CN112377314B - Hybrid special engine control method, device, device and readable storage medium - Google Patents
Hybrid special engine control method, device, device and readable storage medium Download PDFInfo
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- CN112377314B CN112377314B CN202011074665.9A CN202011074665A CN112377314B CN 112377314 B CN112377314 B CN 112377314B CN 202011074665 A CN202011074665 A CN 202011074665A CN 112377314 B CN112377314 B CN 112377314B
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000002485 combustion reaction Methods 0.000 claims abstract description 54
- 238000010248 power generation Methods 0.000 claims abstract description 26
- 239000000203 mixture Substances 0.000 claims abstract description 17
- 230000001133 acceleration Effects 0.000 claims description 13
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 239000000446 fuel Substances 0.000 abstract description 10
- 238000009841 combustion method Methods 0.000 abstract description 4
- 230000001960 triggered effect Effects 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 description 10
- 239000007789 gas Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 230000002269 spontaneous effect Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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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
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/60—Input parameters for engine control said parameters being related to the driver demands or status
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- Engineering & Computer Science (AREA)
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
本发明提供一种混动专用发动机控制方法、装置、设备及可读存储介质。该方法包括：当纯发电模式开启或直接驱动车辆运行模式开启时，调整发动机的转速以及负荷，使得调整后的转速以及负荷处于火花点火激发混合气自燃着火SIAI区域；控制发动机以SIAI的燃烧方式工作。通过本发明，在调整后的转速以及负荷处于火花点火激发混合气自燃着火SIAI区域时，才控制发动机以SIAI的燃烧方式工作，避免了混动专用发动机采用SIAI燃烧方式发生燃烧不稳定以及爆震的情况，且相较于采用SI燃烧方式，燃油经济性更佳。
The present invention provides a hybrid dedicated engine control method, device, device and readable storage medium. The method includes: when the pure power generation mode is turned on or the direct drive vehicle operating mode is turned on, adjusting the speed and load of the engine, so that the adjusted speed and load are in the SIAI region of the self-ignition SIAI region of the air-fuel mixture triggered by spark ignition; controlling the engine to use the SIAI combustion method Work. Through the invention, the engine is controlled to work in the SIAI combustion mode only when the adjusted rotational speed and the load are in the SIAI region of the self-ignition of the air-fuel mixture excited by the spark ignition, thereby avoiding combustion instability and knocking in the SIAI combustion mode of the special hybrid engine. and the fuel economy is better than that of SI combustion.
Description
Technical Field
The invention relates to the field of data processing, in particular to a hybrid special engine control method, a hybrid special engine control device, hybrid special engine control equipment and a readable storage medium.
Background
At present, the combustion mode commonly used by gasoline engines is Spark Ignition (SI), but the fuel economy of the mode is poor. In order to improve fuel economy, a spark-ignition-stimulated mixture auto-ignition SIAI combustion mode is proposed. However, the SIAI combustion method cannot achieve stable compression ignition in a low load region, and has a problem of knocking in a high load region.
Disclosure of Invention
The invention mainly aims to provide a hybrid special engine control method, a hybrid special engine control device, hybrid special engine control equipment and a readable storage medium, and aims to solve the technical problems that an SIAI combustion mode is unstable and knocks in the prior art.
In a first aspect, the present invention provides a hybrid-dedicated engine control method including:
when the pure power generation mode is started or the direct drive vehicle running mode is started, adjusting the rotating speed and the load of the engine to enable the adjusted rotating speed and the adjusted load to be in a spark ignition stimulated gas mixture spontaneous combustion ignition SIAI area;
the engine is controlled to operate in a combustion mode of SIAI.
Optionally, before the step when the pure power generation mode is turned on or the direct drive vehicle operation mode is turned on, the method further includes:
when the residual electric quantity of the battery is smaller than a preset electric quantity value, starting a pure power generation mode;
or
And when the vehicle speed is greater than the preset vehicle speed and the acceleration is greater than the preset acceleration, starting a direct drive vehicle running mode.
Alternatively, the engine output torque is fully absorbed by the generator in the pure power generation mode, and the engine output torque is equal to the generator absorption torque.
Optionally, after the step of controlling the engine to operate in the combustion mode of the SIAI, the method further includes:
and when the rotating speed of the engine is reduced to a start-stop boundary rotating speed or the power demand of the vehicle is reduced, controlling the clutch to be in a disengaged state, and controlling the engine to continuously work in a combustion mode of SIAI (diesel engine interface), wherein the start-stop boundary rotating speed is determined according to the engine universal characteristic test.
Optionally, after the step of controlling the engine to operate in the combustion mode of the SIAI, the method further includes:
when the vehicle power demand is increased, the intake and exhaust lift and phase are adjusted, and the engine is controlled to work in the combustion mode of SI.
In a second aspect, the present invention also provides a hybrid-dedicated engine control device including:
the adjusting module is used for adjusting the rotating speed and the load of the engine when the pure power generation mode is started or the direct drive vehicle running mode is started, so that the adjusted rotating speed and the adjusted load are in a spark ignition stimulated gas mixture spontaneous combustion ignition SIAI area;
the control module is used for controlling the engine to work in a combustion mode of SIAI.
In a third aspect, the present invention also provides a hybrid-dedicated engine control apparatus comprising a processor, a memory, and a hybrid-dedicated engine control program stored on the memory and executable by the processor, wherein the hybrid-dedicated engine control program, when executed by the processor, implements the steps of the hybrid-dedicated engine control method as described above.
In a fourth aspect, the present invention also provides a readable storage medium having stored thereon a hybrid specific engine control program, wherein the hybrid specific engine control program, when executed by a processor, implements the steps of the hybrid specific engine control method as described above.
According to the method, when a pure power generation mode is started or a direct drive vehicle running mode is started, the rotating speed and the load of an engine are adjusted, so that the adjusted rotating speed and the adjusted load are in a spark ignition stimulated gas mixture autoignition ignition SIAI (diesel engine automatic ignition) region; the engine is controlled to operate in a combustion mode of SIAI. According to the invention, when the adjusted rotating speed and load are in the SIAI area where the spark ignition stimulates the gas mixture to spontaneously ignite and catch fire, the engine is controlled to work in the SIAI combustion mode, so that the conditions of unstable combustion and detonation caused by the SIAI combustion mode adopted by the special hybrid engine are avoided, and the fuel economy is better compared with that of the SI combustion mode.
Drawings
Fig. 1 is a schematic diagram of a hardware configuration of a hybrid dedicated engine control device according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a method for controlling a hybrid specialized engine according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating the operation of the hybrid specialized engine with zone division according to an embodiment;
fig. 4 is a functional block diagram of an embodiment of the hybrid dedicated engine control device according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In a first aspect, an embodiment of the present invention provides a hybrid-dedicated engine control apparatus.
Referring to fig. 1, fig. 1 is a schematic diagram of a hardware structure of a hybrid dedicated engine control device according to an embodiment of the present invention. In this embodiment of the present invention, the hybrid-dedicated engine control device may include a processor 1001 (e.g., a Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used for realizing connection communication among the components; the user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard); the network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WI-FI interface, WI-FI interface); the memory 1005 may be a Random Access Memory (RAM) or a non-volatile memory (non-volatile memory), such as a magnetic disk memory, and the memory 1005 may optionally be a storage device independent of the processor 1001. Those skilled in the art will appreciate that the hardware configuration depicted in FIG. 1 is not intended to be limiting of the present invention, and may include more or less components than those shown, or some components in combination, or a different arrangement of components.
With continued reference to FIG. 1, the memory 1005 of FIG. 1, which is one type of computer storage medium, may include an operating system, a network communication module, a user interface module, and a hybrid specific engine control program. The processor 1001 may call the hybrid-dedicated engine control program stored in the memory 1005, and execute the hybrid-dedicated engine control method according to the embodiment of the present invention.
In a second aspect, an embodiment of the present invention provides a control method for a hybrid special engine.
Referring to fig. 2, fig. 2 is a schematic flow chart of an embodiment of a hybrid special engine control method according to the present invention. In one embodiment, a hybrid specific engine control method comprises:
step S10, when the pure power generation mode is started or the direct drive vehicle running mode is started, adjusting the rotating speed and the load of the engine to enable the adjusted rotating speed and the adjusted load to be in a spark ignition stimulated gas mixture auto-ignition SIAI area;
in this embodiment, the hybrid special engine is connected to the differential via a clutch. The system is configured to drive a motor and a generator. The rotation speed control of the hybrid special engine can not be limited by the vehicle speed. The hybrid special engine is provided with a spark plug ignition system, an air intake and exhaust VVT and a valve stroke adjustable VVL system.
The spark-ignition-stimulated mixture auto-ignition siei region was determined at the time of hybrid-specific engine development. Referring to fig. 3, fig. 3 is a schematic diagram illustrating the division of the operation condition of the hybrid special engine according to an embodiment. As shown in fig. 3, five regions of S1, S2, S3, S4, and S5 were determined in the development of the hybrid-dedicated engine. Wherein:
s1 is a start/stop region, that is, when the coordinates corresponding to the average effective pressure (i.e., the engine load) of the hybrid special engine and the rotation speed of the hybrid special engine are in the S1 region, the engine stops running, and the engine is driven to run by the driving motor.
The S2 region and the S5 region are spark ignition SI regions, i.e., when the coordinates corresponding to the average effective pressure (i.e., the engine load) of the hybrid-dedicated engine and the rotation speed of the hybrid-dedicated engine are located in the S2 or S5 region, it is said that the hybrid engine load is small and stable compression ignition cannot be achieved even by spark plug ignition, and therefore the hybrid-dedicated engine is controlled to operate in the SI combustion mode.
The area S3 is an SIAI area, and when the coordinates corresponding to the average effective pressure (i.e., the engine load) of the hybrid special engine and the rotation speed of the hybrid special engine are located in the area S3, it indicates that the current load of the hybrid special engine is not low or high, and the hybrid special engine is controlled to adopt an SIAI combustion method, so that unstable combustion and knocking do not occur, and the fuel economy is better than that of an SI combustion method.
The region S4 is the SI spark ignition SI region because the ratio of the air-fuel mixture ignited and burned in the SIAI combustion mode gradually decreases and the ratio of the air-fuel mixture compressed and burned gradually increases with an increase in load, and when the ratio increases to a certain extent, the in-cylinder pressure increase rate and the combustion noise exceed the prescribed limits. In order to ensure that the pressure rise rate and the combustion noise of the hybrid special engine are controlled at a reasonable level, the residual waste gas amount in a cylinder is reduced and the air inflow of fresh air is increased through the optimization of an air inlet and outlet camshaft, so that the compression end point temperature is reduced, namely when the average effective pressure (namely the engine load) of the hybrid special engine and a coordinate corresponding to the rotating speed of the hybrid special engine are located in an S4 area, the hybrid special engine is controlled to adopt an SI combustion mode.
When the pure power generation mode is started or the direct drive vehicle running mode is started, the rotation speed and the load of the engine are adjusted, so that the adjusted rotation speed and the adjusted load are in a spark ignition stimulated gas mixture self-ignition SIAI region, namely coordinates corresponding to the adjusted rotation speed and the adjusted load are in a region S3. The specific adjusting process is as follows: the clutch is kept disengaged, the generator drags the special engine for mixing to the N1 rotating speed, then the engine ignition is controlled by the engine control system, and the engine torque is gradually increased, so that the coordinates corresponding to the adjusted rotating speed and the load are in the S3 area.
In step S20, the engine is controlled to operate in the SIAI combustion mode.
In the present embodiment, after the speed and load are adjusted based on step S10, the engine is controlled to operate in the SIAI combustion mode.
In the embodiment, when the pure power generation mode is started or the direct drive vehicle running mode is started, the rotating speed and the load of the engine are adjusted, so that the adjusted rotating speed and the adjusted load are in a spark ignition stimulated gas mixture spontaneous combustion ignition SIAI area; the engine is controlled to operate in a combustion mode of SIAI. According to the embodiment, when the adjusted rotating speed and load are in the SIAI area where the spark ignition stimulates the gas mixture to be ignited by self combustion, the engine is controlled to work in the SIAI combustion mode, so that the situations that the combustion of the special hybrid engine is unstable and knocks when the SIAI combustion mode is adopted are avoided, and the fuel economy is better compared with that when the SI combustion mode is adopted.
Further, in an embodiment, before the step S10, the method further includes:
when the residual electric quantity of the battery is smaller than a preset electric quantity value, starting a pure power generation mode;
or
And when the vehicle speed is greater than the preset vehicle speed and the acceleration is greater than the preset acceleration, starting a direct drive vehicle running mode.
In this embodiment, the preset electric quantity value, the preset vehicle speed and the preset acceleration are all set according to actual needs.
And when the residual electric quantity of the battery is smaller than the preset electric quantity value, starting a pure power generation mode. When the pure power generation mode is started, the engine speed and the load are adjusted based on step S10. Further, in the pure power generation mode, the generator needs to be controlled, so that the output torque of the engine is completely absorbed by the generator, and the output torque of the engine is equal to the absorption torque of the generator, and better NVH (Noise, Vibration and Harshness) performance can be obtained.
And when the vehicle speed is greater than the preset vehicle speed and the acceleration is greater than the preset acceleration, starting a direct drive vehicle running mode. Once the direct drive vehicle operating mode is enabled, the engine speed and load are adjusted based on step S10. Further, under the running mode of the direct-drive vehicle, the speed of the generator is regulated, so that the rotating speeds of two ends of the clutch are equal.
Further, in an embodiment, after step S20, the method further includes:
and when the rotating speed of the engine is reduced to a start-stop boundary rotating speed or the power demand of the vehicle is reduced, controlling the clutch to be in a disengaged state, and controlling the engine to continuously work in a combustion mode of SIAI (diesel engine interface), wherein the start-stop boundary rotating speed is determined according to the engine universal characteristic test.
In the embodiment, the engine operates in the combustion mode of the SIAI, when the engine speed is reduced to the start-stop boundary speed, in order to avoid that the engine speed is continuously reduced and the engine operating condition is no longer in the region of S3, the clutch needs to be controlled to be in the disengaged state, so that the engine operating condition is still in the region of S3, and the engine is controlled to continuously operate in the combustion mode of the SIAI. At the moment, the generator is in a power generation state, and when the residual electric quantity of the battery reaches a set value, the engine stops running.
When the power demand of the vehicle is reduced, the load of the engine is reduced, in order to avoid that the engine working condition is no longer in the region of S3 due to the reduced load, the clutch is controlled to be in a disengaged state, so that the working condition of the engine is still in the region of S3, and the engine is controlled to continue to work in a combustion mode of SIAI. At the moment, the generator is in a power generation state, and when the residual electric quantity of the battery reaches a set value, the engine stops running. Wherein an increase or decrease in the vehicle power demand can be judged according to the vehicle speed change. And if the value of the increase of the vehicle speed in the unit time is greater than the preset value, determining that the power demand of the vehicle is increased, and if the value of the decrease of the vehicle speed in the unit time is greater than the preset value, determining that the power demand of the vehicle is decreased.
Further, in an embodiment, after step S20, the method further includes:
when the vehicle power demand is increased, the intake and exhaust lift and phase are adjusted, and the engine is controlled to work in the combustion mode of SI.
In the embodiment, when the power demand of the vehicle is increased, the load of the engine is increased, the working condition of the vehicle is changed from the region S3 to the region S4, the load of the engine is higher, and if the SIAI combustion mode is adopted, the knocking phenomenon can occur, so that the intake and exhaust lift and phase are adjusted, and the engine is controlled to work in the SI combustion mode.
In the embodiment, under different working conditions, the engine adopts different combustion modes, so that the stable operation of the engine is ensured.
In a third aspect, an embodiment of the present invention further provides a hybrid dedicated engine control device.
Referring to fig. 4, fig. 4 is a functional block diagram of an embodiment of the hybrid dedicated engine control device of the present invention. As shown in fig. 4, in one embodiment, the hybrid-dedicated engine control device includes:
the adjusting module 10 is used for adjusting the rotating speed and the load of the engine when the pure power generation mode is started or the direct drive vehicle running mode is started, so that the adjusted rotating speed and the adjusted load are in a spark ignition stimulated gas mixture spontaneous combustion ignition SIAI area;
a control module 20 controls the engine to operate in a SIAI combustion mode.
Further, in an embodiment, the hybrid specific engine control apparatus further includes an opening module configured to:
when the residual electric quantity of the battery is smaller than a preset electric quantity value, starting a pure power generation mode;
or
And when the vehicle speed is greater than the preset vehicle speed and the acceleration is greater than the preset acceleration, starting a direct drive vehicle running mode.
Further, in one embodiment, the engine output torque is fully absorbed by the generator in the pure power generation mode, and the engine output torque is equal to the generator absorption torque.
Further, in an embodiment, the control module 20 is further configured to:
and when the rotating speed of the engine is reduced to a start-stop boundary rotating speed or the power demand of the vehicle is reduced, controlling the clutch to be in a disengaged state, and controlling the engine to continuously work in a combustion mode of SIAI (diesel engine interface), wherein the start-stop boundary rotating speed is determined according to the engine universal characteristic test.
Further, in an embodiment, the control module 20 is further configured to:
when the vehicle power demand is increased, the intake and exhaust lift and phase are adjusted, and the engine is controlled to work in the combustion mode of SI.
The function of each module in the hybrid special engine control device is implemented corresponding to each step in the hybrid special engine control method embodiment, and the functions and implementation processes are not described in detail herein.
In a fourth aspect, the embodiment of the present invention further provides a readable storage medium.
The readable storage medium of the present invention stores a hybrid specific engine control program, wherein the hybrid specific engine control program, when executed by a processor, implements the steps of the hybrid specific engine control method as described above.
The method implemented when the hybrid-dedicated engine control program is executed may refer to various embodiments of the hybrid-dedicated engine control method of the present invention, and will not be described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system 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 system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system 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.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for causing a terminal device to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
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| CN113806991B (en) * | 2021-11-17 | 2022-02-22 | 天津仁爱学院 | Engine combustion noise optimization prediction method and device and storage medium |
| CN115263589A (en) * | 2022-07-20 | 2022-11-01 | 东风汽车集团股份有限公司 | An engine control method and control system |
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| US7867133B2 (en) * | 2006-02-10 | 2011-01-11 | Ford Global Technologies, Llc | Increased loading to improve low load controlled auto-ignition operation |
| CN101357633B (en) * | 2007-07-31 | 2011-05-18 | 比亚迪股份有限公司 | Driving method and system of tandem type hybrid vehicle |
| JP5105064B2 (en) * | 2008-01-17 | 2012-12-19 | 三菱自動車工業株式会社 | Control device for hybrid vehicle |
| CN101619670B (en) * | 2009-01-20 | 2011-12-28 | 清华大学 | Gasoline engine spark ignition excitation homogeneous compression ignition combustion and control method |
| CN103847492B (en) * | 2012-11-29 | 2017-07-25 | 上海汽车集团股份有限公司 | Hybrid system, method and vehicle based on dual-mode homogeneous compression ignition internal combustion engine |
| CN104421089B (en) * | 2013-09-11 | 2016-08-10 | 上海汽车集团股份有限公司 | Engine starting system and method for hybrid electric vehicle |
| JP6589971B2 (en) * | 2017-12-15 | 2019-10-16 | マツダ株式会社 | Control device for compression ignition engine |
| CN108382186B (en) * | 2018-02-09 | 2020-09-22 | 浙江吉利控股集团有限公司 | Hybrid hybrid power system and vehicle working mode decision-making method |
| CN110080887A (en) * | 2019-04-17 | 2019-08-02 | 天津大学 | A kind of compound combustion control method of engine |
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