CN110103941B - Method, system and terminal for protecting dual-mass flywheel in hybrid vehicle - Google Patents
Method, system and terminal for protecting dual-mass flywheel in hybrid vehicle Download PDFInfo
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- CN110103941B CN110103941B CN201910312579.8A CN201910312579A CN110103941B CN 110103941 B CN110103941 B CN 110103941B CN 201910312579 A CN201910312579 A CN 201910312579A CN 110103941 B CN110103941 B CN 110103941B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/20—Reducing vibrations in the driveline
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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Abstract
The invention discloses a method, a system and a terminal for protecting a dual-mass flywheel in a hybrid vehicle, wherein the method comprises the following steps: when the engine is flamed out, judging whether a starting instruction is received or not; if yes, executing the starting instruction; judging whether the starting instruction is a clutch starting instruction or not; if yes, judging whether an emergency braking instruction is received within a preset time range after the starting instruction is executed; if so, judging whether the rotating speed of the clutch dragging shaft is within a first preset rotating speed range; if so, fuel supply to the engine is cut off. The dual-mass flywheel protection strategy is set aiming at the clutch starting mode in the hybrid power vehicle, when the vehicle is flameout at low speed and is started again through the clutch, and when the clutch is started and emergently braked at the moment, the fuel supply in the engine is cut off, so that the dual-mass flywheel is prevented from generating larger impact torque, and the damage of the dual-mass flywheel is avoided.
Description
Technical Field
The invention relates to the technical field of protection of dual-mass flywheels, in particular to a method, a system and a terminal for protecting a dual-mass flywheel in a hybrid vehicle.
Background
With the growing consumer demand for comfortable and quiet vehicles, active research on vibration and noise reduction is being conducted to increase consumer satisfaction. However, light-weight and high-horsepower vehicles have poor performance in reducing vehicle vibration and noise.
When irregular vibration of torque generated from an engine is transmitted to a drive system, vibration and noise from the vehicle drive system vibrate the entire vehicle, and in order to reduce vibration and noise in the drive system, a dual mass flywheel system is applied to minimize vibration of torque generated from the engine and transmitted to the drive system.
The Dual Mass Flywheel (DMF) is a device for connecting an engine and a gearbox, and has great effects on vibration isolation and vibration reduction of an automobile power transmission system; the dual-mass flywheel divides the mass into two parts, wherein the second mass (secondary mass) can improve the inertia moment of the transmission system on the premise of not increasing the inertia moment of the flywheel, so that the resonance rotating speed is reduced to the idle rotating speed and the resonance rotating speed is a low value, and usually the resonance rotating speed interval can be crossed only when the engine is just started and stopped, which is also the reason that the common automobile engine adopting DMF vibrates seriously when being started and stopped; if the rotating speed falls in the region, the resonance of the DMF is easily caused to form impact torque, so that the damage and the failure of the DMF are caused; failure of DMF results in inefficient power transmission, significant deterioration of noise and vibration, and failure of the vehicle to drive.
The hybrid vehicle has a more complex starting mode of the engine than the traditional vehicle due to double power sources, and particularly, a vehicle with a P2.5 architecture has a more unique starting mode due to the fact that the motor and the gearbox are coupled together and the system architecture is complex.
Compared with the 12V starting mode of the traditional power 7DCT, the P2.5 framework vehicle has three starting modes: starting a storage battery at 12V, starting a clutch and starting a high-voltage motor; more starting conditions and more driving conditions and possibility for DMF exist, so that DMF enters a rotating speed resonance region, and damage and failure of DMF are caused.
Therefore, it is necessary to provide DMF protection methods under different start-up regimes.
Disclosure of Invention
The invention aims to provide a method, a system and a terminal for protecting a dual-mass flywheel in a hybrid vehicle, aiming at the defects of the prior art.
The invention is realized by the following technical scheme:
in one aspect, the present invention provides a method of protecting a dual mass flywheel in a hybrid vehicle, the method comprising:
when the engine is flamed out, judging whether a starting instruction is received or not;
if yes, executing the starting instruction;
judging whether the starting instruction is a clutch starting instruction or not;
if yes, judging whether an emergency braking instruction is received within a preset time range after the starting instruction is executed;
if so, judging whether the rotating speed of the clutch dragging shaft is within a first preset rotating speed range;
if so, fuel supply to the engine is cut off.
Further, before the step of determining whether the start instruction is received, the method further includes:
judging whether the rotating speed of the engine is within a second preset rotating speed range or not;
if so, judging whether the duration time of the engine rotating speed in the second preset rotating speed range exceeds a preset threshold value;
if yes, fuel supply in the engine is cut off;
and if the duration time of the rotating speed of the engine in the second preset rotating speed range does not exceed a preset threshold value, supplying fuel to the engine, and judging whether the rotating speed of the clutch dragging shaft is in the first preset rotating speed range or not.
Further, the starting instructions further comprise a 12V battery starting instruction and a high-voltage battery starting instruction.
Further, when the rotation speed of the clutch dragging shaft is not within the first preset rotation speed range, fuel is supplied to the engine.
Further, the step of executing the start instruction further comprises, before the step of executing the start instruction: a clutch activation request is determined.
Further, the clutch activation requirements include:
executing a starting instruction according to a starting command of the clutch, executing the starting instruction after determining the executing action of the clutch or executing the starting instruction after outputting the torque of the clutch.
Further, the method further comprises: supplying fuel to the engine when the engine speed is not within a second preset speed range;
the supplying fuel to the engine includes:
the fuel supply method comprises the steps of supplying fuel to an engine according to a starting command of the clutch, supplying the fuel to the engine after determining an executing action of the clutch, and supplying the fuel to the engine after outputting torque of the clutch.
In another aspect, the present invention also provides a system for protecting a dual mass flywheel in a hybrid vehicle, the system including:
the first starting instruction judging module is used for judging whether a starting instruction is received or not when the engine is flamed out;
the starting instruction execution module is used for executing the starting instruction when receiving the starting instruction;
the second starting instruction judging module is used for judging whether the starting instruction is a clutch starting instruction or not;
the emergency braking instruction judging module is used for judging whether an emergency braking instruction is received within a preset time range after the starting instruction is executed when the starting instruction is a clutch starting instruction;
the first rotating speed judging module is used for judging whether the rotating speed of the clutch dragging shaft is within a first preset rotating speed range or not when an emergency braking instruction is received;
the first fuel cut-off module is used for cutting off fuel supply in the engine when the rotating speed of the clutch dragging shaft is within a first preset rotating speed range.
In another aspect, the present invention also provides a terminal comprising a processor and a memory, wherein the memory stores at least one instruction, at least one program, code set, or instruction set, and the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by the processor to implement the method for dual mass flywheel protection in a hybrid vehicle as described above.
The invention has the following beneficial effects:
the invention sets a dual-mass flywheel protection strategy aiming at a clutch starting mode in a hybrid vehicle, and when the vehicle is flameout at low speed and is started again through a clutch and is emergently braked at the moment of starting the clutch, fuel supply in an engine is cut off, so that the dual-mass flywheel is prevented from generating larger impact torque, and the damage of a dual-mass flywheel (DMF) is avoided.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed for the embodiment or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
FIG. 1 is a schematic diagram of a clutch-dragged engine start operation at low vehicle speeds;
FIG. 2 is a flow chart of a method of protecting a dual mass flywheel in a hybrid vehicle of the present invention;
FIG. 3 is a flow chart of a method of protecting a dual mass flywheel in another hybrid vehicle of the present invention;
FIG. 4 is a schematic diagram of a dual mass flywheel protection system for a hybrid vehicle according to the present invention;
in the figures, the reference numerals correspond to: 1-driving flywheel, 2-driven flywheel, 3-dragging shaft, 4-wheel and 5-vehicle body.
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 present application, 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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the several embodiments provided by the present invention, the described system embodiments are only illustrative, for example, the division of the modules is only one logical function division, and there may be other division manners in actual implementation, for example, a plurality of modules or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of modules or units through some interfaces, and may be in an electrical or other form.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The existing fuel vehicles are started by adopting 12V batteries, and a protection strategy of a dual-mass flywheel (DMF) is correspondingly arranged. The prior art does not consider ways such as clutch launch, and the first application of a P2.5 architecture vehicle, so that the DMF protection strategy in the traditional sense cannot cover the extreme driving conditions of the vehicle.
The hybrid vehicle has a more complex starting mode of the engine than the traditional vehicle due to double power sources, and particularly, a vehicle with a P2.5 architecture has a more unique starting mode due to the fact that the motor and the gearbox are coupled together and the system architecture is complex.
As shown in figure 1, when the hybrid vehicle speed is 10-15kph, the engine on the vehicle body 5 is shut down, and the clutch is required to start, the engine is dragged by the reverse of the gearbox, the rotating speed of the engine is increased to be different from the rotating speed of the dragging shaft 3 by 0-375rpm (the numerical range depends on the rotating speed of the dragging shaft and the starting mode), the engine is sprayed with oil and ignited for starting, when emergency braking is carried out in the starting process, the rotating speed of the shaft of the gearbox is rapidly reduced to 0 because the gearbox and the wheels 4 are directly connected, at the moment, the engine is sprayed with oil and ignited, the forward force of the DMF dragging engine is changed into reverse dragging force, and the driving flywheel 1 and the driven flywheel 2 of the DMF bear shearing forces in two different directions, so that great impact torque is generated, and DMF damage and failure are caused.
Example 1
Please refer to fig. 2. As shown in the figure, the embodiment discloses a method for protecting a dual mass flywheel in a hybrid vehicle, which comprises the following steps:
s201, when an engine is flamed out, judging whether a starting instruction is received;
s202, if yes, executing the starting instruction;
s203, judging whether the starting instruction is a clutch starting instruction or not;
s204, if yes, judging whether an emergency braking instruction is received within a preset time range after the starting instruction is executed;
in practical applications, generally, at the moment of executing the starting command, i.e. at the moment of starting the clutch, it is determined whether an emergency braking command is received;
s205, if yes, judging whether the rotating speed of the clutch dragging shaft is within a first preset rotating speed range;
in practical applications, generally, the rotation speed of the clutch dragging shaft is represented by a vehicle speed, for example, for a hybrid electric vehicle of a P2.5 architecture, a preset vehicle speed range may be set to 10-15 kph; but is not limited to this numerical range;
s206, if yes, cutting off fuel supply in the engine; that is, if it is detected that the rotational speed of the clutch dragging shaft is within the first preset rotational speed range, the fuel supply to the engine is immediately cut off, and the starting is terminated.
Accordingly, if it is detected that the rotation speed of the clutch dragging shaft is not within the first preset rotation speed range, the engine is continuously supplied with fuel.
At the moment of starting the engine, when the accelerator is thrown away for emergency braking, the clutch may not be started successfully, the rotating speed oscillates back and forth in a low-speed area, so that the rotating speed of the engine falls in a rotating speed resonance area of DMF, and the DMF is damaged along with large impact torque. Aiming at the special working condition, the method of the embodiment can judge and cut off the fuel supply in the engine in time, so that the starting of the clutch is not executed, the engine is rapidly flamed out, the fluctuation of the rotating speed of the engine in a low-speed area is avoided, and the damage of DMF is effectively avoided.
The impact torque test of the hybrid electric vehicle with the P2.5 architecture is carried out by respectively adopting the method of example 1 and the DMF protection method (cutting off the fuel supply in the engine when the engine speed is 400 rpm) for starting the 12V battery in the prior art, and the test conditions are as follows: the speed of the hybrid vehicle is 10-15kph, the engine is shut down (at the moment, the engine speed is 0), and the clutch is required to be started; the test results are shown in table 1 below:
table 1: impact torque test
Therefore, the method can effectively avoid the impact torque caused by driving under extreme working conditions, thereby effectively avoiding DMF damage.
The embodiment also discloses a terminal, which comprises a processor and a memory, wherein the memory is stored with at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to realize the method for protecting the dual-mass flywheel in the hybrid vehicle.
Example 2
As shown in fig. 3, the present embodiment discloses a method for protecting a dual mass flywheel in a hybrid vehicle, comprising the steps of:
s301, when the vehicle is started, judging whether the rotating speed of the engine is within a second preset rotating speed range;
in practical applications, generally, the second preset rotation speed range refers to a resonance rotation speed region of the dual-mass flywheel, and when the engine rotation speed falls into the region, DMF resonance is caused; the resonance speed range of a dual mass flywheel is dependent on the characteristics of the flywheel, so the resonance speed range is not constant. The second preset rotation speed range in this embodiment is 100-750rpm, and the value can be adjusted according to the actual situation;
s302, if yes, judging whether the duration time of the engine rotating speed in the second preset rotating speed range exceeds a preset threshold value; at the moment, the vehicle is still not normally started, and the vehicle speed is 0;
it should be noted that the duration here may be set according to the actual vehicle condition, and if the engine speed can rapidly cross the second preset speed range, i.e. the second preset speed range is crossed within the preset time, the fuel supply in the engine does not need to be cut off;
s303, if yes, cutting off fuel supply in the engine; if the duration of the engine speed in the second preset speed range does not exceed a preset threshold, supplying fuel to the engine; and continues to step S304;
in practical application, generally, in a cold climate, when the engine needs to be started, if the engine cannot be started even if the engine continuously rotates within a second preset rotation speed range (the resonance rotation speed of the dual-mass flywheel) for a long time, the engine needs to be stopped to be started, so as to avoid damage to the dual-mass flywheel.
S304, when the engine is flamed out, judging whether a starting instruction is received;
s305, if yes, executing the starting instruction;
s306, judging whether the starting instruction is a clutch starting instruction or not;
s307, if yes, judging whether an emergency braking instruction is received within a preset time range after the starting instruction is executed;
s308, if yes, judging whether the rotating speed of the clutch dragging shaft is within a first preset rotating speed range;
and S309, if so, cutting off the fuel supply in the engine.
The embodiment also discloses a terminal, which comprises a processor and a memory, wherein the memory is stored with at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to realize the method for protecting the dual-mass flywheel in the hybrid vehicle.
Example 3
The embodiment discloses a method for protecting a dual-mass flywheel in a hybrid vehicle, which comprises the following steps:
when the engine is flamed out, judging whether a starting instruction is received or not; the start commands also include a clutch start command, a 12V battery start command and a high voltage battery start command (high voltage refers to a voltage higher than 300V),
if yes, executing the starting instruction;
judging whether the starting instruction is a clutch starting instruction or not;
if yes, judging whether an emergency braking instruction is received within a preset time period after the starting instruction is executed;
if so, judging whether the rotating speed of the clutch dragging shaft is within a preset range;
if so, fuel supply to the engine is cut off.
In some embodiments, the fuel is supplied to the engine when the rotational speed of the clutch dragging shaft is not within a preset range;
in some embodiments, prior to supplying fuel to the engine, further comprising:
judging the starting requirement of the clutch;
and supplying fuel to the engine according to the starting demand so as to execute a clutch starting command.
The clutch activation requirements include:
executing a starting instruction according to a starting command of the clutch, executing the starting instruction after determining the execution action of the clutch or executing the starting instruction after outputting the torque of the clutch;
accordingly, the supplying fuel to the engine according to the start-up demand includes:
the fuel is supplied to the engine according to a start command of the clutch, the fuel is supplied to the engine after the execution action of the clutch is determined, or the fuel is supplied to the engine after the torque of the clutch is output.
In some embodiments, the step of executing the boot instruction further comprises, before the step of:
judging the starting requirement of the clutch;
the clutch activation requirements include:
executing a starting instruction according to a starting command of the clutch, executing the starting instruction after determining the executing action of the clutch or executing the starting instruction after outputting the torque of the clutch.
In some embodiments, the step of executing the boot instruction further comprises:
judging the state of the clutch, the running state of the engine, the speed, the state of the starter, the rotating speed of the engine, the type of the gearbox and whether to change the idea starting (COM), wherein COM is called change of mind, and Chinese is explained as follows: the change of mind starting means starting again in the flameout process.
Example 4
As shown in fig. 4, the present embodiment discloses a protection system for a dual mass flywheel in a hybrid vehicle, including:
a first starting instruction judging module 401, configured to judge whether a starting instruction is received when the engine is turned off;
a starting instruction executing module 402, configured to execute the starting instruction when receiving the starting instruction;
a second starting instruction judging module 403, configured to judge whether the starting instruction is a clutch starting instruction;
an emergency braking instruction determining module 404, configured to determine, when the starting instruction is a clutch starting instruction, whether an emergency braking instruction is received within a preset time range after the starting instruction is executed;
in practical applications, generally, at the moment of executing the starting command, i.e. at the moment of starting the clutch, it is determined whether an emergency braking command is received;
a first rotation speed judging module 405, configured to, when an emergency braking instruction is received, judge whether a rotation speed of a clutch dragging shaft is within a first preset rotation speed range;
in practical applications, generally, the rotation speed of the clutch dragging shaft is represented by a vehicle speed, for example, for a hybrid electric vehicle of a P2.5 architecture, a preset vehicle speed range may be set to 10-15 kph; but is not limited to this numerical range;
a first fuel cutoff module 406 to cut off fuel supply to the engine when a rotational speed of the clutch dragging shaft is within a first preset rotational speed range.
Accordingly, if the rotation speed of the clutch dragging shaft is not within the first preset rotation speed range, the engine is continuously supplied with fuel.
At the moment of starting the engine, when the accelerator is thrown away for emergency braking, the clutch may not be started successfully, the rotating speed oscillates back and forth in a low-speed area, so that the rotating speed of the engine falls in a rotating speed resonance area of DMF, and the DMF is damaged along with large impact torque. Aiming at the special working condition, the method of the embodiment can judge and cut off the fuel supply in the engine in time, so that the starting of the clutch is not executed, the engine is rapidly flamed out, the fluctuation of the rotating speed of the engine in a low-speed area is avoided, and the damage of DMF is effectively avoided.
In some embodiments, the system further comprises:
the second rotating speed judging module is used for judging whether the rotating speed of the engine is within a second preset rotating speed range or not;
in practical applications, generally, the second preset rotation speed range refers to a resonance rotation speed region of the dual-mass flywheel, and when the engine rotation speed falls into the region, DMF resonance is caused; the resonance speed range of a dual mass flywheel is dependent on the characteristics of the flywheel, so the resonance speed range is not constant. The second preset rotation speed range in this embodiment is 100-750rpm, and the value can be adjusted according to the actual situation;
the time judgment module is used for judging whether the duration time of the engine rotating speed in a second preset rotating speed range exceeds a preset threshold value or not when the rotating speed of the engine is in the second preset rotating speed range;
it should be noted that the duration here may be set according to the actual vehicle condition, and if the engine speed can rapidly cross the second preset speed range, i.e. the second preset speed range is crossed within the preset time, the fuel supply in the engine does not need to be cut off;
the second fuel cut-off module is used for cutting off fuel supply in the engine when the duration time of the engine rotating speed in the second preset rotating speed range exceeds a preset threshold value;
the first fuel supply module is used for supplying fuel to the engine when the duration of the engine speed in the second preset speed range does not exceed a preset threshold.
In practical application, generally, in a cold climate, when the engine needs to be started, if the engine cannot be started even if the engine continuously rotates within a second preset rotation speed range (the resonance rotation speed of the dual-mass flywheel) for a long time, the engine needs to be stopped to be started, so as to avoid damage to the dual-mass flywheel.
In some embodiments, the start instructions further include a 12V battery start instruction and a high voltage battery start instruction.
In some embodiments, the system further comprises:
the starting requirement judging module is used for judging the starting requirement of the clutch;
the start instruction execution module 402 includes:
the first execution unit is used for executing a starting instruction according to a starting command of the clutch;
the second execution unit is used for executing a starting instruction after determining the execution action of the clutch;
and the third execution unit is used for executing the starting command after the torque of the clutch is output.
The starting instruction execution module 402 is further configured to supply fuel to the engine according to the starting demand to execute a clutch starting instruction.
In some embodiments, the system further comprises:
the second fuel supply module is used for supplying fuel to the engine when the rotating speed of the engine is not in a second preset rotating speed range;
the second fuel supply module includes:
a first fuel supply subunit for supplying fuel to the engine in accordance with a start command of the clutch;
a second fuel supply subunit for supplying fuel to the engine after determining the actuation of the clutch;
and a third fuel supply subunit for supplying fuel to the engine after outputting the torque of the clutch.
In some embodiments, the system further comprises:
the clutch state judging module is used for judging the current state of the clutch;
the engine running state judging module is used for judging the running state of the engine;
the vehicle speed detection module is used for detecting the vehicle speed of the vehicle;
the starter state judging module is used for judging the current state of the starter;
the engine rotating speed detection module is used for detecting the rotating speed of the engine;
the gearbox model acquisition module is used for acquiring the model of the gearbox;
the starting judgment module is used for judging whether to change idea starting (COM), the COM is called change of mind completely, and Chinese explanation: the change of mind starting means starting again in the flameout process.
The invention sets a dual-mass flywheel protection strategy aiming at a clutch starting mode in a hybrid vehicle, and when the vehicle is flameout at low speed and is started again through a clutch and is emergently braked at the moment of starting the clutch, fuel supply in an engine is cut off, so that the dual-mass flywheel is prevented from generating larger impact torque, and the damage of a dual-mass flywheel (DMF) is avoided.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The above description is a preferred embodiment of the present invention, and the technical solutions of the present invention are further described in detail, and are not intended to limit the protection scope of the present invention, it should be noted that, for those skilled in the art, many modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations are also regarded as the protection scope of the present invention.
Claims (8)
1. A method of protecting a dual mass flywheel in a hybrid vehicle, the method comprising:
when the engine is flamed out, judging whether the rotating speed of the engine is within a second preset rotating speed range;
if so, judging whether the duration time of the engine rotating speed in the second preset rotating speed range exceeds a preset threshold value; if not, supplying fuel to the engine;
judging whether a starting instruction is received or not;
if yes, executing the starting instruction;
judging whether the starting instruction is a clutch starting instruction or not;
if yes, judging whether an emergency braking instruction is received within a preset time range after the starting instruction is executed;
if so, judging whether the rotating speed of the clutch dragging shaft is within a first preset rotating speed range;
if so, fuel supply to the engine is cut off.
2. The method of claim 1, wherein the start-up instructions further comprise a 12V battery start-up instruction and a high voltage battery start-up instruction.
3. The method of claim 1, further comprising: and supplying fuel to the engine when the rotating speed of the clutch dragging shaft is not in a first preset rotating speed range.
4. The method of claim 1, wherein the step of executing the boot instructions is preceded by the step of: a clutch activation request is determined.
5. The method of claim 4, wherein the clutch activation requirement comprises:
executing a starting instruction according to a starting command of the clutch, executing the starting instruction after determining the executing action of the clutch or executing the starting instruction after outputting the torque of the clutch.
6. The method of claim 1, further comprising:
supplying fuel to the engine when the engine speed is not within a second preset speed range;
the supplying fuel to the engine includes:
the fuel supply method comprises the steps of supplying fuel to an engine according to a starting command of the clutch, supplying the fuel to the engine after determining an executing action of the clutch, and supplying the fuel to the engine after outputting torque of the clutch.
7. A system for protecting a dual mass flywheel in a hybrid vehicle, the system comprising:
the first starting instruction judging module is used for judging whether a starting instruction is received or not when the engine is flamed out;
the starting instruction execution module is used for executing the starting instruction when receiving the starting instruction;
the second starting instruction judging module is used for judging whether the starting instruction is a clutch starting instruction or not;
the emergency braking instruction judging module is used for judging whether an emergency braking instruction is received within a preset time range after the starting instruction is executed when the starting instruction is a clutch starting instruction;
the first rotating speed judging module is used for judging whether the rotating speed of the clutch dragging shaft is within a first preset rotating speed range or not when an emergency braking instruction is received;
the first fuel cut-off module is used for cutting off fuel supply in the engine when the rotating speed of the clutch dragging shaft is within a first preset rotating speed range.
8. A terminal, characterized in that it comprises a processor and a memory in which at least one instruction, at least one program, set of codes or set of instructions is stored, which is loaded and executed by the processor to implement a method of protection of a dual mass flywheel in a hybrid vehicle according to any one of claims 1 to 6.
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| CN110686901B (en) * | 2019-09-29 | 2021-06-22 | 潍柴动力股份有限公司 | Control method and device for engine pilot injection |
| CN111255583B (en) * | 2020-01-20 | 2021-05-11 | 东风汽车集团有限公司 | Protection control method and storage medium for dual-mass flywheel of engine |
| CN114526156A (en) * | 2022-01-18 | 2022-05-24 | 东风汽车集团股份有限公司 | Dual mass flywheel device, vehicle, and control method for vehicle |
| CN114506329B (en) * | 2022-02-14 | 2023-05-30 | 东风汽车集团股份有限公司 | Vehicle starting control method and system |
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| DE102013104507A1 (en) * | 2012-05-04 | 2013-11-07 | Ford Global Technologies, Llc | Method for adjusting operation of hybrid vehicle powertrain for hybrid vehicle system, involves adjusting actuator in response to speed and torque difference in dual mass flywheel positioned in drive train between engine and clutch |
| US9108613B2 (en) * | 2012-10-08 | 2015-08-18 | Ford Global Technologies, Llc | Method and system for stopping an engine |
| DE102014210449A1 (en) * | 2014-06-03 | 2015-12-03 | Schaeffler Technologies AG & Co. KG | Torsional vibration damper, method for designing a torsional vibration damper, and torque transmission device |
| KR20160063848A (en) * | 2014-11-27 | 2016-06-07 | 현대자동차주식회사 | Method and device for protecting dual mass flywheel for vehicle |
| EP3377787B1 (en) * | 2015-11-16 | 2020-03-11 | Per Stensgaard Innovasjon AS | Dual-mass flywheel concept for internal combustion engines |
| DE102016202828A1 (en) * | 2016-02-24 | 2017-08-24 | Bayerische Motoren Werke Aktiengesellschaft | Drive system for a hybrid vehicle and method for operating such a drive system |
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