CN111661031A - Engine start-stop control method and device, vehicle-mounted equipment and storage medium - Google Patents
Engine start-stop control method and device, vehicle-mounted equipment and storage medium Download PDFInfo
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- CN111661031A CN111661031A CN202010544676.2A CN202010544676A CN111661031A CN 111661031 A CN111661031 A CN 111661031A CN 202010544676 A CN202010544676 A CN 202010544676A CN 111661031 A CN111661031 A CN 111661031A
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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
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
- B60W20/15—Control strategies specially adapted for achieving a particular effect
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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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0666—Engine torque
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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 embodiment of the invention discloses an engine start-stop control method and device, vehicle-mounted equipment and a storage medium. The method comprises the following steps: when a series driving mode request is received, controlling the engine to enter an engine dragging state and outputting a series target engine torque; controlling an engine working point to be adjusted based on the series target engine torque, and controlling the whole vehicle to be in a series driving mode or controlling the engine to enter an engine stop state according to an adjustment result; and if the whole vehicle is in the series driving mode or the engine enters an engine stop state, receiving a pure electric driving mode request to control the whole vehicle to be switched into the pure electric driving mode. The technical scheme of the embodiment of the invention ensures the control continuity of the start-stop of the engine and timely and effectively finishes the control of the start-stop of the engine.
Description
Technical Field
The embodiment of the invention relates to the technical field of new energy vehicle control, in particular to a method and a device for controlling start and stop of an engine, vehicle-mounted equipment and a storage medium.
Background
With the coming of the world energy revolution, at the present of the gradual shortage of petroleum resources, facing to the increasingly strict fuel consumption regulation, the cost of reducing the fuel consumption of the traditional pure internal combustion engine-driven vehicle is higher and higher, and the difficulty is higher and higher, and the hybrid power vehicle has great potential in reducing the fuel consumption due to the assistance of the electric motor.
At present, the P2 configuration represented by European manufacturers, the double-motor planetary gear power splitting configuration represented by Toyota and the like are mass-produced, and good fuel consumption performance is obtained, so that the P2 configuration is popular among public consumers. However, the three-clutch module with the P2 configuration and the CO motor has a complex structure and high requirements on clutch control, the double-motor planetary gear power splitting configuration is not popularized, and the three-motor control is complex. In addition, due to the fact that the working conditions of the whole vehicle are changeable, frequent engine start-stop control is involved, the existing engine start-stop control cannot achieve an ideal control effect, and clear logic control is achieved.
Disclosure of Invention
The embodiment of the invention provides an engine start-stop control method and device, vehicle-mounted equipment and a storage medium, which are used for ensuring the continuity of the engine start-stop control and timely and effectively finishing the control of the engine start-stop.
In a first aspect, an embodiment of the present invention provides an engine start-stop control method, including:
when a series driving mode request is received, controlling the engine to enter an engine dragging state and outputting a series target engine torque;
controlling an engine working point to be adjusted based on the series target engine torque, and controlling the whole vehicle to be in a series driving mode or controlling the engine to enter an engine stop state according to an adjustment result;
and if the whole vehicle is in the series driving mode or the engine enters an engine stop state, receiving a pure electric driving mode request to control the whole vehicle to be switched into the pure electric driving mode.
Further, controlling the engine to enter an engine motoring state and output a series target engine torque, includes:
after the engine is controlled to enter the engine dragging state, controlling the engine to output positive torque so as to drag the engine speed to be higher than the resonance speed;
and when the feedback timing phase of the engine controller is in a synchronous state, controlling the engine controller to execute an oil injection enabling instruction and controlling the engine to output the series target engine torque.
Further, when controlling the engine to enter the engine dragging state, the method further comprises the following steps:
and if the pure electric drive mode request is received, controlling the engine to enter the engine stop state.
Further, controlling an engine operating point to be adjusted based on the series target engine torque, and controlling the whole vehicle to be in a series driving mode or the engine to enter an engine stop state according to an adjustment result, comprising:
and controlling the current torque of the engine to be increased to the series target engine torque based on the series target engine torque, and controlling the current rotating speed of the engine to be increased to the series target engine rotating speed, and controlling the whole vehicle to be in the series driving mode if the actual torque and the actual rotating speed of the engine are kept stable.
Further, after controlling the whole vehicle to be in the series driving mode, the method further includes:
and if the pure electric drive mode request is received, controlling the working point of the engine to adjust.
Further, controlling an engine operating point to be adjusted based on the series target engine torque, and controlling the whole vehicle to be in a series driving mode or the engine to enter an engine stop state according to an adjustment result, comprising:
if the engine working point is controlled to be adjusted based on the series target engine torque, the pure electric drive mode request is received;
controlling the engine to reduce from the series target engine torque to a preset torque according to the electric-only driving mode request, and controlling the engine to enter the engine stop state.
Further, after controlling the engine to enter the engine stop state, the method further includes:
controlling the engine to execute a fuel cut-off instruction, and outputting negative torque to reduce the rotating speed of the engine until the engine stops according to the fuel cut-off instruction;
and after the engine is stopped, controlling the whole vehicle to be in the pure electric driving mode.
In a second aspect, an embodiment of the present invention further provides an engine start-stop control device, including:
the engine tractor state control module is used for controlling the engine to enter an engine tractor state and outputting a series target engine torque after receiving a series driving mode request;
the engine working point adjusting control module is used for controlling the engine working point to be adjusted based on the series target engine torque and controlling the whole vehicle to be in a series driving mode or controlling the engine to enter an engine stop state according to an adjusting result;
and the mode control module is used for receiving a pure electric drive mode request to control the whole vehicle to be switched into a pure electric drive mode if the whole vehicle is in the series drive mode or the engine enters an engine stop state.
In a third aspect, an embodiment of the present invention further provides an on-board device, where the on-board device includes:
one or more processors;
a storage device for storing a plurality of programs,
when at least one of the plurality of programs is executed by the one or more processors, the one or more processors are caused to implement the engine start-stop control method provided in the embodiment of the first aspect of the present invention.
In a fourth aspect, the embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the engine start-stop control method provided in the embodiments of the first aspect of the present invention.
According to the technical scheme of the embodiment of the invention, after a series driving mode request is received, the engine is controlled to enter an engine dragging state and output a series target engine torque; controlling an engine working point to be adjusted based on the series target engine torque, and controlling the whole vehicle to be in a series driving mode or controlling the engine to enter an engine stop state according to an adjustment result; and if the whole vehicle is in the series driving mode or the engine enters an engine stop state, receiving a pure electric driving mode request to control the whole vehicle to be switched into the pure electric driving mode. The control method solves the problems that in the prior art, due to the fact that the engine start-stop control of the whole vehicle under variable and frequent working conditions cannot achieve an ideal control effect, and clear logic control is achieved, so that the continuity of the engine start-stop control is guaranteed, and the engine start-stop control is timely and effectively completed.
Drawings
FIG. 1 is a flow chart of a method for controlling start-stop of an engine according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for controlling start-stop of an engine according to a second embodiment of the present invention;
fig. 3 is a structural diagram of an engine start-stop control device according to a third embodiment of the present invention;
fig. 4 is a schematic diagram of a hardware structure of an on-vehicle device according to a fourth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention.
It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings. Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently or simultaneously. In addition, the order of the operations may be re-arranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
Example one
Fig. 1 is a flowchart of an engine start-stop control method according to an embodiment of the present invention, which is applicable to the engine start-stop control of a hybrid vehicle with a two-motor series-parallel configuration, and the method may be executed by an engine start-stop control device, which may be implemented in software and/or hardware. The method specifically comprises the following steps:
and S110, controlling the engine to enter an engine dragging state and outputting the series target engine torque after receiving the series driving mode request.
The series driving mode request is used for requesting the whole vehicle driving mode to be switched to the series driving mode, and the series driving mode request can be sent by the whole vehicle driving mode management module.
It will be appreciated that the drive mode of the entire vehicle may be in electric-only drive mode, or the vehicle engine may be in an engine-off state, prior to receiving the series drive mode request.
Specifically, when the vehicle driving mode management module sends a serial driving mode request, the vehicle controller receives the serial driving mode request, and the vehicle controller controls the engine to enter an engine tractor state and outputs a serial target engine torque.
Further, controlling the engine to enter an engine motoring state and output a series target engine torque, includes: after the engine is controlled to enter the engine dragging state, controlling the engine to output positive torque so as to drag the engine speed to be higher than the resonance speed; and when the feedback timing phase of the engine controller is in a synchronous state, controlling the engine controller to execute an oil injection enabling instruction and controlling the engine to output the series target engine torque.
Specifically, after the engine is controlled to enter the engine dragging state, the engine is controlled to output positive torque, the engine is dragged to a higher rotating speed from a static state, in order to avoid the problem that the rotating speed of the engine generates NVH (Noise, Vibration and Harshness) of the whole vehicle in a resonance rotating speed area (the resonance rotating speed is more than 500rpm), the dragging rotating speed is generally higher than the upper limit rotating speed of the engine resonance rotating speed area; and then, after the engine timing synchronization is finished, the engine controller feeds back that the timing phase is in a synchronous state, and the vehicle control unit then sends an oil injection enabling instruction to the engine controller, and simultaneously gives a certain combustion torque to the engine to ignite and combust the engine and output the torque of the series target engine.
It can be understood that, when controlling the engine to enter the engine dragging state, the method further comprises the following steps: and if the pure electric drive mode request is received, controlling the engine to enter the engine stop state.
Specifically, when the vehicle driving mode request is converted from the pure electric driving mode to the series driving mode, before the vehicle driving mode is not entered into the series driving mode, if the vehicle driving mode request is switched to the pure electric driving mode request due to the change of the vehicle working condition, that is, when the generator is in the engine dragging state, the engine does not fully catch fire, and the engine torque is not large, so that the vehicle driving mode request can enter the engine stop state, namely, an oil cut instruction can be directly given to the engine, and then the negative torque is output through the generator to reduce the engine speed to 0 speed, so as to control the engine to enter the engine stop state.
And S120, controlling the working point of the engine to be adjusted based on the series target engine torque, and controlling the whole vehicle to be in a series driving mode or controlling the engine to enter an engine stop state according to an adjustment result.
Further, controlling an engine operating point to be adjusted based on the series target engine torque, and controlling the whole vehicle to be in a series driving mode or the engine to enter an engine stop state according to an adjustment result, comprising: and controlling the current torque of the engine to be increased to the series target engine torque based on the series target engine torque, and controlling the current rotating speed of the engine to be increased to the series target engine rotating speed, and controlling the whole vehicle to be in the series driving mode if the actual torque and the actual rotating speed of the engine are kept stable.
Specifically, after the vehicle control unit judges that the engine is successfully ignited, the generator drags the engine to output negative torque by outputting positive torque to absorb the power of the engine, the generator adjusts the current rotating speed of the engine to the series target engine rotating speed based on the current engine rotating speed and the engine torque, the vehicle control unit gradually increases the requested combustion torque of the engine to the series target engine torque while the generator outputs negative torque to adjust the rotating speed of the engine, and when the deviation between the actual rotating speed and the actual torque of the engine and the series target engine rotating speed and the deviation between the actual rotating speed and the series target engine torque are smaller than a threshold value and continue for a period of time, the vehicle.
On the basis of the above embodiment, after controlling the entire vehicle to be in the series driving mode, the method further includes: and if the pure electric drive mode request is received, controlling the working point of the engine to adjust.
Further, controlling an engine operating point to be adjusted based on the series target engine torque, and controlling the whole vehicle to be in a series driving mode or the engine to enter an engine stop state according to an adjustment result, comprising: if the engine working point is controlled to be adjusted based on the series target engine torque, the pure electric drive mode request is received; controlling the engine to reduce from the series target engine torque to a preset torque according to the electric-only driving mode request, and controlling the engine to enter the engine stop state.
Specifically, when the operating point of the engine is controlled to be adjusted based on the series target engine torque, the vehicle controller receives the pure electric drive mode request sent by the vehicle drive mode control module, that is, the engine has been completely combusted and has output a certain torque, the current target torque of the engine requested by the vehicle controller is gradually reduced from the series target engine torque to 0 torque, and when the engine torque is reduced to be lower than a preset torque (for example, 10N), the engine is considered to be successfully torque-down, and the engine enters the engine stop state.
And S130, if the whole vehicle is in the series driving mode or the engine enters an engine stop state, receiving a pure electric driving mode request to control the whole vehicle to be switched into a pure electric driving mode.
Further, after controlling the engine to enter the engine stop state, the method further includes: controlling the engine to execute a fuel cut-off instruction, and outputting negative torque to reduce the rotating speed of the engine until the engine stops according to the fuel cut-off instruction; and after the engine is stopped, controlling the whole vehicle to be in the pure electric driving mode.
Specifically, when the whole vehicle is in a series driving mode, and a pure electric driving mode request is sent by a whole vehicle driving mode management module, the rotating speed of an engine is maintained at the current rotating speed through the rotating speed control of a generator, then the torque of the engine is gradually reduced to 0 torque from the current torque, when the actual torque fed back by the engine is lower than a smaller threshold value, a whole vehicle controller sends an oil injection closing instruction to the engine, the engine outputs positive torque to maintain the current rotating speed through the generator, then the whole vehicle controller outputs negative torque through the generator to rapidly reduce the rotating speed of the engine to 0 rotating speed, when the rotating speed of the engine is close to the 0 rotating speed and lasts for a period of time, the engine is considered to be stopped, and the whole vehicle enters the pure electric driving.
It should be noted that, in the process of switching the vehicle driving mode request from the series driving mode to the pure electric driving mode, before entering the pure electric driving mode, if the vehicle driving mode request is switched to the series driving mode due to a change of the vehicle operating condition, that is, the series driving mode is switched to the pure electric driving mode. If the generator stabilizes the engine speed at the current speed through speed control, the engine torque is gradually reduced from the current torque to 0 torque, at the moment, if the series driving mode is requested, the engine torque is directly and gradually transited from the current torque to the series target engine torque, and after the engine torque climbs to be close to the series target engine torque, the engine torque returns to the series driving mode again; if the engine is cut off and the generator pulls down the engine speed, then the engine speed must be dragged to a certain value again by the generator if the engine is to be started again, so that the engine dragging state needs to be entered first, and then the process of adjusting the engine working point needs to be entered, so that the series driving mode is entered again.
According to the technical scheme of the embodiment of the invention, after a series driving mode request is received, the engine is controlled to enter an engine dragging state and output a series target engine torque; controlling an engine working point to be adjusted based on the series target engine torque, and controlling the whole vehicle to be in a series driving mode or controlling the engine to enter an engine stop state according to an adjustment result; and if the whole vehicle is in the series driving mode or the engine enters an engine stop state, receiving a pure electric driving mode request to control the whole vehicle to be switched into the pure electric driving mode. The control method solves the problems that in the prior art, due to the fact that the engine start-stop control of the whole vehicle under variable and frequent working conditions cannot achieve an ideal control effect, and clear logic control is achieved, so that the continuity of the engine start-stop control is guaranteed, and the engine start-stop control is timely and effectively completed.
Example two
Fig. 2 is a flowchart of an engine start-stop control method according to a second embodiment of the present invention. The present embodiment is optimized based on the above embodiments.
Correspondingly, the method of the embodiment specifically includes:
the engine starting is divided into two stages.
The engine is started up in the first stage: and controlling the engine tractor. When the whole vehicle driving mode control module sends a series driving mode request, the whole vehicle controller outputs positive torque through the generator to increase the rotating speed of the engine to be higher than the resonance rotating speed (the resonance rotating speed is higher than 500rpm), after the engine completes timing synchronization, the whole vehicle controller sends an oil injection enabling instruction to the engine, the torque requested by the engine is gradually increased to the series target engine torque from 0, after the engine ignites and burns and outputs the series target engine torque, the engine is considered to be dragged successfully, namely the engine burns successfully, the engine dragging control is finished, and the engine starting second stage is entered.
The second engine starting stage: and adjusting the working point of the engine. When the whole vehicle driving mode control module is requested to be in a series driving mode, the target torque of the engine requested by the whole vehicle controller is increased from the current torque to the target torque of the engine in series, the generator controls the rotating speed and controls the target rotating speed of the engine to the target rotating speed of the engine in series, when the absolute value of the deviation between the rotating speed of the engine and the target rotating speed of the engine in series is less than 50rpm, the absolute value of the deviation between the torque of the engine and the target torque in series is less than 20Nm, and the stable rotating speed torque of the engine and the stable state of the engine exceed 0.2 second, the working point of the engine is considered to; when the vehicle driving mode control module is a pure electric driving mode request, the target torque of the engine requested by the vehicle controller is gradually reduced from the current torque to 0 torque, the generator performs rotation speed control and controls the target rotation speed of the engine to the current rotation speed of the engine, when the torque of the engine is reduced to be below 10N, the load of the engine is considered to be successfully reduced, and the second stage of stopping the engine is entered.
The engine shutdown is divided into two phases.
Engine shutdown first stage: and adjusting the working point of the engine. When the whole vehicle driving mode control module sends a pure electric driving mode request, the torque of the engine is gradually reduced from the current torque to 0 torque, and the rotating speed of the engine is stabilized on the current rotating speed by the generator while the torque of the engine is reduced, namely the torque of the engine is reduced while the rotating speed of the engine is kept unchanged; when the actual torque of the engine is lower than a smaller threshold value, the vehicle control unit sends an oil cut-off signal to the engine, and when the engine feeds back the oil cut-off state, the vehicle control unit enters the second stage of stopping the engine.
And a second stage of engine stop: an engine off state. When the second stage of engine stop is entered, the vehicle control unit continuously sends a fuel cut-off command to the engine, the engine is in a fuel cut-off state, the generator outputs negative torque to rapidly reduce the rotating speed of the engine, so that the rotating speed of the engine rapidly passes through a low-speed resonance region, when the rotating speed of the engine is reduced to be close to 0 rotating speed, the generator outputs 0 torque, when the rotating speed of the engine is continuously over a period of time close to 0 rotating speed, the engine is stopped, and the whole vehicle enters a pure electric drive mode.
Further, when the entire vehicle driving mode is the pure electric driving mode, when the entire vehicle driving mode request is the series driving mode, the engine tractor control is executed first, after the engine is ignited and combusted, the engine working point adjustment control is entered, finally the engine rotating speed and the torque are controlled at the series target engine rotating speed and torque working point, and the entire vehicle enters the series driving mode.
When the whole vehicle driving mode is the series driving mode, when the whole vehicle driving mode request is the pure electric driving mode, the engine working point adjustment control is executed firstly, the rotating speed of the engine is controlled on the current rotating speed by the generator through rotating speed control, the torque of the engine is gradually reduced to 0N, when the torque of the engine is reduced to be close to 0 torque, the torque reduction of the engine is considered to be successful, the engine stop control is started, the rotating speed of the engine is reduced by the generator through outputting negative torque, when the rotating speed of the engine is reduced to be close to 0, the engine stop is considered to be completed, and the whole vehicle enters the pure electric driving mode.
When the whole vehicle driving mode is in the process of switching from the pure electric driving mode to the series driving mode, when the engine tractor control is executed, if the whole vehicle driving mode request is changed into the pure electric driving mode request, the engine stop control is executed; when the engine working point adjusting control is executed, if the whole vehicle driving mode request is changed into the pure electric driving mode request, the engine working point adjusting control is still executed firstly, the engine load is reduced firstly, and then the engine stopping control is started.
When the whole vehicle driving mode is in the process of switching from the series driving mode to the pure electric driving mode, when the adjustment control of the working point of the engine is executed, if the request of the whole vehicle driving mode is changed into the request of the series driving mode, the adjustment control of the working point of the engine is continuously executed, and only the target rotating speed and the load of the engine are required to be adjusted to the rotating speed and the torque of the series target engine; when the engine stop control is executed, if the whole vehicle driving mode request is changed into the series driving mode request, the engine dragging control is executed firstly, and the engine working point adjustment control is entered after the engine is ignited and combusted.
According to the technical scheme of the embodiment of the invention, the starting process of the engine is divided into two stages through the analysis of the starting and stopping process of the engine, and the stopping process is also divided into two stages, so that the control target is realized, the software structure is simplified, and the understanding and the application of a software model are facilitated; meanwhile, the starting and stopping process of the engine is simplified, the logic jump can be well completed for the switching operation of the pure electric drive mode and the series drive mode in the starting and stopping process, and the superiority of software function module division is also proved.
EXAMPLE III
Fig. 3 is a structural diagram of an engine start-stop control device according to a third embodiment of the present invention, which is applicable to the case of engine start-stop control of a hybrid vehicle with a two-motor series-parallel configuration.
As shown in fig. 3, the apparatus includes: an engine tow-in state control module 310, an engine operating point adjustment control module 320, and a mode control module 330, wherein:
an engine tow-up state control module 310, configured to control the engine to enter an engine tow-up state and output a series target engine torque after receiving the series driving mode request;
the engine working point adjusting control module 320 is used for controlling the engine working point to be adjusted based on the series target engine torque and controlling the whole vehicle to be in a series driving mode or controlling the engine to enter an engine stop state according to an adjusting result;
and the mode control module 330 is configured to receive a pure electric drive mode request to control the entire vehicle to be switched to a pure electric drive mode if the entire vehicle is in the series drive mode or the engine enters an engine stop state.
The engine start-stop control device of the embodiment controls the engine to enter an engine dragging state and output a series target engine torque when receiving a series driving mode request; controlling an engine working point to be adjusted based on the series target engine torque, and controlling the whole vehicle to be in a series driving mode or controlling the engine to enter an engine stop state according to an adjustment result; and if the whole vehicle is in the series driving mode or the engine enters an engine stop state, receiving a pure electric driving mode request to control the whole vehicle to be switched into the pure electric driving mode. The control method solves the problems that in the prior art, due to the fact that the engine start-stop control of the whole vehicle under variable and frequent working conditions cannot achieve an ideal control effect, and clear logic control is achieved, so that the continuity of the engine start-stop control is guaranteed, and the engine start-stop control is timely and effectively completed.
On the basis of the above embodiments, controlling the engine to enter the engine motoring state and output the series target engine torque includes:
after the engine is controlled to enter the engine dragging state, controlling the engine to output positive torque so as to drag the engine speed to be higher than the resonance speed;
and when the feedback timing phase of the engine controller is in a synchronous state, controlling the engine controller to execute an oil injection enabling instruction and controlling the engine to output the series target engine torque.
On the basis of the above embodiments, when controlling the engine to enter the engine towing state, the method further includes:
and if the pure electric drive mode request is received, controlling the engine to enter the engine stop state.
On the basis of the above embodiments, controlling the engine operating point to adjust based on the series target engine torque, and controlling the entire vehicle to be in the series driving mode or the engine to enter the engine stop state according to the result of the adjustment includes:
and controlling the current torque of the engine to be increased to the series target engine torque based on the series target engine torque, and controlling the current rotating speed of the engine to be increased to the series target engine rotating speed, and controlling the whole vehicle to be in the series driving mode if the actual torque and the actual rotating speed of the engine are kept stable.
On the basis of the above embodiments, after controlling the entire vehicle to be in the series driving mode, the method further includes:
and if the pure electric drive mode request is received, controlling the working point of the engine to adjust.
On the basis of the above embodiments, controlling the engine operating point to adjust based on the series target engine torque, and controlling the entire vehicle to be in the series driving mode or the engine to enter the engine stop state according to the result of the adjustment includes:
if the engine working point is controlled to be adjusted based on the series target engine torque, the pure electric drive mode request is received;
controlling the engine to reduce from the series target engine torque to a preset torque according to the electric-only driving mode request, and controlling the engine to enter the engine stop state.
On the basis of the above embodiments, after controlling the engine to enter the engine stop state, the method further includes:
controlling the engine to execute a fuel cut-off instruction, and outputting negative torque to reduce the rotating speed of the engine until the engine stops according to the fuel cut-off instruction;
and after the engine is stopped, controlling the whole vehicle to be in the pure electric driving mode.
The engine start-stop control device provided by each embodiment can execute the engine start-stop control method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of executing the engine start-stop control method.
Example four
Fig. 4 is a schematic structural diagram of a computer apparatus according to a fourth embodiment of the present invention, as shown in fig. 4, the computer apparatus includes a processor 410, a memory 420, an input device 430, and an output device 440; the number of the processors 410 in the computer device may be one or more, and one processor 410 is taken as an example in fig. 4; the processor 410, the memory 420, the input device 430 and the output device 440 in the computer apparatus may be connected by a bus or other means, and the connection by the bus is exemplified in fig. 4.
The memory 420, which may be a computer-readable storage medium, may be used to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the engine start-stop control methods in embodiments of the present invention (e.g., the engine motoring state control module 310, the engine operating point adjustment control module 320, and the mode control module 330 of the engine start-stop control apparatus). The processor 410 executes various functional applications of the computer device and data processing by executing software programs, instructions and modules stored in the memory 420, namely, implements the engine start-stop control method described above.
The memory 420 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 420 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, memory 420 may further include memory located remotely from processor 410, which may be connected to a computer device through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 430 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the computer apparatus. The output device 440 may include a display device such as a display screen.
EXAMPLE five
Embodiments of the present invention also provide a storage medium containing computer-executable instructions, which when executed by a computer processor, perform a method for engine start-stop control, the method comprising:
when a series driving mode request is received, controlling the engine to enter an engine dragging state and outputting a series target engine torque;
controlling an engine working point to be adjusted based on the series target engine torque, and controlling the whole vehicle to be in a series driving mode or controlling the engine to enter an engine stop state according to an adjustment result;
and if the whole vehicle is in the series driving mode or the engine enters an engine stop state, receiving a pure electric driving mode request to control the whole vehicle to be switched into the pure electric driving mode.
Of course, the storage medium containing the computer-executable instructions provided by the embodiments of the present invention is not limited to the method operations described above, and may also perform related operations in the engine start-stop control method provided by any embodiments of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the above-mentioned embodiment of the engine start-stop control device, the included units and modules are merely divided according to the functional logic, but are not limited to the above division as long as the corresponding functions can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An engine start-stop control method, characterized by comprising:
when a series driving mode request is received, controlling the engine to enter an engine dragging state and outputting a series target engine torque;
controlling an engine working point to be adjusted based on the series target engine torque, and controlling the whole vehicle to be in a series driving mode or controlling the engine to enter an engine stop state according to an adjustment result;
and if the whole vehicle is in the series driving mode or the engine enters an engine stop state, receiving a pure electric driving mode request to control the whole vehicle to be switched into the pure electric driving mode.
2. The method of claim 1, wherein controlling the engine to enter an engine motoring state and output a series target engine torque comprises:
after the engine is controlled to enter the engine dragging state, controlling the engine to output positive torque so as to drag the engine speed to be higher than the resonance speed;
and when the feedback timing phase of the engine controller is in a synchronous state, controlling the engine controller to execute an oil injection enabling instruction and controlling the engine to output the series target engine torque.
3. The method of claim 1, further comprising, while controlling the engine to enter the engine motoring state:
and if the pure electric drive mode request is received, controlling the engine to enter the engine stop state.
4. The method of claim 1, wherein controlling an engine operating point to adjust based on the series target engine torque and controlling the entire vehicle to be in a series drive mode or the engine to enter an engine off state according to a result of the adjusting comprises:
and controlling the current torque of the engine to be increased to the series target engine torque based on the series target engine torque, and controlling the current rotating speed of the engine to be increased to the series target engine rotating speed, and controlling the whole vehicle to be in the series driving mode if the actual torque and the actual rotating speed of the engine are kept stable.
5. The method of claim 4, further comprising, after controlling the vehicle in the series drive mode:
and if the pure electric drive mode request is received, controlling the working point of the engine to adjust.
6. The method of claim 1, wherein controlling an engine operating point to adjust based on the series target engine torque and controlling the entire vehicle to be in a series drive mode or the engine to enter an engine off state according to a result of the adjusting comprises:
if the engine working point is controlled to be adjusted based on the series target engine torque, the pure electric drive mode request is received;
controlling the engine to reduce from the series target engine torque to a preset torque according to the electric-only driving mode request, and controlling the engine to enter the engine stop state.
7. The method of claim 6, further comprising, after controlling the engine to enter the engine-off state:
controlling the engine to execute a fuel cut-off instruction, and outputting negative torque to reduce the rotating speed of the engine until the engine stops according to the fuel cut-off instruction;
and after the engine is stopped, controlling the whole vehicle to be in the pure electric driving mode.
8. An engine start-stop control device characterized by comprising:
the engine tractor state control module is used for controlling the engine to enter an engine tractor state and outputting a series target engine torque after receiving a series driving mode request;
the engine working point adjusting control module is used for controlling the engine working point to be adjusted based on the series target engine torque and controlling the whole vehicle to be in a series driving mode or controlling the engine to enter an engine stop state according to an adjusting result;
and the mode control module is used for receiving a pure electric drive mode request to control the whole vehicle to be switched into a pure electric drive mode if the whole vehicle is in the series drive mode or the engine enters an engine stop state.
9. An in-vehicle apparatus characterized by comprising:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the engine start-stop control method of any one of claims 1-7.
10. A computer-readable storage medium on which a computer program is stored, the program, when executed by a processor, implementing an engine start-stop control method according to any one of claims 1-7.
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| CN202010544676.2A CN111661031B (en) | 2020-06-15 | 2020-06-15 | Engine start-stop control method and device, vehicle-mounted equipment and storage medium |
| PCT/CN2021/100000 WO2021254306A1 (en) | 2020-06-15 | 2021-06-15 | Engine starting/stopping control method and apparatus, and vehicle-mounted device and storage medium |
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| CN202010544676.2A CN111661031B (en) | 2020-06-15 | 2020-06-15 | Engine start-stop control method and device, vehicle-mounted equipment and storage medium |
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| WO2021254306A1 (en) * | 2020-06-15 | 2021-12-23 | 中国第一汽车股份有限公司 | Engine starting/stopping control method and apparatus, and vehicle-mounted device and storage medium |
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| CN111661031B (en) | 2021-10-15 |
| WO2021254306A1 (en) | 2021-12-23 |
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