CN110645349B - Double-clutch gear shifting control method, device and equipment for hybrid vehicle - Google Patents
Double-clutch gear shifting control method, device and equipment for hybrid vehicle Download PDFInfo
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- CN110645349B CN110645349B CN201910842994.4A CN201910842994A CN110645349B CN 110645349 B CN110645349 B CN 110645349B CN 201910842994 A CN201910842994 A CN 201910842994A CN 110645349 B CN110645349 B CN 110645349B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/04—Smoothing ratio shift
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
Abstract
The invention relates to a double-clutch gear shifting control method, a double-clutch gear shifting control device and double-clutch gear shifting control equipment of a hybrid vehicle, wherein the method comprises the following steps: when the rotating speed difference is smaller than a first preset rotating speed difference value, and meanwhile, the rotating speed change rate is smaller than a preset rotating speed change rate; controlling the first clutch torque to decrease the first predetermined torque value at a predetermined torque change rate; in the process of maintaining the torque of the first clutch equal to the first preset torque value, detecting whether the rotation speed difference is smaller than a second preset rotation speed difference; controlling the second clutch torque to rise to a second preset torque value; when the rotation speed difference is smaller than a second preset rotation speed difference value, controlling the torque of the second clutch to be reduced to a first preset torque value; maintaining the second clutch torque equal to the first preset torque value, and controlling the first clutch torque to rise to a third preset torque value; and increasing the torque of the first clutch to a third preset torque value, and controlling the rotation speed difference to be equal to a second preset rotation speed difference value. The invention can ensure the smoothness of gear shifting, reduce the pause and the frustration and improve the comfort level of the automobile.
Description
Technical Field
The invention relates to the technical field of vehicle gear shifting, in particular to a double-clutch gear shifting control method, a double-clutch gear shifting control device and double-clutch gear shifting control equipment for a hybrid vehicle.
Background
Along with the development of economy, the automobile industry develops faster and faster, more consumers select the automobile as a first travel tool, the holding quantity of the automobile is increased day by day, the requirement of the consumers on the comfort of the driving and riding of the automobile is higher and higher,
when the automobile is a hybrid power system integrating a BSG motor, an engine and a DCT, in the driving process of the automobile, after the SOC of a BSG 48V battery pack is lower than a current set threshold value, energy recovery is required to be carried out in the driving process of the automobile so as to ensure that the SOC of the 48V battery pack is not in a low level state; meanwhile, when a driver steps on a large accelerator and suddenly releases the accelerator after accelerating in driving a vehicle, according to a driving gear shifting strategy of the automatic transmission, sliding gear-up gear shifting is triggered, and the purpose of the gear shifting process is to reduce the rotating speed of an engine to a proper high gear, so that NVH (noise, vibration and harshness) noise and the like of the high rotating speed of the engine are avoided;
when the two situations occur simultaneously, the traditional gear shifting control method of the double-clutch automatic transmission cannot solve the problems of impact and pause caused by the synchronous stage of the engine rotating speed and the input shaft rotating speed in the sliding upshift, and the driving quality feeling of a vehicle is influenced;
in order to solve the above problems, a reasonable dual clutch shift control process is a problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present invention is to provide a method, an apparatus, and a device for controlling a dual clutch shift of a hybrid vehicle, which control a torque of a first clutch and a torque of a second clutch to ensure that an engine speed smoothly enters a target gear speed, ensure a smooth shift, reduce jerk, and improve a comfort level of an automobile.
In order to solve the above problems, the present invention provides a dual clutch shift control method for a hybrid vehicle, which is used when a coasting shift is started in an energy recovery process of the hybrid vehicle, and comprises:
acquiring a rotation speed difference of an engine and a rotation speed change rate of the engine;
when the rotating speed difference is smaller than a first preset rotating speed difference value and the rotating speed change rate is smaller than a preset rotating speed change rate, acquiring the current first clutch torque;
controlling the first clutch torque to decrease a first preset torque value at a preset torque change rate;
in the process of maintaining the first clutch torque equal to the first preset torque value, detecting whether the rotation speed difference is smaller than a second preset rotation speed difference or not, and acquiring the current second clutch torque;
controlling the second clutch torque to rise to a second preset torque value;
when the rotation speed difference is smaller than the second preset rotation speed difference value, controlling the second clutch torque to be reduced to the first preset torque value;
maintaining the second clutch torque equal to the first preset torque value, and controlling the first clutch torque to rise to a third preset torque value;
and when the first clutch torque is increased to the third preset torque value, controlling the rotation speed difference to be equal to the second preset rotation speed difference value.
Further, the acquiring of the rotation speed difference of the engine and the rotation speed change rate of the engine includes:
acquiring the current rotating speed of the engine and a preset rotating speed value of the engine;
determining the rotation speed difference according to the current rotation speed and the preset rotation speed value;
and determining the rotating speed change rate according to the rotating speed difference and the preset rotating speed value.
Further, the first preset clutch torque value range is 0Nm-5 Nm.
Further, the second preset rotation speed difference is 0 rpm.
Further, controlling the second clutch torque to increase to a second predetermined torque value is accomplished by controlling a rate of change of the second clutch torque.
Further, controlling the first clutch torque to increase to a third predetermined torque value is accomplished by controlling a rate of change of the first clutch torque.
Further, the process of controlling the first clutch torque to rise to a third preset torque value forms a stepwise rise by changing a rate of change of the first clutch torque.
The invention also provides a double clutch gear shifting control device of a hybrid vehicle, which comprises the following components:
a first acquisition unit configured to acquire a rotation speed difference of the engine and a rotation speed change rate of the engine;
the second obtaining unit is used for obtaining the current first clutch torque when the rotating speed difference is smaller than a first preset rotating speed difference value and the rotating speed change rate is smaller than a preset rotating speed change rate;
a first executing unit for controlling the first clutch torque to reduce a first preset torque value at a preset torque change rate;
the second execution unit is used for detecting whether the rotation speed difference is smaller than a second preset rotation speed difference or not in the process of maintaining the first clutch torque to be equal to the first preset torque value, and acquiring the current second clutch torque;
a third execution unit for controlling the second clutch torque to rise to a second preset torque value;
the fourth execution unit is used for controlling the second clutch torque to be reduced to the first preset torque value when the rotation speed difference is smaller than the second preset rotation speed difference;
a fifth execution unit configured to control the first clutch torque to increase to a third preset torque value while maintaining the second clutch torque equal to the first preset torque value;
and the sixth execution unit is used for controlling the rotating speed difference to be equal to the second preset rotating speed difference value when the first clutch torque is increased to the third preset torque value.
Further, the first acquisition unit includes:
the information acquisition module is used for acquiring the current rotating speed of the engine and the preset rotating speed value of the engine;
the first determining module is used for determining the rotation speed difference according to the current rotation speed and the preset rotation speed value;
and the second determining module is used for determining the rotating speed change rate according to the rotating speed difference and the preset rotating speed value.
The present invention also protects a dual clutch shift control device for a hybrid vehicle, comprising: the system comprises an information acquisition device, an engine controller, a clutch controller and a transmission controller;
the information acquisition device is used for acquiring the rotating speed difference of the engine and the rotating speed change rate of the engine;
the information acquisition device is used for acquiring the current first clutch torque when the rotating speed difference is smaller than a first preset rotating speed difference value and the rotating speed change rate is smaller than a preset rotating speed change rate;
the transmission controller for controlling the first clutch torque to decrease a first preset torque value at a preset torque change rate;
the clutch controller is used for acquiring a current second clutch torque in the process of maintaining the first clutch torque equal to the first preset torque value;
the engine controller is used for detecting whether the speed difference is smaller than a second preset speed difference or not in the process of maintaining the first clutch torque to be equal to the first preset torque value;
the clutch controller is used for controlling the second clutch torque to rise to a second preset torque value;
the clutch controller is used for controlling the second clutch torque to be reduced to the first preset torque value when the rotation speed difference is smaller than a second preset rotation speed difference value;
the clutch controller unit is used for controlling the first clutch torque to rise to a third preset torque value while maintaining the second clutch torque equal to the first preset torque value;
the engine controller is configured to control the rotational speed difference to be equal to the second preset rotational speed difference when the first clutch torque increases to the third preset torque value.
Due to the technical scheme, the invention has the following beneficial effects:
1) according to the double-clutch gear shifting control method, the double-clutch gear shifting control device and the double-clutch gear shifting control equipment for the hybrid vehicle, the rotating speed of an engine is guaranteed to smoothly enter the target gear rotating speed by controlling the first clutch torque and the second clutch torque, the smoothness of gear shifting is guaranteed, the pause and the pause are reduced, and the comfort level of an automobile is improved.
2) According to the double-clutch gear shifting control method, the double-clutch gear shifting control device and the double-clutch gear shifting control equipment for the hybrid vehicle, the torque of the clutch is prevented from being controlled singly by controlling the torque of the first clutch and the torque of the second clutch, the abrasion of the clutch can be reduced, the service life is prolonged, and the maintenance cost is reduced.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a flow chart of a dual clutch shift control method for a hybrid vehicle provided in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a dual clutch shift control device for a hybrid vehicle according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a first obtaining unit according to an embodiment of the present invention
Fig. 4 is a schematic structural diagram of a second execution unit according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.
Example one
The embodiment provides a double-clutch gear shifting control method, device and equipment of a hybrid vehicle.
As shown in fig. 1, the double clutch shift control method for the hybrid vehicle is adopted when a coasting shift is started in the energy recovery process of the hybrid vehicle, and comprises the following steps:
s101, obtaining the rotating speed difference of an engine and the rotating speed change rate of the engine;
s102, when the rotating speed difference is smaller than a first preset rotating speed difference value and the rotating speed change rate is smaller than a preset rotating speed change rate, acquiring the current first clutch torque;
s103, controlling the torque of the first clutch to reduce a first preset torque value at a preset torque change rate;
s104, in the process of maintaining the first clutch torque equal to the first preset torque value, detecting whether the rotation speed difference is smaller than a second preset rotation speed difference or not, and acquiring the current second clutch torque;
s105, controlling the torque of the second clutch to rise to a second preset torque value;
s106, when the rotation speed difference is smaller than the second preset rotation speed difference value, controlling the torque of the second clutch to be reduced to the first preset torque value;
s107, maintaining the torque of the second clutch to be equal to the first preset torque value, and controlling the torque of the first clutch to be increased to a third preset torque value;
and S108, when the torque of the first clutch is increased to the third preset torque value, controlling the rotation speed difference to be equal to the second preset rotation speed difference value.
Specifically, in the hybrid vehicle energy recovery process, when starting coasting shift, the hybrid vehicle energy recovery process comprises the following steps:
when a gear shifting request is received, acquiring the current electric quantity load of a vehicle battery pack;
when the current electric quantity load is smaller than a preset electric quantity threshold value, starting an energy recovery process;
in the starting energy recovery process, obtaining the current driving condition of the vehicle;
and when the current driving working condition is a sliding working condition, performing sliding gear shifting according to the gear shifting request.
Preferably, the acquiring of the rotation speed difference of the engine and the rotation speed change rate of the engine includes:
acquiring the current rotating speed of the engine and a preset rotating speed value of the engine;
determining the rotation speed difference according to the current rotation speed and the preset rotation speed value;
and determining the rotating speed change rate according to the rotating speed difference and the preset rotating speed value.
Further, the rotation speed difference is a difference value between the current rotation speed and the preset rotation speed value.
Preferably, the first preset clutch torque value is 0 Nm.
Preferably, the second preset rotational speed difference is 0 rpm.
Further, controlling the second clutch torque to increase to a second predetermined torque value is accomplished by controlling a rate of change of the second clutch torque.
Further, controlling the first clutch torque to increase to a third predetermined torque value is accomplished by controlling a rate of change of the first clutch torque.
Further, the process of controlling the first clutch torque to rise to a third preset torque value forms a stepwise rise by changing a rate of change of the first clutch torque.
As shown in fig. 2, the twin clutch shift control device for a hybrid vehicle includes:
a first acquisition unit 200 for acquiring a rotation speed difference of the engine and a rotation speed change rate of the engine;
a second obtaining unit 300, configured to obtain a current first clutch torque when the rotation speed difference is smaller than a first preset rotation speed difference value and the rotation speed change rate is smaller than a preset rotation speed change rate;
a first executing unit 400 for controlling the first clutch torque to decrease a first preset torque value at a preset torque change rate;
the second executing unit 500 is configured to detect whether the rotational speed difference is smaller than a second preset rotational speed difference in the process of maintaining the first clutch torque equal to the first preset torque value, and obtain a current second clutch torque;
a third execution unit 600 for controlling the second clutch torque to increase to a second preset torque value;
a fourth executing unit 700, configured to control the second clutch torque to decrease to the first preset torque value when the rotation speed difference is smaller than the second preset rotation speed difference;
a fifth executing unit 800, configured to control the first clutch torque to increase to a third preset torque value while maintaining the second clutch torque equal to the first preset torque value;
a sixth executing unit 900, configured to control the rotational speed difference to be equal to the second preset rotational speed difference when the first clutch torque increases to the third preset torque value.
As shown in fig. 3, the first obtaining unit 200 includes:
the information acquisition module 201 is used for acquiring the current rotating speed of the engine and a preset rotating speed value of the engine;
a first determining module 202, configured to determine the rotational speed difference according to the current rotational speed and the preset rotational speed value;
the second determining module 203 is configured to determine the rotation speed change rate according to the rotation speed difference and the preset rotation speed value.
As shown in FIG. 4, the second execution unit 500 includes
A detecting module 501, configured to detect whether the rotational speed difference is smaller than a second preset rotational speed difference;
a third obtaining module 502 for obtaining a current second clutch torque;
specifically, the device is based on the double-clutch gear shifting control method of the hybrid vehicle, and can ensure that the rotating speed of the engine smoothly enters the target gear rotating speed by controlling the first clutch torque and the second clutch torque, ensure the smoothness of gear shifting, reduce pause and contusion and improve the comfort level of the automobile.
The double clutch shift control apparatus of a hybrid vehicle includes: the system comprises an information acquisition device, an engine controller, a clutch controller and a transmission controller;
the information acquisition device is used for acquiring the rotating speed difference of the engine and the rotating speed change rate of the engine;
the information acquisition device is used for acquiring the current first clutch torque when the rotating speed difference is smaller than a first preset rotating speed difference value and the rotating speed change rate is smaller than a preset rotating speed change rate;
the transmission controller for controlling the first clutch torque to decrease a first preset torque value at a preset torque change rate;
the clutch controller is used for acquiring a current second clutch torque in the process of maintaining the first clutch torque equal to the first preset torque value;
the engine controller is used for detecting whether the speed difference is smaller than a second preset speed difference or not in the process of maintaining the first clutch torque to be equal to the first preset torque value;
the clutch controller is used for controlling the second clutch torque to rise to a second preset torque value;
the clutch controller is used for controlling the second clutch torque to be reduced to the first preset torque value when the rotation speed difference is smaller than a second preset rotation speed difference value;
the clutch controller unit is used for controlling the first clutch torque to rise to a third preset torque value while maintaining the second clutch torque equal to the first preset torque value;
the engine controller is configured to control the rotational speed difference to be equal to the second preset rotational speed difference when the first clutch torque increases to the third preset torque value.
Specifically, equipment adopts the aforesaid double clutch shift control device can guarantee that the engine speed smoothly gets into the target gear rotational speed through controlling first clutch moment of torsion and second clutch moment of torsion, guarantees the ride comfort of shifting, reduces and frustrates, improves the comfort level of car, avoids single control clutch moment of torsion simultaneously, can reduce the wearing and tearing of clutch, improves life, reduces cost of maintenance.
The embodiment provides a double-clutch gear shifting control method, device and equipment for a hybrid vehicle, which can ensure that the rotating speed of an engine smoothly enters a target gear rotating speed by controlling the torque of a first clutch and the torque of a second clutch, ensure the smoothness of gear shifting, reduce pause and pause, improve the comfort level of an automobile, avoid singly controlling the torque of the clutches, reduce the abrasion of the clutches, prolong the service life and reduce the maintenance cost.
Example two
The second embodiment provides a double-clutch gear shifting control method, device and equipment for a hybrid vehicle.
Specifically, the double-clutch gear shifting control method for the hybrid vehicle is adopted when coasting gear shifting is started in the energy recovery process of the hybrid vehicle, and comprises the following steps:
s101, obtaining the rotating speed difference of an engine and the rotating speed change rate of the engine;
s102, when the rotating speed difference is smaller than a first preset rotating speed difference value and the rotating speed change rate is smaller than a preset rotating speed change rate, acquiring the current first clutch torque;
s103, controlling the torque of the first clutch to reduce a first preset torque value at a preset torque change rate;
s104, in the process of maintaining the first clutch torque equal to the first preset torque value, detecting whether the rotation speed difference is smaller than a second preset rotation speed difference or not, and acquiring the current second clutch torque;
s105, controlling the torque of the second clutch to rise to a second preset torque value;
s106, when the rotation speed difference is smaller than the second preset rotation speed difference value, controlling the torque of the second clutch to be reduced to the first preset torque value;
s107, maintaining the torque of the second clutch to be equal to the first preset torque value, and controlling the torque of the first clutch to be increased to a third preset torque value;
and S108, when the torque of the first clutch is increased to the third preset torque value, controlling the rotation speed difference to be equal to the second preset rotation speed difference value.
Specifically, in the hybrid vehicle energy recovery process, when starting coasting shift, the hybrid vehicle energy recovery process comprises the following steps:
when a gear shifting request is received, acquiring the current electric quantity load of a vehicle battery pack;
when the current electric quantity load is smaller than a preset electric quantity threshold value, starting an energy recovery process;
in the starting energy recovery process, obtaining the current driving condition of the vehicle;
and when the current driving working condition is a sliding working condition, performing sliding gear shifting according to the gear shifting request.
Preferably, the acquiring of the rotation speed difference of the engine and the rotation speed change rate of the engine includes:
acquiring the current rotating speed of the engine and a preset rotating speed value of the engine;
determining the rotation speed difference according to the current rotation speed and the preset rotation speed value;
and determining the rotating speed change rate according to the rotating speed difference and the preset rotating speed value.
Further, the rotation speed difference is a difference value between the current rotation speed and the preset rotation speed value.
Preferably, the first preset clutch torque value is 5 Nm.
Preferably, the second preset rotational speed difference is 0 rpm.
Further, controlling the second clutch torque to increase to a second predetermined torque value is accomplished by controlling a rate of change of the second clutch torque.
Further, controlling the first clutch torque to increase to a third predetermined torque value is accomplished by controlling a rate of change of the first clutch torque.
Further, the process of controlling the first clutch torque to rise to a third preset torque value forms a stepwise rise by changing a rate of change of the first clutch torque.
Concretely, the double clutch gear shifting control device of the hybrid vehicle comprises:
a first acquisition unit 200 for acquiring a rotation speed difference of the engine and a rotation speed change rate of the engine;
a second obtaining unit 300, configured to obtain a current first clutch torque when the rotation speed difference is smaller than a first preset rotation speed difference value and the rotation speed change rate is smaller than a preset rotation speed change rate;
a first executing unit 400 for controlling the first clutch torque to decrease a first preset torque value at a preset torque change rate;
the second executing unit 500 is configured to detect whether the rotational speed difference is smaller than a second preset rotational speed difference in the process of maintaining the first clutch torque equal to the first preset torque value, and obtain a current second clutch torque;
a third execution unit 600 for controlling the second clutch torque to increase to a second preset torque value;
a fourth executing unit 700, configured to control the second clutch torque to decrease to the first preset torque value when the rotation speed difference is smaller than the second preset rotation speed difference;
a fifth executing unit 800, configured to control the first clutch torque to increase to a third preset torque value while maintaining the second clutch torque equal to the first preset torque value;
a sixth executing unit 900, configured to control the rotational speed difference to be equal to the second preset rotational speed difference when the first clutch torque increases to the third preset torque value.
Specifically, the first obtaining unit 200 includes:
the information acquisition module 201 is used for acquiring the current rotating speed of the engine and a preset rotating speed value of the engine;
a first determining module 202, configured to determine the rotational speed difference according to the current rotational speed and the preset rotational speed value;
the second determining module 203 is configured to determine the rotation speed change rate according to the rotation speed difference and the preset rotation speed value.
Specifically, the second execution unit 500 includes
A detecting module 501, configured to detect whether the rotational speed difference is smaller than a second preset rotational speed difference;
a third obtaining module 502 for obtaining a current second clutch torque;
specifically, the device is based on the double-clutch gear shifting control method of the hybrid vehicle, and can ensure that the rotating speed of the engine smoothly enters the target gear rotating speed by controlling the first clutch torque and the second clutch torque, ensure the smoothness of gear shifting, reduce pause and contusion and improve the comfort level of the automobile.
The double clutch shift control apparatus of a hybrid vehicle includes: the system comprises an information acquisition device, an engine controller, a clutch controller and a transmission controller;
the information acquisition device is used for acquiring the rotating speed difference of the engine and the rotating speed change rate of the engine;
the information acquisition device is used for acquiring the current first clutch torque when the rotating speed difference is smaller than a first preset rotating speed difference value and the rotating speed change rate is smaller than a preset rotating speed change rate;
the transmission controller for controlling the first clutch torque to decrease a first preset torque value at a preset torque change rate;
the clutch controller is used for acquiring a current second clutch torque in the process of maintaining the first clutch torque equal to the first preset torque value;
the engine controller is used for detecting whether the speed difference is smaller than a second preset speed difference or not in the process of maintaining the first clutch torque to be equal to the first preset torque value;
the clutch controller is used for controlling the second clutch torque to rise to a second preset torque value;
the clutch controller is used for controlling the second clutch torque to be reduced to the first preset torque value when the rotation speed difference is smaller than a second preset rotation speed difference value;
the clutch controller unit is used for controlling the first clutch torque to rise to a third preset torque value while maintaining the second clutch torque equal to the first preset torque value;
the engine controller is configured to control the rotational speed difference to be equal to the second preset rotational speed difference when the first clutch torque increases to the third preset torque value.
Specifically, equipment adopts the aforesaid double clutch shift control device can guarantee that the engine speed smoothly gets into the target gear rotational speed through controlling first clutch moment of torsion and second clutch moment of torsion, guarantees the ride comfort of shifting, reduces and frustrates, improves the comfort level of car, avoids single control clutch moment of torsion simultaneously, can reduce the wearing and tearing of clutch, improves life, reduces cost of maintenance.
The difference between the second embodiment and the first embodiment is that the first preset clutch torque value is large, the gear shifting process can be completed in advance, time and oil consumption are saved, the first clutch torque and the second clutch torque can be controlled, the rotating speed of the engine can be guaranteed to smoothly enter the target gear rotating speed, the gear shifting smoothness is guaranteed, pause and pause are reduced, the comfort level of an automobile is improved, the single control clutch torque is avoided, the abrasion of the clutch can be reduced, the service life is prolonged, and the maintenance cost is reduced.
It should be noted that, for the sake of simplicity, the foregoing method embodiments are described as two series of acts, but those skilled in the art should understand that the present invention is not limited by the described order of acts, as some steps may be performed in other orders or simultaneously according to the present invention. Similarly, the modules of the dual clutch shift control device of the hybrid vehicle are referred to as computer programs or program segments for performing one or more specific functions, and the distinction between the modules does not necessarily mean that the actual program code is divided. Further, the above embodiments may be arbitrarily combined to obtain other embodiments.
In the foregoing embodiments, the descriptions of the embodiments have respective emphasis, and reference may be made to related descriptions of other embodiments for parts that are not described in detail in a certain embodiment. Those of skill in the art will further appreciate that the various illustrative logical blocks, units, and steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate the interchangeability of hardware and software, various illustrative components, elements, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design requirements of the overall system.
Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present embodiments.
The foregoing description has disclosed fully preferred embodiments of the present invention. It should be noted that those skilled in the art can make modifications to the embodiments of the present invention without departing from the scope of the appended claims.
Accordingly, the scope of the appended claims is not to be limited to the specific embodiments described above.
Claims (10)
1. A double clutch gear shifting control method of a hybrid vehicle is adopted when a coasting gear shifting is started in the energy recovery process of the hybrid vehicle, and is characterized by comprising the following steps of:
acquiring a rotation speed difference of an engine and a rotation speed change rate of the engine;
when the rotating speed difference is smaller than a first preset rotating speed difference value and the rotating speed change rate is smaller than a preset rotating speed change rate, acquiring the current first clutch torque;
controlling the first clutch torque to decrease to a first preset torque value at a preset torque change rate;
in the process of maintaining the first clutch torque equal to the first preset torque value, detecting whether the rotation speed difference is smaller than a second preset rotation speed difference or not, and acquiring the current second clutch torque;
controlling the second clutch torque to rise to a second preset torque value;
when the rotation speed difference is smaller than the second preset rotation speed difference value, controlling the second clutch torque to be reduced to the first preset torque value;
maintaining the second clutch torque equal to the first preset torque value, and controlling the first clutch torque to rise to a third preset torque value;
and when the first clutch torque is increased to the third preset torque value, controlling the rotation speed difference to be equal to the second preset rotation speed difference value.
2. The double clutch shift control method of a hybrid vehicle according to claim 1, wherein the acquiring of the rotation speed difference of the engine and the rotation speed change rate of the engine includes:
acquiring the current rotating speed of the engine and a preset rotating speed value of the engine;
determining the rotation speed difference according to the current rotation speed and the preset rotation speed value;
and determining the rotating speed change rate according to the rotating speed difference and the preset rotating speed value.
3. The twin clutch shift control method of a hybrid vehicle according to claim 1, wherein the first preset clutch torque value ranges from 0Nm to 5 Nm.
4. The twin clutch shift control method of a hybrid vehicle according to claim 1, wherein the second preset rotational speed difference is 0 rpm.
5. The dual clutch shift control method for a hybrid vehicle as set forth in claim 1, wherein controlling the second clutch torque to increase to a second predetermined torque value is accomplished by controlling a rate of change of the second clutch torque.
6. The dual clutch shift control method for a hybrid vehicle as set forth in claim 1, wherein controlling the first clutch torque to increase to a third predetermined torque value is accomplished by controlling a rate of change of the first clutch torque.
7. The dual clutch shift control method of a hybrid vehicle according to claim 6, wherein controlling the first clutch torque to rise to a third preset torque value is performed in a stepwise-up manner by changing a rate of change of the first clutch torque.
8. A dual clutch shift control device for a hybrid vehicle, comprising:
a first acquisition unit configured to acquire a rotation speed difference of the engine and a rotation speed change rate of the engine;
the second obtaining unit is used for obtaining the current first clutch torque when the rotating speed difference is smaller than a first preset rotating speed difference value and the rotating speed change rate is smaller than a preset rotating speed change rate;
the first execution unit is used for controlling the first clutch torque to be reduced to a first preset torque value at a preset torque change rate;
the second execution unit is used for detecting whether the rotation speed difference is smaller than a second preset rotation speed difference or not in the process of maintaining the first clutch torque to be equal to the first preset torque value, and acquiring the current second clutch torque;
a third execution unit for controlling the second clutch torque to rise to a second preset torque value;
the fourth execution unit is used for controlling the second clutch torque to be reduced to the first preset torque value when the rotation speed difference is smaller than the second preset rotation speed difference;
a fifth execution unit configured to control the first clutch torque to increase to a third preset torque value while maintaining the second clutch torque equal to the first preset torque value;
and the sixth execution unit is used for controlling the rotating speed difference to be equal to the second preset rotating speed difference value when the first clutch torque is increased to the third preset torque value.
9. The twin clutch shift control device of a hybrid vehicle according to claim 8, wherein the first acquisition unit includes:
the information acquisition module is used for acquiring the current rotating speed of the engine and the preset rotating speed value of the engine;
the first determining module is used for determining the rotation speed difference according to the current rotation speed and the preset rotation speed value;
and the second determining module is used for determining the rotating speed change rate according to the rotating speed difference and the preset rotating speed value.
10. A dual clutch shift control apparatus of a hybrid vehicle, characterized by comprising: the system comprises an information acquisition device, an engine controller, a clutch controller and a transmission controller;
the information acquisition device is used for acquiring the rotating speed difference of the engine and the rotating speed change rate of the engine;
the information acquisition device is used for acquiring the current first clutch torque when the rotating speed difference is smaller than a first preset rotating speed difference value and the rotating speed change rate is smaller than a preset rotating speed change rate;
the transmission controller is configured to control the first clutch torque to decrease to a first predetermined torque value at a predetermined torque rate of change;
the clutch controller is used for acquiring a current second clutch torque in the process of maintaining the first clutch torque equal to the first preset torque value;
the engine controller is used for detecting whether the rotation speed difference is smaller than a second preset rotation speed difference or not in the process of maintaining the first clutch torque to be equal to the first preset torque value;
the clutch controller is used for controlling the second clutch torque to rise to a second preset torque value;
the clutch controller is used for controlling the second clutch torque to be reduced to the first preset torque value when the rotation speed difference is smaller than the second preset rotation speed difference;
the clutch controller is used for controlling the first clutch torque to rise to a third preset torque value while maintaining the second clutch torque equal to the first preset torque value;
the engine controller is configured to control the rotational speed difference to be equal to the second preset rotational speed difference when the first clutch torque increases to the third preset torque value.
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| CN114838120A (en) * | 2020-12-04 | 2022-08-02 | 浙江吉利控股集团有限公司 | Clutch starting control method and system of hybrid power system and vehicle |
| CN113386769B (en) * | 2021-07-22 | 2022-10-25 | 蜂巢传动系统(江苏)有限公司保定研发分公司 | Energy recovery control method and device for hybrid electric vehicle and vehicle |
| CN113503359B (en) * | 2021-07-22 | 2023-01-06 | 重庆长安汽车股份有限公司 | Clutch torque control method and system of PHEV (hybrid electric vehicle) type double-clutch automatic transmission |
| CN113883266B (en) * | 2021-09-30 | 2023-04-07 | 重庆青山工业有限责任公司 | Rotational speed control method for DCT (Dual Clutch Transmission) upshifting process |
| CN115045928B (en) * | 2022-06-14 | 2024-03-26 | 中国第一汽车股份有限公司 | Clutch torque transmission abnormality detection method and device, medium and electronic equipment |
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