CN110657018A - Multi-channel thermal management system and method for gasoline engine - Google Patents

Multi-channel thermal management system and method for gasoline engine Download PDF

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Publication number
CN110657018A
CN110657018A CN201910854927.4A CN201910854927A CN110657018A CN 110657018 A CN110657018 A CN 110657018A CN 201910854927 A CN201910854927 A CN 201910854927A CN 110657018 A CN110657018 A CN 110657018A
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CN
China
Prior art keywords
engine
temperature
ball valve
thermal management
opening angle
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Pending
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CN201910854927.4A
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Chinese (zh)
Inventor
胡文波
李凯
隋修杰
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FAW Group Corp
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FAW Group Corp
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Priority to CN201910854927.4A priority Critical patent/CN110657018A/en
Publication of CN110657018A publication Critical patent/CN110657018A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00Liquid cooling
    • F01P3/20Cooling circuits not specific to a single part of engine or machine
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/002Cooling
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/005Controlling temperature of lubricant
    • F01M5/007Thermostatic control
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00Controlling of coolant flow
    • F01P7/14Controlling of coolant flow the coolant being liquid
    • F01P7/16Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/165Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00Controlling of coolant flow
    • F01P7/14Controlling of coolant flow the coolant being liquid
    • F01P7/16Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/167Controlling of coolant flow the coolant being liquid by thermostatic control by adjusting the pre-set temperature according to engine parameters, e.g. engine load, engine speed
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00Controlling of coolant flow
    • F01P7/14Controlling of coolant flow the coolant being liquid
    • F01P2007/146Controlling of coolant flow the coolant being liquid using valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00Cooling circuits using auxiliaries
    • F01P2060/04Lubricant cooler

Abstract

The invention belongs to the technical field of engine heat dissipation, and discloses a multi-channel heat management system and a method for a gasoline engine, wherein a first ball valve is arranged in a heat management module and is configured to control the flow of an oil cooler branch by changing the opening angle of the first ball valve; the thermal management module is also provided with a second ball valve, and the second ball valve is configured to control the flow of the circulating branch by changing the opening angle of the second ball valve; the sensor group is used for obtaining the ambient temperature, the engine load, the engine water temperature and the engine oil temperature; the automobile electronic control unit is connected with the sensor group and is configured to control the opening angles of the first ball valve and the second ball valve respectively according to the ambient temperature, the engine load, the engine water temperature and the engine oil temperature. The invention has the beneficial effects that: the multi-channel thermal management system of the gasoline engine can flexibly control the flow of the branch of the oil cooler and the flow of the circulating branch according to the environment temperature, the engine load, the engine water temperature and the engine oil temperature.

Description

Multi-channel thermal management system and method for gasoline engine
Technical Field
The invention relates to the technical field of engine heat dissipation, in particular to a multi-channel heat management system and method for a gasoline engine.
Background
The traditional gasoline engine cooling system is characterized in that a wax type temperature regulator is responsible for switching large and small circulation, the wax type temperature regulator senses the temperature of cooling liquid, and when the temperature of the cooling liquid rises, a wax bag contained in the wax type temperature regulator is heated and expanded to open a valve, so that circulation is opened for cooling. The water temperature of the traditional gasoline engine is fixed after being circularly switched in size, cannot be adjusted along with the change of the environmental temperature and the load of the engine, and in addition, the opening and closing of the circulating branch can be controlled only, and the control of other water flow branches cannot be realized at the same time. These restrictions make the gasoline engine unable to work in the suitable water temperature all the time, are unfavorable for complete machine economic nature and reliability.
Disclosure of Invention
The invention aims to provide a multi-channel thermal management system and a multi-channel thermal management method for a gasoline engine, which aim to solve the problem that the water temperature cannot be adjusted along with the change of the environmental temperature and the load of the engine.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a gasoline engine multichannel thermal management system, includes engine body, thermal management module, machine oil cooler, water pump, radiator unit, automotive electronics control unit and sensor group, wherein:
the engine body, the thermal management module, the oil cooler and the water pump form an oil cooler branch, a first ball valve is arranged in the thermal management module, and the first ball valve is configured to control the flow of the oil cooler branch by changing the opening angle of the first ball valve;
the engine body, the thermal management module, the heat dissipation assembly and the water pump form a circulation branch, a second ball valve is arranged in the thermal management module, and the second ball valve is configured to control the flow of the circulation branch by changing the opening angle of the second ball valve;
the sensor group is used for obtaining the ambient temperature, the engine water temperature and the engine oil temperature;
the automobile electronic control unit is configured to control the opening angles of the first ball valve and the second ball valve according to the ambient temperature, the engine load, the engine water temperature, and the engine oil temperature, respectively.
As a preferable scheme of the multi-channel heat management system of the gasoline engine, the heat management module comprises a water inlet pipeline communicated with the engine body, a first water outlet pipeline communicated with the engine oil cooler and a second water outlet pipeline communicated with the heat dissipation assembly.
As a preferred scheme of the multi-way thermal management system of the gasoline engine, the first ball valve is arranged on the first water outlet pipeline, and the second ball valve is arranged on the second water outlet pipeline.
As an optimal scheme of the multi-channel thermal management system of the gasoline engine, the sensor group comprises a water temperature sensor, an engine oil temperature sensor and an environment temperature sensor, wherein:
the water temperature sensor is configured to detect an engine water temperature of the gasoline engine;
the oil temperature sensor is configured to detect an oil temperature of the gasoline engine;
the ambient temperature sensor is configured to detect an ambient temperature outside the automobile.
The invention also discloses a multi-channel heat management method of the gasoline engine, and the multi-channel heat management system of the gasoline engine comprises the following steps:
controlling the opening angle of the first ball valve according to the environment temperature and the temperature of the engine water;
and after the opening angle of the first ball valve is opened to the maximum angle, controlling the opening angle of the second ball valve according to the engine load and the temperature of the engine water.
As a preferable aspect of the above gasoline engine multi-path thermal management method, the step of controlling the opening angle of the first ball valve according to the ambient temperature and the engine water temperature includes:
the open-loop control method comprises the steps that an open-loop control map table is preset, the abscissa of the open-loop control map table is the ambient temperature, the ordinate is the engine water temperature, and the numerical value in the table is the opening angle of the first ball valve.
As a preferable scheme of the multi-path thermal management method for the gasoline engine, the step of controlling the opening angle of the first ball valve according to the ambient temperature and the temperature of the engine water further includes:
the value of the engine water temperature when the first ball valve corresponding to the ambient temperature in a first temperature interval is opened is larger than the value of the engine water temperature when the first ball valve corresponding to the ambient temperature in a second temperature interval is opened, wherein the temperature values of the second temperature interval are larger than the temperature value of the first temperature interval.
As a preferable embodiment of the multi-path thermal management method for the gasoline engine, the step of controlling the opening angle of the second ball valve according to the engine load and the engine water temperature after the opening angle of the first ball valve is opened to a maximum angle includes:
and presetting a closed-loop control map table, wherein the abscissa of the closed-loop control map table is the engine rotating speed, the ordinate is the engine torque, and the numerical value in the table is the target engine water temperature.
As a preferable embodiment of the above gasoline engine multi-path thermal management method, the step of controlling the opening angle of the second ball valve according to the engine load and the engine water temperature after the opening angle of the first ball valve is opened to a maximum angle further includes:
and comparing the engine water temperature with the target engine water temperature, and adjusting the opening angle of the second ball valve.
As a preferable scheme of the multi-path thermal management method for the gasoline engine, in the closed-loop control map table, target engine water temperatures corresponding to a first rotation speed interval and a first torque interval are higher than target engine water temperatures corresponding to a second rotation speed interval and a second torque interval, wherein rotation speed values of the first rotation speed interval are smaller than rotation speed values of the second rotation speed interval, and torque values of the second torque interval are smaller than rotation speed values of the second torque interval.
The invention has the beneficial effects that:
1. an electric control ball valve type multi-channel heat management module is adopted to replace a traditional wax type temperature regulator, so that the quick intelligent regulation of the opening and closing of the two branches is realized;
2. when the gasoline engine is in cold start, the two water outlet pipelines are completely closed, so that the flow of the cooling system is 0, and the warming speed is greatly increased;
3. adjusting the opening temperature of a first valve on a branch of an oil cooler based on the ambient temperature, and considering both the heating effect and the oil consumption performance of the whole machine;
4. the opening angle of the second ball valve on the circulation branch is continuously adjusted to ensure that the actual water temperature changes along with the change of the target engine water temperature under the corresponding working condition, so that the gasoline engine always works at the proper water temperature;
5. when the water temperature of the engine or the engine oil temperature reaches the warning temperature, the thermal management module controls all ball valves to force 100% of the valves to be fully opened, and the gasoline engine is protected from being damaged.
Drawings
Fig. 1 is a connection diagram of a multi-pass thermal management system of a gasoline engine according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1, the invention provides a multi-channel thermal management system for a gasoline engine, which comprises an engine body, a thermal management module, an engine oil cooler, a water pump, a heat dissipation assembly, an automotive electronic control unit and a sensor group, wherein the engine body, the thermal management module, the engine oil cooler and the water pump form an engine oil cooler branch, a first ball valve is arranged in the thermal management module, and the first ball valve is configured to control the flow of the engine oil cooler branch by changing the opening angle of the first ball valve; the engine body, the thermal management module, the heat dissipation assembly and the water pump form a circulation branch, a second ball valve is arranged in the thermal management module, and the second ball valve is configured to control the flow of the circulation branch by changing the opening angle of the second ball valve; the sensor group is used for obtaining the ambient temperature, the engine load, the engine water temperature and the engine oil temperature; the automobile electronic control unit is connected with the sensor group and is configured to control the opening angles of the first ball valve and the second ball valve according to the ambient temperature, the engine load, the engine water temperature and the engine oil temperature.
Namely, hot water in the engine body can be cooled by the heat management module, the engine oil cooler and the water pump and then circulates to the engine body in the form of cold water; or the hot water in the engine body can be cooled by the heat management module, the heat dissipation module and the water pump and then circulated to the engine body in the form of cold water; and the automobile electronic control unit is used for controlling the opening angles of the first ball valve and the second ball valve.
The heat management module comprises a water inlet pipeline communicated with the engine body, a first water outlet pipeline communicated with the engine oil cooler and a second water outlet pipeline communicated with the heat dissipation assembly. Namely, the heat management module is internally provided with a 'one-inlet and two-outlet' layout for respectively carrying out two kinds of water path circulation.
In addition, it should be noted that the first water outlet pipeline belongs to a section of the engine oil cooler branch, the second water outlet pipeline belongs to a section of the circulating branch, and the first water outlet pipeline and the second water outlet pipeline are not interfered with each other.
In addition, the first water outlet pipeline is provided with a first ball valve, the second water outlet pipeline is provided with a second ball valve, namely the first water outlet pipeline is opened and closed through the first ball valve, the opening angles of the first ball valves are different, the flow rates of the first water outlet pipelines are different, and the generated heat dissipation effects are different; similarly, the second water outlet pipeline is opened and closed through the second ball valve, the opening angles of the second ball valve are different, the flow rates of the second water outlet pipelines are different, and the generated heat dissipation effects are also different.
It should be noted that, the embodiment is not limited to two ball valves, and it is also possible to adopt one ball valve inside the thermal management module and control the opening and closing of the first water outlet pipeline and the second water outlet pipeline respectively, and the invention is not limited thereto.
The sensor group includes water temperature sensor, machine oil temperature sensor, ambient temperature sensor and engine load sensor, wherein: the water temperature sensor is configured to detect an engine water temperature of the gasoline engine; the oil temperature sensor is configured to detect an oil temperature of the gasoline engine; the ambient temperature sensor is configured to detect an ambient temperature outside the automobile.
The heat dissipation assembly includes a heat sink and a fan. In this embodiment, the radiator contains a coolant.
The invention also discloses a multi-channel heat management method of the gasoline engine, which comprises the following steps:
controlling the opening angle of the first ball valve according to the environment temperature and the water temperature of the engine;
and after the opening angle of the first ball valve is opened to the maximum angle, controlling the opening angle of the second ball valve according to the engine load and the water temperature of the engine.
In this embodiment, when the automobile is cold-started, the ambient temperature and the engine water temperature are detected first, and if the ambient temperature is low, the opening angle of the first ball valve is controlled to be 0 °, that is, the first ball valve is closed, the first water outlet pipeline is closed, and the second water outlet pipeline is also closed all the time. When the temperature of the engine water rises to the opening temperature of the branch of the engine oil cooler, the branch ball valve is gradually opened along with the rising of the temperature of the engine water until the branch ball valve is fully opened. In the running process, the first water outlet pipeline is fully opened, when the water temperature continues to rise and enters a normal working mode, the second ball valve of the second water outlet pipeline is controlled within the range of 0-100% of opening degree according to the engine load and is continuously adjusted, the actual water temperature is ensured to change along with the target engine water temperature change corresponding to the engine working condition, and the gasoline engine is enabled to work at the proper water temperature all the time.
Specifically, the step of controlling the opening angle of the first ball valve according to the ambient temperature and the engine water temperature includes: an open-loop control map table is preset, the abscissa of the open-loop control map table is the ambient temperature, the ordinate of the open-loop control map table is the engine water temperature, and the numerical value in the table is the opening angle of the first ball valve.
That is, in the open-loop control map table, for example, the abscissa is the ambient temperature of-25 ℃ to 50 ℃, the ordinate is the water temperature of-40 ℃ to 120 ℃, and each ambient temperature and one water temperature are grouped and correspond to the opening angle of one first ball valve.
For example, when the ambient temperature is 0 ℃, and the water temperature is 5 ℃, the opening angle of the first ball valve is 0, and the opening angle of the second ball valve is also 0, so that the flow of the whole cooling system is 0, and the water temperature of the engine can be rapidly increased conveniently. When the ambient temperature is 20 ℃ and the temperature of the engine water is 30 ℃, the opening angle of the first ball valve is 40 ℃, and the first water outlet pipeline is opened to promote the temperature reduction of the engine to a certain extent.
Further, the step of controlling the opening angle of the first ball valve according to the ambient temperature and the engine water temperature further comprises: the value of the engine water temperature when the first ball valve corresponding to the ambient temperature in the first temperature interval is opened is larger than the value of the engine water temperature when the first ball valve corresponding to the ambient temperature in the second temperature interval is opened, wherein the temperature values of the second temperature interval are larger than the temperature value of the first temperature interval.
The method has the advantages that because users with different environmental temperatures have different requirements on the warm air, in order to ensure the warm air effect at low temperature, the set value of the water temperature of the engine when the branch of the engine oil cooler at low temperature is opened is higher than the set value at normal temperature and in high temperature, so that the heat energy contained in the anti-freezing solution of the engine at low temperature is supplied to the warm air instead of being absorbed by the engine oil through the engine oil cooler.
The first temperature range in this embodiment means a low temperature range, preferably 5 ℃ or less; the second temperature range represents a normal temperature range or a high temperature range, for example, 20 ℃ to 40 ℃. Namely, when the ambient temperature is 0 ℃, the engine water temperature when the first ball valve is opened is correspondingly enabled to be 30 ℃, and when the ambient temperature is 30 ℃, the engine water temperature when the first ball valve is opened is correspondingly enabled to be 20 ℃, so that the warm air effect at low temperature and the heat radiation effect at high temperature are ensured.
Further, the step of controlling the opening angle of the second ball valve according to the engine load and the engine water temperature after the opening angle of the first ball valve is opened to the maximum angle includes:
a closed-loop control map table is preset, the abscissa of the closed-loop control map table is engine rotating speed, the ordinate of the closed-loop control map table is engine torque, and the numerical value in the table is target engine water temperature.
That is, the engine load is evaluated based on the engine speed and the engine torque.
That is, in the closed-loop control map table, for example, the range of the number of revolutions on the abscissa of 0 to 8000 rpm and the range of the torque on the ordinate of 0 to 350N · m correspond to one target engine water temperature for each revolution and one torque.
For example, when the rotation speed is 5500 revolutions per minute and the torque is 238N · m, the target engine water temperature is 95 ℃.
Further, the step of controlling the opening angle of the second ball valve according to the engine load and the engine water temperature after the opening angle of the first ball valve is opened to the maximum angle further includes:
and comparing the water temperature of the engine with the target water temperature of the engine, and adjusting the opening angle of the second ball valve.
According to the above embodiment, when the actual water temperature is 85 ℃ at a rotation speed of 5500 rpm and a torque of 238N · m, the opening of the radiator branch is gradually reduced to reduce the flow rate of water passing through the radiator, and if the actual water temperature is high, the reverse operation is performed.
In addition, in the closed-loop control map table, the target engine water temperatures corresponding to the first rotating speed interval and the first torque interval are higher than the target engine water temperatures corresponding to the second rotating speed interval and the second torque interval, wherein the rotating speed values of the first rotating speed interval are all smaller than the rotating speed value of the second rotating speed interval, and the torque values of the second torque interval are all smaller than the rotating speed value of the second torque interval.
In other words, in the closed-loop control map table, the target engine water temperature corresponding to low rotation speed and small torque is higher, so as to improve the economy of the engine; the target engine water temperature corresponding to a high rotation speed and a large torque is low, and the reliability is improved in order to reduce the tendency of engine knocking. It should be noted that, a person skilled in the art can perform custom setting according to different vehicle models when determining the rotation speed and the torque.
It should be noted that the closed-loop control map table is not unique, multiple maps can be prestored and switched in real time based on the ambient temperature, the overall target engine water temperature in the low-temperature map is higher, and the overall target engine water temperature in the high-temperature map is lower, so that the engine knocking tendency in the high-temperature environment is reduced, and the reliability is improved.
In a preferred embodiment, when the temperature of the water or the temperature of the engine oil reaches a preset warning temperature, the thermal management module controls the first ball valve and the second ball valve to be forced to be fully opened by 100 percent, so that the gasoline engine is protected from being damaged.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The utility model provides a gasoline engine multichannel thermal management system which characterized in that, includes engine body, thermal management module, machine oil cooler, water pump, radiator unit, automotive electronics control unit and sensor group, wherein:
the engine body, the thermal management module, the oil cooler and the water pump form an oil cooler branch, a first ball valve is arranged in the thermal management module, and the first ball valve is configured to control the flow of the oil cooler branch by changing the opening angle of the first ball valve;
the engine body, the thermal management module, the heat dissipation assembly and the water pump form a circulation branch, a second ball valve is arranged in the thermal management module, and the second ball valve is configured to control the flow of the circulation branch by changing the opening angle of the second ball valve;
the sensor group is used for obtaining the ambient temperature, the engine water temperature and the engine oil temperature;
the automobile electronic control unit is configured to control the opening angles of the first ball valve and the second ball valve according to the ambient temperature, the engine load, the engine water temperature, and the engine oil temperature, respectively.
2. The gasoline engine multichannel thermal management system of claim 1, characterized in that, the thermal management module includes a water inlet pipeline that communicates with the engine body, and a first water outlet pipeline that communicates with the oil cooler and a second water outlet pipeline that communicates with the heat dissipation assembly respectively.
3. The gasoline engine multichannel thermal management system of claim 2, characterized in that, the first outlet pipe is provided with the first ball valve, and the second outlet pipe is provided with the second ball valve.
4. The gasoline engine multichannel thermal management system of claim 3, wherein the sensor group includes a water temperature sensor, an engine oil temperature sensor, and an ambient temperature sensor, wherein:
the water temperature sensor is configured to detect an engine water temperature of the gasoline engine;
the oil temperature sensor is configured to detect an oil temperature of the gasoline engine;
the ambient temperature sensor is configured to detect an ambient temperature outside the automobile.
5. A gasoline engine multi-channel thermal management method, which utilizes the gasoline engine multi-channel thermal management system of claim 3 or 4, and is characterized by comprising the following steps:
controlling the opening angle of the first ball valve according to the environment temperature and the temperature of the engine water;
and after the opening angle of the first ball valve is opened to the maximum angle, controlling the opening angle of the second ball valve according to the engine load and the temperature of the engine water.
6. The gasoline engine multi-pass thermal management method of claim 5, wherein the step of controlling the opening angle of the first ball valve according to the ambient temperature and the engine water temperature comprises:
the open-loop control method comprises the steps that an open-loop control map table is preset, the abscissa of the open-loop control map table is the ambient temperature, the ordinate is the engine water temperature, and the numerical value in the table is the opening angle of the first ball valve.
7. The gasoline engine multichannel thermal management method of claim 6, wherein the step of controlling the opening angle of the first ball valve according to the ambient temperature and the engine water temperature further comprises:
the value of the engine water temperature when the first ball valve corresponding to the ambient temperature in a first temperature interval is opened is larger than the value of the engine water temperature when the first ball valve corresponding to the ambient temperature in a second temperature interval is opened, wherein the temperature values of the second temperature interval are larger than the temperature value of the first temperature interval.
8. The gasoline engine multi-pass thermal management method of claim 7, wherein the step of controlling the opening angle of the second ball valve according to the engine load and the engine water temperature after the opening angle of the first ball valve is opened to a maximum angle comprises:
and presetting a closed-loop control map table, wherein the abscissa of the closed-loop control map table is the engine rotating speed, the ordinate is the engine torque, and the numerical value in the table is the target engine water temperature.
9. The gasoline engine multi-pass thermal management method of claim 8, wherein the step of controlling the opening angle of the second ball valve according to the engine load and the engine water temperature after the opening angle of the first ball valve is opened to a maximum angle further comprises:
and comparing the engine water temperature with the target engine water temperature, and adjusting the opening angle of the second ball valve.
10. The multi-path thermal management method for the gasoline engine according to claim 8, wherein in the closed-loop control map table, the target engine water temperatures corresponding to a first rotation speed interval and a first torque interval are higher than the target engine water temperatures corresponding to a second rotation speed interval and a second torque interval, wherein the rotation speed values of the first rotation speed interval are smaller than the rotation speed values of the second rotation speed interval, and the torque values of the second torque interval are smaller than the rotation speed values of the second torque interval.
CN201910854927.4A 2019-09-10 2019-09-10 Multi-channel thermal management system and method for gasoline engine Pending CN110657018A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111561381A (en) * 2020-04-20 2020-08-21 中国第一汽车股份有限公司 Intelligent closed-loop control heat management method for gasoline engine based on electric water pump

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Application publication date: 20200107