CN115614132A - Control method, system and equipment of extended range electric vehicle and readable storage medium - Google Patents
Control method, system and equipment of extended range electric vehicle and readable storage medium Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
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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
- B60L50/62—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 charged by low-power generators primarily intended to support the batteries, e.g. range extenders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
- F02D31/001—Electric control of rotation speed
- F02D31/007—Electric control of rotation speed controlling fuel supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
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Abstract
The invention discloses a control method, a system and equipment of an extended range electric automobile and a readable storage medium, and relates to the technical field of vehicle control. The method comprises the following steps: controlling the engine of the current vehicle to cut off oil when the current vehicle meets the regeneration condition of the preset particle catcher; controlling the current rotating speed of the engine to reach a preset high rotating speed; controlling a generator of the current vehicle to output a preset small torque so as to enable the current rotating speed to gradually decrease until the passive regeneration of the current vehicle is finished, wherein the preset small torque is smaller than the friction torque of the engine. The invention ensures higher regeneration efficiency and avoids the problems of high energy consumption, noise, vibration and the like caused by maintaining the engine in a high rotating speed state all the time.
Description
Technical Field
The invention relates to the technical field of vehicle control, in particular to a control method, a control system, control equipment and a readable storage medium for a range-extended electric vehicle.
Background
With the development of the automobile industry, as the range-extended electric automobile has the driving feeling of a pure electric automobile and has no mileage anxiety problem of the pure electric automobile, more and more manufacturers start to produce the range-extended electric automobile. Passive regeneration is the most common way of regenerating particle traps for extended range electric vehicles. The conventional extended range electric vehicle particulate matter trap passive regeneration generally maintains a high rotational speed by dragging the engine through the generator after the engine is cut off to improve the regeneration efficiency. However, although the above method ensures higher regeneration efficiency, the problems of higher energy consumption, higher engine noise, stronger vibration and the like in the passive regeneration process result in poorer user experience.
Disclosure of Invention
The invention mainly aims to provide a control method of a range-extended electric vehicle, and aims to solve the technical problems of high energy consumption and poor user experience in a passive regeneration process of the conventional control method of the range-extended electric vehicle.
In order to achieve the above object, the present invention provides a method for controlling an extended range electric vehicle, which comprises the following steps:
controlling the engine of the current vehicle to cut off oil when the current vehicle meets the regeneration condition of the preset particle catcher;
controlling the current rotating speed of the engine to reach a preset high rotating speed;
controlling a generator of the current vehicle to output a preset small torque so as to enable the current rotating speed to gradually decrease until the passive regeneration of the current vehicle is finished, wherein the preset small torque is smaller than the friction torque of the engine.
Optionally, the step of controlling the current rotation speed of the engine to reach a preset high rotation speed includes:
judging whether the current rotating speed of the engine reaches a preset high rotating speed or not;
if the current rotating speed does not reach the preset high rotating speed, controlling the generator to output a preset large torque so as to enable the current rotating speed to reach the preset high rotating speed;
if the current rotating speed reaches the preset high rotating speed, executing the following steps: and controlling a generator of the current vehicle to output a preset small torque so as to gradually reduce the current rotating speed until the passive regeneration of the current vehicle is finished.
Optionally, the step of controlling the generator of the present vehicle to output a preset small torque, the method further comprises:
acquiring the rotating speed reduction rate of the current rotating speed;
determining the regulating quantity of the preset small torque according to the rotating speed reduction rate;
and adjusting the preset small torque according to the adjustment amount.
Optionally, the step of determining the adjustment amount of the preset small torque according to the rotation speed reduction rate includes:
when the rotating speed reduction rate is larger than a first preset rate threshold, acquiring a first rate difference value between the rotating speed reduction rate and the first preset rate threshold;
determining a first adjustment quantity of the preset small torque according to the first speed difference value so as to increase the preset small torque;
when the rotating speed reduction rate is smaller than a second preset rate threshold, acquiring a second rate difference value between the rotating speed reduction rate and the second preset rate threshold, wherein the second preset rate threshold is smaller than or equal to a first preset rate threshold;
and determining a second regulating quantity of the preset small torque according to the second speed difference value so as to reduce the preset small torque.
Optionally, before the step of controlling the engine of the present vehicle to be cut off when the present vehicle satisfies the preset particulate trap regeneration condition, the method further comprises:
obtaining working parameters of a particle catcher of a current vehicle, wherein the working parameters comprise carbon capacity and pressure values;
and when the carbon loading capacity is larger than a preset carbon loading threshold value, or the pressure value is larger than a preset pressure threshold value, judging that the current vehicle meets the regeneration condition of a preset particle catcher.
Optionally, after the step of controlling the generator of the present vehicle to output the preset small torque, the method includes:
obtaining a particle trap state of the current vehicle;
determining that the current vehicle passive regeneration is ended when the particulate trap status is that passive regeneration has been completed.
Optionally, after the step of controlling the generator of the present vehicle to output the preset small torque, the method further comprises:
judging whether the current rotating speed of the engine is smaller than a preset idling threshold value or not;
and if the current rotating speed is less than a preset idling threshold, judging that the current vehicle passive regeneration is finished.
In addition, to achieve the above object, the present invention further provides a control system of an extended range electric vehicle, the control system of the extended range electric vehicle comprising:
the oil cut-off control module is used for controlling the oil cut-off of an engine of the current vehicle when the current vehicle meets the regeneration condition of a preset particle catcher;
the rotating speed control module is used for controlling the current rotating speed of the engine to reach a preset high rotating speed;
the torque output module is used for controlling a generator of the current vehicle to output a preset small torque so as to enable the rotating speed of the engine to gradually decrease until the passive regeneration is finished, wherein the preset small torque is smaller than the friction torque of the current vehicle.
In addition, to achieve the above object, the present invention also provides a control apparatus of an extended range electric vehicle, including: the control method comprises the following steps of a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the steps of the control method of the extended range electric automobile are realized when the computer program is executed by the processor.
In addition, to achieve the above object, the present invention further provides a computer readable storage medium, wherein a control program of the extended range electric vehicle is stored on the computer readable storage medium, and when the control program of the extended range electric vehicle is executed by a processor, the steps of the control method of the extended range electric vehicle are implemented.
According to the control method of the extended range electric automobile, when the current vehicle meets the preset regeneration condition of the particle catcher, the oil cut of the engine of the current vehicle is controlled, so that air sucked into the engine can be introduced into the particle catcher without being combusted, and sufficient air is provided for passive regeneration of the particle catcher. And then controlling the current rotating speed of the engine to reach a preset high rotating speed so as to prevent the engine from entering an idling state in a short time due to a small rotating speed difference between the current rotating speed of the engine and the corresponding rotating speed of the engine in the idling state. And then controlling a generator of the current vehicle to output a preset small torque, and slowing down the speed reduction rate of the current speed of the engine to gradually reduce the current speed until the passive regeneration of the current vehicle is finished, wherein the preset small torque is smaller than the friction torque of the engine. Therefore, the invention ensures higher regeneration efficiency, and simultaneously avoids the problems of high energy consumption, noise, vibration and the like caused by maintaining the engine in a high-rotation-speed state all the time, and the invention well balances the relationship among the regeneration efficiency, the energy consumption and the user experience of passive regeneration.
Drawings
FIG. 1 is a schematic flow chart illustrating a control method of an extended range electric vehicle according to a first embodiment of the present invention;
FIG. 2 is a schematic view illustrating a second embodiment of a control method for an extended range electric vehicle according to the present invention;
FIG. 3 is a flowchart illustrating a control method for an extended range electric vehicle according to a third embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a control system of the extended range electric vehicle according to the present invention;
fig. 5 is a schematic device structure diagram of a hardware operating environment according to an embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The term "and/or" herein is merely an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone.
The terms "first" and "second," and the like in the description and in the claims of the embodiments of the present application, are used for distinguishing between different objects and not for describing a particular order of the objects. For example, the first target object and the second target object, etc. are specific sequences for distinguishing different target objects, rather than describing target objects.
In the embodiments of the present application, the words "exemplary" or "such as" are used herein to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The extended range electric vehicle has the driving feeling of a pure electric vehicle, does not have the problem of mileage anxiety of the pure electric vehicle, and is considered as one of the best routes for the traditional fuel vehicle to move to the electric vehicle. The particle catcher is an important part of the extended range electric automobile for treating PN (solid suspended particulate mass/particle quantity) emission, can catch particulate matters generated by combustion of an engine and perform particulate matter regeneration at a proper time so as to reduce exhaust back pressure. Passive regeneration is the most common way of regenerating a particle trap. The conventional passive regeneration of the extended-range electric automobile particulate matter catcher refers to a traditional fuel vehicle to control the fuel cut of an engine, so that the increase of air quantity is realized, and surplus air enters the particulate matter catcher to provide air for the oxidation regeneration of the particulate matter. However, in this way, the regeneration time is short, the particulate matter oxidation combustion time is short, and the regeneration process is inefficient. In addition, in order to further improve the regeneration efficiency, after other passive regeneration modes of the particle trap are triggered by a passive regeneration strategy, the engine is dragged to idle at a preset high rotating speed through the generator system, so that air entering the engine enters the particle trap through the exhaust system of the engine, and the oxygen content in the particle trap of the gasoline engine is further improved. Therefore, the passive regeneration time can be controlled relatively freely, and the regeneration efficiency is improved. However, in such a passive regeneration process, the generator system needs to continuously output a large torque to maintain the engine running at a high speed, which not only consumes a large amount of energy, but also makes the driver feel uncomfortable due to the noise and vibration generated by the continuous idling of the engine at a high speed, resulting in a poor user experience.
In conclusion, in the existing control method of the extended range electric vehicle, although higher regeneration efficiency is ensured, the problems of higher energy consumption, higher engine noise, stronger vibration and the like in the passive regeneration process, which result in poorer user experience, exist.
The following describes the control method of the extended range electric vehicle according to some embodiments of the present invention:
the execution main body of the Control method of the extended range electric Vehicle may be a Control device of the extended range electric Vehicle, and the Control device of the extended range electric Vehicle may be a device such as a VCU (Vehicle Control Unit), a PC (Personal Computer), a tablet Computer, a portable Computer, or a server.
In one embodiment of the invention, when the current vehicle meets the preset regeneration condition of the particle catcher, the engine of the current vehicle is controlled to be cut off, so that air sucked into the engine can be introduced into the particle catcher without being combusted, and sufficient air is provided for the passive regeneration of the particle catcher. And then controlling the current rotating speed of the engine to reach a preset high rotating speed so as to prevent the engine from entering an idling state in a short time due to a small rotating speed difference between the current rotating speed of the engine and the corresponding rotating speed when the engine is in the idling state. And then controlling a generator of the current vehicle to output a preset small torque, and slowing down the speed reduction rate of the current speed of the engine to gradually reduce the current speed until the passive regeneration of the current vehicle is finished, wherein the preset small torque is smaller than the friction torque of the engine. Therefore, the present embodiment also avoids the problems of high energy consumption, noise, vibration and the like caused by maintaining the engine in a high rotation speed state all the time while ensuring high regeneration efficiency, and the present embodiment well balances the relationship between the regeneration efficiency, the energy consumption and the user experience of passive regeneration.
Referring to fig. 1, fig. 1 is a schematic flow chart illustrating a control method of an extended range electric vehicle according to a first embodiment of the present invention. It should be noted that, although a logical order is shown in the flow chart, in some cases, the steps shown or described may be performed in an order different than that shown or described herein.
The first embodiment of the invention provides a control method of an extended range electric vehicle, which comprises the following steps:
step S100, when a current vehicle meets the regeneration condition of a preset particle catcher, controlling the engine of the current vehicle to cut off oil;
specifically, the preset particle trap regeneration condition is a scenario for determining that there is a regeneration demand for the particle trap of the current vehicle. For example, the predetermined particle trap regeneration condition may be that the carbon loading and/or pressure value of the particle trap reaches a certain corresponding predetermined high threshold. It is understood that when particulate matter (generally, carbon-containing compounds) accumulates in a particle trap (GPF) of an extended-range electric vehicle to some extent, exhaust pressure of an exhaust system of the engine is increased, which adversely affects performance (e.g., fuel consumption, power, torque, etc.) of the engine and safety of parts. Therefore, whether the particle catcher of the current vehicle needs to be regenerated can be determined by collecting the operating parameters of the particle catcher of the current vehicle, such as carbon loading, pressure values, and the like. When the current vehicle meets the preset regeneration condition of the particle catcher, the fuel cut-off signal can be sent to the engine controller to control the fuel cut-off of the engine of the current vehicle, at the moment, no fuel oil participates in combustion in a cylinder of the engine, but the engine still rotates, so that all air entering the engine enters the particle catcher, sufficient air is provided for passive regeneration of the particle catcher, and the air and high-temperature carbon particles in the particle catcher are subjected to combustion reaction, and therefore the carbon particles in the particle catcher are reduced.
Further, before the step of controlling the engine of the present vehicle to cut off oil when the present vehicle satisfies the preset particulate trap regeneration condition at step S100, the method includes:
step S110, obtaining working parameters of a particle catcher of a current vehicle, wherein the working parameters comprise carbon capacity and pressure values;
and step S120, when the carbon loading is greater than a preset carbon loading threshold value or the pressure value is greater than a preset pressure threshold value, judging that the current vehicle meets the regeneration condition of the preset particle catcher.
Specifically, the preset carbon loading threshold and the preset pressure threshold are carbon loading and pressure values at which the particle trap may adversely affect the performance of the engine and the safety of the components, and may be set according to the specific performance of the particle trap of the current vehicle, or according to the specific requirements of the current vehicle. The operating parameters of the particle trap of the current vehicle may be obtained, wherein the operating parameters include at least one of a carbon loading and a pressure value. When the carbon loading is greater than a preset carbon loading threshold (such as 15g, 18g, 20g and the like) or the pressure value is greater than a preset pressure threshold, which indicates that the particle trap may adversely affect the performance of the engine and the safety of the parts, it may be determined that the current vehicle satisfies a preset particle trap regeneration condition.
Step S200, controlling the current rotating speed of the engine to reach a preset high rotating speed;
in order to avoid that the rotation speed difference between the current rotation speed of the engine and the corresponding rotation speed of the engine in the idle state is small, so that the engine enters the idle state in a short time, the current rotation speed of the engine needs to be controlled to reach a preset high rotation speed (such as 3500r/min, 4000r/min, 4500r/min, and the like). When the engine is out of oil, if the current rotating speed of the engine does not reach the preset high rotating speed, the generator can be controlled to output preset large torque (such as 100 N.m, 120 N.m and 150 N.m), so that the engine can be dragged by the generator to run, the rotating speed of the engine is increased, and the current rotating speed of the engine reaches the preset high rotating speed. It can be understood that, if the current rotation speed of the engine has reached the preset high rotation speed, the rotation speed of the engine does not need to be increased again, and the following steps can be directly executed: and controlling a generator of the current vehicle to output a preset small torque so as to gradually reduce the current rotating speed until the passive regeneration of the current vehicle is finished.
Wherein, the step S200 of controlling the current rotation speed of the engine to reach a preset high rotation speed includes:
step S210, judging whether the current rotating speed of the engine reaches a preset high rotating speed;
step S211, if the current rotating speed does not reach the preset high rotating speed, controlling the generator to output a preset large torque so as to enable the current rotating speed to reach the preset high rotating speed;
step S212, if the current rotation speed reaches a preset high rotation speed, executing the following steps: and controlling a generator of the current vehicle to output a preset small torque so as to gradually reduce the current rotating speed until the passive regeneration of the current vehicle is finished.
Specifically, after controlling the engine to be fuel-cut, the current rotating speed of the engine may be collected, and it is determined whether the current rotating speed of the engine reaches a preset high rotating speed. The preset high rotating speed can be set according to the specific requirements of the current vehicle. If the current rotating speed does not reach the preset high rotating speed, the rotating speed difference between the current rotating speed of the engine and the corresponding rotating speed of the engine in the idle state is small, the engine can be caused to enter the idle state in a short time, the generator can be controlled to output the preset large torque, and therefore the engine can be dragged backwards through the generator to operate, the rotating speed of the engine is increased, and the current rotating speed of the engine reaches the preset high rotating speed. It is understood that the preset large torque is a positive torque. Therefore, on one hand, the engine can be prevented from entering an idling state within a short time, on the other hand, more air can be introduced when the carbon particles in the particle catcher are at a higher temperature, and the regeneration efficiency is improved. If the current rotating speed reaches the preset high rotating speed, it is indicated that the rotating speed difference between the current rotating speed of the engine and the corresponding rotating speed when the engine is in the idle state is large, and the engine does not enter the idle state in a short time, the steps can be directly executed: and controlling a generator of the current vehicle to output a preset small torque so as to gradually reduce the current rotating speed until the passive regeneration of the current vehicle is finished.
In this embodiment, when the current rotational speed of engine did not reach preset high rotational speed, then control generator output presets big moment of torsion, so that current rotational speed reaches preset high rotational speed to can avoid the engine just to get into the idle state in the short time on the one hand, on the other hand then can let in more air when the carbon particle in the particle catcher is at higher temperature, improve regeneration efficiency.
And step S300, controlling a generator of the current vehicle to output a preset small torque so as to enable the current rotating speed to gradually decrease until the passive regeneration of the current vehicle is finished, wherein the preset small torque is smaller than the friction torque of the engine.
It is understood that, since the engine has friction torque (e.g. 40N · m, 45N · m, 50N · m, etc.) during operation, the engine speed will rapidly decrease under the friction torque of the engine itself after the engine is de-fueled. Thereby, the generator of the present vehicle can be controlled to output a preset small torque (e.g., 20N · m, 25N · m, 30N · m) that can be set according to the specific requirements of the present vehicle, so that the rotational speed of the engine can be prevented from dropping too fast. It is understood that the friction torque is a negative torque and the preset small torque is a positive torque. Thus, the engine speed will gradually decrease under the combined action of the negative torque value of the friction torque of the engine and the positive torque value of the preset small torque output by the generator. During this process, a large amount of air is continuously drawn into the engine and passed into the particle trap without being combusted, since the engine is in a fuel cut-off state and is in constant operation. At this time, the excess air continues to undergo a combustion reaction with the high-temperature carbon particles in the particle trap. Until the passive regeneration of the current vehicle is finished. Wherein the preset small torque is smaller than a friction torque of the engine.
In this embodiment, by controlling the generator of the current vehicle to output a preset small torque smaller than the friction torque of the engine, the current rotation speed of the engine can be gradually reduced, thereby ensuring higher regeneration efficiency and avoiding the problems of high energy consumption, noise, vibration and the like caused by maintaining the engine in a high rotation speed state all the time.
In the first embodiment of the invention, when the current vehicle meets the preset regeneration condition of the particle catcher, the engine of the current vehicle is controlled to be cut off, so that the air sucked into the engine can be introduced into the interior of the particle catcher without being combusted, and sufficient air is provided for the passive regeneration of the particle catcher. And then controlling the current rotating speed of the engine to reach a preset high rotating speed so as to prevent the engine from entering an idling state in a short time due to a small rotating speed difference between the current rotating speed of the engine and the corresponding rotating speed when the engine is in the idling state. And then controlling a generator of the current vehicle to output a preset small torque, and slowing down the speed reduction rate of the current speed of the engine to gradually reduce the current speed until the passive regeneration of the current vehicle is finished, wherein the preset small torque is smaller than the friction torque of the engine. Therefore, the embodiment ensures higher regeneration efficiency, and simultaneously avoids the problems of high energy consumption, noise, vibration and the like caused by maintaining the engine in a high-rotation-speed state all the time, and the embodiment well balances the relationship among the regeneration efficiency, the energy consumption and the user experience of passive regeneration.
Further, referring to fig. 2, a second embodiment of the present invention provides a method for controlling an extended range electric vehicle, based on the above embodiment shown in fig. 1, wherein step S200 is a step of controlling a generator of the current vehicle to output a preset small torque, and the method for controlling an extended range electric vehicle further includes:
step S210, obtaining the rotating speed reduction rate of the current rotating speed;
step S220, determining the regulating quantity of the preset small torque according to the rotating speed reduction rate;
and step S230, adjusting the preset small torque according to the adjustment amount.
There may be some difference in friction torque due to different engines or different periods of the same engine. Therefore, when the generator of the current vehicle is controlled to output the preset small torque, the current rotating speed of the engine can be acquired in real time, and the rotating speed reduction rate of the current rotating speed is calculated. Therefore, in order to avoid that the regeneration time period of the passive regeneration is too short due to too fast reduction of the rotating speed of the engine, or the energy consumption is increased due to too slow reduction, the adjusting amount of the preset small torque, namely the adjusting direction and the adjusting amplitude of the preset small torque can be determined according to the rotating speed reduction rate. And then, the preset small torque is adjusted according to the adjustment amount, so that the rotating speed reduction rate of the current rotating speed of the engine can be maintained in a more appropriate interval under the action of the adjusted preset small torque, and the situation that the regeneration time of passive regeneration is too short due to too fast reduction of the rotating speed of the engine or the energy consumption is increased due to too slow reduction of the rotating speed of the engine is avoided.
Wherein, the step S220 of determining the adjustment amount of the preset small torque according to the rotation speed reduction rate includes:
step A10, when the rotating speed reduction rate is greater than a first preset rate threshold, obtaining a first rate difference value between the rotating speed reduction rate and the first preset rate threshold;
step A11, determining a first adjustment amount of the preset small torque according to the first speed difference value so as to increase the preset small torque;
step A20, when the rotating speed reduction rate is smaller than a second preset rate threshold, obtaining a second rate difference value between the rotating speed reduction rate and the second preset rate threshold, wherein the second preset rate threshold is smaller than or equal to the first preset rate threshold;
and A21, determining a second regulating quantity of the preset small torque according to the second speed difference value so as to reduce the preset small torque.
Specifically, the first preset speed threshold is a speed value for determining whether the rotation speed of the engine is reduced too fast, and may be set according to specific requirements. The second preset speed threshold is a speed value for judging whether the rotating speed of the engine is reduced too slowly, and can be set according to specific requirements, wherein the second preset speed threshold is smaller than or equal to the first preset speed threshold.
When the rotating speed reduction rate is greater than a first preset rate threshold, which indicates that the rotating speed of the engine is reduced too fast, and the regeneration duration of the passive regeneration may be too short, a first rate difference between the rotating speed reduction rate and the first preset rate threshold may be obtained, and then a first adjustment amount of the preset small torque is determined according to the first rate difference, so as to increase the preset small torque, and thus the rotating speed reduction of the engine is slowed down. When the rotating speed reduction rate is smaller than a second preset rate threshold, which indicates that the rotating speed of the engine is reduced too slowly, and energy consumption of passive regeneration may be increased, a second rate difference between the rotating speed reduction rate and the second preset rate threshold may be obtained, and a second adjustment amount of the preset small torque is determined according to the second rate difference, so as to reduce the preset small torque, thereby reducing energy consumption. For example, a first adjustment amount corresponding to the first rate difference value may be determined by querying a preset mapping table of the rate difference value and the adjustment amount, or a second adjustment amount corresponding to the second rate difference value may be determined. In addition, the adjustment amount corresponding to the rate difference can be calculated through a preset relational expression.
In this embodiment, the preset small torque is adjusted according to the speed reduction rate of the current speed of the engine, and under the action of the adjusted preset small torque, the speed reduction rate of the current speed of the engine can be maintained in a relatively appropriate range, so that the situation that the too fast speed reduction of the engine causes too short regeneration time of passive regeneration, or the too slow speed reduction of the engine causes energy consumption increase is avoided.
Further, referring to fig. 3, a third embodiment of the present invention provides a method for controlling an extended range electric vehicle, based on the above embodiment shown in fig. 1, after the step of controlling the generator of the current vehicle to output a preset small torque in step S300, the method for controlling an extended range electric vehicle includes:
step S310, obtaining the state of a particle catcher of the current vehicle;
in step S311, when the state of the particle trap is that the passive regeneration is completed, it is determined that the current vehicle passive regeneration is finished.
In particular, the particle trap status includes completed passive regeneration and incomplete passive regeneration.
After the generator of the current vehicle is controlled to output the preset small torque so that the current rotating speed is gradually reduced, whether the passive regeneration of the particle catcher is completed or not can be determined by collecting working parameters (such as carbon loading, pressure values and the like) of the particle catcher of the current vehicle, and therefore the state of the particle catcher of the current vehicle is obtained. For example, the particle trap status is that passive regeneration has been completed when the carbon loading and/or pressure value of the particle trap of the current vehicle is below a certain corresponding preset threshold. When the carbon loading and/or the pressure value of the particle trap of the current vehicle is not lower than a certain corresponding preset low threshold value, the state of the particle trap is that passive regeneration is not completed. When the particulate trap status is that passive regeneration has been completed, then it may be determined that the current vehicle passive regeneration is complete.
Further, after the step of controlling the generator of the current vehicle to output the preset small torque in step S300, the method for controlling the extended range electric vehicle includes:
step S320, judging whether the current rotating speed of the engine is smaller than a preset idling threshold value;
step S321, if the current rotation speed is less than a preset idle speed threshold, determining that the passive regeneration of the current vehicle is finished.
Specifically, the preset idle speed threshold may be a corresponding rotation speed value when the engine of the current vehicle is in an idle speed state, and of course, the preset idle speed threshold may also be smaller than or larger than the rotation speed value. The current rotation speed of the engine can be judged whether to be smaller than a preset idling threshold value or not. If the current rotating speed is less than the preset idle speed threshold, it indicates that the rotating speed of the engine is low and the engine is about to stop at the moment, so that the air introduced into the particle trap from the engine is rare, the temperature of the carbon particles in the particle trap is gradually reduced along with the time, and at the moment, the passive regeneration cannot be continuously performed or the regeneration efficiency is extremely low, and it can be determined that the passive regeneration of the current vehicle is finished.
It is understood that, in the case that the state of the particulate trap is that the passive regeneration is completed, or the current rotation speed of the engine is less than the preset idle speed threshold, it is determined that the current vehicle passive regeneration is finished. And when the current rotating speed of the engine is not less than a preset idling threshold and the state of the particle catcher is the condition of incomplete passive regeneration, judging that the current vehicle passive regeneration is not finished.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a control system of the extended range electric vehicle according to the present invention.
The invention also provides a control system of the extended range electric automobile, which comprises the following components:
the oil cut-off control module 10 is used for controlling the oil cut-off of an engine of the current vehicle when the current vehicle meets the regeneration condition of the preset particle catcher;
the rotating speed control module 20 is used for controlling the current rotating speed of the engine to reach a preset high rotating speed;
the torque output module 30 is configured to control a generator of the current vehicle to output a preset small torque, so that the engine speed gradually decreases until the passive regeneration is finished, where the preset small torque is smaller than the friction torque of the current vehicle.
Further, the rotation speed control module 20 is further configured to:
judging whether the current rotating speed of the engine reaches a preset high rotating speed or not;
if the current rotating speed does not reach the preset high rotating speed, controlling the generator to output a preset large torque so as to enable the current rotating speed to reach the preset high rotating speed;
if the current rotating speed reaches the preset high rotating speed, executing the following steps: and controlling a generator of the current vehicle to output a preset small torque so as to gradually reduce the current rotating speed until the passive regeneration of the current vehicle is finished.
Further, the torque output module 30 is further configured to:
acquiring the rotating speed reduction rate of the current rotating speed;
determining the regulating quantity of the preset small torque according to the rotating speed reduction rate;
and adjusting the preset small torque according to the adjustment amount.
Further, the torque output module 30 is further configured to:
when the rotating speed reduction rate is larger than a first preset rate threshold, acquiring a first rate difference value between the rotating speed reduction rate and the first preset rate threshold;
determining a first adjustment amount of the preset small torque according to the first speed difference value so as to increase the preset small torque;
when the rotating speed reduction rate is smaller than a second preset rate threshold, acquiring a second rate difference value between the rotating speed reduction rate and the second preset rate threshold, wherein the second preset rate threshold is smaller than or equal to a first preset rate threshold;
and determining a second regulating quantity of the preset small torque according to the second speed difference value so as to reduce the preset small torque.
Further, the control system of the extended range electric vehicle further comprises a regeneration monitoring module, which is used for:
obtaining working parameters of a particle catcher of a current vehicle, wherein the working parameters comprise carbon capacity and pressure values;
and when the carbon loading capacity is larger than a preset carbon loading threshold value, or the pressure value is larger than a preset pressure threshold value, judging that the current vehicle meets the regeneration condition of a preset particle catcher.
Further, the regeneration monitoring module is further configured to:
obtaining a particle trap status of the current vehicle;
determining that the current vehicle passive regeneration is ended when the particulate trap status is that passive regeneration has been completed.
Further, the regeneration monitoring module is further configured to:
judging whether the current rotating speed of the engine is smaller than a preset idling threshold value or not;
and if the current rotating speed is less than a preset idling threshold, judging that the passive regeneration of the current vehicle is finished.
As shown in fig. 5, fig. 5 is a schematic device structure diagram of a hardware operating environment according to an embodiment of the present invention.
Specifically, the Control device of the extended range electric Vehicle may be a device such as a VCU (Vehicle Control Unit), a PC (Personal Computer), a tablet Computer, a portable Computer, or a server.
As shown in fig. 5, the control apparatus of the extended range electric vehicle may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WIreless-FIdelity (WI-FI) interface). The Memory 1005 may be a Random Access Memory (RAM) Memory, or may be a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001 described previously.
Those skilled in the art will appreciate that the device configuration shown in fig. 5 does not constitute a limitation of the control device of the extended range electric vehicle, and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 5, the memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and a control application program of the extended range electric vehicle.
In the device shown in fig. 5, the network interface 1004 is mainly used for connecting a backend server and communicating data with the backend server; the user interface 1003 is mainly used for connecting a client and performing data communication with the client; the processor 1001 may be configured to call the control program of the extended range electric vehicle stored in the memory 1005 to implement the operations in the control method of the extended range electric vehicle provided in the foregoing embodiments.
In addition, the embodiment of the invention also provides a vehicle, and the vehicle comprises the control equipment of the extended range electric automobile. Of course, it is understood that the vehicle further includes an energy storage device, a driving device and other devices for ensuring the normal operation of the vehicle.
In addition, an embodiment of the present invention further provides a computer storage medium, where a computer program is stored on the computer storage medium, and when the computer program is executed by a processor, the operation in the control method for an extended range electric vehicle provided in the above embodiment is implemented, and specific steps are not described herein again.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity/action/object from another entity/action/object without necessarily requiring or implying any actual such relationship or order between such entities/actions/objects; the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system 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 system. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of other like elements in a process, method, article, or system comprising the element.
For the apparatus embodiment, since it is substantially similar to the method embodiment, it is described relatively simply, and reference may be made to some descriptions of the method embodiment for relevant points. The above-described apparatus embodiments are merely illustrative, in that elements illustrated as separate components may or may not be physically separate. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of the invention. One of ordinary skill in the art can understand and implement it without inventive effort.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, a vehicle, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A control method of a range-extended electric vehicle is characterized by comprising the following steps:
controlling the engine of the current vehicle to cut off oil when the current vehicle meets the regeneration condition of the preset particle catcher;
controlling the current rotating speed of the engine to reach a preset high rotating speed;
controlling a generator of the current vehicle to output a preset small torque so as to enable the current rotating speed to gradually decrease until the passive regeneration of the current vehicle is finished, wherein the preset small torque is smaller than the friction torque of the engine.
2. The control method of the extended range electric vehicle according to claim 1, wherein the step of controlling the current rotational speed of the engine to a preset high rotational speed includes:
judging whether the current rotating speed of the engine reaches a preset high rotating speed or not;
if the current rotating speed does not reach the preset high rotating speed, controlling the generator to output a preset large torque so as to enable the current rotating speed to reach the preset high rotating speed;
if the current rotating speed reaches the preset high rotating speed, executing the following steps: and controlling a generator of the current vehicle to output a preset small torque so as to gradually reduce the current rotating speed until the passive regeneration of the current vehicle is finished.
3. The method of controlling an extended range electric vehicle of claim 1, wherein the step of controlling the generator of the present vehicle to output a preset small torque further comprises:
acquiring the rotating speed reduction rate of the current rotating speed;
determining the regulating quantity of the preset small torque according to the rotating speed reduction rate;
and adjusting the preset small torque according to the adjustment amount.
4. The method of controlling an extended range electric vehicle according to claim 3, wherein the step of determining the adjustment amount of the preset small torque based on the rotation speed reduction rate includes:
when the rotating speed reduction rate is larger than a first preset rate threshold, acquiring a first rate difference value between the rotating speed reduction rate and the first preset rate threshold;
determining a first adjustment quantity of the preset small torque according to the first speed difference value so as to increase the preset small torque;
when the rotating speed reduction rate is smaller than a second preset rate threshold, acquiring a second rate difference value between the rotating speed reduction rate and the second preset rate threshold, wherein the second preset rate threshold is smaller than or equal to a first preset rate threshold;
and determining a second regulating quantity of the preset small torque according to the second speed difference value so as to reduce the preset small torque.
5. The method of controlling an extended range electric vehicle of claim 1, wherein prior to the step of controlling the engine of the subject vehicle to be de-fueled when the subject vehicle satisfies a predetermined particulate trap regeneration condition, comprising:
obtaining working parameters of a particle catcher of a current vehicle, wherein the working parameters comprise carbon capacity and pressure values;
and when the carbon loading capacity is larger than a preset carbon loading threshold value, or the pressure value is larger than a preset pressure threshold value, judging that the current vehicle meets the regeneration condition of a preset particle catcher.
6. The control method of the extended range electric vehicle according to any one of claims 1 to 5, characterized in that, after the step of controlling the generator of the present vehicle to output a preset small torque, the method includes:
obtaining a particle trap status of the current vehicle;
determining that the current vehicle passive regeneration is ended when the particulate trap status is that passive regeneration has been completed.
7. The method of controlling an extended range electric vehicle of claim 6, wherein after the step of controlling the generator of the present vehicle to output a preset small torque, the method further comprises:
judging whether the current rotating speed of the engine is smaller than a preset idling threshold value or not;
and if the current rotating speed is less than a preset idling threshold, judging that the current vehicle passive regeneration is finished.
8. A control system of an extended range electric vehicle is characterized by comprising:
the oil cut-off control module is used for controlling the oil cut-off of an engine of the current vehicle when the current vehicle meets the regeneration condition of a preset particle catcher;
the rotating speed control module is used for controlling the current rotating speed of the engine to reach a preset high rotating speed;
the torque output module is used for controlling a generator of the current vehicle to output a preset small torque so as to enable the rotating speed of the engine to gradually decrease until the passive regeneration is finished, wherein the preset small torque is smaller than the friction torque of the current vehicle.
9. A control apparatus of an extended range electric vehicle, characterized by comprising: memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method of controlling an extended range electric vehicle according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that a control program of an extended range electric vehicle is stored thereon, which when executed by a processor, implements the steps of the control method of the extended range electric vehicle according to any one of claims 1 to 7.
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| CN202211343366.XA CN115614132B (en) | 2022-10-27 | Control method, system and equipment for extended range electric automobile and readable storage medium |
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| CN202211343366.XA CN115614132B (en) | 2022-10-27 | Control method, system and equipment for extended range electric automobile and readable storage medium |
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