CN109630231B - Solution method and device for engine oil dilution - Google Patents
Solution method and device for engine oil dilution Download PDFInfo
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- CN109630231B CN109630231B CN201811474165.7A CN201811474165A CN109630231B CN 109630231 B CN109630231 B CN 109630231B CN 201811474165 A CN201811474165 A CN 201811474165A CN 109630231 B CN109630231 B CN 109630231B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
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Abstract
The application provides a solution for engine oil dilution, which comprises the following steps: acquiring the current engine speed, the current engine oil temperature and the current outlet liquid temperature of cooling liquid of an engine radiator; if the preset engine oil temperature is higher than the current engine oil temperature, acquiring a temperature difference value between the preset engine oil temperature and the current engine oil temperature; the preset engine oil temperature is greater than a first threshold and less than a second threshold; acquiring the opening degree of the thermostat according to the current engine speed, the temperature difference and the current outlet temperature of the cooling liquid of the engine radiator; and controlling the thermostat according to the opening of the thermostat. Utilize the solution device that the machine oil that this application provided dilutes, can reduce the risk that machine oil dilutes, extension machine oil life cycle and protection engine. The application also provides a solution device for engine oil dilution.
Description
Technical Field
The application relates to the technical field of vehicle control, in particular to a solution method and device for engine oil dilution.
Background
The DPF (Diesel Particulate Filter ) active regeneration process adopts an in-cylinder post-injection technology, on the basis of an original fuel injection system of an engine, fuel is injected at a certain moment (generally when the rotation angle of a crankshaft is 140-160 ℃) after the top dead center of a piston in a cylinder is far away, then exhaust gas containing incompletely combusted HC (Hydrocarbon) enters an exhaust pipe, the exhaust gas is oxidized and released heat through a DOC (Diesel oxidation catalyst) at the upstream of the DPF, and the temperature is increased so as to realize the DPF active regeneration.
However, when the fuel is injected backwards in the cylinder, part of unvaporized fuel is remained on the cylinder wall, and the fuel enters the oil pan along the cylinder wall to be mixed with the engine oil, that is, the engine oil is diluted, so that the viscosity of the engine oil is reduced, the lubricating performance of the engine oil is deteriorated, the service cycle of the engine oil is shortened, and meanwhile, the abrasion of the engine is possibly accelerated, so that how to solve the problem of engine oil dilution is an urgent need at present.
Disclosure of Invention
In order to solve the technical problems in the prior art, the application provides a method and a device for solving the dilution of engine oil, which can reduce the dilution risk of the engine oil, prolong the service life of the engine oil and protect an engine.
The application provides a solution for engine oil dilution, which comprises the following steps:
acquiring the current engine speed, the current engine oil temperature and the current outlet liquid temperature of cooling liquid of an engine radiator;
if the preset engine oil temperature is higher than the current engine oil temperature, acquiring a temperature difference value between the preset engine oil temperature and the current engine oil temperature; the preset engine oil temperature is greater than a first threshold and less than a second threshold;
acquiring the opening degree of the thermostat according to the current engine speed, the temperature difference and the current outlet temperature of the cooling liquid of the engine radiator;
and controlling the thermostat according to the opening of the thermostat.
Optionally, the first threshold is a temperature at which fuel oil volatilizes, and the second threshold is a temperature at which engine oil volatilizes.
Optionally, the obtaining of the opening degree of the thermostat according to the current engine speed, the temperature difference value, and the current outlet temperature of the coolant of the engine radiator specifically includes:
obtaining the flow of cooling liquid and the flow of engine oil according to the current engine speed;
and acquiring the opening degree of the thermostat according to the temperature difference, the current liquid outlet temperature of the cooling liquid of the engine radiator, the flow rate of the cooling liquid and the flow rate of the engine oil.
Optionally, the obtaining of the opening degree of the thermostat according to the temperature difference, the current outlet temperature of the coolant of the engine radiator, the coolant flow, and the engine oil flow specifically includes:
acquiring the heat required by the current engine oil to reach the preset engine oil temperature according to the engine oil flow and the temperature difference;
obtaining a target liquid outlet temperature according to the required heat, the current liquid outlet temperature of the cooling liquid of the engine radiator and the flow of the cooling liquid;
and acquiring the opening degree of the thermostat according to the target liquid outlet temperature.
Optionally, the method further includes:
acquiring the current environment temperature;
correcting the target liquid outlet temperature of the cooling liquid of the engine radiator according to the current environment temperature to obtain the corrected target liquid outlet temperature;
and acquiring the corrected opening degree of the thermostat according to the corrected target outlet liquid temperature.
The embodiment of this application still provides a solution device that machine oil dilutes, the device includes: the device comprises a first acquisition unit, a second acquisition unit, a third acquisition unit and a control unit;
the first obtaining unit is used for obtaining the current engine speed, the current engine oil temperature and the current liquid outlet temperature of cooling liquid of an engine radiator;
the second obtaining unit is used for obtaining a temperature difference value between the preset engine oil temperature and the current engine oil temperature if the preset engine oil temperature is greater than the current engine oil temperature; the preset engine oil temperature is greater than a first threshold and less than a second threshold;
the third obtaining unit is used for obtaining the opening degree of the thermostat according to the current engine speed, the temperature difference value and the current outlet temperature of the cooling liquid of the engine radiator;
and the control unit is used for controlling the thermostat according to the opening degree of the thermostat.
Optionally, the first threshold is a temperature at which fuel oil volatilizes, and the second threshold is a temperature at which engine oil volatilizes.
Optionally, the third obtaining unit includes: a flow rate obtaining subunit and an opening obtaining subunit;
the flow acquiring subunit is used for acquiring the flow of the cooling liquid and the flow of the engine oil according to the current engine rotating speed;
and the opening obtaining subunit is used for obtaining the opening of the thermostat according to the temperature difference, the current liquid outlet temperature of the cooling liquid of the engine radiator, the flow of the cooling liquid and the flow of the engine oil.
Optionally, the opening obtaining subunit includes: a heat acquisition subunit and a temperature acquisition subunit;
the heat acquiring subunit is used for acquiring the heat required by the current engine oil to reach the preset engine oil temperature according to the engine oil flow and the temperature difference;
the temperature obtaining subunit is used for obtaining a target liquid outlet temperature according to the required heat, the current liquid outlet temperature of the cooling liquid of the engine radiator and the flow rate of the cooling liquid;
the opening obtaining subunit is further configured to obtain the opening of the thermostat according to the target effluent temperature.
Optionally, the method further includes: a fourth acquisition unit and a correction unit;
the fourth obtaining unit is used for obtaining the current environment temperature;
the correction unit is used for correcting the target liquid outlet temperature of the cooling liquid of the engine radiator according to the current environment temperature to obtain the corrected target liquid outlet temperature;
and the opening obtaining subunit is further configured to obtain the corrected opening of the thermostat according to the corrected target outlet temperature.
The method has the following advantages:
according to the solution for engine oil dilution, the current engine speed, the current engine oil temperature and the current liquid outlet temperature of cooling liquid of an engine radiator are obtained; if the preset engine oil temperature is higher than the current engine oil temperature, acquiring a temperature difference value between the preset engine oil temperature and the current engine oil temperature; the preset engine oil temperature is greater than a first threshold and less than a second threshold; acquiring the opening degree of the thermostat according to the current engine speed, the temperature difference and the current outlet temperature of the cooling liquid of the engine radiator; and controlling the thermostat according to the opening of the thermostat, and controlling the thermostat to regulate the flow of the cooling liquid entering the engine radiator so as to regulate the heat dissipation capacity of the engine radiator. By means of the method, when the current engine oil temperature is lower than the preset engine oil temperature, the flow of the cooling liquid entering the engine radiator can be reduced by controlling the thermostat, the engine oil temperature is increased, fuel oil mixed into the engine oil can be volatilized, the risk of engine oil dilution is reduced, the service cycle of the engine oil is prolonged, and the engine is protected.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of a solution for engine oil dilution according to an embodiment of the present disclosure;
FIG. 2 is a block diagram of a solution device for engine oil dilution according to a second embodiment of the present disclosure;
fig. 3 is a structural diagram of another solution device for engine oil dilution according to the second embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The first embodiment is as follows:
the embodiment of the application provides a solution for engine oil dilution, which is specifically described below with reference to the accompanying drawings.
Referring to fig. 1, a flowchart of a solution for oil dilution according to an embodiment of the present application is shown.
The method comprises the following steps:
s101: the method comprises the steps of obtaining the current engine speed, the current engine oil temperature and the current liquid outlet temperature of cooling liquid of an engine radiator.
The engine water pump is used for circulating cooling liquid from the engine to the radiating water tank and the oil pump; the engine oil pump is used for delivering engine oil to the motion surface of each part of the engine to provide lubrication, the engine water pump and the engine oil pump are respectively in belt transmission and gear transmission, and in the normal working process of the engine, linear relations are formed between the engine rotating speed and the flow of the engine water pump and between the engine rotating speed and the flow of the engine oil pump, so that the current corresponding cooling liquid flow and the current corresponding engine oil flow can be obtained according to the current engine rotating speed.
The current engine oil temperature is the actual engine oil temperature under the current working condition, and it is noted that the engine oil may be mixed with fuel oil at this time.
The current outlet temperature of the cooling liquid of the engine radiator refers to the temperature of the cooling liquid of the engine radiator flowing out from the engine end at the moment, the cooling liquid can absorb the heat of the engine end when flowing through the engine, the heat absorbed by the cooling liquid when flowing through the engine can be adjusted by adjusting the flow of the cooling liquid, and the temperature of engine oil of the engine can be adjusted.
S102: if the preset engine oil temperature is higher than the current engine oil temperature, acquiring a temperature difference value between the preset engine oil temperature and the current engine oil temperature; the preset engine oil temperature is greater than a first threshold value and less than a second threshold value.
The first threshold is the temperature at which fuel oil volatilizes, and the second threshold is the temperature at which engine oil volatilizes. Because the temperature that engine oil will send is far higher than the temperature that fuel will send, therefore the second threshold is greater than first threshold, therefore the method of this application utilizes the principle that engine oil and fuel volatilization temperature have huge difference, realizes the separation to engine oil and fuel, specifically:
when fuel oil is mixed in the engine oil, the preset engine oil temperature can be greater than a first threshold value and smaller than a second threshold value, namely, the preset engine oil temperature is greater than the temperature at which the fuel oil volatilizes and is smaller than the temperature at which the engine oil volatilizes, so that the fuel oil in the engine oil is volatilized. Examples are as follows:
when the fuel oil is diesel oil, the volatilization temperature of the fuel oil is generally about 80 ℃ (the volatilization temperatures of different types of diesel oil are different to a certain extent, but the difference is not large), namely the first threshold value is 80 ℃; for the engine oil, the volatilization temperature is generally about 200 ℃ (the volatilization temperatures of the engine oils of different models are different from each other, but the difference is not large), that is, the second threshold is 200 ℃, and if the diesel oil is mixed into the engine oil at this time, the preset engine oil temperature can be set to be a temperature value which is greater than 80 ℃ and less than 200 ℃, so that the diesel oil mixed into the engine oil is volatilized, and the separation of the engine oil and the diesel oil is further realized.
It should be noted that the preset oil temperature is not set too high, because the too high preset oil temperature indicates that the working temperature of the engine is too high at this time, which may increase the working load of the engine, for example, the preset oil temperature may be selected as 85 ℃ in this example, which may ensure that the diesel oil is volatilized and may not increase the working load of the engine too much, but if the preset oil temperature is set too high, for example, set as 100 ℃, although the diesel oil is volatilized, the load of the engine may be increased, and the too high temperature may accelerate the aging of the oil. The above example is only for convenience of description, and the preset oil temperature and the types of fuel oil and oil are not specifically limited in the present application.
And judging the preset engine oil temperature and the current engine oil temperature, if the preset engine oil temperature is lower than the current engine oil temperature, indicating that the fuel oil mixed in the current engine oil is in a volatile state, otherwise, indicating that the fuel oil mixed in the current engine oil is not in the volatile state, and needing to increase the engine oil temperature.
And acquiring a temperature difference value between the preset engine oil temperature and the current engine oil temperature, wherein the temperature difference value is a temperature value required to be increased by the engine oil temperature.
S103: and acquiring the opening degree of the thermostat according to the current engine speed, the temperature difference and the current outlet liquid temperature of the cooling liquid of the engine radiator.
The current engine speed can obtain the current corresponding engine oil flow q1(unit is m)3Per second in cubic meters), from the oil flow q1The unit time t can be determined0The volume of oil delivered by the oil pump in (s, sec) is denoted as V1(unit is m)3cubic meter), considering that the amount of fuel mixed into the engine oil is smaller than the amount of the engine oil, and the influence on the engine oil density and the specific heat capacity after a small amount of fuel is mixed can be ignored within an error allowable range, the temperature difference is recorded as △ T (unit is ℃, centigrade), the required heat when the current engine oil reaches the preset engine oil temperature can be obtained and recorded as Q (unit is J, joule), and the specific calculation process is as follows:
V1＝q1×t0(1)
Q＝C1×ρ1×V1×ΔT (2)
c in formula (2)1The specific heat capacity of the engine oil (unit is J/(kg ℃), Joule per kilogram centigrade); rho1Is the density of the motor oil (in kg/m3, kilograms per cubic meter).
Then obtaining the current corresponding cooling liquid flow q according to the current engine speed2(unit is m)3(ii)/S, cubic meters per second); from the coolant flow q2Determining a unit time t0Inner volume of cooling fluid flowing through the engine end, denoted V2(unit is m)3Cubic meter).
It should be noted that the principle of controlling the temperature rise of the engine oil in the method of the present application is to adjust and reduce the flow rate of the coolant entering the engine radiator, that is, to reduce the heat taken away by the coolant when the coolant flows through the engine end, so that the required heat Q when the current engine oil reaches the preset engine oil temperature is the heat taken away by the engine coolant, and the required heat Q and the current outlet temperature T of the coolant of the engine radiator are determined according to the required heat Q and the current outlet temperature T of the coolant of the engine radiator1The target liquid outlet temperature T can be obtained (the unit is DEG C)2(unit is ℃, centigrade degree), the specific calculation process is as follows:
V2＝q2×t0(3)
Q＝C2×ρ2×V2×(T2-T1) (4)
c in formula (4)2The specific heat capacity of the cooling liquid (unit is J/(kg ℃), Joule per kilogram centigrade); rho2Is the density of the cooling liquid (in kg/m3, kilograms per cubic meter).
The (4) and (1), (2) and (3) are deformed simultaneously to obtain
According to the calibrated model, according to the target liquid outlet temperature T2And acquiring the corresponding opening degree of the thermostat.
S104: and controlling the thermostat according to the opening of the thermostat.
And controlling the thermostat according to the opening of the thermostat, namely adjusting the flow of the cooling liquid entering the engine radiator so as to adjust the heat dissipation capacity of the engine radiator. When the current engine oil temperature is lower than the preset engine oil temperature, the flow of the cooling liquid entering the engine radiator can be reduced through the steps, so that the heat dissipation capacity of the engine radiator is reduced, and the engine oil temperature can be gradually increased to the preset engine oil temperature.
In addition, considering the influence of the external environment temperature on the temperature of the cooling liquid, for example, the cooling liquid is slowly radiated due to the high temperature in summer, the temperature of the cooling liquid flowing into the engine end is correspondingly high, and the heat taken away when the cooling liquid flows out of the engine end is relatively low, so that the accumulated temperature of the engine is favorably and rapidly increased; in winter, when the temperature is low, the cooling liquid can be quickly radiated, the temperature of the cooling liquid flowing into the engine end is relatively low, the heat taken away when the cooling liquid flows out of the engine end is relatively more, the accumulated temperature of the engine is slowed down, and the temperature T of the target outlet water of the current environment temperature can be obtained2Certain corrections are made.
According to the current environment temperature, the target outlet liquid temperature T of the cooling liquid of the engine radiator2Correcting to obtain the corrected target liquid outlet temperature T3。
According to the corrected target liquid outlet temperature T3And the opening degree of the corrected thermostat is obtained, so that the flow of the cooling liquid of the engine radiator can be more accurately adjusted, and the influence caused by extreme environment temperature is effectively prevented.
According to the solution for engine oil dilution, the current engine speed, the current engine oil temperature and the current liquid outlet temperature of cooling liquid of an engine radiator are obtained; if the preset engine oil temperature is higher than the current engine oil temperature, acquiring a temperature difference value between the preset engine oil temperature and the current engine oil temperature; the preset engine oil temperature is greater than a first threshold and less than a second threshold; acquiring the opening degree of the thermostat according to the current engine speed, the temperature difference and the current outlet temperature of the cooling liquid of the engine radiator; and controlling the thermostat according to the opening of the thermostat, and controlling the thermostat to regulate the flow of the cooling liquid entering the engine radiator so as to regulate the heat dissipation capacity of the engine radiator. By means of the method, when the current engine oil temperature is lower than the preset engine oil temperature, the flow of the cooling liquid entering the engine radiator can be reduced by controlling the thermostat, the engine oil temperature is increased, fuel oil mixed into the engine oil can be volatilized, the risk of engine oil dilution is reduced, the service cycle of the engine oil is prolonged, and the engine is protected.
Example two:
based on the solution for engine oil dilution provided by the above embodiment, the second embodiment of the present application further provides a solution for engine oil dilution, which is specifically described below with reference to the accompanying drawings.
Referring to fig. 2, the figure is a structural diagram of a solution device for engine oil dilution according to a second embodiment of the present application.
The device of the embodiment of the application comprises: a first acquisition unit 201, a second acquisition unit 202, a third acquisition unit 203, and a control unit 204.
The first obtaining unit 201 is configured to obtain a current engine speed, a current engine oil temperature, and a current outlet temperature of a coolant of an engine radiator;
the second obtaining unit 202 is configured to obtain a temperature difference between a preset engine oil temperature and the current engine oil temperature if the preset engine oil temperature is greater than the current engine oil temperature; the preset engine oil temperature is greater than a first threshold value and less than a second threshold value.
Optionally, the first threshold is a temperature at which fuel oil volatilizes, and the second threshold is a temperature at which engine oil volatilizes.
The third obtaining unit 203 is configured to obtain an opening degree of the thermostat according to the current engine speed, the temperature difference value, and the current outlet temperature of the coolant of the engine radiator;
the control unit 204 is configured to control the thermostat according to the opening degree of the thermostat.
In addition, refer to fig. 3, which is a structural diagram of another solution device for oil dilution according to the second embodiment of the present application.
The third obtaining unit 203 of the apparatus includes: a flow rate acquisition subunit 203a and an opening degree acquisition subunit 203 b.
The flow obtaining subunit 203a is configured to obtain a coolant flow and an engine oil flow according to the current engine speed.
The opening obtaining subunit 203b is configured to obtain the opening of the thermostat according to the temperature difference, the current outlet temperature of the coolant of the engine radiator, the coolant flow, and the engine oil flow.
Optionally, the opening obtaining subunit 203b specifically includes: a heat acquisition subunit 203b1 and a temperature acquisition subunit 203b 2.
The heat obtaining subunit 203b1 is configured to obtain, according to the oil flow and the temperature difference, a required heat for the current oil to reach a preset oil temperature.
The temperature obtaining subunit 203b2 is configured to obtain a target outlet temperature according to the required heat, the current outlet temperature of the coolant of the engine radiator, and the coolant flow.
The opening obtaining subunit 203b is further configured to obtain the opening of the thermostat according to the target outlet temperature.
Furthermore, the apparatus further comprises: a fourth acquisition unit 205 and a correction unit 206;
the fourth obtaining unit 205 is configured to obtain a current ambient temperature.
The correcting unit 206 is configured to correct the target liquid outlet temperature of the coolant of the engine radiator according to the current environment temperature, so as to obtain a corrected target liquid outlet temperature.
The opening obtaining subunit 203b is further configured to obtain the corrected opening of the thermostat according to the corrected target outlet temperature.
It should be noted that, the units and/or sub-units of the device according to the embodiment of the present application may be integrated on an on-board ECU (Electronic Control Unit), or may be separately provided, and the present application is not limited in this respect.
According to the engine oil dilution solving device provided by the embodiment of the application, the current engine rotating speed, the current engine oil temperature and the current liquid outlet temperature of the cooling liquid of the engine radiator are obtained through the first obtaining unit; if the preset engine oil temperature is higher than the current engine oil temperature, acquiring a temperature difference value between the preset engine oil temperature and the current engine oil temperature through a second acquisition unit; the preset engine oil temperature is greater than a first threshold and less than a second threshold; acquiring the opening degree of the thermostat according to the current engine speed, the temperature difference and the current outlet temperature of the cooling liquid of the engine radiator through a third acquisition unit; the thermostat is controlled by the control unit according to the opening degree of the thermostat, and the flow of the cooling liquid entering the engine radiator is adjusted by controlling the thermostat so as to adjust the heat dissipation capacity of the engine radiator. By means of the method, when the current engine oil temperature is lower than the preset engine oil temperature, the flow of the cooling liquid entering the engine radiator can be reduced by controlling the thermostat, the engine oil temperature is increased, fuel oil mixed into the engine oil can be volatilized, the risk of engine oil dilution is reduced, the service cycle of the engine oil is prolonged, and the engine is protected.
It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the apparatus embodiment, since it is substantially similar to the method embodiment, it is relatively simple to describe, and reference may be made to some descriptions of the method embodiment for relevant points. The above-described apparatus embodiments are merely illustrative, and the units and modules described as separate components may or may not be physically separate. In addition, some or all of the units and modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.
Claims (6)
1. A solution for dilution of engine oil, characterized in that it comprises:
acquiring the current engine speed, the current engine oil temperature and the current outlet liquid temperature of cooling liquid of an engine radiator;
if the preset engine oil temperature is higher than the current engine oil temperature, acquiring a temperature difference value between the preset engine oil temperature and the current engine oil temperature; the preset engine oil temperature is greater than a first threshold and less than a second threshold;
acquiring the opening degree of the thermostat according to the current engine speed, the temperature difference and the current outlet temperature of the cooling liquid of the engine radiator;
controlling the thermostat according to the opening degree of the thermostat;
the method comprises the following steps of obtaining the opening degree of a thermostat according to the current engine speed, the temperature difference value and the current outlet liquid temperature of cooling liquid of the engine radiator, and specifically comprises the following steps:
obtaining the flow of cooling liquid and the flow of engine oil according to the current engine speed;
acquiring the opening degree of the thermostat according to the temperature difference, the current liquid outlet temperature of the cooling liquid of the engine radiator, the flow rate of the cooling liquid and the flow rate of the engine oil;
the method comprises the following steps of obtaining the opening degree of the thermostat according to the temperature difference, the current liquid outlet temperature of cooling liquid of the engine radiator, the flow rate of the cooling liquid and the flow rate of engine oil, and specifically comprises the following steps:
acquiring the heat required by the current engine oil to reach the preset engine oil temperature according to the engine oil flow and the temperature difference;
obtaining a target liquid outlet temperature according to the required heat, the current liquid outlet temperature of the cooling liquid of the engine radiator and the flow of the cooling liquid;
and acquiring the opening degree of the thermostat according to the target liquid outlet temperature.
2. The solution to dilution of engine oil of claim 1, wherein the first threshold is a temperature at which fuel is volatilized and the second threshold is a temperature at which engine oil is volatilized.
3. The solution to oil dilution of claim 1, further comprising:
acquiring the current environment temperature;
correcting the target liquid outlet temperature of the cooling liquid of the engine radiator according to the current environment temperature to obtain the corrected target liquid outlet temperature;
and acquiring the corrected opening degree of the thermostat according to the corrected target outlet liquid temperature.
4. A solution to engine oil dilution, the apparatus comprising: the device comprises a first acquisition unit, a second acquisition unit, a third acquisition unit and a control unit;
the first obtaining unit is used for obtaining the current engine speed, the current engine oil temperature and the current liquid outlet temperature of cooling liquid of an engine radiator;
the second obtaining unit is used for obtaining a temperature difference value between the preset engine oil temperature and the current engine oil temperature if the preset engine oil temperature is greater than the current engine oil temperature; the preset engine oil temperature is greater than a first threshold and less than a second threshold;
the third obtaining unit is used for obtaining the opening degree of the thermostat according to the current engine speed, the temperature difference value and the current outlet temperature of the cooling liquid of the engine radiator;
the control unit is used for controlling the thermostat according to the opening degree of the thermostat;
the third obtaining unit includes: a flow rate obtaining subunit and an opening obtaining subunit;
the flow acquiring subunit is used for acquiring the flow of the cooling liquid and the flow of the engine oil according to the current engine rotating speed;
the opening obtaining subunit is configured to obtain an opening of the thermostat according to the temperature difference, a current outlet temperature of coolant of the engine radiator, the coolant flow, and the engine oil flow;
the opening degree obtaining subunit includes: a heat acquisition subunit and a temperature acquisition subunit;
the heat acquiring subunit is used for acquiring the heat required by the current engine oil to reach the preset engine oil temperature according to the engine oil flow and the temperature difference;
the temperature obtaining subunit is used for obtaining a target liquid outlet temperature according to the required heat, the current liquid outlet temperature of the cooling liquid of the engine radiator and the flow rate of the cooling liquid;
the opening obtaining subunit is further configured to obtain the opening of the thermostat according to the target effluent temperature.
5. The engine oil dilution resolution device of claim 4, wherein the first threshold is a temperature at which fuel is volatilized and the second threshold is a temperature at which engine oil is volatilized.
6. The engine oil dilution solving device according to claim 4, further comprising: a fourth acquisition unit and a correction unit;
the fourth obtaining unit is used for obtaining the current environment temperature;
the correction unit is used for correcting the target liquid outlet temperature of the cooling liquid of the engine radiator according to the current environment temperature to obtain the corrected target liquid outlet temperature;
and the opening obtaining subunit is further configured to obtain the corrected opening of the thermostat according to the corrected target outlet temperature.
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|---|---|---|---|---|
| CN114575959B (en) * | 2022-02-28 | 2023-03-21 | 潍柴动力股份有限公司 | Engine oil thermostat control method, vehicle, equipment and storage medium |
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