System and method for controlling a hybrid power system based on temperature zones and power demand

Abstract

Systems and methods for controlling a hybrid powertrain. For example, a computer-implemented method includes determining a system temperature zone of an aftertreatment system to be in a first temperature zone below a first temperature threshold, a second temperature zone from the first temperature threshold to a second temperature threshold, or a third temperature zone above the second temperature threshold; determining a power demand corresponding to operation of the hybrid powertrain to be in a first power demand zone if the power demand is below a power threshold, or a second power demand zone if the power demand is equal to or greater than the power threshold; and determining a control strategy based at least in part on the determined system temperature zone and the determined power demand.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to provisional application No. 63 / 073,166, filed on September 1, 2020, the entire contents of which are incorporated herein by reference. Technical Field

[0003] Some embodiments of this disclosure relate to hybrid vehicles. More specifically, some embodiments of this disclosure provide systems and methods for controlling a hybrid system based at least in part on the aftertreatment temperature range and power requirements of the hybrid system. Background Technology

[0004] With increasing efforts to limit greenhouse gas emissions from transportation, regulations concerning internal combustion engines are becoming increasingly stringent, particularly regarding nitrogen oxide (NOx) emissions. Vehicle electrification is considered a promising way to meet these regulations. However, for modern hybrid systems, significant amounts of NOx are generated during engine cold starts, during which the aftertreatment system is inactive. Aftertreatment systems typically include selective catalytic reduction (SCR) systems. To meet future low NOx emission standards, systems and methods for controlling hybrid systems to reduce NOx emissions are desired. Summary of the Invention

[0005] In various embodiments, a computer-implemented method for controlling a hybrid power system including an electric motor, a combustion engine, an aftertreatment system, and an electric heater coupled to the aftertreatment system includes: determining a system temperature zone of the aftertreatment system as being in: a first temperature zone below a first temperature threshold, a second temperature zone from the first temperature threshold to a second temperature threshold, or a third temperature zone above the second temperature threshold; determining a power demand corresponding to the operation of the hybrid power system as: being in a first power demand zone if the power demand is below a power threshold, or being in a second power demand zone if the power demand is equal to or greater than a power threshold; and determining a control strategy based at least in part on the determined system temperature zone and the determined power demand. In some examples, the control strategy includes a control command to set the hybrid power system to compressor mode when: the determined system temperature zone is in the first temperature zone and the determined power demand is zero, or the determined system temperature zone is in the first temperature zone and the determined power demand is in the first power demand zone. In some examples, the control strategy also includes a control command selected from: setting the hybrid power system to power distribution mode, setting the hybrid power system to motor operation mode, and setting the hybrid power system to engine operation mode.

[0006] In various embodiments, a system for controlling a hybrid power system including an electric motor, a combustion engine, an aftertreatment system, and an electric heater coupled to the aftertreatment system includes: a temperature zone determination module configured to determine a system temperature zone of the aftertreatment system as being in: a first temperature zone below a first temperature threshold, a second temperature zone from the first temperature threshold to a second temperature threshold, or a third temperature zone above the second temperature threshold; a power demand determination module configured to determine a power demand corresponding to operation of the hybrid power system as: being in a first power demand zone if the power demand is below a power threshold, or being in a second power demand zone if the power demand is equal to or greater than a power threshold; and a control strategy determination module configured to determine a control strategy based at least in part on the determined system temperature zone and the determined power demand. In some examples, the control strategy includes a control command that sets the hybrid power system to compressor mode when: the determined system temperature zone is in the first temperature zone and the determined power demand is zero, or the determined system temperature zone is in the first temperature zone and the determined power demand is in the first power demand zone. In some examples, the control strategy also includes a control command selected from the following control commands: setting the hybrid system to power distribution mode, setting the hybrid system to motor operation mode, and setting the hybrid system to engine operation mode.

[0007] In various embodiments, a non-transitory computer-readable medium storing instructions that, when executed by a processor, cause the processor to perform the following operations: determining a system temperature zone of the post-processing system as being in: a first temperature zone below a first temperature threshold, a second temperature zone from the first temperature threshold to a second temperature threshold, or a third temperature zone above the second temperature threshold; determining a power demand corresponding to the operation of the hybrid power system as: being in a first power demand zone if the power demand is below a power threshold, or being in a second power demand zone if the power demand is equal to or greater than a power threshold; and determining a control strategy based at least in part on the determined system temperature zone and the determined power demand. In some examples, the control strategy includes a control command to set the hybrid power system to compressor mode when: the determined system temperature zone is in the first temperature zone and the determined power demand is zero, or the determined system temperature zone is in the first temperature zone and the determined power demand is in the first power demand zone. In some examples, the control strategy also includes a control command selected from: setting the hybrid power system to power distribution mode, setting the hybrid power system to motor operation mode, and setting the hybrid power system to engine operation mode. Attached Figure Description

[0008] Figure 1This is a simplified system diagram depicting a hybrid power system 10 according to some embodiments of the present disclosure.

[0009] Figure 2 This is a simplified flowchart illustrating a method 30 for determining a control strategy for a hybrid power system according to some embodiments of the present disclosure.

[0010] Figure 3 It is a graph depicting the relationship between the efficiency of the selective catalytic reduction (SCR) system in the aftertreatment system and temperature.

[0011] Figure 4 It is a description of achieving Figure 2 The block diagram of the control system 40 for controlling the hybrid power system is described in the method 30.

[0012] Figure 5 It is a description Figure 4 The timing diagram of the control system is shown, which illustrates multiple modes.

[0013] Figure 6 It is a graph depicting the relationship between the efficiency of the selective catalytic reduction (SCR) system in the aftertreatment system and temperature.

[0014] Figure 7A , Figure 7B and Figure 7C It is a diagram depicting the control strategies of a hybrid power system based on state of charge and power demand when it is in different SCR temperature zones.

[0015] Figure 8A and Figure 8B It is a diagram depicting the control strategies of a hybrid power system based on state of charge and power demand when it is in different SCR temperature zones.

[0016] Figure 9 It is a description Figure 4 The timing diagram of the control system shows the variation of the hybrid system mode at different vehicle speeds and SCR temperatures.

[0017] Figure 10 It is a description Figure 4 The timing diagram of the control system shows the variation of the hybrid system mode at different vehicle speeds and SCR temperatures.

[0018] It should be understood that this disclosure is not limited to the details or methods set forth in the specification or illustrated in the drawings, i.e., the number of temperature zones, the number of power zones, etc. Detailed Implementation

[0019] Some embodiments of this disclosure relate to hybrid vehicles. More specifically, some embodiments of this disclosure provide systems and methods for controlling a hybrid system based at least in part on the temperature range and power requirements of the hybrid system.

[0020] Figure 1 This is a simplified system diagram depicting a hybrid power system 10 according to some embodiments of the present disclosure. The hybrid power system 10 may be a hybrid power system of a hybrid vehicle and includes a temperature sensor 11, an accelerometer 12, a system control unit (SCU) 13, an aftertreatment system 14, a combustion engine 15, an electric motor 16, an electric heater 17, and an energy storage system 18. The temperature sensor 11 (e.g., a physical or virtual sensor) may be configured to determine the system temperature of the aftertreatment system 14. The accelerometer 12 (e.g., vehicle throttle) may be configured to determine the vehicle's acceleration. The SCU 13 may be configured to house a control system and implement a method for controlling the hybrid power system (e.g., via switches and / or actuators) by controlling the combustion engine 15, the electric heater 17, and the electric motor 16 (see [link to relevant documentation]). Figure 2SCU 13 may include a control strategy determination module configured to determine control commands, including setting the mode of combustion engine 15, electric motor 16, and / or electric heater 17. SCU 13 may include a mode setting module configured to change the mode of combustion engine 15, electric motor 16, and / or electric heater 17. Aftertreatment system 14 is configured to convert regulated pollutant NOx into H2O and may include a selective catalytic reduction (SCR) system 19. Hybrid system 10 may also include a valve opening system 20 configured to open to allow heated air to be delivered from combustion engine 15 to aftertreatment system 14. Although valve opening system 20 is shown as a separate component, valve opening system 20 or portions thereof may be integrated with combustion engine 15, such as an exhaust valve. A combustion engine 15 (e.g., a two-stroke or four-stroke engine) is configured to provide power to accelerate the vehicle under the control of the SCU 13 (e.g., via engine control unit 21), operate as a compressor to provide heated air to the aftertreatment system 14, and optionally provide energy for charging the energy storage system 18. An electric motor 16 is configured to provide power to accelerate the vehicle and drive (e.g., rotate the crankshaft) the combustion engine 15 in compressor mode. The electric motor 16 may operate as a motor and / or generator. An electric heater 17 (e.g., an exhaust heater or an electrocatalytic converter heater) is configured to optionally provide heat to the aftertreatment system 14. The heater energy may be provided by the energy storage system 18 or by electricity generated by the electric motor 16. The electric heater may be located external to the aftertreatment system or may be an internal component of the aftertreatment system. The energy storage system 18 (e.g., battery, fuel cell, supercapacitor, mobile cell) is configured to provide electrical power to the electric motor 16 and is connected to the SCU 13 so that the SCU 13 can monitor the energy level of the energy storage system.

[0021] Figure 2 This is a flowchart of a method 30 for determining a control strategy for a hybrid power system (e.g., hybrid power system 10) according to some embodiments of the present disclosure. Method 30 includes: at 31, determining the system temperature range in which the after-treatment system (e.g., after-treatment system 14) of the hybrid power system is located; at 32, determining the power demand corresponding to the operation of the hybrid power system; and at 33, determining a control strategy based at least in part on the determined system temperature range and the determined power demand.

[0022] At point 31, determining the system temperature zone in which the post-processing system exists involves using a temperature sensor (e.g., temperature sensor 11) to measure the system temperature or receiving the measured temperature of the post-processing system. The system temperature can be the temperature of the SCR system (e.g., SCR system 19) of the post-processing system (e.g., post-processing system 14). Determining the system temperature zone involves comparing the system temperature with thresholds defining the zone boundaries. In one example, there are three zones defined by two thresholds. Figure 3 As shown, if the system temperature is below a first temperature threshold 51, the system temperature zone is the first temperature zone; if the system temperature is between the first temperature threshold 51 and a second higher temperature threshold 52, the system temperature zone is the second temperature zone; and if the system temperature is above the second temperature threshold 52, the system temperature zone is the third temperature zone. The second temperature zone may include the temperature at which the SCR system operates at optimal conversion efficiency. Additional temperature zones may be defined in conjunction with additional thresholds. In some embodiments, method 30 further includes determining the conversion efficiency of the post-processing system or the SCR system of the post-processing system. For example, determining the conversion efficiency includes looking up the efficiency and temperature lookup table, which may correspond to, for example... Figure 3 The efficiency versus temperature curves are shown.

[0023] At point 32, determining the power demand corresponding to the operation of the hybrid system (e.g., hybrid system 10) includes determining the acceleration input of the vehicle in which the hybrid system is installed. For example, the power demand may be determined to be zero, in a first power demand region below a power threshold and greater than zero, or in a second power demand region greater than or equal to the power threshold. The acceleration input may correspond to movement of the accelerator pedal, or may be determined, for example, using an accelerometer (e.g., accelerometer 12) based on sensed movement; the accelerometer may be connected to sense the movement of the accelerator pedal or the vehicle. For example, when the power demand is determined to be zero, the vehicle does not accelerate; when the power demand is determined to be in the first power demand region, the vehicle accelerates with low acceleration; and when the power demand is determined to be in the second power demand region, the vehicle accelerates with high acceleration.

[0024] To help avoid cold starts (during which the aftertreatment system 14 of the hybrid system 10 is inactive), the SCU 13 provides instructions according to method 30 to the combustion engine 15, electric motor 16, and / or electric heater 17 of the hybrid system 10, at least in part, based on system temperature and power requirements, to preheat the aftertreatment system 14. For example, when the system temperature is low (e.g., below...). Figure 3 or Figure 6When the first temperature threshold is reached, SCU 13 instructs the electric heater to turn on to heat the exhaust flow and thus the aftertreatment system. If the power demand is zero or low (e.g., in a first power zone below the power threshold), SCU 13 sets the electric motor 16 to drive the combustion engine 15 as a compressor, optionally sets the electric heater to turn on, and operates the valve to open system 20 so that the heated airflow from the combustion engine 15 can heat the aftertreatment system 14.

[0025] At point 33, determining the control strategy, at least in part, based on the determined system temperature range and the determined power demand, includes determining the control strategy to include one of the following control commands: setting the hybrid system (e.g., hybrid system 10) to a power distribution mode, setting the hybrid system to a motor operation mode, setting the hybrid system to an engine operation mode, setting the hybrid system to a compressor mode, setting the hybrid system to an engine charging mode, setting the hybrid system's electric heater to on, and / or setting the hybrid system's electric heater to off. This setting can be performed by the hybrid system's system control unit (e.g., SCU 13), for example, by controlling one or more clutches of the vehicle, and controlling the hybrid system's combustion engine, electric motor, heater, and / or valves.

[0026] In various implementations, the control commands for setting the hybrid system to a power distribution mode include distributing power between the engine and the motor, for example, by setting the electric motor and the engine to operate at different power levels to deliver power at least equal to or greater than the determined power demand. In the power distribution mode, the combustion engine may be set to operate in a high-efficiency region and / or a low-emission region, for example, based on a temperature zone and / or power demand.

[0027] In some examples, the control command for setting the hybrid system to motor operation mode includes setting the electric motor to deliver power at least equal to or greater than the determined power requirement. In some examples, the control command for setting the hybrid system to engine operation mode includes setting the combustion engine to deliver power at least equal to or greater than the determined power requirement.

[0028] In some examples, the control command for setting the hybrid system to compressor mode includes setting the combustion engine to operate as a compressor to heat the aftertreatment system. In some examples, the control command for setting the hybrid system to compressor mode includes setting a valve opening system (e.g., valve opening system 20) to open to allow heated air to travel from the engine to the aftertreatment system. In some examples, the control command for setting the hybrid system to engine charging mode includes setting the combustion engine to deliver power greater than the determined power demand required to charge an energy storage system (e.g., energy storage system 18) connected to the electric motor. For example, the surplus power generated is converted into electrical energy by the electric motor, which acts as a vehicle generator, to charge the energy storage system.

[0029] In some implementations, when the determined system temperature zone is in a first temperature zone and the determined power demand is zero or in a first power demand zone, at point 33, the control strategy includes the following control commands: setting the hybrid system to compressor mode to heat the aftertreatment system, setting the electric heater to off, and / or setting the hybrid system to motor operation mode to deliver power at least greater than or equal to the determined power demand.

[0030] In some implementations, when the determined system temperature zone is in a first temperature zone and the determined power demand is zero or in a first power demand zone, at point 33, the control strategy includes the following control commands: setting the hybrid system to compressor mode to heat the aftertreatment system, setting the electric heater of the hybrid system to turn on to heat the aftertreatment system, and / or setting the hybrid system to motor operation mode to deliver power at least greater than or equal to the determined power demand.

[0031] In some implementations, when the determined system temperature zone is in a first temperature zone and the determined power demand is in a second power demand zone, at point 33, the control strategy includes the following control commands: setting the hybrid power system to a power distribution mode to deliver power at least greater than or equal to the determined power demand, and / or setting the electric heater of the hybrid power system to turn on to heat the aftertreatment system.

[0032] In some implementations, when the determined system temperature zone is in the second temperature zone and the determined power demand is in the first power demand zone, at point 33, the control strategy includes the following control commands: setting the hybrid system to a power distribution mode or a motor operation mode to deliver power at least greater than or equal to the determined power demand, and / or setting the electric heater of the hybrid system to be turned on.

[0033] In some implementations, when the determined system temperature zone is in the second temperature zone and the determined power demand is in the second power demand zone, at point 33, the control strategy includes the following control commands: setting the hybrid system to a power distribution mode or engine operation mode to deliver power at least greater than or equal to the determined power demand, and / or setting the electric heater of the hybrid system to be turned on.

[0034] In some implementations, when the determined system temperature zone is in the third temperature zone, at point 33, the control strategy includes the following control commands: setting the hybrid system to one of a power distribution mode and an engine operation or motor operation mode to optimize overall vehicle fuel efficiency to deliver power greater than or equal to the determined power demand; and / or setting the electric heater of the hybrid system to off.

[0035] In some implementations, the computer-implemented method 30 further includes determining an energy level corresponding to an energy storage system (e.g., energy storage system 18) connected to the electric motor, and wherein the step of determining a control strategy is also based on the determined energy level. In some examples, when the determined energy level is below an energy threshold, at 33, the control strategy includes a control command to set the hybrid system to an engine charging mode to recharge the energy storage system. The energy threshold may be a preset value predetermined by the user or manufacturer and may be customized via a control interface, such as the control interface of a vehicle equipped with both an energy storage system and a hybrid system.

[0036] Figure 4 It is a description used to achieve Figure 2The block diagram of the method 30 described herein is for controlling a control system 40 of a hybrid power system (e.g., hybrid power system 10). The control system 40 includes: a temperature zone determination module 41 configured to determine the system temperature zone in which the aftertreatment system operates; a power demand determination module 42 configured to determine the power demand corresponding to the operation of the hybrid power system; and a control strategy determination module 43 configured to determine a control strategy based at least in part on the determined system temperature zone and the determined power demand. The control system 40 may be stored in a system control unit (e.g., system control unit 13). In some examples, the control system 40 is configured to regulate the aftertreatment system of a hybrid power system comprising an electric motor and a combustion engine, and may be part of the hybrid power system or a separate unit. The control system 40 can be used with various hybrid power systems, including mild hybrid systems, strong hybrid systems, parallel architecture hybrid systems, series architecture hybrid systems, series-parallel architecture hybrid systems, and / or range-extended hybrid systems. In some examples, the control system 40 is more effective in reducing NOx emissions from strong hybrid systems than in reducing NOx emissions from mild hybrid systems. For example, compared to a mild hybrid system that uses only a small amount of electric motors (such as an assisted combustion engine), a strong hybrid system that uses more electric motors during vehicle operation can reduce NOx emissions to a greater extent by adjusting the control system 40.

[0037] In various examples, control system 40 is configured to regulate the SCR system or other components of the aftertreatment system, for example, to raise the temperature of the SCR system or other components before fuel injection into the hybrid system. In some examples, control system 40 is configured to assist in regulating the aftertreatment system to operate at a desired temperature to achieve optimal conversion efficiency (see...). Figure 3 or Figure 6 In some examples, control system 40 is configured to reduce NOx emissions by determining and implementing a control strategy to heat the aftertreatment system to avoid cold starts. The vehicle's NOx emissions can be represented by the system output NOx (SONOx). In various examples, control system 40 is configured to reduce SONOx by adjusting the aftertreatment system to improve SCR conversion efficiency, such that a larger amount of NOx emissions from the vehicle engine is converted into less harmful molecules. In some examples, control system 40 is configured to control a valve opening system (e.g., valve opening system 20) that is configured to open between the combustion engine and the aftertreatment system to allow heated air from the combustion engine in compressor mode to flow into and thereby heat the aftertreatment system.

[0038] Figure 5 It is a description Figure 4 The timing diagram of the control system illustrates the variation of the hybrid system mode at different vehicle speeds and SCR temperatures. As shown, the control system (e.g., control system 40) is configured to execute a method (e.g., method 30) for determining a control strategy to switch the hybrid system between compressor mode, power distribution mode, engine charging mode, and motor operating mode. As shown, the hybrid system mode is selected at least based on the system's temperature and / or power demand, which can be represented by the vehicle's acceleration, such as... Figure 5 The vehicle speed curve is shown in the figure. In this example, it is desirable to maintain the SCR temperature above a first temperature threshold to achieve optimal SCR conversion efficiency. Therefore, when the SCR temperature is below the first temperature threshold, the control strategy includes setting the hybrid system to a mode configured as a heating aftertreatment system.

[0039] As shown in the figure, during the first time period, when the temperature of the SCR system is below a first temperature threshold 51 and the power demand of the hybrid system 10 is zero or nearly zero, the control strategy includes setting the hybrid system to compressor mode and / or setting the electric heater 17 to turn on to heat the aftertreatment system. In compressor mode, the electric motor of the hybrid system can drive the combustion engine, which acts as a compressor, to heat the air used to heat the aftertreatment system. Operating the combustion engine as a compressor requires closing the intake and exhaust valves of the combustion chamber, then rotating the crankshaft to move the piston from bottom dead center to top dead center in the combustion chamber, thereby compressing the air enclosed in the combustion chamber to increase the air temperature, and then opening the exhaust valve to allow the compressed (and heated) air to escape from the combustion chamber. During the second time period, when the temperature of the SCR system is below the first temperature threshold and the power demand is high, the control strategy includes setting the hybrid system to power distribution mode and setting the electric heater to turn on to moderately heat the aftertreatment system. In power distribution mode, both the electric motor and the combustion engine operate to provide power for vehicle acceleration. During operation, the combustion engine delivers heated exhaust gases to the aftertreatment system to further help raise the SCR temperature. In the third time period, when the SCR system temperature exceeds a first temperature threshold and power demand is high, the control strategy includes setting the hybrid system to engine charging mode and turning off the electric heater. In engine charging mode, the electric motor acts as a generator, and the combustion engine operates at the required capacity to accelerate the vehicle and provide energy (e.g., the electric motor acts as a generator) to charge the energy storage system connected to the electric motor. In the fourth time period, when the SCR system temperature exceeds the first temperature threshold and power demand is low, the control strategy includes setting the hybrid system to motor operation mode and turning off the electric heater. In motor operation mode, the combustion engine is turned off, and the electric motor provides all the power required to accelerate the vehicle. With the combustion engine and electric heater turned off, as... Figure 5 As shown, this can help prevent the SCR system from getting too hot (e.g., above the second temperature threshold, see...). Figure 3 In the fifth time period, when the SCR system temperature exceeds the third temperature threshold and power demand is high, the control strategy includes setting the hybrid system to power distribution mode and turning off the electric heater. Alternatively, the hybrid system can be set to pure motor mode, depending on the instantaneous power demand.

[0040] In some embodiments, the disclosed systems and methods achieve extended high SCR conversion efficiency times, improved vehicle fuel efficiency, reduced NOx emissions, and reduced fuel consumption during operation by adjusting one or more control commands associated with a control strategy. For example, the systems and methods can adjust one or more control commands to achieve an optimized powertrain efficiency management strategy by adjusting the vehicle's hybrid system mode (e.g., power distribution, engine operation, motor operation, engine charging) to preheat the hybrid system's aftertreatment system when the system temperature of the aftertreatment system is low. In some examples, the hybrid system further improves vehicle fuel efficiency and reduces NOx and other emissions by taking into account the temperature of the aftertreatment system to maintain high SCR conversion efficiency, thereby reducing not only NOx emissions but also fuel consumption. The disclosed systems and methods can utilize hybrid functionality and aftertreatment system information to determine powertrain control strategies to help regulate the temperature of the aftertreatment system and reduce fuel consumption and emissions.

[0041] Figure 6 This is a graph depicting the relationship between the efficiency and temperature of the selective catalytic reduction (SCR) system in the aftertreatment system. Based at least in part on SCR efficiency, the SCR temperature can be divided into four zones, as shown in the figure. In each zone, different hybrid system modes can be set as part of a control strategy to help regulate the SCR temperature and reduce fuel consumption. In the first temperature zone, where the SCR temperature is low and the SCR conversion efficiency is low, a control strategy configured to help preheat the SCR and / or reduce engine emissions (e.g., NOx) can be employed. In the second temperature zone, where the SCR temperature is slightly below the desired threshold temperature and the conversion efficiency is slightly below the target threshold efficiency, a control strategy configured to help preheat the SCR and / or reduce engine emissions (e.g., NOx) can be employed. In the third temperature zone, where the SCR temperature is above the desired threshold temperature and the conversion efficiency is good or satisfactory, a control strategy configured to help maintain the SCR temperature and improve overall system fuel efficiency can be employed. In the fourth temperature zone, where the SCR temperature is significantly above the desired threshold temperature and the conversion efficiency is reduced due to overheating conditions, a control strategy configured to help reduce the SCR temperature can be employed.

[0042] In some examples, when the SCR temperature is below the lower limit of the target temperature (e.g., in the first and second temperature zones), control strategies may include setting the hybrid system to engine charging mode to help preheat the aftertreatment system, setting the hybrid system to generator mode and turning on the electric heater to preheat the aftertreatment system, setting the hybrid system to motor operation mode (e.g., EV mode) to avoid generating EONOx, and setting it to engine cylinder deactivation mode to help maintain the temperature of the aftertreatment system. In some examples, when the SCR temperature is above the upper limit of the target temperature (e.g., in the fourth temperature zone), control strategies may include setting the hybrid system to power distribution mode to reduce engine load or setting it to generator mode to blow cold air to help lower the SCR temperature. When in generator mode, the vehicle may be stationary, and the combustion engine provides power to charge the battery. In EV mode, the battery provides auxiliary power and captures regenerative energy (e.g., in a mild hybrid system) or operates its electric motor to propel the vehicle. When in engine charging mode, the vehicle is driving, and the combustion engine provides additional power to charge the battery. When in power distribution mode, the vehicle is in motion, and power is distributed between the combustion engine and the electric motor to propel the vehicle.

[0043] Return to Figure 2 Method 30, at point 31, determines the system temperature zone by comparing the system temperature with thresholds defining the zone boundaries. In one example, there are four zones defined by three thresholds. Figure 6 As shown, if the system temperature is below a first temperature threshold 61, the system temperature zone is the first temperature zone; if the system temperature is between the first temperature threshold 61 and a second higher temperature threshold 62, the system temperature zone is the second temperature zone; if the system temperature is between the second temperature threshold 62 and a third higher temperature threshold 63, the system temperature zone is the third temperature zone; and if the system temperature is above the third temperature threshold 63, the system temperature zone is the fourth temperature zone. The first temperature zone may include the temperature at which the SCR system operates with undesirable low conversion efficiency. The third temperature zone may include the temperature at which the SCR system operates with optimal conversion efficiency. Additional temperature zones may be defined in conjunction with additional thresholds. In some embodiments, method 30 further includes determining the conversion efficiency of the post-processing system or the SCR system of the post-processing system. For example, determining the conversion efficiency includes using an efficiency and temperature lookup table, which may correspond to, for example... Figure 6 The efficiency versus temperature curves are shown.

[0044] Return to Figure 2 Method 30, when the determined system temperature range is within Figure 6When the SCR temperature is in the first or second temperature zone, at point 33, the control strategy includes the following control commands: setting the hybrid system to compressor mode to heat the aftertreatment system, setting the hybrid system's electric heater to on to heat the aftertreatment system, and / or setting the combustion engine to off. In some examples, when the SCR temperature is in the first and / or second temperature zone, the control strategy includes setting the hybrid system to EV mode to avoid NOx generation, setting the hybrid system to "engine as compressor" mode and setting the electric heater to on, setting the hybrid system to generator mode and setting the electric heater to on, setting the hybrid system to power distribution mode and setting the electric heater to on, or setting the hybrid system to engine charging mode and setting the electric heater to on. In some examples, when the SCR temperature is in the third temperature zone, the control strategy includes setting the hybrid system to EV mode to avoid NOx generation, setting the hybrid system to generator mode and turning on the electric heater, setting the hybrid system to engine-only mode, setting the hybrid system to engine-charging mode and turning off the electric heater, or setting the hybrid system to power-sharing mode and turning off the electric heater. In some examples, when the SCR temperature is in the fourth temperature zone, the control strategy includes setting the hybrid system to generator mode and turning off the electric heater, setting the hybrid system to power-sharing mode and turning off the electric heater, setting the hybrid system to "engine as compressor" mode and turning off the electric heater, or setting the hybrid system to dynamic mode and / or combined mode.

[0045] Figure 7A , Figure 7B and Figure 7CThis diagram illustrates the control strategies of a hybrid power system with positive power demand based on state of charge (SOC) and power demand when operating in different SCR temperature zones. When the SCR temperature is in a first or second temperature zone, the control strategy may include: setting the hybrid system to power distribution mode and turning on the electric heater when the power demand is high and the SOC is between a first and a third SOC threshold; setting the hybrid system to engine charging mode and turning on the electric heater when the power demand is low and the SOC is between the first and third SOC thresholds; setting the hybrid system to "engine as compressor" mode and turning on the electric heater when the power demand is zero and the SOC is above a second SOC threshold; and setting the hybrid system to generator mode and turning on the electric heater when the power demand is zero and the SOC is below a second SOC threshold. When the SCR temperature is in the third temperature zone, the control strategy may include: setting the hybrid system to power distribution mode when power demand is high and the state of charge (SOC) is between the first and third SOC thresholds; setting the hybrid system to engine-only mode when power demand is moderate and the SOC is between the first and third SOC thresholds; setting the hybrid system to engine-charging mode when power demand is low and the SOC is between the first and third SOC thresholds; setting the hybrid system to EV mode when power demand is zero and the SOC is above the second SOC threshold; and setting the hybrid system to generator mode and turning on the electric heater when power demand is zero and the SOC is below the second SOC threshold. In some examples, when the SCR temperature is in the third temperature zone, the control system is configured to select the hybrid system mode to improve fuel efficiency, and efficiency may be further improved via CDA and / or EEVO engine technology. When the SCR temperature is in the fourth temperature zone, the control strategy may include setting the hybrid system to power distribution mode when the power demand is greater than zero and the state of charge is between the first SOC threshold and the third SOC threshold; setting the hybrid system to generator mode when the power demand is zero and the state of charge is lower than the third SOC threshold; and setting the hybrid system to "engine as compressor" mode when the power demand is zero and the state of charge is higher than the third SOC threshold.

[0046] Figure 8A and Figure 8BThis diagram depicts the control strategies of a hybrid power system with negative power demand based on state of charge (SOC) and power demand when operating in different SCR temperature zones. When the SCR temperature is in a first or second temperature zone, the control strategy may include: setting the hybrid system to motoring mode and turning on the electric heater when the power demand is low and the SOC is between a first and a third SOC threshold; setting the hybrid system to power-sharing mode and turning on the electric heater when the power demand is high and the SOC is below the third SOC threshold; and setting the hybrid system to motoring mode, turning on the electric heater, and turning on the service brake when the power demand is high and the SOC is above the third SOC threshold. In various examples, the motor acts as a generator to capture regenerative braking energy and store the captured energy in an energy storage system. When the SCR temperature is in the third or fourth temperature zone, the control strategy may include: setting the hybrid system to engine electric rotation mode when the power demand is low and the state of charge (SOC) is between the first and third SOC thresholds; setting the hybrid system to power distribution mode when the power demand is high and the SOC is below the third SOC threshold, and / or setting the electric motor to act as a generator to capture regenerative braking energy and store the captured energy in the energy storage system; and setting the hybrid system to engine electric rotation mode and the service brake to be engaged when the power demand is high and the SOC is above the third SOC threshold. In some examples, such as when the hybrid system does not include a clutch, when the power demand is negative, the control system is configured to control the hybrid system to first meet the power demand via engine electric rotation, and when the power demand is below the electric rotation curve, the control system is configured to control the hybrid system to first use the engine's electric rotation power and then use the electric motor to meet the remaining power. In other examples, such as when the hybrid system includes a clutch, the control system is configured to disengage the clutch and control the motor generator to capture regenerative braking energy when the power demand is negative, and to engage the clutch and control the engine to engage to meet the remaining power when the power demand is below the MG generator curve.

[0047] Figure 9 It is a description Figure 4The timing diagram of the control system illustrates the variation of the hybrid system mode at different vehicle speeds and SCR temperatures. As shown, the control system (e.g., control system 40) is configured to execute a method (e.g., method 30) for determining a control strategy to switch the hybrid system between a motor operating mode, a power distribution mode, an engine charging mode, and an engine-only mode. The motor operating mode may be referred to as the EV mode. As shown, the hybrid system mode is selected at least based on the system's temperature and / or power demand, which can be represented by the vehicle's acceleration, such as... Figure 9 The vehicle speed curve is shown in the figure. In this example, it is desirable to maintain the SCR temperature above a first temperature threshold of 91 (e.g., corresponding to...). Figure 3 First temperature threshold 51 Figure 6 The first temperature threshold 61 or Figure 6 The second temperature threshold 62) is used to achieve optimal SCR conversion efficiency. Therefore, when the SCR temperature is below the first temperature threshold 91, the control strategy includes setting the hybrid system to a mode configured as a heating aftertreatment system. In some examples, the control system is configured to use EV mode to reduce or avoid NOx generation when the SCR temperature is within the first temperature zone (e.g., during cold start). The control system can control the hybrid system to achieve a desired turbine outlet temperature (TOT) point to generate additional power to charge the battery during periods of low load (e.g., power demand) and under suitable vehicle movement conditions. The control system can set the hybrid system to power distribution or generator mode to avoid excessively high SCR temperatures. The control system can set the hybrid system to EV mode to maintain the SCR temperature at a desired warm temperature.

[0048] As shown in the figure, during a first time period, when the temperature of the SCR system is below a first temperature threshold 91 and the power demand of the hybrid system 10 is zero or nearly zero, the control strategy includes setting the hybrid system to motor operation mode to reduce or avoid NOx generation, for example, during cold starts. During a second time period, when the temperature of the SCR system is below the first temperature threshold 91 and the power demand is moderate, the control strategy includes setting the hybrid system to engine charging mode to enable the combustion engine to operate at the required capacity to accelerate the vehicle and provide energy (e.g., the electric motor acts as a generator) to charge the energy storage system connected to the electric motor. During a third time period, when the temperature of the SCR system is approximately the first temperature threshold and the power demand is very low or close to zero, the control strategy includes setting the hybrid system to motor operation mode to reduce or avoid NOx generation. During a fourth time period, when the temperature of the SCR system is approximately the first temperature threshold and the power demand is moderate, the control strategy includes setting the hybrid system to engine charging mode to meet acceleration requirements. In the fifth time period, when the SCR system temperature is above the first temperature threshold 91 and the power demand is zero or near zero, the control strategy includes setting the hybrid system to motor operation mode to reduce or avoid NOx generation. In the sixth time period, when the SCR system temperature is above the first temperature threshold 91 and the power demand is moderate or high, the control strategy includes setting the hybrid system to engine-only mode to meet acceleration requirements. In the seventh time period, when the SCR system temperature is moderately above the first temperature threshold 91 and the power demand is high or moderate, the control strategy includes setting the hybrid system to power distribution mode, causing both the electric motor and the combustion engine to operate to provide power for vehicle acceleration.

[0049] Figure 10 It is a description Figure 4 The timing diagram of the control system illustrates the variation of the hybrid system mode at different vehicle speeds and SCR temperatures. As shown, the control system (e.g., control system 40) is configured to execute a method (e.g., method 30) for determining a control strategy to switch the hybrid system between compressor mode, engine charging mode, motor operating mode, engine-only mode, and power distribution mode. The motor operating mode can be referred to as the EV mode. As shown, the hybrid system mode is selected at least based on the system's temperature and / or power demand, which can be represented by the vehicle's acceleration, such as... Figure 10 The vehicle speed curve is shown in the figure. In this example, it is desirable to maintain the SCR temperature above a first temperature threshold of 101 (e.g., corresponding to...). Figure 3 The first temperature threshold 51 or Figure 6The second temperature threshold 62) is used to obtain optimal SCR conversion efficiency. Therefore, when the SCR temperature is below the first temperature threshold 101, the control strategy includes setting the hybrid system to a mode configured as a heating aftertreatment system. In some examples, the control system is configured to set the hybrid system to compressor mode and turn on the electric heater to quickly heat the SCR when the SCR temperature is within the first temperature range (e.g., during a cold start when the vehicle is stationary). When the vehicle is moving, and the SCR temperature is within the first temperature range, the control system can set the hybrid system to engine charging mode and turn on the electric heater to continue heating the SCR. The control system can also set the hybrid system to EV mode to avoid the generation of EONOx and therefore SONOx.

[0050] As shown in the figure, during a first time period, when the temperature of the SCR system is below a first temperature threshold 101 and the power demand of the hybrid system 10 is zero or nearly zero, the control strategy includes setting the hybrid system to compressor mode and / or setting the electric heater 17 to turn on to heat the aftertreatment system, for example, during a cold start. During a second time period, when the temperature of the SCR system is below the first temperature threshold 101 and the power demand is moderate, the control strategy includes setting the hybrid system to engine charging mode to enable the combustion engine to operate at the required capacity to accelerate the vehicle and provide energy (e.g., the electric motor acts as a generator) to charge the energy storage system connected to the electric motor. During a third time period, when the temperature of the SCR system is above the first temperature threshold and the power demand is very low or close to zero, the control strategy includes setting the hybrid system to motor operation mode to reduce or avoid NOx generation and help lower the temperature of the SCR system. During a fourth time period, when the temperature of the SCR system is above the first temperature threshold and the power demand is moderate, the control strategy includes setting the hybrid system to engine charging mode to meet acceleration requirements. In the fifth time period, when the SCR system temperature is above the first temperature threshold 101 and the power demand is zero or nearly zero, the control strategy includes setting the hybrid system to motor operation mode to reduce or avoid NOx generation. In the sixth time period, when the SCR system temperature is above the first temperature threshold 101 and the power demand is moderate or high, the control strategy includes setting the hybrid system to engine-only mode to meet acceleration requirements. In the seventh time period, when the SCR system temperature is moderately above the first temperature threshold 101 and the power demand is high or moderate, the control strategy includes setting the hybrid system to power distribution mode, causing both the electric motor and the combustion engine to operate to provide power for vehicle acceleration.

[0051] In various embodiments, a computer-implemented method for controlling a hybrid power system including an electric motor, a combustion engine, an aftertreatment system, and an electric heater coupled to the aftertreatment system includes: determining a system temperature zone of the aftertreatment system as being in: a first temperature zone below a first temperature threshold, a second temperature zone from the first temperature threshold to a second temperature threshold, or a third temperature zone above the second temperature threshold; determining a power demand corresponding to the operation of the hybrid power system as: being in a first power demand zone if the power demand is below a power threshold, or being in a second power demand zone if the power demand is equal to or greater than a power threshold; and determining a control strategy based at least in part on the determined system temperature zone and the determined power demand. In some examples, the control strategy includes a control command to set the hybrid power system to compressor mode when: the determined system temperature zone is in the first temperature zone and the determined power demand is zero, or the determined system temperature zone is in the first temperature zone and the determined power demand is in the first power demand zone. In some examples, the control strategy also includes a control command selected from: setting the hybrid power system to power distribution mode, setting the hybrid power system to motor operation mode, and / or setting the hybrid power system to engine operation mode. In some examples, the method is based on Figure 2 Method 30 is implemented and / or by Figure 4 The control system 40 is implemented.

[0052] In some implementations, the control command for setting the hybrid system to compressor mode includes setting the combustion engine to operate as a compressor to heat the aftertreatment system.

[0053] In some embodiments, configuring the combustion engine to operate as a compressor includes: configuring an electric motor to enable the combustion engine to operate as a compressor; controlling an intake valve to provide air at a first temperature into the combustion engine; configuring the combustion engine to compress air to heat the air to a second temperature equal to or higher than the first temperature; and controlling an exhaust valve to open and enable the heated air at the second temperature to travel from the engine to the aftertreatment system.

[0054] In some embodiments, the combustion engine is configured to operate as a compressor, including a control valve opening system and a fuel injection system, such that air enters the combustion engine and fuel is not injected into the combustion engine.

[0055] In some implementations, determining the system temperature zone in which the post-processing system is located includes using a temperature sensor to determine the system temperature corresponding to the post-processing system.

[0056] In some implementations, when the determined system temperature zone is in a first temperature zone and the determined power demand is in a first power demand zone, the control strategy further includes setting the electric heater to turn on to heat the post-processing system.

[0057] In some implementations, when the determined system temperature zone is in a first temperature zone and the determined power demand is in a first power demand zone, the control strategy further includes setting the electric heater to off and setting the hybrid power system to a motor operation mode to deliver power at least greater than or equal to the determined power demand.

[0058] In some implementations, determining the power requirements corresponding to the hybrid power system includes determining the power requirements corresponding to the hybrid power system based at least in part on the acceleration input.

[0059] In some implementations, when the determined system temperature zone is in a first temperature zone and the determined power demand is in a second power demand zone, the control strategy further includes: setting the hybrid power system to a power distribution mode to deliver power at least greater than or equal to the determined power demand, and setting the electric heater to turn on to heat the aftertreatment system.

[0060] In some implementations, when the determined system temperature zone is in the second temperature zone and the determined power demand is in the first power demand zone, the control strategy further includes: setting the hybrid power system to a power distribution mode or a motor operation mode to deliver power at least greater than or equal to the determined power demand, and / or setting the electric heater to be on.

[0061] In some implementations, when the determined system temperature zone is in the second temperature zone and the determined power demand is in the second power demand zone, the control strategy further includes: setting the hybrid system to a power distribution mode or engine operation mode to deliver power at least greater than or equal to the determined power demand, and / or setting the electric heater of the hybrid system to be turned on.

[0062] In some implementations, when the determined system temperature zone is in the third temperature zone, the control strategy further includes: setting the hybrid system to one of a power distribution mode and an engine operation or motor operation mode to optimize overall vehicle fuel efficiency to deliver power greater than or equal to the determined power demand; and / or setting the electric heater to off.

[0063] In some embodiments, the computer-implemented method further includes determining an energy level corresponding to an energy storage system connected to an electric motor, and wherein the step of determining a control strategy is also based on the determined energy level.

[0064] In some implementations, when the determined energy level is below an energy threshold, the control strategy includes setting the hybrid system to engine charging mode to recharge the energy storage system.

[0065] In some implementations, setting the hybrid system to engine charging mode includes setting the combustion engine to deliver a power output greater than the determined power demand for charging the energy storage system and / or powering the heater.

[0066] In some implementations, the control commands for setting the hybrid system to a power distribution mode include distributing power between the engine and the motor, for example, by setting the electric motor and the engine to operate at different power levels to deliver power at least equal to or greater than the determined power demand. In the power distribution mode, the combustion engine may be set to operate in a high-efficiency region and / or a low-emission region, for example, based on a temperature zone and / or power demand.

[0067] In some implementations, the control command for setting the hybrid system to motor operation mode includes setting the electric motor to deliver power at least greater than or equal to the determined power requirement.

[0068] In some implementations, the control command for setting the hybrid system to engine operating mode includes setting the combustion engine to deliver power at least greater than or equal to the determined power demand.

[0069] In various embodiments, a system for controlling a hybrid power system including an electric motor, a combustion engine, an aftertreatment system, and an electric heater coupled to the aftertreatment system includes: a temperature zone determination module configured to determine a system temperature zone of the aftertreatment system as being in: a first temperature zone below a first temperature threshold, a second temperature zone from the first temperature threshold to a second temperature threshold, or a third temperature zone above the second temperature threshold; a power demand determination module configured to determine a power demand corresponding to operation of the hybrid power system as: being in a first power demand zone if the power demand is below a power threshold, or being in a second power demand zone if the power demand is equal to or greater than a power threshold; and a control strategy determination module configured to determine a control strategy based at least in part on the determined system temperature zone and the determined power demand. In some examples, the control strategy includes a control command that sets the hybrid power system to compressor mode when: the determined system temperature zone is in the first temperature zone and the determined power demand is zero, or the determined system temperature zone is in the first temperature zone and the determined power demand is in the first power demand zone. In some examples, the control strategy also includes a control command selected from: setting the hybrid system to a power distribution mode, setting the hybrid system to a motor operation mode, and / or setting the hybrid system to an engine operation mode. In some examples, the system is configured to achieve... Figure 2 Method 30 and / or similar Figure 4 The control system 40.

[0070] In various embodiments, a non-transitory computer-readable medium storing instructions that, when executed by a processor, cause the processor to perform the following operations: determining a system temperature zone of the post-processing system as being in: a first temperature zone below a first temperature threshold, a second temperature zone from the first temperature threshold to a second temperature threshold, or a third temperature zone above the second temperature threshold; determining a power demand corresponding to the operation of the hybrid power system as: being in a first power demand zone if the power demand is below a power threshold, or being in a second power demand zone if the power demand is equal to or greater than a power threshold; and determining a control strategy based at least in part on the determined system temperature zone and the determined power demand. In some examples, the control strategy includes a control command to set the hybrid power system to compressor mode when: the determined system temperature zone is in the first temperature zone and the determined power demand is zero, or the determined system temperature zone is in the first temperature zone and the determined power demand is in the first power demand zone. In some examples, the control strategy also includes a control command selected from: setting the hybrid power system to power distribution mode, setting the hybrid power system to motor operation mode, and / or setting the hybrid power system to engine operation mode. In some examples, when executed by a processor, a non-transitory computer-readable medium causes the processor to perform... Figure 2 Method 30. In some examples, non-transitory computer-readable media may be provided by Figure 4 The control system 40 is executed.

[0071] It should be understood that, for example, some or all components of the various embodiments of this disclosure are implemented individually and / or in combination with at least one other component using one or more software components, one or more hardware components, and / or one or more combinations of software and hardware components. In another example, some or all components of the various embodiments of this disclosure are implemented individually and / or in combination with at least one other component in one or more circuits, such as one or more analog circuits and / or one or more digital circuits. In yet another example, although the above embodiments relate to specific features, the scope of this disclosure also includes embodiments with different combinations of features and embodiments that do not include all of the stated features. In yet another example, various embodiments and / or examples of this disclosure may be combined.

[0072] Furthermore, the methods and systems described herein can be implemented on many different types of processing devices using program code that includes program instructions executable by a device processing subsystem. Software program instructions may include source code, object code, machine code, or any other stored data operable to cause the processing system to perform the methods and operations described herein. However, other implementations may also be used, such as firmware or even hardware appropriately designed to perform the methods and systems described herein.

[0073] Data in systems and methods (e.g., associations, mappings, data inputs, data outputs, intermediate data results, final data results, etc.) can be stored and implemented in one or more different types of computer-implemented data storage units, such as different types of storage devices and programming structures (e.g., RAM, ROM, EEPROM, flash memory, flat files, databases, programming data structures, programming variables, IF-THEN (or similar) statement structures, application programming interfaces, etc.). Note that data structures describe the format used to organize and store data in databases, programs, memory, or other computer-readable media used by computer programs.

[0074] The systems and methods described herein may be provided on many different types of computer-readable media, including computer storage mechanisms (e.g., CD-ROM, disk, RAM, flash memory, computer hard disk, DVD, etc.) containing instructions (e.g., software) for execution by a processor to perform the operations of the methods and implement the systems described herein. The computer components, software modules, functions, data stores, and data structures described herein may be directly or indirectly connected to each other to allow the data flow necessary for their operation. It should also be noted that modules or processors include code units that perform software operations and may be implemented as, for example, subroutine units of code, or software functional units of code, or objects (as in an object-oriented paradigm), or applets, or computer scripting languages, or another type of computer code. Depending on the available resources, software components and / or functions may reside on a single computer or be distributed across multiple computers.

[0075] A computing system may include client devices and servers. Client devices and servers are typically geographically separated and usually interact through communication networks. The relationship between client devices and servers arises from computer programs running on various computers that have client-server relationships with each other.

[0076] This specification contains numerous details of specific embodiments. Certain features described in this specification within the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments. Furthermore, although features may be described above as functioning in certain combinations, in some cases, one or more features from a combination may be removed from the combination, and combinations may be, for example, for sub-combinations or variations of sub-combinations.

[0077] Similarly, although the operations are depicted in a specific order in the accompanying drawings, this should not be construed as requiring these operations to be performed in the specific order shown or sequentially, or to perform all the shown operations to achieve the desired result. In some cases, multitasking and parallel processing may be advantageous. Furthermore, the separation of the various system components in the above embodiments should not be construed as requiring such separation in all embodiments, and it should be understood that the described program components and systems can generally be integrated together in a single software product or packaged into multiple software products.

[0078] While specific embodiments of this disclosure have been described, those skilled in the art will understand that other equivalent embodiments exist. Therefore, it should be understood that this disclosure is not limited to the embodiments specifically shown.

Claims

1. A computer-implemented method for controlling a hybrid power system, the hybrid power system comprising an electric motor, a combustion engine, an aftertreatment system, and an electric heater connected to the aftertreatment system, the method comprising the following steps: The system temperature range of the post-processing system is defined as being in the following condition: In the first temperature zone, the first temperature zone is lower than the first temperature threshold, or In the second temperature zone, the second temperature zone is at or above the first temperature threshold. Determine whether the power demand corresponding to the operation of the hybrid power system is below a power threshold; as well as The control strategy is determined at least in part based on the identified system temperature range and the identified power requirements. The control strategy includes a control command to set the hybrid power system to activate a compressor mode, in which the combustion engine is configured to operate as a compressor to heat the aftertreatment system based on a determined combination of a defined system temperature range and a determined power demand. The compressor mode is activated in response to the following: (1) the determined system temperature zone is in the first temperature zone, and (2) the determined power demand is zero or below the power threshold.

2. The computer implementation method according to claim 1, wherein, Setting the combustion engine to operate as a compressor includes: The electric motor is configured to operate the combustion engine as a compressor. The intake valve is controlled to provide air at a first temperature into the combustion engine; The combustion engine is configured to compress the air to heat it to a second temperature equal to or higher than the first temperature; and The exhaust valve is opened, allowing heated air at the second temperature to travel from the engine to the aftertreatment system.

3. The computer implementation method according to claim 1, wherein, Setting the combustion engine to operate as a compressor includes: a control valve opening system and a fuel injection system, such that air enters the combustion engine and fuel is not injected into the combustion engine.

4. The computer implementation method according to claim 1, wherein, The step of determining the system temperature range in which the post-processing system is located includes: using a temperature sensor to determine the system temperature corresponding to the post-processing system.

5. The computer implementation method according to claim 1, wherein, In response to the determined system temperature range being within the first temperature range and the determined power demand being lower than the power threshold, the control strategy further includes: In addition to activating the compressor mode, the electric heater is also set to turn on to heat the post-processing system.

6. The computer implementation method according to claim 5, wherein, In response to the determined system temperature range being within the first temperature range and the determined power demand being lower than the power threshold, the control strategy further includes: In addition to activating the compressor mode and setting the electric heater to on, the hybrid power system is also set to motor operation mode to deliver power at least greater than or equal to the determined power requirement.

7. The computer implementation method according to claim 1, wherein, In response to the determined system temperature range being within the first temperature range and the determined power demand being lower than the power threshold, the control strategy further includes: Set the electric heater to off, and In addition to activating the compressor mode, the hybrid system is also set to motor operation mode to deliver power at least greater than or equal to the determined power requirement.

8. The computer implementation method according to claim 1, wherein, The step of determining the power requirement corresponding to the hybrid power system includes: determining the power requirement corresponding to the hybrid power system based at least in part on acceleration input.

9. The computer implementation method according to claim 1, wherein, In response to the determined system temperature range being within the first temperature range and the determined power demand being at or above the power threshold, the control strategy further includes: Disabling the compressor mode of the hybrid power system; The hybrid power system is configured in a power distribution mode to deliver power at least greater than or equal to the determined power requirement, and The electric heater is set to turn on to heat the post-processing system.

10. The computer implementation method according to claim 1, wherein, In response to the determined system temperature range being within the second temperature range and the determined power demand being below the power threshold, the control strategy further includes: Disabling the compressor mode of the hybrid power system; The hybrid power system is configured to a power distribution mode or a motor operation mode to deliver power at least greater than or equal to the determined power demand. Set the electric heater to turn on.

11. The computer implementation method according to claim 1, wherein, In response to the determined system temperature range being within the second temperature range and the determined power demand being at or above the power threshold, the control strategy further includes: Disabling the compressor mode of the hybrid power system; The hybrid system is configured to a power distribution mode or engine operation mode to deliver power at least greater than or equal to the determined power demand, and The electric heater of the hybrid power system is set to be turned on.

12. The computer implementation method according to claim 1, wherein, The second temperature zone lies between the first temperature threshold and a second temperature threshold higher than the first temperature threshold, and in response to the determined system temperature zone being in a third temperature zone higher than the second temperature threshold, the control strategy further includes: Disabling the compressor mode of the hybrid power system; The hybrid system is configured to either a power distribution mode or an engine operation or motor operation mode to optimize overall vehicle fuel efficiency, delivering power greater than or equal to the determined power demand; and Set the electric heater to off.

13. The computer implementation method of claim 1, further comprising determining an energy level corresponding to an energy storage system connected to the electric motor, wherein, The control strategy is also determined based on the determined energy level.

14. The computer implementation method according to claim 13, wherein, In response to a determined energy level falling below an energy threshold, the control strategy includes: The hybrid system is set to engine charging mode to recharge the energy storage system.

15. The computer implementation method according to claim 14, wherein, Setting the hybrid system to engine charging mode includes setting the combustion engine to deliver power greater than the determined power demand by at least the charging power demand for charging the energy storage system connected to the electric motor.

16. The computer implementation method according to claim 1, wherein, The control strategy also includes a control command that sets the hybrid system to a power distribution mode, which sets the electric motor and the engine to operate at different power levels to deliver power at least equal to or greater than the determined power requirement.

17. The computer implementation method according to claim 1, wherein, The control strategy also includes a control command that sets the hybrid power system to a motor operation mode, wherein the control command sets the electric motor to deliver power at least greater than or equal to the determined power requirement.

18. The computer implementation method according to claim 1, wherein, The control strategy also includes a control command that sets the hybrid power system to an engine operating mode, wherein the control command sets the combustion engine to deliver power at least greater than or equal to the determined power requirement.

19. A system for controlling a hybrid power system, the hybrid power system comprising an electric motor, a combustion engine, an aftertreatment system, and an electric heater coupled to the aftertreatment system, the system comprising: A temperature zone determination module, configured to determine the system temperature zone of the post-processing system as being in the following condition: In the first temperature zone, the first temperature zone is lower than the first temperature threshold, or In the second temperature zone, the second temperature zone is at or above the first temperature threshold. A power demand determination module, configured to determine whether the power demand corresponding to the operation of the hybrid power system is lower than a power threshold; as well as A control strategy determination module is configured to determine a control strategy based at least in part on a determined system temperature range and a determined power requirement. The control strategy includes a control command to set the hybrid power system to activate a compressor mode, in which the combustion engine is configured to operate as a compressor to heat the aftertreatment system based on a determined combination of a defined system temperature range and a determined power demand. The compressor mode is activated in response to the following: (1) the determined system temperature zone is in the first temperature zone, and (2) the determined power demand is zero or below the power threshold.

20. A non-transitory computer-readable medium storing instructions that, when executed by a processor, cause the processor to perform the following operations: The system temperature range of the post-processing system is defined as: In the first temperature zone, the first temperature zone is lower than the first temperature threshold, or In the second temperature zone, the second temperature zone is at or above the first temperature threshold. Determine whether the power demand corresponding to the operation of the hybrid power system is below the power threshold; as well as The control strategy is determined at least in part based on the identified system temperature range and the identified power requirements. The control strategy includes a control command to set the hybrid power system to activate a compressor mode, in which the combustion engine is set to operate as a compressor to heat the aftertreatment system based on a determined combination of a defined system temperature range and a determined power demand. The compressor mode is activated in response to the following: (1) the determined system temperature zone is in the first temperature zone, and (2) the determined power demand is zero or below the power threshold.

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