Passive temperature control system for lubricating oil tank and lubricating oil tank system
By combining phase change energy storage modules, self-regulating heat flow channels, and integrated radiation reflection and insulation modules, passive temperature control of the lubricating oil tank is achieved, solving the problem of difficult lubricating oil viscosity management in heavy-duty diesel engineering vehicles under extreme temperature environments, reducing energy consumption and carbon emissions, and improving equipment start-up efficiency and mechanical life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING INST OF TECH
- Filing Date
- 2025-06-23
- Publication Date
- 2026-06-19
AI Technical Summary
Existing heavy-duty diesel engineering vehicles face difficulties in managing lubricant viscosity under extreme temperature conditions. Traditional temperature control systems are inefficient and rely on external energy sources, resulting in high energy consumption and severe carbon emissions.
By employing a phase change energy storage module and a self-regulating heat flow channel module, combined with a radiation reflection and thermal insulation integrated module, passive temperature control is achieved. Through the heat absorption and release functions of the phase change material, combined with the automatic adjustment of the shape memory alloy sheet, bidirectional temperature regulation is achieved in the lubricating oil tank, and external heat conduction is reduced through radiation reflection and thermal insulation layer.
Without external energy input, adaptive and stable temperature control within the lubricating oil tank is achieved, reducing energy consumption and carbon emissions, solving the viscosity management problem of lubricating oil under extreme temperatures, and improving the starting efficiency and lifespan of mechanical equipment.
Smart Images
Figure CN122236531A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of temperature control system technology, and in particular to a passive temperature control system for a lubricating oil tank and a lubricating oil tank system. Background Technology
[0002] When heavy-duty diesel engineering vehicles operate in extreme temperature environments (such as -40°C or 50°C), the viscosity management of the lubricating oil directly affects equipment starting efficiency, energy consumption, and mechanical life. According to a 2022 research report by the American Society of Mechanical Engineers (ASME), at low temperatures, a 10% decrease in lubricating oil viscosity increases engine cold-start energy consumption by approximately 15% and raises the risk of mechanical wear by 20%. At high temperatures, the oxidation rate of the oil increases exponentially with temperature, and the rate of lubrication performance degradation can be more than three times that at room temperature. Traditional temperature control solutions, such as electric heating rods or fuel-assisted preheating systems, while alleviating temperature issues to some extent, also have significant drawbacks: the International Energy Agency (IEA) 2023 Industrial Energy Analysis Report points out that the coefficient of performance (COP) of resistance heating is less than 1, and it requires continuous power supply in extremely cold regions, leading to serious energy waste; while fuel preheaters increase exhaust emissions. Summary of the Invention
[0003] The purpose of this invention is to provide a passive temperature control system for a lubricating oil tank and a lubricating oil tank system to solve the problems existing in the prior art, realize passive temperature control, eliminate the need for external energy input, and significantly reduce energy consumption and carbon emissions.
[0004] To achieve the above objectives, the present invention provides the following solution:
[0005] This invention provides a passive temperature control system for a lubricating oil tank, comprising: a phase change energy storage module and a self-regulating heat flow channel module. The phase change energy storage module is at least partially disposed on the outer wall of the inner liner of the lubricating oil tank. When the internal temperature of the inner liner is higher than a first temperature threshold, the phase change energy storage module absorbs the heat released by the inner liner; when the internal temperature of the inner liner is lower than a second temperature threshold, the phase change energy storage module releases heat to the inner liner; the first temperature threshold is greater than the second temperature threshold. The self-regulating heat flow channel module includes a heat flow channel that extends through the interior of the lubricating oil tank, with both its inlet and outlet connected to the external atmosphere. The heat flow channel is lined with a plurality of shape memory alloy sheets, each with heat exchange holes. The shape memory alloy sheets are configured such that the heat exchange holes enlarge when the temperature rises and shrink until they are completely closed when the temperature falls.
[0006] Preferably, it further includes a radiation reflection and heat insulation integrated module, which is at least covered on another part of the inner wall of the lubricating oil tank liner; the radiation reflection and heat insulation integrated module is used to impede heat conduction between the inside and outside of the liner.
[0007] Preferably, the heat flow channel is covered with multiple shape memory alloy sheets, which are regular polygons and arranged in a honeycomb pattern.
[0008] Preferably, the phase change energy storage module is disposed on the outer wall of the lower part of the lubricating oil tank inner liner; the radiation reflection and heat insulation integrated module is disposed on the outer wall of the upper part of the lubricating oil tank inner liner.
[0009] Preferably, it also includes an engine exhaust pipe, the extension path of which passes through the interior of the lubricating oil tank liner.
[0010] Preferably, the phase change energy storage module includes a composite phase change material layer.
[0011] Preferably, the radiation reflection and heat insulation integrated module includes a stacked aerogel heat insulation layer and an infrared reflective coating.
[0012] Preferably, the radiation reflection and heat insulation integrated module is detachably connected to the lubricating oil tank via a snap-fit.
[0013] Preferably, the system further includes a temperature sensor and a communication module. The temperature sensor is disposed inside the lubricating oil tank and is communicatively connected to the communication module. The communication module is used to communicate with the vehicle control system and to transmit the temperature information inside the lubricating oil tank to the vehicle control system.
[0014] The present invention also provides a lubricating oil tank system, including: the passive temperature control system for the lubricating oil tank as described above.
[0015] The present invention achieves the following technical effects compared to the prior art:
[0016] First, the passive temperature control system for the lubricating oil tank provided by this invention uses a phase change energy storage module to bidirectionally regulate the temperature inside the lubricating oil tank. Specifically, at high temperatures, the phase change energy storage module absorbs and stores heat; at low temperatures, it releases heat, thus achieving bidirectional regulation of the lubricating oil within the tank. Second, the size of the heat exchange holes on the self-regulating heat flow channel module changes with temperature, automatically adjusting the heat transfer between the module and the lubricating oil in the tank. Specifically, at low temperatures, the heat exchange holes are reduced to decrease the heat transfer between the module and the oil, thus maintaining the temperature of the oil in the tank. At high temperatures, the holes are enlarged to enhance the heat transfer between the module and the oil, thus rapidly dissipating heat from the oil. Both of these regulation processes in this invention require no external energy input, achieving passive temperature control and significantly reducing energy consumption and carbon emissions.
[0017] Secondly, the present invention also includes a radiation reflection and heat insulation integrated module, which is used to achieve the heat preservation effect and reduce the impact of low and high temperatures in the surrounding environment on the lubricating oil in the lubricating oil tank. This process does not require external energy input, realizing passive temperature control and significantly reducing energy consumption and carbon emissions.
[0018] Third, the radiation reflection and heat insulation integrated module in this invention adopts a modular design, which can be installed on the lubricating oil tank by snap-fit, which makes it easy to disassemble and replace the radiation reflection and heat insulation integrated module separately. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the structure of the passive temperature control system for the lubricating oil tank provided in an embodiment of the present invention, which is installed on the lubricating oil tank.
[0021] Figure 2 This is a schematic diagram of the honeycomb-structured shape memory alloy sheets arranged in the passive temperature control system for the lubricating oil tank provided in an embodiment of the present invention.
[0022] In the diagram: 1-Inner liner; 2-Outer wall of the fuel tank; 3-Lubricating oil tank; 4-Infrared reflective coating; 5-Aerogel insulation layer; 6-Radiation reflection and heat insulation integrated module; 7-Phase change energy storage module; 8-Self-regulating heat flow channel module; 9-Engine exhaust pipe; 10-Snap fastener; 11-Lubricating oil pump; 12-Return oil pipe; 13-Dip gauge; 14-Temperature sensor; 15-Communication module; 16-Fuel filler neck; 17-Shape memory alloy sheet. Detailed Implementation
[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0024] The purpose of this invention is to provide a passive temperature control system for a lubricating oil tank and a lubricating oil tank system to solve the problems existing in the prior art, realize passive temperature control, eliminate the need for external energy input, and significantly reduce energy consumption and carbon emissions.
[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0026] Existing heavy-duty diesel engineering vehicles suffer from difficulties in cold starts and increased mechanical wear due to excessively high lubricant viscosity in extreme low-temperature environments. Conversely, the oxidation rate of the lubricant increases significantly under high-temperature conditions. Traditional temperature control systems heavily rely on external energy sources and have low energy efficiency. Therefore, this invention provides a passive temperature control system for lubricating oil tanks. This system, through the coordinated action of multiple modules, requires no external energy input and can achieve adaptive and stable control of lubricating oil within an extreme temperature range of -40℃ to 50℃. It effectively solves problems such as oil solidification, abnormal viscosity, and oxidation degradation, while reducing energy consumption and carbon emissions, meeting the stringent requirements of polar exploration, military equipment, and scenarios without power supply.
[0027] The following is combined with Figures 1-2 The following describes embodiments of the present invention.
[0028] Example 1
[0029] This invention provides a passive temperature control system for a lubricating oil tank, comprising: a phase change energy storage module 7 and a self-regulating heat flow channel module 8. The phase change energy storage module 7 is at least partially covered on the outer wall of the inner liner 1 of the lubricating oil tank. When the internal temperature of the inner liner 1 is higher than a first temperature threshold, the phase change energy storage module 7 absorbs the heat released by the inner liner 1; when the internal temperature of the inner liner 1 is lower than a second temperature threshold, the phase change energy storage module 7 releases heat to the inner liner 1; the first temperature threshold is greater than the second temperature threshold. The self-regulating heat flow channel module 8 includes a heat flow channel that penetrates the interior of the lubricating oil tank 3, with both its inlet and outlet connected to the external atmosphere. The heat flow channel is covered with a plurality of shape memory alloy sheets 17, each with heat exchange holes. The shape memory alloy sheets 17 are configured such that the heat exchange holes enlarge when the temperature rises and shrink until they are completely closed when the temperature falls.
[0030] The passive temperature control system for the lubricating oil tank provided by this invention uses a phase change energy storage module 7 to bidirectionally regulate the temperature inside the lubricating oil tank 3. Specifically, at high temperatures, the phase change energy storage module 7 absorbs and stores heat; at low temperatures, it releases heat, thus achieving bidirectional regulation of the lubricating oil in the tank 3. Secondly, the size of the heat exchange holes on the self-regulating heat flow channel module 8 changes with temperature, automatically adjusting the heat transfer between the module and the lubricating oil in the tank 3. Specifically, at low temperatures, the heat exchange holes are reduced to decrease the heat transfer between the module and the oil, thus keeping the oil in the tank 3 warm; at high temperatures, the holes are enlarged to enhance the heat transfer between the module and the oil, thus rapidly dissipating heat from the oil. Both of these regulation processes in this invention require no external energy input, achieving passive temperature control and significantly reducing energy consumption and carbon emissions.
[0031] Existing heat flow control technologies typically adjust the heat conduction capacity of heat flow channels using mechanical valves or electronic temperature control devices, but these methods are poorly suited for scenarios without power supply. In contrast, the shape memory alloy sheet 17 in this invention employs an adaptive control technology based on physical deformation, achieving automatic adjustment without requiring electrical energy input.
[0032] The passive temperature control system for lubricating oil tanks provided by this invention can be adapted to various lubricating media, such as biodiesel and synthetic lubricating oil.
[0033] In some embodiments, the present invention further includes a radiation reflection and heat insulation integrated module 6, which is at least covered on the inner wall of another part of the lubricating oil tank liner 1; the radiation reflection and heat insulation integrated module 6 is used to block heat conduction between the inside and outside of the liner 1.
[0034] The radiation reflection and heat insulation integrated module 6 in this invention is used to achieve the heat preservation effect, reduce the impact of low and high ambient temperatures on the lubricating oil in the lubricating oil tank 3. This process does not require external energy input, realizes passive temperature control, and significantly reduces energy consumption and carbon emissions.
[0035] In extremely cold environments, the integrated radiation reflection and thermal insulation module 6 effectively blocks heat conduction from the external low-temperature air while reflecting infrared radiation heat from inside the oil tank, keeping the lubricating oil within a suitable temperature range. In high-temperature environments, the module effectively reflects high-temperature radiation from the engine compartment, preventing external heat from being conducted into the oil tank, thereby reducing the risk of lubricating oil overheating. The low thermal conductivity of the aerogel material ensures efficient thermal insulation performance, while the infrared reflective coating 4 further optimizes the thermal management performance of the oil tank by selectively reflecting thermal radiation of specific wavelengths.
[0036] Specifically, the phase change energy storage module 7 is installed on the outer wall of the lower part of the lubricating oil tank inner liner 1; the radiation reflection and heat insulation integrated module 6 is installed on the outer wall of the upper part of the lubricating oil tank inner liner 1.
[0037] This embodiment can improve the service life of the phase change energy storage module 7. Usually, the temperature at the top of the lubricating oil tank is high and the temperature at the bottom is low. If the phase change energy storage module 7 is also covered at the top of the lubricating oil tank, the phase change energy storage module 7 is easy to be damaged and needs to be replaced frequently. However, this application reduces the risk of damage to the phase change energy storage module 7.
[0038] Of course, in some embodiments, the phase change energy storage module 7 can be fully covered outside the inner liner without setting the radiation reflection and heat insulation integrated module 6. In this case, although it does not have heat insulation and reflection functions, the energy storage effect is increased.
[0039] In some embodiments, a plurality of shape memory alloy sheets 17 are provided, the shape memory alloy sheets 17 are regular polygons, and the plurality of shape memory alloy sheets 17 are arranged in a honeycomb pattern.
[0040] This embodiment further improves the heat exchange regulation capability of the heat flow channel and lubricating oil, thereby improving the temperature regulation effect.
[0041] More specifically, shape memory alloy sheets 17 are arranged on the inner wall of the heat flow channel as much as possible. In the most preferred embodiment, the inner wall of the heat flow channel is covered with shape memory alloy sheets 17, which maximizes the heat exchange regulation capability.
[0042] In some embodiments, the present invention further includes an engine exhaust pipe 9, the extension path of which passes through the interior of the lubricating oil tank liner 1.
[0043] The engine exhaust pipe 9 provided in this embodiment is used to heat the lubricating oil under low-temperature conditions, thereby increasing the temperature of the lubricating oil under low-temperature conditions and ultimately improving the safety of equipment operation.
[0044] In some embodiments, the phase change energy storage module 7 includes a composite phase change material layer. The composite phase change material layer is disposed between the inner liner 1 of the lubricating oil tank and the outer wall 2 of the tank. The composite phase change material layer is a multi-component composite phase change material with a phase change temperature range adapted to the oil's solidification point to its oxidation critical temperature range. It also possesses excellent cycle stability and a service life meeting industry standards. It is understood that there is a sandwich layer between the inner liner 1 of the lubricating oil tank and the outer wall 2 of the tank, and the composite phase change material layer is disposed within this sandwich layer. In some examples, by controlling the filling rate of the composite phase change material layer within the sandwich layer within a reasonable range, the balance between latent heat storage capacity and the mechanical strength of the oil tank is ensured.
[0045] In the field of phase change materials (PCM) applications, a 2021 study in Applied Thermal Engineering showed that single organic PCM materials (such as paraffin) are prone to phase separation below -30°C, with latent heat storage efficiency decreasing by more than 40% and cycle stability less than 1000 cycles; while inorganic PCM materials (such as hydrated salts) have problems such as high supercooling and low thermal conductivity.
[0046] This invention effectively solves the problem of poor cycle stability of single materials by using multi-component composite phase change materials, and improves the latent heat storage efficiency compared with traditional technologies.
[0047] In some embodiments, the radiation reflection and thermal insulation integrated module 6 includes a stacked aerogel thermal insulation layer 5 and an infrared reflective coating 4. Specifically, the infrared reflective coating 4 is a multilayer metal oxide composite coating with high reflectivity, and is laminated with the aerogel thermal insulation layer 5 through a hot-pressing process to form a continuous thermally insulating interface.
[0048] Existing thermal insulation technologies mostly rely on traditional foam or mineral wool. Experimental data published in the *Journal of Materials Science* in 2020 showed that these materials have a reflectivity of less than 30% for radiant heat, and their thermal insulation performance decreases by more than 50% at high temperatures, making them ineffective at preventing the loss of external heat conduction and internal heat radiation. This invention employs a composite structure of nanoporous aerogel and multilayer metal oxide coatings, significantly suppressing bidirectional heat transfer.
[0049] In some embodiments, the radiation reflection and thermal insulation integrated module 6 is detachably connected to the lubricating oil tank 3 via a snap-fit 10.
[0050] The radiation reflection and heat insulation integrated module 6 in this invention adopts a modular design, which can be installed on the lubricating oil tank 3 through the buckle 10, which makes it easy to disassemble and replace the radiation reflection and heat insulation integrated module 6 individually.
[0051] In some embodiments, the present invention further includes a temperature sensor and a communication module. The temperature sensor is disposed inside the lubricating oil tank and is communicatively connected to the communication module. The communication module is used to communicate with the vehicle control system and to transmit the temperature information inside the lubricating oil tank to the vehicle control system.
[0052] This embodiment of the invention integrates a temperature sensor 14 and a communication module 15, enabling real-time monitoring of lubricating oil temperature. The data is then uploaded to the vehicle control system via a wireless communication module to optimize temperature control strategies. Through this method, the system can intelligently adjust the temperature under different environmental conditions, ensuring the lubricating oil remains in optimal working condition without manual intervention or additional energy input.
[0053] The specific work process is as follows:
[0054] The system can operate in three modes: low temperature insulation mode, high temperature heat dissipation mode, and dynamic temperature control mode, depending on changes in ambient temperature. These three modes can be switched to ensure that the lubricating oil tank 3 maintains the optimal operating temperature under different working conditions.
[0055] 1. Low temperature insulation mode (suitable for extremely cold working conditions).
[0056] When the ambient temperature drops to the risk range for lubricating oil to solidify, the system automatically enters a low-temperature insulation mode, mainly relying on the latent heat release of the phase change energy storage module 7 and the efficient insulation performance of the insulation module to maintain stable oil temperature. This mode consists of three main aspects: ① Heat release: The composite phase change material in the phase change energy storage module 7 begins to release the stored latent heat and evenly transfers the heat to the inside of the oil tank through a heat conduction path, keeping the lubricating oil temperature within a reasonable range and preventing low-temperature solidification or viscosity surge; ② Reduced heat loss: The shape memory alloy blades in the self-regulating heat flow channel module 8 automatically close due to the low ambient temperature, thereby effectively reducing heat conduction efficiency and reducing heat loss from the lubricating oil; ③ Two-way insulation: The nano-aerogel layer of the radiation reflection and insulation integrated module 6 blocks the heat conduction of cold external air, while the infrared reflective coating 4 reflects the infrared radiation heat inside the oil tank back into the system, forming an efficient insulation barrier. Through this mode, the system can ensure that the lubricating oil maintains sufficient fluidity in extremely cold environments, thereby improving the success rate of engine cold starts and reducing additional energy consumption.
[0057] 2. High-temperature heat dissipation mode (suitable for high-temperature or long-term operation conditions).
[0058] When the ambient temperature rises or the engine runs for an extended period, causing the oil tank temperature to become excessively high, the system enters a high-temperature cooling mode to prevent the lubricating oil temperature from exceeding its operating limit, thereby reducing the oil oxidation rate and improving lubrication performance. This mode consists of three main aspects: ① Absorbing excess heat: The composite phase change material in the phase change energy storage module 7 absorbs excess heat from the oil tank and stores it in the phase change material layer, thus slowing down the rate of oil temperature rise; ② Enhancing convection cooling: The shape memory alloy blades in the self-regulating heat flow channel module 8 automatically deploy under high-temperature conditions, fully opening the honeycomb channels to enhance air convection and improve heat dissipation efficiency; ③ Reflecting external heat sources: The radiation-reflective coating effectively reflects high-temperature radiation from the engine compartment or the external environment, preventing further heat conduction into the oil tank and reducing temperature fluctuations. Through this mode, the system can effectively control the temperature rise of the lubricating oil under high-temperature or long-term operating conditions, preventing accelerated oil oxidation due to excessive temperature while ensuring the stability of lubrication performance.
[0059] 3. Dynamic temperature control mode (suitable for operating conditions with large fluctuations in ambient temperature).
[0060] Under conditions of frequent ambient temperature changes or unstable operating conditions, the system can achieve adaptive temperature regulation through dynamic temperature control mode to maintain the thermal balance inside the oil tank. This mode consists of three main aspects: ① Latent heat regulation: When the oil temperature approaches the operating range of the phase change material, the phase change energy storage module 7 will automatically release or absorb heat to buffer sudden temperature fluctuations and ensure stable lubricating oil temperature; ② Dynamic blade angle adjustment: The opening and closing angle of the shape memory alloy blades can be intelligently adjusted according to real-time temperature data to achieve an optimal balance between convection heat dissipation and heat preservation; ③ Intelligent monitoring and feedback: The system integrates a temperature sensor 14 and a communication module 15, which can monitor the lubricating oil temperature in real time and upload the data to the vehicle control system via a wireless communication module to optimize the temperature control strategy. Through this mode, the system can intelligently adjust the temperature under different environmental conditions to ensure that the lubricating oil is always kept in the best working condition without manual intervention or additional energy input.
[0061] Example 2
[0062] The present invention also provides a lubricating oil tank system, including: the passive temperature control system for the lubricating oil tank in Embodiment 1.
[0063] This embodiment possesses all the advantages of Embodiment 1, and will not be repeated here.
[0064] The lubricating oil tank system provided by the present invention also includes an oil return pipe 12, a lubricating oil pump 11, an oil gauge 13, and an oil filling port 16.
[0065] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.
Claims
1. A passive temperature control system for a lubricating oil tank, characterized in that: include: A phase change energy storage module is at least partially covered on the outer wall of the inner liner of a lubricating oil tank. When the internal temperature of the inner liner of the lubricating oil tank is higher than a first temperature threshold, the phase change energy storage module is used to absorb the heat released by the inner liner. When the internal temperature of the inner liner of the lubricating oil tank is lower than a second temperature threshold, the phase change energy storage module is used to release heat to the inner liner. The first temperature threshold is greater than the second temperature threshold. The self-regulating heat flow channel module includes a heat flow channel that extends inside the lubricating oil tank. The inlet and outlet of the heat flow channel are both connected to the external atmosphere of the lubricating oil tank. The interior of the heat flow channel is covered with a plurality of shape memory alloy sheets. The shape memory alloy sheets have heat exchange holes. The shape memory alloy sheets are configured such that the heat exchange holes enlarge when the temperature rises and shrink until they are completely closed when the temperature drops.
2. The passive temperature control system for the lubricating oil tank according to claim 1, characterized in that: It also includes a radiation reflection and heat insulation integrated module, which is at least covered on another part of the inner wall of the lubricating oil tank liner; the radiation reflection and heat insulation integrated module is used to impede heat conduction between the inside and outside of the liner.
3. The passive temperature control system for the lubricating oil tank according to claim 1, characterized in that: The heat flow channel is lined with multiple shape memory alloy sheets, which are regular polygons and arranged in a honeycomb pattern.
4. The passive temperature control system for the lubricating oil tank according to claim 2, characterized in that: The phase change energy storage module is located on the outer wall of the lower part of the lubricating oil tank inner liner; the radiation reflection and heat insulation integrated module is located on the outer wall of the upper part of the lubricating oil tank inner liner.
5. The passive temperature control system for the lubricating oil tank according to claim 1, characterized in that: It also includes an engine exhaust pipe, the extension path of which passes through the interior of the lubricating oil tank liner.
6. The passive temperature control system for the lubricating oil tank according to claim 1, characterized in that: The phase change energy storage module includes a composite phase change material layer.
7. The passive temperature control system for the lubricating oil tank according to claim 2, characterized in that: The radiation reflection and thermal insulation integrated module includes a stacked aerogel thermal insulation layer and an infrared reflective coating.
8. The passive temperature control system for the lubricating oil tank according to claim 2, characterized in that: The radiation reflection and heat insulation integrated module is detachably connected to the lubricating oil tank via a snap-fit.
9. The passive temperature control system for the lubricating oil tank according to claim 2, characterized in that: It also includes a temperature sensor and a communication module. The temperature sensor is located inside the lubricating oil tank and is communicatively connected to the communication module. The communication module is used to communicate with the vehicle control system and to transmit the temperature information inside the lubricating oil tank to the vehicle control system.
10. A lubricating oil tank system, characterized in that: include: The passive temperature control system for the lubricating oil tank according to any one of claims 1 to 9.