CN111878217A - Cooling system, device and equipment for internal combustion engine using memory alloy to enhance heat transfer - Google Patents

Abstract

The invention discloses a cooling system, device and equipment for an internal combustion engine which utilizes memory alloys to enhance heat transfer. The cooling system of the internal combustion engine includes: a tube-and-belt heat exchanger in a radiator and a cooling channel of a cylinder; memory alloy patches are arranged on the inner wall of the cooling tube of the tube-and-belt heat exchanger and/or the inner wall of the cooling channel The memory alloy patch includes a base and at least one disturbance fin on the base; the disturbance fin can be deformed correspondingly within a preset temperature range to change the angle between the disturbance fin and the base . By realizing that the angle between the disturbance fin and the base is adjusted with the temperature, the cooling liquid flowing through the tube-and-belt heat exchanger and/or the cooling channel is disturbed, so that the heat dissipation capacity of the cooling system of the internal combustion engine changes adaptively with the change of temperature , comprehensively measure the enhanced heat dissipation and energy loss, meet the heat dissipation demand of the internal combustion engine under high temperature conditions, and at the same time reduce the additional energy loss caused by the enhanced heat dissipation capacity to a reasonable level.

Description

Cooling system, device and equipment for internal combustion engine using memory alloy to enhance heat transfer

technical field

The invention relates to a cooling system, device and equipment for an internal combustion engine which utilizes memory alloys to enhance heat transfer.

Background technique

Internal combustion engine (Engine) is an energy conversion device, which is the power source of vehicles, ships and other means of transportation. Since the internal combustion engine will generate a lot of heat when it is working, if the working temperature of the internal combustion engine is too high, it will cause the high temperature expansion of the internal combustion engine parts and affect the normal fitting clearance, causing serious consequences such as blocking the movement of the moving parts or even getting stuck. Therefore, in order to prevent the working temperature of the internal combustion engine from being too high. It is necessary to configure a cooling system for the internal combustion engine to keep the operating temperature of the internal combustion engine within an appropriate range.

When the internal combustion engine starts to work, the valve of the thermostat of the internal combustion engine is in a closed state at this time, and the liquid supply pump supplies the coolant into the cooling channel of the cylinder, and the coolant circulates between the liquid supply pump and the cooling channel to absorb a small amount of the internal combustion engine. Heat, the purpose is to prevent the internal combustion engine from being too low to start difficult; when the internal combustion engine works normally, the coolant temperature exceeds the preset temperature, the valve of the thermostat is opened at this time, and the coolant enters the radiator after absorbing heat in the cooling passage of the cylinder The cooling pipe of the tube-and-belt heat exchanger, the air generated by the fan in the radiator exchanges heat with the cooling liquid after absorbing heat in the cooling pipe, and the heat is finally dissipated to the external environment to realize the cooling of the internal combustion engine. However, when the internal combustion engine works under extreme working conditions, when the operating temperature of the internal combustion engine is higher than a certain value, the valve of the thermostat is fully opened, and the cooling intensity of the internal combustion engine reaches the maximum, and the temperature of the coolant after heat dissipation by the radiator is still very high. , the expected cooling effect of the internal combustion engine cannot be achieved. Therefore, how to further improve the cooling intensity of the internal combustion engine, promote the rapid discharge of the heat generated in the internal combustion engine, and prevent the working temperature of the internal combustion engine from being too high is an urgent technical problem to be solved.

SUMMARY OF THE INVENTION

In view of the above technical defects and technical drawbacks in the prior art, the embodiments of the present invention provide a cooling system, device and equipment for an internal combustion engine using memory alloys to enhance heat transfer to overcome or at least partially solve the above problems.

As an aspect of the embodiments of the present invention, it relates to a cooling system for an internal combustion engine using memory alloys to enhance heat transfer, comprising: a tube-and-belt heat exchanger of a radiator and a cooling channel of a cylinder;

Memory alloy patches are arranged on the inner wall of the cooling tube of the tube-and-belt heat exchanger and/or the inner wall of the cylinder cooling channel;

The memory alloy patch includes a base and at least one disturbance fin on the base; the disturbance fin can be deformed correspondingly within a preset temperature range to change the included angle between the disturbance fin and the base.

In one embodiment, the opening direction of the angle between the at least one disturbance fin and the base is opposite to the flow direction of the cooling liquid in the cooling pipe and the cylinder cooling channel.

In one embodiment, the minimum value of the included angle between the at least one disturbance fin and the base is 0°, and the maximum value of the included angle between the at least one disturbance fin and the base is 30° °～45°.

In one embodiment, the at least one disturbance fin is integrally formed with the base.

In one embodiment, the cooling system for an internal combustion engine using memory alloys to enhance heat transfer further comprises: a thermostat;

The opening degree of the valve of the thermostat increases as the temperature of the cooling liquid flowing through the thermostat increases, and the minimum temperature of the preset temperature range is greater than or equal to the minimum opening degree of the valve of the thermostat. temperature of the coolant.

In one embodiment, the heat sink includes a tube-and-belt heat exchanger and a fan;

The tube-and-belt heat exchanger includes a cooling tube and a heat dissipation strip, and the memory alloy patch is attached to the inner wall of the cooling tube; the cross-sectional shape of the base of the memory alloy patch is a rectangle.

In one embodiment, the cylinder includes a cylinder liner, a cylinder body, and a cooling passage formed between the cylinder liner and the cylinder body;

The memory alloy patch is attached to the inner wall of the cooling channel, and the cross-sectional shape of the memory alloy patch is arc.

As an aspect of the embodiments of the present invention, it relates to a radiator, including a tube-and-belt heat exchanger;

The inner wall of the cooling tube of the tube-band heat exchanger is provided with a memory alloy patch;

The memory alloy patch includes a base and at least one perturbation fin on the base; the perturbation fin can be deformed correspondingly within a preset temperature range to change the clamping between the perturbation fin and the base horn.

As an aspect of the embodiments of the present invention, it relates to a cylinder of an internal combustion engine, comprising: a cooling channel;

The inner wall of the cooling channel is provided with a memory alloy patch;

The memory alloy patch includes a base and at least one perturbation fin on the base; the perturbation fin can be deformed correspondingly within a preset temperature range to change the clamping between the perturbation fin and the base horn.

As an aspect of the embodiments of the present invention, it relates to an internal combustion engine, including the above-mentioned cooling system for the internal combustion engine using memory alloys to enhance heat transfer.

The embodiments of the present invention achieve at least the following technical effects:

The embodiment of the present invention is a cooling system, device and equipment for an internal combustion engine that utilizes memory alloys to enhance heat transfer. In the cooling system of the internal combustion engine, memory alloy patches are arranged on the inner wall of the cooling pipe of the tube-and-belt heat exchanger, and memory alloy patches are arranged on the inner wall of the cooling channel. Provided with memory alloy patches. When the preset temperature range is not reached, the memory alloy patch is in the initial state and will not affect the pressure of the cooling liquid flowing through the cooling pipe of the tube-and-belt heat exchanger and the cooling channel of the cylinder, thus avoiding energy loss. ; When the temperature reaches the preset temperature range, the perturbation fins deform adaptively according to the temperature of the coolant: as the temperature of the coolant gradually increases, the angle between the perturbation fins and the base gradually increases, and the convection flows through The degree of disturbance of the cooling liquid in the cooling pipe and the cooling channel gradually increases, so that the heat transfer coefficient between the cooling liquid in the cooling channel and the internal combustion engine and between the cooling liquid in the cooling pipe and the external cooling air gradually increases, and the heat dissipation efficiency increases. ; When the coolant temperature gradually decreases, the shape of the perturbation fins gradually recovers, the angle between the perturbation fins and the base gradually decreases, and the degree of perturbation to the coolant decreases, thereby reducing the flow time of the coolant caused by the perturbation. Pressure loss, reducing unnecessary energy loss. The angle between the perturbation fin and the base is adjusted with the temperature, so that the heat dissipation capacity of the cooling system of the internal combustion engine changes adaptively with the temperature, thereby reasonably adjusting the cooling intensity of the internal combustion engine. On the one hand, the heat generated by the internal combustion engine when the working temperature is high is quickly discharged, which improves the heat dissipation effect of the internal combustion engine; The additional energy loss caused by enhanced heat dissipation avoids unnecessary energy waste.

Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the present invention may be realized and attained by the structure described in the written description, claims, and drawings.

The technical solutions of the present invention will be further described in detail below through the accompanying drawings and embodiments.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention. In the attached image:

1 is a schematic diagram of the structure and working principle of a cooling system for an internal combustion engine provided by an embodiment of the present invention;

2A is a schematic three-dimensional structure diagram of a tube-and-belt heat exchanger provided by an embodiment of the present invention;

2B is a schematic front view of the structure of the tube-and-belt heat exchanger provided by the embodiment of the present invention;

2C is a schematic top view of the structure of the tube-and-belt heat exchanger provided by the embodiment of the present invention;

3A is a schematic cross-sectional structural diagram of a cooling tube of a tube-and-belt heat exchanger provided by an embodiment of the present invention;

3B is an enlarged schematic view of a partial structure of part A of the cooling pipe of FIG. 3A;

4A is a schematic structural diagram of a memory alloy patch provided by an embodiment of the present invention;

FIG. 4B is a schematic cross-sectional view of the memory alloy patch shown in FIG. 4A along the A-A direction;

4C is a schematic top view of the structure of the memory alloy patch shown in FIG. 4A;

5A is a schematic cross-sectional structural diagram of a cylinder provided by an embodiment of the present invention;

FIG. 5B is an enlarged schematic view of a partial structure of part B of the cylinder of FIG. 5A;

6A is a schematic structural diagram of another memory alloy patch provided by an embodiment of the present invention;

FIG. 6B is a schematic cross-sectional view of the memory alloy patch shown in FIG. 6A along the A-A direction;

6C is a schematic top view of the structure of the memory alloy patch shown in FIG. 6A;

FIG. 7 is a schematic diagram of the memory alloy patch and the relationship between the memory alloy patch and the cooling liquid flow direction and temperature change provided by an embodiment of the present invention.

Detailed ways

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

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with some aspects of the invention as recited in the appended claims.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

Example 1:

Embodiment 1 of the present invention provides a cooling system for an internal combustion engine that utilizes memory alloys to enhance heat transfer. Referring to FIGS. 1-7 , the cooling system for the internal combustion engine includes: a radiator 1, a cylinder 2, a thermostat 3 and a liquid supply Pump 4; wherein, the radiator 1 includes a tube-and-belt heat exchanger 11, and the cylinder 2 includes a cooling channel 21;

Memory alloy patches 101 are provided on the inner wall of the cooling tube 111 of the tube-and-belt heat exchanger 11 and/or the inner wall of the cooling channel 21;

The memory alloy patch 101 includes a base 1011 and at least one disturbance fin 1012 on the base; the disturbance fin 1012 can be deformed correspondingly within a preset temperature range, changing the disturbance fin 1012 and the base 1011 the angle between.

An embodiment of the present invention is a cooling system for an internal combustion engine that utilizes memory alloys to enhance heat transfer. In the cooling system of the internal combustion engine, memory alloy patches are arranged on the inner wall of the cooling tube of the tube-and-belt heat exchanger, and memory alloys are arranged on the inner wall of the cooling channel. patch. When the preset temperature range is not reached, the memory alloy patch is in the initial state and will not affect the pressure drop of the cooling liquid flowing through the cooling pipe of the tube-and-belt heat exchanger and the cooling channel of the cylinder, avoiding energy loss; when the temperature reaches the preset temperature range, the perturbation fins deform adaptively according to the temperature of the coolant: as the temperature of the coolant gradually increases, the angle between the perturbation fins and the base gradually increases, and the convection The degree of disturbance of the cooling liquid in the cooling pipe and the cooling passage gradually increases, so that the heat transfer coefficient between the cooling liquid in the cooling passage and the internal combustion engine and between the cooling liquid in the cooling pipe and the external cooling air gradually increases, and the heat dissipation efficiency increases. When the temperature of the cooling liquid gradually decreases, the shape of the disturbance fin gradually recovers, the angle between the disturbance fin and the base gradually decreases, and the degree of disturbance to the cooling liquid decreases continuously, thereby reducing the flow of the cooling liquid caused by the disturbance. Time pressure loss, reduce unnecessary energy loss. The angle between the perturbation fin and the base is adjusted with the temperature, so that the heat dissipation capacity of the cooling system of the internal combustion engine changes adaptively with the temperature, thereby reasonably adjusting the cooling intensity of the internal combustion engine. On the one hand, the heat generated by the internal combustion engine when the working temperature is high is quickly discharged, which improves the heat dissipation effect of the internal combustion engine; The additional energy loss caused by enhanced heat dissipation avoids unnecessary energy waste.

When dissipating heat from an internal combustion engine, how to enhance heat transfer is an important issue in heat transfer control. The inventor of the present invention found in experiments that since the heat dissipation process of the cooling system of an internal combustion engine belongs to convective heat transfer without phase change, the use of memory The memory alloy patch prepared from the alloy can effectively increase the disturbance of the cooling liquid by increasing the angle between the perturbation rib of the memory alloy patch and the substrate, cut off the development of the thermal boundary layer, and reduce the thickness of the thermal boundary layer. The thickness of , and then increase the heat transfer coefficient to achieve the purpose of strengthening heat transfer. Therefore, an embodiment of the present invention proposes a cooling system for an internal combustion engine that utilizes memory alloys to enhance heat transfer. Memory alloy patches are provided on the inner walls of the cooling tubes of the tube-and-belt heat exchanger in the radiator of the cooling system of the internal combustion engine. The inner wall of the cooling passage of the cylinder is provided with a memory alloy patch, which can effectively strengthen the heat dissipation capability of the internal combustion engine and improve the working performance of the internal combustion engine under high temperature conditions.

In a specific embodiment, the radiator is an important part of the cooling system of the internal combustion engine, and the radiator is composed of a tube-and-belt heat exchanger, a fan, an upper water chamber, a lower water chamber, and the like. Among them, the tube-and-belt heat exchanger is the core part of the radiator and plays a major role in heat dissipation. Referring to FIGS. 1 and 2A to 2C, the radiator 1 of the cooling system of the internal combustion engine includes a tube-and-belt heat exchanger 11 and a fan 12, wherein the tube-and-belt heat exchanger 11 includes a cooling pipe 111 and a heat dissipation belt 112, wherein , the heat dissipation belt 112 can adopt a louver structure. Referring to FIGS. 3A and 3B , memory alloy patches 101 are attached to the inner walls of the cooling tubes 111 of the tube-and-belt heat exchanger 11 . Referring to FIG. 6A to FIG. 6C , the cross-sectional shape of the memory alloy patch is rectangular, so it can be arranged on the inner wall of the cooling pipe. In the embodiment of the present invention, the connection method between the memory alloy patch 101 and the cooling pipe 111 includes but is not limited to fixed connection methods such as bonding and welding. As long as the memory alloy patch can be attached to the inner wall of the cooling pipe 111, the present invention In the embodiment, this may not be specifically limited.

In a specific embodiment, as shown in FIGS. 5A and 5B , the cylinder 2 of the internal combustion engine includes a cylinder liner 22 , a cylinder body 23 , and a cooling channel 21 formed between the cylinder liner 22 and the cylinder body 23 , the cooling channel 21 A memory alloy patch 101 is attached to the inner wall. Referring to FIGS. 6A to 6C , the cross-sectional shape of the memory alloy patch substrate is arc-shaped, and therefore, it can be arranged on the inner wall of the cooling duct of the cylinder of the internal combustion engine. In the embodiment of the present invention, the connection method between the memory alloy patch 101 and the cooling channel 21 includes but is not limited to fixed connection methods such as bonding and welding. As long as the memory alloy patch can be attached to the inner wall of the cooling channel 21, the present invention In the embodiment, this may not be specifically limited.

In one embodiment, as shown in FIG. 7 , the opening direction of the included angle between at least one disturbance fin 1012 of the memory alloy patch 101 and the base 1011 and the flow direction of the cooling liquid in the cooling pipe and the cooling channel on the contrary. The opening direction of the angle between the perturbation fin and the base is opposite to the flow direction of the cooling liquid in the cooling pipe and the cooling channel, so that the perturbation effect of the perturbation fin on the cooling liquid flowing through the cooling pipe and the cooling channel is better. Improve the heat exchange efficiency of the coolant. And it can be seen from FIG. 7 that the angle between the disturbance fins 1012 and the base 1011 varies with temperature, and it may be that the angle between the disturbance fins and the base increases as the temperature increases.

In a specific embodiment, the minimum value of the included angle between the at least one disturbance fin and the base is 0°, and the maximum value of the included angle between the at least one disturbance fin and the base is in the range of 30°～45°. In the embodiment of the present invention, the maximum value of the included angle between the disturbance fins and the base may be between 30° and 45°, because if the included angle is too small, when the temperature of the cooling liquid rises too fast, the disturbance fins will The degree of disturbance of the coolant is too small, and the heat exchange efficiency of the coolant is too low, which still cannot meet the heat dissipation requirements of the internal combustion engine. The pressure loss increases, resulting in unnecessary energy loss. The inventor of the present invention has obtained through experiments that when the maximum value of the included angle is between 30° and 45°, it can not only avoid excessive energy loss, but also make the disturbance degree of the perturbation fins to the cooling liquid to meet the heat exchange requirements. , to ensure the cooling effect of the internal combustion engine.

In one embodiment, referring to FIGS. 4A to 4C and FIGS. 6A to 6C , in the embodiment of the present invention, at least one disturbance fin 1012 of the memory alloy patch is uniformly distributed on the substrate 1011 . In the embodiment of the present invention, the number and arrangement of the perturbation fins of the memory alloy patch can be selected according to actual requirements, which are not specifically limited herein.

In one embodiment, referring to FIGS. 4A to 4C and FIGS. 6A to 6C , the cross section of the perturbation fin 1012 of the memory alloy patch is rectangular, and the use of the perturbation rib with a rectangular cross section can avoid excessive The large energy loss can make the disturbance degree of the perturbation fins to the cooling liquid to meet the heat exchange requirements and ensure the heat dissipation effect on the internal combustion engine. Of course, the cross-section of the perturbation fins can also be rhombus, ellipse, circle or triangle. The shape of the cross-section of the perturbation fins can be selected according to actual needs, which is not specifically limited in the embodiment of the present invention.

In a specific embodiment, the memory alloy patches are all made of memory alloys. Referring to FIGS. 4A to 4C and FIGS. 6A to 6C , at least one disturbance fin 1012 of the memory alloy patch is integrally formed with the base 1011 . . In the embodiment of the present invention, the memory alloy patch obtained by integrally forming the perturbation rib with the base can perform memory training more conveniently, so that the perturbation rib of the memory alloy patch can be sensitively deformed with temperature changes.

The memory alloy for preparing the memory alloy patch of the present invention may adopt a low-temperature shape memory alloy, including Cu-based memory alloy and Ni-based memory alloy, such as Cu-Zn-Al, Cu-Ni-Al, and the like. In the embodiment of the present invention, memory training is performed on the memory alloy patch, so that the perturbation fins on the memory alloy patch can realize the deformation required by the present invention. The training of the memory alloy patch may adopt training methods such as stress application and heat treatment, and the specific execution training method may adopt the method in the prior art, which will not be repeated in the embodiment of the present invention.

In the embodiment of the present invention, when cooling the internal combustion engine, when the cooling liquid flows in the cooling passage, the cooling liquid absorbs the heat generated by the operation of the internal combustion engine, the cooling liquid after absorbing the heat flows into the cooling pipe, and the fan of the radiator blows the external air into the pipe The belt heat exchanger makes the heat exchange between the outside air and the cooling liquid after absorbing heat in the cooling pipe, and finally dissipates the heat to the outside environment. Referring to FIG. 3A , since the cooling tubes of the tube-and-belt heat exchanger may be flat tubes, memory alloy patches may be disposed on both sides of the flat tubes. In the embodiment of the present invention, the cooling system of the internal combustion engine further includes a thermostat, and the valve opening degree of the thermostat increases as the temperature of the cooling liquid flowing through the thermostat increases. Based on this, the minimum temperature of the above-mentioned preset temperature range is greater than or equal to the temperature of the cooling liquid when the opening degree of the valve of the thermostat is minimized.

Referring to Figure 1, when the internal combustion engine starts to work, the valve of the thermostat 3 is in a closed state, and the liquid supply pump 4 supplies the low-temperature coolant that does not absorb the engine heat into the cooling passage 21 of the cylinder 2. At this time, the coolant is only It absorbs a small amount of heat generated when the internal combustion engine starts and works, and the temperature of the low-temperature coolant rises very little. At this time, the disturbance fins of the memory alloy patch of the cooling channel 21 do not deform, and the heat transfer coefficient between the coolant and the cylinder remains unchanged, the purpose is to prevent the internal combustion engine from being too low to start difficult; when the internal combustion engine is normal After the operation, the working temperature of the internal combustion engine increases, and the low-temperature coolant flowing through the cooling channel begins to absorb a large amount of heat generated by the normal operation of the internal combustion engine. The high-temperature coolant after absorbing heat, when the temperature of the high-temperature coolant reaches the temperature at which the valve of the thermostat is opened, the valve of the thermostat 3 is opened, so the high-temperature coolant after absorbing heat enters the tube-belt exchange of the radiator 1. Heater 11. By adjusting the opening degree of the valve of the thermostat 3, the flow rate of the high temperature cooling liquid after heat absorption can be adjusted. When the temperature of the endothermic high-temperature coolant rises to the minimum temperature in the preset temperature range, the perturbation fins of the memory alloy patches in the cooling pipe and the perturbation fins of the memory alloy patches in the cooling channel both begin to occur. Deformation, the angle between the perturbation fin and the base increases as the temperature increases, when the temperature of the high-temperature coolant after endothermic rises to the maximum temperature in the preset temperature range, the perturbation fin and the base The included angle between the perturbation fins and the base reaches the maximum value, and when the temperature of the coolant continues to increase, the included angle between the perturbation fins and the base remains at the maximum value. The fan 12 of the radiator 1 blows external air into the tube-strip heat exchanger 11 to cool the heat-absorbing high-temperature cooling liquid flowing through the cooling tubes 111 in the tube-strip heat exchanger 11, and the heat absorbed by the fan air is finally Dissipated into the external environment, the temperature of the high-temperature coolant begins to drop, and gradually returns to low-temperature coolant, and the low-temperature coolant after heat dissipation enters the cooling passage 21 again through the liquid supply pump 4 for circulation, repeating the coolant circulation process to realize the internal combustion engine. of cooling.

In the embodiment of the present invention, as the angle between the perturbation fin and the base increases, the perturbation fin of the memory alloy patch in the cooling channel continuously increases the perturbation of the cooling liquid flowing through the cooling channel, and the cooling liquid The convective heat transfer coefficient with the internal combustion engine increases, the cooling intensity of the cooling liquid in the cooling passage to the internal combustion engine increases, and the heat of the internal combustion engine can be transferred to the cooling liquid in the cooling passage more quickly. As the angle between the perturbation fins and the base increases, the perturbation fins of the memory alloy patches in the cooling pipe continuously increase the perturbation of the cooling liquid flowing through the cooling pipe after absorbing heat. The heat exchange coefficient with the air blown into the outside of the tube-belt heat exchanger by the fan increases, and the cooling intensity of the external air blown into the tube-belt heat exchanger by the fan of the radiator increases the cooling intensity of the cooling liquid after heat absorption in the cooling pipe, The heat from the coolant can be dissipated to the air faster.

Due to the deformation of the disturbance fins of the memory alloy patch, the cooling liquid flowing through the disturbance fins is disturbed, which cuts off the development of the thermal boundary layer of the cooling liquid near the inner wall of the cooling tube when the cooling liquid flows, and reduces the thermal boundary layer. The thickness of the cooling liquid increases, thereby increasing the heat transfer coefficient of the cooling liquid and enhancing the heat exchange efficiency between the cooling liquid and the outside air after heat absorption. Due to the deformation of the perturbation fins of the memory alloy patch, the cooling liquid flowing through the perturbation fins is perturbed, which cuts off the development of the thermal boundary layer of the cooling liquid near the inner wall of the cooling channel when the cooling liquid flows, and thins the thermal boundary. The thickness of the layer increases, thereby increasing the heat transfer coefficient of the coolant and enhancing the heat dissipation efficiency between the coolant and the internal combustion engine.

Within the preset temperature range, the memory alloy patch can adaptively adjust the degree of disturbance to the cooling liquid according to the temperature of the cooling liquid. When the temperature gradually decreases, the deformation degree of the disturbance fins is weakened, so that the cooling liquid flows The pressure loss is reduced to avoid unnecessary energy loss. When the temperature gradually rises, the deformation degree of the perturbing fins increases, so that the enhanced heat transfer ability of the coolant is gradually enhanced. Therefore, the present invention comprehensively measures the two aspects of enhanced heat transfer and energy loss, meets the heat dissipation requirement of the internal combustion engine under high temperature conditions, and at the same time reduces the additional energy loss caused by the enhanced heat transfer capability to a reasonable level.

In a specific embodiment, the cooling liquid may be a common internal combustion engine cooling liquid, such as ethylene glycol-water solution, and the temperature of the cooling liquid when the valve of the thermostat is opened may be between 70° and 80°. Therefore, The minimum value of the preset temperature range may be greater than or equal to 70°. Of course, the minimum value of the preset temperature range may be selected according to actual needs, which is not specifically limited in this embodiment of the present invention.

Embodiment 2:

Based on the same inventive concept, an embodiment of the present invention also provides a radiator, the radiator 1 includes a tube-and-belt heat exchanger 11;

The inner wall of the cooling tube 111 of the tube-and-belt heat exchanger 11 is provided with a memory alloy patch 101;

The memory alloy patch 101 includes a base 1011 and at least one perturbation fin 1012 on the base 1011; the perturbation fin 1012 can be deformed correspondingly within a preset temperature range, changing the relationship between the perturbation fin 1012 and the perturbation fin 1012. The included angle between the substrates 1011.

Embodiment three:

Based on the same inventive concept, an embodiment of the present invention further provides a cylinder of an internal combustion engine, the cylinder 2 comprising: a cooling passage 21;

The inner wall of the cooling channel 21 is provided with a memory alloy patch 101;

The memory alloy patch 101 includes a base 1011 and at least one perturbation fin 1012 on the base 1011; the perturbation fin 1012 can be deformed correspondingly within a preset temperature range, changing the relationship between the perturbation fin 1012 and the perturbation fin 1012. The included angle between the substrates 1011.

Embodiment 4:

Based on the same inventive concept, an embodiment of the present invention further provides an internal combustion engine, including the cooling system for an internal combustion engine that utilizes memory alloys to enhance heat transfer described in the first embodiment.

For the specific implementation manners of the apparatuses and devices described in the foregoing Embodiments 2 to 4, reference may be made to the specific descriptions in the foregoing Embodiment 1, and details are not described herein again.

Other embodiments of the present disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or techniques in the technical field not disclosed by the present disclosure . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise structures described above and illustrated in the accompanying drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A cooling system for an internal combustion engine utilizing memory alloys to enhance heat transfer, characterized in that, comprising: a tube-and-belt heat exchanger of a radiator and a cooling passage of a cylinder; Memory alloy patches are arranged on the inner wall of the cooling tube and/or the inner wall of the cooling channel of the tube-and-belt heat exchanger; The memory alloy patch includes a base and at least one disturbance fin on the base; the disturbance fin can be deformed correspondingly within a preset temperature range to change the included angle between the disturbance fin and the base. 2 . The cooling system of an internal combustion engine according to claim 1 , wherein the opening direction of the angle between the at least one disturbance fin and the base is related to the cooling liquid in the cooling pipe and the cylinder cooling passage. 3 . flow in the opposite direction. 3. The cooling system of an internal combustion engine according to claim 1, wherein the minimum value of the included angle between the at least one disturbance fin and the base is 0°, and the at least one disturbance fin and the base are at least 0°. The maximum value of the included angle between the substrates is in the range of 30° to 45°. 4. The cooling system for an internal combustion engine of claim 1, wherein the at least one disturbance fin is integrally formed with the base. 5. The cooling system of an internal combustion engine according to claim 1, characterized in that, further comprising: a thermostat; The opening degree of the valve of the thermostat increases as the temperature of the cooling liquid flowing through the thermostat increases, and the minimum temperature of the preset temperature range is greater than or equal to the minimum opening degree of the valve of the thermostat. temperature of the coolant. 6. The cooling system for an internal combustion engine according to any one of claims 1-5, wherein the radiator comprises a tube-and-belt heat exchanger and a fan; The tube-and-belt heat exchanger includes a cooling tube and a heat dissipation strip, and the memory alloy patch is attached to the inner wall of the cooling tube; the cross-sectional shape of the base of the memory alloy patch is a rectangle. 7. The cooling system for an internal combustion engine according to any one of claims 1 to 5, wherein the cylinder comprises a cylinder liner, a cylinder body, and a cooling channel formed between the cylinder liner and the cylinder body; The memory alloy patch is attached to the inner wall of the cooling channel, and the cross-sectional shape of the memory alloy patch is arc. 8. A radiator, characterized in that it comprises a tube-and-belt heat exchanger; The inner wall of the cooling tube of the tube-band heat exchanger is provided with a memory alloy patch; The memory alloy patch includes a base and at least one perturbation fin on the base; the perturbation fin can be deformed correspondingly within a preset temperature range to change the clamping between the perturbation fin and the base horn. 9. A cylinder of an internal combustion engine, comprising: a cooling channel; The inner wall of the cooling channel is provided with a memory alloy patch; The memory alloy patch includes a base and at least one perturbation fin on the base; the perturbation fin can be deformed correspondingly within a preset temperature range to change the clamping between the perturbation fin and the base horn. 10 . An internal combustion engine, characterized in that it comprises the cooling system for an internal combustion engine that utilizes memory alloys to enhance heat transfer according to any one of claims 1 to 7 .

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