CN113022549A - Hybrid electric vehicle and mode switching and gear shifting coordination control method and controller thereof - Google Patents
Hybrid electric vehicle and mode switching and gear shifting coordination control method and controller thereof Download PDFInfo
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- CN113022549A CN113022549A CN202110322149.1A CN202110322149A CN113022549A CN 113022549 A CN113022549 A CN 113022549A CN 202110322149 A CN202110322149 A CN 202110322149A CN 113022549 A CN113022549 A CN 113022549A
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- 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
- B60W20/20—Control strategies involving selection of hybrid configuration, e.g. selection between series or parallel configuration
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- 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
- B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
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- 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
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- 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
- B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
- B60W10/11—Stepped gearings
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- 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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/18—Propelling the vehicle
- B60W30/182—Selecting between different operative modes, e.g. comfort and performance modes
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- 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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/18—Propelling the vehicle
- B60W30/19—Improvement of gear change, e.g. by synchronisation or smoothing gear shift
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
Abstract
The invention relates to a hybrid electric vehicle and a mode switching and gear shifting coordination control method and a controller thereof, wherein the mode switching and gear shifting coordination control method of the hybrid electric vehicle comprises the steps of acquiring the current mode of the hybrid electric vehicle; whether a gear shifting instruction occurs is judged according to the fact that the hybrid electric vehicle is switched from the pure electric mode to the hybrid mode; controlling the motor and the gearbox to execute gear shifting operation according to the gear shifting command, and judging whether the clutch is in a separation state; the clutch is controlled to eliminate idle stroke according to the fact that the clutch is in a separation state, the clutch is controlled to keep the current position according to the fact that the clutch is not in the separation state, the engine is controlled to start or the engine is controlled to keep the starting state, the clutch is controlled to be closed after the engine is controlled to regulate the speed to a first set range, and the problems that in the prior art, when a hybrid electric vehicle is in mode switching and gear shifting coordination, the clutch is frequently combined and separated, time is consumed, the service life is short, and the comfort is poor are solved.
Description
Technical Field
The invention belongs to the technical field of automobiles, and particularly relates to a hybrid electric vehicle, a mode switching and gear shifting coordination control method and a controller thereof.
Background
This section provides background information related to the present disclosure only and is not necessarily prior art.
The hybrid electric vehicle combines an engine and a motor, is the first choice trend of the development of the automobile industry at present, and is gradually popular with users in recent years because the hybrid electric vehicle has better fuel saving property and has smaller influence on the environment compared with the traditional automobile. In the process of pure electric switching hybrid mode of a parallel system of a hybrid electric vehicle, the gear shifting requirement may not be completed in the mode switching process, or the mode switching request may occur in the gear shifting process, and if the two control requirements are not well coordinated, the problems of frequent clutch combination and separation, long-time power shortage of the vehicle, overspeed of the motor and the like may occur.
One of the processing methods in the prior art is to continue to respond to another demand after the first control demand is completely completed, for example, a mode switch must be completely completed to respond to a shift request, or a shift must be completed to begin to respond to a mode switch demand, in which the two control demands are serial in time, take a relatively long time, and easily cause a problem of motor overspeed; the other mode is that the gear shifting is preferred, the mode switching is immediately interrupted and stopped when the gear shifting request occurs in the mode switching, the gear shifting operation is executed, and the mode switching is continuously restarted after the gear shifting is completed, but in the mode, the mode switching is frequently interrupted, the mode switching action in the early stage in the gear shifting is completely stopped and recovered, so that the executing action time in the early stage is completely wasted, time is very wasted, and in a commercial vehicle with more gears, the gear-up speed of a low gear is intensive, the mode switching is frequently interrupted, the clutch is frequently combined and separated, the abrasion to parts is severe, and the service life and the comfort of a driver are influenced.
Therefore, the hybrid electric vehicle in the prior art has the problems of frequent clutch combination and separation, time consumption, short service life and poor comfort when the mode is switched and the gear is shifted in coordination.
Disclosure of Invention
The invention aims to at least solve the problems of time consumption, short service life and poor comfort caused by frequent combination and separation of a clutch when a hybrid electric vehicle is in mode switching and gear shifting coordination in the prior art. The purpose is realized by the following technical scheme:
the invention provides a hybrid electric vehicle mode switching and gear shifting coordination control method, which comprises the following steps:
acquiring a current mode of the hybrid electric vehicle;
judging whether a gear shifting instruction occurs or not according to the fact that the hybrid electric vehicle is switched from the pure electric mode to the hybrid mode;
controlling a motor and a gearbox to execute gear shifting operation according to the gear shifting instruction of the hybrid electric vehicle, and judging whether a clutch is in a separation state;
controlling the clutch to eliminate idle stroke according to the fact that the clutch is in the separation state, controlling the clutch to keep the current position according to the fact that the clutch is not in the separation state, controlling the engine to start or controlling the engine to keep the starting state, and then controlling the engine to regulate the speed to a first set range and then controlling the clutch to be closed.
According to the coordinated control method for mode switching and gear shifting of the hybrid electric vehicle provided by the embodiment of the invention, when a gear shifting instruction occurs to the hybrid electric vehicle, only the motor and the gearbox are controlled to execute the gear shifting operation, and meanwhile, the clutch is controlled to keep the current state or eliminate the idle stroke mode by judging the state of the clutch, namely, the clutch is not forced to be separated, so that frequent combined separation caused by the fact that the clutch receives the gear shifting instruction in the mode switching process is avoided, on the basis of ensuring that the clutch does not execute the forced separation action, the embodiment of the invention controls the clutch to be closed after the engine is started and the engine is controlled to regulate the speed, thereby realizing the mode switching while realizing the gear shifting operation, saving the time, and only executing the closing action in the later period and canceling the forced separation action in the gear shifting process in the prior art because the clutch only executes the holding action and the idle stroke action in the earlier period and, the service life of the clutch is prolonged, the service life of the whole hybrid electric vehicle is prolonged, the driving comfort is improved, and the problems that in the prior art, the clutch is frequently combined and separated when the mode switching and the gear shifting are coordinated, time is wasted, the service life is short, and the comfort is poor in the hybrid electric vehicle are solved.
In addition, the hybrid electric vehicle mode switching and gear shifting coordination control method provided by the embodiment of the invention can also have the following additional technical characteristics:
in some embodiments of the present invention, the controlling the electric motor and the transmission to perform a shift operation according to the shift command of the hybrid vehicle includes:
controlling the motor torque;
controlling the gear box to be disengaged;
controlling the speed regulation of the motor and the gear selection of the gearbox;
and controlling the gearbox to be in gear.
In some embodiments of the invention, the controlling the engine start or controlling the engine to remain in the start state comprises:
judging whether the engine is started;
controlling a starter to start the engine according to the condition that the engine is not started;
controlling the engine to remain in a start state in accordance with the engine having been started.
In some embodiments of the invention, said controlling said clutch to close after said controlling said engine to governed a first set range comprises: and controlling the speed difference between the engine and the motor to be equal to the required speed of the input shaft of the gearbox when the gear shifting is finished.
In some embodiments of the invention, said controlling the clutch to maintain the current position in accordance with when the clutch is not in the disengaged state comprises: and controlling the clutch to keep the current position according to the condition that the clutch is in the friction sliding state.
In some embodiments of the invention, said controlling the clutch to maintain the current position in accordance with when the clutch is not in the disengaged state comprises: and controlling the clutch to keep the current position according to the condition that the clutch is in the friction sliding state.
In some embodiments of the invention, according to the condition that no gear shifting command occurs in the hybrid electric vehicle, the engine is controlled to start or the engine is controlled to keep a starting state, and then the engine is controlled to regulate the speed to a second set range and then the clutch is controlled to be closed.
In some embodiments of the present invention, the controlling the engine to start or the engine to maintain a start state according to the absence of the shift command of the hybrid vehicle includes:
judging whether the engine is started or not;
controlling the engine to keep a starting state according to the starting of the engine;
judging whether the conditions of driving and towing are met or not according to the condition that the engine is not started;
controlling the clutch to close after eliminating idle stroke according to the condition of meeting the driving back-dragging condition so as to start the engine in a back-dragging mode;
and controlling a starter to start the engine according to the condition that the driving back-drag is not met.
In some embodiments of the invention, said controlling said engine governor to a second set range comprises: and controlling the rotating speed of the engine to be equal to the actual rotating speed of the motor.
The second aspect of the present invention provides a controller for coordinating mode switching and gear shifting of a hybrid electric vehicle, the controller comprising a control device for coordinating mode switching and gear shifting and a computer readable storage medium, the computer readable storage medium storing control instructions, the control device implementing the control method for coordinating mode switching and gear shifting according to the above embodiments by executing the control instructions, the control device comprising:
the judging module is used for acquiring the current mode of the hybrid electric vehicle and judging whether a gear shifting instruction occurs or not;
the control module is used for controlling the motor and the gearbox to execute gear shifting operation according to the gear shifting command of the hybrid electric vehicle, and meanwhile judging whether the clutch is in a separation state or not;
controlling the clutch to eliminate idle stroke according to the fact that the clutch is in the separation state, controlling the clutch to keep the current position according to the fact that the clutch is not in the separation state, controlling the engine to start or controlling the engine to keep the starting state, and then controlling the engine to regulate the speed to a first set range and then controlling the clutch to be closed.
The third aspect of the invention provides a hybrid electric vehicle, which comprises a power assembly and the controller for coordinating mode switching and gear shifting of the hybrid electric vehicle according to the embodiment.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic flow chart illustrating a method for coordinated mode switching and gear shifting of a hybrid electric vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a parallel system of a hybrid electric vehicle for executing a hybrid electric vehicle mode switching and gear shifting coordination control method according to an embodiment of the invention.
The reference symbols in the drawings denote the following:
10. a hybrid vehicle controller; 11. a shift panel;
20. a controller area network;
31. an electric power steering pump; 32. an inverter; 33. a power battery; 34. a motor controller;
40. a drive motor;
50. an electronic control unit;
60. an engine;
70. a clutch;
81. a transmission control unit; 82. a gearbox;
90. a meter.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1, an embodiment of the present invention provides a method for coordinated control of mode switching and gear shifting of a hybrid vehicle, where the method includes:
acquiring a current mode of the hybrid electric vehicle;
switching to a hybrid mode according to the fact that the hybrid electric vehicle is in a pure electric mode, and judging whether a gear shifting instruction occurs;
controlling the motor and the gearbox to execute gear shifting operation according to a gear shifting instruction of the hybrid electric vehicle, and judging whether the clutch is in a separation state;
the idle stroke of the clutch is eliminated by controlling the clutch when the clutch is in a separation state, the current position of the clutch is kept by controlling the engine to start or keeping the engine in a starting state when the clutch is not in the separation state, and then the clutch is controlled to be closed after the engine is controlled to regulate the speed to a first set range.
In the coordinated control method for mode switching and gear shifting of the hybrid electric vehicle provided by the embodiment of the invention, when a gear shifting instruction occurs in the hybrid electric vehicle, only the motor and the gearbox are controlled to execute the gear shifting operation, and simultaneously the clutch is controlled to keep the current state or eliminate the idle stroke mode by judging the state of the clutch, namely the clutch is not forced to be separated, so that frequent combined separation caused by receiving the gear shifting instruction in the mode switching process of the clutch is avoided, on the basis of ensuring that the clutch does not execute the forced separation action, the embodiment controls the clutch to be closed after the engine is started and the engine is controlled to regulate the speed, thereby realizing the mode switching while realizing the gear shifting operation, saving the time, and only executing the holding action and eliminating the idle stroke action in the early stage and only executing the closing action in the later stage and canceling the forced separation action in the gear shifting process in the prior art, the service life of the clutch is prolonged, the service life of the whole hybrid electric vehicle is prolonged, the driving comfort is improved, and the problems that in the prior art, the clutch is frequently combined and separated when the mode switching and the gear shifting are coordinated, time is wasted, the service life is short, and the comfort is poor in the hybrid electric vehicle are solved.
An embodiment of a second aspect of the present invention provides a controller for coordinating mode switching and gear shifting of a hybrid electric vehicle, the controller includes a control device for coordinating mode switching and gear shifting and a computer-readable storage medium, the computer-readable storage medium stores control instructions, the control device implements a control method for coordinating mode switching and gear shifting according to the embodiment of the first aspect by executing the control instructions, and the control device includes:
the judging module is used for acquiring the current mode of the hybrid electric vehicle and judging whether a gear shifting instruction occurs or not;
the control module is used for controlling the motor and the gearbox to execute gear shifting operation according to a gear shifting command of the hybrid electric vehicle, and meanwhile judging whether the clutch is in a separation state or not;
controlling the clutch to eliminate idle stroke according to the fact that the clutch is in a separation state, controlling the clutch to keep the current position according to the fact that the clutch is not in the separation state, controlling the engine to start or controlling the engine to keep the starting state, and then controlling the engine to regulate the speed to be within a first set range and then controlling the clutch to be closed.
It CAN be understood that the Hybrid vehicle mode switching and gear shifting coordination Control method provided by the embodiment of the present invention is executed by a Hybrid vehicle mode switching and gear shifting coordination Controller, as shown in fig. 2, specifically, the parallel system of the Hybrid vehicle includes a Hybrid Control Unit 10 (HCU), the Hybrid Control Unit 10 is configured to receive driver's operation through a gear shifting panel 11 communicatively connected thereto, so as to coordinate and Control various components and components to allow the Hybrid vehicle to run according to the driver's intention, the parallel system further includes a Controller Area Network 20 (CAN), the Hybrid Control Unit 10 and an Electronic Control Unit 50(Electronic Control Unit, ECU) in the parallel system, an inverter 32(DC/AC), a power battery 33, a motor Controller 34, a Transmission Control Unit 81 (Transmission Control Unit, TCU), the meter 90 and the like are connected through CAN signals, on the basis, an engine 60 of the hybrid electric vehicle of the electronic control unit 50 is in communication connection, the electric power steering pump 31 is electrically connected with the inverter 32, the inverter 32 is electrically connected with the power battery 33, the power battery 33 is electrically connected with the motor controller 34, and the motor controller 34 is electrically connected with the driving motor 40, specifically, through high-voltage electrical connection; the clutch 70 of the hybrid vehicle is disposed between the engine 60 and the driving motor 40, and the transmission control unit 81 is in communication with the clutch 70 and the transmission 82, respectively.
Furthermore, it should be noted that the hybrid electric vehicle has a pure electric mode and a hybrid mode, wherein the hybrid electric vehicle is driven by the motor in the pure electric mode, the engine does not participate in providing the driving torque of the whole vehicle, and the clutch is in a disengaged state in the pure electric mode; in the hybrid mode, the engine of the hybrid electric vehicle is used as a main driving source of the power of the whole vehicle, the motor is used as an auxiliary driving source of the power of the whole vehicle, and the clutch is in a closed state in the hybrid mode.
On the basis of the foregoing embodiment, the hybrid vehicle mode switching and gear shifting coordination control method provided in this embodiment first obtains a current mode of the hybrid vehicle, that is, on the basis of determining that the hybrid vehicle is currently in the electric-only mode or the hybrid mode, it is determined whether a mode switching instruction is received, it should be noted that, in this embodiment, it is described by taking an example that the hybrid vehicle receives the electric-only mode to be switched to the hybrid mode, and when it is determined that the hybrid vehicle needs to be switched from the electric-only mode to the hybrid mode, it is determined whether a gear shifting instruction occurs, that is, it is determined whether the hybrid vehicle needs to perform mode switching and gear shifting coordination control.
On the basis, if the hybrid electric vehicle has a gear shifting command, the coordinated control process of mode switching and gear shifting is entered, and if the hybrid electric vehicle has no gear shifting command, the coordinated control process of mode switching and gear shifting is entered. Specifically, if the mode switching and gear shifting coordinated control process is entered, the motor and the gearbox are controlled to execute gear shifting operation, and whether the clutch is in a separation state is judged at the same time, it needs to be explained that the clutch needs to be forcibly separated in the existing pure electric gear shifting process, but in the embodiment, the state of the clutch needs to be judged first, and if the clutch is in the separation state, the clutch is controlled to rapidly eliminate idle stroke, so that understandably, only the clutch is controlled to rapidly eliminate the idle stroke, the influence of the forced separation on the clutch cannot be generated, and the service life of the clutch is prolonged; and if the clutch is not in the separation state, controlling the clutch to keep the current position unchanged. Specifically, in some embodiments of the present invention, the condition that the clutch is not in the disengaged state includes: the clutch is in a friction state, namely when the clutch is in the friction state, the clutch is controlled to keep the current position, and forced separation is not carried out, so that the problems of time consumption and influence on the service life of the clutch caused by forced separation are avoided.
Further, while the clutch state is judged, the electric motor and the gearbox need to be controlled to perform a gear shifting operation in the embodiment, and it can be understood that when a mode switching command and a gear shifting command occur simultaneously, the coordinated control method provided by the embodiment normally performs the actions related to the electric motor and the gearbox, and performs the mode switching control request on the clutch and the engine by judging the current states of the clutch and the engine. Specifically, in this embodiment, the operation of shifting gears by the motor and the transmission sequentially includes controlling the torque of the motor to be clear, controlling the transmission to be disengaged, controlling the speed of the motor to be adjusted, selecting the gear of the transmission, and controlling the transmission to be engaged, so as to complete the command of shifting gears.
On the basis of the above embodiment, after the clutch is controlled to maintain the current position or the idle stroke is eliminated, the engine is controlled to operate, specifically, the engine is controlled to start or the engine is controlled to maintain a starting state, then the engine is controlled to regulate the speed to a first set range and then the clutch is controlled to close, so as to complete a mode switching instruction, wherein the state of the engine needs to be judged first when the engine is controlled to operate, specifically, in some embodiments of the present invention, controlling the engine to start or controlling the engine to maintain the starting state includes judging whether the engine has been started, and when the engine is not started, the engine is controlled to start by the starter; when the engine is started, the engine is controlled to keep a starting state, namely the engine needs to be started, and if the state of the engine is an un-started state, the engine is started by using a starter.
Further, after the engine is started, the engine is throttled to control the engine to throttle to a first set range, and in some embodiments of the present invention, controlling the engine to throttle to the first set range includes: and controlling the speed difference between the engine and the motor to be equal to the required speed of the input shaft of the gearbox when the gear shifting is finished. That is, when the mode switching command and the shift command are executed simultaneously, the governor of the engine is targeted for the input shaft required rotation speed of the transmission at the time of completion of the shift, i.e., the speed difference between the engine and the motor is made equal to the input shaft required rotation speed of the transmission at the time of completion of the shift.
In some embodiments of the present invention, the required input shaft speed of the transmission at the time of completion of the gear shift may be set in advance by calculation, specifically, the required input shaft speed of the transmission at the time of completion of the gear shift is equal to the output shaft speed of the transmission multiplied by the speed ratio of the required gear, and for example, in some embodiments of the present invention, the required input shaft speed of the transmission at the time of completion of the gear shift may be set to 50rpm, that is, the speed difference between the engine and the motor may be set to 50 rpm.
On the basis of the foregoing embodiment, after the hybrid vehicle mode switching and gear shifting coordination control method provided in this embodiment acquires the current mode of the hybrid vehicle, if it is found that the gear shifting instruction is not received, and only the mode switching instruction is received, only the mode switching is executed.
Specifically, the engine is controlled to start or the engine is controlled to keep a starting state, and then the engine is controlled to regulate the speed to a second set range and then the clutch is controlled to be closed. In some embodiments of the present invention, the engine is controlled to start or maintain the starting state by determining the state of the engine, that is, determining whether the engine is started first, and when the engine is started, controlling the engine to maintain the starting state; when the engine is not started, the engine is controlled to be started, and the engine can be started in a driving and dragging mode or can be started by using a starter.
On the basis of the embodiment, whether the driving back-dragging condition is met or not can be judged according to relevant logics, namely whether the engine can be started through driving back-dragging or not, and when the driving back-dragging condition is met, the clutch is controlled to quickly eliminate idle stroke and slowly close the clutch, so that the engine is started through back-dragging; and when the driving back-dragging condition is not met, starting the engine by using the starter.
Further, after the engine is started, the engine is throttled to control the engine to throttle to a second set range, and in some embodiments of the present invention, controlling the engine to throttle to the second set range includes: the rotation speed of the engine and the rotation speed of the motor are controlled to be equal, that is, when only the mode switching command is executed, the speed regulation target of the engine is the rotation speed of the motor.
An embodiment of a third aspect of the invention provides a hybrid vehicle comprising a powertrain and a hybrid vehicle mode-switching and gear-shifting coordinated controller according to an embodiment of the second aspect.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A mode switching and gear shifting coordinated control method for a hybrid electric vehicle is characterized by comprising the following steps:
acquiring a current mode of the hybrid electric vehicle;
judging whether a gear shifting instruction occurs or not according to the fact that the hybrid electric vehicle is switched from the pure electric mode to the hybrid mode;
controlling a motor and a gearbox to execute gear shifting operation according to the gear shifting instruction of the hybrid electric vehicle, and judging whether a clutch is in a separation state;
controlling the clutch to eliminate idle stroke according to the fact that the clutch is in the separation state, controlling the clutch to keep the current position according to the fact that the clutch is not in the separation state, controlling the engine to start or controlling the engine to keep the starting state, and then controlling the engine to regulate the speed to a first set range and then controlling the clutch to be closed.
2. The hybrid vehicle mode switching and gear shifting coordinated control method according to claim 1, wherein the controlling an electric motor and a gearbox to perform gear shifting operation according to the occurrence of the gear shifting command of the hybrid vehicle comprises:
controlling the motor torque;
controlling the gear box to be disengaged;
controlling the speed regulation of the motor and the gear selection of the gearbox;
and controlling the gearbox to be in gear.
3. The hybrid vehicle mode-switching and gear-shifting coordination control method according to claim 1, characterized in that the controlling the engine to start or the controlling the engine to maintain a start state comprises:
judging whether the engine is started;
controlling a starter to start the engine according to the condition that the engine is not started;
controlling the engine to remain in a start state in accordance with the engine having been started.
4. The hybrid vehicle mode switching and gear shifting coordinated control method according to any one of claims 1-3, characterized in that the controlling the clutch to close after the engine is controlled to be throttled to a first set range comprises: and controlling the speed difference between the engine and the motor to be equal to the required speed of the input shaft of the gearbox when the gear shifting is finished.
5. The hybrid vehicle mode-switching and gear-shifting coordination control method according to claim 1, characterized in that said controlling the clutch to maintain a current position in accordance with the clutch not being in the disengaged state includes: and controlling the clutch to keep the current position according to the condition that the clutch is in the friction sliding state.
6. The hybrid electric vehicle mode switching and gear shifting coordination control method according to claim 1, characterized in that according to a gear shifting command of the hybrid electric vehicle, the engine is controlled to start or the engine is controlled to keep a starting state, and then the engine is controlled to regulate the speed to a second set range and then the clutch is controlled to be closed.
7. The hybrid vehicle mode switching and gear shifting coordinated control method according to claim 6, wherein the controlling the engine to start or the engine to maintain a start state according to the absence of a gear shifting command of the hybrid vehicle comprises:
judging whether the engine is started or not;
controlling the engine to keep a starting state according to the starting of the engine;
judging whether the conditions of driving and towing are met or not according to the condition that the engine is not started;
controlling the clutch to close after eliminating idle stroke according to the condition of meeting the driving back-dragging condition so as to start the engine in a back-dragging mode;
and controlling a starter to start the engine according to the condition that the driving back-drag is not met.
8. The hybrid vehicle mode-switching and gear-shifting coordinated control method according to claim 7, wherein said controlling the engine governor to a second setting range includes: and controlling the rotating speed of the engine to be equal to the actual rotating speed of the motor.
9. A controller for coordinating mode switching and gear shifting of a hybrid vehicle, comprising a control device for coordinating mode switching and gear shifting and a computer readable storage medium, wherein the computer readable storage medium stores control instructions, the control device implements the method for coordinating mode switching and gear shifting of a hybrid vehicle according to any one of claims 1 to 8 by executing the control instructions, the control device comprises:
the judging module is used for acquiring the current mode of the hybrid electric vehicle and judging whether a gear shifting instruction occurs or not;
the control module is used for controlling the motor and the gearbox to execute gear shifting operation according to the gear shifting command of the hybrid electric vehicle, and meanwhile judging whether the clutch is in a separation state or not;
controlling the clutch to eliminate idle stroke according to the fact that the clutch is in the separation state, controlling the clutch to keep the current position according to the fact that the clutch is not in the separation state, controlling the engine to start or controlling the engine to keep the starting state, and then controlling the engine to regulate the speed to a first set range and then controlling the clutch to be closed.
10. A hybrid vehicle comprising a powertrain and a hybrid vehicle mode-shift and shift coordinated controller according to claim 9.
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