Torque Distribution Method, Device, Equipment and Medium under Carbon Loading Overload Fault

Abstract

The present application relates to the field of power control technology, and particularly to a torque distribution method, device, equipment and medium under the condition of carbon loading overload fault, which is used to solve the problem of low power performance after the DPF overload fault occurs in a hybrid vehicle. The method is as follows: when it is determined that the hybrid vehicle has a carbon loading overload fault and the first output torque of the engine is greater than the output torque limit value, obtain the battery power of the hybrid vehicle and the state values of the operating parameters of the electric motor; if the battery power is greater than the preset power and the state values of the operating parameters are all less than the corresponding limit values, determine the target torque of the engine based on the output torque limit value, and determine the target torque of the electric motor based on the first output torque, the output torque limit value and the second output torque of the electric motor; control the engine to output the target torque of the engine and control the electric motor to output the target torque of the electric motor; in this way, the overall power performance of the hybrid vehicle can be improved by increasing the output power of the electric motor.

Description

Technical Field

[0001] This application relates to the technical field of power control, and particularly to a torque distribution method, device, equipment and medium under the condition of carbon loading overload fault. Background Art

[0002] In order to meet the requirements of increasingly strict emission regulations, hybrid vehicles need to be equipped with an exhaust aftertreatment system. Taking an electric hybrid diesel vehicle as an example, the above exhaust aftertreatment system includes a Diesel Oxidation Catalyst (DOC) - Diesel Particulate Filter (DPF) - Selective Catalytic Reduction (SCR) system. Among them, the DPF is a wall-flow filter that relies on alternately blocking the inlet and outlet of the carrier holes to force the air flow to pass through the porous wall surface to achieve the capture of particulate matter. When too much particulate matter is captured in the DPF, in order to protect the DPF, the vehicle usually reports a carbon loading overload fault and at the same time limits the output torque of the engine, resulting in low power performance of the vehicle. Summary of the Invention

[0003] The embodiments of this application provide a torque distribution method, device, equipment and medium under the condition of carbon loading overload fault, so as to solve the problem of low power performance after the DPF overload fault occurs in hybrid vehicles.

[0004] The specific technical solutions provided by the embodiments of this application are as follows:

[0005] In a first aspect, the embodiments of this application provide a torque distribution method under the condition of carbon loading overload fault, which is applied to a hybrid vehicle. The hybrid vehicle includes an electric motor and an engine. The method includes:

[0006] When it is determined that the hybrid vehicle has a carbon loading overload fault and the first output torque of the engine is greater than the output torque limit value, obtain the battery power of the hybrid vehicle and the state values of the operating parameters of the electric motor, where the first output torque is determined based on the throttle opening value and a preset engine output torque distribution ratio;

[0007] If the battery power is greater than the preset power and the state values of the operating parameters are all less than the corresponding limit values, then based on the output torque limit value, determine the target torque of the engine, and based on the first output torque, the output torque limit value and the second output torque of the electric motor, determine the target torque of the electric motor, where the second output torque is determined based on the throttle opening value and a preset electric motor output torque distribution ratio;

[0008] Control the engine to output the target torque of the engine, and control the motor to output the target torque of the motor.

[0009] In the above method, after determining the carbon loading overload fault, it is determined whether the first output torque of the engine is greater than the output torque limit value. If so, when it is determined that the battery power is greater than the preset power and the state values corresponding to the operating parameters of the motor are all less than the corresponding limit values, the output torque of the motor is increased, the output power of the motor is increased, thereby increasing the total output power of the hybrid vehicle, so as to improve the overall power performance of the hybrid vehicle after the carbon loading overload fault occurs, and further meet the normal user needs of the user and improve the user experience.

[0010] In a possible implementation manner, the hybrid vehicle is determined to have the carbon loading overload fault in the following manner:

[0011] Obtain the pressure difference value of the exhaust gas filter of the hybrid vehicle through a pressure difference sensor. For each obtained pressure difference value, compare the pressure difference value with the pressure difference threshold; if it is determined based on the comparison result that each pressure difference value within a preset time period is greater than the pressure difference threshold, it is determined that the hybrid vehicle has the carbon loading overload fault; or,

[0012] Obtain the working condition state value of the hybrid vehicle, and based on the carbon loading model and the working condition state value, obtain the carbon loading calculation value of the hybrid vehicle; if the carbon loading calculation value is greater than the carbon loading threshold, it is determined that the hybrid vehicle has the carbon loading overload fault.

[0013] In a possible implementation manner, the first output torque is determined in the following manner:

[0014] Based on the total demand torque of the hybrid vehicle and the engine output torque distribution ratio, obtain the first output torque, where the total demand torque is determined based on the throttle opening value;

[0015] The second output torque is determined in the following manner:

[0016] Based on the total demand torque and the motor output torque distribution ratio, obtain the second output torque.

[0017] In a possible implementation manner, the determining the target torque of the engine based on the output torque limit value includes:

[0018] Determine the output torque limit value as the target torque of the engine;

[0019] The determining the target torque of the motor based on the first output torque, the output torque limit value and the second output torque of the motor includes:

[0020] Determine the difference between the first output torque and the output torque limit as the compensation torque;

[0021] Determine the sum of the compensation torque and the second output torque as the target torque of the motor.

[0022] The above method improves the output power of the motor by increasing the output torque of the motor, thereby improving the overall power performance of the hybrid vehicle after a carbon loading overload fault, so as to meet the normal user needs and improve the user experience.

[0023] In a possible implementation manner, after obtaining the battery power of the hybrid vehicle and the status values of the operating parameters of the motor, it further includes:

[0024] If the battery power is not greater than the preset power, and / or, the status value of at least one of the operating parameters is not less than the corresponding limit value, then determine the target torque of the motor as the preset value, and determine the output torque limit as the target torque of the engine;

[0025] Control the engine to output the target torque of the engine, and control the motor to output the target torque of the motor.

[0026] In a possible implementation manner, after determining the output torque limit as the target torque of the engine, it further includes:

[0027] Based on the vehicle speed of the hybrid vehicle and the speed and vehicle speed MAP, determine the target speed of the engine;

[0028] After controlling the engine to output the target torque of the engine, it further includes:

[0029] Control the speed of the engine to increase to the target speed.

[0030] In the above method, when it is determined that the battery power is not greater than the preset power, and / or, the status value of at least one of the operating parameters of the motor is not less than the corresponding limit value, it means that the motor cannot perform overloaded output, or cannot provide the second output torque obtained based on the established rules. Then, by increasing the speed of the engine to increase the output power of the engine, the overall power performance of the hybrid vehicle after a carbon loading overload fault is improved, so as to meet the normal user needs and improve the user experience.

[0031] In a second aspect, an embodiment of the present application provides a torque distribution device under a carbon loading overload fault, which is applied to a hybrid vehicle. The hybrid vehicle includes a motor and an engine. The device includes:

[0032] An acquisition module, configured to acquire the battery power of the hybrid vehicle and the status values of the operating parameters of the electric motor when it is determined that the hybrid vehicle has a carbon loading overload fault and the first output torque of the engine is greater than the output torque limit value, where the first output torque is determined based on the throttle opening value and a preset engine output torque distribution ratio;

[0033] A determination module, configured to, if the battery power is greater than a preset power and the status values of the operating parameters are all less than the corresponding limits, determine the target torque of the engine based on the output torque limit value, and determine the target torque of the electric motor based on the first output torque, the output torque limit value, and the second output torque of the electric motor, where the second output torque is determined based on the throttle opening value and a preset electric motor output torque distribution ratio;

[0034] A control module, configured to control the engine to output the target torque of the engine and control the electric motor to output the target torque of the electric motor.

[0035] In a possible implementation manner, the carbon loading overload fault of the hybrid vehicle is determined in the following way:

[0036] Obtain the pressure difference value of the exhaust gas filter of the hybrid vehicle through a pressure difference sensor, and compare the pressure difference value with a pressure difference threshold each time a pressure difference value is obtained; if it is determined based on the comparison result that each pressure difference value within a preset time period is greater than the pressure difference threshold, it is determined that the hybrid vehicle has the carbon loading overload fault; or,

[0037] Obtain the working condition status value of the hybrid vehicle, and obtain the carbon loading calculation value of the hybrid vehicle based on the carbon loading model and the working condition status value; if the carbon loading calculation value is greater than the carbon loading threshold, it is determined that the hybrid vehicle has the carbon loading overload fault.

[0038] In a possible implementation manner, the first output torque is determined in the following way:

[0039] Based on the total demand torque of the hybrid vehicle and the engine output torque distribution ratio, obtain the first output torque, where the total demand torque is determined based on the throttle opening value;

[0040] The second output torque is determined in the following way:

[0041] Based on the total demand torque and the electric motor output torque distribution ratio, obtain the second output torque.

[0042] In a possible implementation manner, the determination module is specifically configured to:

[0043] Determine the output torque limit value as the target torque of the engine;

[0044] The determining module is specifically configured to:

[0045] Determine the difference between the first output torque and the output torque limit value as the compensation torque;

[0046] Determine the sum of the compensation torque and the second output torque as the target torque of the motor.

[0047] In a possible implementation manner, the determining module is further configured to:

[0048] After obtaining the battery power of the hybrid vehicle and the status values of the operating parameters of the motor, if the battery power is not greater than the preset power, and / or, the status value of at least one of the operating parameters is not less than the corresponding limit value, determine the target torque of the motor as the preset value, and determine the output torque limit value as the target torque of the engine;

[0049] Control the engine to output the target torque of the engine, and control the motor to output the target torque of the motor.

[0050] In a possible implementation manner, the determining module is further configured to:

[0051] After determining the output torque limit value as the target torque of the engine, based on the vehicle speed of the hybrid vehicle and the rotational speed and vehicle speed MAP, determine the target rotational speed of the engine;

[0052] The control module is further configured to: after controlling the engine to output the target torque of the engine, control the rotational speed of the engine to increase to the target rotational speed.

[0053] In a third aspect, an embodiment of the present application provides an electronic device, including:

[0054] A memory, configured to store a computer program or instruction;

[0055] A processor, configured to execute the computer program or instruction in the memory, so that the method according to any one of the first aspects above is executed.

[0056] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which computer program instructions are stored, and when the computer program instructions are executed by a processor, the steps of the method according to any one of the first aspects above are implemented. Description of the Drawings

[0057] Figure 1Schematic flowchart of a torque distribution method under a carbon loading overload fault in an embodiment of the present application;

[0058] Figure 2 Schematic flowchart of a method for determining the target torque of an electric motor in an embodiment of the present application;

[0059] Figure 3 Schematic flowchart of another torque distribution method under a carbon loading overload fault in an embodiment of the present application;

[0060] Figure 4 Schematic logical architecture diagram of a torque distribution device under a carbon loading overload fault in an embodiment of the present application;

[0061] Figure 5 Schematic physical architecture diagram of an electronic device in an embodiment of the present application. Detailed implementation manners

[0062] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0063] It should be noted that the terms "first", "second", "third", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here.

[0064] Under the related technology, when a vehicle has a carbon loading overload fault, in order to protect the exhaust gas filter (such as DPF, Gasoline Particulate Filter (GPF)), and prevent the exhaust gas filter from burning out, usually the output torque of the engine is limited. However, once the output torque of the engine is limited, it will cause insufficient power of the vehicle, reduce the power performance of the vehicle, and make it impossible for the user to use the vehicle normally.

[0065] To solve the problem of low power performance after a DPF overload fault occurs in a hybrid vehicle, an embodiment of the present application provides a torque distribution method under a carbon loading overload fault. Specifically, when it is determined that a carbon loading overload fault has occurred in the hybrid vehicle and the first output torque of the engine is greater than the output torque limit value, the battery power of the hybrid vehicle and the status values of each operating parameter of the motor are obtained, where the first output torque is determined based on the throttle opening value and a preset engine output torque distribution ratio; if the battery power is greater than the preset power and the status values of each operating parameter are all less than the corresponding limit values, then based on the output torque limit value, the target torque of the engine is determined, and based on the first output torque, the output torque limit value, and the second output torque of the motor, the target torque of the motor is determined, where the second output torque is determined based on the throttle opening value and a preset motor output torque distribution ratio; control the engine to output the target torque of the engine and control the motor to output the target torque of the motor; in this way, the overall power performance of the hybrid vehicle after a carbon loading overload fault occurs can be improved by increasing the output power of the motor to meet the normal vehicle use needs of users.

[0066] The following further details the preferred embodiments of the present application with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application and are not used to limit the present application. And without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0067] In the embodiment of the present application, the hybrid vehicle includes an engine and a motor. The engine can be a diesel engine or a gasoline engine.

[0068] In specific implementation, during the driving process of the hybrid vehicle, the carbon loading in the exhaust gas filter (such as DPF, GPF, etc.) is continuously monitored to monitor whether a carbon loading overload fault occurs in the hybrid vehicle. In specific implementation, the following two methods can be used to determine that a carbon loading overload fault has occurred in the hybrid vehicle:

[0069] Method 1: Obtain the pressure difference value of the exhaust gas filter of the hybrid vehicle through a pressure difference sensor. Each time a pressure difference value is obtained, the pressure difference value is compared with the pressure difference threshold; if it is determined based on the comparison result that each pressure difference value within a preset time period is greater than the pressure difference threshold, it is determined that a carbon loading overload fault has occurred in the hybrid vehicle.

[0070] Method 2: Obtain the working condition status value of the hybrid vehicle, and based on the carbon loading model and the working condition status value, obtain the carbon loading calculation value of the hybrid vehicle; if the carbon loading calculation value is greater than the carbon loading threshold, it is determined that a carbon loading overload fault has occurred in the hybrid vehicle.

[0071] Among them, the working condition status value can include the engine speed, air-fuel ratio, vehicle load, etc. of the hybrid vehicle.

[0072] Then, after determining that a carbon loading overload fault has occurred in the hybrid vehicle, first, based on the throttle opening value, determine the total required torque of the hybrid vehicle, and then, according to the established rules (i.e., the engine output torque distribution ratio and the motor output torque distribution ratio described later), further determine the first output torque of the engine and the second output torque of the motor.

[0073] In a specific implementation, based on the total required torque of the hybrid vehicle and the engine output torque distribution ratio, obtain the above-mentioned first output torque, where the total required torque is determined based on the throttle opening value; based on the total required torque and the motor output torque distribution ratio, obtain the above-mentioned second output torque.

[0074] For example, assume that the total required torque is X Newton - meters, the above - mentioned engine output torque distribution ratio is 50%, and the above - mentioned motor output torque distribution ratio is 50%. Then, the first output torque of the engine is 50% * X Newton - meters, and the second output torque of the motor is 50% * X Newton - meters.

[0075] Then, compare the first output torque with the preset output torque limit of the engine. When the first output torque is greater than the output torque limit, refer to Figure 1 As shown, execute a torque distribution method under a carbon loading overload fault provided by an embodiment of the present application. The specific process of this method is as follows:

[0076] Step 100: When it is determined that a carbon loading overload fault has occurred in the hybrid vehicle and the first output torque of the engine is greater than the output torque limit, obtain the battery power of the hybrid vehicle and the status values of each operating parameter of the motor, where the first output torque is determined based on the throttle opening value and the preset engine output torque distribution ratio.

[0077] In an embodiment of the present application, when executing step 100, obtain the battery power of the hybrid vehicle and the status values of each operating parameter of the motor, where each operating parameter includes motor temperature, current, voltage, etc. Then, compare the obtained battery power with the preset power, and compare the obtained status values of each operating parameter with the corresponding limits. The preset power refers to the minimum power that satisfies the normal large - load output of the motor; if the battery power is greater than the preset power and the status values of each operating parameter are all less than the corresponding limits, then execute step 110; if the battery power is not greater than the preset power, and / or, the status value of at least one operating parameter among each operating parameter is not less than the corresponding limit, then execute step 130.

[0078] For example, still assuming that the total required torque is X N·m, the above-mentioned engine output torque distribution ratio is 50%, and the above-mentioned motor output torque distribution ratio is 50%. Then, the first output torque of the engine is 50% * X N·m, and the second output torque of the motor is 50% * X N·m. If 50% * X N·m > the output torque limit value F N·m, it indicates that the vehicle has limited the output torque of the engine. Then, perform step 100 to obtain the battery power and the status values of the respective operating parameters of the motor.

[0079] Step 110: If the battery power is greater than the preset power and the status values of the respective operating parameters are all less than the corresponding limit values, then based on the output torque limit value, determine the target torque of the engine, and based on the first output torque, the output torque limit value, and the second output torque of the motor, determine the target torque of the motor, where the second output torque is determined based on the throttle opening value and the preset motor output torque distribution ratio.

[0080] In the embodiment of the present application, when determining the target torque of the engine based on the output torque limit value in step 110, the output torque limit value can be specifically determined as the target torque of the engine; when determining the target torque of the motor based on the first output torque, the output torque limit value, and the second output torque of the motor in step 110, refer to Figure 2 As shown, the following steps can be specifically executed:

[0081] Step 200: Determine the compensation torque as the difference between the first output torque and the output torque limit value.

[0082] For example, still assuming that the total required torque is X N·m, the first output torque of the above-mentioned engine is 50% * X N·m, the second output torque of the motor is 50% * X N·m, and 50% * X N·m > the output torque limit value F N·m. Then, determine the output torque limit value F N·m as the target torque of the engine. Then, perform step 200 to determine the difference between the first output torque and the output torque limit value, that is, (50% * X - F) N·m, as the compensation torque.

[0083] Step 210: Determine the target torque of the motor as the sum of the compensation torque and the second output torque.

[0084] For example, still assuming that the total required torque is X N·m, the first output torque of the above-mentioned engine is 50% * X N·m, the second output torque of the motor is 50% * X N·m, and 50% * X N·m > the output torque limit value F N·m, the target torque of the engine is the output torque limit value F N·m, and the compensation torque is (50% * X - F) N·m. Then, perform step 210 to determine the sum of the compensation torque and the second output torque, that is, ((50% * X - F) + 50% * X), as the target torque of the motor.

[0085] It should be noted that in actual applications, when performing step 110, the target torque of the motor can also be determined based on the battery power or based on the state values corresponding to the operating parameters of the battery and the motor. At this time, the target torque of the motor may be greater than the sum of the compensation torque and the second output torque. Then, the target torque of the engine can be any value not greater than the output torque limit to protect the DPF.

[0086] Step 120: Control the engine to output the target torque of the engine and control the motor to output the target torque of the motor.

[0087] In the embodiment of the present application, when performing step 120, control the engine to output the aforementioned target torque of the engine and control the motor to output the aforementioned target torque of the motor. In this way, by increasing the target torque of the motor of the hybrid vehicle, the output power of the motor is increased, thereby increasing the total output power of the hybrid vehicle and improving the overall power performance of the hybrid vehicle after a carbon loading overload fault to meet the normal user needs.

[0088] In the embodiment of the present application, refer to Figure 3 As shown, after performing step 100, the torque distribution method under the above carbon loading overload fault further includes the following process:

[0089] Step 130: If the battery power is not greater than the preset power and / or the state value of at least one of the operating parameters is not less than the corresponding limit value, determine the target torque of the motor as the preset value and determine the output torque limit as the target torque of the engine.

[0090] In the embodiment of the present application, when it is determined that the battery power is not greater than the preset power and / or there is at least one operating parameter among the operating parameters of the motor whose state value is not less than the corresponding limit value, it means that the motor cannot output overload or cannot provide the second output torque obtained based on the established rules. Then, perform step 140 to increase the engine speed by shifting gears to maximize the output power of the engine, thereby improving the power performance of the hybrid vehicle under the carbon loading overload fault.

[0091] In the embodiment of the present application, the above preset value can be the second output torque, the torque limit (such as the output torque preset after the motor fails), or 0.

[0092] In specific implementation, when it is determined that the battery power is not greater than the preset power and / or the state value of at least one of the operating parameters is not less than the corresponding limit value, the output torque limit can be determined as the target torque of the engine, and the specific value of the preset value can be determined according to the actual situation of the hybrid vehicle.

[0093] In some embodiments, if the battery power is not greater than the preset power and the status values corresponding to the operating parameters are all less than the corresponding limits, it indicates that the motor cannot output overload, and the target torque of the motor is determined to be a preset value, where the preset value is the second output torque.

[0094] In some embodiments, if the status value of at least one of the operating parameters is not less than the corresponding limit, it indicates that the motor may have a fault and cannot provide the second output torque obtained based on the established rules, and the target torque of the motor is determined to be a preset value, where the preset value is the torque limit.

[0095] In some embodiments, if the battery power is less than the minimum power, the target torque of the motor is determined to be a preset value, where the preset value is 0. Further, the hybrid vehicle can also output a battery charging prompt message, or turn on a battery charging prompt light, or turn on a battery charging prompt icon to prompt the user about the battery power situation.

[0096] Step 140: Determine the target speed of the engine based on the vehicle speed of the hybrid vehicle and the speed and vehicle speed MAP.

[0097] In the embodiments of the present application, the total output power of the hybrid vehicle = the output power of the motor and the output power of the engine, where the output power of the engine = the output torque of the engine * the speed of the engine / 9550.

[0098] Then, when limiting the torque of the engine, that is, the actual output torque of the engine is less than the first output torque, and the motor cannot output overload or cannot provide the second output torque obtained based on the established rules, the output power of the engine can be increased by increasing the speed of the engine to increase the total output power of the hybrid vehicle and improve the overall power performance of the hybrid vehicle after a carbon loading overload fault occurs.

[0099] In specific implementation, after step 130 is executed, step 140 is executed to determine the target speed of the engine based on the vehicle speed of the hybrid vehicle and the pre-stored speed and vehicle speed MAP.

[0100] Step 150: Control the engine to output the target torque of the engine and control the motor to output the target torque of the motor.

[0101] Step 160: Control the speed of the engine to increase to the target speed.

[0102] In this way, by increasing the speed of the engine to increase the output power, the total output power of the hybrid vehicle is increased, and the overall power performance of the hybrid vehicle after a carbon loading overload fault occurs is improved, which can meet the normal user needs and improve the user experience.

[0103] In some embodiments, if it is determined that the hybrid vehicle does not have a carbon loading overload fault, the engine and / or motor of the hybrid vehicle are controlled to output corresponding output torques.

[0104] In some embodiments, the method further includes: after determining that the hybrid vehicle has the carbon loading overload fault, if the first output torque of the engine is not greater than the output torque limit value, determining the first output torque as the target torque of the engine, and determining the second output torque as the target torque of the motor; controlling the engine to output the target torque of the engine, and controlling the motor to output the target torque of the motor.

[0105] Based on the same inventive concept, refer to Figure 4 As shown, an embodiment of the present application provides a torque distribution device under a carbon loading overload fault, which is applied to a hybrid vehicle. The hybrid vehicle includes a motor and an engine. The device includes:

[0106] An acquisition module, configured to, when it is determined that the hybrid vehicle has a carbon loading overload fault and the first output torque of the engine is greater than the output torque limit value, acquire the battery power of the hybrid vehicle and the status values of the operating parameters of the motor, where the first output torque is determined based on the throttle opening value and a preset engine output torque distribution ratio;

[0107] A determination module, configured to, if the battery power is greater than a preset power and the status values of the operating parameters are all less than the corresponding limit values, determine the target torque of the engine based on the output torque limit value, and determine the target torque of the motor based on the first output torque, the output torque limit value, and the second output torque of the motor, where the second output torque is determined based on the throttle opening value and a preset motor output torque distribution ratio;

[0108] A control module, configured to control the engine to output the target torque of the engine, and control the motor to output the target torque of the motor.

[0109] In a possible implementation manner, the carbon loading overload fault of the hybrid vehicle is determined in the following manner:

[0110] Obtain the pressure difference value of the exhaust gas filter of the hybrid vehicle through a differential pressure sensor. Each time a pressure difference value is obtained, the pressure difference value is compared with a differential pressure threshold; if it is determined based on the comparison result that each pressure difference value within a preset time period is greater than the differential pressure threshold, it is determined that the hybrid vehicle has the carbon loading overload fault; or,

[0111] Obtain the operating condition state value of the hybrid vehicle, and based on the carbon loading model and the operating condition state value, obtain the calculated carbon loading value of the hybrid vehicle; if the calculated carbon loading value is greater than the carbon loading threshold, determine that the hybrid vehicle has a carbon loading overload fault.

[0112] In one possible implementation, the first output torque is determined by the following method:

[0113] Based on the total demand torque of the hybrid vehicle and the distribution ratio of the engine output torque, obtain the first output torque, where the total demand torque is determined based on the throttle opening value;

[0114] The second output torque is determined by the following method:

[0115] Based on the total demand torque and the distribution ratio of the motor output torque, obtain the second output torque.

[0116] In one possible implementation, the determining module is specifically configured to:

[0117] Determine the output torque limit value as the target torque of the engine;

[0118] The determining module is specifically configured to:

[0119] Determine the difference between the first output torque and the output torque limit value as the compensation torque;

[0120] Determine the sum of the compensation torque and the second output torque as the target torque of the motor.

[0121] In one possible implementation, the determining module is further configured to:

[0122] After obtaining the battery power of the hybrid vehicle and the state values of the operating parameters of the motor, if the battery power is not greater than the preset power, and / or, the state value of at least one of the operating parameters is not less than the corresponding limit value, determine that the target torque of the motor is a preset value, and determine the output torque limit value as the target torque of the engine; control the engine to output the target torque of the engine, and control the motor to output the target torque of the motor.

[0123] In one possible implementation, the determining module is further configured to:

[0124] After determining the output torque limit value as the target torque of the engine, based on the vehicle speed of the hybrid vehicle and the speed and vehicle speed MAP, determine the target speed of the engine;

[0125] The control module is further configured to: after controlling the engine to output the target torque of the engine, control the engine speed to increase to the target speed.

[0126] Refer to Figure 5 As shown, an electronic device provided in an embodiment of the present application includes:

[0127] A memory for storing computer programs or instructions;

[0128] A processor for executing the computer programs or instructions in the memory, so that any one of the methods in the above various embodiments is executed.

[0129] Based on the same inventive concept, an embodiment of the present application provides a computer-readable storage medium, on which computer program instructions are stored, and when the computer program instructions are executed by a processor, the steps of any one of the methods in the above various embodiments are implemented.

[0130] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0131] The present application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as the combination of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the functions specified in one or more flows in the flowchart and / or one or more blocks in the block diagram.

[0132] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured product including an instruction device, and the instruction device implements the functions specified in one or more flows in the flowchart and / or one or more blocks in the block diagram.

[0133] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus, so that a series of operation steps are performed on the computer or other programmable apparatus to produce a computer-implemented process, thereby the instructions executed on the computer or other programmable apparatus provide steps for implementing the functions specified in one process or a plurality of processes in the flowchart and / or one block or a plurality of blocks in the block diagram.

[0134] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

1. A torque distribution method under the condition of carbon loading overload fault, which is applied to a hybrid vehicle. The hybrid vehicle includes an electric motor and an engine, and is characterized in that, The method includes: When it is determined that the carbon loading overload fault occurs in the hybrid vehicle and the first output torque of the engine is greater than the output torque limit value, obtain the battery power of the hybrid vehicle and the state values of the operating parameters of the motor, where the first output torque is determined based on the throttle opening value and a preset engine output torque distribution ratio, and the operating parameters include motor temperature, current, and voltage; If the battery power is greater than the preset power and the state values of the operating parameters are all less than the corresponding limit values, then based on the output torque limit value, determine the target torque of the engine, and based on the first output torque, the output torque limit value, and the second output torque of the motor, determine the target torque of the motor, where the second output torque is determined based on the throttle opening value and a preset motor output torque distribution ratio; control the engine to output the target torque of the engine, and control the motor to output the target torque of the motor; If the battery power is not greater than the preset power, and / or, the state value of at least one of the operating parameters is not less than the corresponding limit value, then determine the target torque of the motor as a preset value, and determine the output torque limit value as the target torque of the engine; based on the vehicle speed of the hybrid vehicle and the speed and vehicle speed MAP, determine the target speed of the engine; control the engine to output the target torque of the engine, control the motor to output the target torque of the motor, and control the speed of the engine to increase to the target speed.

2. The method according to claim 1, characterized in that, The carbon loading overload fault of the hybrid vehicle is determined in the following manner: Obtain the pressure difference value of the exhaust gas filter of the hybrid vehicle through a differential pressure sensor, and each time a pressure difference value is obtained, compare the pressure difference value with a differential pressure threshold; If it is determined based on the comparison result that each pressure difference value within a preset time period is greater than the differential pressure threshold, then determine that the carbon loading overload fault occurs in the hybrid vehicle; Or, Obtain the working condition state value of the hybrid vehicle, and based on the carbon loading model and the working condition state value, obtain the carbon loading calculation value of the hybrid vehicle; If the carbon loading calculation value is greater than the carbon loading threshold, then determine that the carbon loading overload fault occurs in the hybrid vehicle.

3. The method according to claim 1, characterized in that The first output torque is determined in the following manner: Based on the total demand torque of the hybrid vehicle and the engine output torque distribution ratio, obtain the first output torque, where the total demand torque is determined based on the throttle opening value; The second output torque is determined in the following manner: Based on the total demand torque and the motor output torque distribution ratio, obtain the second output torque.

4. The method according to any one of claims 1-3, characterized in that, The determining the target torque of the engine based on the output torque limit value includes: Determine the output torque limit value as the target torque of the engine; The determining the target torque of the motor based on the first output torque, the output torque limit value, and the second output torque of the motor includes: Determine the difference between the first output torque and the output torque limit as the compensation torque; Determine the sum of the compensation torque and the second output torque as the target torque of the motor.

5. A torque distribution device under the condition of carbon loading overload, which is applied to a hybrid vehicle. The hybrid vehicle includes an electric motor and an engine, and is characterized in that, The device includes: An acquisition module, configured to acquire the battery power of the hybrid vehicle and the status values of the operating parameters of the motor when it is determined that the hybrid vehicle has a carbon loading overload fault and the first output torque of the engine is greater than the output torque limit, where the first output torque is determined based on the throttle opening value and a preset engine output torque distribution ratio, and the operating parameters include motor temperature, current, and voltage; A determination module, configured to, if the battery power is greater than a preset power and the status values of the operating parameters are all less than the corresponding limits, determine the target torque of the engine based on the output torque limit, and determine the target torque of the motor based on the first output torque, the output torque limit, and the second output torque of the motor, where the second output torque is determined based on the throttle opening value and a preset motor output torque distribution ratio; if the battery power is not greater than the preset power, and / or, the status value of at least one of the operating parameters is not less than the corresponding limit, determine the target torque of the motor as a preset value, and determine the output torque limit as the target torque of the engine, and determine the target speed of the engine based on the vehicle speed of the hybrid vehicle and the speed and vehicle speed MAP; A control module, configured to control the engine to output the target torque of the engine, and control the motor to output the target torque of the motor, and control the speed of the engine to increase to the target speed.

6. The device according to claim 5, characterized in that, Determine that the hybrid vehicle has the carbon loading overload fault in the following manner: Obtain the pressure difference value of the exhaust gas filter of the hybrid vehicle through a pressure difference sensor, and compare the pressure difference value with a pressure difference threshold each time a pressure difference value is obtained; If it is determined based on the comparison result that each pressure difference value within a preset duration is greater than the pressure difference threshold, determine that the hybrid vehicle has the carbon loading overload fault; Or, Obtain the condition status value of the hybrid vehicle, and obtain the carbon loading calculation value of the hybrid vehicle based on the carbon loading model and the condition status value; If the carbon loading calculation value is greater than the carbon loading threshold, determine that the hybrid vehicle has the carbon loading overload fault.

7. An electronic device, characterized in that, Includes: A memory, configured to store computer programs or instructions; A processor, configured to execute the computer programs or instructions in the memory, so that the method described in any one of claims 1-4 is executed.

8. A computer-readable storage medium having computer program instructions stored thereon, characterized in that, When the computer program instructions are executed by the processor, the steps of the method described in any one of claims 1-4 are implemented.

Images