CN113464339B - Dragging torque control method and system - Google Patents
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- CN113464339B CN113464339B CN202110749335.3A CN202110749335A CN113464339B CN 113464339 B CN113464339 B CN 113464339B CN 202110749335 A CN202110749335 A CN 202110749335A CN 113464339 B CN113464339 B CN 113464339B
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- 230000011218 segmentation Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 14
- 208000035874 Excoriation Diseases 0.000 abstract description 6
- 238000005299 abrasion Methods 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 4
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0803—Circuits or control means specially adapted for starting of engines characterised by means for initiating engine start or stop
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/02—Parameters used for control of starting apparatus said parameters being related to the engine
- F02N2200/022—Engine speed
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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 dragging torque control method and a system, wherein in the starting process of an engine, the method controls the change rate of different dragging torques in each interval according to different engine rotating speed intervals, so that the dragging torque of a generator to the engine is reduced along with the rise of the rotating speed of the engine, the smooth starting of the engine is realized, the shaking and noise caused by large rotating speed change in the starting process are avoided, the abrasion risk of an engine bearing bush is considered, the maintaining time of a low-rotating-speed engine is prolonged, the dragging torque sectional control is realized, the NVH performance of an electric automobile is improved, and the method has important significance for prolonging the service life of the engine.
Description
Technical Field
The application relates to the technical field of electric vehicles, in particular to a dragging torque control method and system.
Background
Energy and environmental problems are important factors restricting the sustainable development of human society and economy, and in the field of transportation, the electric automobile has the advantages of zero emission, no pollution and the like, but the battery driving range and charging factors greatly limit the large-scale market popularization of the electric automobile. The hybrid electric vehicle is a power device composed of an engine, a generator, a driving motor and a battery pack, and different driving modes of the vehicle are realized through the control of a clutch, for example: the hybrid electric vehicle has the advantages that the pure electric vehicle is driven purely, the series connection driving mode, the parallel connection driving mode, the braking energy recovery mode and other working modes are adopted, the fuel economy of the vehicle is optimized through the working modes, and therefore the driving range of the hybrid electric vehicle is greatly improved.
As is well known, for traditional vehicle types, the starting of an engine needs to be assisted by a starter, and in the vehicle starting process, a generator directly drags a vehicle to start; during the starting process, if the engine speed or the engine load has large fluctuation, NVH noise which influences subjective feeling of customers, such as abnormal noise of vehicles, can occur.
Disclosure of Invention
The invention provides a dragging torque control method and a dragging torque control system, which are used for solving or partially solving the technical problem of NVH noise caused by insufficient smoothness of the starting of an engine at present.
In order to solve the above technical problem, the present invention provides a drag torque control method, including:
acquiring the current rotating speed of the engine in real time;
determining a corresponding target torque interval from a torque subsection interval set according to the current rotating speed of the engine;
controlling engine start using the rate of torque change in the target control interval.
Preferably, the determining a corresponding target torque interval from a torque segment set according to the current rotation speed of the engine specifically includes: if the current rotating speed of the engine is smaller than a first rotating speed threshold value, determining a first torque subsection interval as the target torque interval from a torque subsection interval set;
the controlling the engine to start by using the torque change rate in the target control interval specifically comprises: determining to follow based on the first torque segment interval
Wherein X > 1 controls the engine start.
Preferably, the determining a corresponding target torque interval from a torque segment set according to the current rotation speed of the engine specifically includes: if the current rotating speed of the engine is between the first rotating speed threshold value and the second rotating speed threshold value, determining a second torque subsection interval as the target torque interval from a torque subsection interval set;
the controlling the engine to start by using the torque change rate in the target control interval specifically comprises: controlling the engine start based on the second torque segment interval, increasing a torque rise rate from the first torque rise rate to a fixed second torque rise rate.
Preferably, the determining a corresponding target torque interval from a torque segment set according to the current rotation speed of the engine specifically includes: if the current rotating speed of the engine is greater than the second rotating speed threshold value, determining a third torque subsection interval as the target torque interval from a torque subsection interval set;
the controlling the engine to start by using the torque change rate in the target control interval specifically comprises: controlling the engine start to ramp up the torque ramp rate from the second torque ramp rate to a third torque ramp rate based on the third torque segment interval.
Preferably, the determining a corresponding target torque interval from a torque segment set according to the current rotation speed of the engine specifically includes: if the deviation between the current actual rotating speed of the engine and the target rotating speed is smaller than a preset difference value, determining a fourth torque subsection interval as the target torque interval from the torque subsection interval set;
the controlling the engine to start by using the torque change rate in the target control interval specifically comprises: determining a first torque down rate to control the engine start based on the fourth torque segment interval.
Preferably, after the current rotating speed of the engine is obtained in real time, the method further comprises:
judging whether the engine is in a starting working condition or not according to the current rotating speed of the engine;
and if so, determining a corresponding target torque interval from the torque subsection interval set according to the current rotating speed of the engine.
Preferably, after the judging whether the engine is in the starting working condition according to the current rotating speed of the engine, the method further comprises:
and if the engine starting working condition is finished, determining a second torque drop rate based on the temperature of the engine coolant to control the engine to run.
As an alternative embodiment, the present invention further comprises a motoring torque control system comprising:
the acquisition module is used for acquiring the current rotating speed of the engine in real time;
the determining module is used for determining a corresponding target torque interval from a torque subsection interval set according to the current rotating speed of the engine;
a control module controls engine start using a rate of torque change in the target control interval.
As an alternative embodiment, the invention also includes an engine comprising: the engine is started according to the motoring torque control method according to the above technical solution.
As an alternative embodiment, the invention also includes a vehicle comprising: an engine started according to the motoring torque control method according to the above-described technical means.
Through one or more technical schemes of the invention, the invention has the following beneficial effects or advantages:
the invention discloses a dragging torque control method and a system, wherein in the starting process of an engine, the method controls the change rate of different dragging torques in each interval aiming at different engine rotating speed intervals, so that the dragging torque of a generator to the engine is reduced along with the increase of the rotating speed of the engine, the smooth starting of the engine is realized, the shaking and noise caused by large rotating speed change or large engine dragging load change in the starting process or large engine dragging load change are avoided, meanwhile, the abrasion risk of an engine bearing bush is considered, the low-rotating-speed engine maintenance time is prolonged, the dragging torque sectional control is realized, the NVH (noise vibration and harshness) performance of an electric automobile is improved, and the method has important significance for the service life of the engine.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a diagram illustrating an implementation of a motoring torque control method according to an embodiment of the present invention;
FIG. 2 illustrates a schematic diagram of torque rate of change control according to one embodiment of the present invention;
FIG. 3 illustrates a strategy diagram for torque rate of change control according to one embodiment of the present invention;
FIG. 4 is a diagram illustrating an implementation of a motoring torque control system, according to an embodiment of the present invention.
Detailed Description
In order to make the present application more clearly understood by those skilled in the art to which the present application pertains, the following detailed description of the present application is made with reference to the accompanying drawings.
Generally, during the engine starting process, a generator is used to play the role of a starter, and the generator is used to drag the engine speed to a target speed. In the starting process, the engine and the engine have a corresponding resonance interval (for example, 200-600 rpm), so that the engine speed needs to quickly pass through the interval, otherwise the engine and the generator resonate to bring NVH (noise, vibration and harshness) noise, so that a larger dragging torque is needed, the engine speed is quickly dragged to an idle speed target speed to realize the starting of the engine, and the starting time of the engine is shortened; however, if the engine starting time is shortened, the dragging speed of the engine is too fast, the change of the engine speed is large, the risk of abrasion or damage of an engine bearing bush is brought, the durability of the engine starting is difficult to ensure, and the risk of damage of parts is caused.
Therefore, in the embodiment of the invention, in consideration of the above problems, in the starting process of the engine, the torque of the generator is controlled based on the vehicle control unit, and the change rate of different dragging torques in each interval is controlled according to different engine speed intervals, so that the dragging torque of the generator to the engine is reduced along with the rise of the engine speed, the smooth starting of the engine is realized, the shaking and the noise caused by large speed change in the starting process are avoided, the abrasion risk of an engine bearing bush is considered, the maintaining time of the low-speed engine is prolonged, the dragging torque is controlled in a segmented manner, the NVH performance of the electric vehicle is improved, and the service life of the engine is also significant.
According to the embodiment, the speed of the torque is controlled and optimized in the starting stage, the rotating speed of the engine is subjected to sectional treatment control, NVH is achieved, the starting time of the engine is prolonged, and the risk of a bearing bush mode is reduced.
In a specific implementation process, referring to fig. 1, the drag torque control method according to the embodiment of the present invention includes the following steps:
and 101, acquiring the current rotating speed of the engine in real time.
The current rotating speed of the engine is a standard for judging the running state of the engine, and whether the engine is in a starting working condition or not is judged according to the current rotating speed of the engine. And if so, determining a corresponding target torque interval from the torque segmented interval set according to the current rotating speed of the engine. If the engine starting condition is finished, indicating that the engine is in the running process, the dragging torque of the engine needs to be reduced.
For example, the engine is currently rotating at [0, 1100] rpm, and the engine is in a start-up condition. The current engine speed is above 1100rpm and the engine is in operation. And if the engine is in a starting working condition, implementing torque segmentation strategy control, and if the engine is not in a starting working condition, reducing the dragging torque of the engine. Of course, the numerical values are only examples, and other numerical values can be calibrated; for example, the cold or light-off phase may be at 1300rpm and the heat engine may be at 1100rpm.
And 102, determining a corresponding target torque interval from a torque subsection interval set according to the current rotating speed of the engine.
In the present embodiment, as shown in fig. 3, the drag torque of the present invention is calculated as a whole based on the starting torque and the friction torque. The starting dragging torque calibration table is provided with the difference between the actual rotating speed and the target rotating speed of the engine in the embodiment; and when the actual rotating speed of the engine is lower than the target rotating speed, a larger dragging torque is adopted, and the dragging torque is reduced along with the increase of the rotating speed of the engine. The friction torque characterizes the torque required to overcome engine operation at the current ambient temperature. Start drag friction torque correction factor: at low rotational speeds, the friction torque is small, for example 1. As the rotation speed increases, the friction coefficient may gradually become 0. The overall starting drag torque should be the starting drag torque calibration table minus the friction torque multiplied by the starting drag friction correction factor.
Further, the starting dragging torque is limited by a first torque subsection interval, a second torque subsection interval, a third torque subsection interval and a fourth torque subsection interval. Namely: the torque of each segment is a limit for the calculated total starting drag torque.
For balanced engine smooth start, reduce engine axle bush wearing and tearing risk when promoting electric automobile's NVH performance, will be originally according to the engine speed who obtains in real time and adjust the basis of the drag moment of torsion of generator, divide into the moment of torsion segmentation interval and control, this embodiment divides the engine start drag moment of torsion of start-up operating mode in-process into 4 intervals and controls, does: the torque control device comprises a first torque subsection interval, a second torque subsection interval, a third torque subsection interval and a fourth torque subsection interval.
The four torque subsection intervals correspond to respective rotating speed intervals, if the current rotating speed of the engine is in the corresponding rotating speed interval, the corresponding torque subsection interval is called to correspond to the torque change rate, and step 103 is executed.
And 103, controlling the engine to start by using the torque change rate in the target control interval.
Specifically, each torque subsection interval corresponds to the respective torque change rate, so when the engine is controlled to start, accurate subsection control can be achieved according to different engine starting actual conditions, and then the NVH performance of the electric automobile is improved while the abrasion risk of an engine bearing bush is reduced.
The following embodiment describes a specific implementation of the torque staging interval.
In this embodiment, the engine start control is performed for the rotation speeds in the same rotation speed range using the torque change rates corresponding to the same torque segment interval.
And if the current rotating speed of the engine is less than a first rotating speed threshold value x1, determining a first torque subsection interval from the torque subsection interval set as the target torque interval. Based on the first torque segment interval, determining to
Wherein X > 1 controls the engine start.
Therein, the first rotational speed threshold x1 may be calibrated, for example 0rpm.
Specifically, when the engine is started in the early stage, the dynamic friction torque slowly rises, the friction torque represents the friction resistance of the engine, and when the external power is greater than the friction torque, the engine starts to change from a static state to a running state. The drag torque of the present embodiment also rises. The torque increase rate dM1 is friction torque/10 (ms), but may be other values, and theoretically after about 100ms, the gradually increasing drag torque is equal to the engine friction torque, and it is considered that the rotation speed starts to be greater than 0. The torque of the torque subsection interval is M1.
It can be seen that in the torque subsection interval, the engine speed is low, the torque rising rate is also low, and only friction torque is achieved
The engine crankshaft can build engine oil pressure when the motor drives the engine crankshaft to rotate when the engine crankshaft is started smoothly, the engine crankshaft has a certain time for lubrication, the risk of bearing bush abrasion is reduced, meanwhile, the bearing bush with a higher assembly price is avoided, and the cost of the bearing bush can be optimized.
And if the current rotating speed of the engine is between the first rotating speed threshold value x1 and the second rotating speed threshold value x2, determining a second torque subsection interval from the torque subsection interval set as the target torque interval. Controlling the engine start-up based on the second torque segment interval to ramp up a torque ramp-up rate from the first torque ramp-up rate to a fixed second torque ramp-up rate.
Specifically, the first and second rotational speed thresholds x1 and x2 may be calibrated, such as (0, 150) rpm.
The torque M2 in this interval is based on the torque M1, and a fixed torque increase rate is implemented, with M2= M1+ dM2. Therefore, the second torque subsection interval with the higher torque rising rate is arranged, and the change rate of the rotating speed is correspondingly improved due to the higher torque change rate, so that the rotating speed can continuously and quickly cross the resonance interval of the engine and the generator, and the time of the starting process of the engine is shortened.
And if the current rotating speed of the engine is greater than the second rotating speed threshold value x2, determining a third torque subsection interval as the target torque interval from the torque subsection interval set. Controlling the engine start based on the third torque split interval to ramp the torque ramp rate from the second torque ramp rate to a third torque ramp rate.
Specifically, the torque increase rate in the present embodiment is increased from dM2 to dM3, at which the start-drag torque increase rate is no longer limited; the engine motoring torque is M3. Therefore, the third torque subsection interval with higher torque rising rate is arranged, and the change rate of the rotating speed is correspondingly improved due to the higher torque change rate, so that the rotating speed can continuously and quickly cross the resonance interval of the engine and the generator, and the time of the starting process of the engine is shortened.
And if the deviation between the current actual rotating speed of the engine and the target rotating speed is smaller than a preset difference value, determining a fourth torque subsection interval as the target torque interval from the torque subsection interval set. Determining a first torque-down rate to control the engine start based on the fourth torque segment interval. Specifically, when the deviation between the actual rotating speed of the engine and the target rotating speed is smaller than a preset difference value, the generator torque M4 starts to be gently reduced, the torque reduction rate is dM4, and the dragging torque is M4= M3-dM4.
And if the engine starting working condition is finished, determining a second torque reduction rate based on the temperature of the engine coolant to control the engine to run. When the engine start ends, the torque down rate is found as dM5 based on the engine coolant temperature table, at which the motoring torque M5= M4-dM4.
Referring to fig. 2, a schematic diagram of a starting torque segment is shown, and it can be seen from this figure that, compared with the existing situation that the change rate of the first three segments is not limited, the present embodiment limits the change rate of the torque of the first three segments, and uses different change rates of the torque for different requirements, for example, when the rotation speed is less than the first rotation speed threshold, the increase and decrease of the starting time is realized through the control of the change rate of the torque. When the rotating speed is between the first rotating speed threshold value and the second rotating speed threshold value, the torque change rate can be improved, so that the torque change rate can quickly pass through a resonance area, and smooth starting is realized. After the end of the engine start, the torque change rate can be decreased in accordance with the engine coolant temperature correspondence, and the like. Specific implementation control strategy see fig. 3.
Based on the same inventive concept, referring to fig. 4, the following embodiments disclose a drag torque control system, including:
the obtaining module 401 is configured to obtain a current rotation speed of the engine in real time.
A determining module 402 is configured to determine a corresponding target torque interval from a set of torque segments according to the current engine speed.
A control module 403 controls engine start with the rate of change of torque in the target control interval.
As an optional embodiment, the determining module 402 is specifically configured to:
if the current rotating speed of the engine is smaller than a first rotating speed threshold value, determining a first torque subsection interval as the target torque interval from a torque subsection interval set;
determining to follow based on the first torque segment interval
Wherein X > 1 controls the engine start.
As an optional embodiment, the determining module 402 is specifically configured to:
if the current rotating speed of the engine is between the first rotating speed threshold value and the second rotating speed threshold value, determining a second torque subsection interval as the target torque interval from a torque subsection interval set;
controlling the engine start based on the second torque segment interval, increasing a torque rise rate from the first torque rise rate to a fixed second torque rise rate.
As an optional embodiment, the determining module 402 is specifically configured to:
if the current rotating speed of the engine is greater than the second rotating speed threshold value, determining a third torque subsection interval as the target torque interval from a torque subsection interval set;
controlling the engine start based on the third torque split interval to ramp the torque ramp rate from the second torque ramp rate to a third torque ramp rate.
As an optional embodiment, the determining module 402 is specifically configured to:
if the deviation between the current actual rotating speed of the engine and the target rotating speed is smaller than a preset difference value, determining a fourth torque subsection interval as the target torque interval from the torque subsection interval set;
determining a first torque-down rate to control the engine start based on the fourth torque segment interval.
As an alternative embodiment, the system further comprises:
the judging module is used for judging whether the engine is in a starting working condition or not according to the current rotating speed of the engine;
and if so, determining a corresponding target torque interval from the torque subsection interval set according to the current rotating speed of the engine.
As an alternative embodiment, the system further comprises:
a control module 403 determines a second rate of torque reduction based on an engine coolant temperature to control operation of the engine if the engine start condition is over.
Based on the same inventive concept, the following embodiments disclose an engine, characterized by comprising: the engine is started according to the motoring torque control method described above.
Based on the same inventive concept, the following embodiments disclose a vehicle, characterized by comprising: and an engine that is started according to the motoring torque control method described above.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the present application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (9)
1. A motoring torque control method, characterized by comprising:
acquiring the current rotating speed of an engine in real time;
determining corresponding target torque intervals from a torque subsection interval set according to the current rotating speed of the engine, wherein the torque subsection intervals correspond to respective rotating speed intervals;
controlling engine start using the rate of torque change in the target torque interval;
the method for determining the corresponding target torque interval from the torque segmentation interval set according to the current rotating speed of the engine specifically comprises the following steps: if the current rotating speed of the engine is smaller than a first rotating speed threshold value, determining a first torque subsection interval as the target torque interval from a torque subsection interval set;
the controlling the starting of the engine by using the torque change rate in the target torque interval specifically comprises the following steps: determining to follow based on the first torque segment interval
The first torque rise rate of (c) controls the engine start, wherein,
。
2. the method according to claim 1, wherein the determining a corresponding target torque interval from a set of torque segment intervals based on the current engine speed comprises: if the current rotating speed of the engine is between the first rotating speed threshold value and the second rotating speed threshold value, determining a second torque subsection interval as the target torque interval from a torque subsection interval set;
the controlling the starting of the engine by using the torque change rate in the target torque interval specifically comprises the following steps: controlling the engine start-up based on the second torque segment interval to ramp up a torque ramp-up rate from the first torque ramp-up rate to a fixed second torque ramp-up rate.
3. The method according to claim 2, wherein the determining a corresponding target torque interval from a set of torque segment intervals based on the current engine speed comprises: if the current rotating speed of the engine is greater than the second rotating speed threshold value, determining a third torque subsection interval as the target torque interval from a torque subsection interval set;
the controlling the starting of the engine by using the torque change rate in the target torque interval specifically comprises the following steps: controlling the engine start based on the third torque split interval to ramp the torque ramp rate from the second torque ramp rate to a third torque ramp rate.
4. The method according to claim 3, wherein said determining a corresponding target torque interval from a set of torque segment intervals based on said current engine speed comprises:
determining a fourth torque subsection interval from the torque subsection interval set as the target torque interval;
the controlling the starting of the engine by using the torque change rate in the target torque interval specifically comprises the following steps: determining a first torque down rate to control the engine start based on the fourth torque segment interval.
5. The method of any one of claims 1-4, wherein after said obtaining in real time a current engine speed, the method further comprises:
judging whether the engine is in a starting working condition or not according to the current rotating speed of the engine;
and if so, determining a corresponding target torque interval from the torque segmented interval set according to the current rotating speed of the engine.
6. The method of claim 5, wherein after determining whether the engine is in a starting condition based on the current engine speed, the method further comprises:
and if the engine starting working condition is finished, determining a second torque reduction rate based on the temperature of the engine coolant to control the engine to run.
7. A motoring torque control system, comprising:
the acquisition module is used for acquiring the current rotating speed of the engine in real time;
the determining module is used for determining a corresponding target torque interval from a torque subsection interval set according to the current rotating speed of the engine, and the torque subsection intervals correspond to respective rotating speed intervals;
a control module to control engine start using a rate of torque change in the target torque interval
The method for determining the corresponding target torque interval from the torque segmentation interval set according to the current rotating speed of the engine specifically comprises the following steps: if the current rotating speed of the engine is smaller than a first rotating speed threshold value, determining a first torque subsection interval as the target torque interval from a torque subsection interval set;
the controlling the starting of the engine by using the torque change rate in the target torque interval specifically comprises the following steps: determining to follow based on the first torque segment interval
The first torque rise rate of (c) controls the engine start, wherein,
。
8. an engine, comprising: the engine is started according to the motoring torque control method according to any one of claims 1 to 6.
9. A vehicle, characterized by comprising: an engine started according to the motoring torque control method as recited in any one of claims 1 to 6 above.
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|---|---|---|---|---|
| JP2006315510A (en) * | 2005-05-12 | 2006-11-24 | Toyota Motor Corp | Power output device and its control method, and automobile |
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| CN111976696B (en) * | 2020-01-19 | 2021-11-16 | 蜂巢传动科技河北有限公司 | Engine control method and device for hybrid vehicle |
| CN112721905B (en) * | 2021-01-07 | 2022-04-08 | 浙江吉利控股集团有限公司 | Starting method and device of engine in dual-motor hybrid power system and vehicle |
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