CN111775724A - Method for selecting and switching working points of range extender - Google Patents
Method for selecting and switching working points of range extender Download PDFInfo
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- CN111775724A CN111775724A CN202010746058.6A CN202010746058A CN111775724A CN 111775724 A CN111775724 A CN 111775724A CN 202010746058 A CN202010746058 A CN 202010746058A CN 111775724 A CN111775724 A CN 111775724A
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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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L15/2045—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for optimising the use of energy
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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
- B60L2260/00—Operating Modes
- B60L2260/40—Control modes
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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
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention provides a method for selecting and switching working points of a range extender, and belongs to the field of range extender control. The method comprises the following steps: establishing a universal characteristic diagram of the range extender comprising a plurality of range extender parameter data; establishing a corresponding relation table of each target optimization parameter and the power of the range extender, the rotating speed of the range extender and the vehicle speed, wherein the target optimization parameters comprise the noise of the range extender and the oil consumption of the range extender; determining corresponding target optimization parameters according to the vehicle speed and/or the power requirement of the range extender; searching corresponding multiple range extender rotating speeds in a corresponding relation table corresponding to the target optimization parameters to obtain multiple preselected working points represented by range extender power and range extender rotating speeds; determining the priority of the range extender parameters after the target optimization parameters are removed according to the vehicle speed and/or the range extender power; comparing the corresponding range extender parameters of the plurality of preselected working points in the universal characteristic diagram; and selecting an optimized working point of the range extender according to the priority and the comparison result. The invention can accurately select a proper working point.
Description
Technical Field
The invention belongs to the field of range extender control, and particularly relates to a method for selecting and switching working points of a range extender.
Background
The range-extended electric automobile is a pure electric drive vehicle which reduces the electric quantity of a power battery and increases a range extender system on the basis of the pure electric automobile. The range extender generally has single-point, multi-point and linear control modes. In any mode, the working point of the range extender is selected mainly based on pursuing low oil consumption, and the working point or the working curve of the range extender is in a high-efficiency area. For the multi-point control range extender, the range extender only operates at a certain point of a plurality of selected and determined high-efficiency working points under a stable working condition, and the range extender switches between different working points along with the continuous change of the power requirement of the whole vehicle and the SOC value of the power battery. The selection and switching strategy of the working point directly influences the performances of oil consumption, vibration, noise, emission and the like of the whole vehicle.
In the range-extended electric automobile, the range extender is only used for generating power and does not directly participate in driving, and due to the existence of the power battery, decoupling is realized between the output power of the range extender and the required power of the whole automobile, namely the output power of the range extender has no direct relation with the required power of the whole automobile and is related to a working point control mode, the SOC of the power battery and the like. The operating point of the range extender is therefore selected with its freedom and different rotational speed-torque operating points can be selected for the same power.
The vibration noise of the range extender mainly comes from an engine, and has a certain nonlinear positive correlation with the rotating speed of the engine, the higher the rotating speed is, the more intense the vibration noise is, and particularly, the vibration noise is more obvious when the vehicle runs at low speed and is accelerated; when the rotating speed is too low, the range extender has low efficiency and poor emission, and the rotating speed has larger influence on vibration noise compared with torque.
The selection strategy of the working point of the range extender disclosed in the prior patents and papers only generally mentions that the relation between the rotating speed of the range extender and the vehicle speed should be established, and the working point of the range extender selected at present mainly pursues low oil consumption and lacks consideration of factors such as emission, NVH (noise, vibration and harshness) and vehicle speed, so that the selected working point of the range extender is not strict and reasonable.
Disclosure of Invention
One object of the present invention is to provide a method for selecting and switching operating points of a range extender, which can accurately select a suitable operating point.
It is another object of the present invention to reduce the cost of an exhaust after-treatment device.
It is a further object of the present invention to maximize range extender operation in the high efficiency zone.
Particularly, the invention provides a method for selecting and switching working points of a range extender, which comprises the following steps:
establishing a universal characteristic diagram of the range extender comprising a plurality of range extender parameter data;
establishing a corresponding relation table of each target optimization parameter and the power, the rotating speed and the vehicle speed of the range extender, wherein the target optimization parameters comprise the noise and the oil consumption of the range extender;
determining corresponding target optimization parameters according to the vehicle speed and/or the power requirement of the range extender;
searching a plurality of corresponding range extender rotating speeds in the corresponding relation table corresponding to the corresponding target optimization parameters to obtain a plurality of preselected working points represented by the range extender power and the range extender rotating speed;
determining the priority of the range extender parameters after the target optimization parameters are removed according to the vehicle speed and/or the range extender power;
comparing the corresponding range extender parameters of a plurality of preselected working points in the universal characteristic diagram;
and selecting an optimized working point of the range extender according to the priority and the comparison result.
Optionally, the plurality of range extender parameters includes range extender oil consumption, generator system efficiency, range extender NVH characteristics, and range extender raw emissions.
Optionally, the step of establishing a corresponding relationship table between each target optimization parameter and the range extender power, the range extender rotating speed and the vehicle speed includes:
and establishing a first corresponding relation table of the noise of the range extender, the power of the range extender, the rotating speed of the range extender and the vehicle speed through a calibration test with the minimum noise of the range extender as an optimization aim.
Optionally, the step of establishing a first corresponding relationship table of the range extender noise, the range extender power, the range extender rotating speed and the vehicle speed through a calibration test with the purpose of minimizing the noise of the range extender as the optimization purpose comprises:
selecting n range extender powers and m vehicle speeds as variables of a calibration test;
selecting multiple groups of range extender rotating speed-torque points corresponding to the power of the ith range extender, wherein i is 1, 2, 3 and … … n;
recording a rotating speed-torque point with the lowest noise of the range extender when the vehicle runs at the power of the ith range extender and the speed of the jth vehicle, wherein j is 1, 2, 3 and … … m;
and arranging the range extender rotating speed, the range extender power and the vehicle speed corresponding to the rotating speed-torque point with the lowest noise of the range extender into the first corresponding relation table.
Optionally, the step of establishing a corresponding relationship table between each target optimization parameter and the range extender power, the range extender rotating speed and the vehicle speed includes:
and establishing a second corresponding relation table of the oil consumption of the range extender, the power of the range extender, the rotating speed of the range extender and the vehicle speed through a calibration test and the universal characteristic diagram with the minimum oil consumption of the range extender as an optimization aim.
Optionally, the step of establishing a second corresponding relation table of the oil consumption of the range extender, the power of the range extender, the rotating speed of the range extender and the vehicle speed through a calibration test and the universal characteristic diagram with the purpose of optimizing the minimum oil consumption of the range extender comprises the following steps:
selecting n range extender powers as variables of a calibration test;
selecting multiple groups of range extender rotating speed-torque points corresponding to the power of the ith range extender, wherein i is 1, 2, 3 and … … n;
selecting a rotating speed-torque point with the lowest oil consumption of the range extender corresponding to the power of the ith range extender on the universal characteristic diagram;
and arranging the rotating speed, the vehicle speed and the power of the range extender corresponding to the rotating speed-torque point with the lowest oil consumption of the range extender into the second corresponding relation table.
Optionally, after the step of establishing a second corresponding relationship table of the oil consumption of the range extender, the power of the range extender, the rotating speed of the range extender and the vehicle speed through a calibration test and the universal characteristic diagram with the purpose of optimizing the minimum oil consumption of the range extender, the method further comprises the following steps:
drawing a minimum rotating speed curve and a maximum rotating speed curve in the universal characteristic diagram according to the data in the second corresponding relation table;
and when the range extender switches the working point, controlling the rotating speed of the range extender between the minimum rotating speed curve and the maximum rotating speed curve.
Optionally, the step of determining the corresponding target optimization parameter according to the vehicle speed and/or the power demand of the range extender comprises:
and when the vehicle is at a low speed, determining the target optimization parameter as the range extender noise.
Optionally, the step of determining the corresponding target optimization parameter according to the vehicle speed and/or the power demand of the range extender comprises:
and when the vehicle is in low power demand, determining the target optimization parameter as the range extender oil consumption.
The method comprises the steps of establishing a corresponding relation table of target optimization parameters, range extender power, range extender rotating speed and vehicle speed, determining the type of the target optimization parameters according to the current working condition of the vehicle (namely, the vehicle speed and the required power of the range extender are considered), and searching the appropriate range extender rotating speed in the corresponding relation table by taking the minimum noise of the range extender or the minimum oil consumption of the range extender as an optimization target. And determining the priorities of other range extender parameters according to the current working condition of the vehicle, determining an optimized working point in the universal characteristic diagram according to the priorities in some preselected working points corresponding to the suitable range extender rotating speed, and selecting the optimized working point as the working point of the range extender. The method for selecting the working point considers the current working condition of the vehicle, and can accurately select the proper working point, for example, the working point with the minimum noise of the range extender can be selected at proper time to improve the subjective driving feeling.
Furthermore, the invention integrates a plurality of range extender parameters in the universal characteristic diagram, can provide more reference variables for selecting the working points of the range extender, and can reduce the burden of an engine exhaust post-processor (such as a three-way catalytic converter) if the emission corresponding to the working points is low, thereby reducing the cost and the like.
Further, the rotating speed of the range extender is controlled between the minimum rotating speed curve and the maximum rotating speed curve when the range extender switches the working point, so that the operating curve of the transition working condition of the range extender is overlapped with the ideal curve as far as possible, and the range extender is operated in the high-efficiency area to the maximum extent on the premise of ensuring the basic driving comfort.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a flow chart of a method for selecting and switching operating points of a range extender according to an embodiment of the present invention;
FIG. 2 is a diagram of the universal characteristics of a range extender in accordance with one embodiment of the present invention;
fig. 3 is a flowchart of a method for selecting and switching an operating point of a range extender according to another embodiment of the present invention.
Detailed Description
Fig. 1 is a flowchart of a method for selecting and switching an operating point of a range extender according to an embodiment of the present invention. As shown in FIG. 1, in one embodiment, the method of the present invention comprises:
step S10: a universal characteristic map of the range extender is established, wherein the universal characteristic map comprises a plurality of range extender parameter data.
Step S20: and establishing a corresponding relation table of each target optimization parameter and the power, the rotating speed and the vehicle speed of the range extender, wherein the target optimization parameters comprise the noise of the range extender and the oil consumption of the range extender.
Step S30: and determining corresponding target optimization parameters according to the vehicle speed and/or the power demand of the range extender.
Step S40: and searching corresponding multiple range extender rotating speeds in a corresponding relation table corresponding to the corresponding target optimization parameters to obtain multiple preselected working points represented by the range extender power and the range extender rotating speed.
Step S50: and determining the priority of the range extender parameters after the target optimization parameters are removed according to the vehicle speed and/or the range extender power.
Step S60: and comparing the corresponding range extender parameters of the plurality of preselected working points in the universal characteristic diagram.
Step S70: and selecting an optimized working point of the range extender according to the priority and the comparison result.
In the embodiment, the type of the target optimization parameter is determined by establishing a corresponding relation table of the target optimization parameter and the power of the range extender, the rotating speed of the range extender and the vehicle speed according to the current working condition of the vehicle (namely, the vehicle speed and the required power of the range extender are considered), namely, the range extender with the minimum noise or the minimum oil consumption is taken as an optimization target, and the appropriate rotating speed of the range extender is searched in the corresponding relation table. And determining the priorities of other range extender parameters according to the current working condition of the vehicle, determining an optimized working point in the universal characteristic diagram according to the priorities in some preselected working points corresponding to the suitable range extender rotating speed, and selecting the optimized working point as the working point of the range extender. The method for selecting the working point considers the current working condition of the vehicle, and can accurately select the proper working point, for example, the working point with the minimum noise of the range extender can be selected at proper time to improve the subjective driving feeling.
In another embodiment, the plurality of range extender parameters includes range extender oil consumption, range extender generator system efficiency, range extender NVH characteristics, and range extender raw emissions. In other embodiments, more range extender parameter data can be added to the universal characteristic diagram according to requirements.
By integrating multiple range extender parameters in the universal characteristic diagram, more reference variables can be provided for selecting the working points of the range extender, and if the emission corresponding to the working points is low, the load of an engine emission post-processor (such as a three-way catalytic converter) can be reduced, so that the cost is reduced, and the like.
In one embodiment, step S20 includes:
and establishing a first corresponding relation table of the noise of the range extender, the power of the range extender, the rotating speed of the range extender and the vehicle speed through a calibration test by taking the minimum noise of the range extender as an optimization aim.
In a further embodiment, the step of establishing the first corresponding relation table of the range extender noise, the range extender power, the range extender rotating speed and the vehicle speed through a calibration test with the purpose of minimizing the noise of the range extender as the optimization purpose comprises the following steps:
selecting n range extender powers and m vehicle speeds as variables of a calibration test;
selecting multiple groups of range extender rotating speed-torque points corresponding to the power of the ith range extender, wherein i is 1, 2, 3 and … … n;
recording a rotating speed-torque point with the lowest noise of the range extender when the vehicle runs at the power of the ith range extender and the speed of the jth vehicle, wherein j is 1, 2, 3 and … … m;
and arranging the rotating speed, the vehicle speed and the power of the range extender corresponding to the rotating speed-torque point with the lowest noise of the range extender into a first corresponding relation table.
With power P of range extender1Vehicle speed V1For example, the calibration process of the range extender noise is as follows:
a. range-extended vehicle keeping speed V1Running, regulating range extender at P1Different speed-torque points (n) on the equal power line1-T1、n2-T2……nn-Tn) In operation, the corresponding noise values are respectively denoted as S1、S2……SnThe summary is shown in table 1 below.
TABLE 1
| Rotational speed of range extender | n1 | n2 | n3 | ...... | nn |
| Torque of range extender | T1 | T2 | T3 | ...... | Tn |
| Noise(s) | S1 | S2 | S3 | ...... | Sn |
From Table 1, the power P of the range extender can be obtained1Vehicle speed V1The lowest noise value under the condition and the corresponding rotating speed are recorded as n11。
b. The range extender power P can be obtained by the same method1Other vehicle speed (V) under the condition0、V2……Vm) Range extender rotating speed n corresponding to lower lowest noise10、n12……n1m。
c. Repeating the steps a and b to obtain the power of other range extenders and the rotating speed of the range extender corresponding to the lowest noise at the vehicle speed (for example, the power range is from 0 to the maximum power of the range extender, a value is taken every 2 kW; the vehicle speed range is from 0 to the maximum vehicle speed, a value is taken every 5 km/h; the interval value is determined according to the calibrated fineness.) and then combining the universal characteristic diagram of the range extender to establish the corresponding relation between the power, the rotating speed (or torque) and the vehicle speed of the range extender under the lowest noise condition, as shown in Table 2.
TABLE 2
In another embodiment, step S20 further includes: and establishing a second corresponding relation table of the oil consumption of the range extender, the power of the range extender, the rotating speed of the range extender and the vehicle speed through a calibration test and a universal characteristic diagram with the minimum oil consumption of the range extender as an optimization aim.
In a further embodiment, the step of establishing a second corresponding relation table of the oil consumption of the range extender, the power of the range extender, the rotating speed of the range extender and the vehicle speed through a calibration test and an universal characteristic diagram with the minimum oil consumption of the range extender as the optimization aim comprises the following steps:
selecting n range extender powers as variables of a calibration test;
selecting multiple groups of range extender rotating speed-torque points corresponding to the power of the ith range extender, wherein i is 1, 2, 3 and … … n;
selecting a rotating speed-torque point with the lowest oil consumption of the range extender corresponding to the power of the ith range extender on the universal characteristic diagram;
and arranging the rotating speed, the vehicle speed and the power of the range extender corresponding to the rotating speed-torque point with the lowest oil consumption of the range extender into a second corresponding relation table.
FIG. 2 is a diagram of the universal characteristics of a range extender in accordance with one embodiment of the present invention. Fig. 3 is a flowchart of a method for selecting and switching an operating point of a range extender according to another embodiment of the present invention. As shown in fig. 3, in some embodiments of the present invention, after the step of establishing the second mapping table of the range extender oil consumption, the range extender power, the range extender rotational speed and the vehicle speed through a calibration test and an all-purpose characteristic diagram with the purpose of optimizing the range extender oil consumption as the minimum, the method further includes:
step S80: the minimum rotational speed curve and the maximum rotational speed curve are plotted in the universal characteristic diagram according to the data in the second correspondence table (see curves a and b in fig. 2).
Step S90: and when the range extender switches the working point, controlling the rotating speed of the range extender between the minimum rotating speed curve and the maximum rotating speed curve.
The characteristics of the entire vehicle NVH and the engine are considered, the range extender adopts a proper control algorithm in the switching process of the actual working conditions, the target torque and the rotating speed instruction of the engine and the generator are quickly adjusted by accurately controlling the rotating speed and the changing slope of the torque of the range extender, so that the range extender reaches the target value of the power generation power, the rotating speed of the range extender is controlled to be between the maximum limit value and the minimum limit value, the operation curve of the transition working condition of the range extender is enabled to be overlapped with the ideal curve (the curve c in fig. 2) as far as possible, and the range extender is enabled to operate in the high-efficiency area to the maximum extent on the premise of ensuring the basic driving comfort.
In another embodiment, as shown in fig. 3, step S30 includes:
step S31: the target optimization parameter is determined to be range extender noise when the vehicle is at a low vehicle speed.
Under the condition of low vehicle speed, the masking effect of air noise and road noise during the running of the vehicle is poor, and for the working condition with relatively high power requirement, on the premise of ensuring power output, the rotating speed of an engine of the range extender is reduced as much as possible within the range of a normal value of torque output by combining the oil consumption contour line of the range extender, so as to reduce the noise, and the oil consumption and the emission performance are considered, namely the priority of the noise is emphasized. That is, the lowest noise point of the range extender, i.e., the low speed-high torque operating point, is selected in table 2 at low vehicle speeds.
In one embodiment, as shown in fig. 3, step S30 further includes:
step S32: and determining the target optimization parameter as the range extender oil consumption when the vehicle is in low power demand.
For the working condition with relatively low power requirement, on the premise of ensuring that the power output and the noise are acceptable, the rotating speed and the torque of the range extender engine cannot be too low so as to avoid over-high oil consumption, and the noise and the emission performance are considered, namely the priority of the oil consumption is emphasized.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (9)
1. A method for selecting and switching working points of a range extender is characterized by comprising the following steps:
establishing a universal characteristic diagram of the range extender comprising a plurality of range extender parameter data;
establishing a corresponding relation table of each target optimization parameter and the power, the rotating speed and the vehicle speed of the range extender, wherein the target optimization parameters comprise the noise and the oil consumption of the range extender;
determining corresponding target optimization parameters according to the vehicle speed and/or the power requirement of the range extender;
searching a plurality of corresponding range extender rotating speeds in the corresponding relation table corresponding to the corresponding target optimization parameters to obtain a plurality of preselected working points represented by the range extender power and the range extender rotating speed;
determining the priority of the range extender parameters after the target optimization parameters are removed according to the vehicle speed and/or the range extender power;
comparing the corresponding range extender parameters of a plurality of preselected working points in the universal characteristic diagram;
and selecting an optimized working point of the range extender according to the priority and the comparison result.
2. The method for selecting and switching the working points of the range extender according to claim 1, wherein the plurality of range extender parameters comprise the oil consumption of the range extender, the system efficiency of the generator, the NVH characteristic of the range extender and the original emission of the range extender.
3. The range extender operating point selection and switching method according to claim 2, wherein the step of establishing a correspondence table of each target optimization parameter with the range extender power, the range extender rotational speed and the vehicle speed comprises:
and establishing a first corresponding relation table of the noise of the range extender, the power of the range extender, the rotating speed of the range extender and the vehicle speed through a calibration test with the minimum noise of the range extender as an optimization aim.
4. The range extender operating point selecting and switching method according to claim 3, wherein the step of establishing the first corresponding relation table of the range extender noise, the range extender power, the range extender rotating speed and the vehicle speed through a calibration test with the minimum noise of the range extender as an optimization purpose comprises the following steps:
selecting n range extender powers and m vehicle speeds as variables of a calibration test;
selecting multiple groups of range extender rotating speed-torque points corresponding to the power of the ith range extender, wherein i is 1, 2, 3 and … … n;
recording a rotating speed-torque point with the lowest noise of the range extender when the vehicle runs at the power of the ith range extender and the speed of the jth vehicle, wherein j is 1, 2, 3 and … … m;
and arranging the rotating speed, the vehicle speed and the power of the range extender corresponding to the rotating speed-torque point with the lowest noise of the range extender into the first corresponding relation table.
5. The range extender operating point selection and switching method according to claim 4, wherein the step of establishing a corresponding relationship table of each target optimization parameter with the range extender power, the range extender rotational speed and the vehicle speed comprises:
and establishing a second corresponding relation table of the oil consumption of the range extender, the power of the range extender, the rotating speed of the range extender and the vehicle speed through a calibration test and the universal characteristic diagram with the minimum oil consumption of the range extender as an optimization aim.
6. The method for selecting and switching the working points of the range extender according to claim 5, wherein the step of establishing the second corresponding relation table of the oil consumption of the range extender, the power of the range extender, the rotating speed of the range extender and the vehicle speed by a calibration test and the universal characteristic diagram with the minimum oil consumption of the range extender as the optimization purpose comprises the following steps:
selecting n range extender powers as variables of a calibration test;
selecting multiple groups of range extender rotating speed-torque points corresponding to the power of the ith range extender, wherein i is 1, 2, 3 and … … n;
selecting a rotating speed-torque point with the lowest oil consumption of the range extender corresponding to the power of the ith range extender on the universal characteristic diagram;
and arranging the rotating speed of the range extender, the power of the range extender and the vehicle speed corresponding to the rotating speed-torque point with the lowest oil consumption of the range extender into the second corresponding relation table.
7. The method for selecting and switching the operating points of the range extender according to claim 5, wherein after the step of establishing the second corresponding relationship table of the oil consumption of the range extender, the power of the range extender, the rotating speed of the range extender and the vehicle speed through a calibration test and the universal characteristic diagram with the minimum oil consumption of the range extender as the optimization purpose, the method further comprises the following steps:
drawing a minimum rotating speed curve and a maximum rotating speed curve in the universal characteristic diagram according to the data in the second corresponding relation table;
and when the range extender switches the working point, controlling the rotating speed of the range extender between the minimum rotating speed curve and the maximum rotating speed curve.
8. The range extender operating point selection and switching method according to any one of claims 1 to 7, wherein the step of determining the corresponding target optimization parameter according to the vehicle speed and/or the range extender power demand comprises:
and when the vehicle is at a low speed, determining the target optimization parameter as the range extender noise.
9. The range extender operating point selection and switching method of claim 8, wherein the step of determining the corresponding target optimization parameter based on vehicle speed and/or range extender power requirements comprises:
and when the vehicle is in low power demand, determining the target optimization parameter as the range extender oil consumption.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112555033A (en) * | 2020-11-24 | 2021-03-26 | 北京车和家信息技术有限公司 | Method and device for determining working point of range extender |
| CN113654638A (en) * | 2021-08-02 | 2021-11-16 | 江铃汽车股份有限公司 | Method for obtaining high-domain map of vibration noise of electric drive system |
| CN114030462A (en) * | 2021-11-10 | 2022-02-11 | 岚图汽车科技有限公司 | Vehicle control method, device, storage medium and equipment |
| WO2024001919A1 (en) * | 2022-06-28 | 2024-01-04 | 北京罗克维尔斯科技有限公司 | Method for controlling range extender, and related device |
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| CN112555033B (en) * | 2020-11-24 | 2023-02-21 | 北京车和家信息技术有限公司 | Method and device for determining working point of range extender |
| CN113654638A (en) * | 2021-08-02 | 2021-11-16 | 江铃汽车股份有限公司 | Method for obtaining high-domain map of vibration noise of electric drive system |
| CN114030462A (en) * | 2021-11-10 | 2022-02-11 | 岚图汽车科技有限公司 | Vehicle control method, device, storage medium and equipment |
| WO2024001919A1 (en) * | 2022-06-28 | 2024-01-04 | 北京罗克维尔斯科技有限公司 | Method for controlling range extender, and related device |
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| CN111775724B (en) | 2021-09-14 |
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