Range extender power following control method, device, equipment, product and medium

Abstract

The present invention discloses a range extender power following control method, device, equipment, product and medium. The range extender power following control method comprises: obtaining the required power and the actual response power; determining the current stage of the required power based on the required power; when the current stage of the required power is the rising stage, determining the power difference between the required power and the actual response power, and correcting the smoke limit setting value and / or the throttle valve required opening based on the power difference. By adopting the above scheme, the problem of poor power following of the range extender is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a range extender power following control method, device, equipment, product and medium. Background Art

[0002] With the vigorous development of new energy vehicles, the development of extended-range electric vehicles is changing with each passing day. Extended-range electric vehicles usually use a range extender hybrid system, such as Figure 1 As shown, the range extender hybrid system generally includes a battery 1, a range extender 2, an electric drive system 3 and an axle 4. The electric drive system 3 includes a drive motor controller 31, a drive motor 32 and a gearbox 33. The range extender 2 generally includes an engine 21, a generator 22 and a generator controller 23, etc.

[0003] At present, the control of the range extender 2 includes fixed-point control, power following control, fixed-point plus power following composite control, etc., that is, the control of the range extender 2 has been perfected. Among them, power following means that the power generation power of the range extender 2 directly follows the power demand of the whole vehicle to reduce the power consumption of the power battery 1 and ensure the vehicle's endurance.

[0004] The current extended-range hybrid system mostly adopts a power-following control method to avoid the efficiency loss of excess power entering and leaving the battery 1. In the prior art, the control of the range extender 2 under the power-following condition generally focuses on the dynamic performance, that is, the actual power generation follows the vehicle's required power in real time. However, due to the influence of the torque responsiveness of the engine 21, there is sometimes still a large deviation between the required torque and the actual torque during torque control, which leads to large fluctuations in the speed of the generator 22 and fluctuations in the generated power. Summary of the invention

[0005] The present invention provides a range extender power following control method, device, equipment, product and medium to solve the problem of poor power following performance of the range extender.

[0006] According to one aspect of the present invention, a range extender power following control method is provided, the range extender power following control method comprising:

[0007] Obtain required power and actual response power;

[0008] Determining a current stage of required power based on the required power;

[0009] When the current stage of the required power is a rising stage, a power difference between the required power and the actual response power is determined, and the smoke limit setting value and / or the required throttle valve opening are corrected based on the power difference.

[0010] In an optional embodiment of the present invention, the step of correcting the smoke limit setting value and / or the throttle valve required opening based on the power difference includes:

[0011] When the power difference is greater than a first preset power difference threshold, correcting the smoke limit setting value based on the power difference;

[0012] When the power difference is greater than a second preset power difference threshold, the required throttle valve opening is corrected based on the power difference, wherein the second preset power difference threshold is greater than the first preset power difference threshold.

[0013] In an optional embodiment of the present invention, when the power difference is greater than the first preset power difference threshold, before correcting the smoke limit setting value based on the power difference, the method further includes:

[0014] Get engine speed, actual air intake and circulating oil volume;

[0015] Correspondingly, the correcting the smoke limit setting value based on the power difference includes:

[0016] Correcting the smoke limit setting value based on the engine speed, the actual intake air volume and the power difference;

[0017] Accordingly, after the smoke density limit setting value is corrected based on the engine speed, the actual intake air volume and the power difference, the method further includes:

[0018] Determining a smoke limit flow rate based on the smoke limit setting value;

[0019] Correspondingly, the correcting the required throttle valve opening based on the power difference includes:

[0020] The required throttle valve opening is corrected based on the engine speed, the circulating oil amount, and the power difference.

[0021] In an optional embodiment of the present invention, the correcting the smoke limit setting value based on the engine speed, the actual intake air volume and the power difference value includes:

[0022] determining a smoke limit base value based on the engine speed and the actual intake air volume;

[0023] determining a smoke limit correction coefficient based on the engine speed and the power difference;

[0024] Correcting the smoke limit basic value based on the smoke limit correction coefficient to obtain a smoke limit setting value;

[0025] Accordingly, after the smoke density limit setting value is corrected based on the engine speed, the actual intake air volume and the power difference, the method further includes:

[0026] A smoke limit flow rate is determined based on the smoke limit set value.

[0027] In an optional embodiment of the present invention, the correcting the required throttle valve opening based on the engine speed, the circulating oil volume and the power difference includes:

[0028] determining a throttle valve setting opening based on the engine speed and the circulating oil amount;

[0029] determining a throttle valve opening correction coefficient based on the power difference;

[0030] A required throttle valve opening is determined based on the throttle valve opening correction coefficient and the set throttle valve opening.

[0031] In an optional embodiment of the present invention, the determining the required throttle valve opening based on the throttle valve opening correction coefficient and the throttle valve setting opening includes:

[0032] When the product of the throttle valve opening correction coefficient and the throttle valve setting opening is greater than the minimum throttle valve opening and less than the maximum throttle valve opening, the product of the throttle valve opening correction coefficient and the throttle valve setting opening is determined as the throttle valve required opening;

[0033] When the product of the throttle valve opening correction coefficient and the throttle valve setting opening is less than or equal to the minimum throttle valve opening, the minimum throttle valve opening is determined as the throttle valve required opening;

[0034] When the product of the throttle valve opening correction coefficient and the throttle valve setting opening is greater than or equal to the maximum throttle valve opening, the maximum throttle valve opening is determined as the throttle valve required opening.

[0035] In an optional embodiment of the present invention, determining the current stage of required power based on the required power includes:

[0036] Get the throttle opening change rate;

[0037] When the throttle opening change rate is greater than 0 and the required power of the current step length minus the required power of the previous step length is greater than a preset power difference threshold, it is determined that the current stage of the required power is a rising stage;

[0038] When the throttle opening change rate is less than or equal to 0, or the required power of the current step length minus the required power of the previous step length is less than or equal to the preset power difference threshold, it is determined that the current stage of the required power is not a rising stage.

[0039] According to another aspect of the present invention, a range extender power following control device is provided, the range extender power following control device comprising:

[0040] A power acquisition module, used to obtain required power and actual response power;

[0041] A stage determination module, configured to determine a current stage of required power based on the required power;

[0042] The correction module is used to determine the power difference between the required power and the actual response power when the current stage of the required power is an increasing stage, and to correct the smoke limit setting value and / or the throttle valve required opening based on the power difference.

[0043] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0044] at least one processor; and,

[0045] a memory communicatively connected to the at least one processor; wherein,

[0046] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the range extender power following control method described in any embodiment of the present invention.

[0047] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the range extender power following control method described in any embodiment of the present invention when executed.

[0048] According to another aspect of the present invention, a computer program product is provided. The computer program product includes a computer program. When the computer program is executed by a processor, the range extender power following control method according to any embodiment of the present invention is implemented.

[0049] The technical solution of the embodiment of the present invention obtains the required power and the actual response power, determines the current stage of the required power based on the required power, determines the power difference between the required power and the actual response power when the current stage of the required power is an ascending stage, and corrects the smoke limit setting value and / or the throttle valve required opening based on the power difference. It can improve the transient responsiveness of the engine, enhance the power followability of the range extender, effectively reduce the efficiency loss caused by the excess power entering and leaving the battery, reduce the fuel consumption of the whole vehicle, improve the economic efficiency of the whole vehicle operation, and solve the problem of poor power followability of the range extender.

[0050] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0052] Figure 1 A schematic diagram of the structure of a range-extended hybrid power system provided for related technologies;

[0053] Figure 2 A flow chart of a range extender power following control method provided in Embodiment 1 of the present invention;

[0054] Figure 3 yes Figure 2 The step in the flowchart determines the current stage of the required power based on the required power;

[0055] Figure 4 A flow chart of a range extender power following control method provided in Embodiment 2 of the present invention;

[0056] Figure 5 A flow chart of a range extender power following control method provided in Embodiment 3 of the present invention;

[0057] Figure 6 for Figure 5 A flowchart of the step of correcting the smoke limit setting value based on the engine speed, the actual intake air volume and the power difference;

[0058] Figure 7 for Figure 5 A flowchart of the step of correcting the required throttle valve opening based on the engine speed, the circulating oil volume and the power difference;

[0059] Figure 8 A schematic diagram of the structure of a range extender power following control device provided in Embodiment 4 of the present invention;

[0060] Fig. 9 It is a structural schematic diagram of an electronic device for implementing the range extender power following control method according to an embodiment of the present invention.

[0061] Among them: 1. Battery; 2. Range extender; 21. Engine; 22. Generator; 23. Generator controller; 3. Electric drive system; 31. Drive motor controller; 32. Drive motor; 33. Gearbox; 4. Axle. DETAILED DESCRIPTION

[0062] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0063] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0064] Embodiment 1

[0065] Figure 2 This is a flow chart of a range extender power following control method provided in Embodiment 1 of the present invention. This embodiment can be applied to a range extender hybrid power system for power following control. The range extender power following control method can be executed by a range extender power following control device. The range extender power following control device can be implemented in the form of hardware and / or software. The range extender power following control device can be configured in a generator controller. Figure 2 As shown, the range extender power following control method includes:

[0066] S110: Obtain required power and actual response power.

[0067] Among them, the demand power refers to the power that the range extender needs to achieve, and the actual response power refers to the power actually output by the range extender.

[0068] S120: Determine a current stage of required power based on the required power.

[0069] The current stage of the power demand includes an increasing stage, which means that the power demand is increasing. In some embodiments, the current stage of the power demand also includes a decreasing stage and a constant stage, which means that the power demand is decreasing, and the constant stage means that the power demand remains unchanged.

[0070] S130: When the current stage of the required power is a rising stage, determine the power difference between the required power and the actual response power, and correct the smoke limit setting value and / or the throttle valve required opening based on the power difference.

[0071] Among them, the value of the required power minus the actual response power is the power difference, and the power difference reflects the power followability of the range extender. The smoke limit setting value refers to the maximum value that the smoke generated by the vehicle during operation is set not to exceed. Different smoke limit setting values ​​have different degrees of restriction on the actual fuel injection amount. By correcting the smoke limit setting value based on the power difference, the degree of restriction on the actual fuel injection amount can be adjusted, and the actual fuel injection rate can be adjusted to improve the power responsiveness of the engine. The required throttle valve opening refers to the opening that the throttle valve should be opened. Different throttle valve required openings have different intake volumes, and thus different engine power. By correcting the throttle valve required opening based on the power difference, the intake volume can be adjusted to adjust the engine power, thereby improving the power followability of the range extender.

[0072] The above scheme obtains the required power and the actual response power, determines the current stage of the required power based on the required power, and when the current stage of the required power is the rising stage, determines the power difference between the required power and the actual response power, and corrects the smoke limit setting value and / or the throttle valve required opening based on the power difference. It can improve the transient responsiveness of the engine, enhance the power followability of the range extender, effectively reduce the efficiency loss caused by the excess power entering and leaving the battery, reduce the fuel consumption of the whole vehicle, improve the economic efficiency of the whole vehicle operation, and solve the problem of poor power followability of the range extender.

[0073] In an optional embodiment of the present invention, Figure 3 As shown, the determining the current stage of the required power based on the required power includes:

[0074] S121. Obtain the throttle opening change rate.

[0075] Among them, the driver changes the output power of the engine by operating the accelerator pedal. The throttle opening change refers to the change in the position of the accelerator pedal. The throttle opening change rate refers to the speed of change of the accelerator pedal opening, that is, the speed of the change of the accelerator pedal position.

[0076] S122: When the throttle opening change rate is greater than 0 and the required power of the current step length minus the required power of the previous step length is greater than a preset power difference threshold, it is determined that the current stage of the required power is a rising stage.

[0077] Among them, the power step refers to the increment of each power adjustment in a specific technology or system. The demand power of the current step refers to the increment of the demand power of the current adjustment, the demand power of the previous step refers to the increment of the demand power of the previous adjustment, and the preset power difference threshold refers to the value that the difference between the two adjustments of the demand power will be greater than when the current stage of the demand power is the rising stage. When the throttle opening change rate is greater than 0, it means that the demand power is in the process of adjustment. Therefore, when the throttle opening change rate is greater than 0 and the demand power of the current step minus the demand power of the previous step is greater than the preset power difference threshold, it is determined that the current stage of the demand power is the rising stage.

[0078] S123: When the throttle opening change rate is less than or equal to 0, or the required power of the current step minus the required power of the previous step is less than or equal to the preset power difference threshold, it is determined that the current stage of the required power is not a rising stage.

[0079] Among them, when the throttle opening change rate is less than or equal to 0, it means that the power demand is not in the adjustment process at this time, so the current stage of the power demand is not the rising stage. When the power demand of the current step length minus the power demand of the previous step length is less than or equal to the preset power difference threshold, it means that the power demand is not rising, so it is determined that the power demand is not the rising stage at the current stage.

[0080] Through the above solution, it is possible to conveniently determine whether the current stage of the required power is a rising stage according to the required power.

[0081] Embodiment 2

[0082] Figure 4 A flow chart of a range extender power following control method provided in the second embodiment of the present invention. The relationship between this embodiment and the above embodiment is that the first embodiment is improved. Optionally, the smoke density limit setting value and / or the throttle valve required opening are corrected based on the power difference, including: when the power difference is greater than a first preset power difference threshold, the smoke density limit setting value is corrected based on the power difference; when the power difference is greater than a second preset power difference threshold, the throttle valve required opening is corrected based on the power difference, wherein the second preset power difference threshold is greater than the first preset power difference threshold. Figure 4 As shown, the range extender power following control method includes:

[0083] S210: Obtain required power and actual response power.

[0084] S220: Determine a current stage of required power based on the required power.

[0085] S230: When the current stage of the required power is a rising stage, determine the power difference between the required power and the actual response power.

[0086] S240: When the power difference is greater than a first preset power difference threshold, correct the smoke limit setting value based on the power difference.

[0087] S250: When the power difference is greater than a second preset power difference threshold, correct the required throttle valve opening based on the power difference, wherein the second preset power difference threshold is greater than the first preset power difference threshold.

[0088] Among them, both measures of correcting the smoke limit setting value and the throttle valve demand opening can improve the power followability of the range extender. By setting two different thresholds, a first preset power difference threshold and a second preset power difference threshold, the smoke limit setting value correction is triggered when the power difference is greater than the first preset power difference threshold, and the throttle valve demand opening correction is triggered when the power difference is greater than the second preset power difference threshold. Different measures can be selected according to the actual situation of the power difference between the demand power and the actual response power to improve the power followability of the range extender, thereby effectively reducing the efficiency loss caused by excess power entering and exiting the battery, and improving the economy of vehicle operation.

[0089] Embodiment 3

[0090] Figure 5 A flow chart of a range extender power following control method provided in the third embodiment of the present invention. The relationship between this embodiment and the above embodiments is that the second embodiment is improved. Optionally, when the power difference is greater than the first preset power difference threshold, before correcting the smoke density limit setting value based on the power difference, it also includes: acquiring the engine speed, the actual air intake volume and the circulating oil volume; accordingly, correcting the smoke density limit setting value based on the power difference includes: correcting the smoke density limit setting value based on the engine speed, the actual air intake volume and the power difference; accordingly, correcting the throttle valve required opening based on the power difference includes: correcting the throttle valve required opening based on the engine speed, the circulating oil volume and the power difference. Correspondingly, after correcting the smoke density limit setting value based on the engine speed, the actual air intake volume and the power difference, it also includes: determining the smoke density limit flow rate based on the smoke density limit setting value. Figure 5 As shown, the range extender power following control method includes:

[0091] S310: Obtain required power and actual response power.

[0092] S320: Obtain engine speed, actual air intake volume, and circulating oil volume.

[0093] Among them, the engine speed is the rotation speed of the engine crankshaft per minute, which is an important indicator to measure the engine's operating status. The actual intake volume refers to the flow of fresh air from the outside into the car engine, which is one of the key factors to ensure the normal operation of the engine. The circulating oil volume refers to the fuel consumption of the car when it is driving at a constant speed, accelerating and decelerating in a designated typical road section.

[0094] S330: Determine the current stage of required power based on the required power.

[0095] S340: When the current stage of the required power is a rising stage, determine the power difference between the required power and the actual response power.

[0096] S350: When the power difference is greater than a first preset power difference threshold, the smoke limit setting value is corrected based on the engine speed, the actual intake air volume and the power difference.

[0097] Among them, the smoke limit is closely related to the emission control of the engine, so the smoke limit setting value can be corrected according to the engine speed, actual intake volume and power difference, so that the corrected smoke limit setting value is more in line with the actual working conditions, thereby more effectively improving the power responsiveness of the engine.

[0098] S360: Determine the smoke limit flow rate based on the smoke limit setting value.

[0099] Among them, the smoke limit fuel quantity is a control method achieved by adjusting the fuel injection quantity in order to control the exhaust smoke density not to exceed the specified limit. By calculating the smoke limit fuel quantity based on the smoke limit setting value, the actual fuel injection quantity can be limited. By enabling the smoke limit correction to reduce the degree of restriction of the smoke limit fuel quantity on the actual fuel injection quantity, the actual fuel injection rate can be increased to improve the power responsiveness of the engine. Specifically, the smoke limit fuel quantity = (actual intake volume / smoke limit setting value) / 14.3, so the smoke limit fuel quantity can be accurately calculated.

[0100] S370. When the power difference is greater than a second preset power difference threshold, the required throttle valve opening is corrected based on the engine speed, the circulating oil volume and the power difference, wherein the second preset power difference threshold is greater than the first preset power difference threshold.

[0101] Among them, the vehicle's throttle valve refers to a valve installed on the car, and its main function is to control the engine's air intake. Specifically, the throttle valve controls the engine's air intake by adjusting the flow rate of the fluid in the pipeline. When the driver steps on the accelerator, the intake volume is actually adjusted by controlling the opening of the throttle valve, thereby controlling the fuel mixture ratio and engine speed, and directly affecting the system's circulating oil volume. Therefore, there is a certain correlation between the circulating oil volume and the engine speed and the required throttle valve opening. Correcting the required throttle valve opening according to the engine speed, the circulating oil volume and the power difference can make the corrected throttle valve opening more in line with the actual vehicle operating conditions, thereby more effectively improving the engine power, and then improving the power followability of the range extender.

[0102] In an optional embodiment of the present invention, Figure 6 As shown, the smoke limit setting value is corrected based on the engine speed, the actual intake air volume and the power difference, including:

[0103] S351. Determine a smoke limit base value based on the engine speed and the actual intake air volume.

[0104] Among them, the correlation between the engine speed and the actual air intake volume and the smoke density limit base value can be obtained by pre-testing, and the smoke density limit base value can be obtained later according to the engine speed and the actual air intake volume through the correlation. For example, a relationship diagram between the engine speed and the actual air intake volume and the smoke density limit base value can also be established. After obtaining the engine speed and the actual air intake volume, the smoke density limit base value can be obtained by searching the relationship diagram between the engine speed and the actual air intake volume and the smoke density limit base value.

[0105] S352. Determine a smoke limit correction coefficient based on the engine speed and the power difference.

[0106] Among them, the smoke limit correction coefficient refers to the coefficient used to correct the smoke limit base value. Since the smoke limit is closely related to the emission control of the engine, and the power difference reflects the degree of power following, the smoke limit correction coefficient can be obtained through the engine speed and the power difference, so that the corrected smoke limit setting value can improve the power following performance. In some embodiments, the correlation between the engine speed and the power difference and the smoke limit correction coefficient can also be obtained by pre-testing, and the smoke limit correction coefficient can be obtained later according to the engine speed and the power difference through the correlation. For example, a relationship diagram between the engine speed and the power difference and the smoke limit correction coefficient can be established. After obtaining the engine speed and the power difference, the smoke limit correction coefficient can be obtained by looking up the relationship diagram between the engine speed and the power difference and the smoke limit correction coefficient.

[0107] S353: Correct the smoke limit basic value based on the smoke limit correction coefficient to obtain a smoke limit setting value.

[0108] The smoke limit setting value can be obtained by multiplying the smoke limit correction coefficient by the smoke limit basic value.

[0109] The above scheme can obtain the smoke limit base value, and then obtain the smoke limit setting value after the smoke limit base value is corrected by the smoke limit correction coefficient. The smoke limit fuel quantity is calculated based on the smoke limit setting value in the later stage, thereby limiting the actual fuel injection quantity. By enabling the smoke limit correction to reduce the degree of restriction of the smoke limit fuel quantity on the actual fuel injection quantity, the actual fuel injection rate can be increased, thereby improving the power responsiveness of the engine, improving the torque power following characteristics, avoiding the efficiency loss caused by excess power entering and leaving the battery, and improving the economic efficiency of the vehicle operation.

[0110] In an optional embodiment of the present invention, Figure 7 As shown, the correction of the throttle valve required opening based on the engine speed, the circulating oil volume and the power difference includes:

[0111] S371. Determine the throttle valve setting opening based on the engine speed and the circulating oil amount.

[0112] Among them, the correlation between the engine speed, the circulating oil volume and the throttle valve setting opening can be obtained by pre-testing, and the throttle valve setting opening can be obtained later according to the engine speed and the circulating oil volume through the correlation. For example, a relationship diagram between the engine speed, the circulating oil volume and the throttle valve setting opening can also be established. After obtaining the engine speed and the circulating oil volume, the throttle valve setting opening can be obtained by searching the relationship diagram between the engine speed, the circulating oil volume and the throttle valve setting opening.

[0113] S372. Determine a throttle valve opening correction coefficient based on the power difference.

[0114] Among them, the throttle valve opening correction coefficient refers to the coefficient used to correct the set throttle valve opening. The power difference reflects the degree of power following. Therefore, the throttle valve opening correction coefficient should be different for different power differences. In some embodiments, the correlation between the power difference and the throttle valve opening correction coefficient can be established in advance through testing, and the throttle valve opening correction coefficient corresponding to the current power difference can be obtained later according to the correlation. For example, a relationship diagram between the power difference and the throttle valve opening correction coefficient can also be established. After obtaining the power difference, the throttle valve opening correction coefficient can be obtained by looking up the relationship diagram between the power difference and the throttle valve opening correction coefficient.

[0115] S373. Determine the required throttle valve opening based on the throttle valve opening correction coefficient and the throttle valve set opening.

[0116] Among them, since the throttle valve opening correction coefficient refers to the coefficient used to correct the throttle valve set opening, the throttle valve set opening is the opening of the throttle valve when it is not corrected, and the throttle valve required opening refers to the opening that the throttle valve should be opened, the throttle valve required opening can be determined by the throttle valve opening correction coefficient and the throttle valve set opening.

[0117] On the basis of the above embodiment, determining the required throttle valve opening based on the throttle valve opening correction coefficient and the throttle valve setting opening includes:

[0118] When the product of the throttle valve opening correction coefficient and the throttle valve setting opening is greater than the minimum throttle valve opening and less than the maximum throttle valve opening, the product of the throttle valve opening correction coefficient and the throttle valve setting opening is determined as the throttle valve required opening.

[0119] When the product of the throttle valve opening correction coefficient and the throttle valve setting opening is less than or equal to the minimum throttle valve opening, the minimum throttle valve opening is determined as the throttle valve required opening.

[0120] When the product of the throttle valve opening correction coefficient and the throttle valve setting opening is greater than or equal to the maximum throttle valve opening, the maximum throttle valve opening is determined as the throttle valve required opening.

[0121] Among them, the minimum throttle valve opening refers to the threshold value that the throttle valve opening should be greater than when in normal use, and the maximum throttle valve opening refers to the threshold value that the throttle valve opening should be less than when in normal use. The throttle valve setting opening is multiplied by the throttle valve opening correction coefficient and then limited by the minimum throttle valve opening and the maximum throttle valve opening to obtain the throttle demand opening. The throttle valve demand opening is increased by correcting the throttle valve opening, thereby increasing the intake volume to further improve the engine power. The improvement of engine power can improve the power followability of the range extender, effectively reduce the efficiency loss caused by excess power entering and leaving the battery, and improve the economic efficiency of the vehicle operation.

[0122] Embodiment 4

[0123] Figure 8 This is a schematic diagram of the structure of a range extender power following control device provided by Embodiment 4 of the present invention. Figure 8 As shown, the range extender power following control device includes:

[0124] The power acquisition module 61 is used to acquire the required power and the actual response power.

[0125] The stage determination module 62 is used to determine the current stage of the required power based on the required power.

[0126] The correction module 63 is used to determine the power difference between the required power and the actual response power when the current stage of the required power is an increasing stage, and to correct the smoke limit setting value and / or the throttle valve required opening based on the power difference.

[0127] Optionally, the correction module 63 includes:

[0128] The smoke limit correction submodule is used to correct the smoke limit setting value based on the power difference when the power difference is greater than a first preset power difference threshold.

[0129] The throttle valve opening correction submodule is used to correct the throttle valve required opening based on the power difference when the power difference is greater than a second preset power difference threshold, wherein the second preset power difference threshold is greater than the first preset power difference threshold.

[0130] In an optional embodiment of the present invention, the range extender power following control device further includes:

[0131] The vehicle parameter acquisition module is used to obtain the engine speed, actual air intake volume and circulating oil volume.

[0132] Correspondingly, the smoke limit correction submodule is specifically used to correct the smoke limit set value based on the engine speed, the actual intake air volume and the power difference.

[0133] Correspondingly, the range extender power following control device further includes: a smoke limit flow rate determination module, which is used to determine the smoke limit flow rate based on the smoke limit setting value.

[0134] Correspondingly, the throttle valve opening correction submodule is specifically used to correct the throttle valve required opening based on the engine speed, the circulating oil volume and the power difference.

[0135] In an optional embodiment of the present invention, the smoke limit correction submodule includes:

[0136] The smoke density basic value determining unit is used to determine the smoke density limit basic value based on the engine speed and the actual intake air volume.

[0137] The smoke correction coefficient determination unit is used to determine the smoke limit correction coefficient based on the engine speed and the power difference.

[0138] The smoke limit value determining unit is used to correct the smoke limit value basic value based on the smoke limit value correction coefficient to obtain a smoke limit value setting value.

[0139] In an optional embodiment of the present invention, the throttle valve opening correction submodule includes:

[0140] The set opening determination unit is used to determine the set opening of the throttle valve based on the engine speed and the circulating oil amount.

[0141] The opening correction coefficient determining unit is used to determine the throttle valve opening correction coefficient based on the power difference.

[0142] The required opening determination unit is used to determine the required throttle valve opening based on the throttle valve opening correction coefficient and the throttle valve set opening.

[0143] In an optional embodiment of the present invention, the demand opening degree determining unit includes:

[0144] The first required opening determination subunit is used to determine the product of the throttle valve opening correction coefficient and the throttle valve setting opening as the throttle valve required opening when the product of the throttle valve opening correction coefficient and the throttle valve setting opening is greater than the minimum throttle valve opening and less than the maximum throttle valve opening.

[0145] The second required opening determination subunit is used to determine the minimum throttle valve opening as the required throttle valve opening when the product of the throttle valve opening correction coefficient and the throttle valve setting opening is less than or equal to the minimum throttle valve opening.

[0146] The third required opening determination subunit is used to determine the maximum throttle valve opening as the required throttle valve opening when the product of the throttle valve opening correction coefficient and the throttle valve setting opening is greater than or equal to the maximum throttle valve opening.

[0147] In an optional embodiment of the present invention, the stage determination module 62 includes:

[0148] The throttle opening change rate acquisition submodule is used to obtain the throttle opening change rate.

[0149] The first stage determination submodule is used to determine that the current stage of the required power is a rising stage when the throttle opening change rate is greater than 0 and the required power of the current step length minus the required power of the previous step length is greater than a preset power difference threshold.

[0150] The second stage determination submodule is used to determine that the current stage of the required power is not a rising stage when the throttle opening change rate is less than or equal to 0, or the required power of the current step minus the required power of the previous step is less than or equal to the preset power difference threshold.

[0151] The range extender power following control device provided in the embodiment of the present invention can execute the range extender power following control method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0152] Embodiment 5

[0153] Fig. 9 A schematic diagram of an electronic device that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0154] like Fig. 9 As shown, the electronic device includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In RAM13, various programs and data required for the operation of the electronic device can also be stored. The processor 11, ROM12 and RAM13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0155] A number of components in the electronic device are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0156] The processor 11 may be a variety of general and / or dedicated processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the range extender power following control method.

[0157] In some embodiments, the range extender power following control method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the range extender power following control method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to execute the range extender power following control method in any other appropriate manner (e.g., by means of firmware).

[0158] In some embodiments, the electronic device includes a computer program product, which includes a computer program. When the computer program is executed by the processor 11, it implements the various methods and processes described above, such as the range extender power following control method.

[0159] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0160] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0161] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, device, or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0162] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0163] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0164] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0165] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0166] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A range extender power following control method, characterized in that: include: Obtain required power and actual response power; Determining a current stage of required power based on the required power; When the current stage of the required power is an increasing stage, determining a power difference between the required power and the actual response power, and correcting a smoke limit setting value and a throttle valve required opening based on the power difference; Get engine speed, actual air intake and circulating oil volume; The method of correcting the smoke limit setting value and the throttle valve required opening based on the power difference includes: When the power difference is greater than a first preset power difference threshold, the smoke density limit setting value is corrected based on the power difference; the correcting the smoke density limit setting value based on the power difference includes: correcting the smoke density limit setting value based on the engine speed, the actual intake air volume and the power difference; Determining a smoke limit flow rate based on the smoke limit setting value; When the power difference is greater than a second preset power difference threshold, correcting the required throttle valve opening based on the power difference, wherein the second preset power difference threshold is greater than the first preset power difference threshold; The correcting the required throttle valve opening based on the power difference includes: correcting the required throttle valve opening based on the engine speed, the circulating oil amount and the power difference.

2. The range extender power following control method according to claim 1, characterized in that: The correcting the smoke limit setting value based on the engine speed, the actual intake air volume and the power difference value includes: determining a smoke limit base value based on the engine speed and the actual intake air volume; determining a smoke limit correction coefficient based on the engine speed and the power difference; The smoke limit basic value is corrected based on the smoke limit correction coefficient to obtain a smoke limit setting value.

3. The range extender power following control method according to claim 1, characterized in that: The method of correcting the required throttle valve opening based on the engine speed, the circulating oil volume and the power difference includes: determining a throttle valve setting opening based on the engine speed and the circulating oil amount; determining a throttle valve opening correction coefficient based on the power difference; A required throttle valve opening is determined based on the throttle valve opening correction coefficient and the set throttle valve opening.

4. The range extender power following control method according to claim 3, characterized in that: The determining the required throttle valve opening based on the throttle valve opening correction coefficient and the throttle valve setting opening includes: When the product of the throttle valve opening correction coefficient and the throttle valve setting opening is greater than the minimum throttle valve opening and less than the maximum throttle valve opening, the product of the throttle valve opening correction coefficient and the throttle valve setting opening is determined as the throttle valve required opening; When the product of the throttle valve opening correction coefficient and the throttle valve setting opening is less than or equal to the minimum throttle valve opening, the minimum throttle valve opening is determined as the throttle valve required opening; When the product of the throttle valve opening correction coefficient and the throttle valve setting opening is greater than or equal to the maximum throttle valve opening, the maximum throttle valve opening is determined as the throttle valve required opening.

5. The range extender power following control method according to any one of claims 1 to 4, characterized in that: The determining the current stage of required power based on the required power includes: Get the throttle opening change rate; When the throttle opening change rate is greater than 0 and the required power of the current step length minus the required power of the previous step length is greater than a preset power difference threshold, it is determined that the current stage of the required power is a rising stage; When the throttle opening change rate is less than or equal to 0, or the required power of the current step length minus the required power of the previous step length is less than or equal to the preset power difference threshold, it is determined that the current stage of the required power is not a rising stage.

6. A range extender power following control device, characterized in that: include: A power acquisition module, used to obtain required power and actual response power; A stage determination module, configured to determine a current stage of required power based on the required power; a correction module, configured to determine a power difference between the required power and the actual response power when the current stage of the required power is an increasing stage, and to correct a smoke limit setting value and a throttle valve required opening based on the power difference; Vehicle parameter acquisition module, used to obtain engine speed, actual air intake and circulating oil volume; The correction modules include: a smoke limit correction submodule, configured to correct the smoke limit setting value based on the power difference when the power difference is greater than a first preset power difference threshold; the smoke limit correction submodule is specifically configured to correct the smoke limit setting value based on the engine speed, the actual intake air volume and the power difference; a throttle valve opening correction submodule, configured to correct the throttle valve required opening based on the power difference when the power difference is greater than a second preset power difference threshold, wherein the second preset power difference threshold is greater than the first preset power difference threshold; the throttle valve opening correction submodule is specifically configured to correct the throttle valve required opening based on the engine speed, the circulating oil volume and the power difference; The smoke limit flow rate determination module is used to determine the smoke limit flow rate based on the smoke limit setting value.

7. An electronic device, characterized in that: The electronic device comprises: at least one processor; and, a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the range extender power following control method according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the range extender power following control method according to any one of claims 1 to 5 when executed.

9. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the computer program implements the range extender power following control method according to any one of claims 1 to 5.

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