CN114347980B - Method and device for switching vehicle running modes and automobile - Google Patents
Method and device for switching vehicle running modes and automobile Download PDFInfo
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- CN114347980B CN114347980B CN202011091594.3A CN202011091594A CN114347980B CN 114347980 B CN114347980 B CN 114347980B CN 202011091594 A CN202011091594 A CN 202011091594A CN 114347980 B CN114347980 B CN 114347980B
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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
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Abstract
The invention provides a method and a device for switching a vehicle running mode and an automobile, and relates to the field of automobile control. The method comprises the following steps: receiving a hybrid power mode request, and judging whether the rotation speed difference at two ends of the synchronizer exceeds a calibration value; acquiring a current running mode of the vehicle, and requesting a transmission control unit to perform clutch control according to the current running mode of the vehicle so as to reduce the rotation speed difference; and when the detected rotation speed difference is smaller than or equal to the calibration value, sending a hybrid power mode switching instruction to a transmission control unit so as to enable the vehicle to run in the hybrid power mode. The invention achieves the aim of switching the hybrid power mode without reducing the vehicle speed at a higher speed of the vehicle. The driving performance is improved, the experience of the user is improved, and the practical value is high.
Description
Technical Field
The present invention relates to the field of automobile control, and in particular, to a method and an apparatus for switching a vehicle running mode, and an automobile.
Background
Different from fuel vehicles and pure electric vehicles, hybrid electric vehicles are provided with traditional power systems such as engines, transmissions and the like of the fuel vehicles, and electric driving systems composed of power batteries, driving motors and the like. The current operation modes of hybrid vehicles can be divided into: an electric-only mode of operation driven solely by the electric-only powertrain; the pure electric power system is used for driving operation, and meanwhile, the engine only generates electricity and does not directly participate in a series mode of driving operation; and a hybrid mode in which the engine directly performs drive operation. Because of the diversity of the operation modes and the difference of the working characteristics of different power systems, the hybrid electric vehicle can realize the optimal power performance and economical efficiency of the whole vehicle through the switching of the operation modes.
In general, the engine has poor economy in the low speed section, so the hybrid electric vehicle generally uses a pure electric mode in the starting and low speed sections. And when the vehicle speed is increased to a certain interval, the driver does not need strong power, the requirement of an engine operation economy area is just met, the operation mode of the automobile is switched from a pure electric mode or a series mode to a hybrid power mode, and the improvement of the economy of the whole automobile is realized through the mode switching.
However, when the running mode of the automobile needs to be switched from the pure electric mode or the series mode to the hybrid power mode, if the current speed is higher, the automobile cannot be switched, and the automobile needs to be switched to the hybrid power mode only by reducing the speed to a certain degree, so that the drivability of the automobile is affected, and bad experience is brought to a user.
Disclosure of Invention
The invention provides a method and a device for switching a vehicle running mode and an automobile, and solves the problem that the hybrid power mode can be switched only by reducing the speed when the current speed is higher.
To solve the above technical problem, a first aspect of an embodiment of the present invention provides a method for switching a vehicle operation mode, including:
receiving a hybrid power mode request, wherein the hybrid power mode request is used for requesting a vehicle to enter a hybrid power mode to operate;
judging whether the rotation speed difference at two ends of the synchronizer exceeds a calibration value or not;
under the condition that the rotating speed difference exceeds the calibration value, acquiring a current running mode of the vehicle, and requesting a transmission control unit to perform clutch control according to the current running mode of the vehicle so as to reduce the rotating speed difference;
and when the rotation speed difference is detected to be smaller than or equal to the calibration value, sending a hybrid mode switching instruction to the transmission control unit so as to enable the vehicle to run in a hybrid mode.
Optionally, determining whether the rotational speed difference between two ends of the synchronizer exceeds a calibration value includes:
acquiring the wheel rotation speed, and determining the rear end rotation speed of the synchronizer according to the wheel rotation speed;
acquiring the rotating speed of an input end of a speed changer, and determining the rotating speed of the front end of the synchronizer according to the rotating speed of the input end of the speed changer;
and obtaining the rotation speed difference according to the rear end rotation speed and the front end rotation speed, and further judging whether the rotation speed difference exceeds the calibration value.
Optionally, according to the current running mode of the vehicle, requesting the transmission control unit to perform clutch control, including:
in case the current operation mode is a series mode, the steps are performed: requesting a transmission control unit to perform clutch control; or alternatively
Under the condition that the current running mode is a pure electric mode, a serial mode switching instruction is sent to the engine control unit;
receiving feedback information, and executing the steps of: and requesting the transmission control unit to perform clutch control, wherein the feedback information is sent after the engine control unit successfully executes the serial mode switching instruction.
Optionally, requesting the transmission control unit to perform clutch control to reduce the rotation speed difference includes:
the transmission control unit controls the clutch to perform a sliding operation so as to pull up the rotating speed of the input end of the transmission and further reduce the rotating speed difference.
Optionally, after determining whether the rotational speed difference across the synchronizer exceeds the calibration value, the method further includes:
and in the case that the rotation speed difference is judged not to exceed the calibration value, sending the hybrid mode switching instruction to the transmission control unit so that the vehicle runs in a hybrid mode.
A second aspect of an embodiment of the present invention provides an apparatus for switching a vehicle operation mode, the apparatus including:
the receiving request module is used for receiving a hybrid power mode request, wherein the hybrid power mode request is used for requesting the vehicle to enter a hybrid power mode to operate;
the rotating speed difference judging module is used for judging whether the rotating speed difference at two ends of the synchronizer exceeds a calibration value;
the mode control module is used for acquiring a current running mode of the vehicle under the condition that the rotating speed difference exceeds the calibration value, and requesting the transmission control unit to perform clutch control according to the current running mode of the vehicle so as to reduce the rotating speed difference;
and the first transmission switching instruction module is used for transmitting a hybrid power mode switching instruction to the transmission control unit when the rotation speed difference is detected to be smaller than or equal to the calibration value so as to enable the vehicle to run in the hybrid power mode.
Optionally, the rotation speed difference judging module includes:
the rear end rotating speed determining unit is used for obtaining the rotating speed of the wheel and determining the rear end rotating speed of the synchronizer according to the rotating speed of the wheel;
the front-end rotating speed determining unit is used for obtaining the rotating speed of the input end of the speed changer and determining the front-end rotating speed of the synchronizer according to the rotating speed of the input end of the speed changer;
and the rotating speed difference judging unit is used for obtaining the rotating speed difference according to the rear end rotating speed and the front end rotating speed, and further judging whether the rotating speed difference exceeds the calibration value.
Optionally, the mode control module is specifically configured to:
in case the current operation mode is a series mode, the steps are performed: requesting a transmission control unit to perform clutch control; or alternatively
Under the condition that the current running mode is a pure electric mode, a serial mode switching instruction is sent to the engine control unit;
receiving feedback information, and executing the steps of: and requesting the transmission control unit to perform clutch control, wherein the feedback information is sent after the engine control unit successfully executes the serial mode switching instruction.
Optionally, the apparatus further comprises:
and the second transmission switching instruction module is used for transmitting the hybrid power mode switching instruction to the transmission control unit so as to enable the vehicle to run in the hybrid power mode under the condition that the rotating speed difference is judged not to exceed the standard value.
A third aspect of an embodiment of the present invention provides an automobile, including: a vehicle controller;
the whole vehicle controller executes the method for switching the vehicle operation modes according to any one of the above.
According to the method for switching the vehicle running mode, after the hybrid power mode request is received, whether the rotation speed difference at two ends of the synchronizer exceeds the calibration value is judged, if yes, the transmission control unit is requested to control the clutch so as to reduce the rotation speed difference at two ends of the synchronizer, and as one end of the synchronizer reflects the rotation speed corresponding to the vehicle speed and the other end reflects the rotation speed corresponding to the engine, the rotation speed difference at two ends is reduced through the clutch, the rotation speed requirement range of the normal gear of the synchronizer is reached under the condition that the vehicle speed is not reduced, and the aim of switching the hybrid power mode from the current running mode to the hybrid power mode is achieved, namely the aim that the vehicle speed is not required to be reduced under the condition that the vehicle speed is higher is achieved. The driving performance is improved, the experience of the user is improved, and the practical value is high.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method of vehicle operation mode switching according to an embodiment of the present invention;
FIG. 2 is a flow chart of a vehicle operation mode switching step in an embodiment of the present invention;
fig. 3 is a block diagram of an apparatus for switching a vehicle operation mode according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The inventor finds that when the running mode of the hybrid electric vehicle needs to be switched from the pure electric mode or the series mode to the hybrid mode at present, if the current vehicle speed is higher, the switching cannot be performed, and the vehicle speed needs to be reduced to a certain degree to be switched to the hybrid mode.
The inventors have further studied and found that the cause of the above problems is:
at present, a Vehicle Control Unit (VCU) judges an optimal running mode of a vehicle according to the power demand of a driver for driving the vehicle and the state of the vehicle (factors such as the speed of the vehicle, the electric quantity of a power storage battery and the like), and in a pure electric mode and a series mode, an engine and a transmission are not directly involved in the driving of the vehicle, and the vehicle is only driven to run by a driving motor. Whereas in hybrid mode, the engine transmits power directly to the wheels through the transmission. Therefore, when switching to the hybrid mode under the electric-only mode or series mode operation conditions, operations such as synchronizer gear engagement and clutch engagement of the transmission are required.
In the gear engaging process of the synchronizer, a certain limit requirement is provided for the rotation speed difference at two ends of the synchronizer, the rotation speed of the rear end of the synchronizer reflects the rotation speed corresponding to the vehicle speed, and the rotation speed of the front end of the synchronizer reflects the rotation speed of the engine output to the input end of the transmission.
If the automobile is in a pure electric mode or a series mode, the clutch is in an open state, the rotation speed of the output of the engine is not transmitted to the input end of the transmission, the front end rotation speed of the synchronizer is 0, if the speed of the automobile is higher, the rear end rotation speed of the synchronizer is also higher, the rotation speed difference at the two ends of the synchronizer is overlarge and exceeds a standard value, the requirement of the gear shift of the synchronizer cannot be met, and the hybrid power mode cannot be switched.
In view of the above problems, the inventors have conducted extensive research, calculation, simulation and field testing, creatively propose a method for switching the vehicle operation modes, and the following describes and illustrates the technical scheme of the invention in detail.
Fig. 1 shows a flowchart of a method for switching a vehicle operation mode according to an embodiment of the present invention. The method comprises the following steps:
step 101: a hybrid mode request is received, the hybrid mode request requesting that the vehicle enter a hybrid mode of operation.
In the embodiment of the invention, the technical scheme is provided for the situation that the speed difference at two ends of the synchronizer cannot meet the requirement of gear advance but needs to enter a hybrid power mode when the vehicle is in a pure electric mode or a series mode currently and the vehicle speed is higher.
In general, if the vehicle whole capacity management system determines that the vehicle currently has the best operation mode to be the hybrid mode, a hybrid mode request is sent to the whole vehicle controller (VCU or HCU) for requesting the vehicle to enter the hybrid mode operation.
Step 102: and judging whether the rotation speed difference at two ends of the synchronizer exceeds a calibration value.
In the embodiment of the invention, after receiving a hybrid power mode request, the whole vehicle controller firstly judges whether the rotation speed difference at two ends of the synchronizer exceeds a calibration value. The calibration value is a classical value obtained by a large number of tests and calculation, and when the rotation speed difference at two ends of the synchronizer does not exceed the calibration value, the synchronizer is considered to meet the rotation speed requirement of normal gear shifting, and gear shifting can be performed; and if the rotation speed difference at the two ends of the synchronizer exceeds the calibration value, the synchronizer is considered to not meet the rotation speed requirement of normal gear shifting, and the gear shifting can not be performed.
The specific steps for judging whether the rotation speed difference at two ends of the synchronizer exceeds a calibration value comprise the following steps:
step S1: acquiring the wheel rotation speed, and determining the rear end rotation speed of the synchronizer according to the wheel rotation speed;
step S2: acquiring the rotating speed of the input end of the speed changer, and determining the rotating speed of the front end of the synchronizer according to the rotating speed of the input end of the speed changer;
in the embodiment of the invention, the whole vehicle controller obtains the wheel rotation speed, the rotation speed of the output end of the speed changer can be obtained by calculating according to the wheel rotation speed, and the rotation speed of the rear end of the synchronizer can be determined by the rotation speed of the output end; the whole vehicle controller obtains the input end rotating speed of the speed changer, and the front end rotating speed of the synchronizer can be determined through the input end rotating speed.
In general, when the vehicle runs in the pure electric mode, the clutch is in an open state, the engine does not work, the engine speed does not exist naturally, the input end of the transmission does not have the speed, namely the front end of the synchronizer does not have the speed; when the vehicle is operated in the series mode, the clutch is still in an open state, and the engine is operated (the engine generates electricity), but the rotational speed of the engine is not transmitted to the input of the transmission, so the input of the transmission is still free of rotational speed, i.e., the front end of the synchronizer is not free of rotational speed.
In either case, however, the vehicle is running and there is a rotational speed of the wheels that reflects the rotational speed at the output of the transmission, i.e., the rotational speed at the rear end of the synchronizer.
Step S3: and obtaining a rotation speed difference according to the rear end rotation speed and the front end rotation speed, and further judging whether the rotation speed difference exceeds a calibration value.
In the embodiment of the invention, after the rear end rotating speed and the front end rotating speed of the synchronizer are determined, the whole vehicle controller can calculate the rotating speed difference between the rear end rotating speed and the front end rotating speed according to the rear end rotating speed and the front end rotating speed, compare the rotating speed difference with the calibration value and judge whether the rotating speed difference exceeds the calibration value. For example, the calibration value is 2000, the vehicle controller determines whether the value of the rotational speed difference between the rear end rotational speed of the synchronizer and the front end rotational speed of the synchronizer exceeds 2000, so as to determine the subsequent steps.
It should be noted that, the process of determining the front end rotation speed and the rear end rotation speed of the synchronizer by the vehicle controller may be performed before the hybrid mode request is received, and in actual situations, the process of determining the front end rotation speed and the rear end rotation speed of the synchronizer by the vehicle controller may be performed at any time as the rotation speed of the transmission input end and the rotation speed of the transmission output end are also required during the vehicle operation control by the vehicle controller. The step of determining whether the rotational speed difference across the synchronizer exceeds a calibrated value is performed after receiving the hybrid mode request.
Step 103: and under the condition that the rotation speed difference exceeds a calibration value, acquiring a current running mode of the vehicle, and requesting the transmission control unit to perform clutch control according to the current running mode of the vehicle so as to reduce the rotation speed difference.
In the embodiment of the invention, if the whole vehicle controller judges that the rotation speed difference exceeds the calibration value, the current running mode of the wheels is obtained, and then the transmission control unit is requested to carry out clutch control according to the specific condition of the current running mode so as to achieve the aim of reducing the rotation speed difference. The method comprises the following specific steps of:
step T1: in case the current operation mode is a series mode, the steps are performed: the transmission control unit is requested to perform clutch control.
In the embodiment of the present invention, if the vehicle is currently running in the series mode, that is, the engine generates power to charge the battery system, the engine is essentially in a working state, and in this case, the whole vehicle controller may directly execute the steps of: the transmission control unit is requested to perform clutch control.
Step V1: under the condition that the current running mode is a pure electric mode, a serial mode switching instruction is sent to the engine control unit;
step V2: receiving feedback information, and executing the steps of: and requesting the transmission control unit to perform clutch control, wherein the feedback information is sent after the engine control unit successfully executes the serial mode switching instruction.
In the embodiment of the invention, if the vehicle is currently running in the electric-only mode, that is, the engine is essentially in a non-working state, in this case, the whole vehicle controller needs to start the engine and is in a working state, therefore, the whole vehicle controller needs to send a serial mode switching instruction to an engine control unit (EMS), the engine is started after the engine control unit successfully executes the serial mode switching instruction and is in the working state, then the engine control unit sends a feedback message to the whole vehicle controller, and after the whole vehicle controller receives the feedback message, the steps are executed: the transmission control unit is requested to perform clutch control.
In the embodiment of the invention, the method for requesting the transmission control unit to control the clutch so as to reduce the rotation speed difference specifically comprises the following steps:
the transmission control unit controls the clutch to carry out the sliding operation, the sliding operation of the clutch can pull the rotating speed of the input end of the Gao Biansu device, the rotating speed of the input end of the transmission is pulled up, the difference value between the rotating speed of the input end of the transmission and the rotating speed of the output end of the transmission is reduced, and the rotating speed difference of the two ends of the synchronizer is naturally reduced.
Step 104: and when the detected rotation speed difference is smaller than or equal to the calibration value, sending a hybrid power mode switching instruction to a transmission control unit so as to enable the vehicle to run in the hybrid power mode.
In the embodiment of the invention, the clutch slipping operation reduces the rotation speed difference at two ends of the synchronizer, and the rotation speed difference gradually reduces below a calibration value, for example: the value of the rotational speed difference between the rear end rotational speed of the synchronizer and the front end rotational speed of the synchronizer is reduced to below 2000.
When the rotation speed difference is detected to be smaller than or equal to the calibration value, the whole vehicle controller can send a hybrid power mode switching instruction to the transmission control unit, after the transmission control unit receives the hybrid power mode switching instruction, the instruction is executed, and as the rotation speed difference at two ends of the synchronizer reaches the rotation speed requirement of normal gear shifting, the synchronizer finishes gear shifting, so that the vehicle is switched from a pure electric mode or a series mode to a hybrid power mode, and the vehicle runs in the hybrid power mode.
In the above process, if it is determined that the rotational speed difference between the two ends of the synchronizer does not exceed the calibration value, the whole vehicle controller does not need to request the transmission control unit to perform clutch control no matter whether the vehicle is currently operated in the electric-only mode or in the series mode, but directly sends a hybrid power mode switching instruction to the transmission control unit, after receiving the hybrid power mode switching instruction, the transmission control unit executes the instruction, and the synchronizer completes gear shifting, so that the vehicle is switched from the electric-only mode or the series mode to the hybrid power mode, and the vehicle is operated in the hybrid power mode.
Referring to fig. 2, a flowchart illustrating a step of switching a vehicle operation mode in an embodiment of the present invention is shown, where a specific flow includes:
the whole vehicle controller is electrified to perform various self-tests, so that the automobile is ensured to be in a state capable of operating normally. In general, the hybrid electric vehicle will run in the pure electric mode in the starting stage, which is of course determined by combining various factors such as actual vehicle conditions, and after the vehicle is started, the current running mode and the rotational speeds of the input end and the output end of the transmission may be acquired and determined simultaneously or at different times. The rotation speed of the output end of the speed changer can be obtained by calculation according to the speed information, and the rotation speed of the input end of the speed changer can be obtained in other modes, and after the rotation speed of the input end and the rotation speed of the output end of the speed changer are determined, the whole vehicle controller can determine the rotation speed difference of the two ends of the synchronizer.
After the whole vehicle controller obtains the current running mode, if the current running mode is the pure electric mode or the serial mode, the current running mode is kept continuously, the whole vehicle energy management system determines the running mode of the vehicle, determines whether the vehicle needs to enter the hybrid power mode for running, when the vehicle needs to enter the hybrid power mode, the whole vehicle controller determines the rotating speed difference at two ends of the synchronizer according to the rotating speed of the input end and the rotating speed of the output end of the transmission, and if the calibration value is 3000, the magnitude relation between the numerical value of the rotating speed difference at two ends of the synchronizer and 3000 is judged.
If the value of the rotation speed difference at two ends of the synchronizer is smaller than 3000, the whole vehicle controller directly sends a hybrid power mode switching instruction to a Transmission Control Unit (TCU), namely, the TCU receives the hybrid power mode switching instruction and then executes the instruction. Of course, it is understood that if the vehicle does not enter the hybrid mode due to other factors, the step of sending the hybrid mode switch command to the TCU is repeated.
If the value of the rotation speed difference at two ends of the synchronizer is greater than 3000, the current operation mode is needed: the pure electric mode or the series mode adopts different methods: in the series mode, the whole vehicle controller directly requests the TCU to perform clutch control; in the pure electric mode, the vehicle controller needs to send a serial mode switching instruction to an engine control unit (EMS), the EMS receives the instruction and then executes the instruction, namely, starts the engine to work, at the moment, the vehicle enters the serial mode to operate, and then the vehicle controller requests the TCU to perform clutch control. The TCU controls the clutch to carry out the sliding control, the clutch sliding control can improve the rotating speed of the input end of the speed changer so as to reduce the rotating speed difference of the two ends of the synchronizer until the rotating speed difference of the two ends of the synchronizer is reduced to less than 3000, and then the vehicle can enter the hybrid power mode to operate according to the same flow.
The embodiment of the invention also provides a device for switching the running mode of the vehicle, referring to fig. 3, a block diagram of the device for switching the running mode of the vehicle is shown, and the device comprises:
a receive request module 310 for receiving a hybrid mode request requesting that the vehicle enter a hybrid mode of operation;
the rotation speed difference judging module 320 is configured to judge whether the rotation speed difference between two ends of the synchronizer exceeds a calibration value;
a mode control module 330, configured to obtain a current running mode of the vehicle when the rotation speed difference exceeds the calibration value, and request the transmission control unit to perform clutch control according to the current running mode of the vehicle so as to reduce the rotation speed difference;
and a first transmission switching instruction module 340, configured to send a hybrid mode switching instruction to the transmission control unit when the rotation speed difference is detected to be less than or equal to the calibration value, so that the vehicle operates in a hybrid mode.
Optionally, the rotational speed difference determining module 320 includes:
the rear end rotating speed determining unit is used for obtaining the rotating speed of the wheel and determining the rear end rotating speed of the synchronizer according to the rotating speed of the wheel;
the front-end rotating speed determining unit is used for obtaining the rotating speed of the input end of the speed changer and determining the front-end rotating speed of the synchronizer according to the rotating speed of the input end of the speed changer;
and the rotating speed difference judging unit is used for obtaining the rotating speed difference according to the rear end rotating speed and the front end rotating speed, and further judging whether the rotating speed difference exceeds the calibration value.
Optionally, the mode control module 330 is specifically configured to:
in case the current operation mode is a series mode, the steps are performed: requesting a transmission control unit to perform clutch control; or alternatively
Under the condition that the current running mode is a pure electric mode, a serial mode switching instruction is sent to the engine control unit;
receiving feedback information, and executing the steps of: and requesting the transmission control unit to perform clutch control, wherein the feedback information is sent after the engine control unit successfully executes the serial mode switching instruction.
Optionally, the apparatus further comprises:
and the second transmission switching instruction module is used for transmitting the hybrid power mode switching instruction to the transmission control unit so as to enable the vehicle to run in the hybrid power mode under the condition that the rotating speed difference is judged not to exceed the standard value.
The embodiment of the invention also provides an automobile, which comprises: a vehicle controller; the vehicle controller executes the method for switching the vehicle operation modes in any one of the steps 101 to 104.
Through the above embodiment, in the method for switching the vehicle running mode according to the embodiment of the present invention, after receiving the hybrid power mode request, it is first determined whether the rotational speed difference between the two ends of the synchronizer exceeds the calibration value, and the rotational speed difference between the two ends of the synchronizer is determined according to the rotational speed of the transmission input end and the rotational speed of the transmission output end. If the rotational speed difference at the two ends of the synchronizer exceeds the calibration value, the transmission control unit is requested to control the clutch sliding operation, the rotational speed of the input end of the transmission can be increased by the clutch sliding operation, the difference between the rotational speed of the output end of the transmission and the rotational speed of the output end of the transmission is reduced, and therefore the rotational speed difference at the two ends of the synchronizer is reduced.
Because one end of the synchronizer reflects the rotating speed corresponding to the vehicle speed and the other end reflects the rotating speed corresponding to the engine, the rotating speed difference at two ends is reduced through the clutch sliding operation, the rotating speed requirement range of the normal gear entering of the synchronizer is reached under the condition that the vehicle speed is not reduced, and the aim of switching the current running mode to the hybrid power mode is fulfilled, namely the aim of switching the hybrid power mode without reducing the vehicle speed under the condition that the vehicle speed is higher is fulfilled. The steering automatic correcting method has the advantages that the driving performance is improved, the experience of a user is improved, the practical value is high, and the practical value is high.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.
Claims (6)
1. A method of vehicle operation mode switching, the method comprising:
receiving a hybrid power mode request, wherein the hybrid power mode request is used for requesting a vehicle to enter a hybrid power mode to operate;
acquiring the wheel rotation speed, and determining the rear end rotation speed of the synchronizer according to the wheel rotation speed;
acquiring the rotating speed of an input end of a speed changer, and determining the rotating speed of the front end of the synchronizer according to the rotating speed of the input end of the speed changer;
obtaining a rotation speed difference according to the rear end rotation speed and the front end rotation speed, and further judging whether the rotation speed difference exceeds a calibration value;
under the condition that the rotating speed difference exceeds the calibration value, acquiring a current running mode of the vehicle, and requesting a transmission control unit to perform clutch control according to the current running mode of the vehicle so as to reduce the rotating speed difference;
when the rotation speed difference is detected to be smaller than or equal to the calibration value, a hybrid mode switching instruction is sent to the transmission control unit so that the vehicle runs in a hybrid mode;
wherein, according to the current running mode of the vehicle, the transmission control unit is requested to perform clutch control, comprising:
in case the current operation mode is a series mode, the steps are performed: requesting a transmission control unit to perform clutch control; or under the condition that the current operation mode is the pure electric mode, transmitting a serial mode switching instruction to the engine control unit; receiving feedback information, and executing the steps of: and requesting the transmission control unit to perform clutch control, wherein the feedback information is sent after the engine control unit successfully executes the serial mode switching instruction.
2. The method of claim 1, wherein requesting a transmission control unit for clutch control to reduce the rotational speed difference comprises:
the transmission control unit controls the clutch to perform a sliding operation so as to pull up the rotating speed of the input end of the transmission and further reduce the rotating speed difference.
3. The method of claim 1, wherein after determining whether the difference in rotational speed across the synchronizer has exceeded the calibrated value, the method further comprises:
and in the case that the rotation speed difference is judged not to exceed the calibration value, sending the hybrid mode switching instruction to the transmission control unit so that the vehicle runs in a hybrid mode.
4. An apparatus for switching modes of operation of a vehicle, the apparatus comprising:
the receiving request module is used for receiving a hybrid power mode request, wherein the hybrid power mode request is used for requesting the vehicle to enter a hybrid power mode to operate;
the rotational speed difference judging module comprises:
the rear end rotating speed determining unit is used for obtaining the rotating speed of the wheel and determining the rear end rotating speed of the synchronizer according to the rotating speed of the wheel;
the front-end rotating speed determining unit is used for obtaining the rotating speed of the input end of the speed changer and determining the front-end rotating speed of the synchronizer according to the rotating speed of the input end of the speed changer;
the rotating speed difference judging unit is used for obtaining the rotating speed difference according to the rear end rotating speed and the front end rotating speed, and further judging whether the rotating speed difference exceeds a calibration value;
the mode control module is used for acquiring a current running mode of the vehicle under the condition that the rotating speed difference exceeds the calibration value, and requesting the transmission control unit to perform clutch control according to the current running mode of the vehicle so as to reduce the rotating speed difference;
a first transmission switching instruction module configured to transmit a hybrid mode switching instruction to the transmission control unit when the rotation speed difference is detected to be less than or equal to the calibration value, so that the vehicle is operated in a hybrid mode;
the mode control module is specifically configured to:
in case the current operation mode is a series mode, the steps are performed: requesting a transmission control unit to perform clutch control; or alternatively
Under the condition that the current operation mode is a pure electric mode, a serial mode switching instruction is sent to an engine control unit; receiving feedback information, and executing the steps of: and requesting the transmission control unit to perform clutch control, wherein the feedback information is sent after the engine control unit successfully executes the serial mode switching instruction.
5. The apparatus of claim 4, wherein the apparatus further comprises:
and the second transmission switching instruction module is used for transmitting the hybrid power mode switching instruction to the transmission control unit so as to enable the vehicle to run in the hybrid power mode under the condition that the rotating speed difference is judged not to exceed the standard value.
6. An automobile, the automobile comprising: a vehicle controller;
the vehicle controller executes the method for switching the vehicle operation modes according to any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011091594.3A CN114347980B (en) | 2020-10-13 | 2020-10-13 | Method and device for switching vehicle running modes and automobile |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006315484A (en) * | 2005-05-11 | 2006-11-24 | Nissan Motor Co Ltd | Mode changeover controller for hybrid driving device for vehicle |
| CN104670221A (en) * | 2015-03-06 | 2015-06-03 | 奇瑞汽车股份有限公司 | Hybrid electric vehicle work mode switching process dynamic coordination control method |
| CN104842992A (en) * | 2014-12-19 | 2015-08-19 | 北汽福田汽车股份有限公司 | Vehicle working mode switching method and system of hybrid electric vehicle and transmission control unit |
| CN105438170A (en) * | 2015-12-25 | 2016-03-30 | 北京新能源汽车股份有限公司 | Coordinated control method and system for gear switching and working mode switching and vehicle |
| CN106553639A (en) * | 2015-09-17 | 2017-04-05 | 北汽福田汽车股份有限公司 | Hybrid vehicle and control method and system |
| DE102015224077A1 (en) * | 2015-12-02 | 2017-06-08 | Borgward Trademark Holdings Gmbh | Hybrid electric vehicle, method and system for its regulation |
| CN111098847A (en) * | 2018-10-25 | 2020-05-05 | 比亚迪股份有限公司 | Control method and system for series-connection switching and series-parallel connection mode and vehicle |
-
2020
- 2020-10-13 CN CN202011091594.3A patent/CN114347980B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006315484A (en) * | 2005-05-11 | 2006-11-24 | Nissan Motor Co Ltd | Mode changeover controller for hybrid driving device for vehicle |
| CN104842992A (en) * | 2014-12-19 | 2015-08-19 | 北汽福田汽车股份有限公司 | Vehicle working mode switching method and system of hybrid electric vehicle and transmission control unit |
| CN104670221A (en) * | 2015-03-06 | 2015-06-03 | 奇瑞汽车股份有限公司 | Hybrid electric vehicle work mode switching process dynamic coordination control method |
| CN106553639A (en) * | 2015-09-17 | 2017-04-05 | 北汽福田汽车股份有限公司 | Hybrid vehicle and control method and system |
| DE102015224077A1 (en) * | 2015-12-02 | 2017-06-08 | Borgward Trademark Holdings Gmbh | Hybrid electric vehicle, method and system for its regulation |
| CN105438170A (en) * | 2015-12-25 | 2016-03-30 | 北京新能源汽车股份有限公司 | Coordinated control method and system for gear switching and working mode switching and vehicle |
| CN111098847A (en) * | 2018-10-25 | 2020-05-05 | 比亚迪股份有限公司 | Control method and system for series-connection switching and series-parallel connection mode and vehicle |
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