Methods, devices, storage media and systems for determining engine power

Abstract

This invention provides a method, apparatus, storage medium, and system for determining engine power. The method includes acquiring the initial target power of the engine, determining the initial operating condition of the engine based on the correspondence between the initial target power and the engine's operating conditions, and if the initial operating condition is determined to be abnormal based on the circulating oil volume, then a new initial operating condition in a normal state is determined and marked as the target operating condition, and the engine is controlled to operate with the target power corresponding to the target operating condition. Specifically, when the initial operating condition is normal, the hydrocarbon content is less than a set content; when the initial operating condition is abnormal, the hydrocarbon content is greater than or equal to the set content. This invention solves the problem of black smoke emitted by the engine due to incomplete combustion at low temperatures caused by relying solely on battery SOC to determine power generation in existing technologies.

Description

Technical Field

[0001] This application relates to the field of engine technology, and more specifically, to a method, apparatus, storage medium, and system for determining engine power. Background Technology

[0002] The existing range extender control strategy mainly determines the power generation based on the battery's state of charge (SOC). In cold regions, if the load is increased rapidly after starting, the engine may produce black smoke due to incomplete combustion at low temperatures. This not only affects vehicle performance but may also cause engine damage due to abnormal combustion. Summary of the Invention

[0003] The main objective of this invention is to provide a method, apparatus, storage medium, and system for determining engine power, in order to solve the problem of black smoke caused by incomplete combustion at low temperatures in engines, which is a consequence of relying solely on battery SOC to determine power generation in the prior art.

[0004] To achieve the above objectives, according to one aspect of the present invention, a method for determining the power of an engine is provided, the method comprising:

[0005] The initial target power of the engine is obtained, and the initial operating conditions of the engine are determined based on the correspondence between the initial target power and the engine's operating conditions. The operating conditions include the engine's circulating oil volume, which is used to characterize the content of hydrocarbons in the engine exhaust.

[0006] If the initial operating condition is determined to be abnormal based on the circulating oil volume, a new initial operating condition that is in a normal state is determined and marked as the target operating condition. The engine is then controlled to operate with the target power corresponding to this target operating condition. When the initial operating condition is normal, the hydrocarbon content is less than the set content. When the initial operating condition is abnormal, the hydrocarbon content is greater than or equal to the set content.

[0007] Furthermore, the determination method also includes marking the initial operating condition as the target operating condition if it is determined to be a normal state, and controlling the engine to operate at the initial target power corresponding to the target operating condition.

[0008] Furthermore, the steps for determining the initial operating conditions of the engine based on the correspondence between the target power and the engine's operating conditions include:

[0009] Traverse the power status table, which includes multiple raw power values, as well as the raw speed and raw circulating oil quantity corresponding to each raw power value;

[0010] Determine the original power corresponding to the target power;

[0011] The initial operating conditions are determined based on the correspondence between the original power, the original speed, and the original circulating oil volume.

[0012] Furthermore, the steps for determining that the initial operating condition is normal include:

[0013] Compare the relationship between the hydrocarbon content and the set content;

[0014] When the hydrocarbon content is less than the set content, the initial operating condition is determined to be normal; and / or,

[0015] Compare the relationship between the hydrocarbon content and the set content;

[0016] When the hydrocarbon content is greater than or equal to the set content, the initial operating condition is determined to be abnormal.

[0017] Furthermore, the steps for re-determining the initial operating conditions in a normal state include:

[0018] Traverse the power status table again, identify the original circulating oil quantity that is less than the set content among the multiple original circulating oil quantities in the power status table, and mark it as the target circulating oil quantity;

[0019] Based on the correspondence between the original circulating oil volume, the original speed, and the original power, determine the original speed and original power corresponding to the target circulating oil volume, and mark them as the target speed and target power;

[0020] Control engine operation based on target speed and target power.

[0021] Furthermore, the operating condition also includes the engine speed. After the step of re-determining the initial operating condition in a normal state, and before the step of controlling the engine operation with the target power corresponding to the target operating condition, the determination method further includes:

[0022] Control the engine to switch from the current speed to the target speed corresponding to the target power by a set step size; and / or control the engine to switch from the current power to the target power by a set step size.

[0023] Furthermore, after the step of controlling engine operation with the target power corresponding to the target operating condition, the following is also included:

[0024] Obtain the engine's real-time coolant temperature;

[0025] When the real-time water temperature reaches the set temperature, the engine is controlled to run at the initial target power and the target speed corresponding to the initial target power.

[0026] According to another aspect of the present invention, an engine power determination device is provided, comprising:

[0027] The acquisition unit is used to acquire the initial target power of the engine, so as to determine the initial operating conditions of the engine based on the correspondence between the initial target power and the engine operating conditions. The operating conditions include the circulating oil volume of the engine, which is used to characterize the content of hydrocarbons in the engine exhaust.

[0028] The first processing unit is used to determine the initial operating condition as normal when the initial operating condition is determined to be abnormal based on the circulating oil quantity, and mark it as the target operating condition, and control the engine operation with the target power corresponding to the target operating condition.

[0029] Specifically, when the initial operating condition is normal, the hydrocarbon content is less than the set content; when the initial operating condition is abnormal, the hydrocarbon content is greater than or equal to the set content.

[0030] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium comprising a stored program, wherein the program executes the above-described method when it is run.

[0031] According to another aspect of the present invention, an engine system is provided, including an engine and a controller, wherein the controller communicates with the engine and is used to perform the method described above.

[0032] By applying the technical solution of this invention, the initial target power of the range extender under low-temperature and cold-region operating conditions is corrected and limited based on the correspondence between the hydrocarbon (HC) content in engine exhaust and the circulating oil volume. This effectively avoids the black smoke phenomenon caused by incomplete combustion of the engine at low temperatures. The technical solution of this application automatically identifies and avoids abnormal operating conditions with high hydrocarbon (HC) emissions, adjusting the engine's operating point to meet normal conditions. This not only prevents the risk of engine damage caused by abnormal combustion, but also ensures the stable operation performance of the range extender in extreme environments, achieving a balance between power output and emission control. Attached Figure Description

[0033] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0034] Figure 1 A flowchart illustrating an engine power determination method according to an embodiment of this application is shown. Detailed Implementation

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] The existing range extender control strategy mainly determines the power generation based on the battery's state of charge (SOC). In cold regions with low temperatures, if the load is increased rapidly after starting, the engine may produce black smoke due to incomplete combustion at low temperatures. This not only affects vehicle performance but may also cause engine protection issues due to abnormal combustion.

[0037] Therefore, the main objective of this technical solution is to provide a method, device, storage medium, and system for determining engine power to address the above problems.

[0038] First, embodiments of this application provide a method for determining the power of an engine, such as... Figure 1 As shown, the power determination method includes the following steps:

[0039] S1. Obtain the initial target power of the engine, and determine the initial operating conditions of the engine based on the correspondence between the initial target power and the engine's operating conditions. The operating conditions include the engine's circulating oil volume, which is used to characterize the content of hydrocarbons in the engine exhaust.

[0040] S2. If the initial operating condition is determined to be abnormal based on the circulating oil quantity, the initial operating condition that is in a normal state is re-determined and marked as the target operating condition. The engine is then controlled to operate with the target power corresponding to the target operating condition.

[0041] Specifically, when the initial operating condition is normal, the hydrocarbon content is less than the set content; when the initial operating condition is abnormal, the hydrocarbon content is greater than or equal to the set content.

[0042] Specifically, when the vehicle is powered on, the vehicle control unit sends the initial target power to the range extender control unit. If the range extender control unit directly controls the vehicle's operation based on this initial target power, in low-temperature environments, incomplete combustion at low temperatures could lead to black smoke from the engine. This would not only affect vehicle performance but could also damage the engine due to abnormal combustion. Therefore, in this technical solution, the range extender control unit, upon receiving the initial target power, determines the engine's initial operating conditions based on the correspondence between the initial target power and the engine's operating conditions. The engine's operating conditions include the engine's circulating oil volume, which characterizes the hydrocarbon content in the engine exhaust. Once the initial operating conditions corresponding to the initial target power are determined, a corresponding value can be obtained. The corresponding circulating oil volume is used. When the initial operating condition is determined to be abnormal based on the circulating oil volume (i.e., smoke occurs after the engine is controlled to run at the initial target power), it is necessary to redetermine the initial operating condition to a normal state. Then, this initial operating condition is marked as the target operating condition, and the target power corresponding to this target operating condition is found. The engine is controlled to run at this target power. This ensures that after the engine is controlled to run at the target power, the engine will not emit black smoke due to incomplete combustion at low temperatures. When the initial operating condition is abnormal, the hydrocarbon content is greater than or equal to the set content. When the initial operating condition is normal, the hydrocarbon content is less than the set content. It should be noted that this technical solution does not limit the specific value of the set content, and its specific value can be changed according to the actual application.

[0043] The technical solution provided in this application, by correcting and limiting the initial target power of the range extender under low-temperature cold-region operating conditions based on the correspondence between the hydrocarbon (HC) content in engine exhaust and the circulating oil volume, can effectively avoid the black smoke phenomenon caused by incomplete combustion of the engine at low temperatures. The technical solution of this application automatically identifies and avoids abnormal operating conditions with high hydrocarbon (HC) emissions, and adjusts the engine operating point to meet the normal state. This not only prevents the risk of engine damage caused by abnormal combustion, but also ensures the stable operation performance of the range extender in extreme environments, and achieves a balance between power output and emission control.

[0044] Furthermore, the power determination method also includes marking the initial operating condition as the target operating condition if it is determined that the initial operating condition is normal, and controlling the engine to operate at the initial target power corresponding to the target operating condition.

[0045] Specifically, when the initial operating condition is determined to be normal based on the circulating oil volume (that is, the engine will not produce smoke after being controlled to run at the initial target power), the initial operating condition is marked as the target operating condition, and the engine is controlled to run at the initial target power corresponding to the target operating condition.

[0046] This application embodiment determines that the hydrocarbon content corresponding to the initial operating condition is lower than a set threshold. After confirming that it is a normal state, it is directly marked as the target operating condition and the engine is controlled to run at the initial target power. In this way, while ensuring that the engine does not emit black smoke and there is no risk of abnormal combustion, the original power demand of the vehicle is preserved to the greatest extent, unnecessary power attenuation is avoided, and the response efficiency of the range extender in low temperature environment and the smoothness and power of the vehicle driving are improved.

[0047] Furthermore, the steps for determining the initial operating conditions of the engine based on the correspondence between the target power and the engine's operating conditions include:

[0048] Traverse the power status table, which includes multiple raw power values, as well as the raw speed and raw circulating oil quantity corresponding to each raw power value;

[0049] Determine the original power corresponding to the target power;

[0050] The initial operating conditions are determined based on the correspondence between the original power, the original speed, and the original circulating oil volume.

[0051] Furthermore, the steps for re-determining the initial operating conditions in a normal state include:

[0052] Traverse the power status table again, identify the original circulating oil quantity that is less than the set content among the multiple original circulating oil quantities in the power status table, and mark it as the target circulating oil quantity;

[0053] Based on the correspondence between the original circulating oil volume, the original speed, and the original power, determine the original speed and original power corresponding to the target circulating oil volume, and mark them as the target speed and target power;

[0054] Control engine operation based on target speed and target power.

[0055] Specifically, before traversing the power state table, it needs to be established. The steps for establishing the power state table include obtaining multiple raw power values ​​of the engine, and for each raw power value, the corresponding raw speed and raw circulating oil volume, to form the power state table. After the range extender controller receives the initial target power from the vehicle control unit, it needs to traverse the power state table based on this initial target power to determine the raw power corresponding to it. Then, based on the correspondence between the raw power, raw speed, and raw circulating oil volume, it can determine the original target speed and raw circulating oil volume corresponding to the initial target power. Finally, it judges the raw circulating oil volume, and when the raw circulating oil volume... When the value is less than the set content, it indicates that the engine will not emit black smoke when running at the initial target power and its corresponding original target speed. When the value of the original circulating oil volume is greater than or equal to the set content, it indicates that the engine will emit black smoke when running at the initial target power and its corresponding original target speed. In this case, it is necessary to traverse the power status table again to find the original circulating oil volume that is less than the set content and mark it as the target circulating oil volume. Then, based on the correspondence between the original circulating oil volume, the original speed, and the original power, the target speed and target power corresponding to the target circulating oil volume can be determined. Thus, the engine can be controlled to run at the target speed and target power without emitting black smoke.

[0056] This application embodiment constructs a power state table containing the original power, original speed, and original circulating oil volume, realizing rapid operating condition mapping and dynamic correction based on the lookup table method. Under normal conditions, the operating condition corresponding to the initial target power is directly locked to ensure power response efficiency. Under abnormal conditions, the "target circulating oil volume" that meets the hydrocarbon (HC) emission threshold is screened by traversing the power state table, and the corresponding "target speed" and "target power" are determined. This method not only simplifies the real-time calculation logic and improves the response speed of the control system, but also accurately adjusts the engine operating point to a safe range without black smoke under low temperature and high load conditions, effectively balancing power demand and emission control, and enhancing the adaptability and reliability of the range extender in cold environments.

[0057] Furthermore, the steps for determining that the initial operating condition is normal include:

[0058] Compare the relationship between the hydrocarbon content and the set content;

[0059] When the hydrocarbon content is less than the set content, the initial operating condition is determined to be normal; and / or,

[0060] Compare the relationship between the hydrocarbon content and the set content;

[0061] When the hydrocarbon content is greater than or equal to the set content, the initial operating condition is determined to be abnormal.

[0062] This application embodiment achieves rapid and accurate determination of the initial operating condition by directly comparing the numerical relationship between the hydrocarbon (HC) content in the engine exhaust and the set content. This method of using the set content as the discrimination standard ensures that when the HC content is lower than the set content, it is confirmed as a normal state to maintain the original power output. When the HC content reaches or exceeds the set threshold, it is confirmed as an abnormal state to trigger the power correction mechanism. This ensures that the control system can quickly identify the risk of smoke in critical operating conditions such as low temperature and cold regions, and thus take timely protective measures to ensure clean combustion and stable operation of the engine.

[0063] Furthermore, the operating condition also includes the engine speed. After the step of re-determining the initial operating condition in a normal state, and before the step of controlling the engine operation with the target power corresponding to the target operating condition, the determination method further includes:

[0064] Control the engine to switch from the current speed to the target speed corresponding to the target power by a set step size;

[0065] In addition, the engine can be controlled to switch from its current power to the target power in set steps.

[0066] This application embodiment adjusts the engine from its current state to the target speed and power in a segmented and gradual manner, effectively avoiding drastic fluctuations in engine speed or load caused by sudden changes in operating conditions. This smooth switching strategy not only significantly improves the smoothness of the range extender's operation after power correction and reduces NVH (noise, vibration, and harshness) impact, but also prevents the impact on the engine's mechanical structure and power generation system caused by abrupt changes in power output, further ensuring the system stability and driving comfort of the range extender during the cold-weather smoke correction process.

[0067] Furthermore, after the step of controlling engine operation with the target power corresponding to the target operating condition, the following is also included:

[0068] Obtain the engine's real-time coolant temperature;

[0069] When the real-time water temperature reaches the set temperature, the engine is controlled to run at the initial target power and the target speed corresponding to the initial target power. At this time, the water temperature has risen, which means that the engine will not produce black smoke when running at the initial target power given by the vehicle control unit under the secondary stroke condition.

[0070] This embodiment monitors the engine coolant temperature in real time and resumes the execution of the initial target power and corresponding target speed issued by the vehicle control unit when the coolant temperature rises back to the set thermal equilibrium critical point. This fully utilizes the physical characteristics of the engine, which has high exhaust HC emissions at low temperatures and improved combustion efficiency at high temperatures, to achieve a smooth transition from "low-temperature limitation protection" to "high-temperature full-power output". This avoids the engine from smoking during the low-temperature start-up phase, ensures engine safety, and avoids the problem of insufficient power caused by long-term engine power limitation. Thus, while ensuring emission compliance, it maximizes the power response performance of the range extender and the vehicle's range under all cold-weather operating conditions.

[0071] This application embodiment also provides an engine power determination device, the power determination device comprising:

[0072] The acquisition unit is used to acquire the initial target power of the engine, so as to determine the initial operating conditions of the engine based on the correspondence between the initial target power and the engine operating conditions. The operating conditions include the circulating oil volume of the engine, which is used to characterize the content of hydrocarbons in the engine exhaust.

[0073] The first processing unit is used to determine the initial operating condition as normal when the initial operating condition is determined to be abnormal based on the circulating oil quantity, and mark it as the target operating condition, and control the engine operation with the target power corresponding to the target operating condition.

[0074] Specifically, when the initial operating condition is normal, the hydrocarbon content is less than the set content; when the initial operating condition is abnormal, the hydrocarbon content is greater than or equal to the set content.

[0075] The engine power determination device provided in this application embodiment accurately acquires the initial target power through the acquisition unit and maps it to the corresponding initial operating conditions (including the circulating oil volume characterizing HC emissions). Combined with the intelligent judgment and correction logic of the first processing unit, it can quickly re-optimize and lock in a safe target operating condition and target power when an abnormal state (i.e., the risk of HC content exceeding the standard) is detected, while maintaining the original power output under normal conditions. This modular cooperation mechanism not only realizes the real-time identification and active suppression of the risk of black smoke in low-temperature cold regions, ensuring the stability of engine combustion and emission compliance, but also maximizes vehicle performance by retaining the power output under normal operating conditions, effectively balancing the safety, power and economy of the range extender in complex environments.

[0076] This application also provides a computer-readable storage medium including a stored program, wherein the program executes the above-described method when it runs.

[0077] This application also provides an engine system including an engine and a controller, which communicates with the engine, wherein the controller is used to execute the above-described method.

[0078] The engine system provided in this application integrates the above-mentioned power determination method into the controller, realizing coordinated control between the controller and the engine. This architecture enables the controller to adjust the target power and speed of the engine in real time based on real-time operating conditions (such as circulating oil volume and hydrocarbon content). This effectively prevents black smoke and engine damage by limiting power under abnormal operating conditions such as low temperature and cold regions, and restores full power output to ensure power performance under operating conditions such as normal water temperature. This significantly improves the adaptability of the vehicle in extreme environments and the user experience.

[0079] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0080] 1. By establishing a power limiting mechanism based on the correlation between outlet water temperature and hydrocarbon (HC) content in exhaust gas, the system can accurately identify and avoid "black smoke" conditions caused by high HC emissions during low-temperature start-up and rapid loading of the range extender. By correcting the engine operating point to a normal state that meets the HC emission threshold, the black smoke phenomenon caused by incomplete combustion is eliminated at the source. Simultaneously, it prevents engine backfiring, carbon buildup, and mechanical damage caused by abnormal combustion, significantly improving the engine's operational safety and emission compliance in cold-region environments.

[0081] 2. When the initial operating condition is determined to be normal (HC content below the set threshold), the initial target power is executed directly to preserve the vehicle's power requirements to the greatest extent possible; power correction is only performed when a risk of smoke is detected. Furthermore, by monitoring the coolant temperature in real time, the limitation is automatically lifted and the initial target power operation is restored once the coolant temperature rises back to the set temperature. This effectively avoids the power shortage problem caused by long-term power limitation, balancing low-temperature protection and overall vehicle driving performance.

[0082] 3. The initial and target operating conditions are determined by a lookup method based on a power state table, which simplifies the real-time calculation logic and improves the response speed of the control system. At the same time, a smooth transition mechanism for speed and power based on a set step size is introduced during the switching of operating conditions, which avoids drastic fluctuations in engine speed or load caused by sudden changes in target power, significantly reduces NVH impact, and improves the smoothness and comfort of range extender operation and vehicle driving.

[0083] 4. By combining water temperature monitoring and HC content feedback mechanisms, the range extender can adapt to different ambient temperatures and load changes. It provides reliable smoke protection in cold, low-temperature environments and sufficient power support under normal hot conditions, significantly improving the overall reliability, stability, and user satisfaction of the range extender power system under extreme climatic conditions.

[0084] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0085] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0086] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0087] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0088] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0089] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for determining the power of an engine, characterized in that, The determination method includes: The initial target power of the engine is obtained, and the initial operating conditions of the engine are determined according to the correspondence between the initial target power and the operating conditions of the engine. The operating conditions include the circulating oil volume of the engine, which is used to characterize the hydrocarbon content in the engine exhaust. If the initial operating condition is determined to be abnormal based on the circulating oil volume, the initial operating condition that is in a normal state is redefined and marked as the target operating condition, and the engine is controlled to operate with the target power corresponding to the target operating condition. Wherein, when the initial operating condition is the normal state, the content of hydrocarbons is less than the set content; when the initial operating condition is the abnormal state, the content of hydrocarbons is greater than or equal to the set content.

2. The method for determining the power of an engine according to claim 1, characterized in that, The determination method further includes: If the initial operating condition is determined to be normal, then the initial operating condition is marked as the target operating condition, and the engine is controlled to operate at the initial target power corresponding to the target operating condition.

3. The method for determining the power of an engine according to claim 2, characterized in that, The step of determining the initial operating conditions of the engine based on the correspondence between the target power and the engine's operating conditions includes: Traverse the power status table, which includes multiple raw power values, as well as the raw rotation speed and raw circulating oil quantity corresponding to each raw power value; The original power corresponding to the target power is determined accordingly; The initial operating conditions are determined based on the correspondence between the original power, the original rotational speed, and the original circulating oil volume.

4. The method for determining the power of an engine according to claim 3, characterized in that, The step of determining that the initial operating condition is normal includes: Compare the relationship between the content of the hydrocarbons and the set content; When the hydrocarbon content is less than the set content, the initial operating condition is determined to be the normal state; and / or, Compare the relationship between the content of the hydrocarbons and the set content; When the content of the hydrocarbons is greater than or equal to the set content, the initial operating condition is determined to be the abnormal state.

5. The method for determining the power of an engine according to claim 3, characterized in that, The step of re-determining the initial operating condition in the normal state includes: The power status table is traversed again to determine the original circulating oil quantity that is less than the set content among the multiple original circulating oil quantities in the power status table, and it is marked as the target circulating oil quantity. Based on the correspondence between the original circulating oil volume and the original speed and the original power, the original speed and the original power corresponding to the target circulating oil volume are determined and marked as the target speed and the target power; The engine is controlled to operate based on the target speed and the target power.

6. The method for determining the power of an engine according to claim 1, characterized in that, The operating condition also includes the engine speed. After the step of re-determining the initial operating condition in a normal state, and before the step of controlling the engine operation with the target power corresponding to the target operating condition, the determination method further includes: Control the engine to switch from the current speed to the target speed corresponding to the target power by a set step size; and / or control the engine to switch from the current power to the target power by a set step size.

7. The method for determining the power of an engine according to claim 1, characterized in that, The step of controlling the engine operation with the target power corresponding to the target operating condition further includes: Obtain the real-time water temperature of the engine; When the real-time water temperature reaches the set temperature, the engine is controlled to run at the initial target power and the target speed corresponding to the initial target power.

8. A power determination device for an engine, characterized in that, include: An acquisition unit is used to acquire the initial target power of the engine, and to determine the initial operating conditions of the engine based on the correspondence between the initial target power and the operating conditions of the engine. The operating conditions include the circulating oil volume of the engine, which is used to characterize the hydrocarbon content in the engine exhaust. The first processing unit is used to determine the initial operating condition as normal when the initial operating condition is determined to be abnormal based on the circulating oil quantity, and mark it as the target operating condition, and control the engine operation with the target power corresponding to the target operating condition. Wherein, when the initial operating condition is the normal state, the content of hydrocarbons is less than the set content; when the initial operating condition is the abnormal state, the content of hydrocarbons is greater than or equal to the set content.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein the program, when executed, performs the method of any one of claims 1 to 7.

10. An engine system, characterized in that, It includes an engine and a controller, the controller communicating with the engine, the controller being used to perform the method of any one of claims 1 to 7.

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