CN110332039B - Engine cooling system and control method - Google Patents

Engine cooling system and control method Download PDF

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Publication number
CN110332039B
CN110332039B CN201910618508.0A CN201910618508A CN110332039B CN 110332039 B CN110332039 B CN 110332039B CN 201910618508 A CN201910618508 A CN 201910618508A CN 110332039 B CN110332039 B CN 110332039B
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China
Prior art keywords
cooling liquid
engine
thermostat
water jacket
water pump
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CN201910618508.0A
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CN110332039A (en
Inventor
王次安
杨林强
王宏大
昂金凤
王军
刘吉林
雷蕾
张超
倪成鑫
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Anhui Jianghuai Automobile Group Corp
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Anhui Jianghuai Automobile Group Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
    • B60H1/04—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/002—Cooling
    • 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
    • F01P3/18—Arrangements or mounting of liquid-to-air heat-exchangers
    • 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
    • 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
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/36—Cylinder heads having cooling means for liquid cooling
    • F02F1/40—Cylinder heads having cooling means for liquid cooling cylinder heads with means for directing, guiding, or distributing liquid stream 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0412—Cooling or heating; Control of temperature
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Transportation (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • General Details Of Gearings (AREA)

Abstract

The invention provides an engine cooling system and a control method, when the temperature of the coolant of the engine cooling system is smaller than a first preset temperature threshold value, the engine cooling system enters a small circulation state, a water pump is controlled to pressurize the coolant in the engine cooling system to obtain small circulation coolant flowing to an engine water jacket device, and meanwhile, a valve of a wax type thermostat is closed to ensure that no coolant flows through an engine oil cooler and a transmission oil cooler; the engine water jacket device divides the small circulating cooling liquid to obtain a first small circulating cooling liquid flowing to the small circulating branch and a second small circulating cooling liquid flowing to the fan heater, controls the first small circulating cooling liquid to flow into the main thermostat through the small circulating branch, and controls the second small circulating cooling liquid to flow back to the main thermostat after being subjected to heat treatment by the fan heater. The invention improves the arrangement of the cooling system of the three-cylinder supercharged engine, thereby reducing the heat loss and realizing the effect of quick temperature rise of the engine.

Description

Engine cooling system and control method
Technical Field
The invention relates to the technical field of automobile engines, in particular to an engine cooling system and a control method.
Background
The cooling system of the engine is one of important systems for guaranteeing the normal and stable operation of the engine, the main function of the cooling system is to ensure that the engine has the optimum working temperature under various working conditions, and the cooling system has great influence on the dynamic property, the economical efficiency and the reliability of the engine. The temperature of the cooling system is mainly controlled by a thermostat, and the circulation route and the flow of cooling water are automatically changed according to the temperature of the water of the engine, so that the engine always works at the most suitable temperature.
The existing small-displacement three-cylinder supercharged engine has the problems that the temperature rise of engine water under low-temperature working conditions is slow due to low heat load and small heat productivity in the working process, the heating effect is poor, the engine can enter the optimal working state for a long time due to slow temperature rise, and customers complain about the problem due to poor heating effect.
Disclosure of Invention
The invention mainly aims to provide an engine cooling system and a control method, and aims to solve the problem of low cooling efficiency of an engine
The existing three-cylinder supercharged engine has the technical problems of slow water temperature rise of the engine and poor heating effect under the low-temperature working condition caused by low heat load and small heat productivity in the working process.
The engine cooling system comprises an engine water jacket device, a water pump, a main thermostat, a gearbox oil cooler, a warm air blower, an engine oil cooler and a wax thermostat;
the main thermostat is used for acquiring the temperature of cooling liquid in an engine, detecting the opening and closing state of a wax thermostat valve when the temperature of the cooling liquid is smaller than a first preset temperature threshold value, and closing the wax thermostat valve when the wax thermostat valve is in the opening state so as to ensure that no cooling liquid flows through the engine oil cooler and the transmission oil cooler;
the main thermostat is also used for sending a small circulation instruction to the water pump so as to control the water pump to pressurize the cooling liquid in the engine cooling system and obtain small circulation cooling liquid flowing to the engine water jacket device;
the engine water jacket device is used for shunting the small circulation cooling liquid to obtain a first small circulation cooling liquid flowing to the small circulation branch and a second small circulation cooling liquid flowing to the fan heater, controlling the first small circulation cooling liquid to flow into the main thermostat through the small circulation branch, and controlling the second small circulation cooling liquid to flow back to a water inlet of the water pump after being subjected to heat treatment by the fan heater.
Preferably, a water outlet of the water pump is provided with a first water pump branch and a second water pump branch, the first water pump branch is communicated with the second end of the wax type thermostat, and the second water pump branch is communicated with a liquid inlet of the engine water jacket device; the first end of the wax type thermostat is respectively connected with the second end of the engine oil cooler and the second end of the gearbox oil cooler; a first liquid outlet of the engine water jacket device is provided with a small circulation branch, the small circulation branch is connected with a first end of the main thermostat, and a second end of the main thermostat is connected with a water inlet of the water pump; and a second liquid outlet of the engine water jacket device is connected with a first end of the warm air blower, and a second end of the warm air blower is connected with a water inlet of the water pump.
Correspondingly, the main thermostat is also used for sending a large circulation instruction to the water pump and opening a valve of the wax thermostat when the temperature of the cooling liquid is greater than a second preset temperature threshold value;
the water pump is also used for responding to a large circulation instruction sent by the main thermostat and pressurizing the cooling liquid to obtain a first path of cooling liquid flowing to the wax thermostat and a second path of cooling liquid flowing to the engine water jacket device;
the wax type thermostat is used for shunting the first path of cooling liquid through the valve to obtain a first target cooling liquid flowing to the engine oil cooler and a second target cooling liquid flowing to the transmission oil cooler;
preferably, the engine cooling system further comprises a radiator; a first liquid outlet of the engine water jacket device is connected with a first end of the radiator, the first end of the radiator is respectively connected with a first end of the engine oil cooler and a first end of the transmission oil cooler, and a second end of the radiator is connected with a third end of the main thermostat;
the engine water jacket device is also used for shunting the second path of cooling liquid to obtain a third target cooling liquid flowing to the radiator and a fourth target cooling liquid flowing to the fan heater;
the radiator is used for performing heat dissipation treatment on the first target cooling liquid, the second target cooling liquid and the third target cooling liquid which flow in, so that the first target cooling liquid, the second target cooling liquid and the third target cooling liquid which are subjected to heat dissipation treatment flow into the main thermostat as fifth target cooling liquid;
the warm air blower is used for performing heat treatment on the fourth target cooling liquid to enable the fourth target cooling liquid to flow back to a water inlet of the water pump.
Preferably, a main valve is arranged at the third end of the main thermostat, and an auxiliary valve is arranged at the first end of the main thermostat;
the main thermostat is further used for closing the main valve and opening the auxiliary valve so as to control the first small circulating coolant to flow into a water inlet of the water pump through the main thermostat.
Preferably, the main thermostat is further configured to open the main valve and close the auxiliary valve to control the fifth target coolant to flow from the second end of the main thermostat to the water inlet of the water pump.
Preferably, the engine water jacket device comprises a water jacket cylinder body and a water jacket cylinder cover, a first liquid outlet of the engine water jacket device is arranged at the first end of the water jacket cylinder body, a liquid inlet of the engine water jacket device is arranged in the water jacket cylinder body, and a second liquid outlet of the engine water jacket device is arranged in the water jacket cylinder cover.
Preferably, the water jacket cylinder body is provided with a cylinder gasket water hole;
the engine water jacket device is also used for shunting the small circulating cooling liquid through the cylinder gasket water hole, so that part of the cooling liquid of the small circulating cooling liquid is used as second small circulating cooling liquid and flows into the water jacket cylinder cover through the cylinder gasket water hole, and the small circulating cooling liquid flows to the fan heater through the second liquid outlet;
the engine water jacket device is also used for shunting the second path of cooling liquid through the cylinder gasket water hole, so that part of the second path of cooling liquid as a fourth target cooling liquid flows into the water jacket cylinder cover through the cylinder gasket water hole, and the fourth target cooling liquid flows to the fan heater through the second liquid outlet.
Further, to achieve the above object, the present invention also proposes a control method applied to the engine cooling system as described above, the control method including:
the method comprises the steps that a main thermostat obtains the temperature of cooling liquid in an engine, and when the temperature of the cooling liquid is smaller than a first preset temperature threshold value, the opening and closing state of a wax type thermostat valve is detected;
when the wax type thermostat valve is in an opening state, the main thermostat closes the wax type thermostat valve to ensure that no cooling liquid flows through the engine oil cooler and the transmission oil cooler;
the main thermostat sends a small circulation instruction to the water pump so that the water pump pressurizes the coolant in the engine cooling system to obtain small circulation coolant flowing to the engine water jacket device;
the engine water jacket device divides the small circulating cooling liquid to obtain a first small circulating cooling liquid flowing to the small circulating branch and a second small circulating cooling liquid flowing to the fan heater;
the engine water jacket device controls the first small circulating cooling liquid to flow into the main thermostat through the small circulating branch, and the second small circulating cooling liquid is thermally treated by the fan heater and then flows back to the water inlet of the water pump.
Correspondingly, the control method further comprises the following steps:
when the temperature of the cooling liquid is greater than a second preset temperature threshold value, the main thermostat sends a large circulation instruction to the water pump, and a valve of the wax thermostat is opened;
the water pump responds to a large circulation instruction sent by the main thermostat and pressurizes cooling liquid in an engine cooling system to obtain a first path of cooling liquid flowing to the wax thermostat and a second path of cooling liquid flowing to the engine water jacket device;
the wax type thermostat divides the first path of cooling liquid through the valve to obtain a first target cooling liquid flowing to the engine oil cooler and a second target cooling liquid flowing to the transmission oil cooler;
the engine water jacket device divides the second path of cooling liquid to obtain a third target cooling liquid flowing to the radiator and a fourth target cooling liquid flowing to the fan heater;
the radiator performs heat dissipation treatment on the first target cooling liquid, the second target cooling liquid and the third target cooling liquid which flow in, so that the first target cooling liquid, the second target cooling liquid and the third target cooling liquid which are subjected to heat dissipation treatment flow into the main thermostat as fifth target cooling liquid;
and after the fan heater carries out heat treatment on the fourth target cooling liquid, enabling the fourth target cooling liquid to flow back to a water inlet of the water pump.
The engine cooling system comprises an engine water jacket device, a water pump, a main thermostat, a gearbox oil cooler, a warm air blower, an engine oil cooler and a wax thermostat; when the temperature of the cooling liquid is lower than a first preset temperature threshold value, the engine cooling system enters a small circulation state, a water pump is controlled to pressurize the cooling liquid in the engine cooling system to obtain small circulation cooling liquid flowing to an engine water jacket device, and meanwhile, a valve of a wax type thermostat is closed to ensure that no cooling liquid flows through an engine oil cooler and a transmission oil cooler; the engine water jacket device divides the small circulating cooling liquid to obtain a first small circulating cooling liquid flowing to the small circulating branch and a second small circulating cooling liquid flowing to the fan heater, controls the first small circulating cooling liquid to flow into the main thermostat through the small circulating branch, and controls the second small circulating cooling liquid to flow back to the main thermostat after being subjected to heat treatment by the fan heater. The invention improves the arrangement of the cooling system of the three-cylinder supercharged engine, thereby reducing the heat loss and realizing the effect of quick temperature rise of the engine.
Drawings
FIG. 1 is a schematic diagram of an engine cooling system according to an embodiment of the present invention entering a small cycle condition;
FIG. 2 is a schematic diagram of an engine cooling system according to an embodiment of the present invention entering a large cycle condition;
FIG. 3 is a schematic illustration of another configuration of an engine cooling system in an embodiment of the present invention;
FIG. 4 is a flowchart illustrating a control method applied to an engine cooling system according to a first embodiment of the present invention;
fig. 5 is a flowchart illustrating a control method applied to an engine cooling system according to a second embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
An embodiment of the invention provides an engine cooling system, and referring to fig. 1, fig. 1 is a schematic structural diagram of the engine cooling system when the engine cooling system enters a small circulation working condition.
The engine cooling system comprises an engine water jacket device 1, a water pump 3, a main thermostat 6, a gearbox oil cooler 7, a warm air blower 8, an engine oil cooler 9 and a wax thermostat 12; a water outlet of the water pump 3 is provided with a first water pump branch and a second water pump branch, the first water pump branch is communicated with the second end of the wax type thermostat 12, and the second water pump branch is communicated with a liquid inlet of the engine water jacket device 1; the first end of the wax type thermostat 12 is respectively connected with the second end of the engine oil cooler 9 and the second end of the gearbox oil cooler 7; a first liquid outlet of the engine water jacket device 1 is provided with a small circulation branch 11, the small circulation branch 11 is connected with a first end C of the main thermostat 6, and a second end B of the main thermostat 6 is connected with a water inlet of the water pump 3; a second liquid outlet of the engine water jacket device is connected with a first end of the warm air blower 8, and a second end of the warm air blower 8 is connected with a water inlet of the water pump 3;
the main thermostat 6 is configured to obtain a temperature of coolant in the engine, detect an open-close state of a wax thermostat valve when the temperature of the coolant is less than a first preset temperature threshold, and close the wax thermostat valve when the wax thermostat valve is in an open state, so as to ensure that no coolant flows through the engine oil cooler and the transmission oil cooler;
the main thermostat 6 is further configured to send a small circulation instruction to the water pump to control the water pump to pressurize coolant in the engine cooling system, so as to obtain small circulation coolant flowing to the engine water jacket device;
it can be understood that, in the embodiment, the main thermostat 6 is a valve for controlling the flow path of the cooling fluid, and is a thermostat, and the main thermostat 6 includes a temperature sensing component for obtaining the temperature of the cooling fluid in the engine, and when the temperature of the cooling fluid is less than a first preset temperature threshold, the engine cooling system enters a small circulation condition, and the first preset temperature threshold in the embodiment is preferably 70 degrees.
The engine water jacket device 1 is used for shunting the small circulation cooling liquid to obtain a first small circulation cooling liquid flowing to the small circulation branch and a second small circulation cooling liquid flowing to the fan heater, controlling the first small circulation cooling liquid to flow into the main thermostat through the small circulation branch, and controlling the second small circulation cooling liquid to flow back to a water inlet of the water pump after being subjected to heat treatment by the fan heater.
It will be appreciated that when the minor cycle is on, the wax thermostat 12 is not on, no coolant passes through the oil cooler 9 and the transmission oil cooler 7, and the coolant passes through the engine water jacket arrangement 1, then through the dedicated minor cycle passage 11, through the first end C of the main thermostat 6, through the secondary valve of the main thermostat 6, and joins the second minor cycle coolant through the fan heater 8 and flows into the water pump 3.
The engine cooling system of this embodiment is under the little circulation operating mode of low temperature, and wax formula thermostat 12 closes, and oil cooler 9 and gearbox oil cooler 7 do not have the coolant liquid to flow through, reduce the coolant liquid and give machine oil and the heating of gearbox oil, and then reduce thermal loss, promote the temperature rise rate. Because the coolant no longer flows to oil cooler 9 and gearbox oil cooler 7, can increase the coolant that flows to engine cylinder body water jacket 2, and then also can increase the coolant that flows to electric fan heater 8, be favorable to improving the warm braw effect.
Further, referring to fig. 2, fig. 2 is a schematic structural diagram of the engine cooling system according to an embodiment of the present invention when the engine cooling system enters a large circulation condition.
In the present embodiment, the engine cooling system further includes a radiator 4; a first liquid outlet of the engine water jacket device is connected with a first end of the radiator 4, a first end of the radiator 4 is respectively connected with a first end of the engine oil cooler 9 and a first end of the gearbox oil cooler 7, and a second end of the radiator 4 is connected with a third end A of the main thermostat 6;
the main thermostat 6 is further configured to send a large circulation instruction to the water pump 3 and open a valve of the wax thermostat 12 when the temperature of the coolant is greater than a second preset temperature threshold;
the water pump 3 is further configured to respond to a large circulation instruction sent by the main thermostat and pressurize the coolant to obtain a first path of coolant flowing to the wax thermostat and a second path of coolant flowing to the engine water jacket device;
it should be noted that, in the present embodiment, the second preset temperature threshold is preferably 86 degrees, and when the temperature of the coolant is greater than 86 degrees, the engine cooling system enters a large circulation condition;
the wax thermostat 12 is configured to split the first path of cooling liquid through the valve to obtain a first target cooling liquid flowing to the engine oil cooler and a second target cooling liquid flowing to the transmission oil cooler.
The engine water jacket device 1 is further configured to split the second path of coolant to obtain a third target coolant flowing to the radiator and a fourth target coolant flowing to the fan heater;
the radiator 4 is configured to perform heat dissipation processing on the first target coolant, the second target coolant, and the third target coolant that flow in, so that the first target coolant, the second target coolant, and the third target coolant that have undergone heat dissipation processing flow into the main thermostat as a fifth target coolant;
and the warm air blower 8 is used for performing heat treatment on the fourth target cooling liquid to enable the fourth target cooling liquid to flow back to a water inlet of the water pump.
Further, in this embodiment, the engine water jacket device 1 includes a water jacket cylinder body and a water jacket cylinder head, the first liquid outlet of the engine water jacket device 1 is disposed at the first end of the water jacket cylinder body, the liquid inlet of the engine water jacket device is disposed in the water jacket cylinder body, and the second liquid outlet of the engine water jacket device 1 is disposed in the water jacket cylinder head.
The engine water jacket device 1 is further configured to split the small circulation coolant through the cylinder gasket water hole, so that part of the small circulation coolant as a second small circulation coolant flows into the water jacket cylinder cover from the water jacket cylinder body through the cylinder gasket water hole, and the small circulation coolant flows to the fan heater 8 through the second liquid outlet;
the engine water jacket device 1 is further configured to split the second path of coolant through the cylinder gasket water hole, so that part of the second path of coolant as a fourth target coolant flows into the water jacket cylinder cover from the water jacket cylinder body through the cylinder gasket water hole, and the fourth target coolant flows to the fan heater through the second liquid outlet.
It can be understood that, in this embodiment, when the large circulation is started, the coolant is pressurized by the mechanical water pump 3 and then divided into two paths, one path flows to the wax thermostat 12, the other path flows to the engine cylinder water jacket 2 and flows to the cylinder head water jacket through the cylinder gasket water hole, part of the coolant flows out from the cylinder head to the fan heater 8, and the other main coolant flows back to the cylinder body from the cylinder head and flows out from the cylinder body, merges with the coolant flowing through the engine oil cooler 9 and flows to the radiator 4, and then flows through the main valve of the thermostat 6 through the third end inlet a of the main thermostat. In addition, the cooling liquid flowing through the wax thermostat 12 is divided into two paths, one path flows to the engine oil cooler 9, the other path flows to the transmission oil cooler 7, and the two paths of cooling liquid flow through the radiator 4 together before flowing to the radiator 4. The cooling liquid flowing through the warm air blower 8 directly flows to the front of the water pump 3 through the port F.
In this embodiment, before the warm braw directly flows to the water pump through F mouth, directly before leading 8 coolants of electric fan heater to the water pump, can improve the pressure before the pump of water pump 3, reduce the risk that the water pump takes place the cavitation, and then eliminate the negative effects that moisturizing brought before the temperature saver.
The embodiment can realize the purpose of increasing the flow passing through the radiator under the working condition of large circulation, and reduce the risk of poor heat balance of the engine.
Further, referring to fig. 3, fig. 3 is a schematic view of another structure of the engine cooling system according to an embodiment of the present invention.
In this embodiment, a main valve 61 is disposed at the third end a of the main thermostat 6, and an auxiliary valve 62 is disposed at the first end C of the main thermostat;
the main thermostat 6 is further configured to close the main valve 61 and open the auxiliary valve 62 to control the first small circulation coolant to flow into the water inlet of the water pump 3 through the main thermostat.
The embodiment can realize water supplement of the main thermostat 6, and the original expansion kettle 10 in the engine cooling system is supplemented with water before the main thermostat, and the water is supplemented through the water supplementing port G. Because the main valve 61 of the thermostat 6 is in a closed state under the small-cycle working condition, the water replenishing flow is zero, and further the internal flow of the degassing circulation pipeline of the radiator 4 is zero, and the internal flow of the degassing circulation pipeline of the water jacket cylinder cover is zero, the heat loss of the radiator 4 and the original expansion kettle 10 in the engine cooling system is favorably reduced. Meanwhile, throttle valves on the two original degassing pipelines (the degassing circulation pipeline of the radiator 4 and the degassing circulation pipeline of the water jacket cylinder cover) can be removed, and the cost is reduced.
Accordingly, the primary thermostat 6 is further configured to open the primary valve 61 and close the secondary valve 62 to control the fifth target coolant to flow from the second end of the primary thermostat into the water inlet of the water pump 3.
The embodiment can also realize that under the large circulation working condition of the engine cooling system, the main valve 61 of the main thermostat 6 is opened, the cooling liquid flowing through the radiator 4 comprises the cooling liquid of the gearbox oil cooler 7, the effective flow of the cooling liquid flowing through the radiator 4 is increased, and the cooling effect under the thermal balance working condition is further improved.
A first embodiment of a control method applied to the engine cooling system of the present invention is proposed based on the hardware structure of the engine cooling system.
In this embodiment, with reference to fig. 4 in combination with fig. 3, the control method includes the following steps:
step S10: the method comprises the steps that a main thermostat obtains the temperature of cooling liquid in an engine, and when the temperature of the cooling liquid is smaller than a first preset temperature threshold value, the opening and closing state of a wax type thermostat valve is detected;
step S20: when the wax type thermostat valve is in an opening state, the main thermostat closes the wax type thermostat valve to ensure that no cooling liquid flows through the engine oil cooler and the transmission oil cooler;
step S30: the main thermostat sends a small circulation instruction to the water pump so that the water pump pressurizes the coolant in the engine cooling system to obtain small circulation coolant flowing to the engine water jacket device;
step S40: the engine water jacket device divides the small circulating cooling liquid to obtain a first small circulating cooling liquid flowing to the small circulating branch and a second small circulating cooling liquid flowing to the fan heater;
step S50: the engine water jacket device controls the first small circulating cooling liquid to flow into the main thermostat through the small circulating branch, and the second small circulating cooling liquid is thermally treated by the fan heater and then flows back to the water inlet of the water pump.
It can be understood that in the embodiment, the wax type thermostat is added to realize the on-off of the engine oil cooler and the gearbox oil cooler branch according to the temperature, so that the temperature rise rate of the engine under the small circulation working condition is improved. When the small circulation is started, the wax type thermostat 12 is not started, no cooling liquid passes through the oil cooler 9 and the gearbox oil cooler 7, the cooling liquid passes through the cylinder water jacket 2, then passes through the special small circulation channel 11, passes through the auxiliary valve 62 of the main thermostat 6 through the inlet C on the thermostat valve seat, and is converged with the cooling liquid of the fan heater 8 to flow into the water pump 3. And then can realize under the little circulation operating mode of low temperature, wax formula thermostat 12 closes, and oil cooler 9 and gearbox oil cooler 7 do not have the coolant liquid to flow through, reduce the coolant liquid and give machine oil and the heating of gearbox oil, and then reduce thermal loss, promote temperature rise speed. In addition, the cooling liquid does not flow to the engine oil cooler 9 and the gearbox oil cooler 7 any more, the cooling liquid flowing to the engine cylinder water jacket 2 can be increased, the cooling liquid flowing to the fan heater 8 can be increased, and the warm air effect can be improved.
Further, in this embodiment, referring to fig. 5, the control method includes the following steps:
step S10': when the temperature of the cooling liquid is greater than a second preset temperature threshold value, the main thermostat sends a large circulation instruction to the water pump, and a valve of the wax thermostat is opened;
step S20': the water pump responds to a large circulation instruction sent by the main thermostat and pressurizes cooling liquid in an engine cooling system to obtain a first path of cooling liquid flowing to the wax thermostat and a second path of cooling liquid flowing to the engine water jacket device;
step S30': the wax type thermostat divides the first path of cooling liquid through the valve to obtain a first target cooling liquid flowing to the engine oil cooler and a second target cooling liquid flowing to the transmission oil cooler;
step S40': the engine water jacket device divides the second path of cooling liquid to obtain a third target cooling liquid flowing to the radiator and a fourth target cooling liquid flowing to the fan heater;
step S50': the radiator performs heat dissipation treatment on the first target cooling liquid, the second target cooling liquid and the third target cooling liquid which flow in, so that the first target cooling liquid, the second target cooling liquid and the third target cooling liquid which are subjected to heat dissipation treatment flow into the main thermostat as fifth target cooling liquid;
step S60': and after the fan heater carries out heat treatment on the fourth target cooling liquid, enabling the fourth target cooling liquid to flow back to a water inlet of the water pump.
In the embodiment, when the large circulation of the engine cooling system is started, the coolant is pressurized by the mechanical water pump 3 and then divided into two paths, one path flows to the wax thermostat 12, the other path flows into the engine cylinder water jacket 2 and flows to the cylinder head water jacket 1 through the cylinder gasket water hole, part of the coolant flows out to the fan heater 8 through the cylinder head, and the other main coolant flows back to the cylinder body from the cylinder head and flows out from the cylinder body, merges with the coolant flowing through the engine oil cooler 9 and flows to the radiator 4, and then flows through the main valve 61 of the main thermostat 6 through the inlet a on the thermostat valve seat. In addition, the cooling liquid flowing through the wax thermostat 12 is divided into two paths, one path flows to the engine oil cooler 9, the other path flows to the transmission oil cooler 7, and the two paths of cooling liquid flow through the radiator 4 together before flowing to the radiator 4. The cooling liquid flowing through the warm air blower 8 directly flows to the front of the water pump 3 through the port F.
This embodiment can realize that under the major cycle operating mode of engine, main valve 61 of main thermostat 6 is opened, and the coolant liquid that flows through radiator 4 includes the coolant liquid of gearbox oil cooler 7, increases the effective flow who flows through radiator 4, and then improves the cooling effect under the thermal balance operating mode.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number, or order, of the technical features indicated. In the description of the present invention, the meaning of "plurality" means two (two pieces) or two or more (two pieces) unless otherwise specified.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (6)

1. An engine cooling system is characterized by comprising an engine water jacket device, a water pump, a main thermostat, a gearbox oil cooler, a fan heater, an engine oil cooler and a wax thermostat;
the main thermostat is used for acquiring the temperature of cooling liquid in an engine, detecting the opening and closing state of a wax thermostat valve when the temperature of the cooling liquid is smaller than a first preset temperature threshold value, and closing the wax thermostat valve when the wax thermostat valve is in the opening state so as to ensure that no cooling liquid flows through the engine oil cooler and the transmission oil cooler;
the main thermostat is also used for sending a small circulation instruction to the water pump so as to control the water pump to pressurize the cooling liquid in the engine cooling system and obtain small circulation cooling liquid flowing to the engine water jacket device;
the engine water jacket device is used for shunting the small circulating coolant to obtain a first small circulating coolant flowing to a small circulating branch and a second small circulating coolant flowing to the fan heater, controlling the first small circulating coolant to flow into the main thermostat through the small circulating branch, and controlling the second small circulating coolant to flow back to a water inlet of the water pump after being subjected to heat treatment by the fan heater;
a water outlet of the water pump is provided with a first water pump branch and a second water pump branch, the first water pump branch is communicated with the second end of the wax type thermostat, and the second water pump branch is communicated with a liquid inlet of the engine water jacket device; the first end of the wax type thermostat is respectively connected with the second end of the engine oil cooler and the second end of the gearbox oil cooler; a first liquid outlet of the engine water jacket device is provided with a small circulation branch, the small circulation branch is connected with a first end of the main thermostat, and a second end of the main thermostat is connected with a water inlet of the water pump; a second liquid outlet of the engine water jacket device is connected with a first end of the warm air blower, and a second end of the warm air blower is connected with a water inlet of the water pump;
the main thermostat is also used for sending a large circulation instruction to the water pump and opening a valve of the wax thermostat when the temperature of the cooling liquid is greater than a second preset temperature threshold value;
the water pump is also used for responding to a large circulation instruction sent by the main thermostat and pressurizing the cooling liquid to obtain a first path of cooling liquid flowing to the wax thermostat and a second path of cooling liquid flowing to the engine water jacket device;
the wax type thermostat is used for shunting the first path of cooling liquid through the valve to obtain a first target cooling liquid flowing to the engine oil cooler and a second target cooling liquid flowing to the transmission oil cooler;
the engine cooling system further includes a radiator; a first liquid outlet of the engine water jacket device is connected with a first end of the radiator, the first end of the radiator is respectively connected with a first end of the engine oil cooler and a first end of the transmission oil cooler, and a second end of the radiator is connected with a third end of the main thermostat;
the engine water jacket device is also used for shunting the second path of cooling liquid to obtain a third target cooling liquid flowing to the radiator and a fourth target cooling liquid flowing to the fan heater;
the radiator is used for performing heat dissipation treatment on the first target cooling liquid, the second target cooling liquid and the third target cooling liquid which flow in, so that the first target cooling liquid, the second target cooling liquid and the third target cooling liquid which are subjected to heat dissipation treatment flow into the main thermostat as fifth target cooling liquid;
the warm air blower is used for performing heat treatment on the fourth target cooling liquid to enable the fourth target cooling liquid to flow back to a water inlet of the water pump.
2. The engine cooling system of claim 1, wherein the third end of the primary thermostat is provided with a primary valve and the first end of the primary thermostat is provided with a secondary valve;
the main thermostat is further used for closing the main valve and opening the auxiliary valve so as to control the first small circulating coolant to flow into a water inlet of the water pump through the main thermostat.
3. The engine cooling system of claim 2, wherein the primary thermostat is further configured to open the primary valve and close the secondary valve to control the fifth target coolant to flow from the second end of the primary thermostat to the water inlet of the water pump.
4. The engine cooling system of claim 1, wherein the engine water jacket device comprises a water jacket cylinder block and a water jacket cylinder head, the first liquid outlet of the engine water jacket device is disposed at a first end of the water jacket cylinder block, the liquid inlet of the engine water jacket device is disposed at the water jacket cylinder block, and the second liquid outlet of the engine water jacket device is disposed at the water jacket cylinder head.
5. The engine cooling system according to claim 4, wherein the water jacket block is provided with a gasket water hole;
the engine water jacket device is also used for shunting the small circulating cooling liquid through the cylinder gasket water hole, so that part of the cooling liquid of the small circulating cooling liquid is used as second small circulating cooling liquid and flows into the water jacket cylinder cover through the cylinder gasket water hole, and the small circulating cooling liquid flows to the fan heater through the second liquid outlet;
the engine water jacket device is also used for shunting the second path of cooling liquid through the cylinder gasket water hole, so that part of the second path of cooling liquid as a fourth target cooling liquid flows into the water jacket cylinder cover through the cylinder gasket water hole, and the fourth target cooling liquid flows to the fan heater through the second liquid outlet.
6. A control method applied to an engine cooling system according to any one of claims 1 to 5, the control method comprising:
the method comprises the steps that a main thermostat obtains the temperature of cooling liquid in an engine, and when the temperature of the cooling liquid is smaller than a first preset temperature threshold value, the opening and closing state of a wax type thermostat valve is detected;
when the wax type thermostat valve is in an opening state, the main thermostat closes the wax type thermostat valve to ensure that no cooling liquid flows through the engine oil cooler and the transmission oil cooler;
the main thermostat sends a small circulation instruction to the water pump so that the water pump pressurizes the coolant in the engine cooling system to obtain small circulation coolant flowing to the engine water jacket device;
the engine water jacket device divides the small circulating cooling liquid to obtain a first small circulating cooling liquid flowing to a small circulating branch and a second small circulating cooling liquid flowing to the fan heater;
the engine water jacket device controls the first small circulating cooling liquid to flow into the main thermostat through the small circulating branch, and the second small circulating cooling liquid is subjected to heat treatment by the fan heater and then flows back to the water inlet of the water pump;
when the temperature of the cooling liquid is greater than a second preset temperature threshold value, the main thermostat sends a large circulation instruction to the water pump, and a valve of the wax thermostat is opened;
the water pump responds to a large circulation instruction sent by the main thermostat and pressurizes cooling liquid in an engine cooling system to obtain a first path of cooling liquid flowing to the wax thermostat and a second path of cooling liquid flowing to the engine water jacket device;
the wax type thermostat divides the first path of cooling liquid through the valve to obtain a first target cooling liquid flowing to the engine oil cooler and a second target cooling liquid flowing to the transmission oil cooler;
the engine water jacket device divides the second path of cooling liquid to obtain a third target cooling liquid flowing to a radiator and a fourth target cooling liquid flowing to the fan heater;
the radiator performs heat dissipation treatment on the first target cooling liquid, the second target cooling liquid and the third target cooling liquid which flow in, so that the first target cooling liquid, the second target cooling liquid and the third target cooling liquid which are subjected to heat dissipation treatment flow into the main thermostat as fifth target cooling liquid;
and after the fan heater carries out heat treatment on the fourth target cooling liquid, enabling the fourth target cooling liquid to flow back to a water inlet of the water pump.
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CN110905996B (en) * 2019-11-29 2021-04-16 安徽江淮汽车集团股份有限公司 DCT cooling water path control method, DCT cooling water path control device, electronic equipment and storage medium
CN111520227B (en) * 2020-05-08 2021-03-16 蜂巢动力系统(江苏)有限公司 Control method of electronic water pump of engine
CN113859051B (en) * 2020-06-30 2023-10-13 比亚迪股份有限公司 Vehicle and control method of thermal management system thereof
CN111947382A (en) * 2020-08-20 2020-11-17 中南大学 Circulating cooling system and cooling method of vacuum pipeline magnetic suspension train
CN115143007A (en) * 2021-03-30 2022-10-04 广州汽车集团股份有限公司 Temperature control module control method and device and computer storage medium
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Family Cites Families (7)

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DE4131357C1 (en) * 1991-09-20 1992-07-09 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De IC engine cooling installation with engine-driven pump - has electrically driven second pump with external line contg. two thermostatic valves
FR2815299B1 (en) * 2000-10-13 2003-01-24 Renault COOLING SYSTEM AND METHOD FOR A HYBRID PROPULSION VEHICLE
US9611781B2 (en) * 2015-01-09 2017-04-04 GM Global Technology Operations LLC System and method of thermal management for an engine
CN105134357A (en) * 2015-08-05 2015-12-09 安徽江淮汽车股份有限公司 Cooling system of power assembly
CN105179059B (en) * 2015-10-16 2018-05-04 安徽江淮汽车集团股份有限公司 A kind of cooling system for including double expansion tanks
CN107387221A (en) * 2017-08-02 2017-11-24 安徽江淮汽车集团股份有限公司 Engine-cooling system
CN109057942B (en) * 2018-08-23 2020-10-16 重庆长安汽车股份有限公司 Cooling system for increasing warming speed and reducing oil consumption

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