CN111828159A - Intelligent cooling system of engine and control method - Google Patents
Intelligent cooling system of engine and control method Download PDFInfo
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- CN111828159A CN111828159A CN202010691282.XA CN202010691282A CN111828159A CN 111828159 A CN111828159 A CN 111828159A CN 202010691282 A CN202010691282 A CN 202010691282A CN 111828159 A CN111828159 A CN 111828159A
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- 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
- F01P3/20—Cooling circuits not specific to a single part of engine or machine
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- 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
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
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- 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
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
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- 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
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
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- 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
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
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- 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
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- 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
- F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/0493—Controlling the air charge temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses an intelligent cooling system of an engine and a control method, comprising a large circulation pipeline and a small circulation pipeline; the electronic water pump, the electronic thermostat, the radiator and the water jacket are sequentially arranged on the large circulation pipeline; one end of the small circulation pipeline is connected with the electronic thermostat, and the other end of the small circulation pipeline is connected with the large circulation pipeline between the radiator and the water jacket; the water jacket, the electronic water pump and the electronic thermostat are arranged in the engine; the radiator is arranged on the outer side of the engine; an intercooler and an electric control fan are respectively arranged on two sides of the radiator; the electric control fan, the electronic water pump and the electronic thermostat are simultaneously and electrically connected with a controller. The invention provides an intelligent cooling system of an engine, which can enable the engine to reach and be stabilized in an optimal operating temperature range as soon as possible after being started, reduce abrasion, reduce oil consumption and improve dynamic property.
Description
Technical Field
The invention belongs to the technical field of engines, and particularly relates to an intelligent cooling system of an engine and a control method.
Background
The optimal operation temperature of the cylinder body and the cylinder cover of the engine is about 85-95 ℃. If the temperature is lower than the range, the engine has poor lubrication, large part abrasion, large internal resistance and high oil consumption; if the temperature is higher than this range, the coolant is easily boiled (i.e., "boiling"), the rigidity of the engine piston, piston ring, connecting rod, and other parts is reduced, the engine piston is easily deformed, the normal clearance cannot be maintained between the parts, the oil film on the surfaces of the parts is broken, and the engine is easily damaged.
In addition, in order to increase the power per liter of engine (power generated by working volume per liter of cylinder), the engine intake system mostly adopts a supercharging technology. In the air intake process of the engine, the turbocharger applies work to the air compression, the pressure is increased, and the air intake temperature is increased, so that the oxygen content in unit volume is reduced. If the intake air temperature is too high, the engine may suffer from problems such as insufficient intake air and insufficient combustion. Therefore, the engine is not favorable for running due to the fact that the temperature of the cylinder cover of the engine cylinder body is too high or too low or the temperature of the air inlet of the engine is too high.
Therefore, the engine is provided with a cooling system which has the following functions: 1) the method comprises the following steps of (1) dissipating redundant heat generated in the operation of the engine into ambient air so as to prevent the cylinder cover of the engine cylinder from being overheated; 2) the cylinder cover of the engine cylinder body is kept at a high temperature, the engine is prevented from being overcooled, and the running reliability and the thermal efficiency of the engine are improved; 3) the supercharged air inlet of the engine is cooled, and the air inlet temperature is prevented from being too high, so that insufficient combustion is prevented.
However, the conventional engine cooling system has the following disadvantages: 1) the rigid fan is directly connected to the engine crankshaft or fan connection plate (the rotational speed is a fixed ratio to the engine crankshaft), and rotates at a certain rate as long as the engine is running. When the temperature of the cooling liquid is low, the engine does not need to dissipate heat, but the rigid fan rotates at a high speed, so that unnecessary power loss and noise are increased; 2) the mechanical water pump is driven by a crankshaft belt pulley of the engine, the mechanical water pump 5 can run as long as the engine is started, when the temperature of the cooling liquid is low, the engine does not need to dissipate heat or the heat dissipation capacity is small, the running of the mechanical water pump is not beneficial to the temperature rise of the engine, and meanwhile, the power consumption of the engine is increased; 3) the thermostat adopts a wax thermostat, and the temperature sensing piece is pushed to open and close the valve to control the flow of the cooling liquid through the expansion and contraction of the heat sensitive paraffin, so that the large and small circulation change of an engine cooling system is realized, but the wax thermostat temperature sensing paraffin is easily influenced by water scale and cannot sensitively sense the temperature, the timely opening or closing of the valve is influenced, the temperature fluctuation is large, and the normal operation of the engine is not facilitated; 4) the rigid fan, the mechanical water pump and the thermostat cannot be actively controlled, and the temperature of the cooling liquid is greatly fluctuated when the engine runs (which is also confirmed by actual measurement).
Meanwhile, in order to prevent the cooling liquid from boiling, the starting temperature of the thermostat is set to be lower, so that on one hand, the heat engine time of the engine reaching the optimal temperature range is increased, on the other hand, when the engine runs stably, the temperature of the cooling liquid is lower than the optimal running temperature range required by the engine, the oil consumption of the engine is increased, the abrasion of the engine is increased, and the service life of the engine is shortened.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an intelligent cooling system of an engine and a control method thereof, which aim to solve the problem that a fan, a water pump and a thermostat can not be actively controlled in the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
an intelligent cooling system of an engine comprises a large circulation pipeline, a small circulation pipeline and a controller; the electronic water pump, the electronic thermostat, the radiator and the water jacket are sequentially arranged on the large circulation pipeline; one end of the small circulation pipeline is connected with the electronic thermostat, and the other end of the small circulation pipeline is connected with the large circulation pipeline between the radiator and the water jacket; the water jacket, the electronic water pump and the electronic thermostat are arranged in the engine; the radiator is arranged on the outer side of the engine; intercoolers are arranged in parallel on the radiators; an electric control fan is further mounted on one side of the radiator; the electric control fan, the electronic water pump and the electronic thermostat are simultaneously electrically connected with the controller.
A control method of an intelligent cooling system of an engine comprises the following steps:
acquiring coolant temperature, ambient temperature, engine speed and engine torque;
the controller respectively acquires the lowest rotating speed of the electric control fan, the lowest power of the electronic water pump and the heat dissipation requirement of the engine according to the coolant temperature, the ambient temperature, the engine rotating speed and the engine torque;
calculating a first heat dissipation capacity when the rotating speed of the electric control fan is the lowest rotating speed, the power of the electronic water pump is the lowest power, and the opening of the electronic thermostat is 100%;
if the first heat dissipation amount is higher than the heat dissipation amount requirement, adjusting the opening of the electronic thermostat to enable the first heat dissipation amount to be equal to the heat dissipation amount requirement;
if the first heat dissipation capacity is lower than the heat dissipation capacity requirement, calculating a second heat dissipation capacity when the opening degree of the electronic thermostat is 100%, the rotating speed of the electronic control fan is the lowest rotating speed, and the power of the electronic water pump is the maximum power;
if the second heat dissipation amount is higher than the heat dissipation amount requirement, adjusting the power of the electronic water pump to enable the second heat dissipation amount to be equal to the heat dissipation requirement;
and if the second heat dissipation capacity is lower than the heat dissipation capacity requirement, adjusting the rotating speed of the electric control fan to enable the second heat dissipation capacity to be equal to the heat dissipation requirement.
Further, the method for acquiring the opening degree of the electronic thermostat comprises the following steps:
and (3) setting the rotating speed of the electric control fan as the lowest rotating speed and the power of the electronic water pump as the lowest power, and obtaining the opening degree of the electronic thermostat by searching a MAP (MAP).
Further, the method for acquiring the power of the electronic water pump comprises the following steps
And (3) setting the opening of the electronic thermostat to be 100% and the rotating speed of the electronic control fan to be the lowest rotating speed, and obtaining the power of the electronic water pump by searching a MAP (MAP).
Further, the method for acquiring the rotating speed of the electrically controlled fan comprises the following steps:
the power of the electronic water pump is made to be the maximum power, the opening degree of the electronic thermostat is made to be 100%, and the rotating speed of the electronic control fan is obtained by searching a MAP.
Further, the MAP is obtained by a coolant temperature, an ambient temperature, an engine speed, and an engine torque test.
Compared with the prior art, the invention has the following beneficial effects:
the invention introduces the electric control fan, the electronic water pump and the electronic thermostat, and can actively control the flow rate of the cooling liquid of the engine and the cooling wind speed; the system collects the ambient temperature, calculates the temperature difference between liquid and gas, accurately calculates the heat dissipation requirements of the radiator and the intercooler, and has the advantages of high temperature control precision, low oil consumption and stable temperature of the cooling liquid; considering the heat dissipation requirement of an intercooler, in the running process of an engine, the temperature of intercooling outlet air is always kept lower than the limit value of the engine; the controller of the invention can actively adjust the rotating speed of the electric control fan, the power of the electronic water pump and the opening of the electronic thermostat according to the input signal, on one hand, the heat engine is accelerated, on the other hand, the temperature of the cooling liquid is always in an ideal range, the energy consumption is reduced, the abrasion of the engine is reduced, and the service life of the engine is prolonged.
Drawings
FIG. 1 is a schematic diagram of an intelligent cooling system for an engine;
FIG. 2 is a diagram of input and output signals of the controller;
fig. 3 is a control flow chart of the controller.
Reference numerals: 1-an intercooler; 2-a radiator; 3-an electric control fan; 4-a controller; 5-water jacket; 6-an electronic water pump; 7-electronic thermostat; 8-engine.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
As shown in fig. 1, an intelligent cooling system for an engine comprises a large circulation pipeline and a small circulation pipeline; the electronic water pump 6, the electronic thermostat 7, the radiator 2 and the water jacket 5 are sequentially arranged on the large circulation pipeline; one end of the small circulation pipeline is connected to the electronic thermostat 7, and the other end of the small circulation pipeline is connected to the large circulation pipeline between the radiator 2 and the water jacket 5, wherein the water jacket 5, the electronic water pump 6 and the electronic thermostat 7 are integrated in an engine 8. The radiator 2 is mounted outside the engine 8; an intercooler 1 and an electric control fan 3 (which can also be a silicone oil clutch fan) are respectively arranged on two sides of the radiator 2.
The electric control fan 3, the electronic water pump 6 and the electronic thermostat 7 are simultaneously electrically connected with the controller 4.
The cooling liquid circulation system has the following two passages:
1) and (3) large circulation: the cooling liquid is driven by the electronic water pump 6, flows through the water jacket 5, the electronic thermostat 7 and the radiator 2, and flows back to the electronic water pump 6.
2) And (3) small circulation: the coolant is driven by the electronic water pump 6, flows through the water jacket 5 and the electronic thermostat 7, and flows back to the electronic water pump 6 from a water path in the engine body.
When the engine runs, the cooling liquid is driven by the electronic water pump 6, flows through the water jacket 5, is absorbed through heat exchange, transfers heat generated when the engine runs to the cooling liquid, and returns to the electronic water pump 6 after being circularly cooled in size.
As shown in fig. 2, the controller 4 outputs control signals according to the collected coolant temperature, ambient temperature, engine speed and torque and a built-in algorithm by the electronic thermostat, the electronic control fan and the electronic water pump to control the opening of the electronic thermostat, the speed of the electronic control fan and the power of the electronic water pump, so as to control the heat dissipation capacity of the coolant, the heat dissipation capacity of the intercooler and the demand of the engine to be matched, so that the intercooler inlet air temperature is lower than the maximum limit value and the coolant temperature is within an ideal range.
The temperature control method comprises the following steps:
MAP graph test calibration
TABLE 1 MAP Chart
The MAP graph is obtained through experimental tests, and if the MAP graph has n parameters, the nth parameter can be obtained according to any n-1 parameters
In order to avoid that the heat dissipation capacity of the intercooler 2 is too low due to too low rotating speed of the electric control fan 3, the combustion condition of the engine is deteriorated because the air inlet temperature of the engine is higher than the upper limit of the air inlet temperature, the lowest rotating speed Vfmin of the electric control fan 3 under the conditions of any environmental temperature, engine rotating speed and torque is tested to form a MAP graph I.
In order to avoid the phenomenon that the flow speed of the cooling liquid in the engine is too low and local boiling and even cylinder pulling are caused due to too low power of the electronic water pump 6, the lowest power Ppmin of the electronic water pump 6 under the conditions of any cooling liquid temperature, engine rotating speed and torque is tested to form a MAP graph II.
In order to enable the temperature of the engine coolant to be within an ideal range, the engine heat dissipation requirement Qr under any coolant temperature, ambient temperature, engine speed and torque is subjected to test calibration, and a MAP graph III is prepared.
In order to obtain the relationship between the engine heat dissipation amount and the coolant temperature, the ambient temperature, the engine speed and the torque, the engine heat dissipation amount Q at any coolant temperature, ambient temperature, engine speed and torque is subjected to a test to form a MAP graph four.
As shown in fig. 3, a control method of an intelligent cooling system of an engine includes the following steps:
1) the coolant temperature, the ambient temperature, the engine speed and the engine torque are collected.
2) In order to avoid that the rotating speed Vf of the electric control fan 3 is too low, the heat dissipation Q of the intercooler 2 is too low, the air inlet temperature of the engine is higher than the air inlet temperature upper limit, the combustion condition of the engine is deteriorated, the controller 4 searches a MAP I according to the collected ambient temperature, the engine rotating speed and the torque, and the lowest rotating speed Vfmin of the electric control fan 3 is calculated.
3) In order to avoid the phenomenon that the flow speed of the cooling liquid in the engine is too low and local boiling or even cylinder scuffing is caused due to the fact that the power Pp of the electronic water pump 6 is too small, the controller 4 checks a MAP graph II according to the collected temperature of the cooling liquid, the rotating speed and the torque of the engine, and calculates the lowest power Ppmin of the electronic water pump 6.
4) In order to make the temperature of the engine coolant within the desired range, the controller 4 looks up the MAP three to obtain the heat dissipation demand Qr of the engine based on the collected coolant temperature, ambient temperature, engine speed, and torque.
Next, the rotation speed Vf of the electric control fan 3, the power Pp of the electronic water pump 6 and the opening θ of the electronic thermostat 7 are controlled to make the heat dissipation Q of the radiator 2 equal to the heat dissipation requirement Qr for maintaining the temperature of the engine coolant within the ideal range.
Although the control of the rotating speed Vf of the electric control fan 3, the power Pp of the electronic water pump and the opening theta of the electronic thermostat 7 can realize the control of the heat dissipating capacity Q under certain conditions, and the heat dissipating capacity requirement is met, the energy consumption required by adjusting the opening theta of the electronic thermostat 7 is minimum, the energy consumption required by adjusting the power Pp of the electronic water pump is second, and the energy consumption required by adjusting the rotating speed Vf of the electric control fan 3 is maximum, so that according to the principle of minimum energy consumption, the priority of adjusting three elements is sequentially from high to low: the opening theta of the electronic thermostat 7, the power Pp of the electronic water pump 6 and the rotating speed Vf of the electric control fan 3.
1) Calculating a first heat dissipation Q when the rotating speed of the electric control fan 3 is the lowest speed Vfmin, the power of the electronic water pump 6 is the lowest power Ppmin and the opening theta of the electronic thermostat 7 is =100%1。
If the first heat dissipation amount Q1The heat dissipation requirement Qr is higher than the first heat dissipation quantity Q by adjusting the opening theta of the electronic thermostat 71Equal to the heat dissipation requirement Qr.
Therefore, the rotating speed of the electric control fan 3 is set to be the lowest speed Vfmin, the power of the electronic water pump 6 is set to be the lowest power Ppmin, and the opening theta of the electronic thermostat 7 is determined by checking the MAP graph.
2) If the first heat dissipation amount Q1Below the heat dissipation requirement Qr, only by adjusting the electronic thermostat 7Opening theta of the first heat dissipation amount Q1And the heat dissipation requirement Qr is met.
Therefore, the second heat dissipation capacity Q is calculated when the opening θ of the electronic thermostat 7 is =100%, the rotating speed of the electronic control fan 3 is the lowest speed Vfmin, and the power of the electronic water pump 6 is the maximum power Ppmax2。
If the second heat dissipation amount Q2The second heat dissipation quantity Q can be achieved by adjusting the power Pp of the electronic water pump 6 when the heat dissipation requirement Qr is higher than2Equal to the heat dissipation requirement Qr.
Therefore, the opening theta of the electronic thermostat 7 is enabled to be =100%, the rotating speed of the electronic control fan 3 is the lowest speed Vfmin, and the power Pp of the electronic water pump 6 is determined by checking a MAP (MAP).
3) If the second heat dissipation amount Q2If the heat dissipation requirement Qr is lower than the heat dissipation requirement Qr, the heat dissipation quantity Q cannot meet the heat dissipation requirement Qr only by adjusting the power of the electronic water pump 6, and the second heat dissipation quantity Q is adjusted by adjusting the rotating speed of the electronic control fan2Equal to the heat dissipation requirement Qr.
Therefore, the power of the electronic water pump 6 is made to be the maximum power Ppmax, the opening theta of the electronic thermostat 7 is =100%, and the rotating speed Vf of the electronic control fan 3 is determined by checking a MAP (MAP).
The rotation speed of the electric control fan can be actively controlled. When the temperature of the cooling liquid is lower, the electronic control fan is actively controlled to reduce the rotating speed, the energy consumption of the engine is reduced, and the noise of the fan is reduced; the power of the electronic water pump can be actively controlled, when the temperature of the cooling liquid is low, the controller actively controls the electronic water pump to operate at low power according to the input signal, the speed of a heat engine is increased, and the energy loss is reduced; the electronic thermostat has the advantages of actively controlling the opening, short response time, quickly and accurately controlling the ratio of the circulating flow to the circulating flow, small temperature fluctuation of the cooling liquid, reducing energy consumption, reducing the abrasion of the engine and prolonging the service life of the engine.
The invention can make the engine reach and accurately stabilize in the optimal operation temperature range as soon as possible after starting, reduce noise, reduce abrasion, reduce oil consumption and improve dynamic property.
The invention comprehensively considers the heat dissipation requirements of the intercooler and the radiator, and always keeps the temperature of the intercooling outlet air lower than the engine limit value in the running process of the engine, thereby ensuring the combustion condition of the engine to be suitable and reducing the oil consumption of the engine.
The invention provides an intelligent cooling system of an engine, which can enable the engine to reach and be stabilized in an optimal operating temperature range as soon as possible after being started, reduce abrasion, reduce oil consumption and improve dynamic property.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solutions of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications all belong to the protection scope of the embodiments of the present invention.
Claims (6)
1. An intelligent cooling system of an engine is characterized by comprising a large circulation pipeline, a small circulation pipeline and a controller; the electronic water pump, the electronic thermostat, the radiator and the water jacket are sequentially arranged on the large circulation pipeline; one end of the small circulation pipeline is connected with the electronic thermostat, and the other end of the small circulation pipeline is connected with the large circulation pipeline between the radiator and the water jacket; the water jacket, the electronic water pump and the electronic thermostat are arranged in the engine; the radiator is arranged on the outer side of the engine; intercoolers are arranged in parallel on the radiators; an electric control fan is further mounted on one side of the radiator; the electric control fan, the electronic water pump and the electronic thermostat are simultaneously electrically connected with the controller.
2. A control method of an intelligent cooling system of an engine is characterized by comprising the following steps:
acquiring coolant temperature, ambient temperature, engine speed and engine torque;
the controller respectively acquires the lowest rotating speed of the electric control fan, the lowest power of the electronic water pump and the heat dissipation requirement of the engine according to the coolant temperature, the ambient temperature, the engine rotating speed and the engine torque;
calculating a first heat dissipation capacity when the rotating speed of the electric control fan is the lowest rotating speed, the power of the electronic water pump is the lowest power, and the opening of the electronic thermostat is 100%;
if the first heat dissipation amount is higher than the heat dissipation amount requirement, adjusting the opening of the electronic thermostat to enable the first heat dissipation amount to be equal to the heat dissipation amount requirement;
if the first heat dissipation capacity is lower than the heat dissipation capacity requirement, calculating a second heat dissipation capacity when the opening degree of the electronic thermostat is 100%, the rotating speed of the electronic control fan is the lowest rotating speed, and the power of the electronic water pump is the maximum power;
if the second heat dissipation amount is higher than the heat dissipation amount requirement, adjusting the power of the electronic water pump to enable the second heat dissipation amount to be equal to the heat dissipation requirement;
and if the second heat dissipation capacity is lower than the heat dissipation capacity requirement, adjusting the rotating speed of the electric control fan to enable the second heat dissipation capacity to be equal to the heat dissipation requirement.
3. The control method of the intelligent cooling system of the engine is characterized in that the method for acquiring the opening degree of the electronic thermostat comprises the following steps:
and (3) setting the rotating speed of the electric control fan as the lowest rotating speed and the power of the electronic water pump as the lowest power, and obtaining the opening degree of the electronic thermostat by searching a MAP (MAP).
4. The control method of the intelligent cooling system of the engine as claimed in claim 2, wherein the method for obtaining the power of the electronic water pump comprises
And (3) setting the opening of the electronic thermostat to be 100% and the rotating speed of the electronic control fan to be the lowest rotating speed, and obtaining the power of the electronic water pump by searching a MAP (MAP).
5. The control method of the intelligent cooling system of the engine as claimed in claim 2, wherein the method for obtaining the rotation speed of the electrically controlled fan comprises the following steps:
the power of the electronic water pump is made to be the maximum power, the opening degree of the electronic thermostat is made to be 100%, and the rotating speed of the electronic control fan is obtained by searching a MAP.
6. The control method of an intelligent cooling system of an engine as claimed in claim 2, wherein the MAP is obtained by a test of a coolant temperature, an ambient temperature, an engine speed and an engine torque.
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| CN202010691282.XA CN111828159B (en) | 2020-07-17 | 2020-07-17 | Intelligent cooling system of engine and control method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377292A (en) * | 2020-12-01 | 2021-02-19 | 广西玉柴机器股份有限公司 | Control method and system capable of accurately managing heat of engine |
| CN113738491A (en) * | 2021-09-28 | 2021-12-03 | 一汽解放汽车有限公司 | Engine cooling system and control method thereof |
| CN115163282A (en) * | 2022-07-14 | 2022-10-11 | 东风汽车集团股份有限公司 | Control method and control system for cooling engine |
| WO2022228309A1 (en) * | 2021-04-27 | 2022-11-03 | 比亚迪股份有限公司 | Thermal management control method and device, storage medium, and vehicle |
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| CN113738491B (en) * | 2021-09-28 | 2022-12-13 | 一汽解放汽车有限公司 | Engine cooling system and control method thereof |
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