CN114810271B - Control method for engine system and engine system - Google Patents
Control method for engine system and engine system Download PDFInfo
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- CN114810271B CN114810271B CN202210511100.5A CN202210511100A CN114810271B CN 114810271 B CN114810271 B CN 114810271B CN 202210511100 A CN202210511100 A CN 202210511100A CN 114810271 B CN114810271 B CN 114810271B
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000003921 oil Substances 0.000 claims abstract description 49
- 239000010705 motor oil Substances 0.000 claims abstract description 39
- 239000007921 spray Substances 0.000 claims abstract description 19
- 238000002347 injection Methods 0.000 claims abstract description 16
- 239000007924 injection Substances 0.000 claims abstract description 16
- 230000001276 controlling effect Effects 0.000 claims description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 230000001105 regulatory effect Effects 0.000 claims description 17
- 230000032683 aging Effects 0.000 claims description 7
- 239000000446 fuel Substances 0.000 claims description 3
- 230000001050 lubricating effect Effects 0.000 abstract description 6
- -1 and at the moment Substances 0.000 abstract 1
- 239000010687 lubricating oil Substances 0.000 description 14
- 238000002474 experimental method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 4
- 102100023174 Methionine aminopeptidase 2 Human genes 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
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- 101000969594 Homo sapiens Modulator of apoptosis 1 Proteins 0.000 description 2
- 102100021440 Modulator of apoptosis 1 Human genes 0.000 description 2
- 101100131116 Oryza sativa subsp. japonica MPK3 gene Proteins 0.000 description 2
- 101100456045 Schizosaccharomyces pombe (strain 972 / ATCC 24843) map3 gene Proteins 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 102100028379 Methionine aminopeptidase 1 Human genes 0.000 description 1
- 101710161855 Methionine aminopeptidase 1 Proteins 0.000 description 1
- 108090000192 Methionyl aminopeptidases Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
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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
- F01M1/00—Pressure lubrication
- F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
-
- 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
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
-
- 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
- F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a control method for an engine system and the engine system. The control method for an engine system includes: recording the duration after the engine is started; judging whether the duration is smaller than a first set duration; if the duration is smaller than the first set duration, controlling the solenoid valve to be powered off and controlling the piston nozzle to spray oil; and if the duration time is longer than or equal to the first set time, controlling the electromagnetic valve according to the engine operation parameters. Specifically, when the duration after the engine is started is smaller than the first set duration, at the moment, the electromagnetic valve is controlled to be powered off to enable the piston nozzle to spray oil, and at the moment, engine oil sprayed out of the piston nozzle is used for lubricating the structure of the piston, so that the working performance of the piston is improved; when the duration time after the engine is started is longer than or equal to the set duration time, the opening of the electromagnetic valve is controlled through the operation parameters of the engine, so that the oil injection quantity of the piston nozzle is accurately controlled, and the service performance of an engine system is effectively improved.
Description
Technical Field
The present invention relates to the field of engine systems, and in particular, to a control method for an engine system and an engine system.
Background
The piston nozzle belongs to a lubricating system of an engine, and is generally arranged on an oil duct of the engine, and the piston nozzle sprays cooling engine oil to a piston with higher thermal load in the running process of the engine.
In the existing control method, a control valve is arranged between a piston nozzle and an oil duct, the control valve is mostly a mechanical valve and an electromagnetic valve, and the opening of the control valve is adjusted to control the oil injection quantity of the piston nozzle. The existing control method for controlling the fuel injection quantity of the piston nozzle through the electromagnetic valve does not consider the influence of the duration time after the engine is started on the engine system, so that the control accuracy of the control method is low, and the reliability of the engine system is low.
Disclosure of Invention
The invention aims to provide a control method for an engine system and the engine system, which are used for solving the problem of low control precision of the control method in the prior art.
To achieve the purpose, the invention adopts the following technical scheme:
a control method for an engine system, comprising:
recording the duration after the engine is started;
judging whether the duration is smaller than a first set duration or not;
if the duration is smaller than the first set duration, controlling the solenoid valve to be powered off and controlling the piston nozzle to spray oil;
if the duration is longer than or equal to the first set duration, controlling the electromagnetic valve according to the engine operation parameters;
wherein the engine operating parameters include at least: exhaust temperature, oil pressure, water temperature, and in-cylinder temperature of the piston cylinder.
Preferably, the specific steps of controlling the solenoid valve in accordance with engine operating parameters include:
judging whether the exhaust temperature is greater than a first temperature set value; judging whether the engine oil pressure is larger than a first pressure set value or not; judging whether the water temperature is greater than a second temperature set value; judging whether the temperature in the piston cylinder is greater than a third temperature set value;
and if the exhaust temperature is greater than the first temperature set value, the engine oil pressure is greater than the first pressure set value, the water temperature is greater than the second temperature set value, and the temperature in the cylinder of the piston cylinder is greater than the third temperature set value, controlling the electromagnetic valve to be powered off, and controlling the piston nozzle to spray oil.
Preferably, the specific step of controlling the solenoid valve according to the engine operating parameters further comprises:
if the exhaust temperature is less than or equal to the first temperature set value, the engine oil pressure is less than or equal to the first pressure set value, the water temperature is less than or equal to the second temperature set value, and the temperature in the cylinder of the piston cylinder is less than or equal to the third temperature set value, judging whether the duration is longer than a second set duration;
and if the duration is longer than the second set duration, controlling the solenoid valve to be powered off and controlling the piston nozzle to spray oil.
Preferably, the specific step of controlling the solenoid valve according to the engine operating parameters further comprises:
if the duration is longer than the first set duration;
if the exhaust temperature is greater than or equal to the first temperature set value, determining a first adjustment coefficient according to the exhaust temperature, and adjusting the opening of the electromagnetic valve according to the first adjustment coefficient;
if the engine oil pressure is larger than or equal to the first pressure set value, determining a second regulating coefficient according to the engine oil pressure, and regulating the opening of the electromagnetic valve according to the second regulating coefficient;
if the water temperature is greater than or equal to the second temperature set value, determining a third adjusting coefficient according to the water temperature, and adjusting the opening of the electromagnetic valve according to the third adjusting coefficient;
and if the temperature in the cylinder of the piston cylinder is greater than or equal to the third temperature set value, determining a fourth regulating coefficient according to the temperature in the cylinder of the piston cylinder, and regulating the opening of the electromagnetic valve according to the fourth regulating coefficient.
Preferably, before controlling the solenoid valve according to the engine operating parameter, the method further comprises:
and correcting the opening of the electromagnetic valve according to the output voltage of the electromagnetic valve, the viscosity of engine oil and the aging degree of the electromagnetic valve.
Preferably, the control method for an engine system further includes:
when the circuit of the electromagnetic valve is electrified, judging whether the circuit of the electromagnetic valve is a passage, and if the electromagnetic valve is short-circuited or open-circuited, reporting the circuit fault of the electromagnetic valve.
Preferably, the control method for an engine system further includes:
judging whether the engine oil pressure is smaller than a second pressure set value or not;
if the engine oil pressure is smaller than the second pressure set value, reporting the fault of the electromagnetic valve;
wherein the second pressure set point is less than the first pressure set point.
Preferably, the control method for an engine system further includes:
when the piston nozzle sprays oil, judging whether the load of the engine in the previous working condition is larger than the set load or not, and judging whether the rotating speed of the engine is larger than the set rotating speed or not;
and if the engine load is greater than the set load and the engine rotating speed is greater than the set rotating speed in the previous working condition, delaying a third set duration to control the electromagnetic valve in the current working condition.
Preferably, the range of the oil injection duration of the oil injection of the piston nozzle is controlled as follows: 30 s-120 s.
An engine system to which the control method for an engine system described above is applied.
The invention has the beneficial effects that:
an object of the present invention is to provide a control method for an engine system, the control method for an engine system including: recording the duration after the engine is started; judging whether the duration is smaller than a first set duration; if the duration is smaller than the first set duration, controlling the solenoid valve to be powered off and controlling the piston nozzle to spray oil; and if the duration time is longer than or equal to the first set time, controlling the electromagnetic valve according to the engine operation parameters. Specifically, the oil pump and the piston nozzle are communicated through the electromagnetic valve, when the duration after the engine is started is smaller than the first set duration, at the moment, the electromagnetic valve is controlled to be powered off to enable the piston nozzle to spray oil, and at the moment, the engine oil sprayed out of the piston nozzle is used for lubricating the structure of the piston, so that the working performance of the piston is improved; after the duration time of the engine after starting is longer than or equal to the set duration time, it can be understood that the temperature in the piston is higher at the moment, and the opening degree of the electromagnetic valve is controlled through the operation parameters of the engine so as to accurately control the oil injection quantity of the piston nozzle, thereby effectively improving the service performance of an engine system.
The invention further provides an engine system, and the engine system is applied to the control method for the engine system, so that the service performance of the engine system is effectively improved.
Drawings
FIG. 1 is a schematic illustration of a portion of an engine system provided in accordance with an embodiment of the present invention;
FIG. 2 is a flow chart of a control method for an engine system provided by an embodiment of the present invention.
In the figure:
1. an oil pump; 2. an electromagnetic valve; 3. a piston nozzle.
Detailed Description
In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments 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.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The invention provides an engine system, as shown in fig. 1, which comprises an oil pump 1, an electromagnetic valve 2 and a piston, wherein an input port of the electromagnetic valve 2 is used for being communicated with an output port of the oil pump 1, and an output port of the electromagnetic valve 2 is used for being communicated with a piston nozzle 3 of the piston. Specifically, the oil pump 1 is mounted on a piston cylinder (not shown in the figure) through an electromagnetic valve 2, the inner rotor of the oil pump 1 is directly driven to rotate by a crankshaft (not shown in the figure), lubricating oil is respectively pumped into an input port of the electromagnetic valve 2, and then the lubricating oil is conveyed to the piston nozzle 3 through a piston cooling nozzle oil duct through an output port of the electromagnetic valve 2; the amount of lubricating oil flowing into the piston cooling nozzle oil passage can be controlled by the electromagnetic valve 2, specifically, when the electromagnetic valve 2 is in a fully-opened state, the lubricating oil pump 1 and the piston nozzle 3 are directly communicated, the flow rate of the lubricating oil which is conveyed to the piston nozzle 3 by the lubricating oil pump 1 is maximum, when the electromagnetic valve 2 is in a fully-closed state, the lubricating oil which is not conveyed to the piston nozzle 3 by the lubricating oil pump 1 can be understood, and as the opening degree of the electromagnetic valve 2 is continuously increased, the more the amount of the lubricating oil which is conveyed to the piston nozzle 3 in unit time is.
Specifically, in the present embodiment, a proportional solenoid valve is used as the solenoid valve 2.
The specific structures of the oil pump 1, the electromagnetic valve 2 and the piston nozzle 3 belong to the prior art, and are not described herein.
The present invention also provides a control method for an engine system, as shown in fig. 2, comprising:
s100, starting the engine system.
And S200, recording the duration time after the engine is started.
Specifically, the engine system further includes a timer for recording a duration of time after the engine system is started.
S300, judging whether the duration is smaller than a first set duration.
If the duration is less than the first set duration, S310 is performed; if the duration is greater than or equal to the first set duration, S320 is performed.
S310, controlling the solenoid valve 2 to be powered off and controlling the piston nozzle 3 to spray oil.
Specifically, when the duration after the engine is started is smaller than the first set duration, at this time, the solenoid valve 2 is controlled to be powered off to enable the piston nozzle 3 to spray oil, and at this time, the engine oil sprayed out of the piston nozzle 3 is used for lubricating the structure of the piston, so that the working performance of the piston in subsequent work is improved.
Specifically, the range of the oil injection duration of the oil injection of the piston nozzle 3 is controlled as follows: 30 s-120 s. To ensure that the pistons are lubricated in place. It can be understood that the oil injection duration of the oil injection of the piston nozzle 3 can also be adaptively adjusted and controlled according to the actual working condition of the vehicle.
The first set time length is an empirical value obtained by a large number of early experiments.
S320, controlling the electromagnetic valve 2 according to the engine operation parameters.
Wherein the engine operating parameters include at least: exhaust temperature, oil pressure, water temperature, and in-cylinder temperature of the piston cylinder. It is understood that other parameters may be adaptively added according to the actual conditions of the vehicle.
Specifically, when the duration after the engine is started is longer than or equal to the set duration, it can be understood that the temperature in the piston is higher at this time, and the opening of the electromagnetic valve 2 is controlled by the operation parameters of the engine, so as to realize accurate oil injection quantity of the piston nozzle 3, thereby effectively improving the service performance of the engine system.
Specifically, the specific steps of controlling the solenoid valve 2 in accordance with the engine operating parameters include:
s321, judging whether the exhaust temperature is greater than a first temperature set value; judging whether the engine oil pressure is larger than a first pressure set value; judging whether the water temperature is greater than a second temperature set value; and judging whether the temperature in the piston cylinder is greater than a third temperature set value.
If the exhaust temperature is greater than the first temperature set point, the oil pressure is greater than the first pressure set point, the water temperature is greater than the second temperature set point, and the in-cylinder temperature of the piston cylinder is greater than the third temperature set point, then S3211 occurs.
If the exhaust temperature is equal to or lower than the first temperature set point, the engine oil pressure is equal to or lower than the first pressure set point, the water temperature is equal to or lower than the second temperature set point, and the in-cylinder temperature of the piston cylinder is equal to or lower than the third temperature set point, then S3212 is performed.
S3211, controlling the solenoid valve 2 to be powered off and controlling the piston nozzle 3 to spray oil.
It can be understood that when the duration after the engine is started is longer than or equal to the first set duration, the temperature of the piston is continuously increased along with the continuous increase of the duration, at this time, if it is determined that the exhaust temperature is greater than the first temperature set value, the engine oil pressure is greater than the first pressure set value, the water temperature is greater than the second temperature set value, and the temperature in the cylinder of the piston cylinder is greater than the third temperature set value, it is indicated that the temperature of the piston is higher, and the electromagnetic valve 2 is required to be controlled to enable the engine oil pump 1 to be communicated with the piston nozzle 3, so that engine oil is pumped to the piston nozzle 3 through the engine oil pump 1, and the piston nozzle 3 sprays oil to cool the piston.
It can be understood that when the solenoid valve 2 is in the power-off state, the opening of the solenoid valve 2 is the largest at this time, and the engine oil pumped by the engine oil pump 1 can be directly pumped to the piston through the solenoid valve 2 for spraying, so as to quickly and effectively cool the piston.
S3212, judging whether the duration is longer than a second set duration.
If the duration time is longer than the second set time, the electromagnetic valve 2 is controlled to be powered off, and the piston nozzle 3 is controlled to spray oil.
It can be appreciated that when the duration after the engine is started is longer than the first set duration, the operating parameters of the engine system are as follows: the exhaust temperature is smaller than or equal to a first temperature set value, the engine oil pressure is smaller than or equal to a first pressure set value, the water temperature is smaller than or equal to a second temperature set value, and the temperature in a cylinder of a piston cylinder is smaller than or equal to a third temperature set value, until the duration of an engine after the engine is started is longer than a second set duration, which indicates that the duration of an engine system under the operation parameters is long enough, in this case, the working duration of a piston is long enough, the solenoid valve 2 needs to be controlled to be powered off, so that the opening of the solenoid valve 2 reaches the maximum, engine oil pumped by the engine oil pump 1 can be directly pumped to the piston nozzle 3 through the solenoid valve 2, and lubricating oil sprayed by the piston nozzle 3 is used for lubricating the structure of the piston, so that the working performance of the piston in subsequent working is improved; it will be appreciated that the portion of the lubricating oil sprayed from the piston nozzle 3 can cool the piston, based on the structure of the lubricating piston.
If the duration is longer than the first set period, if the exhaust temperature is equal to or higher than the first temperature set point, S3213 is performed. It is understood that the duration is longer than the first set duration and shorter than the second set duration.
S3213, determining a first adjustment coefficient according to the exhaust temperature, and adjusting the opening of the electromagnetic valve 2 according to the first adjustment coefficient.
Specifically, the exhaust temperature is divided into a plurality of exhaust temperature sections, each of which corresponds to a first adjustment coefficient, so as to achieve adjustment of the opening degree of the solenoid valve 2 by the first adjustment coefficient, and it is understood that as the exhaust temperature increases, the value of the first adjustment coefficient increases. Wherein, the specific value of the first adjustment coefficient is an empirical value obtained by a plurality of experiments in the earlier stage.
If the duration is longer than the first set duration, if the oil pressure is equal to or higher than the first pressure set value, S3214 is performed. It is understood that the duration is longer than the first set duration and shorter than the second set duration.
S3214, determining a second regulating coefficient according to the engine oil pressure, and regulating the opening of the electromagnetic valve 2 according to the second regulating coefficient.
Specifically, the oil pressure is divided into a plurality of pressure sections, each of which corresponds to a second adjustment coefficient, so as to achieve adjustment of the opening degree of the solenoid valve 2 by the second adjustment coefficient, and it is understood that as the oil pressure increases, the value of the second adjustment coefficient increases. Wherein, the specific value of the second adjustment coefficient is an empirical value obtained by a plurality of experiments in the earlier stage.
If the duration is longer than the first set duration, if the water temperature is greater than or equal to the second temperature set value, S3215. It is understood that the duration is longer than the first set duration and shorter than the second set duration.
S3215, determining a third adjusting coefficient according to the water temperature, and adjusting the opening of the electromagnetic valve 2 according to the third adjusting coefficient.
Specifically, the water temperature is divided into a plurality of water temperature sections, each of which corresponds to a third adjustment coefficient, so as to achieve the adjustment of the opening of the solenoid valve 2 by the third adjustment coefficient, and it is understood that as the water temperature increases, the value of the third adjustment coefficient increases. Wherein, the specific value of the third regulating coefficient is an empirical value obtained by a plurality of tests in the earlier stage.
If the duration is longer than the first set duration, if the in-cylinder temperature of the piston cylinder is equal to or higher than the third temperature set value, S3216. It is understood that the duration is longer than the first set duration and shorter than the second set duration.
S3216, determining a fourth adjustment coefficient according to the temperature in the cylinder of the piston cylinder, and adjusting the opening of the electromagnetic valve 2 according to the fourth adjustment coefficient.
Specifically, the in-cylinder temperature of the piston cylinder is divided into a plurality of in-cylinder temperature intervals, each of which corresponds to a fourth adjustment coefficient, so as to realize the adjustment of the opening degree of the solenoid valve 2 by the fourth adjustment coefficient, it being understood that as the in-cylinder temperature increases continuously, the value of the fourth adjustment coefficient increases continuously. Wherein, the specific value of the fourth regulating coefficient is an empirical value obtained by a plurality of experiments in the earlier stage.
Wherein, steps S3211 to S3216 are not sequenced. The present embodiment exemplifies only that steps S3211 to S3216 are sequentially performed.
Specifically, when the duration is longer than the first set duration, if two or three of the exhaust temperature is equal to or lower than the first temperature set value, the engine oil pressure is equal to or lower than the first pressure set value, the water temperature is equal to or lower than the second temperature set value, and the in-cylinder temperature of the piston cylinder is equal to or lower than the third temperature set value, the adjustment coefficient I for adjusting the opening of the electromagnetic valve 2 is the product of the corresponding adjustment coefficients under each condition. For example, if the duration is longer than the first set duration and the exhaust temperature is equal to or lower than the first temperature set value and the engine oil pressure is equal to or lower than the first pressure set value, the adjustment coefficient i=i1×i2 for adjusting the opening of the solenoid valve 2 is adjusted, where I1 is a first adjustment coefficient, I2 is a second adjustment coefficient, and I is an adjustment coefficient for adjusting the opening of the solenoid valve 2.
In order to avoid the influence of the output voltage of the solenoid valve 2, the viscosity of the engine oil, and the aging degree of the solenoid valve 2 on the accuracy of the opening degree of the solenoid valve 2, step S400 is further included before controlling the solenoid valve 2 according to the engine operating parameters.
S400, correcting the opening of the electromagnetic valve 2 according to the output voltage of the electromagnetic valve 2, the engine oil viscosity and the aging degree of the electromagnetic valve 2. So arranged as to achieve a further accurate adjustment of the opening of the solenoid valve 2.
Specifically, the specific steps of correcting the opening degree of the solenoid valve 2 in accordance with the output voltage of the ECU, the viscosity of the engine oil, and the degree of aging of the solenoid valve 2 include S410 to S430.
S410, correcting the opening degree of the electromagnetic valve 2 according to the output voltage of the electromagnetic valve 2.
Specifically, MAP1 of the output voltage of the solenoid valve 2 and the opening degree of the solenoid valve 2 are obtained from a large number of experiments in the early stage, and the fifth adjustment coefficient is determined based on MAP 1. The specific process of determining the fifth adjustment coefficient according to MAP1 belongs to the prior art, and is not described herein.
S420, correcting the opening of the electromagnetic valve 2 according to the engine oil viscosity.
Specifically, MAP2 of the oil viscosity and the opening degree of the solenoid valve 2 is obtained from a large number of experiments in the early stage, and the sixth adjustment coefficient is determined based on MAP 2. The specific process of determining the sixth adjustment coefficient according to MAP2 belongs to the prior art, and is not described herein.
S430, correcting the opening degree of the electromagnetic valve 2 according to the aging degree of the electromagnetic valve 2.
Specifically, MAP3 of the degree of aging of the solenoid valve 2 and the opening degree of the solenoid valve 2 is obtained from a large number of experiments in the early stage, and the seventh adjustment coefficient is determined based on MAP 3. The specific process of determining the seventh adjustment coefficient according to the MAP3 belongs to the prior art, and will not be described herein.
Specifically, steps S410 to S430 are not sequenced. The present embodiment only exemplarily gives that steps S410 to S430 are sequentially performed.
In order to avoid the phenomenon that the engine system cannot work normally caused by the circuit fault of the electromagnetic valve 2, the control method for the engine system further includes step S500.
S500, when the electromagnetic valve 2 is electrified, judging whether a circuit of the electromagnetic valve 2 is a passage, and if the electromagnetic valve 2 is short-circuited or open-circuited, reporting a circuit fault of the electromagnetic valve 2.
So arranged, in order to determine whether the circuit in which the solenoid valve 2 is located can work normally.
Specifically, step S500 may be applied between any adjacent two steps of steps S100 to S3216 of the control method for an engine system.
In order to avoid the phenomenon that the engine system cannot work normally due to the failure of the solenoid valve 2 itself, the control method for the engine system further includes step S600.
And S600, judging whether the oil pressure value is smaller than a second pressure set value or not when the piston nozzle 3 sprays oil, and if the oil pressure is smaller than the second pressure set value, reporting the fault of the electromagnetic valve 2.
Wherein the second pressure set point is less than the first pressure set point.
It is understood that if the oil pressure is smaller than the second pressure set value, the amount of the lubricating oil flowing through the solenoid valve 2 cannot be controlled by adjusting the opening degree of the solenoid valve 2, wherein in the present embodiment, the solenoid valve 2 malfunction mainly includes the solenoid valve 2 stuck or the solenoid valve 2 leaking. So arranged as to determine whether the solenoid valve 2 itself is functioning properly. It will be appreciated that step S500 may be performed during each injection of fuel from the piston nozzle 3.
It will be appreciated that the present condition is initiated when the previous condition is completed. In order to avoid excessive injection of lubricating oil caused by a short time interval between the start of the control of the action of the electromagnetic valve 2 and the end of the operation of the electromagnetic valve 2 in the previous working condition after the end of the previous working condition is carried out, the control method for the engine system further comprises the following steps.
Judging whether the load of the engine is larger than the set load or not in the previous working condition, and judging whether the rotating speed of the engine is larger than the set rotating speed or not; if the engine load is greater than the set load and the engine speed is greater than the set speed in the previous working condition, the third set duration is delayed to control the electromagnetic valve 2 in the current working condition.
The device is arranged so as to accurately control whether the electromagnetic valve 2 needs to act, and can effectively avoid excessive injection of lubricating oil caused by short time interval between the start of the action of the electromagnetic valve 2 under the working condition and the end of the operation of the electromagnetic valve 2 under the previous working condition, thereby accurately controlling whether the electromagnetic valve 2 acts.
The third set time is an empirical value obtained by a large number of tests in the earlier stage.
The engine system of the invention adopts the control method for the engine system, thereby effectively improving the service performance of the engine system.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (7)
1. A control method for an engine system, characterized by comprising:
recording the duration after the engine is started;
judging whether the duration is smaller than a first set duration or not;
if the duration is smaller than the first set duration, controlling the electromagnetic valve (2) to be powered off and controlling the piston nozzle (3) to spray oil;
if the duration is longer than or equal to the first set duration, controlling the electromagnetic valve (2) according to engine operation parameters;
wherein the engine operating parameters include at least: exhaust temperature, engine oil pressure, water temperature and in-cylinder temperature of the piston cylinder;
judging whether the exhaust temperature is greater than a first temperature set value; judging whether the engine oil pressure is larger than a first pressure set value or not; judging whether the water temperature is greater than a second temperature set value; judging whether the temperature in the piston cylinder is greater than a third temperature set value;
if the exhaust temperature is greater than the first temperature set value, the engine oil pressure is greater than the first pressure set value, the water temperature is greater than the second temperature set value, and the temperature in the piston cylinder is greater than the third temperature set value, the electromagnetic valve (2) is controlled to be powered off, and the piston nozzle (3) is controlled to spray oil;
judging whether the engine oil pressure is smaller than a second pressure set value when the piston nozzle (3) sprays oil;
if the engine oil pressure is smaller than the second pressure set value, a fault of the electromagnetic valve (2) is reported;
wherein the second pressure set point is less than the first pressure set point;
the specific steps of controlling the solenoid valve (2) according to engine operating parameters further comprise:
if the duration is longer than the first set duration;
if the exhaust temperature is greater than or equal to the first temperature set value, determining a first adjustment coefficient according to the exhaust temperature, and adjusting the opening of the electromagnetic valve (2) according to the first adjustment coefficient;
if the engine oil pressure is greater than or equal to the first pressure set value, determining a second regulating coefficient according to the engine oil pressure, and regulating the opening of the electromagnetic valve (2) according to the second regulating coefficient;
if the water temperature is greater than or equal to the second temperature set value, determining a third adjusting coefficient according to the water temperature, and adjusting the opening of the electromagnetic valve (2) according to the third adjusting coefficient;
and if the temperature in the cylinder of the piston cylinder is larger than or equal to the third temperature set value, determining a fourth regulating coefficient according to the temperature in the cylinder of the piston cylinder, and regulating the opening of the electromagnetic valve (2) according to the fourth regulating coefficient.
2. The control method for an engine system according to claim 1, characterized in that the specific step of controlling the solenoid valve (2) as a function of engine operating parameters further comprises:
if the exhaust temperature is less than or equal to the first temperature set value, the engine oil pressure is less than or equal to the first pressure set value, the water temperature is less than or equal to the second temperature set value, and the temperature in the cylinder of the piston cylinder is less than or equal to the third temperature set value, judging whether the duration is longer than a second set duration;
and if the duration is longer than the second set duration, controlling the solenoid valve (2) to be powered off and controlling the piston nozzle (3) to spray oil.
3. The control method for an engine system according to any one of claims 1-2, characterized by further comprising, before controlling the solenoid valve (2) in accordance with an engine operating parameter:
and correcting the opening degree of the electromagnetic valve (2) according to the output voltage of the electromagnetic valve (2), the engine oil viscosity and the aging degree of the electromagnetic valve (2).
4. The control method for an engine system according to any one of claims 1-2, characterized in that said control method for an engine system further comprises:
when the electromagnetic valve (2) is electrified, judging whether a circuit where the electromagnetic valve (2) is located is a passage, and if the electromagnetic valve (2) is in short circuit or open circuit, reporting a circuit fault where the electromagnetic valve (2) is located.
5. The control method for an engine system according to any one of claims 1-2, characterized in that said control method for an engine system further comprises:
judging whether the load of the engine is larger than the set load or not in the previous working condition, and judging whether the rotating speed of the engine is larger than the set rotating speed or not;
and if the engine load is larger than the set load and the engine rotating speed is larger than the set rotating speed in the previous working condition, delaying a third set duration to control the electromagnetic valve (2) in the current working condition.
6. A control method for an engine system according to any one of claims 1-2, characterized in that the injection duration of the injection of fuel to the piston nozzle (3) is controlled in the range: 30 s-120 s.
7. An engine system, characterized by applying the control method for an engine system according to any one of claims 1 to 6.
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