Method and related equipment for regenerating particulate filter under parking power generation condition

Abstract

The present invention provides a method and related equipment for regenerating a particulate filter under a parking power generation condition, and relates to the field of vehicle technology. The method comprises: when a vehicle enters a parking power generation condition, if it is determined that the particulate filter DPF meets a preset micro-regeneration triggering condition, the parking power generation duration is evaluated to obtain an estimated parking power generation duration; if the estimated parking power generation duration meets the preset duration condition, parking power generation is performed based on a first power generation power to charge the vehicle battery, and the exhaust temperature of the engine is controlled to regenerate the DPF; when it is monitored that the DPF meets the preset micro-regeneration termination condition, the exhaust temperature of the engine is stopped from being controlled to end the DPF regeneration process. By applying the method of the present invention, the control operation of DPF regeneration can be performed when the parking power generation condition triggers the engine to run, thereby reducing the carbon load of the DPF, which is beneficial to reducing the frequency of parking regeneration for users and improving the driving experience of users.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a method for regenerating a particle collector under a parking power generation condition and related equipment. Background Art

[0002] As motor vehicle pollutant emission standards change, the exhaust emission standards for hybrid vehicles are also improved. Diesel Particulate Filter (DPF) is one of the important components in the exhaust system of hybrid vehicles. DPF is a particle filter, which is composed of honeycomb ceramics with a certain pore density. The exhaust of the engine passes through the pore wall of the DPF, and the particulate matter in the exhaust is captured and filtered by the DPF.

[0003] During the use of DPF, particulate matter in DPF will continue to accumulate. In order to ensure the filtering capacity of DPF, it is usually detected in real time whether DPF is overloaded. When DPF overload is detected, the user is prompted that DPF is overloaded and needs to park the vehicle for DPF regeneration. When the user parks the vehicle and triggers the DPF parking regeneration function button, the DPF regeneration operation is performed, that is, the accumulated particulate matter in the DPF is cleared.

[0004] In the existing DPF regeneration method, the user needs to park the car to trigger the DPF parking regeneration function and wait for the DPF regeneration process to complete before driving again. When the frequency of DPF overload is high, the user needs to park the car frequently to regenerate the DPF parking, which is likely to have an adverse effect on the user's driving and make the user's driving experience poor. Summary of the invention

[0005] In view of this, an embodiment of the present invention provides a method for regenerating a particulate filter under parking power generation conditions to solve the problem of the existing DPF regeneration method. When the DPF overload frequency is high, the user needs to park the vehicle frequently to regenerate the DPF, resulting in a poor driving experience.

[0006] The embodiment of the present invention further provides a device for regenerating a particulate filter under a parking power generation condition, so as to ensure the practical realization and application of the above method.

[0007] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0008] A method for regenerating a particulate filter under a parking power generation condition, comprising:

[0009] When it is determined that the vehicle enters the parking power generation operating condition, determining whether the particle collector of the vehicle meets a preset micro-regeneration triggering condition;

[0010] If the particulate filter meets the micro-regeneration triggering condition, the power generation time of the vehicle under the parking power generation condition is evaluated to obtain an estimated parking power generation time;

[0011] Determining whether the estimated parking power generation duration meets a preset duration condition;

[0012] If the estimated parking power generation duration meets the duration condition, parking power generation is performed based on a preset first power generation to charge a vehicle battery, and the exhaust temperature of the engine is controlled to regenerate the particulate filter;

[0013] Real-time monitoring of whether the particle collector meets the preset micro-regeneration termination conditions;

[0014] When it is monitored that the particulate trap meets the micro-regeneration termination condition, the control of the exhaust temperature of the engine is stopped, and the regeneration process of the particulate trap is ended.

[0015] In the above method, optionally, the determining whether the particle trap of the vehicle meets a preset micro-regeneration triggering condition includes:

[0016] Determining whether the current carbon load of the particulate trap is greater than a preset first carbon load threshold;

[0017] If the current carbon load of the particulate trap is greater than the first carbon load threshold, it is determined that the particulate trap meets the micro-regeneration triggering condition.

[0018] Optionally, the method of evaluating the power generation time of the vehicle under the parking power generation condition to obtain the estimated parking power generation time includes:

[0019] Determining an actual state of charge corresponding to the vehicle battery; the actual state of charge is a current state of charge of the vehicle battery;

[0020] Determining a battery capacity corresponding to the vehicle battery;

[0021] Determining a target state of charge corresponding to the vehicle battery; the target state of charge represents an upper limit value of the state of charge for charging under a parking power generation condition;

[0022] Determining a charging efficiency corresponding to the vehicle battery;

[0023] Performing a difference operation on the target state of charge and the actual state of charge to obtain a first operation result;

[0024] Performing a product operation on the first operation result and the battery capacity to obtain a second operation result;

[0025] Dividing the second calculation result by the first generated power to obtain a third calculation result;

[0026] The third calculation result is divided by the charging efficiency to obtain a fourth calculation result, and the fourth calculation result is used as the estimated parking power generation time.

[0027] In the above method, optionally, the determining whether the estimated parking power generation duration meets a preset duration condition includes:

[0028] Determining whether the estimated parking power generation time is greater than a preset power generation time threshold;

[0029] If the estimated parking power generation time is greater than the power generation time threshold, it is determined that the estimated parking power generation time meets the time condition.

[0030] In the above method, optionally, the controlling of the exhaust temperature of the engine to regenerate the particulate trap comprises:

[0031] Determine an initial state of charge; the initial state of charge is the state of charge of the vehicle battery at the current time point;

[0032] Determining an initial temperature target value according to the initial state of charge;

[0033] Controlling the exhaust temperature of the engine to reach the initial temperature target value, and periodically adjusting the exhaust temperature of the engine according to a preset adjustment period to perform carbon removal treatment on the particulate trap;

[0034] When at an adjustment time point of the preset adjustment cycle, determining the battery state of charge corresponding to the current adjustment time point; the battery state of charge corresponding to the current adjustment time point is the state of charge of the vehicle battery at the current adjustment time point;

[0035] According to the battery state of charge corresponding to the current adjustment time point, the adjustment temperature target value corresponding to the current adjustment time point is determined, and the exhaust temperature of the engine is controlled to be adjusted from the current temperature value to the adjustment temperature target value; when the battery state of charge corresponding to the current adjustment time point is higher than the battery state of charge corresponding to the previous adjustment time point, the adjustment temperature target value is less than or equal to the current temperature value.

[0036] In the above method, optionally, the real-time monitoring of whether the particle trap meets a preset micro-regeneration termination condition includes:

[0037] monitoring whether the vehicle exits the parking power generation state;

[0038] If the vehicle exits the parking power generation condition, determining that the particulate filter meets the micro-regeneration termination condition;

[0039] If the vehicle has not exited the parking power generation operating state, determining whether the current carbon load of the particulate filter is less than a preset second carbon load threshold;

[0040] If the current carbon load of the particulate trap is less than the second carbon load threshold, it is determined that the particulate trap meets the micro-regeneration termination condition.

[0041] The above method may optionally further include:

[0042] If the estimated parking power generation duration does not meet the duration condition, parking power generation is performed based on a preset second power generation power to charge the vehicle battery and make the exhaust gas of the engine reach the required temperature for passive regeneration of the particulate filter; the second power generation power is higher than the first power generation power.

[0043] A device for regenerating a particulate filter under a parking power generation condition, comprising:

[0044] A first judgment unit is used to judge whether the particulate filter of the vehicle meets a preset micro-regeneration triggering condition when it is determined that the vehicle enters a parking power generation operating state;

[0045] a duration evaluation unit, configured to evaluate the power generation duration of the vehicle under the parking power generation condition to obtain an estimated parking power generation duration if the particulate filter meets the micro-regeneration triggering condition;

[0046] A second judgment unit is used to judge whether the estimated parking power generation time meets a preset time condition;

[0047] a regeneration control unit, configured to, if the estimated parking power generation duration meets the duration condition, perform parking power generation based on a preset first power generation to charge the vehicle battery, and control the exhaust temperature of the engine to perform a regeneration operation on the particulate filter;

[0048] A third judgment unit is used to monitor in real time whether the particle trap meets a preset micro-regeneration termination condition;

[0049] The regeneration termination unit is used to stop controlling the exhaust temperature of the engine and terminate the regeneration process of the particulate trap when it is monitored that the particulate trap meets the micro-regeneration termination condition.

[0050] A storage medium includes stored instructions, wherein when the instructions are executed, the device where the storage medium is located is controlled to execute the method for regenerating a particulate filter under the parking power generation condition as described above.

[0051] An electronic device includes a memory and one or more instructions, wherein the one or more instructions are stored in the memory and configured to be executed by one or more processors to perform the above-mentioned method for regenerating a particulate filter under a parking power generation condition.

[0052] Based on the above-mentioned embodiment of the present invention, a method for regenerating a particulate filter under a parking power generation condition is provided, including: when it is determined that the vehicle enters the parking power generation condition, judging whether the particulate filter of the vehicle meets the preset micro-regeneration triggering condition; if the particulate filter meets the micro-regeneration triggering condition, evaluating the power generation time of the vehicle under the parking power generation condition to obtain the estimated parking power generation time; judging whether the estimated parking power generation time meets the preset time condition; if the estimated parking power generation time meets the time condition, parking power generation is performed based on the preset first power generation power to charge the vehicle battery, and the exhaust temperature of the engine is controlled to regenerate the particulate filter; real-time monitoring whether the particulate filter meets the preset micro-regeneration termination condition; when it is monitored that the particulate filter meets the micro-regeneration termination condition, the exhaust temperature of the engine is stopped to end the regeneration process of the particulate filter. The method provided by the embodiment of the present invention can actively trigger the regeneration of the particulate filter DPF when the vehicle is in the parking power generation condition. When the vehicle is in a normal parking state, the running state of the engine triggered by parking power generation is used to perform the DPF regeneration control operation to decarbonize the DPF. This can reduce the carbon load of the DPF without the user noticing, extend the normal use time of the DPF, and reduce the frequency of DPF overload, thereby reducing the frequency of parking regeneration by the user, which is beneficial to reduce the impact on the user's driving status and improve the user's driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0054] Figure 1 A method flow chart of a method for regenerating a particulate filter under a parking power generation condition provided by an embodiment of the present invention;

[0055] Figure 2 A further method flow chart of a method for regenerating a particulate filter under a parking power generation condition provided by an embodiment of the present invention;

[0056] Figure 3 A schematic diagram of a particulate filter regeneration process under a parking power generation condition provided by an embodiment of the present invention;

[0057] Figure 4 A schematic diagram of the structure of a device for regenerating a particulate filter under a parking power generation condition provided by an embodiment of the present invention;

[0058] Figure 5 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0059] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0061] The embodiment of the present invention provides a method for regenerating a particulate filter under a parking power generation condition. The method can be applied to a hybrid electric vehicle, and the execution subject can be an electronic control unit (ECU) of the vehicle. The method flow chart of the method is as follows: Figure 1 As shown, including:

[0062] S101: When it is determined that the vehicle enters the parking power generation operating state, determining whether the particulate filter of the vehicle meets a preset micro-regeneration triggering condition;

[0063] The method provided in the embodiment of the present invention is applied to a hybrid electric vehicle. The parking power generation condition of a hybrid electric vehicle refers to the use of the engine to drive the generator to generate electricity when the vehicle is parked (parked), usually to charge the vehicle battery to maintain the power of the vehicle battery.

[0064] After the vehicle is started, it can monitor in real time whether the vehicle meets the preset parking power generation conditions. When the vehicle meets the parking power generation conditions, the vehicle enters the parking power generation state. The parking power generation conditions can be set according to the actual parking power generation needs, for example, including the conditional elements such as the battery power of the vehicle is lower than the threshold, the vehicle is stationary, and the vehicle gear is in neutral.

[0065] In the method provided in the embodiment of the present invention, the micro-regeneration triggering conditions can be set in advance according to actual needs, that is, the conditions under which the particulate filter DPF needs to be regenerated under the parking power generation condition, for example, it can be set according to whether the carbon load meets the regeneration requirements. When the controller detects that the vehicle has entered the parking power generation condition, the real-time status parameters of the DPF can be obtained according to the preset micro-regeneration triggering conditions, and whether the DPF meets the preset micro-regeneration triggering conditions can be judged according to the real-time status parameters of the DPF. The so-called micro-regeneration is to distinguish the DPF regeneration method in the embodiment of the present invention from the traditional user-triggered DPF parking regeneration, so the DPF regeneration operation in the embodiment of the present invention is called micro-regeneration. The carbon loading of the DPF refers to the total weight of the carbon accumulated in the DPF, and the carbon loading characterizes the degree of accumulation of particulate matter in the DPF.

[0066] S102: If the particulate filter meets the micro-regeneration triggering condition, evaluating the power generation time of the vehicle under the parking power generation condition to obtain an estimated parking power generation time;

[0067] In the method provided in an embodiment of the present invention, if the DPF meets the preset micro-regeneration triggering conditions, the power generation time of the vehicle under the parking power generation condition is estimated based on the preset power generation time evaluation strategy, and the estimated power generation time is used as the estimated parking power generation time.

[0068] S103: Determine whether the estimated parking power generation duration meets a preset duration condition;

[0069] In the method provided in the embodiment of the present invention, the duration condition can be set in advance according to actual needs, that is, if DPF regeneration is performed, the parking power generation estimation duration must meet the condition requirements. The controller can match the current parking power generation estimation duration with the condition content of the preset duration condition to identify whether the parking power generation estimation duration meets the preset duration condition.

[0070] S104: If the estimated parking power generation duration meets the duration condition, parking power generation is performed based on a preset first power generation to charge the vehicle battery, control the exhaust temperature of the engine, and perform a regeneration operation on the particulate filter;

[0071] In the method provided by the embodiment of the present invention, if the estimated duration of parking power generation meets the preset duration condition, the engine can be controlled to drive the generator to generate electricity according to the preset first power generation to perform parking power generation, thereby charging the battery of the vehicle. At the same time, the engine starts thermal management, and through the preset control operation, the exhaust temperature of the engine is controlled to rise to a temperature that can burn or oxidize the accumulated substances in the DPF, so as to promote the combustion of the accumulated substances in the DPF through the exhaust temperature of the engine, thereby achieving DPF regeneration. The operation of controlling the increase of exhaust temperature can be achieved by existing thermal management methods, such as controlling the intake throttle valve to reduce the intake, and injecting hydrocarbons in the exhaust gas to burn them. The first power generation can be set according to the principle of economy, and the first power generation can be understood as the conventional power generation under the parking power generation condition.

[0072] S105: monitoring in real time whether the particle trap meets a preset micro-regeneration termination condition;

[0073] In the method provided in the embodiment of the present invention, the micro-regeneration termination condition, i.e., the condition for stopping the DPF regeneration, can be set in advance according to actual needs. For example, the micro-regeneration termination condition can be set based on factors such as the carbon load of the DPF and the vehicle operation status. The controller can obtain the real-time state parameters of the DPF or the real-time state parameters of the vehicle according to the micro-regeneration termination condition in real time, and match the obtained real-time state parameters with the condition content of the micro-regeneration termination condition to identify whether the DPF meets the preset micro-regeneration termination condition.

[0074] S106: When it is monitored that the particulate trap meets the micro-regeneration termination condition, the control of the exhaust temperature of the engine is stopped, and the regeneration process of the particulate trap is ended.

[0075] In the method provided by the embodiment of the present invention, when it is monitored that the DPF meets the preset micro-regeneration termination condition, the thermal management of the engine is exited, that is, the control of the exhaust temperature is stopped, and the DPF regeneration operation is terminated.

[0076] Based on the method provided by the embodiment of the present invention, when the vehicle enters the parking power generation condition, it is determined whether the vehicle's particulate filter meets the preset micro-regeneration triggering condition; if the particulate filter meets the micro-regeneration triggering condition, the power generation time of the vehicle under the parking power generation condition is evaluated to obtain the estimated parking power generation time; it is determined whether the estimated parking power generation time meets the preset time condition; if the estimated parking power generation time meets the time condition, parking power generation is performed based on the preset first power generation power to charge the vehicle battery, and the exhaust temperature of the engine is controlled to regenerate the particulate filter; real-time monitoring is performed to determine whether the particulate filter meets the preset micro-regeneration termination condition; when it is detected that the particulate filter meets the micro-regeneration termination condition, the control of the exhaust temperature of the engine is stopped to end the regeneration process of the particulate filter. By applying the method provided by the embodiment of the present invention, the regeneration of the particulate filter DPF can be actively triggered when the vehicle is in the parking power generation condition. When the vehicle is in a normal parking state, the running state of the engine triggered by parking power generation is used to perform the DPF regeneration control operation to decarbonize the DPF. This can reduce the carbon load of the DPF without the user noticing, extend the normal use time of the DPF, and reduce the frequency of DPF overload, thereby reducing the frequency of parking regeneration by the user, which is beneficial to reduce the impact on the user's driving status and improve the user's driving experience.

[0077] exist Figure 1 On the basis of the method shown, in the method provided by the embodiment of the present invention, the process of determining whether the particulate filter of the vehicle meets the preset micro-regeneration triggering condition mentioned in step S101 includes:

[0078] Determining whether the current carbon load of the particulate trap is greater than a preset first carbon load threshold;

[0079] In the method provided in the embodiment of the present invention, the first carbon load threshold is set in advance according to actual needs. The threshold is used to measure whether DPF regeneration is required under the parking power generation condition. It can also be understood as the critical value of DPF overload under the parking power generation condition. For example, the first carbon load threshold can be set to 3.0g / L. The controller can obtain the currently monitored carbon load of the DPF from the vehicle's after-treatment system. The current carbon load of the DPF is compared with the preset first carbon load threshold to determine whether the current carbon load of the DPF is greater than the first carbon load threshold.

[0080] If the current carbon load of the particulate trap is greater than the first carbon load threshold, it is determined that the particulate trap meets the micro-regeneration triggering condition.

[0081] In the method provided by the embodiment of the present invention, if the current carbon load of the DPF is greater than the preset first carbon load threshold, it is considered that the DPF meets the preset micro-regeneration triggering condition. If the current carbon load of the DPF is not greater than the first carbon load threshold, it is considered that the DPF does not meet the preset micro-regeneration triggering condition.

[0082] exist Figure 1 On the basis of the method shown, in the method provided by the embodiment of the present invention, the process of evaluating the power generation time of the vehicle under the parking power generation condition mentioned in step S102 to obtain the estimated parking power generation time includes:

[0083] Determining an actual state of charge corresponding to the vehicle battery; the actual state of charge is a current state of charge of the vehicle battery;

[0084] In the method provided by the embodiment of the present invention, the controller can obtain the current state of charge of the vehicle battery from the battery management system, and use the current state of charge of the vehicle battery as the actual state of charge corresponding to the vehicle battery. The state of charge (SOC) of a battery refers to the ratio of the remaining capacity of a battery after it has been used for a period of time or has been left unused for a long time to its capacity in a fully charged state. SOC is usually expressed as a percentage. When SOC=0%, it means that the battery is fully discharged, and when SOC=100%, it means that the battery is fully charged. SOC reflects the actual available power of the battery, that is, the remaining power.

[0085] Determining a battery capacity corresponding to the vehicle battery;

[0086] In the method provided in the embodiment of the present invention, the controller may obtain the battery capacity of the vehicle battery from the battery configuration data. It can be understood that the battery capacity is an inherent parameter of the battery, and the unit is usually kW•h.

[0087] Determining a target state of charge corresponding to the vehicle battery; the target state of charge represents an upper limit value of the state of charge for charging under a parking power generation condition;

[0088] In the method provided in the embodiment of the present invention, the target state of charge can be set in advance according to actual needs. The target state of charge is the upper limit of the state of charge that can be achieved by charging the vehicle battery under the parking power generation condition. The controller can obtain the preset target state of charge as the target state of charge corresponding to the vehicle battery.

[0089] Determining a charging efficiency corresponding to the vehicle battery;

[0090] In the method provided in the embodiment of the present invention, the charging efficiency of the vehicle battery can be measured in advance by test or other means, and the charging efficiency can be stored in data. The controller can obtain the preset charging efficiency as the charging efficiency corresponding to the vehicle battery.

[0091] Performing a difference operation on the target state of charge and the actual state of charge to obtain a first operation result;

[0092] In the method provided by the embodiment of the present invention, a difference operation is performed between the target state of charge and the actual state of charge, and the difference between the target state of charge and the actual state of charge is used as the first operation result.

[0093] Performing a product operation on the first operation result and the battery capacity to obtain a second operation result;

[0094] In the method provided by the embodiment of the present invention, the first operation result is multiplied by the battery capacity, and the product of the first operation result and the battery capacity is used as the second operation result.

[0095] Dividing the second calculation result by the first generated power to obtain a third calculation result;

[0096] In the method provided by the embodiment of the present invention, the second operation result is divided by the first power generation, and the quotient of the second operation result and the first power generation is used as the third operation result.

[0097] The third calculation result is divided by the charging efficiency to obtain a fourth calculation result, and the fourth calculation result is used as the estimated parking power generation time.

[0098] In the method provided by the embodiment of the present invention, the third operation result is divided by the charging efficiency, and the quotient of the third operation result and the charging efficiency is taken as the fourth operation result, that is, the estimated duration of parking power generation. In general, the calculation principle of the estimated duration of parking power generation is: estimated duration of parking power generation = (target state of charge - actual state of charge) * battery capacity / first power generation power / charging efficiency. Among them, the units of target state of charge, actual state of charge and charging efficiency are %, the unit of battery capacity is kW•h (kilowatt-hour), the unit of first power generation power is kW (kilowatt), and the unit of estimated duration of parking power generation is h (hour).

[0099] exist Figure 1 On the basis of the method shown, in the method provided by the embodiment of the present invention, the process of determining whether the estimated duration of parking power generation meets the preset duration condition mentioned in step S103 includes:

[0100] Determining whether the estimated parking power generation time is greater than a preset power generation time threshold;

[0101] In the method provided in the embodiment of the present invention, a power generation duration threshold can be set in advance according to actual needs. The threshold is used to measure whether the power generation duration meets the requirements of the DPF regeneration operation. For example, the power generation duration threshold can be set to 3 minutes. The controller can compare the estimated parking power generation duration with the preset power generation duration threshold to identify whether the estimated parking power generation duration is greater than the power generation duration threshold.

[0102] If the estimated parking power generation time is greater than the power generation time threshold, it is determined that the estimated parking power generation time meets the time condition.

[0103] In the method provided by the embodiment of the present invention, if the current estimated parking power generation time is greater than the preset power generation time threshold, it is considered that the estimated parking power generation time meets the preset time condition. If the estimated parking power generation time is not greater than the preset power generation time threshold, it is considered that the estimated parking power generation time does not meet the preset time condition.

[0104] Based on the method provided in the embodiment of the present invention, DPF regeneration can be performed only when the estimated parking power generation time is greater than the preset power generation time threshold, that is, when the estimated parking power generation time is relatively long, which is beneficial to ensure that there is sufficient time for DPF regeneration operation.

[0105] exist Figure 1 Based on the method shown, Figure 2 As shown, in the method provided by the embodiment of the present invention, the process of controlling the exhaust temperature of the engine mentioned in step S104 to regenerate the particulate filter includes:

[0106] S201: Determine an initial state of charge; the initial state of charge is the state of charge of the vehicle battery at the current time point;

[0107] In the method provided by the embodiment of the present invention, when starting the thermal management of the engine, that is, when starting to control the exhaust temperature of the engine, the charge state of the vehicle battery at the current time point can be first obtained as the initial charge state.

[0108] S202: determining an initial temperature target value according to the initial state of charge;

[0109] In the method provided in the embodiment of the present invention, the conversion method between the state of charge and the exhaust temperature target value can be pre-configured. For example, the temperature target value matching each state of charge range can be pre-configured, and the matching temperature target value can be found according to the range of the state of charge. A conversion formula can also be set to calculate the temperature target value based on the state of charge. That is, in the embodiment of the present invention, the control target of the exhaust temperature is determined according to the state of charge of the battery, and the corresponding temperature target value is selected to control the exhaust temperature under different states of charge.

[0110] The controller may determine a temperature target value corresponding to the initial state of charge based on a preset conversion method, and use the temperature target value as the initial temperature target value.

[0111] S203: Controlling the exhaust temperature of the engine to reach the initial temperature target value;

[0112] In the method provided by the implementation of the present invention, the exhaust temperature of the engine can be increased through the thermal management system of the engine so that the exhaust temperature reaches the initial temperature target value, and the DPF is started to be decarbonized.

[0113] S204: periodically adjusting the exhaust temperature of the engine according to a preset adjustment period;

[0114] In the method provided in the embodiment of the present invention, during the decarbonization process of the DPF, the exhaust temperature of the engine can be periodically adjusted according to a preset adjustment period. For example, the preset adjustment period is one minute, and after the exhaust temperature is controlled at the initial temperature target value, every one minute is an adjustment time point, and the exhaust temperature target value can be readjusted.

[0115] S205: When at an adjustment time point of the preset adjustment cycle, determining a battery state of charge corresponding to the current adjustment time point; the battery state of charge corresponding to the current adjustment time point is the state of charge of the vehicle battery at the current adjustment time point;

[0116] In the method provided by the embodiment of the present invention, when the adjustment time point is reached, the controller can obtain the current state of charge of the vehicle battery as the battery state of charge corresponding to the current adjustment time point.

[0117] S206: Determine an adjustment temperature target value corresponding to the current adjustment time point according to the battery state of charge corresponding to the current adjustment time point, and control the exhaust temperature of the engine to be adjusted from the current temperature value to the adjustment temperature target value.

[0118] In the method provided by the embodiment of the present invention, the controller can determine the temperature target value corresponding to the current battery state of charge according to the preset conversion mode, use the temperature target value as the adjustment temperature target value at the current adjustment time point, and use the current adjustment temperature target value as the control target to adjust the exhaust temperature of the engine to the adjustment temperature target value. In the embodiment of the present invention, as the battery state of charge increases, the target value of the exhaust temperature control is gradually reduced. That is, if the battery state of charge corresponding to the current adjustment time point is higher than the battery state of charge corresponding to the previous adjustment time point, the adjustment temperature target value corresponding to the current adjustment time point is less than or equal to the current temperature value of the exhaust temperature. It can be understood that the current temperature value of the exhaust temperature represents the adjustment temperature target value corresponding to the previous adjustment time point. If the current adjustment time point is the first adjustment time point in the preset adjustment cycle, then the battery state of charge corresponding to the previous adjustment time point is the initial state of charge in step S201. After completing the adjustment operation at the current adjustment time point, wait until the next adjustment time point is reached and perform the operations of steps S205-S206 again.

[0119] Based on the method provided in the embodiment of the present invention, when performing the DPF regeneration operation, the target value of the exhaust temperature can be adjusted based on the real-time state of charge of the battery. When the battery state of charge gradually increases and it is possible to exit the parking power generation, the target value of the engine thermal management can be lowered to cool the DPF in advance, which is beneficial to avoid thermal shock damage to the DPF caused by suddenly exiting the parking power generation condition.

[0120] exist Figure 1 On the basis of the method shown, in the method provided by the embodiment of the present invention, the process of real-time monitoring of whether the particle trap meets the preset micro-regeneration termination condition mentioned in step S105 includes:

[0121] monitoring whether the vehicle exits the parking power generation state;

[0122] In the method provided in the embodiment of the present invention, the controller can monitor in real time whether the vehicle exits the parking power generation condition, and specifically can identify whether the vehicle switches to other operating conditions through the vehicle operating status.

[0123] If the vehicle exits the parking power generation condition, determining that the particulate filter meets the micro-regeneration termination condition;

[0124] In the method provided by the embodiment of the present invention, when the vehicle exits the parking power generation condition, that is, stops parking power generation, it is considered that the DPF meets the preset micro-regeneration termination condition.

[0125] If the vehicle has not exited the parking power generation operating state, determining whether the current carbon load of the particulate filter is less than a preset second carbon load threshold;

[0126] In the method provided in the embodiment of the present invention, the second carbon load threshold value can be set in advance according to actual needs, and the threshold value is used to measure whether the DPF does not need to perform carbon removal treatment. If the vehicle is still in the parking power generation condition, the current carbon load of the DPF is monitored in real time, and the current carbon load of the DPF is compared with the second carbon load threshold value.

[0127] If the current carbon load of the particulate trap is less than the second carbon load threshold, it is determined that the particulate trap meets the micro-regeneration termination condition.

[0128] In the method provided by the embodiment of the present invention, when the current carbon load of the DPF is less than the second carbon load threshold, it is considered that the DPF meets the preset micro-regeneration termination condition. If the current carbon load of the DPF is not less than the second carbon load threshold, it is considered that the DPF does not meet the micro-regeneration termination condition.

[0129] exist Figure 1 On the basis of the method shown, the method provided in the embodiment of the present invention further includes:

[0130] If the estimated parking power generation duration does not meet the duration condition, parking power generation is performed based on a preset second power generation power to charge the vehicle battery and make the exhaust gas of the engine reach the required temperature for passive regeneration of the particulate filter; the second power generation power is higher than the first power generation power.

[0131] In the method provided by the embodiment of the present invention, the second power generation can be set in advance according to the power required by the engine when the actual DPF particulate matter is passively burned. The passive combustion of DPF particulate matter refers to the passive regeneration of DPF, that is, when the exhaust gas discharged by the engine normally works, it can naturally heat the particulate matter in the DPF to make it burn, thereby removing the particulate matter. If it is determined in the judgment process of step S103 that the estimated duration of parking power generation does not meet the preset duration condition, then according to the preset second power generation, the engine is controlled to drive the generator to generate electricity to perform parking power generation, thereby charging the vehicle battery. At the same time, when the engine performs parking power generation based on the second power generation, the temperature of the exhaust gas discharged by the engine will rise to the required temperature of the DPF passive regeneration, that is, the current exhaust gas of the engine will cause the accumulated particulate matter in the DPF to burn for carbon removal. It can be understood that, since the exhaust temperature needs to be increased by using the running state of the engine under this working condition, the second power generation is higher than the first power generation under the conventional parking power generation state.

[0132] Based on the method provided in the embodiment of the present invention, when the estimated parking power generation time does not meet the time condition, that is, it is not suitable to perform a regeneration operation (active regeneration) on the DPF, the engine power can be increased to increase the temperature of the engine exhaust, and the DPF can be decarbonized by passive regeneration. The carbon load of the DPF can be reduced without the user noticing, the normal use time of the DPF is extended, and the frequency of DPF overload is reduced, thereby reducing the frequency of parking regeneration by the user, which is beneficial to reducing the impact on the user's driving status and improving the user's driving experience.

[0133] exist Figure 1 On the basis of the method shown, in the method provided by the embodiment of the present invention, if in the judgment process of step S101, it is determined that the particulate filter of the vehicle does not meet the micro-regeneration triggering condition, parking power generation is performed based on the first power generation power to charge the vehicle battery.

[0134] In order to better illustrate the method provided by the embodiment of the present invention, based on the methods provided by the above embodiments and in combination with actual application scenarios, the embodiment of the present invention provides another method for regenerating a particulate filter under parking power generation conditions. Figure 3 As shown, the regeneration process of the particulate filter under the parking power generation condition provided by the embodiment of the present invention mainly includes:

[0135] When the vehicle's operating state triggers the parking power generation condition, it is determined whether the carbon load of the DPF meets the preset micro-regeneration condition, that is, whether the carbon load of the DPF is greater than a predetermined upper limit value (such as 3.0 g / L).

[0136] If the carbon load of the DPF does not meet the micro-regeneration conditions, parking power generation is performed based on the first power generation to charge the battery. When the battery's state of charge reaches the charging threshold of the parking power generation condition or the vehicle exits the parking power generation condition, the parking power generation process ends. The first power generation is a power generation set based on economic considerations, which is the normal power generation of the parking power generation condition.

[0137] If the carbon load of the DPF meets the micro-regeneration condition, that is, the carbon load is greater than the predetermined upper limit, the parking power generation time is estimated to obtain the estimated parking power generation time (that is, the estimated parking power generation time in the previous embodiment). For the estimation method of the parking power generation time, reference can be made to the previous embodiment for Figure 1 The description of step S102 of the method is not repeated here.

[0138] Determine whether the estimated parking power generation duration is greater than a preset duration threshold (such as 3 minutes). If the parking power generation duration is not greater than the duration threshold, parking power generation is performed based on the second power generation to increase the engine exhaust temperature during parking power generation to remove carbon from the DPF. The second power generation is greater than the first power generation. The second power generation is the power generation set based on the exhaust temperature under the engine running state to reach the DPF passive regeneration requirement temperature. It can also be understood as the power generation set for the purpose of accelerating the DPF carbon combustion.

[0139] If the estimated parking power generation duration is greater than the preset duration threshold, parking power generation is performed based on the first power generation, and the engine is controlled to perform post-processing thermal management. Through a predetermined control operation, the exhaust temperature is controlled to increase to a target value, and the DPF regeneration control operation is performed. In the process of controlling the exhaust temperature of the engine, the target value of the exhaust temperature is adjusted regularly according to the battery state of charge, that is, when the adjustment time point is reached, the current target value is determined according to the current battery state of charge, so as to control the exhaust temperature. When the battery state of charge gradually increases, the target value of the exhaust temperature is gradually reduced, that is, the higher the battery state of charge, the lower the target value of the exhaust temperature.

[0140] Real-time monitoring is performed to determine whether the carbon load of the DPF is less than a preset threshold. If the carbon load of the DPF is less than the preset threshold, the engine is controlled to stop post-processing thermal management, that is, the DPF regeneration control operation is terminated, and the parking power generation process is waited for to end.

[0141] If the carbon load of the DPF is not less than the preset threshold, the DPF regeneration continues until the parking power generation process is completed.

[0142] Based on the method provided by the embodiment of the present invention, when the parking power generation demand is generated, it can be determined whether to perform carbon removal treatment on the DPF based on the state of the whole vehicle. When carbon removal treatment is required, different power generation powers are selected for parking power generation according to the estimated parking power generation time, and it is selected whether to start thermal management to perform carbon removal on the DPF in different ways. When performing DPF regeneration through thermal management of the engine, the target temperature value of the exhaust temperature is adjusted in real time based on the state of charge of the battery. When the state of charge of the battery gradually increases and the parking power generation condition may be exited at any time, the target value of the engine exhaust temperature can be reduced, thereby cooling the temperature of the DPF in advance and avoiding thermal shock damage to the DPF caused by sudden exit from the parking power generation condition. The method provided by the embodiment of the present invention can use the parking power generation condition to perform carbon removal treatment on the DPF, which can reduce or eliminate the carbon load in the DPF, thereby reducing the frequency of the user performing DPF parking regeneration, which is conducive to improving the user's driving experience. At the same time, it can effectively avoid the problems of increased exhaust resistance caused by excessive carbon load of the DPF, reduced engine economy and power performance, etc.

[0143] and Figure 1 Corresponding to the method for regenerating a particulate filter under a parking power generation condition shown in FIG. 1 , an embodiment of the present invention further provides a device for regenerating a particulate filter under a parking power generation condition, for Figure 1 The specific implementation of the method shown in is shown in the structural diagram Figure 4 As shown, including:

[0144] The first judgment unit 301 is used to judge whether the particle collector of the vehicle meets the preset micro-regeneration triggering condition when it is determined that the vehicle enters the parking power generation working condition;

[0145] The duration evaluation unit 302 is used to evaluate the power generation duration of the vehicle under the parking power generation condition to obtain the estimated parking power generation duration if the particulate filter meets the micro-regeneration triggering condition;

[0146] The second judgment unit 303 is used to judge whether the estimated parking power generation time meets the preset time condition;

[0147] a regeneration control unit 304, configured to, if the estimated parking power generation duration meets the duration condition, perform parking power generation based on a preset first power generation to charge the vehicle battery, and control the exhaust temperature of the engine to regenerate the particulate filter;

[0148] The third judgment unit 305 is used to monitor in real time whether the particle trap meets the preset micro-regeneration termination condition;

[0149] The regeneration termination unit 306 is used to stop controlling the exhaust temperature of the engine and terminate the regeneration process of the particulate trap when it is monitored that the particulate trap meets the micro-regeneration termination condition.

[0150] By using the device provided in the embodiment of the present invention, the regeneration of the particulate filter DPF can be actively triggered when the vehicle is in the parking power generation condition. When the vehicle is in the normal parking state, the running state of the engine triggered by the parking power generation is used to perform the control operation of DPF regeneration and decarbonize the DPF, which can reduce the carbon load of the DPF without the user noticing, extend the normal use time of the DPF, reduce the frequency of DPF overload, and thus reduce the frequency of the user performing parking regeneration, which is conducive to reducing the impact on the user's driving state and improving the user's driving experience.

[0151] exist Figure 4 Based on the device shown, the device provided in the embodiment of the present invention can be further expanded into multiple units. The function of each unit can be found in the description of each embodiment provided in the previous text for the method of regenerating the particulate filter under the parking power generation condition, and no further examples will be given here.

[0152] An embodiment of the present invention further provides a storage medium, which includes stored instructions, wherein when the instructions are executed, the device where the storage medium is located is controlled to execute the method for regenerating a particulate filter under the parking power generation condition as described above.

[0153] The embodiment of the present invention further provides an electronic device, the structural diagram of which is shown in FIG. Figure 5 As shown, it specifically includes a memory 401 and one or more instructions 402, wherein the one or more instructions 402 are stored in the memory 401 and are configured to be executed by one or more processors 403 to perform the following operations:

[0154] When it is determined that the vehicle enters the parking power generation operating condition, determining whether the particle collector of the vehicle meets a preset micro-regeneration triggering condition;

[0155] If the particulate filter meets the micro-regeneration triggering condition, the power generation time of the vehicle under the parking power generation condition is evaluated to obtain an estimated parking power generation time;

[0156] Determining whether the estimated parking power generation duration meets a preset duration condition;

[0157] If the estimated parking power generation duration meets the duration condition, parking power generation is performed based on a preset first power generation to charge a vehicle battery, and the exhaust temperature of the engine is controlled to regenerate the particulate filter;

[0158] Real-time monitoring of whether the particle collector meets the preset micro-regeneration termination conditions;

[0159] When it is monitored that the particulate trap meets the micro-regeneration termination condition, the control of the exhaust temperature of the engine is stopped, and the regeneration process of the particulate trap is ended.

[0160] The electronic device in the embodiment of the present invention may be an ECU (Electronic Control Unit), a VCU (Vehicle Control Unit), an MCU (Micro Controller Unit), an HCU (Hybrid Control Unit), or the like.

[0161] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without creative work.

[0162] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0163] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for regenerating a particulate filter under parking power generation conditions, characterized in that: include: When it is determined that the vehicle enters the parking power generation operating condition, determining whether the particle collector of the vehicle meets a preset micro-regeneration triggering condition; If the particulate filter meets the micro-regeneration triggering condition, the power generation time of the vehicle under the parking power generation condition is evaluated to obtain an estimated parking power generation time; Determining whether the estimated parking power generation duration meets a preset duration condition; If the estimated parking power generation duration meets the duration condition, parking power generation is performed based on a preset first power generation to charge a vehicle battery, and the exhaust temperature of the engine is controlled to regenerate the particulate filter; Real-time monitoring of whether the particle collector meets the preset micro-regeneration termination conditions; When it is monitored that the particulate trap meets the micro-regeneration termination condition, the control of the exhaust temperature of the engine is stopped, and the regeneration process of the particulate trap is ended; The controlling of the exhaust temperature of the engine to regenerate the particle trap comprises: Determine an initial state of charge; the initial state of charge is the state of charge of the vehicle battery at the current time point; Determining an initial temperature target value according to the initial state of charge; Controlling the exhaust temperature of the engine to reach the initial temperature target value, and periodically adjusting the exhaust temperature of the engine according to a preset adjustment period to perform carbon removal treatment on the particulate trap; When at an adjustment time point of the preset adjustment cycle, determining the battery state of charge corresponding to the current adjustment time point; the battery state of charge corresponding to the current adjustment time point is the state of charge of the vehicle battery at the current adjustment time point; According to the battery state of charge corresponding to the current adjustment time point, the adjustment temperature target value corresponding to the current adjustment time point is determined, and the exhaust temperature of the engine is controlled to be adjusted from the current temperature value to the adjustment temperature target value; when the battery state of charge corresponding to the current adjustment time point is higher than the battery state of charge corresponding to the previous adjustment time point, the adjustment temperature target value is less than or equal to the current temperature value, and the current temperature value represents the adjustment temperature target value corresponding to the previous adjustment time point.

2. The method for regenerating a particulate filter under parking power generation conditions according to claim 1, characterized in that: The determining whether the particulate filter of the vehicle meets a preset micro-regeneration triggering condition includes: Determining whether the current carbon load of the particulate trap is greater than a preset first carbon load threshold; If the current carbon load of the particulate trap is greater than the first carbon load threshold, it is determined that the particulate trap meets the micro-regeneration triggering condition.

3. The method for regenerating a particulate filter under parking power generation conditions according to claim 1, characterized in that: The evaluating the power generation time of the vehicle under the parking power generation condition to obtain the estimated parking power generation time includes: Determining an actual state of charge corresponding to the vehicle battery; the actual state of charge is a current state of charge of the vehicle battery; Determining a battery capacity corresponding to the vehicle battery; Determining a target state of charge corresponding to the vehicle battery; the target state of charge represents an upper limit value of the state of charge for charging under a parking power generation condition; Determining a charging efficiency corresponding to the vehicle battery; Performing a difference operation on the target state of charge and the actual state of charge to obtain a first operation result; Performing a product operation on the first operation result and the battery capacity to obtain a second operation result; Dividing the second calculation result by the first generated power to obtain a third calculation result; The third calculation result is divided by the charging efficiency to obtain a fourth calculation result, and the fourth calculation result is used as the estimated parking power generation time.

4. The method for regenerating a particulate filter under parking power generation conditions according to claim 1, characterized in that: The determining whether the estimated parking power generation duration meets a preset duration condition includes: Determining whether the estimated parking power generation time is greater than a preset power generation time threshold; If the estimated parking power generation time is greater than the power generation time threshold, it is determined that the estimated parking power generation time meets the time condition.

5. The method for regenerating a particulate filter under parking power generation conditions according to claim 1, characterized in that: The real-time monitoring of whether the particle trap meets the preset micro-regeneration termination condition includes: monitoring whether the vehicle exits the parking power generation state; If the vehicle exits the parking power generation condition, determining that the particulate filter meets the micro-regeneration termination condition; If the vehicle has not exited the parking power generation operating state, determining whether the current carbon load of the particulate filter is less than a preset second carbon load threshold; If the current carbon load of the particulate trap is less than the second carbon load threshold, it is determined that the particulate trap meets the micro-regeneration termination condition.

6. The method for regenerating a particulate filter under parking power generation conditions according to claim 1, characterized in that: Also includes: If the estimated parking power generation duration does not meet the duration condition, parking power generation is performed based on a preset second power generation power to charge the vehicle battery and make the exhaust gas of the engine reach the required temperature for passive regeneration of the particulate filter; the second power generation power is higher than the first power generation power.

7. A device for regenerating a particulate filter under parking power generation conditions, characterized in that: include: A first judgment unit is used to judge whether the particulate filter of the vehicle meets a preset micro-regeneration triggering condition when it is determined that the vehicle enters a parking power generation operating state; a duration evaluation unit, configured to evaluate the power generation duration of the vehicle under the parking power generation condition to obtain an estimated parking power generation duration if the particulate filter meets the micro-regeneration triggering condition; A second judgment unit is used to judge whether the estimated parking power generation time meets a preset time condition; a regeneration control unit, configured to, if the estimated parking power generation duration meets the duration condition, perform parking power generation based on a preset first power generation to charge the vehicle battery, and control the exhaust temperature of the engine to perform a regeneration operation on the particulate filter; A third judgment unit is used to monitor in real time whether the particle trap meets a preset micro-regeneration termination condition; a regeneration termination unit, configured to stop controlling the exhaust temperature of the engine and terminate the regeneration process of the particulate trap when it is detected that the particulate trap meets the micro-regeneration termination condition; The regeneration control unit is specifically used for: Determine an initial state of charge; the initial state of charge is the state of charge of the vehicle battery at the current time point; Determining an initial temperature target value according to the initial state of charge; Controlling the exhaust temperature of the engine to reach the initial temperature target value, and periodically adjusting the exhaust temperature of the engine according to a preset adjustment period to perform carbon removal treatment on the particulate trap; When at an adjustment time point of the preset adjustment cycle, determining the battery state of charge corresponding to the current adjustment time point; the battery state of charge corresponding to the current adjustment time point is the state of charge of the vehicle battery at the current adjustment time point; According to the battery state of charge corresponding to the current adjustment time point, the adjustment temperature target value corresponding to the current adjustment time point is determined, and the exhaust temperature of the engine is controlled to be adjusted from the current temperature value to the adjustment temperature target value; when the battery state of charge corresponding to the current adjustment time point is higher than the battery state of charge corresponding to the previous adjustment time point, the adjustment temperature target value is less than or equal to the current temperature value, and the current temperature value represents the adjustment temperature target value corresponding to the previous adjustment time point.

8. A storage medium, characterized in that: The storage medium includes stored instructions, wherein when the instructions are executed, the device where the storage medium is located is controlled to execute the method for regenerating a particulate filter under a parking power generation condition as claimed in any one of claims 1 to 6.

9. An electronic device, characterized in that: The invention comprises a memory and one or more instructions, wherein the one or more instructions are stored in the memory and are configured to be executed by one or more processors to perform the method for regenerating a particulate filter under a parking power generation condition as described in any one of claims 1 to 6.

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