CN116811833A - Control method and system for range extender of commercial vehicle - Google Patents
Control method and system for range extender of commercial vehicle Download PDFInfo
- Publication number
- CN116811833A CN116811833A CN202310741057.6A CN202310741057A CN116811833A CN 116811833 A CN116811833 A CN 116811833A CN 202310741057 A CN202310741057 A CN 202310741057A CN 116811833 A CN116811833 A CN 116811833A
- Authority
- CN
- China
- Prior art keywords
- range extender
- engine
- whole vehicle
- power
- working point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004606 Fillers/Extenders Substances 0.000 title claims abstract description 134
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000007423 decrease Effects 0.000 claims description 4
- 238000012886 linear function Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 8
- 239000000446 fuel Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 101100257262 Caenorhabditis elegans soc-1 gene Proteins 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 101150114085 soc-2 gene Proteins 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
- B60W20/13—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/24—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means
- B60W10/26—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means for electrical energy, e.g. batteries or capacitors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/06—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving electric generators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/24—Energy storage means
- B60W2510/242—Energy storage means for electrical energy
- B60W2510/244—Charge state
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
The application relates to a control method and a system of a range extender of a commercial vehicle, which relate to the technical field of the automobile manufacturing industry of the commercial vehicle, and the method comprises the following steps: presetting a plurality of engine working points of a vehicle, and presetting a first threshold value of the electric quantity of a battery of the whole vehicle; acquiring the remaining quantity of the electric quantity of the whole vehicle battery and the required power of the whole vehicle; when the residual quantity of the whole vehicle battery is smaller than the first threshold value, starting a range extender, comparing the whole vehicle required power with the average value of the power of two adjacent engine working points, if the power is smaller than the average value, selecting a lower working point as the working point of the range extender, otherwise, selecting a higher working point as the working point of the range extender; and controlling the range extender to output power at the selected working point. The application reduces the working point switching frequency of the range extender, avoids the torque fluctuation problem in the adjusting process of the range extender, ensures that the range extender works stably as a whole, has better NVH of the engine, and improves the fuel economy and emission performance of the engine.
Description
Technical Field
The application belongs to the technical field of commercial vehicle automobile manufacturing industry, and particularly relates to a control method and a control system for a range extender of a commercial vehicle.
Background
At present, most of commercial vehicles in China are conventional engines as power sources, and a small part of commercial vehicles are in hybrid power mode, and an extended range electric vehicle is one of the technologies which are more and more paid attention to.
In the related art, in the existing range extender commercial vehicle, a more adopted range extender control strategy is a power following mode, and in the mode, after the range extender is started, the range extender is required to continuously adjust the torque and the rotating speed of an engine according to the required power of the whole vehicle in real time so as to switch the working point of the engine. When the operating point of the engine is frequently switched, the more times the torque is adjusted, the more fluctuation of the torque changes at the moment, so that the NVH (Noise, vibration, harshness, noise, vibration and comfort) performance of the engine is poor, the time for reaching the next operating point is long, the stable output time is short, and the poor fuel economy and emission performance of the engine are caused. Moreover, when the required power of the whole vehicle fluctuates in a small range in real time, the working point of the engine frequently fluctuates, so that high-power discharge of the battery can be caused, and the service life of the power battery is shortened.
Disclosure of Invention
The embodiment of the application provides a control method and a control system for a range extender of a commercial vehicle, which are used for solving the technical problems that in the related art, the required power of the whole vehicle is frequently switched in real time, so that the torque is excessively adjusted, and the torque fluctuation is caused.
In a first aspect, a method for controlling a range extender of a commercial vehicle is provided, including:
presetting a plurality of engine working points of a vehicle, and presetting a first threshold value of the electric quantity of a battery of the whole vehicle;
acquiring the remaining quantity of the battery power of the whole vehicle and the required power of the whole vehicle;
when the residual quantity of the whole vehicle battery is smaller than the first threshold value, starting a range extender, comparing the whole vehicle required power with the average value of the power of two adjacent engine working points, if the power is smaller than the average value, selecting a lower working point as the working point of the range extender, otherwise, selecting a higher working point as the working point of the range extender;
and controlling the range extender to output power at the selected working point.
In some embodiments, the engine operating points are arranged within the high efficiency zone with the same engine torque resulting in an optimized engine operating curve, and the plurality of engine operating points are on the optimized engine operating curve.
In some embodiments, the optimized engine working curve is a linear expression of a linear function obtained by linearly fitting a working curve formed by torque and rotating speed working points under normal operation of the engine.
In some embodiments, the plurality of engine operating points are based on a principle of covering the power required by the whole vehicle, and the power difference between two adjacent operating points is a preset fixed step.
In some embodiments, the rotational speeds of the engines corresponding to the plurality of engine operating points increase and decrease as the engine operating point increases or decreases, and the torque of the engine remains unchanged.
In some embodiments, the controlling the range extender to output power at the selected operating point comprises: acquiring the rotation speeds of the generators corresponding to the plurality of engine operating points and the torque of the engine; the generator runs at a rotating speed corresponding to the selected working point of the range extender; the engine is switched to a torque corresponding to the selected range extender operating point.
In some embodiments, a second threshold of the battery power of the whole vehicle is preset, the second threshold is larger than the first threshold, and when the remaining amount of the battery power of the whole vehicle is larger than the second threshold, the range extender is closed.
In a second aspect, a range extender control system for a commercial vehicle is provided, comprising:
the presetting unit is used for presetting a plurality of engine working points of the vehicle and presetting a first threshold value of the electric quantity of the battery of the whole vehicle;
the acquisition unit is used for acquiring the remaining quantity of the battery power of the whole vehicle and the required power of the whole vehicle;
the comparison unit is used for starting the range extender when the residual quantity of the battery power of the whole vehicle is smaller than the first threshold value, and comparing the required power of the whole vehicle with the average value of the engine power of two adjacent engine working points;
the selection unit is used for selecting a lower working point as a range extender working point when the whole vehicle required power is smaller than the average value, or selecting a higher working point as the range extender working point;
and the range extender output unit is used for controlling the range extender to output power at the selected working point.
In some embodiments, the selecting unit obtains the rotation speed of the generator and the torque of the engine corresponding to the selected range extender operating point after the selected range extender operating point is selected;
the generator is operated at a rotational speed corresponding to the selected range extender operating point, and the engine is switched to a torque corresponding to the selected range extender operating point.
In some embodiments, the preset unit is further configured to preset a second threshold of the battery power of the whole vehicle, and when the remaining amount of the battery power of the whole vehicle is greater than the second threshold, the range extender is turned off.
The technical scheme provided by the application has the beneficial effects that:
the method comprises the steps of presetting a plurality of vehicle engine working points and a first threshold value of the electric quantity of a whole vehicle battery; judging whether to start the range extender according to the residual quantity of the battery power of the whole vehicle and the first threshold value, comparing the required power of the whole vehicle with the working point of the engine, and selecting the corresponding working point of the range extender. The working point of the range extender is adjusted according to the working point of the engine, the working point of the engine can be adjusted by adjusting the rotating speed of the generator, because the rotating speed of the generator controller is higher in adjusting speed and accuracy, the problem of torque fluctuation in the adjusting process of the range extender is avoided, the working point of the range extender is switched more rapidly and stably, the whole range extender works stably, the NVH of the engine is better, and the fuel economy and the emission performance of the engine are improved.
Meanwhile, different working points of the range extender are selected, so that when the required power of the whole vehicle fluctuates in a small range in real time, the working point of the engine cannot change, high-power discharge of a battery can be avoided, and the service life of the power battery is prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a range extender system according to an embodiment of the present application;
FIG. 2 is a flow chart of a method for controlling a range extender of a commercial vehicle according to an embodiment of the application;
FIG. 3 is a schematic diagram of an engine operating curve according to an embodiment of the present application;
FIG. 4 is a schematic view of a range extender operating point selection strategy according to an embodiment of the present application;
fig. 5 is a schematic diagram of a range extender system according to an embodiment of the application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The embodiment of the application provides a control method of a range extender of a commercial vehicle, which can solve the technical problem of excessive torque fluctuation caused by frequent switching of the range extender at a working point, avoid frequent switching of the working point, and improve the stable output state of an engine, thereby improving the fuel economy and NVH performance.
As shown in fig. 1, an embodiment of a range extender system is provided. The range extender system comprises an engine controller, a generator controller, an engine and a generator; and also includes related low voltage lines, high voltage lines, and CAN lines, etc. In fig. 1, a thin solid line indicates a low-voltage line, a thick solid line indicates a high-voltage line, a double-dashed line indicates a CAN line, and a single-dashed line indicates a mechanical connection.
Specifically, the whole vehicle controller of the vehicle is respectively in electric signal interaction with the engine controller and the generator controller through low-voltage lines, and communication interaction is performed through CAN lines. The engine controller and the engine interact with each other through the low voltage line and the CAN line. The generator controller and the generator are subjected to electric signal interaction through a low-voltage line, and high-voltage current transmission is performed through a high-voltage line. The engine is coupled to the generator by a mechanical connection.
The whole vehicle controller is respectively communicated with the engine controller and the generator controller through CAN signals, the whole vehicle controller sends a torque command and a rotating speed command of the engine to the engine controller, and the engine controller respectively controls the torque and the rotating speed of the engine according to the commands of the whole vehicle controller. The whole vehicle controller sends a torque command and a rotating speed command of the generator to the generator controller, and the generator controller respectively controls the torque and the rotating speed of the generator according to the command of the whole vehicle controller.
As shown in fig. 2, an embodiment of a range extender control method for a commercial vehicle is provided, which includes the following steps:
s1: and presetting a plurality of engine working points of the vehicle, and presetting a first threshold value of the electric quantity of a battery of the whole vehicle.
S2: and acquiring the remaining quantity of the battery power of the whole vehicle and the required power of the whole vehicle.
S3: judging whether the residual quantity of the electric quantity of the whole vehicle battery is smaller than the first threshold value, if so, entering S4; if not, the process proceeds to S9.
S4: the range extender is started.
S5: comparing the power required by the whole vehicle with the average value of the power of the two adjacent engine working points, judging whether the power required by the whole vehicle is smaller than the average value, if so, entering S6; if not, the process proceeds to S7.
S6: and selecting a lower working point as a working point of the range extender, and entering S8.
S7: otherwise, selecting the higher working point as the working point of the range extender, and entering S8.
S8: and controlling the range extender to output power at the selected working point, and ending the flow.
S9: the range extender is not activated.
In the step S1, a plurality of engine operating points of the vehicle are preset and selected on the optimized working curves of the transmitter. As shown in fig. 3, an engine operation graph is a general characteristic of an engine, in which an abscissa indicates an engine speed and an ordinate indicates an engine torque.
And optimizing the engine working curve to ensure that the working points of the engine working curve are arranged in a high-efficiency area under the condition that the engine torques are the same, and obtaining the optimized engine working curve. Specifically, a linear expression (a solid line and a straight line in the figure) of a linear function is obtained by linear fitting an operating curve (a broken line in fig. 3) formed by a series of torque and rotating speed operating points under normal operation of the engine.
The power difference between two adjacent working points is a preset fixed step length based on the principle of covering the whole vehicle requirement. The rotational speeds of the engines corresponding to the plurality of engine operating points are increased or decreased according to the increase or decrease of the engine operating points, and the torque of the engines is kept unchanged.
In this embodiment, 5 engine operating points P1, P2, P3, P4, and P5 are selected on the optimized operating curve, so that the range from low to high power demand of the whole vehicle can be covered, and the power, the rotation speed and the torque corresponding to the engine operating points are recorded, as shown in table 1.
TABLE 1
| Engine power | P1 | P2 | P3 | P4 | P5 |
| Corresponding rotation speed of engine | N1 | N2 | N3 | N4 | N5 |
| Torque corresponding to engine | T | T | T | T | T |
Assuming that the power range is 10kw to 50kw according to the actual whole vehicle demand, 5 working points are selected, the fixed step length of the power phase difference of the adjacent working points is set to be 10kw, wherein the power relationship is p1+40=p2+30=p3+20=p4+10=p5, the corresponding rotation speed relationship is N1 < N2 < N3 < N4 < N5, and the torque T is equal.
Power p=torque T the rotational speed N/9550, and when T is constant with greater power, N follows the power change and increases from low to high. In other embodiments, the power and rotational speed may also be set to vary from high to low.
Providing a specific embodiment of selecting the working point of the range extender in the steps S2-S7, setting the required power Preq of the whole vehicle and the first threshold SOC1 of the battery power of the whole vehicle. The whole vehicle controller collects the residual quantity of the electric quantity SOC of the whole vehicle battery, and when the electric quantity is full, the SOC is 100%; the power is used up and the SOC is 0%.
In the step S3, it is determined whether the remaining amount of the battery power of the whole vehicle is less than the first threshold, that is, whether the SOC is less than SOC1, and if so, the range extender is started. And then, according to the comparison of the whole vehicle required power and the average value in the step S5, selecting a working point of the range extender.
As shown in fig. 4, in combination with the data in table 1, the range extender operating point is selected as follows:
when (P1+P2)/2 is more than Preq more than 0, the range extender works at the point P1;
when (P2+P3)/2 is more than Preq and more than or equal to (P1+P2)/2, the range extender works at a point P2;
when (P3+P4)/2 is more than Preq and more than or equal to (P2+P3)/2, the range extender works at the point P3;
when (P4+P5)/2 is more than Preq and more than or equal to (P3+P4)/2, the range extender works at the point P4;
when Preq is more than or equal to (P4+P5)/2, the range extender works at the point P5.
In this embodiment, SOC 1=20% is set, and when the remaining amount SOC of the battery capacity of the whole vehicle is less than 20%, the range extender is started to start charging.
Substituting the fixed step size of 10kw in table 1, presetting p1=10, p2=20, p3=30, p4=40, p5=50; when 15 is more than Preq and more than 0, the range extender works at a point P1, when 25 is more than or equal to Preq and more than or equal to 15, the range extender works at a point P2, when 35 is more than or equal to 25, the range extender works at a point P3, when 45 is more than or equal to 35, the range extender works at a point P4, when the Preq is more than or equal to 45, the range extender works at a point P5.
In the step S8, after confirming the working point of the range extender, the range extender is controlled to output power at the selected working point. In addition, the rotational speeds of the generator and the torques of the engine corresponding to the plurality of engine operating points may be obtained, the generator may be operated at the rotational speeds corresponding to the selected range extender operating points, and the engine may be switched to the torques corresponding to the selected range extender operating points.
In some embodiments, the method of controlling a range extender of a commercial vehicle further comprises the step of stopping the range extender. The second threshold SOC2 of the battery power may be preset, and the second threshold is greater than or equal to the first threshold, that is, SOC2 > SOC1. When the range extender is started, the generator continuously generates power until the residual quantity of the battery is higher than a second threshold value, namely SOC is larger than SOC2, and the range extender stops working. And when the SOC 2=50% is set, and the range extender works, when the remaining quantity of the battery is greater than 50%, the range extender is closed.
In addition, when the SOC is smaller than the SOC1, the range extender is started, the working point of the range extender is selected, the generator generates electricity, and when the residual quantity of the electric quantity of the whole vehicle battery SOC is larger than or equal to the SOC 1:
1) If the vehicle is powered down and extinguished at this time, when the vehicle is restarted, the SOC1 is not more than or equal to SOC and not more than SOC2, the range extender is not started until the SOC is consumed to be less than the SOC1, and the range extender is restarted.
2) If the vehicle is in a running state all the time, when the required power of the whole vehicle is smaller, the electric energy generated by the generator can meet the required power of the whole vehicle and can charge the battery, and then after the SOC is more than SOC2, the range extender is closed.
The application also provides an embodiment of the range extender control system of the commercial vehicle, which comprises a preset unit, an acquisition unit, a comparison unit and a selection unit which are arranged on the whole vehicle controller, and also comprises a range extender output unit.
The presetting unit is used for presetting a plurality of engine working points of the vehicle and presetting a first threshold value of the electric quantity of the battery of the whole vehicle.
And the acquisition unit is used for acquiring the remaining quantity of the battery power of the whole vehicle and the required power of the whole vehicle.
The comparison unit is used for comparing the residual quantity of the battery power of the whole vehicle with a first threshold value SOC1, starting the range extender when the SOC is smaller than the SOC1, and comparing the required power of the whole vehicle with the average value of the engine power of two adjacent engine working points.
And the selection unit is used for selecting a lower working point as the working point of the range extender when the required power of the whole vehicle is smaller than the average value, or selecting a higher working point as the working point of the range extender.
And the range extender output unit is used for controlling the range extender to output power at the selected working point.
Further, the selecting unit obtains the rotation speed of the generator and the torque of the engine corresponding to the selected range extender operating point after selecting the range extender operating point. The generator is operated at a rotational speed corresponding to the selected range extender operating point and the engine is switched to a torque corresponding to the selected range extender operating point.
Furthermore, the preset unit can also preset a second threshold value SOC2 of the battery power of the whole vehicle, the comparison unit is also used for comparing the residual quantity SOC of the battery power of the whole vehicle with the second threshold value SOC2, and when the SOC is more than SOC2, the range extender is closed.
The working point of the range extender can cover the range from low demand to high demand of the whole vehicle demand power and the fluctuation range of the whole vehicle demand; the torque of each working point is the same, when the range extender switches the working point, the whole vehicle controller can adjust the working point of the range extender only by adjusting the rotating speed of the generator controller under the condition of unchanged torque, because the rotating speed of the generator controller is higher in adjusting speed and accuracy, the torque fluctuation problem in the adjusting process of the range extender is avoided, the working point of the range extender is switched more rapidly at the moment, the whole range extender works stably, the vibration of the range extender in working is smaller, the noise is smaller, and the experience effect of a driver is improved.
It should be noted that in the present application, relational terms such as "first" and "second" and the like are 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. Moreover, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility vehicle range extender control method is characterized by comprising the following steps:
presetting a plurality of engine working points of a vehicle, and presetting a first threshold value of the electric quantity of a battery of the whole vehicle;
acquiring the remaining quantity of the electric quantity of the whole vehicle battery and the required power of the whole vehicle;
when the residual quantity of the whole vehicle battery is smaller than the first threshold value, starting a range extender, comparing the whole vehicle required power with the average value of the power of two adjacent engine working points, if the power is smaller than the average value, selecting a lower working point as the working point of the range extender, otherwise, selecting a higher working point as the working point of the range extender;
and controlling the range extender to output power at the selected working point.
2. The range extender control method for a commercial vehicle as claimed in claim 1, wherein the engine operating points are arranged in a high efficiency zone with the same engine torque to obtain an optimized engine operating curve, and the plurality of engine operating points are on the optimized engine operating curve.
3. The control method of the range extender of the commercial vehicle according to claim 2, wherein the optimized engine working curve is a linear expression of a linear function obtained by linearly fitting a working curve formed by torque and rotating speed working points of the engine under normal operation.
4. The control method of a range extender for a commercial vehicle according to claim 1 or 2, wherein the plurality of engine operating points are based on a principle of covering the required power of the whole vehicle, and the power difference between two adjacent operating points is a preset fixed step.
5. The range extender control method for a commercial vehicle according to claim 4, wherein the rotational speeds of the engines corresponding to the plurality of engine operating points are increased or decreased with an increase or decrease in the engine operating point, and the torque of the engine is maintained.
6. The method of controlling a range extender for a commercial vehicle of claim 1, wherein said controlling the range extender to output power at a selected operating point comprises:
acquiring the rotation speeds of the generators corresponding to the plurality of engine operating points and the torque of the engine;
the generator runs at a rotating speed corresponding to the selected working point of the range extender; the engine is switched to a torque corresponding to the selected range extender operating point.
7. The method for controlling a range extender of a commercial vehicle according to claim 1, wherein a second threshold value of the battery power of the whole vehicle is preset, the second threshold value is larger than the first threshold value, and the range extender is turned off when the remaining amount of the battery power of the whole vehicle is larger than the second threshold value.
8. A range extender control system for a commercial vehicle, comprising:
the presetting unit is used for presetting a plurality of engine working points of the vehicle and presetting a first threshold value of the electric quantity of the battery of the whole vehicle;
the acquisition unit is used for acquiring the remaining quantity of the battery power of the whole vehicle and the required power of the whole vehicle;
the comparison unit is used for starting the range extender when the residual quantity of the battery power of the whole vehicle is smaller than the first threshold value, and comparing the required power of the whole vehicle with the average value of the engine power of two adjacent engine working points;
the selection unit is used for selecting a lower working point as a range extender working point when the whole vehicle required power is smaller than the average value, or selecting a higher working point as the range extender working point;
and the range extender output unit is used for controlling the range extender to output power at the selected working point.
9. The range extender control system of claim 8 wherein,
the selection unit acquires the rotating speed of the generator and the torque of the engine corresponding to the working point of the range extender after selecting the working point of the range extender;
the generator is operated at a rotational speed corresponding to the selected range extender operating point, and the engine is switched to a torque corresponding to the selected range extender operating point.
10. The range extender control system of claim 8 or 9, wherein the preset unit is further configured to preset a second threshold value for the battery level of the whole vehicle, and the range extender is turned off when the remaining amount of the battery level of the whole vehicle is greater than the second threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310741057.6A CN116811833A (en) | 2023-06-20 | 2023-06-20 | Control method and system for range extender of commercial vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310741057.6A CN116811833A (en) | 2023-06-20 | 2023-06-20 | Control method and system for range extender of commercial vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116811833A true CN116811833A (en) | 2023-09-29 |
Family
ID=88140542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310741057.6A Pending CN116811833A (en) | 2023-06-20 | 2023-06-20 | Control method and system for range extender of commercial vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116811833A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118025124A (en) * | 2024-04-12 | 2024-05-14 | 潍柴动力股份有限公司 | Energy control method and device of range extender, electronic equipment and storage medium |
-
2023
- 2023-06-20 CN CN202310741057.6A patent/CN116811833A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118025124A (en) * | 2024-04-12 | 2024-05-14 | 潍柴动力股份有限公司 | Energy control method and device of range extender, electronic equipment and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110040004B (en) | Power following control method and system of range-extended pure electric vehicle | |
| US10160307B2 (en) | System and method for controlling motor temperature for green car | |
| CN111688540B (en) | Control method for full life cycle power battery of hybrid electric vehicle | |
| CN112590528B (en) | Hybrid power system, hybrid power vehicle, control method of hybrid power vehicle and vehicle control unit | |
| KR101628516B1 (en) | Method for controlling ldc voltage of hybrid vehicle | |
| US7232401B2 (en) | Method of compensating torque at cylinder switching on a DOD engine with electric parallel hybrid | |
| US7789796B2 (en) | Method for controlling idle stop mode in hybrid electric vehicle | |
| CN102815295B (en) | A kind of power-control method of series parallel hybrid power vehicle | |
| CN104477041A (en) | Power following control method of battery electric vehicle range extender | |
| KR101714206B1 (en) | System and method for controlling engine and motor of environment-friendly vehicle | |
| CN110550018B (en) | Energy management method of extended range hybrid electric vehicle | |
| CN102442300A (en) | System and method for idle charge of hybrid vehicle | |
| KR20180022127A (en) | Method and device for controlling output of low voltage DC-DC converter in environmentally friendly vehicle | |
| CN116811833A (en) | Control method and system for range extender of commercial vehicle | |
| CN113829864B (en) | Hybrid power system, hybrid power vehicle, control method of hybrid power vehicle and vehicle control unit | |
| CN112092650B (en) | Range-extending electric vehicle and control method, device and storage medium thereof | |
| CN108068796B (en) | System and method for controlling driving motor of vehicle | |
| JP2020157861A (en) | Control device | |
| CN105437986B (en) | Electric vehicle power following device and control method | |
| CN114389323A (en) | Method for reducing the total power consumption of a parked vehicle | |
| CN116674523A (en) | Torque distribution method and device for hybrid electric vehicle, vehicle and storage medium | |
| CN111959483B (en) | Control method and device and vehicle | |
| CN116733618A (en) | Method for selecting working point of range extender, range extender control method and system | |
| JP2021020657A (en) | Vehicular control device | |
| CN213831347U (en) | Low-voltage intelligent power supply system of hybrid electric vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |