CN108515849B - Generator torque control method based on range extender, range extender and electric automobile - Google Patents
Generator torque control method based on range extender, range extender and electric automobile Download PDFInfo
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- CN108515849B CN108515849B CN201810290038.5A CN201810290038A CN108515849B CN 108515849 B CN108515849 B CN 108515849B CN 201810290038 A CN201810290038 A CN 201810290038A CN 108515849 B CN108515849 B CN 108515849B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
Abstract
The invention provides a generator torque control method based on a range extender, the range extender and an electric automobile, and relates to the technical field of electric automobiles. According to the method, the rotating speed of the generator is obtained in real time, the corresponding torque scale factor is determined according to the rotating speed of the generator, and the torque value of the generator is determined according to the torque scale factor, so that the aim of gradually limiting the torque of the generator according to the rotating speed of the generator when the rotating speed of the generator is close to the idle speed of the engine in the power generation process of the range extender is fulfilled, the situation that the engine is reversely dragged by the generator is effectively avoided, the damage to the engine is avoided, the important significance is provided for the service life of the range extender, meanwhile, the rotating speed of the engine is enabled to be more stable, and the experience.
Description
Technical Field
The invention relates to the technical field of electric automobiles, in particular to a generator torque control method based on a range extender, the range extender and an electric automobile.
Background
On traditional car, the diesel engine is in case the reversal, and engine speed control can be out of control, and the rotational speed can soar, gets rid of a large amount of white smoke from the air inlet, and unfiltered air will follow the blast pipe and inhale dust impurity, and aggravation cylinder liner piston and air distribution mechanism's wearing and tearing smoke and bake the pollution intake pipe, make a lot of soot of adhering to in the admission line, if can not timely control will make the engine scrap. If the gasoline engine rotates reversely, the rotating shaft of the gasoline engine drags the starting disc to rotate reversely, the starting rope with a certain length is wound on the starting disc, the rotating shaft and the flywheel of the engine can be forced to obtain certain positive rotation power by pulling the starting rope, and the engine can be normally started by matching with the ignition function of the ignition system. When the engine is in the starting process, the rotation speed of the rotating shaft is very unstable, so that the ignition angle calculated by an ignition system (particularly a digital ignition system) can deviate from the true required angle, and in severe cases, the rotating shaft of the engine can be instantaneously reversed. If the starting disc is reversed, the starting rope is wound more and more tightly, and once the force is too large, the starting rope can be broken, and the starting system is damaged.
In the range-extended electric automobile, the generator drags the engine to start when the range extender is started; in the power generation process of the range extender, the generator provides negative torque for the engine in a reverse direction, the engine drags the generator to rotate together, and the generator generates power. In the process, if the negative torque of the generator is too large, when the rotating speed of the generator is close to the idling rotating speed of the engine, the engine is easy to rotate reversely, the engine is damaged, and the service life of the range extender is influenced. Therefore, when the rotating speed of the generator is close to the idling rotating speed of the engine, the adjustment of the torque of the generator is of great significance.
Disclosure of Invention
The invention aims to provide a generator torque control method based on a range extender, which determines a corresponding torque scale factor according to the rotating speed of a generator, so that when the rotating speed of the generator is close to the idling speed of an engine, the torque of the generator is adjusted through the torque scale factor, and the reverse rotation of the engine caused by overlarge torque is prevented.
The invention also aims to provide a range extender, wherein a range extender controller determines a corresponding torque scale factor according to the rotating speed of the generator acquired in real time, and adjusts the torque of the generator through the torque scale factor, so that gradual torque limitation is realized when the rotating speed of the generator is close to the idling speed of the engine, and the generator is prevented from dragging the engine reversely.
The invention also aims to provide an electric automobile applying the range extender.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:
in a first aspect, the present invention provides a generator torque control method based on a range extender, including: acquiring the rotating speed of the generator in real time; determining a corresponding torque scale factor according to the rotating speed of the generator; determining a torque value of the generator as a function of the torque scaling factor.
Further, the range extender-based generator torque control method further comprises: calculating an initial torque value of the generator; the step of determining a torque value of the generator in dependence on the torque scaling factor comprises: taking the product of the torque scaling factor and the initial torque value as the torque value of the generator.
Further, the step of determining a corresponding torque scaling factor in dependence on the rotational speed of the generator comprises: determining that the torque scaling factor decreases with decreasing rotational speed of the generator when the rotational speed of the generator is within a preset threshold range.
Further, the step of determining a corresponding torque scaling factor in dependence on the rotational speed of the generator comprises: and when the rotating speed of the generator is lower than the lower limit value of a preset threshold range, determining the torque scale factor as a first set value.
Further, the step of determining a corresponding torque scaling factor in dependence on the rotational speed of the generator comprises: and when the rotating speed of the generator exceeds the upper limit value of the preset threshold range, determining the torque scale factor as a second set value.
In a second aspect, the invention further provides a range extender, which includes a range extender controller and a generator, wherein the range extender controller is electrically connected with the generator; the range extender controller is used for acquiring the rotating speed of the generator in real time, determining a corresponding torque scale factor according to the rotating speed of the generator, and determining a torque value of the generator according to the torque scale factor.
In a third aspect, the invention further provides an electric vehicle, which includes a fuel supply system, a power battery, and the power battery, wherein the range extender further includes an engine, the engine is connected to the generator, the fuel supply system is configured to supply fuel to the engine, and the power battery is configured to be charged by the generator.
Compared with the prior art, the invention has the following beneficial effects:
according to the generator torque control method based on the range extender, the range extender and the electric automobile, the range extender controller obtains the rotating speed of the generator in real time, determines the corresponding torque scale factor according to the rotating speed of the generator, and determines the torque value of the generator according to the torque scale factor. When the rotating speed of the generator is within a preset threshold range, the torque scale factor is controlled to be reduced along with the reduction of the rotating speed of the generator, and therefore the process of gradual torque limiting is achieved. When the rotating speed of the generator is lower than the lower limit value of the preset threshold range, the torque scale factor is controlled to be 0, so that the torque of the generator is 0, the phenomenon that the engine rotates reversely due to the fact that the generator drags the engine reversely is effectively avoided, and the method has important significance for the service life of the range extender. In addition, in the process from starting to generating power of the range extender or from generating power to stopping, the rotating speed of the engine is ensured to be more stable due to a gradual torque unloading mechanism.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 shows a block diagram of a range extender provided in a first embodiment of the present invention.
FIG. 2 shows a functional block diagram of the range extender controller determining a torque value for the generator.
Fig. 3 shows a block diagram of an electric vehicle according to a second embodiment of the present invention.
Fig. 4 shows a flow chart of a generator torque control method based on a range extender according to a third embodiment of the invention.
Icon: 10-electric vehicle; 100-a range extender; 200-a fuel supply system; 300-a power battery; 110-a range extender controller; 120-a generator; 130-an engine; 140-a generator controller; 150-engine controller.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
First embodiment
Fig. 1 is a block diagram of a range extender 100 according to a first embodiment of the present invention. As shown in fig. 1, the range extender 100 includes a range extender controller 110, a generator 120, and an engine 130, the range extender controller 110 is electrically connected to the generator 120, and the generator 120 is connected to the engine 130.
In the present embodiment, the generator 120 and the engine 130 are mechanically connected in a coaxial manner, during the starting process of the range extender 100, the generator 120 drives the engine 130 to rotate to realize the starting of the engine 130, and during the power generation process of the range extender 100, the generator 120 applies a negative torque to the engine 130 in a reverse direction, the engine 130 drags the generator 120 to rotate together, and the generator 120 generates power.
The range extender controller 110 is configured to obtain a rotation speed of the generator 120 in real time, determine a corresponding torque scaling factor according to the rotation speed of the generator 120, determine a torque value of the generator 120 according to the torque scaling factor, and further implement adjustment of the torque of the generator 120.
In this embodiment, the range extender 100 further includes a generator controller 140, and the generator controller 140 is electrically connected to both the generator 120 and the range extender controller 110. Specifically, the range extender Controller 110 and the generator Controller 140 may communicate with each other through a Controller Area Network (CAN), the generator Controller 140 is configured to monitor an operation state of the generator 120 and transmit data in real time, and the range extender Controller 110 is configured to obtain a rotation speed of the generator 120 in real time through the generator Controller 140. After the range extender controller 110 determines the final torque value of the generator 120 according to the torque scaling factor, the range extender controller 110 is further configured to output a torque control command to the generator controller 140 according to the torque value of the generator 120, so that the generator controller 140 controls the torque of the generator 120 according to the torque control command, and the torque of the generator 120 is prevented from being too large to cause the reverse rotation of the engine 130.
Further, in the present embodiment, the range extender controller 110 is further configured to calculate an initial torque value of the generator 120, and take the product of the torque scaling factor and the initial torque value as the torque value of the generator 120. As shown in FIG. 2, a functional block diagram of determining a torque value of the generator 120 for the range extender controller 110. That is, in the power generation process of the range extender 100, after calculating the initial torque value of the generator 120 that needs to be given each time, the range extender controller 110 determines the corresponding torque scaling factor according to the rotation speed of the generator 120 instead of controlling the torque of the generator 120 to the engine 130 directly according to the initial torque value, and multiplies the calculated initial torque value by the torque scaling factor to obtain the final torque value to be output to the generator 120.
It should be noted that, in the present embodiment, the torque scaling factor may be determined as follows: when the rotational speed of the generator 120 is within a preset threshold range, the range extender controller 110 determines that the torque scaling factor decreases as the rotational speed of the generator 120 decreases. When the rotation speed of the generator 120 is lower than the lower limit value of the preset threshold range, the range extender controller 110 determines that the torque scaling factor is the first set value, and when the rotation speed of the generator 120 exceeds the upper limit value of the preset threshold range, the range extender controller 110 determines that the torque scaling factor is the second set value.
In the present embodiment, when the range extender 100 enters the power generation state from the idle speed or exits from the power generation state to the idle speed, the rotation speed of the generator 120 may approach the idle rotation speed of the engine 130, which may easily cause the engine 130 to rotate reversely. The range extender controller 110 is preset with a threshold range, which is a range near the idle speed of the engine 130, and preferably, the upper limit value and the lower limit value of the threshold range are slightly higher than the idle speed of the engine 130. The range extender controller 110 may determine the torque scaling factor corresponding to the rotation speed of the generator 120 by determining the relationship between the rotation speed of the generator 120 and the preset threshold range.
Specifically, when the rotation speed of the generator 120 is higher than the upper limit value of the preset threshold range, the rotation speed of the generator 120 has a large difference from the rotation speed of the engine 130 at the idle speed, the torque of the generator 120 to the engine 130 is small, and the torque scaling factor at this time is taken as 1, that is, the range extender controller 110 maintains the calculated initial torque value to output. When the rotating speed of the generator 120 is reduced to be within the preset threshold range, the rotating speed of the generator 120 is already close to the idle rotating speed of the engine 130, and at this time, the determined torque scaling factor is linearly reduced along with the reduction of the rotating speed of the generator 120, so that the process of gradually limiting the torque is achieved. When the rotating speed of the generator 120 is lower than the lower limit value of the threshold range, the torque scale factor is 0, so that the torque of the generator 120 is 0, and the reverse rotation of the engine 130 caused by the reverse dragging of the generator 120 is effectively avoided.
Second embodiment
Referring to fig. 3, a block diagram of an electric vehicle 10 according to a second embodiment of the invention is shown. As shown in fig. 3, the electric vehicle 10 includes a fuel supply system 200, a power battery 300, and the range extender 100 provided in the first embodiment. In the present embodiment, the range extender 100 further includes an engine controller 150, and the engine controller 150 is electrically connected to both the engine 130 and the range extender controller 110. Specifically, the range extender controller 110 and the engine controller 150 CAN also communicate with each other through the CAN, the engine controller 150 CAN monitor the operating state of the engine 130 and transmit data in real time, the range extender controller 110 obtains the operating states of the generator 120 and the engine 130 through the generator controller 140 and the engine controller 150, respectively, when the engine 130 or the generator 120 is detected to have a fault, the range extender controller 110 CAN send processing signals to the engine 130 and the generator 120, when an emergency occurs, the emergency stop CAN be realized, the damage to the range extender 100 is avoided, and the driving safety of a user CAN be ensured to a certain extent.
The fuel supply system 200 is used for supplying fuel to the engine 130 after the range extender 100 is started, the generator 120 has two operation modes of starting and generating electricity, the power battery 300 is used for supplying energy to the generator 120 when the range extender 100 is started so that the generator 120 drags the engine 130 to rotate, after the range extender 100 is started, the generator 120 is driven by the engine 130 to rotate, the generator 120 serves as a load to generate electricity, and the power battery 300 is used for charging the electricity generated by the generator 120, so that the normal operation of the electric automobile 10 is ensured.
It is understood that, in the present embodiment, when the amount of electricity in the power battery 300 is sufficient, the electric vehicle 10 runs in the electric only mode, and when the amount of electricity in the power battery 300 is insufficient, the range extender 100 is started to operate, and the generator 120 generates electricity to generate electric energy to charge the power battery 300, so as to greatly improve the driving range of the electric vehicle 10. In the power generation process of the range extender 100, when the rotation speed of the generator 120 is close to the idle rotation speed of the engine 130, a mechanism of gradually unloading the torque of the generator 120 by determining the corresponding torque scale factor according to the rotation speed of the generator 120 is implemented, so that the reverse rotation of the engine 130 caused by the reverse dragging of the engine 130 by the generator 120 is effectively avoided, and the rotation speed of the engine 130 is ensured to be more stable.
Third embodiment
Fig. 4 is a schematic flow chart of a generator torque control method based on a range extender according to a third embodiment of the present invention. It should be noted that the torque control method of the generator based on the range extender according to the embodiment of the present invention is not limited by the specific sequence shown in fig. 4 and described below, the basic principle and the technical effects thereof are the same as those of the first embodiment, and for the sake of brief description, the corresponding contents in the first embodiment can be referred to for the parts not mentioned in this embodiment. It should be understood that in other embodiments, the order of some steps in the range extender-based generator torque control method of the present invention may be interchanged according to actual needs, or some steps may be omitted or deleted. The generator torque control method based on the range extender according to the embodiment of the present invention can be applied to the range extender 100, and the specific process shown in fig. 4 will be described in detail below.
Step S101, an initial torque value of the generator 120 is calculated.
In the embodiment, after the range extender controller 110 calculates the initial torque value that needs to be output originally, the torque of the generator 120 is not directly controlled by the initial torque value, but the initial torque value needs to be adjusted after the torque scaling factor is determined.
Step S102, the rotation speed of the generator 120 is acquired in real time.
In this embodiment, the range extender controller 110 obtains the rotation speed of the generator 120 in real time through the generator controller 140.
Step S103, determining a corresponding torque scaling factor according to the rotation speed of the generator 120.
Specifically, when the rotation speed of the generator 120 is within a preset threshold range, the range extender controller 110 determines that the torque scaling factor decreases with decreasing rotation speed of the generator 120, wherein the torque scaling factor preferably decreases linearly, and a gradual limitation of the negative torque of the generator 120 is achieved. When the rotation speed of the generator 120 is lower than the lower limit value of the preset threshold range, the range extender controller 110 determines that the torque scaling factor is a first set value (for example, the first preset value is 0). When the rotation speed of the generator 120 exceeds the upper limit value of the preset threshold range, the range extender controller 110 determines that the torque scaling factor is a second set value (for example, the second preset value is 1).
Step S104, determining a torque value of the generator 120 according to the torque scaling factor.
In the present embodiment, the range extender controller 110 takes the product of the torque scaling factor determined above and the initial torque value calculated as the final torque value of the generator 120. The range extender controller 110 outputs a torque control instruction to the generator controller 140 according to the finally determined torque value, and then controls the torque of the generator 120 through the generator controller 140, so that the purpose of gradually unloading torque is achieved, and the reverse rotation of the engine 130 is effectively avoided.
In summary, in the generator torque control method based on the range extender, the range extender and the electric vehicle provided in the embodiment of the present invention, the range extender controller determines the torque scaling factor according to the acquired rotation speed of the generator, the torque scaling factor is taken as 1 when the rotation speed of the generator is higher than the upper limit value of the preset threshold range, the torque scaling factor is linearly reduced along with the reduction of the rotation speed of the generator when the rotation speed of the generator is within the preset threshold range, and the torque scaling factor is determined as 0 when the rotation speed of the generator is lower than the lower limit value of the preset threshold range; after the torque scaling factor is determined, the range extender controller takes the product of the calculated initial torque value and the determined torque scaling factor as the torque value that is ultimately output to the generator. Therefore, in the power generation process of the range extender, when the rotating speed of the generator is close to the idling rotating speed of the engine, the gradual torque unloading mechanism is adopted, the reverse rotation of the engine is effectively prevented, the important significance is provided for the service life of the range extender, meanwhile, the rotating speed of the engine is enabled to be more stable, and the experience feeling of a user is better.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Claims (7)
1. A range extender-based generator torque control method, comprising:
acquiring the rotating speed of the generator in real time;
determining a corresponding torque scale factor according to the rotating speed of the generator; determining a torque value of the generator as a function of the torque scaling factor;
the step of determining a corresponding torque scaling factor in dependence upon the rotational speed of the generator comprises: when the rotating speed of the generator is lower than the lower limit value of a preset threshold range, determining the torque scale factor as a first set value; the first set value is 0; the threshold range is a range around the idle speed of the engine; the lower limit value of the threshold value range is slightly higher than the idle speed of the engine;
calculating an initial torque value of the generator;
the step of determining a torque value of the generator in dependence on the torque scaling factor comprises: taking the product of the torque scaling factor and the initial torque value as the torque value of the generator.
2. The range extender-based generator torque control method of claim 1, wherein the step of determining a corresponding torque scaling factor as a function of the rotational speed of the generator comprises:
determining that the torque scaling factor decreases with decreasing rotational speed of the generator when the rotational speed of the generator is within a preset threshold range.
3. The range extender-based generator torque control method of claim 1, wherein the step of determining a corresponding torque scaling factor as a function of the rotational speed of the generator comprises:
and when the rotating speed of the generator exceeds the upper limit value of the preset threshold range, determining the torque scale factor as a second set value.
4. The range extender is characterized by comprising a range extender controller and a generator, wherein the range extender controller is electrically connected with the generator;
the range extender controller is used for acquiring the rotating speed of the generator in real time, determining a corresponding torque scale factor according to the rotating speed of the generator, and determining a torque value of the generator according to the torque scale factor;
the range extender controller is used for determining the torque scale factor as a first set value when the rotating speed of the generator is lower than the lower limit value of a preset threshold range; the first set value is 0; the threshold range is a range around the idle speed of the engine; the lower limit value of the threshold value range is slightly higher than the idle speed of the engine;
the range extender controller is further configured to calculate an initial torque value of the generator, and take the product of the torque scaling factor and the initial torque value as the torque value of the generator.
5. The range extender of claim 4, wherein the torque scaling factor is determined to decrease with decreasing rotational speed of the generator when the rotational speed of the generator is within a preset threshold range, and the torque scaling factor is determined to be a second set value when the rotational speed of the generator exceeds an upper limit value of the preset threshold range.
6. The range extender of claim 4, further comprising a generator controller electrically connected to both the generator and the range extender controller;
the range extender controller is used for acquiring the rotating speed of the generator in real time through the generator controller;
the range extender controller is further used for outputting a torque control instruction to the generator controller according to the torque value of the generator, so that the generator controller controls the torque of the generator according to the torque control instruction.
7. An electric vehicle comprising a fuel supply system and a power battery, wherein the electric vehicle further comprises the range extender of any one of claims 4-6, the range extender further comprises an engine, the engine is connected with the generator, the fuel supply system is used for supplying fuel to the engine, and the power battery is used for charging through the generator.
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| CN201810290038.5A CN108515849B (en) | 2018-04-03 | 2018-04-03 | Generator torque control method based on range extender, range extender and electric automobile |
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| CN111137137A (en) * | 2018-11-05 | 2020-05-12 | 宝沃汽车（中国）有限公司 | Control method and system of hybrid electric vehicle and hybrid electric vehicle |
| CN110281910A (en) * | 2019-06-28 | 2019-09-27 | 浙江吉利控股集团有限公司 | A kind of distance increasing unit method for starting-controlling, device and equipment |
| CN110758125B (en) * | 2019-12-30 | 2020-03-24 | 宁波洁程汽车科技有限公司 | Control system and method for power quick response of range extender for electric automobile |
| CN112092798B (en) * | 2020-08-28 | 2023-08-08 | 广西玉柴机器股份有限公司 | Range extender reverse rotation protection control system and range extender reverse rotation protection control method |
| CN113696884B (en) * | 2021-09-15 | 2023-06-06 | 岚图汽车科技有限公司 | Method, device, equipment and storage medium for starting range extender of vehicle |
| CN114754814B (en) * | 2022-04-11 | 2023-08-29 | 武汉理工大学 | Device and method for measuring instantaneous torque and rotational speed of range extender |
| CN117284274B (en) * | 2023-11-22 | 2024-03-19 | 潍柴动力股份有限公司 | Control method and control device of range extender system of vehicle and electronic equipment |
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