CN114076023A - Engine thermal management system, engine thermal management method and vehicle - Google Patents

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

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Publication number
CN114076023A
CN114076023A CN202010819747.5A CN202010819747A CN114076023A CN 114076023 A CN114076023 A CN 114076023A CN 202010819747 A CN202010819747 A CN 202010819747A CN 114076023 A CN114076023 A CN 114076023A
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China
Prior art keywords
control valve
engine
temperature
oil cooler
outlet temperature
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Granted
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CN202010819747.5A
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Chinese (zh)
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CN114076023B (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 cooling liquid circulating module comprises an engine oil cooler, a radiator, a fan 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 connected with the first control valve, the second control valve and the third control valve respectively, is used for acquiring the temperature information, the heat exchange demand information and the whole vehicle running state information of the cooling circulation module, and controls 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 heat management system can realize accurate control of the flow of the cooling liquid and reduce the cost.

Description

Engine thermal management system, engine thermal management method and vehicle
Technical Field
The invention relates to the technical field of vehicles, in particular to an engine thermal management system, an engine thermal management method and a vehicle.
Background
With the coming of new vehicle energy consumption and emission regulations, the national requirements on the vehicle energy consumption and emission are stricter and stricter, the requirement on heat management of the vehicle is higher and higher, the past heat management concept of only carrying out rough cooling on each subsystem and a gearbox of an engine cannot meet the requirements of new policy and regulations and vehicle technical conditions, and an engine heat management system has great influence on the fuel economy and the driving reliability of a finished vehicle and even the emission.
In the related art, an engine cooling system disclosed in patent publication No. CN108979826A is generally used, and the engine cooling system forms four closed cooling circuits, i.e., a supercharger cooling circuit, a warm air circuit, a main circulation circuit, and an oil cooler circuit, by using functional components, three-way valves, check valves, and pipe connections. However, the engine cooling system has complex pipelines, each circulating pipeline is provided with more parts such as an electromagnetic valve, a three-way valve, a one-way valve, a water valve and a sensor, the space of the whole engine room is limited, the engine room is difficult to arrange, the arrangement cost is high, each type of control valve has a single function, and accurate distribution of the flow of the cooling liquid and accurate control of the temperature of the cooling liquid cannot be realized.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, one object of the present invention is to provide an engine thermal management system, which can realize precise control of the coolant flow and reduce the cost.
The invention also aims to provide an engine thermal management method.
The invention also aims to provide a vehicle.
In order to solve the above problem, an embodiment of the 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 fan heater, 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 fan heater and a cooling liquid inlet of the gearbox oil cooler are all communicated with a cooling liquid outlet of the engine water jacket, a cooling liquid inlet of the electronic pump is respectively connected 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 fan heater 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 return 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 between a coolant inlet of the air heater and a coolant outlet of the engine water jacket, the second control valve is arranged on a connecting pipeline between a coolant inlet of the gearbox oil cooler and a coolant outlet of the engine water jacket, and the third control valve is arranged on a connecting pipeline between a coolant inlet of the radiator and a coolant outlet of the engine water jacket; the control module is connected with the first control valve, the second control valve and the third control valve respectively, is used for acquiring the temperature information, the heat exchange demand information and the whole vehicle running state information of the cooling circulation module, and controls 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 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 in the heat management control module, the temperature information and the heat exchange requirement information of the cooling circulation module and the running state information of the whole vehicle are obtained through 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 running state information of the whole vehicle, namely, the embodiment of the invention comprehensively considers the states of a supercharging system, an air intake and exhaust system, a cooling system and a lubricating system of the engine from the whole situation of the system and controls the flow of cooling liquid of each flow path, so that the aim of accurately controlling the flow of the cooling liquid can be realized, and 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 heat management control module, thereby can cancel the setting of spare part such as a plurality of three-way valves, check valve, solenoid valve, realize high integration, reduce spare part cost, also need not to consider whether each control valve and pipeline arrangement position interfere, do benefit to and save vehicle space, optimize the spatial arrangement of whole car.
In some embodiments, the cooling fluid circulation module further comprises: the first input of three-way valve with the coolant liquid exit linkage of air heater, the second input of three-way valve with the coolant liquid exit linkage of gearbox oil cooler, the output of three-way valve with the coolant liquid exit linkage of electron pump.
In some embodiments, the control module comprises: the data receiving unit is used for receiving the outlet temperature of the radiator, the outlet temperature of the air heater, the outlet temperature of the engine oil cooler and the outlet temperature of the gearbox oil cooler, receiving cooling demand information of the radiator, the air heater demand information and the heating/cooling demand information of the gearbox oil cooler, and receiving running state information of the whole vehicle; an engine temperature sensor for acquiring an outlet temperature of the engine; the control unit, with the data receiving unit with engine temperature sensor connects respectively, is used for the basis according to the outlet temperature of radiator the outlet temperature of fan heater the outlet temperature of engine oil cooler with the outlet temperature of gearbox oil cooler the outlet temperature of engine the cooling demand information of radiator the fan heater the heating demand information with the heating/cooling demand information of gearbox oil cooler and whole car running state information control first control valve the second control valve with the valve on-off state of any one in the third control valve.
In some embodiments, the control unit, when controlling the valve open/close 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: if the warm air demand is determined according to the warm air demand information of the warm air device, controlling the first control valve to be opened; determining that a heating/cooling demand exists according to the heating/cooling demand information of the gearbox oil cooler, and controlling the second control valve to be opened; and if the cooling demand is determined according to the cooling demand information of the radiator, controlling the third control valve to be opened.
In some embodiments, when controlling the valve switching state of any one of the first control valve, the second control valve and the third control valve, 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 air heater, an outlet temperature of the engine oil cooler, an outlet temperature of the transmission oil cooler, an outlet temperature of the engine, and the 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 opening and closing 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, when controlling a valve open/close state of any one of the first control valve, the second control valve, and the third control valve according to an operating condition of the engine, control the first control valve, the second control valve, and the third control valve to be closed in the warm-up condition, or control the second control valve and the third control valve to be opened and control the first control valve to be closed in the warm-air condition, or control the first control valve, the second control valve, and the third control valve to be opened in the large-cycle condition.
In some embodiments, the control unit is further configured to calculate an opening degree of a control valve according to the heat exchange demand information of the coolant circulation module to control the corresponding control valve to open, obtain a target operating temperature of the engine according to the operating condition of the engine, and adjust the opening degree of the control valve according to the target operating temperature of the engine and the outlet temperature of the engine.
In a second aspect of the present invention, there is provided an engine thermal management method for an engine thermal management system according to the above embodiment, where the engine thermal management method includes: acquiring temperature information and heat exchange demand information of the cooling circulation module and running state information of the whole vehicle; 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.
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 requirement information of the cooling circulation module and the running state information of the whole vehicle 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 requirement information and the running state information of the whole vehicle.
In some embodiments, acquiring the temperature information and the heat exchange demand information of the cooling cycle module and the running state information of the whole vehicle includes: the method comprises the steps of obtaining the outlet temperature of a radiator, the outlet temperature of a fan heater, the outlet temperature of an engine oil cooler, the outlet temperature of a gearbox oil cooler and the outlet temperature of an engine, obtaining cooling demand information of the radiator, the fan heater demand information and the heating/cooling demand 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 demand information, and the vehicle running state information includes: according to the exit temperature of radiator the exit temperature of air heater the exit temperature of engine oil cooler with the exit temperature of gearbox oil cooler the exit temperature of engine the cooling demand information of radiator the warm braw demand information of air heater with the heating/cooling demand information of gearbox oil cooler and whole car running state information control first control valve the second control valve with the valve on-off state of any one in the third control valve.
In some embodiments, controlling a valve open/close 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 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 heating demand information of the air heater, and the heating/cooling demand information of the transmission oil cooler, and the vehicle running state information includes performing at least one of: if the warm air demand is determined according to the warm air demand information of the warm air device, controlling the first control valve to be opened; determining that a heating/cooling demand exists according to the heating/cooling demand information of the gearbox oil cooler, and controlling the second control valve to be opened; and if the cooling demand is determined according to the cooling demand information of the radiator, controlling the third control valve to be opened.
In some embodiments, controlling a valve open/close 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 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 heating demand information of the air heater, and the heating/cooling demand information of the transmission oil cooler, and the vehicle running state information, further includes: determining the operating conditions of the engine according to the outlet temperature of the radiator, the outlet temperature of the air 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 running state information of the whole vehicle, wherein the operating conditions comprise a warming-up condition, a warm air condition and a large circulation condition; and 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 the operation condition of the engine.
In some embodiments, controlling the valve open/close 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 includes: controlling the first control valve, the second control valve and the third control valve to be closed under the warming working condition; or, when the hot air is in the working condition, 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, when the large circulation working condition exists, the first control valve, the second control valve and the third control valve are controlled to be opened.
In some embodiments, the engine thermal management method further comprises: calculating the opening of the control valve according to the heat exchange demand information of the cooling liquid circulation module so as to control the corresponding control valve to be opened; obtaining a target working temperature of the engine according to the working condition of the engine; and adjusting the opening of the control valve according to the target working temperature of the engine and the outlet temperature of the engine.
In some embodiments, obtaining the target engine operating temperature based on operating conditions in which the engine is operating comprises: setting the target working temperature of the engine to be a first temperature when the rotating speed of the engine is less than a first rotating speed and the load is less than a first load; the rotating speed of the engine is larger than a second rotating speed, the load is larger than a 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.
In a third aspect, embodiments of the invention provide a vehicle including an engine and an engine thermal management system as described in the previous embodiments.
According to the vehicle provided by the embodiment of the invention, by adopting the engine heat management system 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 is improved, the energy consumption is reduced, the spatial 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 above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a block diagram of an engine thermal management system according to an embodiment of the present invention;
FIG. 2 is a block diagram of an engine thermal management system according to another embodiment of the present invention;
FIG. 3 is a functional schematic of a warm-up condition according to an embodiment of the present invention;
FIG. 4 is a block diagram of a control module according to one embodiment of the present invention;
FIG. 5 is a strategy control diagram of a control module according to one embodiment of the invention;
FIG. 6 is a functional schematic of a warm air condition according to one embodiment of the present invention;
FIG. 7 is a functional schematic under 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 present 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 heat sink 4; a fan 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, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
In order to solve the above problem, an engine thermal management system according to an embodiment of the first aspect of the present invention, which can achieve precise control of the coolant flow and reduce the cost, is described below with reference to the 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 air heater 5 and the cooling liquid inlet of the gearbox oil cooler 6 are 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 air 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 return 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 figure), 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 pipe between a coolant inlet of the air heater 5 and a coolant outlet of the engine water jacket 1, the second control valve 12 is provided on a connection pipe between 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 pipe between a coolant inlet of the radiator 4 and a coolant outlet of the engine water jacket 1. And the control module 8 is connected with the first control valve 11, the second control valve 12 and the third control valve 13 respectively, and is configured to acquire the temperature information and the heat exchange demand information of the cooling circulation module 20 and the running state information of the entire vehicle, and control the first control valve 11, the second control valve 12 and the third control valve 13 according to the temperature information, the heat exchange demand information and the running state information of the entire vehicle.
Specifically, during operation, the thermal management control module 30 is connected with a coolant outlet of the engine water jacket 1, after coolant enters the thermal management control module 30, the control module 8 in the thermal management control module 30 is respectively connected with the first control valve 11, the second control valve 12 and the third control valve 13, and the control module 30 controls the valve opening state of each control valve 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, 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 the opening state signals to the control module 30 through the first control valve 11, the second control valve 12 and the third control valve 13, so as to achieve the purpose of controlling the water outlet state of each flow path And the states of the air intake and exhaust system, the cooling system and the lubricating system control the flow of the cooling liquid for each flow path, so that the aim of accurately controlling the flow of the cooling liquid is fulfilled.
In the embodiment, as shown in fig. 2, the thermal management control module 30 is disposed at the position of an engine water outlet, and integrates a plurality of cavities for collecting the coolant respectively from the engine water jacket 1, and then the coolant is distributed through a plurality of flow channels and respectively flows into the engine oil cooler 2, the turbocharger 3, the transmission oil cooler 6, the radiator 4, the air heater 5 and other components, wherein the branch leading to the engine oil cooler 2 and the branch leading to the turbocharger 3 are not controlled by the thermal management control module 30 and are in a normal-flow state, which is more beneficial to quickly warm up the engine than the small-circulation pipeline of the existing engine cooling system, and the first control valve 11 is used for controlling the coolant to flow from the engine water jacket 1 to the large-circulation branch, the second control valve 12 is used for controlling the coolant to flow from the engine water jacket 1 to the transmission oil cooler 6 branch, the third control valve 13 is used for controlling the coolant to flow from the engine water jacket 1 to the air conditioner air heater 5 branch, the control module 30 can simultaneously control the opening and closing of each valve and the opening degree, so that the accurate control of the flow of the cooling liquid is realized, and compared with the existing engine cooling system, the embodiment of the invention can cancel the arrangement of a plurality of three-way valves, one-way valves, electromagnetic valves and other parts by the integration mode of three control valves in the heat management control module 30, thereby realizing high integration, reducing the cost of the parts, avoiding the consideration of the interference between each control valve and the pipeline arrangement position, being beneficial to saving the space of the vehicle and optimizing the space arrangement of the whole vehicle.
In an embodiment, the control valve may be an electromagnetic valve, and the electromagnetic valve is controlled by the control module 30, so that on/off of each pipeline can be controlled, and the flow of the cooling liquid can be adjusted.
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 which are arranged in the thermal management control module 30, the temperature information and the heat exchange demand information of the cooling circulation module 20 and the running state information of the whole vehicle 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 demand information and the running state information of the whole vehicle, that is, the embodiment of the invention starts from the whole situation of the system, comprehensively considers the states of a supercharging system, an air intake and exhaust system, a cooling system and a lubricating system of the engine, and controls the flow rate of cooling liquid of each flow path, so that the purpose of accurately controlling the flow rate of the cooling liquid can be realized, 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 30, thereby can cancel the setting of spare part such as a plurality of three-way valves, check valve, solenoid valve, realize high integration, reduce spare part cost, also need not to consider whether each control valve and pipeline arrangement position interfere, do benefit to and save vehicle space, optimize the spatial arrangement of whole car.
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 transmission 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 embodiments 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 air heater 5, the outlet temperature of the engine oil cooler 2, and the outlet temperature of the transmission oil cooler 6, and receive cooling demand information of the radiator 4, the heating demand information of the air heater 5, and heating/cooling demand information of the transmission oil cooler 6, and receive running state information of the entire vehicle; 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, and is configured to control a valve open/close 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 air heater 5, the outlet temperature of the engine oil cooler 2, the outlet temperature of the transmission oil cooler 6, the outlet temperature of the engine, the cooling demand information of the radiator 4, the heating demand information of the air heater 5, the heating/cooling demand information of the transmission oil cooler 6, and the vehicle running state information.
That is, the Control module 8 includes a data receiving Unit 15, an engine temperature sensor 16, and a Control Unit 17, and determines whether the temperature exceeds a certain set value by combining a Control strategy, and then, in combination with the requirements of an ECU (Electronic Control Unit) inside the vehicle, a TCU (transmission Control Unit), and an air conditioner controller, performs flow intelligent distribution on the coolant by integrally controlling the opening of each Control valve inside, so as to realize accurate thermal management, and realize on-demand switching of the large circulation and the small circulation of the engine, and realize on-demand heating and cooling of the transmission oil cooler 6, and realize on-demand supply of hot air in the branch of the air heater 5 and enhancement of the hot air effect.
In some embodiments, the control unit 17 of the embodiment of the present invention is configured to, when controlling the valve opening and closing state of any one of the first control valve 11, the second control valve 12, and the third control valve 13, perform at least one of: if the warm air demand is determined according to the warm air demand information of the warm air device 5, controlling the first control valve 11 to be opened; if the heating/cooling requirement is determined according to the heating/cooling requirement information of the gearbox oil cooler 6, the second control valve 12 is controlled to be opened; the third control valve 13 is controlled to open if it is determined that there is a cooling demand based on the cooling demand information of the radiator 4.
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, include an engine temperature sensor 16, an outlet temperature of the radiator 4, an outlet temperature of the air heater 5, an outlet temperature of the engine oil cooler 2, and an outlet temperature of the transmission oil cooler 6, which are integrated in the thermal management Control module 30, and integrate the temperature signals as input parameters of the Control module 8, and communicate with an ECU (Electronic Control Unit), a TCU (transmission Control Unit), or an air conditioner controller inside the vehicle, so as to collect the vehicle running state information to determine the current working condition of the engine, calculate the optimal working temperature of the engine at the Control module 8, and use the temperature as a controlled target cooling liquid temperature.
The target coolant temperature can be set according to the following principle, when the engine is at low speed and low load, a higher target temperature is set, the working temperature at low speed and low load is increased, and the oil consumption and the emission are reduced; when the engine is in high speed and heavy load, a lower target temperature is set, so that the engine is in 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, it is determined whether to open the first control valve 11 according to the received warm air demand information of the warm air blower 5, or to open the second electromagnetic valve 12 according to the received heating/cooling demand information of the transmission oil cooler 6, or to open the third electromagnetic valve 13 according to the received cooling demand information of the radiator 4.
In some embodiments, the control unit 17 according to the embodiments of the present invention, when controlling the valve open-close state of any one of the first control valve 11, the second control valve 12 and the third control valve 13, 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 air heater 5, the outlet temperature of the engine oil cooler 2, the outlet temperature of the transmission oil cooler 6, the outlet temperature of the engine, and the vehicle operation state information, where the operation condition includes a warm-up condition, a warm-air condition and a large-cycle condition, and further control the valve open-close 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, the control unit 17 of the embodiment of the present invention is configured to, when controlling the valve open/close state 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, control the first control valve 11, the second control valve 12 and the third control valve 13 to be closed in the warm-up condition, as shown in fig. 3, in the warm-up condition, the interfaces of the engine oil cooler 2 branch and the turbocharger 3 branch are open, and the thermal management control module 30 sets all the control valves to be in the fully-closed state, so that most of heat passes through the engine oil cooler 2 branch and simultaneously absorbs waste heat of the turbocharger 3, thereby reducing heat loss of other pipelines, accelerating to raise the oil temperature and the engine block temperature, and achieving the effect of rapid warm-up, and under the action of the electronic pump 7, the coolant passes through the engine water jacket 1, the thermal management control module 30, The turbocharger 3 and the engine oil cooler 2 form a small quick warm-up cycle.
Or, when the hot air is in a 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 thermal management control module 30 is provided with the second control valve 12 and the third control valve 13 to be opened, and the cooling liquid flows into the air heater 5 and the transmission oil cooler 6 under the control of the thermal management control module 30, so that the passenger compartment is heated, the oil temperature is rapidly heated to an optimal temperature, and the transmission is rapidly lubricated to achieve the purpose of saving oil.
Or, in a large-cycle operating 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 in a high-load operating 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 achieved, thereby achieving the effect of saving energy.
In some embodiments, the control unit 17 of the embodiment of the present invention is further configured to calculate the opening degree of the control valve according to the heat exchange requirement information of the coolant circulation module 20 to control the corresponding control valve to open, obtain the target operating temperature of the engine according to the operating condition of the engine, and adjust the opening degree of the control valve according to the target operating temperature of the engine and the outlet temperature of the engine. For example, as shown in fig. 5, where the control valve is an electromagnetic valve, the control unit 17 can intelligently calculate the coolant requirement and the flow rate of each branch from the temperature difference and the heat exchange requirement information of each branch according to the principle of energy conservation when the engine is actually operated, calculate the opening of the control valve from the opening ratio of the control valve in direct proportion to the flow rate, look up a table such as a relation curve between the flow rate and the opening of the control valve, and output a channel signal to each control valve.
Therefore, according to the engine thermal management system 10 of the embodiment of the present invention, based on the first control valve 11, the second control valve 12 and the third control valve 13 arranged in the thermal management control module 30, the control module 8 obtains the temperature information and the heat exchange demand information of the cooling cycle module 20 and the vehicle running state information, and controls the valve opening states of the first control valve 11, the second control valve 12 and the third control valve 13 according to the temperature information, the heat exchange demand information and the vehicle running state information, that is, the embodiment of the present invention starts from the global system, comprehensively considers the states of the supercharging system, the air intake and exhaust system, the cooling system and the lubrication system of the engine, and controls the flow rate of the cooling fluid in each flow path, so as to achieve the precise control of the temperature of the cooling fluid and the intelligent distribution of the flow rate of the cooling fluid, and compared with the existing engine cooling system, in the embodiment of the present invention, through the integrated arrangement of the three control valves in the thermal management control module 30, the invention can cancel the arrangement of a plurality of three-way valves, one-way valves, electromagnetic valves and other parts, realize high integration, reduce the cost of the parts, avoid considering whether the arrangement positions of all control valves and pipelines interfere, is beneficial to saving the space of a vehicle, optimize the space arrangement of the whole vehicle, and compared with the existing engine cooling system.
In a second aspect of the present invention, an embodiment of the present invention provides a method for thermal management of an engine, as shown in fig. 8, the method for thermal management of an engine according to the embodiment of the present invention at least includes steps S1-S2.
And step S1, acquiring the temperature information and the heat exchange requirement information of the cooling circulation module and the running state information of the whole vehicle.
In an embodiment, the method provided by the embodiment of the invention is used for the engine thermal management system provided by the embodiment, wherein the engine thermal management system comprises a cooling liquid circulation module and a thermal management control module, and the control module arranged by the thermal management control module can acquire the temperature information and the heat exchange requirement information of the cooling circulation module and the 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, include an engine temperature sensor embedded in the thermal management Control module, an outlet temperature of a radiator, an outlet temperature of a heater, an outlet temperature of an engine oil cooler, and an outlet temperature of a Transmission oil cooler, synthesize the above temperature signals as input parameters of the Control module, and communicate with an ECU (Electronic Control Unit), a TCU (Transmission Control Unit), or an air conditioner controller inside the vehicle to collect the running state information of the entire 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 requirement information and the running state information of the whole vehicle.
In the embodiment, during operation, the heat management control module is connected with a coolant outlet of an engine water jacket, after coolant enters the heat management control module, the control module in the heat management control module is respectively connected with the first control valve, the second control valve and the third control valve, the control module controls the valve opening state of each control valve according to temperature information and heat exchange requirement information of the cooling circulation module and running state information of a whole vehicle, the control module outputs opening degree 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 the opening degree state signals to the control module, so that the purpose of controlling the water outlet state of each flow path is achieved, namely the embodiment of the invention comprehensively considers the states of a supercharging system, an air inlet and outlet system, a cooling system and a lubricating system of the engine from the whole system, and the flow of the cooling liquid is controlled for each flow path, so that the aim of accurately controlling the flow of the cooling liquid is fulfilled. Compared with the existing engine cooling system, the heat management control module is based on the integrated arrangement of the three control valves in the heat management control module, so that the arrangement of a plurality of three-way valves, one-way valves, electromagnetic valves and other parts can be omitted, high integration is realized, the cost of the parts is reduced, whether the arrangement positions of the control valves and pipelines are interfered or not is not required to be considered, the space of a vehicle is saved, and the space arrangement of the whole vehicle is optimized.
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 requirement information of the cooling circulation module and the running state information of the whole vehicle 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 requirement information and the running state information of the whole vehicle.
In some embodiments, the method according to the embodiments of the present invention may include, for obtaining the temperature information and the heat exchange demand information of the cooling cycle module and the running state information of the entire vehicle, obtaining an outlet temperature of the radiator, an outlet temperature of the air heater, an outlet temperature of the engine oil cooler, an outlet temperature of the transmission oil cooler, and an outlet temperature of the engine, obtaining the cooling demand information of the radiator, the warm air demand information of the air heater, and the heating/cooling demand information of the transmission oil cooler, and obtaining the running state information of the entire vehicle.
In some embodiments, the method according to the embodiments of the present invention, for 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 running state information, may include controlling a 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 outlet temperature of a radiator, an outlet temperature of a heater, an outlet temperature of an engine oil cooler and an outlet temperature of a transmission oil cooler, an outlet temperature of an engine, cooling requirement information of the radiator, heating requirement information of the heater and heating/cooling requirement information of the transmission oil cooler and the vehicle running state information. Thereby through the aperture of each inside control valve of overall control, carry out flow intelligent distribution with the coolant liquid, can realize accurate thermal management to and can realize the on-demand switching of engine major cycle and minor cycle, and can realize heating and cooling as required of gearbox oil cooler, and can realize the on-demand supply and the reinforcing warm braw effect of warm braw of air heater branch road warm braw.
In some embodiments, the method of an embodiment of the present invention, wherein 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 the outlet temperature of the radiator, the outlet temperature of the air heater, the outlet temperature of the engine oil cooler, the outlet temperature of the transmission oil cooler, the outlet temperature of the engine, the cooling demand information of the radiator, the heating demand information of the air heater, the heating/cooling demand information of the transmission oil cooler, and the vehicle running state information includes performing at least one of: if the warm air demand is determined according to the warm air demand information of the warm air device, controlling the first control valve to be opened; determining that a heating/cooling demand exists according to the heating/cooling demand information of the gearbox oil cooler, and controlling a second control valve to be opened; and if the cooling demand is determined according to the cooling demand information of the radiator, controlling the third control valve to be opened.
In some embodiments, the method of the embodiments of the present invention further includes controlling a valve opening/closing state of any one of the first control valve, the second control valve and the third control valve according to an outlet temperature of a radiator, an outlet temperature of a fan heater, an outlet temperature of an engine oil cooler and an outlet temperature of a transmission oil cooler, an outlet temperature of an engine, cooling demand information of the radiator, heating demand information of the fan heater and heating/cooling demand information of the transmission oil cooler and vehicle running state information, determining the operation conditions of the engine according to the outlet temperature of the radiator, the outlet temperature of the air 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 running state information of the whole vehicle, wherein the operation conditions comprise a warming-up condition, a warm air condition and a large circulation condition; and 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 the operation condition of the engine.
In some embodiments, in the method according to the embodiments of the present invention, for controlling the valve open/close 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, 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 oil cooler branch of the engine, and simultaneously, waste heat of the turbocharger is absorbed, thereby reducing heat loss of other pipelines, accelerating to raise the oil temperature and the temperature of the engine cylinder, and achieving the effect of rapid warm-up; or when the air heating 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, so that cooling liquid flows into the air heater and the oil cooler of the gearbox under the control of the thermal management control module, the passenger compartment is heated, 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 engine cooling system is in a large circulation working condition, the first control valve, the second control valve and the third control valve are 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, the 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 the opening degree of the control valve according to the heat exchange demand information of the coolant circulation module to control the corresponding control valve to open; obtaining the 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 working temperature of the engine and the outlet temperature of the engine.
In some embodiments, the method of the embodiments of the present invention may include, for obtaining the target operating temperature of the engine according to the operating condition of the engine, setting the target operating temperature of the engine to be the first temperature, where a rotation speed of the engine is less than a first rotation speed and a load is less than a first load; the rotating speed of the engine is greater than the second rotating speed, the load is greater than the second load, and the target working temperature of the engine is set to be the second temperature, wherein the second temperature is lower than the first temperature. That is, when the engine is in low speed and low load, a higher target temperature is set to improve the working temperature in low speed and low load, and reduce oil consumption and emission; when the engine is in high speed and heavy load, a lower target temperature is set, so that the engine is in 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.
In a third aspect of the present invention, a vehicle 100 according to an embodiment of the present invention includes an engine 40 and the engine thermal management system 10 according to the above embodiment, as shown in fig. 9.
According to the vehicle 100 provided by 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 is improved, the energy consumption is reduced, the spatial arrangement of the whole vehicle can be optimized, and the cost is reduced.
In the description of this specification, any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of custom logic functions or processes, and alternate implementations are included within the scope of the preferred embodiment of the present invention 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.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement 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). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can 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 should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (15)

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 fan heater, 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 fan heater and a cooling liquid inlet of the gearbox oil cooler are all communicated with a cooling liquid outlet of the engine water jacket, a cooling liquid inlet of the electronic pump is respectively connected 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 fan heater 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 return 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 between a coolant inlet of the air heater and a coolant outlet of the engine water jacket, the second control valve is arranged on a connecting pipeline between a coolant inlet of the gearbox oil cooler and a coolant outlet of the engine water jacket, and the third control valve is arranged on a connecting pipeline between a coolant inlet of the radiator and a coolant outlet of the engine water jacket;
the control module is connected with the first control valve, the second control valve and the third control valve respectively, is used for acquiring the temperature information, the heat exchange demand information and the whole vehicle running state information of the cooling circulation module, and controls 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.
2. The engine thermal management system of claim 1, wherein the coolant circulation module further comprises:
the first input of three-way valve with the coolant liquid exit linkage of air heater, the second input of three-way valve with the coolant liquid exit linkage of gearbox oil cooler, the output of three-way valve with the coolant liquid exit linkage of electron pump.
3. The engine thermal management system of claim 1, wherein the control module comprises:
the data receiving unit is used for receiving the outlet temperature of the radiator, the outlet temperature of the air heater, the outlet temperature of the engine oil cooler and the outlet temperature of the gearbox oil cooler, receiving cooling demand information of the radiator, the air heater demand information and the heating/cooling demand information of the gearbox oil cooler, and receiving running state information of the whole vehicle;
an engine temperature sensor for acquiring an outlet temperature of the engine;
the control unit, with the data receiving unit with engine temperature sensor connects respectively, is used for the basis according to the outlet temperature of radiator the outlet temperature of fan heater the outlet temperature of engine oil cooler with the outlet temperature of gearbox oil cooler the outlet temperature of engine the cooling demand information of radiator the fan heater the heating demand information with the heating/cooling demand information of gearbox oil cooler and whole car running state information control first control valve the second control valve with the valve on-off state of any one in the third control valve.
4. The engine thermal management system of claim 3, wherein the control unit, in controlling the valve open and close 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:
if the warm air demand is determined according to the warm air demand information of the warm air device, controlling the first control valve to be opened;
determining that a heating/cooling demand exists according to the heating/cooling demand information of the gearbox oil cooler, and controlling the second control valve to be opened;
and if the cooling demand is determined according to the cooling demand information of the radiator, controlling the third control valve to be opened.
5. The engine thermal management system of claim 3, wherein the control unit, in controlling the valve open and close state of any of the first control valve, the second control valve, and the third control valve, is further configured to,
determining the operating conditions of the engine according to the outlet temperature of the radiator, the outlet temperature of the air 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 running state information of the whole vehicle, wherein the operating conditions comprise a warming-up condition, a warm air condition and a large circulation condition;
and 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 the operation condition of the engine.
6. The engine thermal management system according to claim 5, wherein the control unit is configured to control the first control valve, the second control valve, and the third control valve to be closed in the warm-up condition, or to control the second control valve and the third control valve to be opened and the first control valve to be closed in the warm-up condition, or to control the first control valve, the second control valve, and the third control valve to be opened in the large-cycle condition, when the valve open/close state of any one of the first control valve, the second control valve, and the third control valve is controlled according to the operating condition of the engine.
7. The engine thermal management system according to claim 5 or 6, wherein the control unit is further configured to calculate an opening degree of a control valve according to the heat exchange demand information of the coolant circulation module to control the corresponding control valve to be opened, obtain a target operating temperature of the engine according to the operating condition of the engine, and adjust the opening degree of the control valve according to the target operating temperature of the engine and the outlet temperature of the engine.
8. A method of engine thermal management for use in an engine thermal management system according to any of claims 1 to 7, the method comprising:
acquiring temperature information and heat exchange demand information of the cooling circulation module and running state information of the whole vehicle;
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.
9. The engine thermal management method of claim 8,
the temperature information and the heat exchange demand information of the cooling circulation module and the running state information of the whole vehicle are acquired, and the method comprises the following steps:
acquiring the outlet temperature of a radiator, the outlet temperature of a fan heater, the outlet temperature of an engine oil cooler, the outlet temperature of a gearbox oil cooler and the outlet temperature of an engine, acquiring cooling demand information of the radiator, the heating demand information of the fan heater and the heating/cooling demand information of the gearbox oil cooler, and acquiring running state information of a whole vehicle;
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, and the method comprises the following steps:
according to the exit temperature of radiator the exit temperature of air heater the exit temperature of engine oil cooler with the exit temperature of gearbox oil cooler the exit temperature of engine the cooling demand information of radiator the warm braw demand information of air heater with the heating/cooling demand information of gearbox oil cooler and whole car running state information control first control valve the second control valve with the valve on-off state of any one in the third control valve.
10. The engine thermal management method according to claim 9, wherein controlling a valve open/close 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 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 heating demand information of the air heater, and the heating/cooling demand information of the transmission oil cooler, and the vehicle running state information includes performing at least one of:
if the warm air demand is determined according to the warm air demand information of the warm air device, controlling the first control valve to be opened;
determining that a heating/cooling demand exists according to the heating/cooling demand information of the gearbox oil cooler, and controlling the second control valve to be opened;
and if the cooling demand is determined according to the cooling demand information of the radiator, controlling the third control valve to be opened.
11. The engine thermal management method according to claim 9, wherein controlling a valve open/close 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 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 heating demand information of the air heater, and the heating/cooling demand information of the transmission oil cooler, and the vehicle operation state information, further comprises:
determining the operating conditions of the engine according to the outlet temperature of the radiator, the outlet temperature of the air 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 running state information of the whole vehicle, wherein the operating conditions comprise a warming-up condition, a warm air condition and a large circulation condition;
and 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 the operation condition of the engine.
12. The engine thermal management method of claim 11, wherein controlling a valve open state of any of the first control valve, the second control valve, and the third control valve based on an operating condition of the engine comprises:
controlling the first control valve, the second control valve and the third control valve to be closed under the warming working condition;
or, when the hot air is in the working condition, 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, when the large circulation working condition exists, the first control valve, the second control valve and the third control valve are controlled to be opened.
13. The engine thermal management method of claim 11 or 12, further comprising:
calculating the opening of the control valve according to the heat exchange demand information of the cooling liquid circulation module so as to control the corresponding control valve to be opened; and
obtaining a target working temperature of the engine according to the operating condition of the engine;
and adjusting the opening of the control valve according to the target working temperature of the engine and the outlet temperature of the engine.
14. The engine thermal management method of claim 13, wherein obtaining an engine target operating temperature based on operating conditions in which the engine is operating comprises:
setting the target working temperature of the engine to be a first temperature when the rotating speed of the engine is less than a first rotating speed and the load is less than a first load;
the rotating speed of the engine is larger than a second rotating speed, the load is larger than a 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.
15. A vehicle comprising an engine and the engine thermal management system of any of claims 1-7.
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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