CN114076023B - Engine heat management system, engine heat management method and vehicle - Google Patents

Engine heat management system, engine heat management method and vehicle Download PDF

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Publication number
CN114076023B
CN114076023B CN202010819747.5A CN202010819747A CN114076023B CN 114076023 B CN114076023 B CN 114076023B CN 202010819747 A CN202010819747 A CN 202010819747A CN 114076023 B CN114076023 B CN 114076023B
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Prior art keywords
control valve
engine
temperature
oil cooler
information
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CN114076023A (en
Inventor
岳辉
黄秋萍
朱福堂
王春生
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BYD Co Ltd
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BYD Co Ltd
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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
    • 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
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
    • F01N3/043—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids without contact between liquid and exhaust gases
    • 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
    • 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
    • F01P7/167—Controlling 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
    • 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
    • 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)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

The invention discloses an engine heat management system, an engine heat management method and a vehicle, wherein the engine heat management system comprises the following components: the cooling liquid circulation module comprises an engine oil cooler, a radiator, a heater, a gearbox oil cooler and an electronic pump; the thermal management control module comprises a control module, a first control valve, a second control valve and a third control valve; the control module is respectively connected with the first control valve, the second control valve and the third control valve, and is used for acquiring temperature information and heat exchange demand information of the cooling circulation module and whole vehicle running state information, and controlling the first control valve, the second control valve and the third control valve according to the temperature information, the heat exchange demand information and the whole vehicle running state information. The engine thermal management system can realize accurate control of the flow of the cooling liquid and reduce the cost.

Description

Engine heat management system, engine heat management method and vehicle
Technical Field
The invention relates to the technical field of vehicles, in particular to an engine heat management system, an engine heat management method and a vehicle.
Background
With the release of new vehicle energy consumption and emission regulations, the national requirements on vehicle energy consumption and emission are more and more strict, the requirements on thermal management of vehicles are more and more high, the prior thermal management concept of only carrying out rough cooling on all subsystems and gearboxes of an engine can not meet the requirements on the new policy regulations and vehicle technical conditions, and the thermal management system of the engine has great influence on the fuel economy and driving reliability of the whole vehicle and even emission.
In the related art, an engine cooling system with a patent publication number of CN108979826a is generally adopted, and the engine cooling system forms four closed cooling circuits, namely a booster cooling circuit, a warm air circuit, a large circulation circuit and an oil cooler circuit, by each functional component and a plurality of three-way valves, one-way valves and pipeline connectors. However, the engine cooling system has more complicated pipelines, and parts such as a plurality of electromagnetic valves, three-way valves, one-way valves, water valves, sensors and the like are arranged on each circulating pipeline, so that the cabin arrangement is difficult due to the limited cabin space of the whole vehicle, the arrangement cost is higher, the functions of each type of control valve are single, and the accurate distribution of the flow of the cooling liquid and the accurate control of the temperature of the cooling liquid cannot be realized.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide an engine thermal management system that can achieve accurate control of coolant flow and reduce costs.
The second objective of the present invention is to provide a thermal management method for an engine.
A third object of the present invention is to provide a vehicle.
In order to solve the above problem, an embodiment of a first aspect of the present invention provides an engine thermal management system, including: the cooling liquid circulation module comprises an engine water jacket, an engine oil cooler, a turbocharger, a radiator, a warm air blower, a gearbox oil cooler and an electronic pump, wherein a cooling liquid inlet of the turbocharger, a cooling liquid inlet of the engine oil cooler, a cooling liquid inlet of the radiator, a cooling liquid inlet of the warm air blower and a cooling liquid inlet of the gearbox oil cooler are communicated with a cooling liquid outlet of the engine water jacket, a cooling liquid inlet of the electronic pump is communicated with a cooling liquid outlet of the turbocharger, a cooling liquid outlet of the engine oil cooler, a cooling liquid outlet of the radiator, a cooling liquid outlet of the warm air blower and a cooling liquid outlet of the gearbox oil cooler, and a cooling liquid outlet of the electronic pump is connected with a cooling liquid backflow port of the engine water jacket; the heat management control module comprises a control module, a first control valve, a second control valve and a third control valve, wherein the first control valve is arranged on a connecting pipeline of a cooling liquid inlet of the heater and a cooling liquid outlet of the engine water jacket, the second control valve is arranged on a connecting pipeline of a cooling liquid inlet of the gearbox oil cooler and a cooling liquid outlet of the engine water jacket, and the third control valve is arranged on a connecting pipeline of a cooling liquid inlet of the radiator and a cooling liquid outlet of the engine water jacket; the control module is respectively connected with the first control valve, the second control valve and the third control valve, and is used for acquiring temperature information and heat exchange demand information of the cooling circulation module and whole vehicle running state information, and controlling the first control valve, the second control valve and the third control valve according to the temperature information, the heat exchange demand information and the whole vehicle running state information.
According to the engine thermal management system provided by the embodiment of the invention, based on the first control valve, the second control valve and the third control valve which are arranged by the thermal management control module, the temperature information and the heat exchange requirement information of the cooling circulation module and the whole vehicle running state information are obtained by the control module, and the valve opening states of the first control valve, the second control valve and the third control valve are controlled according to the temperature information, the heat exchange requirement information and the whole vehicle running state information.
In some embodiments, the coolant circulation module further comprises: the first input end of the three-way valve is connected with the cooling liquid outlet of the heater, the second input end of the three-way valve is connected with the cooling liquid outlet of the gearbox oil cooler, and the output end of the three-way valve is connected with the cooling liquid outlet of the electronic pump.
In some embodiments, the control module includes: the data receiving unit is used for receiving the outlet temperature of the radiator, the outlet temperature of the heater, the outlet temperature of the engine oil cooler and the outlet temperature of the gearbox oil cooler, cooling requirement information of the radiator, warm air requirement information of the heater and heating/cooling requirement information of the gearbox oil cooler and running state information of the whole vehicle; an engine temperature sensor for acquiring an outlet temperature of the engine; and the control unit is respectively connected with the data receiving unit and the engine temperature sensor and is used for controlling the valve on-off state of any one of the first control valve, the second control valve and the third control valve according to the outlet temperature of the radiator, the outlet temperature of the warm air heater, the outlet temperature of the engine oil cooler and the outlet temperature of the gearbox oil cooler, the outlet temperature of the engine, the cooling requirement information of the radiator, the warm air requirement information of the warm air heater and the heating/cooling requirement information of the gearbox oil cooler and the whole vehicle running state information.
In some embodiments, the control unit, when controlling the valve on-off state of any one of the first control valve, the second control valve, and the third control valve, is configured to perform at least one of: according to the warm air demand information of the warm air device, if the warm air demand is determined, the first control valve is controlled to be opened; the heating/cooling requirement is determined according to the heating/cooling requirement information of the gearbox oil cooler, and the second control valve is controlled to be opened; and if the cooling requirement is determined according to the cooling requirement information of the radiator, controlling the third control valve to be opened.
In some embodiments, the control unit is further configured to determine an operation condition of the engine according to an outlet temperature of the radiator, an outlet temperature of the heater, an outlet temperature of the engine oil cooler and an outlet temperature of the transmission oil cooler, an outlet temperature of the engine, and the vehicle operation state information when controlling a valve on-off state of any one of the first control valve, the second control valve, and the third control valve, wherein the operation condition includes a warm-up condition, a warm-air condition, and a large circulation condition; and controlling the valve on-off state of any one of the first control valve, the second control valve and the third control valve according to the operation condition of the engine.
In some embodiments, the control unit is configured to control, when controlling a valve on-off state of any one of the first control valve, the second control valve, and the third control valve according to an operation condition in which the engine is located, to control, when in the warm-up condition, the first control valve, the second control valve, and the third control valve to be closed, or to control, when in the warm-air condition, the second control valve and the third control valve to be opened and to control the first control valve to be closed, or to control, when in the large-cycle condition, the first control valve, the second control valve, and the third control valve to be opened.
In some embodiments, the control unit is further configured to calculate an opening degree of a control valve according to heat exchange requirement information of the coolant circulation module to control the opening of the corresponding control valve, obtain an engine target operating temperature according to an operating condition of the engine, and adjust the opening degree of the control valve according to the engine target operating temperature and an outlet temperature of the engine.
An embodiment of a second aspect of the present invention provides an engine thermal management method for the engine thermal management system described in the above embodiment, including: acquiring temperature information and heat exchange demand information of the cooling circulation module and whole vehicle running state information; and controlling the first control valve, the second control valve and the third control valve according to the temperature information, the heat exchange demand information and the whole vehicle running state information.
According to the engine heat management method provided by the embodiment of the invention, based on the heat management control module arranged in the engine heat management system, the temperature information and the heat exchange demand information of the cooling circulation module and the whole vehicle running state information are obtained through the control module in the heat management control module, and the opening degrees of the first control valve, the second control valve and the third control valve are controlled according to the temperature information, the heat exchange demand information and the whole vehicle running state information.
In some embodiments, obtaining temperature information and heat exchange requirement information of the cooling cycle module and vehicle running state information includes: the method comprises the steps of obtaining outlet temperature of a radiator, outlet temperature of a warm air device, outlet temperature of an engine oil cooler, outlet temperature of a gearbox oil cooler and outlet temperature of an engine, obtaining cooling requirement information of the radiator, warm air requirement information of the warm air device, heating/cooling requirement information of the gearbox oil cooler and obtaining running state information of the whole vehicle.
In some embodiments, controlling the first control valve, the second control valve, and the third control valve according to the temperature information, the heat exchange requirement information, and the vehicle operation state information includes: and controlling the valve on-off state of any one of the first control valve, the second control valve and the third control valve according to the outlet temperature of the radiator, the outlet temperature of the heater, the outlet temperature of the engine oil cooler and the outlet temperature of the gearbox oil cooler, the outlet temperature of the engine, the cooling requirement information of the radiator, the heating requirement information of the heater, the heating/cooling requirement information of the gearbox oil cooler and the whole vehicle running state information.
In some embodiments, controlling the valve on-off state of any one of the first control valve, the second control valve, and the third control valve according to the outlet temperature of the radiator, the outlet temperature of the heater, the outlet temperature of the engine oil cooler, and the outlet temperature of the transmission oil cooler, the outlet temperature of the engine, the cooling demand information of the radiator, the warm air demand information of the heater, and the heating/cooling demand information of the transmission oil cooler, and the vehicle operation state information includes performing at least one of: according to the warm air demand information of the warm air device, if the warm air demand is determined, the first control valve is controlled to be opened; the heating/cooling requirement is determined according to the heating/cooling requirement information of the gearbox oil cooler, and the second control valve is controlled to be opened; and if the cooling requirement is determined according to the cooling requirement information of the radiator, controlling the third control valve to be opened.
In some embodiments, controlling the valve on-off state of any one of the first control valve, the second control valve, and the third control valve according to the outlet temperature of the radiator, the outlet temperature of the heater, the outlet temperature of the engine oil cooler, and the outlet temperature of the transmission oil cooler, the outlet temperature of the engine, the cooling demand information of the radiator, the warm air demand information of the heater, and the heating/cooling demand information of the transmission oil cooler, and the vehicle operation state information further includes: determining an operation condition of the engine according to the outlet temperature of the radiator, the outlet temperature of the heater, the outlet temperature of the engine oil cooler, the outlet temperature of the gearbox oil cooler, the outlet temperature of the engine and the whole vehicle operation state information, wherein the operation condition comprises a warm-up condition, a warm-air condition and a large circulation condition; and controlling the valve on-off state of any one of the first control valve, the second control valve and the third control valve according to the operation condition of the engine.
In some embodiments, controlling the valve opening and closing state of any one of the first control valve, the second control valve, and the third control valve according to an operating condition in which the engine is located includes: when the heating working condition is met, the first control valve, the second control valve and the third control valve are controlled to be closed; or when the warm air working condition is met, the second control valve and the third control valve are controlled to be opened, and the first control valve is controlled to be closed; or, during the large circulation condition, the first control valve, the second control valve and the third control valve are all controlled to be opened.
In some embodiments, the engine thermal management method further comprises: calculating the opening degree of a control valve according to the heat exchange demand information of the cooling liquid circulation module so as to control the opening of the corresponding control valve; obtaining a target working temperature of the engine according to the operating condition of the engine; and adjusting the opening degree of a control valve according to the target working temperature of the engine and the outlet temperature of the engine.
In some embodiments, obtaining the engine target operating temperature based on the operating conditions in which the engine is operating comprises: the rotating speed of the engine is smaller than the first rotating speed, the load is smaller than the first load, and the target working temperature of the engine is set to be a first temperature; the rotating speed of the engine is larger than the second rotating speed and the load is larger than the second load, and the target working temperature of the engine is set to be a second temperature, wherein the second temperature is lower than the first temperature.
An embodiment of a third aspect of the present invention provides a vehicle, including an engine and the engine thermal management system described in the above embodiment.
According to the vehicle provided by the embodiment of the invention, by adopting the engine thermal management system provided by the embodiment of the invention, the accurate control of the temperature of the cooling liquid and the intelligent distribution of the flow of the cooling liquid can be realized, unnecessary flow and heat loss can be avoided, the energy utilization rate is improved, the energy consumption is reduced, the space arrangement of the whole vehicle can be optimized, and the cost is reduced.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a block diagram of an engine thermal management system according to one embodiment of the invention;
FIG. 2 is a block diagram of an engine thermal management system according to another embodiment of the invention;
FIG. 3 is a functional schematic diagram illustrating a warm-up condition according to one embodiment of the present invention;
FIG. 4 is a block diagram of a control module according to one embodiment of the invention;
FIG. 5 is a policy control diagram of a control module according to one embodiment of the invention;
FIG. 6 is a functional schematic diagram of a warm air condition according to one embodiment of the present invention;
FIG. 7 is a functional schematic diagram of a large cycle condition according to one embodiment of the present invention;
FIG. 8 is a flow chart of a method of engine thermal management according to one embodiment of the invention;
fig. 9 is a block diagram of a vehicle according to an embodiment of the invention.
Reference numerals:
an engine thermal management system 10; a coolant circulation module 20; a thermal management control module 30;
An engine water jacket 1; an engine oil cooler 2; a turbocharger 3; a radiator 4; a heater 5; a gearbox oil cooler 6; an electronic pump 7; a control module 8; a first control valve 11; a second control valve 12; a third control valve 13; a temperature sensor 9; a four-way valve 14; a data receiving unit 15; an engine temperature sensor 16; a control unit 17;
a vehicle 100; an engine 40.
Detailed Description
Embodiments of the present invention will be described in detail below, by way of example with reference to the accompanying drawings.
In order to solve the above problems, an engine thermal management system according to an embodiment of the first aspect of the present invention, which can achieve accurate control of coolant flow and reduce costs, is described below with reference to the accompanying drawings.
Fig. 1 is a block diagram of an engine thermal management system according to an embodiment of the present invention, and as shown in fig. 1, an engine thermal management system 10 according to an embodiment of the present invention includes a coolant circulation module 20 and a thermal management control module 30.
In an embodiment, as shown in fig. 2 or 3, the coolant circulation module 20 includes an engine water jacket 1, an engine oil cooler 2, a turbocharger 3, a radiator 4, a heater 5, a transmission oil cooler 6, and an electronic pump 7. The cooling liquid inlet of the turbocharger 3, the cooling liquid inlet of the engine oil cooler 2, the cooling liquid inlet of the radiator 4, the cooling liquid inlet of the heater 5 and the cooling liquid inlet of the gearbox oil cooler 6 are all communicated with the cooling liquid outlet of the engine water jacket 1, the cooling liquid inlet of the electronic pump 7 is respectively connected with the cooling liquid outlet of the turbocharger 3, the cooling liquid outlet of the engine oil cooler 2, the cooling liquid outlet of the radiator 4, the cooling liquid outlet of the heater 5 and the cooling liquid outlet of the gearbox oil cooler 6, and the cooling liquid outlet of the electronic pump 7 is connected with the cooling liquid reflux port of the engine water jacket 1.
And, as shown in fig. 2, the thermal management control module 30 includes a control module 8 (not shown in the drawing), a first control valve 11, a second control valve 12, and a third control valve 13, wherein the first control valve 11 is provided on a connection line of a coolant inlet of the radiator 5 and a coolant outlet of the engine water jacket 1, the second control valve 12 is provided on a connection line of a coolant inlet of the transmission oil cooler 6 and a coolant outlet of the engine water jacket 1, and the third control valve 13 is provided on a connection line of a coolant inlet of the radiator 4 and a coolant outlet of the engine water jacket 1. And the control module 8 is respectively connected with the first control valve 11, the second control valve 12 and the third control valve 13, and is used for acquiring temperature information and heat exchange requirement information of the cooling circulation module 20 and vehicle running state information, and controlling the first control valve 11, the second control valve 12 and the third control valve 13 according to the temperature information, the heat exchange requirement information and the vehicle running state information.
Specifically, during operation, the heat management control module 30 is connected with a coolant outlet of the engine water jacket 1, after the coolant enters the heat management control module 30, the control module 30 is connected with the first control valve 11, the second control valve 12 and the third control valve 13 based on the control module 8 in the heat management control module 30, and the valve opening state of each control valve is controlled according to the temperature information and the heat exchange requirement information of the cooling circulation module 20 and the running state information of the whole vehicle by the control module 30, that is, the control module 30 can output opening control signals to the first control valve 11, the second control valve 12 and the third control valve 13, and feed back opening state signals to the control module 30 by the first control valve 11, the second control valve 12 and the third control valve 13, so that the purpose of controlling the water outlet state of each flow path is achieved.
In an embodiment, as shown in fig. 2, a thermal management control module 30 is arranged at a water outlet position of an engine, and integrates a plurality of cavities for collecting cooling liquid from an engine water jacket 1, and then flows into components such as an engine oil cooler 2, a turbocharger 3, a transmission oil cooler 6, a radiator 4 and a warm air blower 5 respectively through a plurality of circulation channels for distribution, wherein a branch leading to the engine oil cooler 2 and a branch leading to the turbocharger 3 are not controlled by the thermal management control module 30, and are in a normal-open state, compared with a small circulation pipeline of an existing engine cooling system, the thermal management control module is more beneficial to quick warm-up of the engine, and a first control valve 11 is used for controlling the cooling liquid to flow from the engine water jacket 1 to a large circulation branch, a second control valve 12 is used for controlling the cooling liquid to flow from the engine water jacket 1 to the transmission oil cooler 6, and a third control valve 13 is used for controlling the cooling liquid to flow from the engine water jacket 1 to the air conditioner air blower 5 branch, and can simultaneously control opening and closing of each valve through the control module 30, so that accurate control of the flow of the cooling liquid is realized.
In the embodiment, the control valve can adopt an electromagnetic valve, and the electromagnetic valve is controlled by the control module 30, so that the on-off of each pipeline can be controlled, and the flow of the cooling liquid can be regulated.
According to the engine thermal management system 10 of the embodiment of the invention, based on the first control valve 11, the second control valve 12 and the third control valve 13 set by the thermal management control module 30, the temperature information, the heat exchange requirement information and the whole vehicle running state information of the cooling circulation module 20 are obtained through the control module 8, and the valve opening states of the first control valve 11, the second control valve 12 and the third control valve 13 are controlled according to the temperature information, the heat exchange requirement information and the whole vehicle running state information.
In some embodiments, as shown in fig. 3, the coolant circulation module 30 of the embodiment of the present invention further includes a three-way valve 14, a first input end of the three-way valve 14 is connected to the coolant outlet of the heater 5, a second input end of the three-way valve 14 is connected to the coolant outlet of the gearbox oil cooler 6, and an output end of the three-way valve 14 is connected to the coolant outlet of the electronic pump 7.
In some embodiments, as shown in fig. 4, the control module 8 of the embodiment of the present invention includes a data receiving unit 15, an engine temperature sensor 16, and a control unit 17.
Specifically, the data receiving unit 15 is configured to receive the outlet temperature of the radiator 4, the outlet temperature of the heater 5, the outlet temperature of the engine oil cooler 2, and the outlet temperature of the transmission oil cooler 6, and to receive cooling requirement information of the radiator 4, warm air requirement information of the heater 5, and heating/cooling requirement information of the transmission oil cooler 6, and to receive whole vehicle operation state information; the engine temperature sensor 16 is used for acquiring the outlet temperature of the engine; the control unit 17 is connected to the data receiving unit 15 and the engine temperature sensor 16, respectively, for controlling the valve on-off state of any one of the first control valve 11, the second control valve 12, and the third control valve 13 according to the outlet temperature of the radiator 4, the outlet temperature of the heater 5, the outlet temperature of the engine oil cooler 2, and the outlet temperature of the transmission oil cooler 6, the outlet temperature of the engine, cooling demand information of the radiator 4, warm air demand information of the heater 5, and heating/cooling demand information of the transmission oil cooler 6, and the vehicle operation state information.
That is, the control module 8 includes a data receiving unit 15, an engine temperature sensor 16 and a control unit 17, by combining with a control strategy to determine whether the temperature exceeds a certain set value, and combining with the requirements of an ECU (Electronic Control Unit, an electronic control unit), a TCU (Transmi ssion Control Unit, an automatic transmission control unit) and an air conditioner controller in the vehicle, by integrally controlling the opening of each control valve in the vehicle, the cooling liquid is intelligently distributed in flow, so as to realize accurate thermal management, and realize on-demand switching of the large cycle and the small cycle of the engine, and realize on-demand heating and cooling of the gearbox oil cooler 6, and realize on-demand supply of the branch hot air of the heater 5 and enhance the hot air effect.
In some embodiments, the control unit 17 of the embodiment of the present invention is configured to perform at least one of the following when controlling the valve switching state of any one of the first control valve 11, the second control valve 12, and the third control valve 13: according to the warm air demand information of the warm air device 5, if the warm air demand is determined, the first control valve 11 is controlled to be opened; determining that there is a heating/cooling demand according to the heating/cooling demand information of the transmission oil cooler 6, and controlling the second control valve 12 to open; when it is determined that there is a cooling demand based on the cooling demand information of the radiator 4, the third control valve 13 is controlled to be opened.
Specifically, as shown in fig. 5, the thermal management control module 30 may monitor the water temperature in real time based on the setting of the control module 8, collect a plurality of temperature signals, including the engine temperature sensor 16 integrated in the thermal management control module 30, the outlet temperature of the radiator 4, the outlet temperature of the air heater 5, the outlet temperature of the engine oil cooler 2 and the outlet temperature of the transmission oil cooler 6, synthesize the above temperature signals as input parameters of the control module 8, communicate with an ECU (Electronic Control Unit, an electronic control unit), a TCU (Transmi ssion Control Unit, an automatic transmission control unit) or an air conditioner controller in the vehicle, and collect the running state information of the whole vehicle to determine the current working condition of the engine, calculate the optimal working temperature of the engine at the control module 8, and take the temperature as the controlled target coolant temperature.
The target cooling liquid temperature can be set according to the following principle, when the engine is in low-speed and small-load, a higher target temperature is set, the working temperature at low speed and low-load is improved, and the oil consumption and emission are reduced; when the engine is at high speed and heavy load, a lower target temperature is set, so that the engine is at a lower working temperature, the occurrence of knocking is reduced, the performance of the engine is improved, and the torque output of the engine is increased. Further, whether to open the first control valve 11 is determined based on the received warm air demand information of the warm air blower 5, whether to open the second electromagnetic valve 12 is determined based on the received heating/cooling demand information of the transmission oil cooler 6, or whether to open the third electromagnetic valve 13 is determined based on the received cooling demand information of the radiator 4.
In some embodiments, the control unit 17 of the embodiment of the present invention is further configured to determine an operation condition of the engine according to the outlet temperature of the radiator 4, the outlet temperature of the heater 5, the outlet temperature of the engine oil cooler 2 and the outlet temperature of the transmission oil cooler 6, the outlet temperature of the engine, and the vehicle operation state information when controlling the valve on-off state of any one of the first control valve 11, the second control valve 12, and the third control valve 13, where the operation condition includes a warm-up condition, a warm-air condition, and a large-cycle condition, and further control the valve on-off state of any one of the first control valve 11, the second control valve 12, and the third control valve 13 according to the operation condition of the engine.
In some embodiments, when the control unit 17 of the embodiment of the present invention controls the valve opening and closing states of any one of the first control valve 11, the second control valve 12 and the third control valve 13 according to the operating condition of the engine, the control unit is used for controlling the first control valve 11, the second control valve 12 and the third control valve 13 to be closed during the warm-up condition, as shown in fig. 3, in the warm-up condition, the interfaces of the branch of the engine oil cooler 2 and the branch of the turbocharger 3 are always on, and the thermal management control module 30 sets all the control valves to be in the fully-closed state, so that most of the heat passes through the branch of the engine oil cooler 2 and absorbs the waste heat of the turbocharger 3, thereby reducing the heat loss of other pipelines, accelerating the increase of the oil temperature and the engine cylinder temperature, achieving the effect of rapid warm-up, and the rapid warm-up of the cooling liquid is formed by the engine water jacket 1, the thermal management control module 30, the turbocharger 3 and the engine oil cooler 2 under the action of the electronic pump 7.
Or, in the warm air working condition, the second control valve 12 and the third control valve 13 are controlled to be opened and the first control valve 11 is controlled to be closed, as shown in fig. 6, the second control valve 12 and the third control valve 13 are set to be opened by the thermal management control module 30, and the cooling liquid flows into the warm air device 5 and the gearbox oil cooler 6 under the control of the thermal management control module 30, so that the passenger cabin heating is realized, the oil temperature is quickly heated to the optimal temperature, and the lubrication of the gearbox is quickly established to achieve the purpose of saving oil.
Or, during the large circulation working condition, the first control valve 11, the second control valve 12 and the third control valve 13 are controlled to be opened, as shown in fig. 7, when the engine operates under the high load working condition, the thermal management control module 30 sets the first control valve 11, the second control valve 12 and the third control valve 13 to be opened, so that the cooling liquid in the integrated exhaust manifold of the engine cooling system can efficiently reduce the exhaust temperature, the exhaust gas flows to the turbine at a lower temperature, the turbocharger 3 is at a proper working temperature, and higher efficiency is realized, thereby achieving the energy saving effect.
In some embodiments, the control unit 17 of the embodiment of the present invention is further configured to calculate the opening of the control valve according to the heat exchange requirement information of the coolant circulation module 20 to control the opening of the corresponding control valve, obtain the target engine operating temperature according to the operating condition of the engine, and adjust the opening of the control valve according to the target engine operating temperature and the outlet temperature of the engine. For example, as shown in fig. 5, in which the control valve is a solenoid valve, the control unit 17 may intelligently calculate the coolant requirement and the flow of each branch when the engine is actually running from the temperature difference and heat exchange requirement information of each branch according to the principle of energy conservation, calculate the opening of the control valve by looking up a table such as a relation curve of the flow and the opening of the control valve in proportion to the flow, and output a channel signal to each control valve.
Therefore, according to the engine thermal management system 10 of the embodiment of the invention, based on the first control valve 11, the second control valve 12 and the third control valve 13 set by the thermal management control module 30, the temperature information, the heat exchange requirement information and the whole vehicle running state information of the cooling circulation module 20 are obtained through the control module 8, and the valve opening states of the first control valve 11, the second control valve 12 and the third control valve 13 are controlled according to the temperature information, the heat exchange requirement information and the whole vehicle running state information.
An embodiment of the second aspect of the present invention provides a method for engine thermal management, as shown in fig. 8, where the method for engine thermal management according to the embodiment of the present invention at least includes steps S1-S2.
And S1, acquiring temperature information and heat exchange demand information of the cooling circulation module and running state information of the whole vehicle.
In an embodiment, the method of the embodiment of the present invention is used in the engine thermal management system provided in the above embodiment, where the engine thermal management system includes a cooling liquid circulation module and a thermal management control module, and the control module set by the thermal management control module may obtain temperature information and heat exchange requirement information of the cooling circulation module and running state information of the whole vehicle.
In an embodiment, temperature sensors may be provided at corresponding positions of the cooling cycle module to acquire temperature information.
In an embodiment, the control module may monitor the water temperature in real time, collect a plurality of temperature signals, including an engine temperature sensor, a radiator outlet temperature, a heater outlet temperature, an engine oil cooler outlet temperature, and a transmission oil cooler outlet temperature, which are integrated in the thermal management control module, and integrate the above temperature signals as input parameters of the control module to communicate with an ECU (Electronic Control Unit, an electronic control unit), a TCU (Transmission Control Unit, a transmission control unit), or an air conditioner controller, etc. in the vehicle, so as to collect the running state information of the whole vehicle.
And step S2, controlling the first control valve, the second control valve and the third control valve according to the temperature information, the heat exchange demand information and the whole vehicle running state information.
In the embodiment, when the engine water jacket cooling system works, the engine water jacket cooling system is connected with a cooling liquid outlet of an engine water jacket through a thermal management control module, after cooling liquid enters the thermal management control module, the opening state of each control valve is controlled through the control module according to temperature information and heat exchange requirement information of a cooling circulation module and whole vehicle running state information based on the fact that the control module in the thermal management control module is respectively connected with a first control valve, a second control valve and a third control valve, the control module outputs opening control signals to the first control valve, the second control valve and the third control valve, and the first control valve, the second control valve and the third control valve feed back opening state signals to the control module, so that the purpose of controlling the water outlet state of each flow path is achieved. Compared with the existing engine cooling system, the embodiment of the invention is based on the integrated arrangement of the three control valves in the thermal management control module, so that the arrangement of a plurality of three-way valves, one-way valves, electromagnetic valves and other parts can be canceled, the high integration is realized, the cost of the parts is reduced, and whether the arrangement positions of the control valves and the pipelines interfere or not is not considered, thereby being beneficial to saving the space of a vehicle and optimizing the space arrangement of the whole vehicle.
According to the engine heat management method provided by the embodiment of the invention, based on the heat management control module arranged in the engine heat management system, the temperature information and the heat exchange demand information of the cooling circulation module and the whole vehicle running state information are obtained through the control module in the heat management control module, and the opening degrees of the first control valve, the second control valve and the third control valve are controlled according to the temperature information, the heat exchange demand information and the whole vehicle running state information.
In some embodiments, in the method of the embodiment of the present invention, for obtaining temperature information and heat exchange requirement information of the cooling cycle module and vehicle running state information, obtaining outlet temperature of the radiator, outlet temperature of the heater, outlet temperature of the engine oil cooler and outlet temperature of the transmission oil cooler, outlet temperature of the engine, and obtaining cooling requirement information of the radiator, warm air requirement information of the heater and heating/cooling requirement information of the transmission oil cooler, and obtaining vehicle running state information may be included.
In some embodiments, the method according to the embodiment of the present invention may further include controlling the valve on/off states of any one of the first control valve, the second control valve, and the third control valve according to the outlet temperature of the radiator, the outlet temperature of the heater, the outlet temperature of the engine oil cooler, and the outlet temperature of the transmission oil cooler, the outlet temperature of the engine, the cooling requirement information of the radiator, the heating requirement information of the heater, and the heating/cooling requirement information of the transmission oil cooler, and the vehicle operation state information. Therefore, through integrally controlling the opening degree of each control valve in the cooling liquid, the intelligent flow distribution of the cooling liquid can be realized, the accurate thermal management can be realized, the on-demand switching of the large circulation and the small circulation of the engine can be realized, the on-demand heating and cooling of the gearbox oil cooler can be realized, the on-demand supply of the warm air device branch and the warm air effect enhancement can be realized.
In some embodiments, in the method of the embodiment of the present invention, for controlling the valve on-off state of any one of the first control valve, the second control valve, and the third control valve according to the outlet temperature of the radiator, the outlet temperature of the heater, the outlet temperature of the engine oil cooler, and the outlet temperature of the transmission oil cooler, the outlet temperature of the engine, the cooling demand information of the radiator, the warm air demand information of the heater, and the heating/cooling demand information of the transmission oil cooler, and the vehicle operation state information, at least one of the following is performed: according to the warm air demand information of the warm air device, if the warm air demand is determined, the first control valve is controlled to be opened; the heating/cooling requirement is determined according to the heating/cooling requirement information of the gearbox oil cooler, and the second control valve is controlled to be opened; and if the cooling requirement is determined according to the cooling requirement information of the radiator, controlling the third control valve to be opened.
In some embodiments, in the method of the embodiment of the present invention, for controlling the valve on-off state of any one of the first control valve, the second control valve and the third control valve according to the outlet temperature of the radiator, the outlet temperature of the heater, the outlet temperature of the engine oil cooler and the outlet temperature of the transmission oil cooler, the outlet temperature of the engine, the cooling requirement information of the radiator, the warm air requirement information of the heater and the heating/cooling requirement information of the transmission oil cooler, and the whole vehicle operation state information, determining the operation condition of the engine according to the outlet temperature of the radiator, the outlet temperature of the heater, the outlet temperature of the engine oil cooler and the outlet temperature of the transmission oil cooler, the outlet temperature of the engine, and the whole vehicle operation state information, where the operation condition includes a warm-up condition, a warm air condition and a large circulation condition; and controlling the valve on-off state of any one of the first control valve, the second control valve and the third control valve according to the operating condition of the engine.
In some embodiments, in the method of the embodiment of the present invention, for controlling the valve opening and closing states of any one of the first control valve, the second control valve and the third control valve according to the operating condition of the engine, the method may include, during the warm-up condition, controlling the first control valve, the second control valve and the third control valve to be closed, so that most of heat passes through the engine oil cooler branch and absorbs waste heat of the turbocharger, thereby reducing heat loss of other pipelines, accelerating the increase of the oil temperature and the engine cylinder temperature, and achieving the effect of rapid warm-up; or when the warm air working condition is adopted, the second control valve and the third control valve are controlled to be opened and the first control valve is controlled to be closed, so that the cooling liquid flows into the warm air device and the gearbox oil cooler under the control of the thermal management control module, the passenger cabin is warmed, the oil temperature is quickly heated to the optimal temperature, and the gearbox is quickly lubricated to achieve the purpose of saving oil; or when the large circulation working condition is adopted, the first control valve, the second control valve and the third control valve are all controlled to be opened, so that the cooling liquid in the integrated exhaust manifold of the engine cooling system can efficiently reduce the exhaust temperature, the exhaust gas flows to the turbine at a lower temperature, the turbocharger is at a proper working temperature, and higher efficiency is realized, and the energy-saving effect is achieved.
In some embodiments, the engine thermal management method according to the embodiments of the present invention further includes calculating an opening degree of a control valve according to heat exchange demand information of a coolant circulation module to control the opening of the corresponding control valve; obtaining a target working temperature of the engine according to the operating condition of the engine; the opening degree of the control valve is adjusted according to the target engine operating temperature and the outlet temperature of the engine.
In some embodiments, in the method of the embodiments of the present invention, for obtaining the target operating temperature of the engine according to the operating condition where the engine is located, the method may include setting the target operating temperature of the engine to be the first temperature, where the rotational speed of the engine is less than the first rotational speed and the load is less than the first load; the rotational speed of the engine is greater than the second rotational speed and the load is greater than the second load, and the target operating temperature of the engine is set to a second temperature, wherein the second temperature is lower than the first temperature. That is, when the engine is at low speed and small load, a higher target temperature is set to improve the working temperature at low speed and low load and reduce oil consumption and emission; when the engine is at high speed and heavy load, a lower target temperature is set, so that the engine is at a lower working temperature, the occurrence of knocking is reduced, the performance of the engine is improved, and the torque output of the engine is increased.
An embodiment of the third aspect of the present invention provides a vehicle, as shown in fig. 9, the vehicle 100 of the embodiment of the present invention includes the engine 40 and the engine thermal management system 10 provided in the above-described embodiment.
According to the vehicle 100 of the embodiment of the invention, by adopting the engine thermal management system 10 provided by the embodiment, the accurate control of the temperature of the cooling liquid and the intelligent distribution of the flow of the cooling liquid can be realized, unnecessary flow and heat loss can be avoided, the energy utilization rate can be improved, the energy consumption can be reduced, the space arrangement of the whole vehicle can be optimized, and the cost can be reduced.
In the description of this specification, any process or method description in a flowchart or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing logical functions or steps of the process, and in which the scope of the preferred embodiments of the present invention include additional implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As with the other embodiments, if implemented in hardware, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (9)

1. An engine thermal management system, comprising:
the cooling liquid circulation module comprises an engine water jacket, an engine oil cooler, a turbocharger, a radiator, a warm air blower, a gearbox oil cooler and an electronic pump, wherein a cooling liquid inlet of the turbocharger, a cooling liquid inlet of the engine oil cooler, a cooling liquid inlet of the radiator, a cooling liquid inlet of the warm air blower and a cooling liquid inlet of the gearbox oil cooler are communicated with a cooling liquid outlet of the engine water jacket, a cooling liquid inlet of the electronic pump is communicated with a cooling liquid outlet of the turbocharger, a cooling liquid outlet of the engine oil cooler, a cooling liquid outlet of the radiator, a cooling liquid outlet of the warm air blower and a cooling liquid outlet of the gearbox oil cooler, and a cooling liquid outlet of the electronic pump is connected with a cooling liquid backflow port of the engine water jacket;
the heat management control module comprises a control module, a first control valve, a second control valve and a third control valve, wherein the first control valve is arranged on a connecting pipeline of a cooling liquid inlet of the heater and a cooling liquid outlet of the engine water jacket, the second control valve is arranged on a connecting pipeline of a cooling liquid inlet of the gearbox oil cooler and a cooling liquid outlet of the engine water jacket, and the third control valve is arranged on a connecting pipeline of a cooling liquid inlet of the radiator and a cooling liquid outlet of the engine water jacket;
The control module is respectively connected with the first control valve, the second control valve and the third control valve, and is used for acquiring temperature information and heat exchange requirement information of the cooling liquid circulation module and whole vehicle running state information, and controlling the first control valve, the second control valve and the third control valve according to the temperature information, the heat exchange requirement information and the whole vehicle running state information;
the control module includes:
the data receiving unit is used for receiving the outlet temperature of the radiator, the outlet temperature of the heater, the outlet temperature of the engine oil cooler and the outlet temperature of the gearbox oil cooler, cooling requirement information of the radiator, warm air requirement information of the heater and heating/cooling requirement information of the gearbox oil cooler and running state information of the whole vehicle;
an engine temperature sensor for acquiring an outlet temperature of the engine;
a control unit, connected to the data receiving unit and the engine temperature sensor, respectively, for controlling a valve on-off state of any one of the first control valve, the second control valve, and the third control valve according to an outlet temperature of the radiator, an outlet temperature of the heater, an outlet temperature of the engine oil cooler, an outlet temperature of the transmission oil cooler, an outlet temperature of the engine, cooling demand information of the radiator, warm air demand information of the heater, and heating/cooling demand information of the transmission oil cooler, and the vehicle operation state information;
Wherein the control unit is further configured to, when controlling a valve on-off state of any one of the first control valve, the second control valve, and the third control valve,
determining an operation condition of the engine according to the outlet temperature of the radiator, the outlet temperature of the heater, the outlet temperature of the engine oil cooler, the outlet temperature of the gearbox oil cooler, the outlet temperature of the engine and the whole vehicle operation state information, wherein the operation condition comprises a warm-up condition, a warm-air condition and a large circulation condition;
controlling the valve on-off state of any one of the first control valve, the second control valve and the third control valve according to the operation condition of the engine;
the control unit is further used for calculating the opening degrees of the first control valve, the second control valve and the third control valve according to the heat exchange demand information of the cooling liquid circulation module so as to control the corresponding control valves to be opened, obtaining an engine target working temperature according to the running working condition of the engine, and adjusting the opening degrees of the first control valve, the second control valve and the third control valve according to the engine target working temperature and the outlet temperature of the engine.
2. The engine thermal management system of claim 1, wherein the coolant circulation module further comprises:
the first input end of the three-way valve is connected with the cooling liquid outlet of the heater, the second input end of the three-way valve is connected with the cooling liquid outlet of the gearbox oil cooler, and the output end of the three-way valve is connected with the cooling liquid inlet of the electronic pump.
3. The engine heat management system according to claim 1, wherein the control unit, when controlling a valve on-off state of any one of the first control valve, the second control valve, and the third control valve, is configured to perform at least one of:
according to the warm air demand information of the warm air device, if the warm air demand is determined, the first control valve is controlled to be opened;
the heating/cooling requirement is determined according to the heating/cooling requirement information of the gearbox oil cooler, and the second control valve is controlled to be opened;
and if the cooling requirement is determined according to the cooling requirement information of the radiator, controlling the third control valve to be opened.
4. The engine heat management system according to claim 1, wherein the control unit is configured to control, when controlling a valve-on/off state of any one of the first control valve, the second control valve, and the third control valve in accordance with an operation condition in which the engine is located, to control, when in the warm-up condition, the first control valve, the second control valve, and the third control valve to be closed, or to control, when in the warm-air condition, the second control valve and the first control valve to be opened and the third control valve to be closed, or to control, when in the large-cycle condition, the first control valve, the second control valve, and the third control valve to be opened.
5. An engine thermal management method for an engine thermal management system of any one of claims 1-4, the engine thermal management method comprising:
acquiring temperature information and heat exchange demand information of the cooling liquid circulation module and whole vehicle running state information;
the first control valve, the second control valve and the third control valve are controlled according to the temperature information, the heat exchange demand information and the whole vehicle running state information;
the method for acquiring the temperature information and the heat exchange demand information of the cooling liquid circulation module and the running state information of the whole vehicle comprises the following steps:
acquiring outlet temperature of a radiator, outlet temperature of a warm air device, outlet temperature of an engine oil cooler, outlet temperature of a gearbox oil cooler and outlet temperature of an engine, cooling requirement information of the radiator, warm air requirement information of the warm air device, heating/cooling requirement information of the gearbox oil cooler and whole vehicle running state information;
the first control valve, the second control valve and the third control valve are controlled according to the temperature information, the heat exchange demand information and the whole vehicle running state information, and the method comprises the following steps:
Determining an operation condition of the engine according to the outlet temperature of the radiator, the outlet temperature of the heater, the outlet temperature of the engine oil cooler, the outlet temperature of the gearbox oil cooler, the outlet temperature of the engine and the whole vehicle operation state information, wherein the operation condition comprises a warm-up condition, a warm-air condition and a large circulation condition;
controlling the valve on-off state of any one of the first control valve, the second control valve and the third control valve according to the operation condition of the engine;
calculating the opening degrees of the first control valve, the second control valve and the third control valve according to the heat exchange demand information of the cooling liquid circulation module so as to control the opening of the corresponding control valves; and
obtaining a target working temperature of the engine according to the operating condition of the engine;
and adjusting the opening degrees of the first control valve, the second control valve and the third control valve according to the target working temperature of the engine and the outlet temperature of the engine.
6. The engine thermal management method according to claim 5, wherein controlling the valve-on and off states of any one of the first control valve, the second control valve, and the third control valve according to the outlet temperature of the radiator, the outlet temperature of the warm air heater, the outlet temperature of the engine oil cooler, and the outlet temperature of the transmission oil cooler, the outlet temperature of the engine, the cooling demand information of the radiator, the warm air demand information of the warm air heater, and the heating/cooling demand information of the transmission oil cooler, and the vehicle operation state information includes performing at least one of:
According to the warm air demand information of the warm air device, if the warm air demand is determined, the first control valve is controlled to be opened;
the heating/cooling requirement is determined according to the heating/cooling requirement information of the gearbox oil cooler, and the second control valve is controlled to be opened;
and if the cooling requirement is determined according to the cooling requirement information of the radiator, controlling the third control valve to be opened.
7. The engine thermal management method according to claim 5, wherein controlling a valve on-off state of any one of the first control valve, the second control valve, and the third control valve according to an operating condition in which the engine is located, comprises:
when the heating working condition is met, the first control valve, the second control valve and the third control valve are controlled to be closed;
or when the warm air working condition is met, the second control valve and the first control valve are controlled to be opened, and the third control valve is controlled to be closed;
or, during the large circulation condition, the first control valve, the second control valve and the third control valve are all controlled to be opened.
8. The engine thermal management method of claim 5, wherein obtaining an engine target operating temperature based on an operating condition of the engine comprises:
The rotating speed of the engine is smaller than the first rotating speed, the load is smaller than the first load, and the target working temperature of the engine is set to be a first temperature;
the rotating speed of the engine is larger than the second rotating speed and the load is larger than the second load, and the target working temperature of the engine is set to be a second temperature, wherein the second temperature is lower than the first temperature.
9. A vehicle comprising an engine and the engine thermal management system of any one of claims 1-4.
CN202010819747.5A 2020-08-14 2020-08-14 Engine heat management system, engine heat management method and vehicle Active CN114076023B (en)

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