CN115234356B - Electric control piston cooling nozzle and control method - Google Patents
Electric control piston cooling nozzle and control method Download PDFInfo
- Publication number
- CN115234356B CN115234356B CN202211002963.6A CN202211002963A CN115234356B CN 115234356 B CN115234356 B CN 115234356B CN 202211002963 A CN202211002963 A CN 202211002963A CN 115234356 B CN115234356 B CN 115234356B
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- Prior art keywords
- engine
- nozzle body
- substitution rate
- alcohol substitution
- opening degree
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- 238000001816 cooling Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000006467 substitution reaction Methods 0.000 claims abstract description 41
- 125000003158 alcohol group Chemical group 0.000 claims abstract description 39
- 239000000446 fuel Substances 0.000 claims abstract description 35
- 230000009977 dual effect Effects 0.000 claims abstract description 5
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 78
- 239000010705 motor oil Substances 0.000 claims description 18
- 238000005507 spraying Methods 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 230000006835 compression Effects 0.000 description 10
- 238000007906 compression Methods 0.000 description 10
- 239000007789 gas Substances 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/06—Arrangements for cooling pistons
- F01P3/08—Cooling of piston exterior only, e.g. by jets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P2003/006—Liquid cooling the liquid being oil
-
- 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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
The invention relates to the technical field of engines, and discloses an electric control piston cooling nozzle and a control method, wherein the method comprises the following steps: judging the working mode of the engine; judging whether the engine speed and the engine load rate meet the set requirements; judging whether the alcohol substitution rate of the engine is smaller than or equal to the set alcohol substitution rate; adjusting the opening degree of the nozzle body according to the judgment result; when the operation mode of the engine is a dual fuel mode: if the engine speed and the engine load rate meet the set requirements and the alcohol substitution rate of the engine is smaller than or equal to the set alcohol substitution rate, the opening degree of the nozzle body is adjusted to be in a full-open state; and if the engine speed and the load factor do not meet the set requirements, or the alcohol substitution rate of the engine is larger than the set alcohol substitution rate, adjusting the opening degree of the nozzle body to a half-open state.
Description
Technical Field
The invention relates to the technical field of engines, in particular to an electric control piston cooling nozzle and a control method.
Background
The engine is a core component of the whole vehicle, and the diesel/methanol dual-fuel engine is one of the components, and realizes controllable, efficient and clean combustion by coordinately controlling the proportion of two fuels.
However, the higher latent heat of vaporization of methanol fuel, the evaporation during the intake and compression strokes absorbs a lot of ambient heat, thereby reducing the temperature of the in-cylinder mixture during the compression stroke; the methanol substitution rate directly affects the flame-retarding period, the combustion duration and the highest combustion temperature in a cylinder of the engine, if the methanol substitution rate is too high, insufficient oxidation, namely emission, of carbon monoxide and hydrocarbon generated by combustion is easily caused, and the piston temperature is too low, so that the fuel consumption of the whole vehicle is increased.
Therefore, how to prevent insufficient fuel combustion and too low piston temperature of a diesel/methanol dual-fuel engine is a technical problem to be solved in the art.
Disclosure of Invention
The invention provides a control method of an electric control piston cooling nozzle, which can reasonably adjust the opening of a nozzle body, and can prevent the temperature of a piston from being too low under the condition that the fuel of a diesel/methanol dual-fuel engine can be fully combusted, so that the combustion efficiency and the service life of the diesel/methanol dual-fuel engine are improved.
In order to achieve the above purpose, the present invention provides the following technical solutions:
an electric control piston cooling nozzle control method is suitable for a diesel/methanol dual-fuel engine, and comprises the following steps:
judging the working mode of the engine;
judging whether the engine speed and the engine load rate meet the set requirements;
judging whether the alcohol substitution rate of the engine is smaller than or equal to the set alcohol substitution rate;
adjusting the opening degree of the nozzle body according to the judgment result;
when the operation mode of the engine is a dual fuel mode: if the engine speed and the engine load rate meet the set requirements and the alcohol substitution rate of the engine is smaller than or equal to the set alcohol substitution rate, the opening degree of the nozzle body is adjusted to be in a full-open state;
and if the engine speed and the load factor do not meet the set requirements, or the alcohol substitution rate of the engine is larger than the set alcohol substitution rate, adjusting the opening degree of the nozzle body to a half-open state.
The invention provides a control method of an electric control piston cooling nozzle, which comprises the following steps:
firstly, judging the working mode of an engine;
if the working mode of the engine is a dual-fuel mode, continuing to judge the rotating speed and the load factor of the engine;
if the rotating speed and the load rate of the engine meet the set requirements, continuously judging the alcohol substitution rate of the engine;
when the alcohol substitution rate of the engine is smaller than or equal to the set alcohol substitution rate, the methanol fuel content of the engine is relatively small, so that a large amount of surrounding heat cannot be evaporated and absorbed in the air intake and compression strokes, the temperature generated by combustion of the mixed gas in the cylinder is high in the compression strokes, combustion is very sufficient, a large amount of engine oil is needed for cooling the piston to avoid phenomena of knocking and knocking, and therefore the opening degree of the nozzle body is adjusted to be in a full-open state, so that more engine oil is sprayed to the piston for cooling.
On the contrary, when the alcohol substitution rate of the engine is larger than the set alcohol substitution rate, the methanol fuel content of the engine is relatively high, so that a large amount of surrounding heat can be evaporated and absorbed in the air intake and compression strokes, the temperature generated by combustion of the mixed gas in the cylinder is low in the compression strokes, and the piston is cooled only by a small amount of engine oil to avoid insufficient combustion caused by further reduction of the combustion temperature, so that the opening degree of the nozzle body is adjusted to be in a half-open state, and a small amount of engine oil is sprayed to the piston.
The setting mode can reasonably adjust the opening of the nozzle body, and can prevent the temperature of the piston from being too low under the condition that the fuel of the diesel/methanol dual-fuel engine can be fully combusted, thereby improving the combustion efficiency and the service life of the diesel/methanol dual-fuel engine.
Optionally, the setting the requirement includes: the engine speed is greater than the set speed and the engine load factor is greater than the set load factor.
Optionally, adjusting the opening degree of the nozzle body according to the determination result further includes: when the operating mode of the engine is a pure diesel mode: the nozzle body is implemented according to the strategy of the diesel engine electric control cooling nozzle.
An electric control piston cooling nozzle suitable for any one of the methods comprises a nozzle body, an electromagnetic valve and an electric control unit; the nozzle body is used for spraying engine oil to cool a piston of the engine; the electric control unit is in signal connection with the engine and the electromagnetic valve; the electronic control unit is used for detecting information of the working mode, the rotating speed, the load rate and the alcohol substitution rate of the engine and driving the electromagnetic valve to adjust the opening of the nozzle body according to the method.
An electronically controlled piston cooling nozzle control method comprising: judging the water temperature and the oil temperature of the engine; judging the smaller temperature value and the set temperature in the water temperature and the oil temperature of the engine; judging the exhaust temperature of the engine and the set exhaust temperature; and adjusting the opening degree of the nozzle body according to the judging result.
Optionally, adjusting the opening degree of the nozzle body according to the determination result specifically includes: if the smaller temperature value of the engine water temperature and the engine oil temperature is larger than the set temperature or the engine exhaust temperature is larger than the set exhaust temperature, the opening degree of the nozzle body is adjusted to be in a full-open state; and if the smaller temperature value of the water temperature and the oil temperature of the engine is smaller than or equal to the set temperature and the exhaust temperature of the engine is smaller than or equal to the set exhaust temperature, adjusting the opening degree of the nozzle body to a half-open state.
An electric control piston cooling nozzle is applicable to the method and comprises a nozzle body, an electromagnetic valve and an electric control unit; the nozzle body is used for spraying engine oil to cool a piston of the engine; the electric control unit is in signal connection with the engine and the electromagnetic valve; the electronic control unit is used for detecting the water temperature of the engine, the temperature of engine oil and the temperature of exhaust gas of the engine, and driving the electromagnetic valve to adjust the opening degree of the nozzle body according to the method.
Drawings
FIG. 1 is a schematic flow chart of a control method for an electrically controlled piston cooling nozzle according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an electric control piston cooling nozzle according to an embodiment of the present invention mounted on a piston.
Icon: 1-a nozzle body; 2-an electromagnetic valve; 3-an electronic control unit.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a control method of an electric control piston cooling nozzle, which is suitable for a diesel/methanol dual-fuel engine and comprises the following steps:
step S100, judging the working mode of the engine;
step S200, judging whether the engine speed and the engine load rate meet the set requirements;
step S300, judging whether the alcohol substitution rate of the engine is smaller than or equal to a set alcohol substitution rate;
step S400, adjusting the opening degree of the nozzle body according to the judging result;
when the operation mode of the engine is a dual fuel mode:
step S401, if the engine speed and the engine load rate meet the set requirements and the alcohol substitution rate of the engine is smaller than or equal to the set alcohol substitution rate, adjusting the opening degree of the nozzle body to a full-open state;
in step S402, if the engine speed and the load factor do not meet the set requirements, or if the alcohol substitution rate of the diesel engine is greater than the set alcohol substitution rate, the opening degree of the nozzle body is adjusted to a half-open state.
Wherein, the setting requirement includes: the engine speed is greater than the set speed and the engine load factor is greater than the set load factor.
Fig. 1 is a schematic flow chart of a control method for an electric control piston cooling nozzle according to an embodiment of the present invention, as shown in fig. 1, the following specifically explains the steps of the control method for an electric control piston cooling nozzle:
the working mode of the engine is a dual-fuel mode, namely, diesel oil and methanol fuel can participate in the combustion in a cylinder of the engine, so that the problem of higher gasification latent heat of the methanol fuel is naturally needed to be considered.
The rotating speed of the engine is larger than the set rotating speed, and the engine load factor is larger than the set load factor, which indicates that the methanol flame propagation speed is high and the methanol fuel has high oxygen content, so that the in-cylinder combustion can be more sufficient;
the rotating speed of the engine is smaller than or equal to the set rotating speed, the engine load rate is larger than the set load rate, which indicates that the methanol has insufficient oxygen content, and the combustion of the methanol can be insufficient due to the larger vaporization latent heat of the methanol;
the alcohol substitution rate of the engine is smaller than or equal to the set alcohol substitution rate, which indicates that the methanol fuel content of the engine is relatively low at the moment, so that a large amount of heat around the engine cannot be evaporated and absorbed in the air inlet and compression stroke, the temperature generated by combustion of the mixed gas in the cylinder is high in the compression stroke, and the combustion in the cylinder is very sufficient;
when the alcohol substitution rate of the engine is larger than the set alcohol substitution rate, the fact that the methanol fuel content of the engine is relatively high at the moment is indicated, so that a large amount of heat around the engine can be evaporated and absorbed in the air inlet and compression stroke, the temperature generated by combustion of the mixed gas in the cylinder is low in the compression stroke, and the combustion in the cylinder is insufficient;
thus, when the operating mode of the engine is a dual fuel mode: only when the rotation speed of the engine is larger than the set rotation speed, the engine load rate is larger than the set load rate, and the alcohol substitution rate of the engine is larger than or equal to the alcohol substitution rate, the opening degree of the nozzle body is required to be adjusted to be in a full-open state, so that more engine oil is sprayed to the piston for cooling, and the phenomena of deflagration and knocking are avoided.
On the contrary, when the working mode of the engine is a dual-fuel mode and at least one of the conditions is not satisfied, the opening degree of the nozzle body is adjusted to be in a half-open state so as to enable a small amount of engine oil to be sprayed to the piston, thereby preventing the combustion temperature from being further reduced and further causing insufficient combustion and over-low temperature of the piston.
Therefore, the electronic control piston cooling nozzle control method can reasonably adjust the opening of the nozzle body, and can prevent the temperature of the piston from being too low under the condition that the fuel of the diesel/methanol dual-fuel engine can be fully combusted, so that the combustion efficiency and the service life of the diesel/methanol dual-fuel engine are improved.
Referring to fig. 1, as an alternative embodiment, the electronically controlled piston cooling nozzle control method further comprises the steps of:
when the operating mode of the engine is a pure diesel mode:
step S403, the nozzle body is executed according to the strategy of the diesel engine electric control cooling nozzle.
In this embodiment, if the engine is in the pure diesel mode, only diesel will participate in the combustion in the cylinder of the engine, so that the problem of high vaporization latent heat of the methanol fuel is naturally not needed to be considered, and the nozzle body is only required to be executed according to the fuel injection strategy of the common diesel engine.
Fig. 2 is a schematic structural view of an electric control piston cooling nozzle provided in an embodiment of the present invention mounted on a piston, and as shown in fig. 2, the embodiment of the present invention further provides an electric control piston cooling nozzle, which is suitable for any one of the above methods, and includes a nozzle body 1, an electromagnetic valve 2, and an electric control unit 3; wherein the nozzle body 1 is used for ejecting engine oil to cool a piston of an engine; the electric control unit 3 is in signal connection with the engine and the electromagnetic valve 2; the electronic control unit 3 is used for detecting information of the working mode, the rotating speed, the load factor and the alcohol substitution rate of the engine, and driving the electromagnetic valve 2 to adjust the opening degree of the nozzle body 1 according to the method.
In this embodiment, the electronic control unit 3 is configured to facilitate detection and judgment of the working mode, the rotation speed, the load factor and the alcohol substitution rate of the engine according to the above method; the electromagnetic valve 2 is arranged, and the opening degree of the nozzle body 1 can be accurately adjusted, so that the working efficiency of the electric control piston cooling nozzle is improved.
The embodiment of the invention also provides another control method of the electric control piston cooling nozzle, which comprises the following steps:
judging the water temperature and the oil temperature of the engine;
judging the smaller temperature value and the set temperature in the water temperature and the oil temperature of the engine;
judging the exhaust temperature of the engine and the set exhaust temperature;
according to the judging result, the opening degree of the nozzle body is regulated, and the method specifically comprises the following steps:
if the smaller temperature value of the engine water temperature and the engine oil temperature is larger than the set temperature or the engine exhaust temperature is larger than the set exhaust temperature, the opening degree of the nozzle body is adjusted to be in a full-open state;
and if the smaller temperature value of the water temperature and the oil temperature of the engine is smaller than or equal to the set temperature and the exhaust temperature of the engine is smaller than or equal to the set exhaust temperature, adjusting the opening degree of the nozzle body to a half-open state.
In this embodiment, if the smaller temperature value of the engine water temperature and the engine oil temperature is greater than the set temperature or the engine exhaust temperature is greater than the set exhaust temperature, this indicates that the engine temperature is higher at this time, and a large amount of engine oil is required to cool, so that the opening of the nozzle body is adjusted to a fully open state; on the contrary, if the smaller temperature value of the engine water temperature and the engine oil temperature is smaller than or equal to the set temperature and the engine exhaust temperature is smaller than or equal to the set exhaust temperature, the engine temperature is good at the moment, and great cooling is not needed, so that the opening degree of the nozzle body is adjusted to be in a half-open state.
The embodiment of the invention also provides another electric control piston cooling nozzle which is suitable for the method and comprises a nozzle body, an electromagnetic valve and an electric control unit; the nozzle body is used for spraying engine oil to cool a piston of the engine; the electric control unit is in signal connection with the engine and the electromagnetic valve; the electronic control unit is used for detecting the water temperature of the engine, the temperature of engine oil and the temperature of exhaust gas of the engine, and driving the electromagnetic valve to adjust the opening degree of the nozzle body according to the method.
Referring again to fig. 2, in this embodiment, the effect of the electric control piston cooling nozzle is similar to that described above, and will not be repeated.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (4)
1. The control method of the electric control piston cooling nozzle is suitable for a diesel/methanol dual-fuel engine and is characterized by comprising the following steps of:
judging the working mode of the engine;
judging whether the engine speed and the engine load rate meet the set requirements;
judging whether the alcohol substitution rate of the engine is smaller than or equal to the set alcohol substitution rate;
according to the judging result, the opening degree of the nozzle body is regulated, and the method specifically comprises the following steps:
when the operation mode of the engine is a dual fuel mode: if the engine speed and the engine load rate meet the set requirements and the alcohol substitution rate of the engine is smaller than or equal to the set alcohol substitution rate, the opening degree of the nozzle body is adjusted to be in a full-open state;
and if the rotating speed and the load factor of the engine do not meet the set requirements, or the alcohol substitution rate of the engine is larger than the set alcohol substitution rate, adjusting the opening degree of the nozzle body to a half-open state.
2. The method of controlling an electronically controlled piston cooling nozzle of claim 1, wherein the set requirements include:
the engine speed is greater than the set speed and the engine load factor is greater than the set load factor.
3. The method for controlling an electronically controlled piston cooling nozzle as set forth in claim 1, wherein said adjusting the opening degree of the nozzle body according to the determination result further comprises:
when the operating mode of the engine is a pure diesel mode:
the nozzle body is implemented according to the strategy of the diesel engine electric control cooling nozzle.
4. An electronically controlled piston cooling nozzle adapted for use in a method according to any one of claims 1 to 3, comprising a nozzle body, a solenoid valve and an electronic control unit; wherein,
the nozzle body is used for spraying engine oil to cool a piston of the engine;
the electric control unit is in signal connection with the engine and the electromagnetic valve;
the electronic control unit is used for detecting information of the working mode, the rotating speed, the load rate and the alcohol substitution rate of the engine, and driving the electromagnetic valve to adjust the opening degree of the nozzle body according to the method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211002963.6A CN115234356B (en) | 2022-08-19 | 2022-08-19 | Electric control piston cooling nozzle and control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211002963.6A CN115234356B (en) | 2022-08-19 | 2022-08-19 | Electric control piston cooling nozzle and control method |
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| CN115234356A CN115234356A (en) | 2022-10-25 |
| CN115234356B true CN115234356B (en) | 2024-01-12 |
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