake temperature end and achieve precise cooling.

[0054] During use, the cooling water from the water pump flows into the first liquid accumulation cavity 6 from the water inlet 5. Under the action of the water pressure, the cooling water flows upward along the multiple spiral-shaped spiral water cavities 14 to flow through the outer wall 3 of the cylinder liner so as to cool the outer wall 3 of the cylinder liner, and then flows into the second liquid accumulation cavity 7; the cooling water in the second liquid accumulation cavity 7 enters the cylinder head body 2 through the intake side bypass connection water channel 11 and the exhaust side bypass connection water channel 13 respectively, and then flows through the intake side bypass water channel 10 and the exhaust side bypass water channel 12 located in the cylinder head body 2 respectively to cool the intake channel 17 and the exhaust channel 15 in two paths, and then through the guiding water channel 16, the two paths of cooling water are merged into one path and then flow out from the water outlet 4 at the rear end of the cylinder head.

[0055] At this time, the intake side bypass water channel 10 flows through the periphery of the intake side valve guide pipe and enters the guiding water channel 16 1 cm below the intake manifold installation surface;

[0056] The exhaust side bypass water channel 12 flows through the periphery of the exhaust side valve guide pipe and above the integrated exhaust manifold, and enters the guiding water channel 16 at a position close to but 1 cm below the top surface of the cylinder head, and converges with the cooling water from the intake side bypass water channel 10 and then flows out from the water outlet at the cylinder head.

[0057] Embodiment 2:

[0058] A diesel engine cylinder liner water cooling system includes a first liquid accumulation cavity 6, a spiral matrix 9, a spiral water cavity 14, a second liquid accumulation cavity 7, an intake side connection water channel 11, an intake side circulation water channel 10, an exhaust side connection water channel 13, an exhaust side circulation water channel 12, a guiding water channel 16 and a water outlet 4. The water cooling system is basically similar to that of the first embodiment, and the same content will not be elaborated here. Only the differences will be described below.

[0059] The spacing between two spiral matrices 9 forming the same spiral water cavity 14 is unequal. The spacing in the area near the exhaust port is greater than that in the area near the intake port, so as to enhance the contact area between the outer wall of the middle part of the combustion chamber near the exhaust port and the cooling water under the condition of high-intensity operation of the diesel engine, which is more conducive to heat dissipation.

[0060] Temperature sensors are provided at the first liquid accumulation cavity 6, the second liquid accumulation cavity 7, the outlet of the intake side circulation water channel 10, the outlet of the exhaust side circulation water channel 12, and the water outlet 4 for monitoring the temperature at this position; the temperature sensors are respectively connected to the processor through wires;

[0061] Moreover, throttle valves are provided at the outlet of the intake side circulation water channel 10 and the outlet of the exhaust side circulation water channel 12 to reduce the flow rate of the cooling water by throttling; and the throttle valves are respectively connected to the processor through wires.

[0062] When the temperature at the outlet of the intake side circulation water channel 10 is higher than the temperature at the outlet of the exhaust side circulation water channel, adjust the throttle valve at the outlet of the intake side circulation water channel to increase the flow rate of the cooling water at the outlet of the intake side circulation water channel to achieve precise cooling; until the temperature at the outlet of the intake side circulation water channel 10 is equal to the temperature at the outlet of the exhaust side circulation water channel 12, restore the throttle valve at the outlet of the intake side circulation water channel to the preset initial flow rate;

[0063] Similarly, when the temperature at the outlet of the intake side circulation water channel 10 is lower than the temperature at the outlet of the exhaust side circulation water channel 12, adjust the throttle valve at the outlet of the exhaust side circulation water channel 12 to increase the coolant flow rate of the exhaust side circulation water channel 12; until the temperature at the outlet of the intake side circulation water channel 10 is equal to the temperature at the outlet of the exhaust side circulation water channel 12, restore the throttle valve at the outlet of the exhaust side circulation water channel to the preset initial flow rate.

[0064] The advantages and beneficial effects of the present invention are as follows:

[0065] (1) A spiral cooling water path is formed by using a spiral matrix and a spiral water cavity, which prevents uneven cooling water flow caused by uneven pressure distribution, avoids the problem of incomplete cooling of the local water jacket, and improves the cooling uniformity and efficiency;

[0066] (2) The setting of the first liquid accumulation cavity and the second liquid accumulation cavity is beneficial to the pressure distribution and flow rate distribution when the cooling water flows in the spiral cooling water path, ensuring that the cooling water can fully flow through the cylinder wall and improving the cooling effect;

[0067] (3) The diameter of the intake side circulation water channel is smaller than that of the exhaust side circulation water channel. As a result, the pipeline resistance of the intake circulation water channel is large and the flow rate is relatively small, balancing the difference that the temperature end of the exhaust passage is higher than the intake temperature end and achieving precise cooling of the cylinder head;

[0068] (4) When the cooling water flows in the spiral cooling water path, it can fully dissipate heat, avoiding the problem of warm coolant flowing through the diesel cylinder again and greatly improving the heat dissipation effect;

[0069] (5) The structural design of the spiral cooling water path is compact, without the need for additional cooling water pipes, reducing dirt accumulation and facilitating subsequent cleaning and maintenance.

[0070] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A diesel engine cylinder liner water cooling system, characterized in that: It includes a cylinder liner cooling component, a cylinder head cooling component, a temperature sensor, a throttle valve, and a processor; The cylinder liner cooling component is installed inside the engine block body (1), and includes a first liquid accumulation cavity (6), a spiral water cavity (14), and a second liquid accumulation cavity (7). A circular cylindrical space is formed between the outer wall (3) of the cylinder liner and the inner wall (18) of the engine block inside the engine block body (1), and the circular cylindrical space is divided by 8 spiral bases (9) into 8 spiral water cavities (14). The bottom end of the spiral water cavity (14) is communicated with the liquid outlet of the first liquid accumulation cavity (6), and the top end is communicated with the liquid inlet of the second liquid accumulation cavity (7); The cylinder head cooling component is installed inside the cylinder head body (2), and includes an intake side circulation water channel (10) and an exhaust side circulation water channel (12). An intake side connection water channel (11), an exhaust side connection water channel (13), a guiding water channel (16), an intake passage (17), and an exhaust passage (15) are also installed inside the cylinder head body (2). Both the intake side connection water channel (11) and the exhaust side connection water channel (13) are communicated with the second liquid accumulation cavity (7). The liquid inlet of the intake side circulation water channel (10) is communicated with the intake side connection water channel (11), the liquid inlet of the exhaust side circulation water channel (12) is communicated with the exhaust side connection water channel (13), and the liquid outlets of the intake side circulation water channel (10) and the exhaust side circulation water channel (12) are both communicated with the guiding water channel (16); The cylinder head body (2) is located above the engine block body (1), and mounting holes (19) are provided around the cylinder head body (2); The temperature sensor is installed at the outlets of the first liquid accumulation cavity (6), the second liquid accumulation cavity (7), the intake side circulation water channel (10), the exhaust side circulation water channel (12), and the water outlet. The throttle valve is installed at the outlets of the intake side circulation water channel (10) and the exhaust side circulation water channel (12). The processor is respectively connected to the temperature sensor and the throttle valve.

2. The water-cooling system for a diesel engine cylinder liner according to claim 1, wherein: The spiral water cavity (14) is a spiral rising flow channel, and at least surrounds three-quarters of the circular cylindrical space. The spiral water cavities (14) are not communicated with each other.

3. The water-cooling system for a diesel engine cylinder liner according to claim 2, wherein: The intake side circulation water channel (10) and the exhaust side circulation water channel (12) are respectively arranged in an S-shaped spiral around the pipe walls of the intake passage (17) and the exhaust passage (15).

4. A diesel engine cylinder liner water cooling system according to claim 3, characterized in that: The average diameter of the pipeline of the exhaust side circulation water channel (12) is larger than that of the intake side circulation water channel (10).

5. The water-cooling system for a diesel engine cylinder liner according to claim 4, characterized in that: A water outlet (4) is installed at the top of the cylinder head body (2), and a water inlet is installed at the bottom of the engine block body (1). The water outlet (4) is communicated with the guiding water channel (16), and the water inlet is communicated with the liquid inlet of the first liquid accumulation cavity (6).

6. The water-cooling system for a diesel engine cylinder liner according to claim 5, characterized in that: The spiral base (9) is a partition in the shape of a spiral curve, and its width is equal to the distance between the outer wall (3) of the cylinder liner and the inner wall (18) of the engine block. The bottom end of the spiral base (9) is connected to the upper surface of the first liquid accumulation cavity (6), and the top end is connected to the lower surface of the second liquid accumulation cavity (7).

7. The water-cooling system for a diesel engine cylinder liner according to claim 6, wherein: The curvature of each spiral base (9) is equal, and the volume of each spiral water cavity (14) is equal.

8. The water-cooling system for a diesel engine cylinder liner according to claim 7, characterized in that: The spacing between the two spiral bases (9) forming the spiral water chamber (14) is related to the area where the spiral water chamber (14) is located, and the spacing in the area close to the exhaust port is greater than that in the area close to the intake port.

9. A control method for a water-cooling system of a diesel engine cylinder liner, based on the water-cooling system of a diesel engine cylinder liner described in claims 1-8, characterized in that: The method includes the following steps: S1. If the outlet temperature of the intake side circulation water channel (10) is greater than the outlet temperature of the exhaust side circulation water channel (12), the processor adjusts the throttle valve at the outlet of the intake side circulation water channel (10) until the temperatures of the two are equal, and then restores the throttle valve at the outlet of the intake side circulation water channel (10) to the preset initial flow rate; S2. If the outlet temperature of the intake side circulation water channel (10) is less than the outlet temperature of the exhaust side circulation water channel (12), the processor adjusts the throttle valve at the outlet of the exhaust side circulation water channel (12) until the temperatures of the two are equal, and then restores the throttle valve at the outlet of the exhaust side circulation water channel (12) to the preset initial flow rate.

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