CN111878217A - Cooling system, device and equipment of internal combustion engine for enhancing heat transfer by using memory alloy - Google Patents

Abstract

The invention discloses a cooling system, a device and equipment of an internal combustion engine for strengthening heat transfer by using a memory alloy. The cooling system of the internal combustion engine includes: a cooling channel of the tube-and-band heat exchanger and the cylinder in the radiator; a memory alloy patch is arranged on the inner wall of the cooling pipe of the pipe-belt type heat exchanger and/or the inner wall of the cooling channel; the memory alloy patch comprises a base and at least one disturbance rib on the base; the disturbance fin can generate corresponding strain in a preset temperature range, and an included angle between the disturbance fin and the base is changed. The included angle between the disturbance fins and the base is adjusted along with the temperature, and the coolant flowing through the pipe belt type heat exchanger and/or the cooling channel is disturbed, so that the heat dissipation capacity of the cooling system of the internal combustion engine is changed along with the change of the temperature in a self-adaptive manner, the heat dissipation enhancement and the energy loss are comprehensively measured, the heat dissipation requirement of the internal combustion engine under the high-temperature working condition is met, and the additional energy loss caused by the heat dissipation enhancement is reduced to a reasonable level.

Description

Cooling system, device and equipment of internal combustion engine for enhancing heat transfer by using memory alloy

Technical Field

The invention relates to a cooling system, a device and equipment of an internal combustion engine, which utilize memory alloy to strengthen heat transfer.

Background

An internal combustion Engine (Engine) is an energy conversion device and is a power source of vehicles, ships and other transportation tools. Because the internal-combustion engine can produce a large amount of heats when working, if the operating temperature of internal-combustion engine is too high, will lead to the high temperature expansion of internal-combustion engine spare part and influence normal fit clearance, cause moving part motion obstructed, serious consequence such as card even death. Therefore, in order to prevent the operating temperature of the internal combustion engine from becoming excessively high. It is necessary to provide the internal combustion engine with a cooling system that maintains the operating temperature of the internal combustion engine within a suitable range.

When the internal combustion engine starts to work, at the moment, a valve of a thermostat of the internal combustion engine is in a closed state, a liquid supply pump supplies cooling liquid to a cooling channel of a cylinder, the cooling liquid circulates between the liquid supply pump and the cooling channel, and a small amount of heat generated by the working of the internal combustion engine is absorbed, so that the problem that the internal combustion engine is difficult to start due to too low temperature is solved; when the internal combustion engine normally works, the temperature of the cooling liquid exceeds the preset temperature, at the moment, the valve of the thermostat is opened, the cooling liquid enters the cooling pipe of the pipe-in-pipe belt type heat exchanger in the radiator after absorbing heat in the cooling channel of the cylinder, heat exchange is carried out between air generated by a fan in the radiator and the cooling liquid absorbing heat in the cooling pipe, and the heat is finally dissipated to the external environment, so that the internal combustion engine is cooled. However, when the internal combustion engine is operated under an extreme condition and the operating temperature of the internal combustion engine is higher than a certain value, the valve of the thermostat is completely opened, the cooling strength of the internal combustion engine is maximized, the temperature of the coolant after being radiated by the radiator is still high, and the expected cooling effect of the internal combustion engine cannot be achieved. Therefore, how to further improve the cooling strength of the internal combustion engine, promote the rapid discharge of heat generated in the internal combustion engine, and prevent the internal combustion engine from working at an excessively high temperature is an urgent technical problem to be solved.

Disclosure of Invention

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

As an aspect of an embodiment of the present invention, there is provided a cooling system of an internal combustion engine for enhancing heat transfer using a memory alloy, including: the cooling channel of the tube-and-band heat exchanger and the cylinder of the radiator;

a memory alloy patch is arranged on the inner wall of the cooling pipe of the pipe-belt type heat exchanger and/or the inner wall of the cylinder cooling channel;

the memory alloy patch comprises a base and at least one disturbance rib on the base; the disturbance fin can generate corresponding strain in a preset temperature range, and an included angle between the disturbance fin and the base is changed.

In one embodiment, an angle between the at least one turbulence rib and the base opens in a direction opposite to a flow direction of the cooling fluid in the cooling tube and the cylinder cooling gallery.

In one embodiment, the minimum value of the angle between the at least one disturbing rib and the base is 0 °, and the maximum value of the angle between the at least one disturbing rib and the base is in the range of 30 ° to 45 °.

In one embodiment, the at least one perturbation rib is integrally formed with the base.

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

the opening degree of the valve of the thermostat is increased along with the temperature rise of the cooling liquid flowing through the thermostat, and the minimum value of the temperature in the 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 minimum.

In one embodiment, the heat sink comprises a tube-and-strip heat exchanger and a fan;

the pipe-belt heat exchanger comprises a cooling pipe and a heat dissipation belt, and the memory alloy patch is attached to the inner wall of the cooling pipe; the cross section of the substrate of the memory alloy patch is rectangular.

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 section of the memory alloy patch is arc-shaped.

As an aspect of an embodiment of the present invention, there is provided a radiator including a tube-and-strip heat exchanger;

a memory alloy patch is arranged on the inner wall of the cooling pipe of the pipe belt type heat exchanger;

the memory alloy patch comprises a base and at least one disturbance rib on the base; the disturbance fin can generate corresponding strain in a preset temperature range, and an included angle between the disturbance fin and the base is changed.

As an aspect of an embodiment of the present invention, there is provided a cylinder of an internal combustion engine, including: a cooling channel;

a memory alloy patch is arranged on the inner wall of the cooling channel;

the memory alloy patch comprises a base and at least one disturbance rib on the base; the disturbance fin can generate corresponding strain in a preset temperature range, and an included angle between the disturbance fin and the base is changed.

As an aspect of an embodiment of the present invention, it relates to an internal combustion engine including the cooling system of the internal combustion engine for enhancing heat transfer using a memory alloy as described above.

The embodiment of the invention at least realizes the following technical effects:

the embodiment of the invention relates to a cooling system, a device and equipment of an internal combustion engine for strengthening heat transfer by using a memory alloy. When the temperature does not reach the preset temperature range, the memory alloy patch is in an initial state, so that the pressure of the flowing cooling liquid in the cooling pipe of the pipe-belt type heat exchanger and the cooling channel of the air cylinder is not influenced, and the energy loss is avoided; when the temperature reaches the preset temperature range, the disturbance fins deform in a self-adaptive manner according to the temperature of the cooling liquid: along with the gradual rise of the temperature of the cooling liquid, the included angle between the disturbance fins and the base is gradually increased, and the disturbance degree of the cooling liquid flowing through the cooling pipe and the cooling channel is gradually increased, so that the heat exchange coefficients between the cooling liquid in the cooling channel and the internal combustion engine and between the cooling liquid in the cooling pipe and external cooling air are gradually increased, and the heat dissipation efficiency is increased; when the temperature of the cooling liquid is gradually reduced, the shape of the disturbance fin is gradually recovered, the included angle between the disturbance fin and the base is gradually reduced, and the disturbance degree of the cooling liquid is continuously reduced, so that the pressure loss when the cooling liquid flows caused by disturbance is reduced, and unnecessary energy loss is reduced. The included angle between the disturbance fin and the base is adjusted along with the temperature, so that the heat dissipation capacity of a cooling system of the internal combustion engine is changed along with the temperature in a self-adaptive manner, and the cooling intensity of the internal combustion engine is reasonably adjusted. On one hand, the heat generated by the internal combustion engine at a higher working temperature is quickly discharged, and the heat dissipation effect on the internal combustion engine is improved; on the other hand, the heat dissipation capacity of the cooling system of the internal combustion engine is changed along with the temperature in a self-adaptive manner, so that the additional energy loss caused by enhanced heat dissipation is reduced as much as possible, and unnecessary energy waste is avoided.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic diagram illustrating a structure and an operation principle of a cooling system of an internal combustion engine according to an embodiment of the present invention;

fig. 2A is a schematic perspective view of a tube-and-strip heat exchanger according to an embodiment of the present invention;

fig. 2B is a schematic structural front view of a tube-and-strip heat exchanger according to an embodiment of the present invention;

FIG. 2C is a schematic top view of a tube-and-strip heat exchanger according to an embodiment of the present invention;

fig. 3A is a schematic cross-sectional view of a cooling tube of a tube-and-strip heat exchanger according to an embodiment of the present invention;

FIG. 3B is an enlarged view of a portion A of the cooling tube of FIG. 3A;

FIG. 4A is a schematic structural diagram of a memory alloy patch according to 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;

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

FIG. 5A is a schematic cross-sectional view of a cylinder according to an embodiment of the present invention;

FIG. 5B is an enlarged view of a portion B of the cylinder of FIG. 5A;

FIG. 6A is a schematic structural diagram of another memory alloy patch according to 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;

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

fig. 7 is a schematic diagram of a marmem patch and a relationship between the marmem patch and a cooling fluid flow direction and temperature change according to an embodiment of the present invention.

Detailed Description

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 to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed 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., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.

The first embodiment is as follows:

an embodiment of the present invention provides a cooling system of an internal combustion engine for enhancing heat transfer by using a memory alloy, and as shown in fig. 1 to 7, the cooling system of the internal combustion engine includes: the device comprises a radiator 1, a cylinder 2, a thermostat 3 and a liquid supply pump 4; wherein the radiator 1 comprises a tube-and-strip heat exchanger 11, and the cylinder 2 comprises a cooling channel 21;

the inner wall of the cooling pipe 111 of the pipe-belt heat exchanger 11 and/or the inner wall of the cooling channel 21 is/are provided with a memory alloy patch 101;

the memory alloy patch 101 includes a base 1011 and at least one perturbation rib 1012 on the base; the perturbation rib 1012 may be deformed within a predetermined temperature range, changing the angle between the perturbation rib 1012 and the base 1011.

According to the cooling system of the internal combustion engine, the memory alloy patches are arranged on the inner wall of the cooling pipe of the pipe belt type heat exchanger, and the memory alloy patches are arranged on the inner wall of the cooling channel. When the temperature does not reach the preset temperature range, the memory alloy patch is in an initial state, so that the pressure drop of the flowing cooling liquid in the cooling pipe of the pipe belt type heat exchanger and the cooling channel of the air cylinder is not influenced, and the energy loss is avoided; when the temperature reaches the preset temperature range, the disturbance fins deform in a self-adaptive manner according to the temperature of the cooling liquid: along with the gradual rise of the temperature of the cooling liquid, the included angle between the disturbance fins and the base is gradually increased, and the disturbance degree of the cooling liquid flowing through the cooling pipe and the cooling channel is gradually increased, so that the heat exchange coefficients between the cooling liquid in the cooling channel and the internal combustion engine and between the cooling liquid in the cooling pipe and external cooling air are gradually increased, and the heat dissipation efficiency is increased; when the temperature of the cooling liquid is gradually reduced, the shape of the disturbance fin is gradually recovered, the included angle between the disturbance fin and the base is gradually reduced, and the disturbance degree of the cooling liquid is continuously reduced, so that the pressure loss when the cooling liquid flows caused by disturbance is reduced, and unnecessary energy loss is reduced. The included angle between the disturbance fin and the base is adjusted along with the temperature, so that the heat dissipation capacity of a cooling system of the internal combustion engine is changed along with the temperature in a self-adaptive manner, and the cooling intensity of the internal combustion engine is reasonably adjusted. On one hand, the heat generated by the internal combustion engine at a higher working temperature is quickly discharged, and the heat dissipation effect on the internal combustion engine is improved; on the other hand, the heat dissipation capacity of the cooling system of the internal combustion engine is changed along with the temperature in a self-adaptive manner, so that the additional energy loss caused by enhanced heat dissipation is reduced as much as possible, and unnecessary energy waste is avoided.

The inventor of the invention finds out in tests that because the heat dissipation process of a cooling system of the internal combustion engine belongs to convection heat transfer without phase change, the memory alloy patch prepared by using the memory alloy can effectively increase the disturbance of the cooling liquid, cut off the development of a thermal boundary layer, reduce the thickness of the thermal boundary layer, further increase the heat transfer coefficient and realize the purpose of heat transfer enhancement by increasing the included angle between the disturbance fins of the memory alloy patch and the substrate. Therefore, the embodiment of the invention provides a cooling system of an internal combustion engine for strengthening heat transfer by using a memory alloy, wherein the memory alloy patches are arranged on the inner wall of a cooling pipe of a pipe-type heat exchanger in a radiator of the cooling system of the internal combustion engine, and the memory alloy patches are arranged on the inner wall of a cooling channel of an air cylinder, so that the heat dissipation capacity of the internal combustion engine can be effectively strengthened, and the working performance of the internal combustion engine under a high-temperature working condition is improved.

In one embodiment, the radiator is an important component of a cooling system of an internal combustion engine, and the radiator is composed of a tube-and-strip heat exchanger, a fan, an upper water chamber, a lower water chamber and the like. The tube-and-band heat exchanger is the core part of the radiator and plays a main role in heat dissipation. Referring to fig. 1 and 2A to 2C, a radiator 1 of a cooling system of an internal combustion engine includes a tube-and-strip heat exchanger 11 and a fan 12, wherein the tube-and-strip heat exchanger 11 includes a cooling tube 111 and a heat dissipation strip 112, and wherein the heat dissipation strip 112 may adopt a louver structure. Referring to fig. 3A and 3B, a memory alloy patch 101 is attached to the inner wall of the cooling tube 111 of the tube-and-strip heat exchanger 11. Referring to fig. 6A to 6C, the memory alloy patch has a rectangular cross-sectional shape, and thus, may be disposed on the inner wall of the cooling tube. In the embodiment of the present invention, the connection manner of the memory alloy patch 101 and the cooling tube 111 includes, but is not limited to, a fixed connection manner such as bonding, welding, etc., as long as the memory alloy patch can be attached to the inner wall of the cooling tube 111, and this is not particularly limited in the embodiment of the present invention.

In a specific embodiment, referring to fig. 5A and 5B, the cylinder 2 of the internal combustion engine includes a cylinder liner 22, a cylinder body 23, and a cooling passage 21 formed between the cylinder liner 22 and the cylinder body 23, and the memory alloy patch 101 is attached to an inner wall of the cooling passage 21. Referring to fig. 6A to 6C, the cross-sectional shape of the memory alloy patch substrate is arc-shaped, and thus, may be provided on the inner wall of a cooling pipe of a cylinder of an internal combustion engine. In the embodiment of the present invention, the connection manner of the memory alloy patch 101 and the cooling channel 21 includes, but is not limited to, a fixed connection manner such as bonding, welding, etc., as long as the memory alloy patch can be attached to the inner wall of the cooling channel 21, which is not limited in the embodiment of the present invention.

In one embodiment, and as shown with reference to FIG. 7, the angle between the at least one turbulence rib 1012 of the memory alloy patch 101 and the base 1011 opens in a direction opposite to the direction of flow of the cooling fluid within the cooling tube and cooling channel. The opening direction of the included angle between the disturbance fin and the base is opposite to the flowing direction of the cooling liquid in the cooling pipe and the cooling channel, so that the disturbance effect of the disturbance fin on the cooling liquid flowing through the cooling pipe and the cooling channel is better, and the heat exchange efficiency of the cooling liquid is improved. And as can be seen in fig. 7, the angle between the perturbation rib 1012 and the base 1011 varies with temperature, and may be such that the angle between the perturbation rib and the base increases with increasing temperature.

In a specific embodiment, the minimum value of the angle between the at least one disturbing rib and the base is 0 °, and the maximum value of the angle between the at least one disturbing rib and the base is in the range of 30 ° to 45 °. In the embodiment of the invention, the maximum value of the included angle between the disturbance fins and the base can be between 30 and 45 degrees, because if the included angle is too small, when the temperature of the cooling liquid rises too fast, the disturbance degree of the disturbance fins on the cooling liquid is too small, the heat exchange efficiency of the cooling liquid is too low, and the heat dissipation requirement of the internal combustion engine is still not met, if the included angle is too large, the disturbance degree of the disturbance fins on the cooling liquid is enhanced, but the pressure loss when the cooling liquid flows is increased, and unnecessary energy loss is caused. The inventor of the invention obtains through experiments that when the maximum value of the included angle is between 30 and 45 degrees, the excessive energy loss can be avoided, the disturbance degree of the disturbance fins to the cooling liquid can meet the heat exchange requirement, and the heat dissipation effect to the internal combustion engine is ensured.

In one embodiment, as shown with reference to FIGS. 4A-4C and 6A-6C, in an embodiment of the present invention, the at least one perturbation rib 1012 of the memory alloy patch is uniformly distributed on the base 1011. The number and arrangement of the disturbance fins of the memory alloy patch in the embodiment of the invention can be selected according to actual requirements, and are not particularly limited.

In one embodiment, as shown in fig. 4A to 4C and fig. 6A to 6C, the disturbance fins 1012 of the memory alloy patch have a rectangular cross section, and are adopted, so that not only can excessive energy loss be avoided, but also the disturbance degree of the disturbance fins to the coolant can meet the heat exchange requirement, and the heat dissipation effect on the internal combustion engine can be ensured. Of course, the cross section of the disturbance rib may also be a diamond shape, an oval shape, a circular shape or a triangular shape, and the shape of the cross section of the disturbance rib may be selected according to actual requirements, and is not particularly limited in the embodiment of the present invention.

In one embodiment, the memory alloy patches are each made of memory alloy, and as shown with reference to FIGS. 4A-4C and 6A-6C, the at least one perturbation rib 1012 of the memory alloy patch is integrally formed with the base 1011. In the embodiment of the invention, the memory alloy patch obtained by integrally forming the disturbance fins and the base can be used for more conveniently carrying out memory training, so that the disturbance fins of the memory alloy patch can be sensitively deformed along with the temperature change.

The memory alloy for preparing the memory alloy patch can adopt 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 invention, the memory training is carried out on the memory alloy patch, so that the disturbance fins on the memory alloy patch can realize the deformation required by the invention. Training for the memory alloy patch can adopt training methods such as stress application and heat treatment, and the specific training method can adopt a mode in the prior art, and is not described in detail in the embodiment of the invention.

In the embodiment of the invention, when the internal combustion engine is cooled and the cooling liquid flows in the cooling channel, the cooling liquid absorbs heat generated by the operation of the internal combustion engine, the heat-absorbed cooling liquid flows into the cooling pipe, the fan of the radiator blows external air into the pipe-belt heat exchanger, so that the external air and the heat-absorbed cooling liquid in the cooling pipe exchange heat, and finally the heat is dissipated to the external environment. Referring to fig. 3A, since the cooling pipe of the tube-and-strip heat exchanger may be a flat pipe, memory alloy patches may be provided on both sides of the flat pipe. In an embodiment of the present invention, the cooling system of the internal combustion engine further includes a thermostat, and a degree of opening of a valve of the thermostat increases as a temperature of the coolant flowing through the thermostat increases. Based on this, the minimum temperature value of the preset temperature range is greater than or equal to the temperature of the cooling liquid when the valve of the thermostat is opened to the minimum degree.

Referring to fig. 1, when the internal combustion engine starts, the valve of the thermostat 3 is in a closed state, the liquid supply pump 4 supplies the low-temperature coolant which does not absorb heat of the engine to the cooling passage 21 of the cylinder 2, at this time, the coolant only absorbs a small amount of heat generated when the internal combustion engine starts, the temperature of the low-temperature coolant rises a little, the valve of the thermostat 3 is in a closed state, the low-temperature coolant does not flow through the radiator 1 and only circulates between the liquid supply pump 4 and the cooling passage 21, at this time, the disturbance fins of the memory alloy patches of the cooling passage 21 do not deform, and the heat exchange coefficient between the coolant and the cylinder remains unchanged, so as to prevent the internal combustion engine from being started up difficultly due to too; when the internal combustion engine works normally, the working temperature of the internal combustion engine rises, the low-temperature cooling liquid flowing through the cooling channel starts to absorb a large amount of heat generated by the normal work of the internal combustion engine, the temperature of the low-temperature cooling liquid rises gradually along with the working temperature of the internal combustion engine, the low-temperature cooling liquid also becomes a large amount of high-temperature cooling liquid after absorbing the heat gradually, when the temperature of the high-temperature cooling liquid reaches the temperature for opening the valve of the thermostat, the valve of the thermostat 3 is opened, and then the high-temperature cooling liquid after absorbing the heat enters the pipe belt type heat exchanger 11 of the radiator. The flow of the high-temperature cooling liquid after heat absorption can be adjusted by adjusting the opening degree of the valve of the thermostat 3. When the temperature of the high-temperature cooling liquid after heat absorption rises to the temperature minimum value in the preset temperature range, the disturbance fins of the memory alloy patch in the cooling pipe and the disturbance fins of the memory alloy patch in the cooling channel both begin to deform, the included angle between the disturbance fins and the base increases along with the rise of the temperature, when the temperature of the high-temperature cooling liquid after heat absorption rises to the temperature maximum value in the preset temperature range, the included angle between the disturbance fins and the base reaches the maximum value, and when the temperature of the cooling liquid continues to rise, the included angle between the disturbance fins and the base is kept at the maximum value. The fan 12 of the radiator 1 blows external air into the tube-and-strip heat exchanger 11, cools the high-temperature cooling liquid after heat absorption flowing through the cooling tube 111 in the tube-and-strip heat exchanger 11, the heat absorbed by the fan air is finally dissipated to the external environment, the temperature of the high-temperature cooling liquid starts to decrease and gradually returns to be low-temperature cooling liquid, and the low-temperature cooling liquid after heat dissipation enters the cooling channel 21 again through the liquid supply pump 4 to circulate, and the cooling liquid circulation process is repeated to realize cooling of the internal combustion engine.

In the embodiment of the invention, as the included angle between the disturbance fin and the base is increased, the disturbance fin of the memory alloy patch in the cooling channel continuously increases the disturbance to the cooling liquid flowing through the cooling channel, the heat convection coefficient between the cooling liquid and the internal combustion engine is increased, the cooling strength of the cooling liquid in the cooling channel to the internal combustion engine is increased, and the heat of the internal combustion engine can be more quickly transferred to the cooling liquid in the cooling channel. Along with the increase of the included angle between the disturbance fins and the base, the disturbance fins of the memory alloy patch in the cooling pipe continuously increase the disturbance to the cooling liquid after heat absorption through the cooling pipe, the heat exchange coefficient between the cooling liquid after heat absorption and the air blown into the outside of the pipe belt type heat exchanger by the fan is increased, the cooling strength of the cooling liquid after heat absorption in the cooling pipe by the outside air blown into the pipe belt type heat exchanger by the fan of the radiator is increased, and the heat of the cooling liquid can be dissipated into the air more quickly.

The disturbance fins of the memory alloy patch deform to disturb the cooling liquid flowing through the disturbance fins, so that the development of a thermal boundary layer of the cooling liquid close to the inner wall of the cooling pipe when the cooling liquid flows is cut off, the thickness of the thermal boundary layer is reduced, the heat transfer coefficient of the cooling liquid is increased, and the heat exchange efficiency of the cooling liquid after heat absorption and outside air is enhanced. The disturbance fins of the memory alloy patch deform to disturb the cooling liquid flowing through the disturbance fins, so that the development of a thermal boundary layer of the cooling liquid close to the inner wall of the cooling channel is cut off when the cooling liquid flows, the thickness of the thermal boundary layer is reduced, the heat transfer coefficient of the cooling liquid is increased, and the heat dissipation efficiency between the cooling liquid and the internal combustion engine is enhanced.

In the preset temperature range, the memory alloy patch can adaptively adjust the disturbance degree of the cooling liquid according to the temperature of the cooling liquid, when the temperature gradually drops, the deformation degree of the disturbance fins is weakened, the pressure loss of the flowing cooling liquid is reduced, unnecessary energy loss is avoided, when the temperature gradually rises, the deformation degree of the disturbance fins is strengthened, and the strengthened heat transfer capacity of the cooling liquid is gradually strengthened. Therefore, the invention comprehensively measures two aspects of enhanced heat transfer and energy loss, meets the heat dissipation requirement of the internal combustion engine under the high-temperature working condition, and simultaneously reduces the additional energy loss brought by the enhanced heat transfer capability to a reasonable level.

In a specific embodiment, the coolant may be a common internal combustion engine coolant, such as a glycol-water solution, and the temperature of the coolant when the valve of the thermostat is opened may be between 70 ° and 80 °, so that the minimum value of the preset temperature range may be greater than or equal to 70 °, although the minimum value of the preset temperature range may be selected according to actual needs, which is not particularly limited in the embodiment of the present invention.

Example two:

based on the same inventive concept, the embodiment of the invention also provides a radiator, wherein the radiator 1 comprises a tube-and-strip heat exchanger 11;

the inner wall of a cooling pipe 111 of the pipe-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 rib 1012 on the base 1011; the perturbation rib 1012 may be deformed within a predetermined temperature range, changing the angle between the perturbation rib 1012 and the base 1011.

Example three:

based on the same inventive concept, the embodiment of the present invention also provides a cylinder of an internal combustion engine, the cylinder 2 including: a cooling channel 21;

a memory alloy patch 101 is arranged on the inner wall of the cooling channel 21;

the memory alloy patch 101 includes a base 1011 and at least one perturbation rib 1012 on the base 1011; the perturbation rib 1012 may be deformed within a predetermined temperature range, changing the angle between the perturbation rib 1012 and the base 1011.

Example four:

based on the same inventive concept, the embodiment of the invention also provides an internal combustion engine, which comprises the cooling system of the internal combustion engine, which is described in the first embodiment and enhances heat transfer by using the memory alloy.

The specific implementation of the apparatus and the device described in the second to fourth embodiments may refer to the specific description in the first embodiment, and therefore, the detailed description is omitted here.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the 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 a memory alloy to enhance heat transfer, comprising: the cooling channel of the tube-and-band heat exchanger and the cylinder of the radiator;

a memory alloy patch is arranged on the inner wall of the cooling pipe of the pipe-belt type heat exchanger and/or the inner wall of the cooling channel;

the memory alloy patch comprises a base and at least one disturbance rib on the base; the disturbance fin can generate corresponding strain in a preset temperature range, and an included angle between the disturbance fin and the base is changed.

2. The cooling system of an internal combustion engine according to claim 1, wherein an angle between said at least one turbulence rib and said base opens in a direction opposite to a direction of flow of coolant in said cooling tube and cylinder cooling gallery.

3. A cooling system for an internal combustion engine according to claim 1, wherein the angle between said at least one disturbing rib and said base is 0 ° at the minimum, and the angle between said at least one disturbing rib and said base is 30 ° to 45 ° at the maximum.

4. The cooling system for an internal combustion engine according to claim 1, wherein said at least one turbulence rib is formed integrally with said base.

5. The cooling system of an internal combustion engine according to claim 1, further comprising: a thermostat;

the opening degree of the valve of the thermostat is increased along with the temperature rise of the cooling liquid flowing through the thermostat, and the minimum value of the temperature in the 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 minimum.

6. The cooling system of an internal combustion engine according to any one of claims 1 to 5, wherein the radiator includes a tube-and-band heat exchanger and a fan;

the pipe-belt heat exchanger comprises a cooling pipe and a heat dissipation belt, and the memory alloy patch is attached to the inner wall of the cooling pipe; the cross section of the substrate of the memory alloy patch is rectangular.

7. The cooling system of an internal combustion engine according to any one of claims 1 to 5, wherein 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 section of the memory alloy patch is arc-shaped.

8. A radiator is characterized by comprising a tube-and-strip heat exchanger;

a memory alloy patch is arranged on the inner wall of the cooling pipe of the pipe belt type heat exchanger;

the memory alloy patch comprises a base and at least one disturbance rib on the base; the disturbance fin can generate corresponding strain in a preset temperature range, and an included angle between the disturbance fin and the base is changed.

9. A cylinder of an internal combustion engine, comprising: a cooling channel;

a memory alloy patch is arranged on the inner wall of the cooling channel;

the memory alloy patch comprises a base and at least one disturbance rib on the base; the disturbance fin can generate corresponding strain in a preset temperature range, and an included angle between the disturbance fin and the base is changed.

10. An internal combustion engine comprising the cooling system for an internal combustion engine utilizing a memory alloy for enhancing heat transfer as claimed in any one of claims 1 to 7.

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