CN117189386A - Engine control method, medium, electronic device and hybrid vehicle - Google Patents
Engine control method, medium, electronic device and hybrid vehicle Download PDFInfo
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- CN117189386A CN117189386A CN202210602398.0A CN202210602398A CN117189386A CN 117189386 A CN117189386 A CN 117189386A CN 202210602398 A CN202210602398 A CN 202210602398A CN 117189386 A CN117189386 A CN 117189386A
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000004945 emulsification Methods 0.000 claims abstract description 183
- 239000003921 oil Substances 0.000 claims abstract description 120
- 239000010705 motor oil Substances 0.000 claims abstract description 85
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 230000000875 corresponding effect Effects 0.000 claims description 23
- 230000002265 prevention Effects 0.000 claims description 17
- 239000000498 cooling water Substances 0.000 claims description 14
- 239000000839 emulsion Substances 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 9
- 239000010721 machine oil Substances 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 6
- 230000002596 correlated effect Effects 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000003111 delayed effect Effects 0.000 description 14
- 230000001804 emulsifying effect Effects 0.000 description 14
- 230000006870 function Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000003491 array Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000014759 maintenance of location Effects 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
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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
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The invention discloses an engine control method, a medium, electronic equipment and a hybrid vehicle, wherein the engine control method comprises the following steps: determining the oil emulsification level of an engine; and obtaining a corresponding start-stop strategy according to the engine oil emulsification grade, and controlling the start-stop of the engine according to the start-stop strategy. When the engine is controlled to start and stop, the engine is controlled to start and stop according to a corresponding start and stop strategy by determining the oil emulsification level in the current engine, a user decision is not needed, and the intelligent degree of controlling the start and stop of the engine is improved; according to the engine oil emulsification grade of the engine, the engine is controlled to execute a corresponding start-stop strategy, so that parts inside the engine can be protected, the damage of the parts of the engine caused by the internal engine oil emulsification problem is prevented, and the service life of the engine is prolonged; according to the engine oil emulsification level of the engine, a corresponding start-stop strategy is executed, and the energy utilization rate can be improved.
Description
Technical Field
The present invention relates to the field of hybrid vehicle control technologies, and in particular, to an engine control method, a medium, an electronic device, and a hybrid vehicle.
Background
In recent years, fuel vehicles or oil-electric hybrid vehicles with engines occupy an important market weight, but the hybrid vehicles still have a problem of oil emulsification, which is easy to occur in a low-temperature environment. The most main reason for the problem is that the engine is operated at low temperature for a long time or is started and stopped frequently at low temperature, so that the engine oil temperature cannot reach the normal working temperature of the engine. Meanwhile, water vapor brought by engine air intake and water vapor generated by combustion cannot be well separated from engine oil, so that the engine oil and the water are mixed for a long time, and the problem of engine oil emulsification is caused. After the oil is emulsified, various performances of the oil are reduced, and the oil is inside an engine, such as: qu Zhouwa, the components such as a cam shaft, a connecting rod bearing bush, a piston, a cylinder sleeve and the like cannot form an effective oil film, so that poor lubrication is caused, abrasion among the components is accelerated, and finally, serious losses such as engine damage and the like are caused.
Relatively speaking, hybrid vehicles, especially plug-in hybrid vehicles, have two different driving energy sources of oil and electricity, and the starting control of the engine depends on the power battery, so that the engine is started and stopped more frequently, the working time of the engine is shortened, the risk of engine oil emulsification is greatly increased, and if the problems cannot be well solved, serious after-sales problems are likely to be caused.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, an object of the present invention is to provide an engine control method that can effectively protect an engine, prolong the service life of the engine, and improve the utilization rate of energy.
A second object of the present invention is to propose a computer readable storage medium.
A third object of the present invention is to propose an electronic device.
A fourth object of the present invention is to provide a hybrid vehicle.
To achieve the above object, an embodiment of a first aspect of the present invention provides an engine control method, including: determining the oil emulsification level of an engine; and obtaining a corresponding start-stop strategy according to the engine oil emulsification grade, and performing start-stop control on the engine according to the start-stop strategy.
According to the engine control method, different engine oil emulsification levels correspond to different engine start-stop strategies, when the engine start-stop is controlled, the engine is controlled to start-stop according to the corresponding start-stop strategy by determining the engine oil emulsification level in the current engine, a user decision is not needed, and the intelligent degree of controlling the engine start-stop is improved; according to the engine oil emulsification grade of the engine, the engine is controlled to execute a corresponding start-stop strategy, so that parts inside the engine can be protected, the damage of the parts of the engine caused by the internal engine oil emulsification problem is prevented, and the service life of the engine is prolonged; according to the engine oil emulsification level of the engine, a corresponding start-stop strategy is executed, and the energy utilization rate can be improved.
In addition, the generator control method according to the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the invention, the determining the oil emulsification class of an engine comprises: acquiring the low Wen Qiting times, the low-temperature running time and the high-temperature running time of the engine; calculating the oil emulsification degree of the engine according to the low Wen Qiting times, the low-temperature operation time and the high-temperature operation time; and obtaining the oil emulsification grade according to the oil emulsification degree.
According to one embodiment of the invention, the low-temperature start-stop times are the start times of the engine at a cooling water temperature less than or equal to a first preset water temperature and an engine oil temperature less than or equal to a first preset engine oil temperature; the low-temperature running time is the accumulated running time of the engine at a cooling water temperature which is less than or equal to a second preset water temperature or an engine oil temperature which is less than or equal to a second preset engine oil temperature; the high-temperature running time is the accumulated running time of the engine at the cooling water temperature which is greater than or equal to a third preset water temperature and the engine oil temperature which is greater than or equal to a third preset engine oil temperature; the first preset water temperature is less than the second preset water temperature is less than the third preset water temperature, and the first preset machine oil temperature is less than the second preset machine oil temperature is less than the third preset machine oil temperature.
According to one embodiment of the invention, the degree of oil emulsification is calculated by the formula:
η＝λ 1 ×CNT lowTemp +λ 2 ×T lowTemp -λ 3 ×T highTemp
wherein eta represents the degree of emulsification of the engine oil, and CNT lowTemp Representing the low Wen Qiting times, T lowTemp Representing the low temperature operation time, T highTemp Representing the high temperature operation time lambda 1 Represents the emulsification risk weight of low-temperature start-stop times, lambda 2 Represents the low-temperature run-time emulsification risk weight, lambda 3 Indicating the high temperature run time emulsification risk weight.
According to one embodiment of the present invention, the obtaining the oil emulsification grade according to the oil emulsification degree includes: when the oil emulsification degree is smaller than a first preset value, obtaining the oil emulsification grade as a first grade; when the oil emulsification degree is smaller than a second preset value and is larger than or equal to the first preset value, obtaining the oil emulsification grade as a second grade; when the oil emulsification degree is smaller than a third preset value and is larger than or equal to the second preset value, obtaining the oil emulsification grade as a third grade; and when the oil emulsification degree is greater than or equal to the third preset value, obtaining the oil emulsification grade as a fourth grade.
According to one embodiment of the invention, the determining the oil emulsification class of an engine comprises: acquiring the ambient temperature of the engine; and when the ambient temperature is greater than or equal to a preset ambient temperature threshold, obtaining the oil emulsification grade as the first grade.
According to one embodiment of the invention, a corresponding start-stop strategy is obtained according to the oil emulsification grade, comprising: when the engine oil emulsification grade is the first grade, the obtained starting and stopping strategy is that an emulsification prevention delay stop mark is invalid and an emulsification prevention starting and stopping power adjustment mark is invalid; when the engine oil emulsification grade is the second grade, the obtained starting and stopping strategy is that an emulsification preventing delay stopping mark is effective and an emulsification preventing starting and stopping power adjusting mark is ineffective; when the engine oil emulsification grade is the third grade, the obtained starting and stopping strategy is that an emulsification preventing delay stopping mark is effective and an emulsification preventing starting and stopping power adjusting mark is effective; and when the oil emulsification grade is the fourth grade, the obtained start-stop strategy is that the emulsification prevention normal start mark is effective.
According to one embodiment of the invention, when the emulsification-preventing delayed stop flag is valid, if the engine meets a stop condition, the engine is controlled to be stopped in a delayed manner; wherein the shutdown condition includes the required power of the engine being less than the shutdown required power; when the emulsification-preventing start-stop power adjustment mark is effective, the starting demand power and the stopping demand power of the engine are adjusted according to the emulsification degree of the engine oil; the higher the oil emulsification degree is, the smaller the corresponding starting demand power and stopping demand power are respectively; when the emulsification prevention normal start flag is effective, the engine is controlled to keep Chang Qi state, and prompt information is sent out to prompt the normal start state.
According to one embodiment of the invention, when the emulsification-preventing delayed stop flag is active, if the engine meets a stop condition, the engine is controlled to stop after a preset delay time, wherein the preset delay time is a fixed value or the preset delay time is positively correlated with the oil emulsification degree.
According to one embodiment of the invention, the method further comprises: when the emulsification-preventing delay stop sign is valid, if the vehicle is detected to have electricity-protecting requirements, after the engine meets the stop condition, the engine is controlled to run at preset power to generate electricity, otherwise, the engine is controlled to work in an idle state until the engine stops.
According to one embodiment of the present invention, the method is used for a vehicle on which the engine is mounted, and the acquiring the low Wen Qiting times, the low temperature operation time and the high temperature operation time of the engine includes: the low Wen Qiting times, the low temperature operation time, and the high temperature operation time of the engine within a preset driving range that the vehicle has recently completed are acquired.
To achieve the above object, an embodiment of a second aspect of the present invention proposes a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements an engine control method as described above.
To achieve the above object, an embodiment of a third aspect of the present invention provides an electronic device including a memory and a processor, wherein the memory stores a computer program, and the computer program when executed by the processor implements the engine control method as described above.
To achieve the above object, an embodiment of a third aspect of the present invention provides a hybrid vehicle including the above-described electronic device.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a flow chart of an engine control method of one embodiment of the present invention;
FIG. 2 is a flow chart of determining an engine oil emulsion level according to one embodiment of the present invention;
FIG. 3 is a flow chart of oil emulsification degree calculation and emulsification level judgment according to one embodiment of the present invention;
FIG. 4 is a flow chart of determining oil emulsion grade based on ring temperature according to one embodiment of the present invention;
FIG. 5 is a flow chart of an engine start-stop strategy according to one embodiment of the present invention;
FIG. 6 is a power schematic diagram of an engine start-stop line control according to one embodiment of the invention;
FIG. 7 is a schematic diagram of an electronic device according to one embodiment of the invention;
fig. 8 is a schematic view of a hybrid vehicle according to an embodiment of the invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
The engine control method, medium, electronic device and hybrid vehicle according to the embodiments of the present invention will be described in detail with reference to fig. 1 to 8 of the accompanying drawings and specific embodiments.
FIG. 1 is a flow chart of a method of engine control according to one embodiment of the present invention. As shown in fig. 1, the engine control method may include:
s1, determining the oil emulsification level of an engine.
Specifically, the degree of emulsification of engine oil may be divided into a plurality of levels according to the degree of emulsification of engine oil. The smaller the degree of engine oil emulsification, the lower the risk of oil emulsification, which corresponds to a lower level of engine oil emulsification. When the engine is controlled to start and stop, different start and stop strategies can be executed according to the engine oil emulsification level of the engine so as to protect parts inside the engine and prevent the engine from being damaged.
Engine low temperature start-stop and engine low temperature operation increase the risk of oil emulsification, and engine high temperature operation is beneficial to water-oil separation of the engine. Therefore, the degree of oil emulsification of the engine can be determined based on the low Wen Qiting times, the low-temperature operation time, and the high-temperature operation time of the engine.
In one embodiment of the present invention, as shown in FIG. 2, determining the oil emulsion level of an engine may include:
s11, acquiring the low Wen Qiting times, the low-temperature operation time and the high-temperature operation time of the engine.
And S12, calculating the oil emulsification degree of the engine according to the low Wen Qiting times, the low-temperature operation time and the high-temperature operation time.
And S13, obtaining the oil emulsification grade according to the oil emulsification degree.
Specifically, after the engine is started, the low Wen Qiting times, the low temperature operation time and the high temperature operation time of the engine are acquired to calculate the oil emulsification degree of the engine according to the low Wen Qiting times, the low temperature operation time and the high temperature operation time of the engine to further determine the oil emulsification grade of the engine.
In one embodiment of the present invention, as shown in fig. 3, the low temperature start-stop number is the number of starts of the engine at a cooling water temperature less than or equal to the first preset water temperature, and an oil temperature less than or equal to the first preset oil temperature; the low-temperature running time is the accumulated running time of the engine at a cooling water temperature which is less than or equal to a second preset water temperature or an engine oil temperature which is less than or equal to a second preset engine oil temperature; the high-temperature running time is the accumulated running time of the engine at a cooling water temperature which is greater than or equal to a third preset water temperature and an engine oil temperature which is greater than or equal to a third preset engine oil temperature; the first preset water temperature is less than the second preset water temperature is less than the third preset water temperature, and the first preset machine oil temperature is less than the second preset machine oil temperature is less than the third preset machine oil temperature.
Specifically, at the time of engine start, the cooling water temperature and the engine oil temperature of the engine are obtained.
If the cooling water temperature of the engine is less than or equal to the first preset water temperature T water1 And the engine oil temperature of the engine is less than or equal to the first preset oil temperature T oil1 The engine is started at low temperature, and the engine is started and stopped at low temperature for times CNT lowTemp The count is incremented by 1, and thus, the calculation is looped.
When the engine is in an operating state, the cooling water temperature and the engine oil temperature of the engine are acquired again.
If the cooling water temperature of the engine is less than or equal to the second preset water temperature T water1 Or the engine oil temperature is less than or equal to the second preset engine oil temperature T oil2 At this time startThe engine runs at low temperature, and the duration of the engine running at low temperature is recorded, namely the low-temperature running time T lowTemp 。
If the cooling water temperature of the engine is greater than or equal to the third preset water temperature T water3 And the engine oil temperature is greater than or equal to a third preset engine oil temperature T oil3 At this time, the engine is operated at high temperature, and the high-temperature operation time of the engine, namely the high-temperature operation time T, is recorded highTemp 。
Further specifically, the degree of oil emulsification of the engine was calculated using the obtained low Wen Qiting times, low temperature operation time and high temperature operation time of the engine.
As a possible embodiment, the degree of emulsification of the oil can be calculated by the following formula:
η＝λ 1 ×CNT lowTemp +λ 2 ×T lowTemp -λ 3 ×T highTemp
wherein eta represents the degree of emulsification of engine oil and CNT lowTemp Representing a low Wen Qiting times, T lowTemp Indicating the low temperature operation time, T highTemp Represents the high-temperature operation time lambda 1 Represents the emulsification risk weight of low-temperature start-stop times, lambda 2 Represents the low-temperature run-time emulsification risk weight, lambda 3 Indicating the high temperature run time emulsification risk weight.
In the embodiment of the present invention, the oil emulsion and the like may be classified into four grades according to the degree η of engine oil emulsion. The oil emulsification grade is a first grade, a second grade, a third grade and a fourth grade, respectively. The smaller the oil emulsification degree η, the lower the corresponding oil emulsification risk, and the lower the oil emulsification grade.
In one embodiment of the present invention, obtaining the oil emulsification grade according to the oil emulsification degree may include: when the oil emulsification degree is smaller than a first preset value, obtaining an oil emulsification grade as a first grade; when the oil emulsification degree is smaller than the second preset value and is larger than or equal to the first preset value, obtaining the oil emulsification grade as a second grade; when the oil emulsification degree is smaller than the third preset value and is larger than or equal to the second preset value, obtaining the oil emulsification grade as a third grade; and when the oil emulsification degree is greater than or equal to a third preset value, obtaining the oil emulsification grade as a fourth grade.
Specifically, the calculated oil emulsification degree η is compared with a preset value to determine the current oil emulsification level of the engine. The first preset value is less than the second preset value, less than the third preset value, and less than the fourth preset value.
In the embodiment of the invention, before judging the oil emulsification level according to the oil emulsification degree eta, the environment temperature of the engine can be obtained first, the inorganic oil emulsification risk of the engine is judged according to the environment temperature of the engine, and the oil emulsification level is determined.
In one embodiment of the present invention, as shown in FIG. 4, determining the oil emulsion level of an engine may include:
s131, acquiring the ambient temperature of the engine.
And S132, when the ambient temperature is greater than or equal to a preset ambient temperature threshold value, obtaining the oil emulsification grade as a first grade.
In particular, the risk of engine oil emulsification typically occurs in low temperature environments where the engine is not at risk of oil emulsification when the ambient temperature around the engine is high. Therefore, before the engine oil emulsifying degree of the engine is calculated, the environment temperature of the engine can be obtained, when the environment temperature of the engine is greater than or equal to a preset environment temperature threshold value, the engine is free of the engine oil emulsifying risk, the engine oil emulsifying degree of the engine is judged to be the first grade, and the engine oil emulsifying degree eta is not required to be calculated. And when the engine ambient temperature is smaller than a preset ambient temperature threshold value, calculating the engine oil emulsification degree eta.
S2, obtaining a corresponding start-stop strategy according to the engine oil emulsification grade, and performing start-stop control on the engine according to the start-stop strategy.
Specifically, the degree of oil emulsification is different due to the different oil emulsification levels. Therefore, the engine can be controlled to execute different engine start-stop strategies according to the engine oil emulsification level.
In one embodiment of the present invention, as shown in fig. 5, obtaining a corresponding start-stop strategy according to the oil emulsification level may include: when the oil emulsification grade is the first grade, the obtained start-stop strategy is that the emulsification-prevention delay stop mark is invalid and the emulsification-prevention start-stop power adjustment mark is invalid; when the engine oil emulsifying grade is the second grade, the obtained start-stop strategy is that the emulsification-preventing delay stop mark is effective and the emulsification-preventing start-stop power adjustment mark is ineffective; when the engine oil emulsification grade is the third grade, the obtained start-stop strategy is that the emulsification-preventing delay stop mark is effective and the emulsification-preventing start-stop power adjustment mark is effective; when the oil emulsification grade is the fourth grade, the obtained start-stop strategy is that the emulsification prevention normal start mark is effective.
In one embodiment of the invention, when the emulsification-preventing delayed shutdown flag is valid, if the engine meets the shutdown condition, the delayed shutdown of the engine is controlled; wherein the shutdown condition includes the demand power of the engine being less than the shutdown demand power; when the emulsification-preventing start-stop power regulation mark is effective, the starting demand power and the stopping demand power of the engine are regulated according to the emulsification degree of engine oil; the higher the oil emulsification degree is, the smaller the corresponding starting demand power and stopping demand power are respectively; when the emulsification prevention normal start flag is valid, the engine is controlled to keep Chang Qi state, and prompt information is sent out to prompt the normal start state.
Specifically, an anti-emulsifying normal start sign, an anti-emulsifying delay stop sign and an indication lamp corresponding to the anti-emulsifying start-stop power adjustment sign can be arranged on the instrument panel. When the anti-emulsifying normal start mark is effective, the corresponding anti-emulsifying normal start mark indicator lights flash; when the emulsification-preventing delay shutdown mark is effective, the corresponding emulsification-preventing delay shutdown mark indicator lights flash; when the emulsification prevention start-stop power adjustment mark is effective, the corresponding emulsification prevention start-stop power adjustment mark indicator lights flash. According to whether the corresponding indicator lights on the instrument panel flash, whether the engine has an anti-emulsifying normal start-up sign, an anti-emulsifying delay stop requirement and an anti-emulsifying start-stop power adjustment requirement can be known.
When the oil emulsifying grade is the first grade, the engine oil is free of emulsifying risk, the starting and stopping of the engine and the running time of the engine are not needed to be interfered, and the emulsifying delay stopping mark and the emulsifying starting and stopping power adjusting mark are invalid.
When the oil emulsifying grade is the second grade, the engine has the oil emulsifying risk, but the oil emulsifying risk is not large, the engine delay stop can be controlled only, and the emulsification preventing delay stop mark is effective. Specifically, after the engine is started, the emulsification-preventing delayed stop sign is effective, and if the engine meets the stop condition (the required power of the engine is smaller than the stop required power), the controller can be used for delaying to send a stop command to the engine when no engine is required to be restarted. When the engine is controlled to stop in a delayed manner, if the engine has a starting requirement, the engine does not need to be restarted, so that partial rapid and frequent starting and stopping working conditions can be filtered, and the starting and stopping times are reduced. In addition, the engine is delayed to stop, the running time of the engine is increased to a certain extent, and the probability of keeping the water temperature of the engine and the oil temperature high is increased, so that the upgrading of the oil emulsification grade can be delayed.
When the engine oil emulsification level is the third level, the engine oil emulsification risk is higher, only controls the engine to stop in a delayed way and can not effectively solve the current engine oil emulsification risk, besides the delayed engine stop, the starting demand power and the stopping demand power of the engine are also required to be adjusted so as to increase the starting probability of the engine, reduce the stopping probability of the engine, and the emulsification-prevention starting and stopping power adjusting mark and the emulsification-prevention delay stopping mark are effective. The higher the oil emulsification degree is, the smaller the corresponding start-up demand power and stop demand power are, respectively.
When the oil emulsion grade is the fourth grade, the risk of engine oil emulsion is the greatest. This situation typically results in an increased risk of oil emulsification due to human error. Therefore, when the oil emulsification level is the fourth level, the engine needs to be kept in a normally-started state, and the emulsification prevention normally-started flag is valid.
In order to achieve a better effect, when the engine is controlled to be in a normal starting state, a prompt message can be sent to remind a user, and the engine needs to be kept in the normal starting state when the engine is in a maintenance requirement, so that the doubt of the user about the normal starting of the engine is reduced, and the aim of forced maintenance of the engine is fulfilled. The mode of sending the prompt message can be to control the flashing of the anti-emulsion normal start sign indicator lamp on the instrument panel, and can also send a voice prompt ' in maintenance requirement ', and the engine is kept in a start state at present '.
In the embodiment of the invention, when the emulsification-preventing delay shutdown flag is valid, if the engine meets a shutdown condition, the engine is controlled to shutdown after a preset delay time, wherein the preset delay time is a fixed value, or the preset delay time is positively correlated with the emulsification degree of engine oil.
Specifically, when the emulsification-preventing delayed shutdown flag is valid, that is, when the oil emulsification level is the third level or the second level, and the engine is judged to meet the shutdown condition, the engine is controlled to shutdown after a delay time is fixedly set, or the delay time of the engine is determined according to the oil emulsification degree, and shutdown is performed after the determined delay time.
In one embodiment of the present invention, the engine control method may further include: when the emulsification preventing delay stop sign is effective, if the vehicle is detected to have electricity protection requirement, controlling the engine to work at preset power to generate electricity after the engine meets the stop condition, otherwise controlling the engine to work in an idle state until the engine stops.
Specifically, when the emulsification-preventing delay shutdown flag is effective, that is, the oil emulsification level is the third level or the second level, whether the engine works in a power generation state lower than preset power or in an idle state can be judged according to the requirement of the user for actively managing energy and the power-saving requirement state under the corresponding working condition. Further specifically, after the engine meets the shutdown condition and has electricity-saving requirements, the working state of the engine is controlled to operate at a preset power to generate electricity, wherein the preset power can be a fixed value or a section. And after the engine meets the stop condition and no electricity-retaining requirement exists, controlling the engine to work in an idle state until the engine stops. The power generation is performed according to the electricity-keeping requirements of users and vehicles, and the energy utilization rate can be greatly improved while the water-oil separation requirement is met.
In one embodiment of the invention, the engine control method may be used for a vehicle on which an engine is mounted.
Specifically, the vehicle on which the engine is mounted in the embodiment of the present invention may be a fuel-powered vehicle or a hybrid vehicle.
When the engine oil emulsification level is a third level, and when the engine is subjected to emulsification prevention start-stop power adjustment control, such as when the oil-Electric hybrid Vehicle is subjected to emulsification prevention start-stop power adjustment control, when the oil-Electric hybrid Vehicle is in a certain charge state, as shown in fig. 6, when the engine of the oil-Electric hybrid Vehicle is subjected to emulsification prevention start-stop power adjustment control, the engine start-stop line is transferred from T1 to T2, the working area of an EV (Electric Vehicle) mode is reduced, and the serial working area is increased, so that the power required by engine start and stop is reduced, the engine is easier to start and is harder to stop, the energy driven by the oil-Electric hybrid Vehicle is preferably derived from fuel, the power retention capacity of the oil-Electric hybrid Vehicle is improved, the engine is further delayed to stop, the time for starting the engine is greatly increased, the probability for starting and stopping the engine are reduced, and the engine oil emulsification level is delayed.
When the oil emulsification grade is the fourth grade, the oil emulsification risk is the largest. This situation typically results in a sudden increase in the risk of oil emulsification caused by human error. For example, users have frequent charging habits, but still use HEV (Hybrid Electric Vehicle ) mode for short mileage traveling in a low temperature environment; under the low-temperature environment, the engine is frequently started and stopped by controlling the activation and the prohibition of other functions with the requirement of starting the engine. Therefore, when the oil emulsification level is the fourth level, the treatment method of the oil emulsification level of the second level and the third level is adopted, and the engine is ensured to be kept in a normal start state under the condition that the vehicle has driving requirements, so that the engine is kept at a higher temperature for a long time, and the moisture in the oil is thoroughly stripped.
In one embodiment of the invention, obtaining the low Wen Qiting times, low temperature run time and high temperature run time of the engine may include: the low Wen Qiting times, the low-temperature operation time, and the high-temperature operation time of the engine within the preset mileage that the vehicle has recently completed are acquired.
Specifically, the vehicle with the engine can acquire the latest completed driving range of L 1 Low temperature start-stop times CNT in a range lowTemp Low temperature run time T lowTemp And a high temperature operation time T highTemp Exceeding the driving distance L 1 CNTs outside the range lowTemp 、T lowTemp 、T highTemp The emulsification degree judgment is not included.
When the engine control method is used for a vehicle carrying an engine, the requirement for preventing engine oil from emulsifying is integrated into a conventional engine start-stop control strategy, so that the engine oil emulsifying problem of the engine is effectively prevented, the engine start of the vehicle in a parking state under unknown environments such as a user is reduced, and the safety performance of the vehicle is improved. If the abnormal control of the engine start and stop of the user is detected, and the engine oil emulsification risk is increased, the engine is kept to be always started in the environment where the user has driving demands, and meanwhile, related prompts are provided, so that the user does not need to make decisions, and the risk of engine damage caused by the engine oil emulsification problem is reduced for some unknowing users. Under the condition that the engine is started due to emulsification prevention, power generation is performed according to electricity-keeping requirements of users and vehicles, and the energy utilization rate is greatly improved while the water-oil separation requirement is met.
According to the engine control method, when the start and stop of the engine are controlled, the engine is controlled to start and stop according to the corresponding start and stop strategy by determining the oil emulsification level in the current engine, a user decision is not needed, and the intelligent degree of controlling the start and stop of the engine is improved; according to the engine oil emulsification grade of the engine, the engine is controlled to execute a corresponding start-stop strategy, so that parts inside the engine can be protected, the damage of the parts of the engine caused by the internal engine oil emulsification problem is prevented, and the service life of the engine is prolonged; according to the engine oil emulsification level of the engine, a corresponding start-stop strategy is executed, and the utilization rate of energy sources can be improved.
The invention also proposes a computer readable storage medium.
In one embodiment of the present invention, a computer program is stored on a computer readable storage medium, which when executed by a processor, implements an engine control method as described above.
The invention further provides electronic equipment.
In one embodiment of the present invention, as shown in fig. 7, the electronic device 100 includes a memory 10 and a processor 20, and the memory 10 stores a computer program thereon, which when executed by the processor 10, implements the engine control method as described above.
The invention also provides a hybrid electric vehicle.
In one embodiment of the present invention, as shown in fig. 8, a hybrid vehicle 1000 includes an electronic device 100 as described above.
The storage medium, the electronic equipment and the hybrid electric vehicle can effectively protect the engine, prolong the service life of the engine and improve the utilization rate of energy.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, for example, may be considered as a ordered listing of executable instructions for implementing logical functions, and may be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (14)
1. An engine control method, characterized in that the method comprises:
determining the oil emulsification level of an engine;
and obtaining a corresponding start-stop strategy according to the engine oil emulsification grade, and performing start-stop control on the engine according to the start-stop strategy.
2. The engine control method according to claim 1, characterized in that the determining of the oil emulsification level of the engine includes:
acquiring the low Wen Qiting times, the low-temperature running time and the high-temperature running time of the engine;
calculating the oil emulsification degree of the engine according to the low Wen Qiting times, the low-temperature operation time and the high-temperature operation time;
and obtaining the oil emulsification grade according to the oil emulsification degree.
3. The engine control method according to claim 2, characterized in that,
the low-temperature start-stop times are the start times of the engine at a cooling water temperature which is less than or equal to a first preset water temperature and an engine oil temperature which is less than or equal to a first preset engine oil temperature;
the low-temperature running time is the accumulated running time of the engine at a cooling water temperature which is less than or equal to a second preset water temperature or an engine oil temperature which is less than or equal to a second preset engine oil temperature;
the high-temperature running time is the accumulated running time of the engine at the cooling water temperature which is greater than or equal to a third preset water temperature and the engine oil temperature which is greater than or equal to a third preset engine oil temperature;
the first preset water temperature is less than the second preset water temperature is less than the third preset water temperature, and the first preset machine oil temperature is less than the second preset machine oil temperature is less than the third preset machine oil temperature.
4. The engine control method according to claim 3, characterized in that the degree of emulsification of the engine oil is calculated by the following formula:
η＝λ 1 ×CNT lowTemp +λ 2 ×T lowTemp -λ 3 ×T highTemp
wherein eta represents the degree of emulsification of the engine oil, and CNT lowTemp Representing the low Wen Qiting times, T lowTemp Representing the low temperature operation time, T highTemp Representing the high temperature operation time lambda 1 Represents the emulsification risk weight of low-temperature start-stop times, lambda 2 Represents the low-temperature run-time emulsification risk weight, lambda 3 Indicating the high temperature run time emulsification risk weight.
5. The engine control method according to any one of claims 2 to 4, characterized in that the obtaining the oil emulsification grade according to the oil emulsification degree includes:
when the oil emulsification degree is smaller than a first preset value, obtaining the oil emulsification grade as a first grade;
when the oil emulsification degree is smaller than a second preset value and is larger than or equal to the first preset value, obtaining the oil emulsification grade as a second grade;
when the oil emulsification degree is smaller than a third preset value and is larger than or equal to the second preset value, obtaining the oil emulsification grade as a third grade;
and when the oil emulsification degree is greater than or equal to the third preset value, obtaining the oil emulsification grade as a fourth grade.
6. The engine control method according to claim 5, characterized in that the determining of the oil emulsification level of the engine includes:
acquiring the ambient temperature of the engine;
and when the ambient temperature is greater than or equal to a preset ambient temperature threshold, obtaining the oil emulsification grade as the first grade.
7. The engine control method of claim 5, wherein deriving a corresponding start-stop strategy based on the oil emulsion level comprises:
when the engine oil emulsification grade is the first grade, the obtained starting and stopping strategy is that an emulsification prevention delay stop mark is invalid and an emulsification prevention starting and stopping power adjustment mark is invalid;
when the engine oil emulsification grade is the second grade, the obtained starting and stopping strategy is that an emulsification preventing delay stopping mark is effective and an emulsification preventing starting and stopping power adjusting mark is ineffective;
when the engine oil emulsification grade is the third grade, the obtained starting and stopping strategy is that an emulsification preventing delay stopping mark is effective and an emulsification preventing starting and stopping power adjusting mark is effective;
and when the oil emulsification grade is the fourth grade, the obtained start-stop strategy is that the emulsification prevention normal start mark is effective.
8. The engine control method according to claim 7, characterized in that,
when the emulsification-preventing delay stop sign is effective, if the engine meets a stop condition, controlling the engine to delay stopping; wherein the shutdown condition includes the required power of the engine being less than the shutdown required power;
when the emulsification-preventing start-stop power adjustment mark is effective, the starting demand power and the stopping demand power of the engine are adjusted according to the emulsification degree of the engine oil; the higher the oil emulsification degree is, the smaller the corresponding starting demand power and stopping demand power are respectively;
when the emulsification prevention normal start flag is effective, the engine is controlled to keep Chang Qi state, and prompt information is sent out to prompt the normal start state.
9. The engine control method according to claim 7, characterized in that when the emulsification-preventing delay stop flag is on, if the engine satisfies a stop condition, the engine is controlled to stop after a preset delay time, wherein the preset delay time is a fixed value or the preset delay time is positively correlated with the degree of emulsification of the engine oil.
10. The engine control method according to claim 7, characterized in that the method further comprises:
when the emulsification-preventing delay stop sign is valid, if the vehicle is detected to have electricity-protecting requirements, after the engine meets the stop condition, the engine is controlled to run at preset power to generate electricity, otherwise, the engine is controlled to work in an idle state until the engine stops.
11. The engine control method according to claim 1, characterized in that the method is for a vehicle on which the engine is mounted, the obtaining the low Wen Qiting times, the low-temperature operation time, and the high-temperature operation time of the engine includes:
the low Wen Qiting times, the low temperature operation time, and the high temperature operation time of the engine within a preset driving range that the vehicle has recently completed are acquired.
12. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed by a processor, implements the engine control method according to any one of claims 1 to 11.
13. An electronic device comprising a memory and a processor, the memory having stored thereon a computer program, characterized in that the computer program, when executed by the processor, implements the engine control method according to any one of claims 1-11.
14. A hybrid vehicle comprising the electronic device according to claim 13.
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| CN202210602398.0A CN117189386A (en) | 2022-05-30 | 2022-05-30 | Engine control method, medium, electronic device and hybrid vehicle |
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| CN202210602398.0A CN117189386A (en) | 2022-05-30 | 2022-05-30 | Engine control method, medium, electronic device and hybrid vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117627798A (en) * | 2024-01-26 | 2024-03-01 | 潍柴动力股份有限公司 | Control method and control system of extended-range engine, extended-range engine and vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117627798A (en) * | 2024-01-26 | 2024-03-01 | 潍柴动力股份有限公司 | Control method and control system of extended-range engine, extended-range engine and vehicle |
| CN117627798B (en) * | 2024-01-26 | 2024-05-17 | 潍柴动力股份有限公司 | Control method and control system of extended-range engine, extended-range engine and vehicle |
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