Vehicle cold start air conditioning load adaptive control method and vehicle

Abstract

The application discloses a kind of vehicle cold start air conditioning load adaptive control method and vehicle.The method comprises: obtaining the oil pressure after vehicle cold start and starting duration;According to the relationship between oil pressure and preset pressure threshold, and the relationship between starting duration and preset duration threshold determine the lubrication state of engine after vehicle cold start;According to the lubrication state of engine, adjust the operating state of vehicle air conditioner.The scheme of the present application can dynamically adjust the air conditioning load according to the actual lubrication state of engine, can reduce the power of air conditioning compressor and the gear of air blower in the state of no lubrication, reduce the additional load of engine, reduce the mechanical wear of engine;With the gradual improvement of engine lubrication state, gradually restore the air conditioning operation ability, so as to protect the engine and vehicle electrical system, while taking into account the immediate refrigeration or heating demand of user after vehicle cold start, improve the comfort of vehicle use.

Description

Technical Field

[0001] This invention relates to the field of vehicle control technology, and in particular to a vehicle cold start air conditioning load adaptive control method and vehicle. Background Technology

[0002] Currently, the technical solutions for controlling the air conditioning during cold starts in gasoline-powered vehicles mainly fall into two categories. One type allows the user to turn on the air conditioning at any time after a cold start, with the vehicle only compensating for the load by increasing the idle speed by a fixed amount. The other type prohibits the air conditioning compressor from starting for a period of time after a cold start, allowing only the blower to run, and avoids load surges through a delayed unlocking method.

[0003] The first approach, controlling the air conditioner to run at full load, would cause a sudden increase in engine load, leading to increased mechanical wear, a greater instantaneous discharge current in the battery, shortened battery life, and incomplete fuel combustion, doubling the rate of carbon buildup. The second approach, which disables the compressor by a fixed delay, is prone to either "too short a delay still poses a risk of wear" or "too long a delay fails to meet the user's cooling / heating needs." Therefore, there is an urgent need for a control scheme that can protect the vehicle while meeting the user's immediate cooling / heating needs after a cold start. Summary of the Invention

[0004] This invention provides a vehicle cold start air conditioning load adaptive control method and a vehicle, so as to meet the user's immediate cooling / heating needs after the vehicle is cold started while protecting the vehicle.

[0005] According to one aspect of the present invention, a vehicle cold start air conditioning load adaptive control method is provided, comprising: Obtain the engine oil pressure and start-up time after a cold start of the vehicle; The lubrication status of the engine after a cold start is determined based on the relationship between the oil pressure and the preset pressure threshold, and the relationship between the start-up time and the preset time threshold. The operating status of the vehicle's air conditioning is adjusted according to the lubrication status of the engine.

[0006] Optionally, the lubrication state of the engine after a cold start is determined based on the relationship between the oil pressure and a preset pressure threshold, and the relationship between the start-up duration and a preset duration threshold, including: The lubrication status of the engine is determined based on the relationship between the oil pressure and the first preset pressure threshold and the second preset pressure threshold, or the relationship between the start-up time and the first preset time and the second preset time. The lubrication state of the engine includes: no oil circulation, partial lubrication, and full lubrication; the first preset pressure threshold is less than the second preset pressure threshold; and the first preset duration is less than the second preset duration.

[0007] Optionally, the lubrication state of the engine is determined based on the relationship between the oil pressure and a first preset pressure threshold and a second preset pressure threshold, or the relationship between the start-up duration and a first preset duration and a second preset duration, including: If the oil pressure is less than the first preset pressure threshold, or the start-up time is less than the first preset time, then the engine is determined to be in an oil-uncirculated state. If the oil pressure is greater than or equal to the first preset pressure threshold and less than the second preset pressure threshold, or the start-up time is greater than or equal to the first preset time and less than the second preset time, then the engine is determined to be in a partially lubricated state. If the oil pressure is greater than or equal to the second preset pressure threshold, or the start-up time is greater than or equal to the second preset time, then the engine is determined to be in a fully lubricated state.

[0008] Optionally, adjusting the operating state of the vehicle air conditioner according to the lubrication status of the engine includes: If the engine is in an oil-uncirculated state, adjust the power of the vehicle air conditioner compressor to the first preset power and adjust the blower speed of the vehicle air conditioner to the lowest speed. If the engine is in a partially lubricated state, adjust the power of the vehicle air conditioner compressor to the second preset power, and adjust the blower speed of the vehicle air conditioner to the lowest or second lowest speed. If the engine is in a fully lubricated state, adjust the power of the vehicle air conditioner compressor to the third preset power, and adjust the blower speed of the vehicle air conditioner to a fully adjustable state. Wherein, the first preset power is less than the second preset power, and the second preset power is less than the third preset power.

[0009] Optionally, after determining the lubrication state of the engine after a cold start based on the relationship between the oil pressure and a preset pressure threshold, and the relationship between the start-up duration and a preset duration threshold, the method further includes: The engine speed is adjusted according to the engine's lubrication status.

[0010] Optionally, adjusting the engine speed according to the engine's lubrication condition includes: If the engine is in a state where the engine oil is not circulating, then the engine speed is maintained at the idle speed; If the engine is in a partially lubricated state, the engine speed is increased according to the first speed range; If the engine is in a fully lubricated state, the engine speed is increased according to the second speed range; The second speed range is greater than the first speed range.

[0011] Optionally, before obtaining the oil pressure and start-up time after a cold start of the vehicle, the following steps are also included: Obtain the ambient temperature; The first preset duration and the second preset duration are adjusted according to the ambient temperature.

[0012] Optionally, adjusting the first preset duration and the second preset duration according to the ambient temperature includes: If the ambient temperature is lower than the preset low temperature threshold, the first preset duration and the second preset duration are extended according to the first preset ratio; If the ambient temperature is greater than a preset high temperature threshold, the first preset duration and the second preset duration are shortened according to a second preset ratio. Wherein, the first preset ratio is greater than the second preset ratio.

[0013] Optionally, extending the first preset duration and the second preset duration according to a first preset ratio includes: The extended first preset duration is determined by multiplying the first preset ratio and the first preset duration by the product of the first preset ratio and the first preset duration, and by summing the product of the first preset ratio and the second preset duration, and by summing the product of the first preset ratio and the second preset duration, and by summing the product of the second preset duration. Shortening the first preset duration and the second preset duration according to the second preset ratio includes: The shortened first preset duration is determined by the difference between the product of the second preset ratio and the first preset duration and the first preset duration; the shortened second preset duration is determined by the difference between the product of the second preset ratio and the second preset duration and the first preset duration.

[0014] According to a second aspect of the present invention, a vehicle is provided in which the vehicle engine and air conditioning are controlled by the vehicle cold start air conditioning load adaptive control method described in any one of the first aspects of the present invention.

[0015] The vehicle cold start air conditioning load adaptive control method provided in this invention obtains the engine oil pressure and start-up time after a cold start, and determines the current lubrication state of the engine based on the relationship between the oil pressure and a preset pressure threshold, and the relationship between the start-up time and a preset time threshold. Then, it adjusts the vehicle air conditioning operation state according to the engine lubrication state. Since the lubrication level varies at different times during the engine cold start phase, this solution can dynamically adjust the air conditioning load based on the actual engine lubrication state, rather than using fixed idle speed compensation or fixed delay unlocking methods. Thus, during periods of insufficient engine lubrication, the air conditioning compressor power and blower speed can be reduced, thereby reducing the additional engine load and minimizing engine mechanical wear, instantaneous high-current battery discharge, and carbon buildup caused by incomplete fuel combustion. As the engine lubrication state gradually improves, the air conditioning operation capacity is gradually restored. This protects the engine and vehicle electrical system while also meeting the user's immediate cooling or heating needs after a cold start, improving vehicle comfort and the adaptive capability of the air conditioning control.

[0016] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0018] Figure 1 A flowchart illustrating a vehicle cold start air conditioning load adaptive control method provided in an embodiment of the present invention; Figure 2 A flowchart illustrating another vehicle cold start air conditioning load adaptive control method provided in an embodiment of the present invention; Figure 3 A flowchart illustrating another vehicle cold start air conditioning load adaptive control method provided in an embodiment of the present invention; Figure 4 A flowchart illustrating another vehicle cold start air conditioning load adaptive control method provided in an embodiment of the present invention; Figure 5 A flowchart illustrating another vehicle cold start air conditioning load adaptive control method provided in an embodiment of the present invention; Figure 6A flowchart illustrating another vehicle cold start air conditioning load adaptive control method provided in an embodiment of the present invention; Figure 7 A flowchart illustrating another vehicle cold start air conditioning load adaptive control method provided in an embodiment of the present invention; Figure 8 A flowchart illustrating another vehicle cold start air conditioning load adaptive control method provided in an embodiment of the present invention; Figure 9 This is a flowchart illustrating another vehicle cold start air conditioning load adaptive control method provided in an embodiment of the present invention. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. 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 should fall within the scope of protection of the present invention.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] This invention provides a vehicle cold start air conditioning load adaptive control method. Figure 1 This is a flowchart illustrating a vehicle cold-start air conditioning load adaptive control method according to an embodiment of the present invention. (See attached diagram.) Figure 1 The method includes: S110: Obtain the engine oil pressure and start-up time after a cold start of the vehicle.

[0022] Specifically, a cold start refers to the restarting of a vehicle's engine after it has been off for an extended period. For example, after a vehicle has been parked for a long time, the engine oil temperature drops, and the oil flows back to the oil pan. A stable lubricating film has not yet formed inside the engine; restarting the engine at this time can be called a cold start. Compared to a warm start, the engine experiences greater internal friction and a longer lubrication establishment time during a cold start. Oil pressure refers to the pressure parameter formed by the oil in the engine's lubrication system under the action of the oil pump. Oil pressure reflects the oil circulation status. For example, when the engine is first started, the oil has not yet been fully delivered to all lubrication points, and the oil pressure is relatively low; as the engine continues to run, the oil gradually establishes circulation, and the oil pressure gradually increases. Startup duration refers to the length of time the engine continues to run after ignition. After a cold start, the vehicle's electronic control unit can obtain the current oil pressure through the oil pressure sensor located in the engine's lubrication system and record the engine's running time through a timing module, thus providing a basis for subsequently judging the engine's lubrication status.

[0023] S120. Determine the lubrication status of the engine after a cold start based on the relationship between the oil pressure and the preset pressure threshold, and the relationship between the start-up time and the preset time threshold.

[0024] Specifically, the preset pressure threshold can refer to the oil pressure reference value used to determine the current lubrication level of the engine. The preset pressure threshold can be set differently based on the engine model, oil specification, or lubrication requirements during the engine cold start phase. The preset duration threshold can refer to the time reference value used to determine the degree of oil circulation establishment after a cold start. The preset duration threshold can be set based on the average time required for the engine to establish stable lubrication under different ambient temperatures. The engine's lubrication state refers to the state of oil circulation and lubricating film establishment within the engine, used to characterize the current lubrication level. The vehicle's electronic control unit can compare the acquired oil pressure with the preset pressure threshold and the start-up time with the preset duration threshold to determine the engine's current lubrication state. For example, when the oil pressure is low and the start-up time is short, it can be considered that the oil has not yet fully circulated to all lubrication points of the engine, and the engine is in a state of insufficient lubrication. As the engine continues to run, the oil pressure gradually increases, and the start-up time gradually increases, indicating that a lubricating film is gradually being established within the engine. When the oil pressure reaches a higher level or the start-up time reaches the corresponding duration, it can be considered that the engine has established a relatively stable lubrication state. By combining oil pressure and start-up time for judgment, the accuracy of engine lubrication status identification can be improved, thereby improving the rationality of subsequent air conditioning load control.

[0025] S130. Adjust the operating status of the vehicle's air conditioning according to the engine's lubrication status.

[0026] Specifically, the operating status of a vehicle's air conditioning system can refer to the compressor's operating power, the blower's speed, or other operating parameters related to the air conditioning load. For example, when the engine has just started and is in a stage of insufficient lubrication, the air conditioning compressor's power can be reduced and the blower's speed limited to reduce the additional load on the engine, thereby reducing mechanical wear during the engine's cold start phase and the large current discharge of the battery. As the engine continues to run, the engine oil gradually establishes circulation, and the engine's lubrication gradually improves, the air conditioning compressor's power and the blower's speed can be gradually increased to allow the vehicle's air conditioning system to gradually return to normal operating status.

[0027] The vehicle cold start air conditioning load adaptive control method provided in this invention obtains the engine oil pressure and start-up time after a cold start, and determines the current lubrication state of the engine based on the relationship between the oil pressure and a preset pressure threshold, and the relationship between the start-up time and a preset time threshold. Then, it adjusts the vehicle air conditioning operation state according to the engine lubrication state. Since the lubrication level varies at different times during the engine cold start phase, this solution can dynamically adjust the air conditioning load based on the actual engine lubrication state, rather than using fixed idle speed compensation or fixed delay unlocking methods. Thus, during periods of insufficient engine lubrication, the air conditioning compressor power and blower speed can be reduced, thereby reducing the additional engine load and minimizing engine mechanical wear, instantaneous high-current battery discharge, and carbon buildup caused by incomplete fuel combustion. As the engine lubrication state gradually improves, the air conditioning operation capacity is gradually restored. This protects the engine and vehicle electrical system while also meeting the user's immediate cooling or heating needs after a cold start, improving vehicle comfort and the adaptive capability of the air conditioning control.

[0028] Figure 2 This is a flowchart illustrating another vehicle cold-start air conditioning load adaptive control method provided in an embodiment of the present invention. Optionally, based on the above embodiments, see... Figure 2 The method includes: S210: Obtain the oil pressure and start-up time after a cold start of the vehicle.

[0029] S220. Determine the lubrication status of the engine based on the relationship between the oil pressure and the first preset pressure threshold and the second preset pressure threshold, or the relationship between the start-up time and the first preset time and the second preset time.

[0030] Specifically, the first preset pressure threshold and the second preset pressure threshold can refer to oil pressure reference values ​​used to distinguish different lubrication stages of the engine. The first preset pressure threshold corresponds to the pressure range when the engine oil begins to circulate, and the second preset pressure threshold corresponds to the pressure range when the engine oil has essentially established a stable circulation. Since different stages after a cold start correspond to different degrees of oil circulation, changes in oil pressure can reflect the current lubrication state of the engine. The first preset duration and the second preset duration can refer to time reference values ​​used to distinguish different lubrication stages after a cold start. The first preset duration corresponds to the time range required for the oil to begin circulating, and the second preset duration corresponds to the time range required for the oil to essentially complete circulation and establish a stable lubricating film. In this embodiment, the vehicle's internal electronic control unit can classify and determine the current engine lubrication state based on the relationship between oil pressure and different pressure thresholds, or based on the relationship between start-up duration and different preset durations.

[0031] It should be noted that when either oil pressure or start-up time corresponds to a lower lubrication stage, the engine's current lubrication state can be determined based on this lower lubrication stage. For example, when oil pressure is low, even if the start-up time is relatively long, the engine oil may not have fully established a stable circulation. Similarly, when the start-up time is short, even if the oil pressure has risen, the engine may still be considered to be in the initial stage of a cold start. Therefore, when either oil pressure or start-up time corresponds to a state where the oil is not circulating, the engine can be determined to be in a state where the oil is not circulating. When neither is in a state where the oil is not circulating, but either parameter corresponds to a partial lubrication state, the engine can be determined to be in a partial lubrication state. Only when both oil pressure and start-up time correspond to a fully lubricated state can the engine be determined to be in a fully lubricated state. By prioritizing the lower lubrication stage, the misjudgment that the engine has completed lubrication establishment can be avoided due to a single parameter reaching a threshold prematurely, thereby improving the reliability of lubrication state identification during the engine's cold start phase and enhancing the safety and rationality of subsequent air conditioning load control.

[0032] S230. Adjust the operating status of the vehicle's air conditioning according to the engine's lubrication status.

[0033] Figure 3 This is a flowchart illustrating another vehicle cold-start air conditioning load adaptive control method provided in an embodiment of the present invention. Optionally, based on the above embodiments, see... Figure 3 The method includes: S310: Obtain the oil pressure and start-up time after a cold start of the vehicle.

[0034] S320. If the oil pressure is less than the first preset pressure threshold, or the start-up time is less than the first preset time, then the engine is determined to be in an oil-uncirculated state.

[0035] Specifically, the "oil not circulating" state refers to the state after a cold start where the engine oil has not yet been fully delivered to all lubrication points of the engine. During this stage, a stable lubricating oil film has not yet formed inside the engine, resulting in significant internal friction. In this step, the vehicle's electronic control unit can determine whether the engine is currently in an oil not circulating state by detecting oil pressure and start-up time. For example, when the oil pressure is lower than a first preset pressure threshold, it can be considered that the engine oil has not yet established effective circulation; or when the start-up time is less than a first preset time, it can be considered that the engine is still in the initial stage of a cold start. Since either oil pressure or start-up time meeting the lubrication insufficiency condition may indicate that the engine has not yet established stable lubrication, as long as the oil pressure is lower than the first preset pressure threshold or the start-up time is less than the first preset time, it can be determined that the engine is in an oil not circulating state, thereby preventing the engine from bearing a large air conditioning load during the insufficient lubrication stage.

[0036] S330. If the oil pressure is greater than or equal to the first preset pressure threshold and less than the second preset pressure threshold, or the start-up time is greater than or equal to the first preset time and less than the second preset time, then the engine is determined to be in a partially lubricated state.

[0037] Specifically, partial lubrication refers to the state after a cold start where the engine oil has begun circulating within the engine, but a stable lubricating film has not yet been fully established. In this stage, the lubrication within the engine has improved compared to the state before oil circulation, but a fully stable lubrication state has not yet been achieved. In this step, when the oil pressure reaches or exceeds a first preset pressure threshold but has not yet reached a second preset pressure threshold, it can be considered that the oil has begun circulating, but the lubrication state is still in a transitional phase. Alternatively, when the start-up time reaches or exceeds a first preset time but has not yet reached a second preset time, it can be considered that the engine has moved beyond the initial cold start stage, but the oil circulation is not yet fully stable. Therefore, when either the oil pressure or the start-up time corresponds to a partial lubrication stage, the engine can be determined to be in a partial lubrication state. By dividing the engine lubrication state into partial lubrication states, the air conditioning load can be gradually released as engine lubrication gradually improves, thereby reducing the load impact during the engine cold start phase.

[0038] S340. If the oil pressure is greater than or equal to the second preset pressure threshold, or the start-up time is greater than or equal to the second preset time, then the engine is determined to be in a fully lubricated state.

[0039] Specifically, complete lubrication refers to the state after a cold start where the engine oil has fully circulated to all lubrication points and formed a relatively stable lubricating film. During this stage, internal engine friction is relatively reduced, and engine operation tends to be stable. In this step, when the oil pressure reaches or exceeds a second preset pressure threshold, it can be considered that the engine oil has established a relatively stable circulation. Alternatively, when the start-up time exceeds a second preset time, it can be considered that the engine has run long enough to establish lubrication. Therefore, when the oil pressure and start-up time correspond to the complete lubrication stage, the engine can be considered to be in a complete lubrication state. At this point, the engine has a relatively stable output capacity, allowing the vehicle's air conditioning system to gradually resume higher load operation, thereby protecting the engine while improving the cooling or heating comfort of the vehicle occupants.

[0040] S350: Adjust the vehicle's air conditioning operation according to the engine's lubrication status.

[0041] Figure 4 This is a flowchart illustrating another vehicle cold-start air conditioning load adaptive control method provided in an embodiment of the present invention. Optionally, based on the above embodiments, see... Figure 4 The method includes: S410: Obtain the oil pressure and start-up time after a cold start of the vehicle.

[0042] S420. If the oil pressure is less than the first preset pressure threshold, or the start-up time is less than the first preset time, then the engine is determined to be in an oil-uncirculated state.

[0043] S430. If the oil pressure is greater than or equal to the first preset pressure threshold and less than the second preset pressure threshold, or the start-up time is greater than or equal to the first preset time and less than the second preset time, then the engine is determined to be in a partially lubricated state.

[0044] S440. If the oil pressure is greater than or equal to the second preset pressure threshold, or the start-up time is greater than or equal to the second preset time, then the engine is determined to be in a fully lubricated state.

[0045] S450. If the engine is in a state where the engine oil is not circulating, adjust the power of the vehicle's air conditioning compressor to the first preset power and adjust the vehicle's air conditioning blower to the lowest setting.

[0046] Specifically, the load on a vehicle's air conditioning system is typically determined by the power of the air conditioning compressor and the setting of the blower motor. The compressor is the core component of the air conditioning cycle, primarily responsible for compressing the refrigerant and circulating it within the system. When operating, the compressor compresses the low-temperature, low-pressure refrigerant into a high-temperature, high-pressure refrigerant, which is then delivered to the condenser, evaporator, and other components for heat exchange, thus achieving cooling inside the vehicle. For gasoline-powered vehicles, the air conditioning compressor is usually driven by the engine; therefore, a higher compressor power consumes more engine power and places a greater load on the engine. Especially during cold starts, high compressor power can cause a sudden increase in engine load. The blower motor is the air delivery component in the air conditioning system, primarily used to blow air processed by the evaporator or heating system into the vehicle. A higher blower motor setting results in a larger airflow and a more noticeable cooling or heating effect inside the vehicle. For example, during summer cooling, the blower blows cool air, cooled by the evaporator, into the vehicle; during winter heating, the blower blows warm air, heated by the heater core, into the vehicle. The blower's operation also consumes the vehicle's electrical energy; the higher the setting, the greater the load on the overall air conditioning system. Therefore, the load on the vehicle's air conditioning system can be controlled by adjusting the compressor power and the blower setting.

[0047] The first preset power refers to the lower compressor operating power set during the initial stage of engine cold start to reduce engine load. The lowest setting refers to the lowest airflow setting allowed for the blower. Because the engine is in a state where the oil has not circulated, a stable lubricating oil film has not yet formed inside the engine, resulting in greater internal friction. Therefore, if the air conditioning compressor operates at a higher power, it can easily lead to a sudden increase in engine load, increasing engine mechanical wear, and may also cause an increase in the instantaneous discharge current of the vehicle battery and incomplete fuel combustion. In this step, when the vehicle's electronic control unit determines that the engine is in a state where the oil has not circulated, it can limit the air conditioning compressor to operate at the first preset power and limit the blower to operate only at the lowest setting, thereby reducing the vehicle's air conditioning system's demand on engine output power. By reducing the air conditioning load during the stage before engine lubrication is fully established, the load impact during engine cold start can be reduced, engine wear and battery load can be reduced, while preserving the vehicle's basic cooling or heating capacity to a certain extent.

[0048] S460. If the engine is in a partially lubricated state, adjust the power of the vehicle's air conditioning compressor to the second preset power and adjust the vehicle's air conditioning blower to the lowest or second-lowest setting.

[0049] Specifically, the second preset power can refer to the compressor operating power higher than the first preset power but lower than the third preset power. The next lowest gear can refer to the blower operating gear higher than the lowest gear. Since the engine is in a partially lubricated state, the engine oil has already begun to circulate, and the internal lubrication of the engine is improved compared to the state where the oil is not circulating. Therefore, the engine can withstand a certain degree of air conditioning load. In this step, when the vehicle's electronic control unit determines that the engine is in a partially lubricated state, it can appropriately increase the air conditioning compressor power to the second preset power and allow the blower to operate at the lowest or next lowest gear, thereby gradually increasing the cooling or heating capacity of the vehicle's air conditioning system. By gradually releasing the air conditioning load as the engine lubrication condition gradually improves, it is possible to avoid sudden increases in air conditioning load that could cause engine speed fluctuations or load shocks, while also taking into account the user's needs for vehicle comfort.

[0050] S470. If the engine is fully lubricated, adjust the power of the vehicle's air conditioning compressor to the third preset power and adjust the blower speed of the vehicle's air conditioning to the fully adjustable state.

[0051] Specifically, the third preset power can refer to the compressor operating power corresponding to the normal operating state of the vehicle's air conditioning system. The fully adjustable state means that the blower can freely adjust its operation within multiple speed ranges. Because the engine is fully lubricated, the engine oil has fully circulated to all lubrication points and formed a relatively stable lubricating film, allowing the engine to stably output higher power. In this step, once the vehicle's electronic control unit determines that the engine is fully lubricated, it can adjust the air conditioning compressor power to the third preset power and remove the blower speed restriction, restoring the vehicle's air conditioning system to normal operation. By gradually increasing the air conditioning operating capacity according to the engine lubrication status, the engine and vehicle electrical system can be protected while meeting the user's immediate cooling or heating needs after a cold start, improving the adaptive capability of the vehicle's air conditioning control and user comfort.

[0052] The following specific embodiment illustrates the operation flow of the system, but it is not intended to limit the invention.

[0053] For example, the first preset duration can be 0-30 seconds, the second preset duration can be 30-60 seconds; the first preset pressure threshold can be 80 kPa, the second preset pressure threshold can be 150 kPa; the first preset power is zero, the second preset power is 50% of the rated power, and the third preset power is the rated power.

[0054] When a vehicle has just completed a cold start, if the engine startup time is less than 30 seconds or the oil pressure is below 80 kPa, the vehicle's electronic control unit can determine that the engine is in a state where the oil has not circulated. Since a stable lubricating oil film has not yet been established inside the engine, the electronic control unit can control the air conditioning compressor to operate at a first preset power, that is, turn off the air conditioning compressor, and at the same time limit the blower to operate at the lowest setting, thereby reducing the air conditioning load during the engine cold start phase.

[0055] As the engine continues to run, for example, when the engine startup time is more than 30 seconds but less than 60 seconds, or when the oil pressure reaches more than 80 kPa but less than 150 kPa, the vehicle's electronic control unit can determine that the engine is in a partially lubricated state. At this time, the engine oil has begun to circulate, and the lubrication condition has improved compared to the initial stage of a cold start. Therefore, the electronic control unit can control the air conditioning compressor to operate at a second preset power, that is, to operate at 50% of the compressor's rated power, and allow the blower to operate at the lowest or second-lowest speed, thereby gradually increasing the vehicle's cooling or heating capacity.

[0056] Furthermore, when the engine starts for more than 60 seconds, or the oil pressure reaches more than 150 kPa, the vehicle's electronic control unit can determine that the engine is in a fully lubricated state. At this time, a relatively stable lubricating oil film has formed inside the engine, and the engine's operating state tends to be stable. Therefore, the electronic control unit can control the air conditioning compressor to operate at the third preset power, that is, according to the compressor's rated power, and release the blower motor's speed limit, allowing the blower motor to enter a fully adjustable state, thereby restoring the normal operation of the vehicle's air conditioning system.

[0057] By using the above method, the vehicle's air conditioning load can be adjusted in stages according to the lubrication status at different stages after the engine is cold-started, thereby reducing mechanical wear and load impact during the engine's cold-start phase, while also taking into account the user's immediate cooling or heating needs after the vehicle is cold-started.

[0058] In another implementation, the first preset power is 30% of the rated power, the second preset power is 60% of the rated power, and the third preset power is the rated power. Compared to the control method of completely shutting off the compressor, this implementation allows the air conditioning compressor to operate at a lower power even when the engine is in an oil-uncirculated state. For example, after the vehicle completes a cold start, when the engine is in an oil-uncirculated state, the vehicle's electronic control unit can control the air conditioning compressor to operate at 30% of its rated power and limit the blower to operate at the lowest setting, thereby reducing the engine load while maintaining the vehicle's basic cooling or heating capacity. As the engine lubrication gradually improves, when the engine enters a partially lubricated state, the electronic control unit can further increase the compressor power to 60% of the rated power and allow the blower to operate at the lowest or second-lowest setting to gradually improve in-vehicle comfort. When the engine enters a fully lubricated state, the compressor can be controlled to resume operation at its rated power, and the blower setting restriction can be lifted, allowing the vehicle's air conditioning system to return to normal operation.

[0059] Through the above method, in this embodiment, the power of the air conditioning compressor gradually increases in a small increment during the engine cold start phase. Therefore, compared to the method of directly switching the air conditioning compressor from the off state to higher power operation, it can further reduce the instantaneous impact of air conditioning load changes on the engine, reduce engine speed fluctuations, and improve the smoothness of engine operation during the cold start phase. Simultaneously, because the air conditioning load release is more gradual, it can more precisely match the load capacity corresponding to different lubrication stages of the engine, improving the accuracy of engine protection. This embodiment requires more precise graded control of the compressor power; therefore, the vehicle's internal electronic control unit needs to perform more complex coordinated control of engine lubrication status, compressor power, and air conditioning load changes. Therefore, this embodiment is applicable to high-end fuel vehicles with high requirements for driving comfort and engine protection.

[0060] Figure 5 This is a flowchart illustrating another vehicle cold-start air conditioning load adaptive control method provided in an embodiment of the present invention. Optionally, based on the above embodiments, see... Figure 5 The method includes: S510: Obtain the oil pressure and start-up time after a cold start of the vehicle.

[0061] S520. Determine the lubrication status of the engine based on the relationship between the oil pressure and the first preset pressure threshold and the second preset pressure threshold, or the relationship between the start-up time and the first preset time and the second preset time.

[0062] S530: Adjust the engine speed according to the engine's lubrication status.

[0063] Specifically, engine speed refers to the number of revolutions per unit time of the engine crankshaft, usually expressed in revolutions per minute (RPM). Engine speed affects engine output power and the operating status of engine accessory systems. For example, increasing engine speed increases engine output capacity, as well as the output capacity of the oil pump and the power supply capacity of the alternator. In this embodiment, the vehicle's electronic control unit, after determining the current lubrication state of the engine, can adjust the engine speed according to different lubrication conditions. For example, when the engine lubrication state is poor, the engine can be maintained at a lower speed to reduce internal friction load; as the engine lubrication state gradually improves, the engine speed can be gradually increased, thereby improving engine output capacity and the power supply capacity of the vehicle's electrical system to adapt to the gradually increasing operating load of the vehicle's air conditioning system. By adaptively adjusting the engine speed according to the engine lubrication state, speed fluctuations and load shocks during engine cold starts can be reduced, improving the operational stability of the engine during cold starts.

[0064] Figure 6 This is a flowchart illustrating another vehicle cold-start air conditioning load adaptive control method provided in an embodiment of the present invention. Optionally, based on the above embodiments, see... Figure 6 The method includes: S610: Obtain the oil pressure and start-up time after a cold start of the vehicle.

[0065] S620. Determine the lubrication status of the engine based on the relationship between the oil pressure and the first preset pressure threshold and the second preset pressure threshold, or the relationship between the start-up time and the first preset time and the second preset time.

[0066] S630: If the engine is in a state where the engine oil is not circulating, the engine speed will be kept at idle speed.

[0067] Specifically, idle speed refers to the base speed at which the engine maintains stable operation when the vehicle has no additional power output demand. For example, when the vehicle is stationary and the accelerator pedal is not depressed, the engine typically runs at idle speed. Because the engine is in a state where the oil is not circulating, the oil has not been fully delivered to all lubrication points, and a stable lubricating oil film has not yet formed inside the engine. Therefore, the internal friction resistance of the engine is relatively high. In this step, when the vehicle's electronic control unit determines that the engine is in a state where the oil is not circulating, it can control the engine to maintain idle speed, thereby preventing the engine from entering a high-speed operating state during the insufficient lubrication stage. By limiting the engine speed during the stage before engine lubrication is fully established, internal mechanical wear and operating load during the cold start stage can be reduced, improving the protection effect during the cold start stage.

[0068] S640. If the engine is in a partially lubricated state, increase the engine speed according to the first speed range.

[0069] Specifically, the first speed range refers to the engine speed adjustment range that is higher than the idle speed but lower than the speed range corresponding to the fully lubricated state. Since the engine is in a partially lubricated state, the engine oil has already begun circulating inside the engine, and the lubrication condition inside the engine is improved compared to the state where the oil is not circulating. Therefore, the engine can withstand a certain degree of load increase. In this step, once the vehicle's electronic control unit determines that the engine is in a partially lubricated state, the engine speed can be appropriately increased according to the first speed range based on the idle speed. For example, a preset speed value can be increased from the original idle speed to improve the engine's output and power generation capabilities, adapting to the gradually increasing operating load of the vehicle's air conditioning system. By gradually increasing the engine speed as the engine lubrication condition gradually improves, speed fluctuations caused by sudden changes in engine load can be reduced, improving the smoothness of vehicle operation during cold starts.

[0070] S650: If the engine is fully lubricated, increase the engine speed according to the second speed range.

[0071] Specifically, the second speed range refers to the higher speed adjustment range corresponding to the engine being in a fully lubricated state. Because the engine oil has fully circulated to all lubrication points and formed a relatively stable lubricating film when the engine is fully lubricated, the engine can stably output higher power. In this step, once the vehicle's electronic control unit determines that the engine is in a fully lubricated state, it can further increase the engine speed according to the second speed range, thereby increasing the engine's output capacity to meet the load requirements of the vehicle's air conditioning system during normal operation. Since the second speed range is larger than the first speed range, the engine can provide higher output capacity in a fully lubricated state, thus ensuring the stable operation of the vehicle's air conditioning system while also considering the engine protection needs during cold starts and the user's comfort needs.

[0072] The following specific embodiment illustrates the operation flow of the system, but it is not intended to limit the invention.

[0073] For example, the first speed range can be 50-80 rpm, and the second speed range can be 80-150 rpm.

[0074] When the engine is not in an oil circulation state, the vehicle's electronic control unit can control the engine to maintain an idle speed. For example, the engine can maintain a base idle speed of 700 rpm, thus preventing the engine from reaching higher speeds when lubrication is insufficient, reducing internal mechanical wear and operating load during cold starts. At the same time, the vehicle's air conditioning system can operate at a low load to reduce additional engine load.

[0075] As the engine continues to run, the engine oil gradually establishes its circulation. For example, when the oil pressure reaches a first preset pressure threshold and the start-up time reaches a first preset duration, the vehicle's electronic control unit (ECU) can determine that the engine has entered a partially lubricated state. At this time, the ECU can increase the engine speed according to a first speed range. For example, from the original 700 rpm idle speed, it can be increased by 50-80 rpm, raising the engine speed to 750-780 rpm, thereby improving the engine's output capacity and the vehicle's power generation capacity to adapt to the gradually increasing operating load of the vehicle's air conditioning system.

[0076] Furthermore, as the engine continues to run, the engine oil has fully circulated to all lubrication points and established a stable lubricating film. For example, when the oil pressure reaches or exceeds a second preset pressure threshold and the start-up time reaches a second preset duration, the vehicle's electronic control unit can determine that the engine has entered a fully lubricated state. At this time, the vehicle's electronic control unit can further increase the engine speed according to a second speed range. For example, it can increase the engine speed by 80-150 rpm from the original idle speed, raising the engine speed to 780-850 rpm, thereby increasing the engine's output capacity to meet the load requirements of the vehicle's air conditioning system during normal operation.

[0077] By using the above method, the engine speed can be adjusted in stages according to different lubrication stages of the engine, thereby reducing the load impact and speed fluctuation during the cold start stage of the engine, improving the operational stability of the engine during the cold start stage, and taking into account the comfort requirements of the vehicle's air conditioning system.

[0078] In one alternative implementation, the engine speed regulation can also be coordinated with the vehicle's air conditioning load regulation. Specifically, the vehicle's electronic control unit can adjust the air conditioning compressor power and blower speed based on the engine lubrication status, while simultaneously adjusting the engine speed. For example, when the engine is in an oil-uncirculated state, the engine speed can be maintained at idle speed while limiting the low-power operation of the air conditioning compressor or shutting it off, thereby reducing the overall operating load during the engine's cold start phase. When the engine enters a partially lubricated state, the engine speed can be increased according to a first speed range while increasing the air conditioning compressor power and blower speed to compensate for the increased engine output demand caused by the increased air conditioning load. When the engine enters a fully lubricated state, the engine speed can be further increased according to a second speed range while restoring the normal operation of the air conditioning system, thereby improving the engine's output capacity and power generation capacity.

[0079] The present invention achieves coordinated control of engine speed regulation and air conditioning load regulation, enabling the engine output capacity to match changes in air conditioning load. This reduces engine speed fluctuations and load shocks caused by sudden changes in air conditioning load, improving the operational stability of the engine during cold starts. Simultaneously, it also reduces mechanical wear during engine cold starts and the instantaneous discharge load on the vehicle battery, improving vehicle comfort and engine protection during cold starts.

[0080] Figure 7 This is a flowchart illustrating another vehicle cold-start air conditioning load adaptive control method provided in an embodiment of the present invention. Optionally, based on the above embodiments, see... Figure 7 The method includes: S710, Obtain ambient temperature.

[0081] Specifically, ambient temperature refers to the outside air temperature in the vehicle's current environment. Ambient temperature can be obtained through a temperature sensor installed on the vehicle. Because ambient temperature affects engine oil viscosity and flowability, the time required for the engine to establish a lubrication cycle varies under different ambient temperatures. For example, in low-temperature environments, oil viscosity is higher, and the oil circulation speed is slower; in high-temperature environments, oil flow is better, and the oil circulation establishment speed is faster. The vehicle's electronic control unit can obtain the current ambient temperature before or during a cold start, thus providing a basis for subsequently adjusting engine lubrication condition parameters.

[0082] S720: Adjust the first preset duration and the second preset duration according to the ambient temperature.

[0083] Specifically, the first and second preset durations can be used as time reference values ​​to determine different lubrication stages of the engine. Since the time required for the engine to establish a lubrication cycle varies under different ambient temperatures, the first and second preset durations can be adjusted according to the ambient temperature. For example, in low-temperature environments, the corresponding preset duration can be appropriately extended to prevent the engine from entering a high-load operating state prematurely before the engine oil has fully circulated; in high-temperature environments, the corresponding preset duration can be appropriately shortened to improve the response speed of the vehicle's air conditioning system. In this step, the vehicle's internal electronic control unit can adaptively adjust the first and second preset durations according to the current ambient temperature, thereby improving the accuracy of engine lubrication status identification and the rationality of air conditioning load control during the vehicle's cold start phase.

[0084] S730: Obtain the oil pressure and start-up time after a cold start of the vehicle.

[0085] S740. Determine the lubrication status of the engine based on the relationship between the oil pressure and the first preset pressure threshold and the second preset pressure threshold, or the relationship between the start-up time and the first preset time and the second preset time.

[0086] S750: Adjust the vehicle's air conditioning operation according to the engine's lubrication status.

[0087] Figure 8 This is a flowchart illustrating another vehicle cold-start air conditioning load adaptive control method provided in an embodiment of the present invention. Optionally, based on the above embodiments, see... Figure 8 The method includes: S810, Obtain ambient temperature.

[0088] S820. If the ambient temperature is lower than the preset low temperature threshold, the first preset duration and the second preset duration shall be extended according to the first preset ratio.

[0089] Specifically, the preset low-temperature threshold can refer to a temperature reference value used to determine whether the vehicle is in a low-temperature environment. When the ambient temperature is lower than the preset low-temperature threshold, the engine can be considered to be in a low-temperature cold start environment. The first preset ratio can refer to the adjustment ratio used to extend the first preset duration and the second preset duration. Because the viscosity of engine oil is higher in low-temperature environments, it takes longer for the engine to establish a stable lubrication cycle. Therefore, the corresponding lubrication status determination time can be appropriately extended. In this step, when the electronic control unit inside the vehicle detects that the ambient temperature is lower than the preset low-temperature threshold, it can extend the first preset duration and the second preset duration according to the first preset ratio, thereby extending the lubrication protection time during the engine cold start phase and preventing the engine from entering a high air conditioning load operation state before lubrication is fully established.

[0090] S830. If the ambient temperature is greater than the preset high temperature threshold, the first preset duration and the second preset duration shall be shortened according to the second preset ratio.

[0091] Specifically, the preset high-temperature threshold can refer to a temperature reference value used to determine whether the vehicle is in a high-temperature environment. The second preset ratio can refer to the adjustment ratio used to shorten the first preset duration and the second preset duration. Because engine oil flows better in high-temperature environments, the engine establishes a lubrication cycle faster; therefore, the lubrication status determination time can be appropriately shortened. In this step, when the vehicle's electronic control unit detects that the ambient temperature is higher than the preset high-temperature threshold, the first preset duration and the second preset duration can be shortened according to the second preset ratio, thereby shortening the air conditioning load limiting time during the engine cold start phase and improving the response speed of the vehicle's air conditioning system and user comfort. Because low-temperature environments have a more significant impact on engine lubrication, the first preset ratio can be greater than the second preset ratio to improve the engine protection effect in low-temperature environments.

[0092] S840: Obtain the oil pressure and start-up time after a cold start of the vehicle.

[0093] S850: Determine the lubrication status of the engine based on the relationship between the oil pressure and the first preset pressure threshold and the second preset pressure threshold, or the relationship between the start-up time and the first preset time and the second preset time.

[0094] S860: Adjust the vehicle air conditioning operation according to the engine lubrication status.

[0095] Figure 9 This is a flowchart illustrating another vehicle cold-start air conditioning load adaptive control method provided in an embodiment of the present invention. Optionally, based on the above embodiments, see... Figure 9 The method includes: S910, Obtain ambient temperature.

[0096] S920. If the ambient temperature is less than the preset low temperature threshold, the extended first preset duration is determined by the product of the first preset ratio and the first preset duration and the sum of the first preset duration; the extended second preset duration is determined by the product of the first preset ratio and the second preset duration and the sum of the second preset duration.

[0097] Specifically, the vehicle's internal electronic control unit can adjust the lubrication status determination time in low-temperature environments using a proportional calculation method. For example, the extended first preset time can be determined by the formula "original first preset time + original first preset time × first preset ratio"; similarly, the extended second preset time can be determined by the formula "original second preset time + original second preset time × first preset ratio". Through this method, the engine lubrication build-up time can be dynamically compensated based on the ambient temperature, thereby improving the accuracy of engine lubrication status identification in low-temperature environments.

[0098] S930. If the ambient temperature is greater than the preset high temperature threshold, the shortened first preset duration is determined by the difference between the product of the second preset ratio and the first preset duration and the first preset duration; the shortened second preset duration is determined by the difference between the product of the second preset ratio and the second preset duration and the first preset duration.

[0099] Specifically, the vehicle's internal electronic control unit can adjust the lubrication status determination time under high-temperature conditions using a proportional calculation method. For example, the shortened first preset time can be determined by the formula "original first preset time - original first preset time × second preset ratio"; similarly, the shortened second preset time can be determined by the formula "original second preset time - original second preset time × second preset ratio". This method ensures effective engine lubrication protection while reducing the air conditioning load limiting time under high-temperature conditions, thereby improving the response efficiency of the vehicle's air conditioning system and user comfort.

[0100] S940: Obtain the oil pressure and start-up time after a cold start of the vehicle.

[0101] S950. Determine the lubrication status of the engine based on the relationship between the oil pressure and the first preset pressure threshold and the second preset pressure threshold, or the relationship between the start-up time and the first preset time and the second preset time.

[0102] S960. Adjust the vehicle air conditioning operation according to the engine lubrication status.

[0103] The following specific embodiment illustrates the operation flow of the system, but it is not intended to limit the invention.

[0104] For example, the first preset duration can be 0-30 seconds, and the second preset duration can be 30-60 seconds; the first preset ratio can be 50%, and the second preset ratio can be 30%; the preset low temperature threshold is -10℃, and the preset high temperature threshold is 30℃. Before the vehicle starts, the electronic control unit inside the vehicle can first obtain the current ambient temperature of the vehicle, and adjust the first preset duration and the second preset duration according to the ambient temperature.

[0105] For example, when the current ambient temperature is -15℃, since the ambient temperature is below the preset low-temperature threshold of -10℃, the vehicle's electronic control unit can extend the first preset duration and the second preset duration according to a first preset ratio. For instance, if the original first preset duration was 30 seconds, it can be extended by 50%, resulting in an extended first preset duration of 45 seconds; if the original second preset duration was 60 seconds, it can be extended by 50%, resulting in an extended second preset duration of 90 seconds. At this time, the vehicle's electronic control unit can determine the engine lubrication status according to the adjusted time range.

[0106] After the vehicle starts, the electronic control unit inside the vehicle can obtain real-time information on the engine oil pressure and start-up time. For example, if the engine start-up time is less than 45 seconds, it can be determined that the engine is in a state where the oil has not circulated. At this time, the vehicle's air conditioning system can operate at a low load to reduce the operating load during the engine's cold start phase. If the engine start-up time is more than 45 seconds but less than 90 seconds, it can be determined that the engine is in a partially lubricated state. At this time, the vehicle's air conditioning system can gradually increase the compressor power and blower speed. If the engine start-up time is more than 90 seconds, it can be determined that the engine is in a fully lubricated state. At this time, the vehicle's air conditioning system can resume normal operation. Through the above methods, the lubrication protection time during the engine's cold start phase in low-temperature environments can be extended, thereby reducing engine mechanical wear and air conditioning load impact in low-temperature environments.

[0107] Furthermore, for example, when the current ambient temperature of the vehicle is 35°C, since the ambient temperature is higher than the preset high temperature threshold of 30°C, the electronic control unit inside the vehicle can shorten the first preset duration and the second preset duration according to a second preset ratio. For example, if the original first preset duration was 30 seconds, it can be shortened by 30%, resulting in a shortened first preset duration of 21 seconds; if the original second preset duration was 60 seconds, it can be shortened by 30%, resulting in a shortened second preset duration of 42 seconds.

[0108] After the vehicle starts, the electronic control unit inside the vehicle can determine the engine lubrication status according to an adjusted time range. For example, if the engine starts for less than 21 seconds, it can be determined that the engine is in a state where the oil has not circulated; if the engine starts for more than 21 seconds but less than 42 seconds, it can be determined that the engine is in a state of partial lubrication; and if the engine starts for more than 42 seconds, it can be determined that the engine is in a state of full lubrication. Because engine oil flows better at high temperatures, shortening the lubrication status determination time can reduce the air conditioning load limiting time, improve the response speed of the vehicle's air conditioning system, and enhance the user's comfort when cooling or heating.

[0109] By employing the above methods, the time range for determining the engine lubrication status can be dynamically adjusted according to different ambient temperatures. This improves the accuracy of engine lubrication status identification under varying ambient temperatures, enhances the rationality of air conditioning load control during vehicle cold starts, and improves engine protection effectiveness. This invention also provides a vehicle that uses the vehicle cold start air conditioning load adaptive control method provided in any of the above embodiments to control the vehicle engine and air conditioning. After the vehicle provided in this invention uses the vehicle cold start air conditioning load adaptive control method provided in any of the above embodiments to control the vehicle engine and air conditioning, in some implementation scenarios, the wear of moving parts of the engine can be reduced by more than 60% during cold starts, the cylinder wall wear of a 3-year-old engine can be reduced from 0.3mm to below 0.12mm, carbon deposit formation can be reduced by 50%, and the engine service life can be extended by 3-5 years; when the air conditioning is turned on during a cold start, the instantaneous discharge current of the battery drops from 180A to below 100A (below the rated value of 120A), and the battery cycle life is extended by 20%-30%. This reduces the frequency of battery replacements; it shortens the waiting time for cooling in high-temperature environments from 120 seconds to 42 seconds, and the waiting time for heating in low-temperature environments from 180 seconds to 90 seconds, while avoiding the cabin stuffiness / coldness problems caused by excessive delays in existing solutions; and through an idle speed compensation strategy, it reduces the engine idle speed fluctuation range from ±50rpm to ±15rpm when the air conditioner is turned on, eliminating engine vibration during cold starts; it also reduces carbon buildup, lowers fuel consumption by 0.3-0.5L per 100km, and reduces the annual operating cost for users by 200-300 yuan due to the reduced frequency of battery replacements.

[0110] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0111] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A vehicle cold start air conditioning load adaptive control method, characterized in that, include: Obtain the engine oil pressure and start-up time after a cold start of the vehicle; The lubrication status of the engine after a cold start is determined based on the relationship between the oil pressure and the preset pressure threshold, and the relationship between the start-up time and the preset time threshold. The operating status of the vehicle's air conditioning is adjusted according to the lubrication status of the engine.

2. The vehicle cold start air conditioning load adaptive control method according to claim 1, characterized in that, The lubrication status of the engine after a cold start is determined based on the relationship between the oil pressure and a preset pressure threshold, and the relationship between the start-up duration and a preset duration threshold, including: The lubrication status of the engine is determined based on the relationship between the oil pressure and the first preset pressure threshold and the second preset pressure threshold, or the relationship between the start-up time and the first preset time and the second preset time. The lubrication state of the engine includes: no oil circulation, partial lubrication, and full lubrication; the first preset pressure threshold is less than the second preset pressure threshold; and the first preset duration is less than the second preset duration.

3. The vehicle cold start air conditioning load adaptive control method according to claim 2, characterized in that, The lubrication state of the engine is determined based on the relationship between the oil pressure and a first preset pressure threshold and a second preset pressure threshold, or the relationship between the start-up duration and a first preset duration and a second preset duration, including: If the oil pressure is less than the first preset pressure threshold, or the start-up time is less than the first preset time, then the engine is determined to be in an oil-uncirculated state. If the oil pressure is greater than or equal to the first preset pressure threshold and less than the second preset pressure threshold, or the start-up time is greater than or equal to the first preset time and less than the second preset time, then the engine is determined to be in a partially lubricated state. If the oil pressure is greater than or equal to the second preset pressure threshold, or the start-up time is greater than or equal to the second preset time, then the engine is determined to be in a fully lubricated state.

4. The vehicle cold start air conditioning load adaptive control method according to claim 2, characterized in that, Adjusting the operating status of the vehicle air conditioner according to the lubrication status of the engine includes: If the engine is in an oil-uncirculated state, adjust the power of the vehicle air conditioner compressor to the first preset power and adjust the blower speed of the vehicle air conditioner to the lowest speed. If the engine is in a partially lubricated state, adjust the power of the vehicle air conditioner compressor to the second preset power, and adjust the blower speed of the vehicle air conditioner to the lowest or second lowest speed. If the engine is in a fully lubricated state, adjust the power of the vehicle air conditioner compressor to the third preset power, and adjust the blower speed of the vehicle air conditioner to a fully adjustable state. Wherein, the first preset power is less than the second preset power, and the second preset power is less than the third preset power.

5. The vehicle cold start air conditioning load adaptive control method according to claim 2, characterized in that, After determining the engine lubrication state after a cold start based on the relationship between the oil pressure and a preset pressure threshold, and the relationship between the start-up duration and a preset duration threshold, the process further includes: The engine speed is adjusted according to the engine's lubrication status.

6. The vehicle cold start air conditioning load adaptive control method according to claim 5, characterized in that, Adjusting the engine speed according to the engine's lubrication condition includes: If the engine is in a state where the engine oil is not circulating, then the engine speed is maintained at the idle speed; If the engine is in a partially lubricated state, the engine speed is increased according to the first speed range; If the engine is in a fully lubricated state, the engine speed is increased according to the second speed range; The second speed range is greater than the first speed range.

7. The vehicle cold start air conditioning load adaptive control method according to claim 2, characterized in that, Before obtaining the oil pressure and start-up time after a cold start of the vehicle, the following is also included: Obtain the ambient temperature; The first preset duration and the second preset duration are adjusted according to the ambient temperature.

8. The vehicle cold start air conditioning load adaptive control method according to claim 7, characterized in that, Adjusting the first preset duration and the second preset duration according to the ambient temperature includes: If the ambient temperature is lower than a preset low temperature threshold, the first preset duration and the second preset duration are extended according to a first preset ratio. If the ambient temperature is greater than a preset high temperature threshold, the first preset duration and the second preset duration are shortened according to a second preset ratio. Wherein, the first preset ratio is greater than the second preset ratio.

9. The vehicle cold start air conditioning load adaptive control method according to claim 8, characterized in that, Extending the first preset duration and the second preset duration according to the first preset ratio includes: The extended first preset duration is determined by multiplying the first preset ratio and the first preset duration by the product of the first preset ratio and the first preset duration, and by summing the product of the first preset ratio and the second preset duration, and by summing the product of the first preset ratio and the second preset duration, and by summing the product of the second preset duration. Shortening the first preset duration and the second preset duration according to the second preset ratio includes: The shortened first preset duration is determined by the difference between the product of the second preset ratio and the first preset duration and the first preset duration; the shortened second preset duration is determined by the difference between the product of the second preset ratio and the second preset duration and the first preset duration.

10. A vehicle, characterized in that, The vehicle engine and air conditioning are controlled using the vehicle cold start air conditioning load adaptive control method described in claims 1-9.

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