CN-117189386-B - Engine control method, medium, electronic device and hybrid vehicle

CN117189386BCN 117189386 BCN117189386 BCN 117189386BCN-117189386-B

Abstract

The invention discloses an engine control method, a medium, electronic equipment and a hybrid electric vehicle, wherein the engine control method comprises the steps of determining the engine 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 the corresponding start and stop strategy by determining the current engine oil emulsification level, a user does not need to make a decision, the intelligent degree of controlling the start and stop of the engine is improved, the engine is controlled to execute the corresponding start and stop strategy according to the engine oil emulsification level of the engine, parts in the engine can be protected, the damage of the parts of the engine caused by the internal engine oil emulsification problem is prevented, the service life of the engine is prolonged, and the energy utilization rate can be improved by executing the corresponding start and stop strategy according to the engine oil emulsification level of the engine.

Inventors

CHEN ZHILE
WANG JIQUAN
WANG CHUNSHENG
XU BOLIANG

Assignees

比亚迪股份有限公司
比亚迪汽车工业有限公司

Dates

Publication Date: 20260505
Application Date: 20220530

Claims (13)

1. An engine control method, characterized in that the method comprises: Determining the oil emulsification level of an engine; 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, wherein obtaining the corresponding start-stop strategy according to the engine oil emulsification grade comprises the following steps: When the engine oil emulsifying grade is the first grade, the obtained starting and stopping strategy is that an emulsification preventing delay stopping mark is invalid and an emulsification preventing starting and stopping power adjusting mark is invalid; when the engine oil emulsifying 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 oil emulsification level is the third level, 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 emulsification-preventing starting and stopping power adjusting mark is effective, the starting required power and the stopping required power of the engine are adjusted according to the oil emulsification degree so as to increase the starting probability of the engine and reduce the stopping probability of the engine; and when the oil emulsification grade is the fourth grade, the obtained start-stop strategy is that the emulsification prevention normal start-up mark is effective.
2. The engine control method according to claim 1, characterized in that the determining of the oil emulsification level of the engine includes: acquiring low Wen Qiting times, low-temperature running time and 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 running time and the high-temperature running 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; Wherein the first preset water temperature < the second preset water temperature < the third preset water temperature, the first preset machine oil temperature < the second preset machine oil temperature < 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: Wherein, the Indicating the degree of emulsification of the engine oil, Indicating the said low number Wen Qiting of times, Indicating the low-temperature operation time of the device, Indicating the high-temperature operation time of the device, The emulsification risk weight of the times of low-temperature start-stop is represented, Representing the risk weight of low temperature run-time emulsification, 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 according to claim 1, 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 stop condition comprises that the required power of the engine is smaller than the stop required power; When the anti-emulsifying normal start sign is effective, the engine is controlled to keep Chang Qi states, and prompt information is sent out to prompt the normal start state.
8. The engine control method according to claim 1, 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.
9. The engine control method according to claim 1, characterized in that the method further comprises: when the emulsification-preventing delay stop sign is effective, if the vehicle is detected to have electricity-protecting requirements, controlling the engine to run at preset power to generate electricity after the engine meets stop conditions, otherwise controlling the engine to work in an idle state until the engine stops.
10. The engine control method according to claim 2, 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: And acquiring the low Wen Qiting times, the low-temperature running time and the high-temperature running time of the engine within the preset running mileage which is completed recently by the vehicle.
11. 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 10.
12. 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 1-10.
13. A hybrid vehicle comprising the electronic device according to claim 12.

Description

Engine control method, medium, electronic device and hybrid vehicle 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 engine oil is emulsified, various performances of the engine oil are reduced, and an effective oil film cannot be formed inside the engine, such as Qu Zhouwa parts, such as a camshaft, a connecting rod bearing bush, a piston, a cylinder sleeve and the like, so that poor lubrication is caused, abrasion among the parts 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. In order to achieve the above purpose, an embodiment of a first aspect of the present invention provides an engine control method, which includes determining an oil emulsification level of an engine, obtaining a corresponding start-stop strategy according to the oil emulsification level, and performing start-stop control on the engine according to the start-stop strategy. The engine control method of the embodiment of the invention has the advantages that different engine oil emulsification levels correspond to different engine start-stop strategies, when the engine is controlled to start and stop, the engine is controlled to start and stop according to the corresponding start-stop strategy by determining the engine oil emulsification level in the current engine, the intelligent degree of controlling the engine to start and stop is improved without a user decision, the engine is controlled to execute the corresponding start-stop strategy according to the engine oil emulsification level of the engine, the parts in the engine can be protected, the damage of the parts of the engine caused by the internal engine oil emulsification problem is prevented, the service life of the engine is prolonged, and the energy utilization rate can be improved by executing the corresponding start-stop strategy according to the engine oil emulsification level of the engine. 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 method for determining the engine oil emulsifying level of the engine comprises the steps of obtaining low Wen Qiting times, low-temperature operation time and high-temperature operation time of the engine, calculating the engine oil emulsifying level of the engine according to the low Wen Qiting times, the low-temperature operation time and the high-temperature operation time, and obtaining the engine oil emulsifying level according to the engine oil emulsifying level. 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 which is smaller than or equal to a first preset water temperature and at an engine oil temperature which is smaller than or equal to a first preset oil temperature, the low-temperature operation time is the accumulated operation time of the engine at the cooling water temperature which is s