CN112483236A - Engine thermal management system - Google Patents
Engine thermal management system Download PDFInfo
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- CN112483236A CN112483236A CN202011352923.5A CN202011352923A CN112483236A CN 112483236 A CN112483236 A CN 112483236A CN 202011352923 A CN202011352923 A CN 202011352923A CN 112483236 A CN112483236 A CN 112483236A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/20—Cooling circuits not specific to a single part of engine or machine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
- B60H1/04—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant
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- 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
- F01M5/001—Heating
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- 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
- F01M5/02—Conditioning lubricant for aiding engine starting, e.g. heating
- F01M5/021—Conditioning lubricant for aiding engine starting, e.g. heating by heating
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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
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/14—Indicating devices; Other safety devices
- F01P11/16—Indicating devices; Other safety devices concerning coolant temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
- F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
- F02N19/10—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines by heating of engine coolants
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- 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
- F16H57/0413—Controlled cooling or heating of lubricant; Temperature control therefor
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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
- F01P2050/00—Applications
- F01P2050/22—Motor-cars
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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
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/04—Lubricant cooler
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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
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/04—Lubricant cooler
- F01P2060/045—Lubricant cooler for transmissions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention discloses an engine heat management system, which comprises an engine water pump, a first branch, a second branch, a third branch and a fourth branch, wherein the engine water pump is connected with the first branch through a water pipe; the first branch is provided with a cylinder cover water jacket and a cylinder cover valve arranged at the downstream of the cylinder cover water jacket, and the liquid inlet end of the first branch is connected with the liquid outlet end of the engine water pump; the second branch is provided with a cylinder water jacket and a cylinder thermostat arranged at the downstream of the cylinder water jacket, and the liquid inlet end of the second branch is connected with the liquid outlet end of the engine water pump; a radiator valve and a radiator arranged at the downstream of the radiator valve are arranged on the third branch, and the liquid outlet end of the third branch is connected with the liquid inlet end of the engine water pump; the liquid outlet end of the first branch, the liquid outlet end of the second branch and the liquid inlet end of the third branch are all connected with the fourth branch. This application reduces whole cooling system pressure loss, and then reduces discharge capacity and lift of engine water pump, reduces its consumption promptly. Meanwhile, the cold start stage of the engine can be ensured, the temperature of the cooling liquid at the position of the engine cylinder body is quickly raised, and the cold start emission is improved.
Description
Technical Field
The invention relates to the technical field of cooling systems, in particular to an engine thermal management system.
Background
The heat management system of the engine mainly comprises a cooling water jacket, a water pump, a thermostat, a warm air core body, an engine oil cooler, a gearbox oil cooler, a radiator, a cooling fan, a cooling pipeline and other parts.
The cylinder body and the cylinder cover water jacket in the traditional engine heat management system are usually designed in series, and the peripheral cooling loop is generally designed in series-parallel connection, so that the pressure loss of the whole cooling system is large, the flow and the lift of a water pump are large, the power consumption is high, a thermostat has a normally open loop, and when an engine is started in a cold mode, the temperature of cooling liquid at the position of the cylinder body of the engine is slowly increased. For example, the opening and closing of the traditional wax thermostat are realized by passively sensing the temperature of the engine coolant, and the flow of the coolant of each loop is actively regulated according to the working condition of the engine, namely, the engine is difficult to work at the optimal temperature of the coolant under different working conditions. The warm air heating of the passenger compartment in the low-temperature environment and the cooling strategy of the gearbox in the normal-temperature and high-temperature environments are not clear, and both the warm air heating and the cooling strategies can not be considered to have benefits. Meanwhile, a normally open loop exists in the traditional thermostat, zero flow control cannot be realized in the warming-up stage, heat exchange always exists between the traditional thermostat and other elements from cold starting, and the warming-up process is slow.
Therefore, how to increase the temperature rise speed of the coolant at the engine cylinder position in the cold start stage of the engine while reducing the pressure loss is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide an engine thermal management system which can reduce pressure loss and improve the temperature rising speed of cooling liquid at an engine cylinder position in the cold start stage of an engine.
To achieve the above object, the present invention provides an engine thermal management system, comprising:
an engine water pump;
the engine water pump comprises a first branch, a second branch and a third branch, wherein the first branch is provided with a cylinder cover water jacket and a cylinder cover valve arranged at the downstream of the cylinder cover water jacket, and the liquid inlet end of the first branch is connected with the liquid outlet end of the engine water pump;
the second branch is provided with a cylinder water jacket and a cylinder thermostat arranged at the downstream of the cylinder water jacket, and the liquid inlet end of the second branch is connected with the liquid outlet end of the engine water pump;
the third branch is provided with a radiator valve and a radiator arranged at the downstream of the radiator valve, and the liquid outlet end of the third branch is connected with the liquid inlet end of the engine water pump;
and the liquid outlet end of the first branch, the liquid outlet end of the second branch and the liquid inlet end of the third branch are all connected with the fourth branch.
Preferably, the liquid outlet end of the engine water pump is connected with the water attachment sleeve, and the liquid inlet end of the first branch and the liquid inlet end of the second branch are both connected with the liquid outlet end of the water attachment sleeve.
Preferably, the cylinder thermostat is an internal leakage thermostat.
Preferably, the cylinder head valve and the radiator valve are integrally provided.
Preferably, the method further comprises the following steps:
the engine oil cooler is arranged on the fifth branch, the liquid inlet end of the fifth branch is connected with the fourth branch, and the liquid outlet end of the fifth branch is connected with the liquid inlet end of the engine water pump;
the hydraulic control system comprises a sixth branch, a hydraulic control system and a hydraulic control system, wherein the sixth branch is provided with a first switch valve and a gearbox oil cooler arranged on the downstream of the first switch valve, the liquid inlet end of the sixth branch is connected with the fourth branch, and the liquid outlet end of the sixth branch is connected with the liquid inlet end of the engine water pump;
the second switch valve and the warm air core body arranged on the downstream of the second switch valve are arranged on the seventh branch, the liquid inlet end of the seventh branch is connected with the fourth branch, and the liquid outlet end of the seventh branch is connected with the liquid inlet end of the engine water pump;
and the eighth branch is provided with a waste gas recirculation cooler, the liquid inlet end of the eighth branch is connected with the fourth branch, and the liquid outlet end of the eighth branch is connected with the liquid inlet end of the engine water pump.
Preferably, the cylinder head valve, the cylinder thermostat and the radiator valve are integrally provided as a flow control valve module;
the water-cooled radiator comprises a flow control valve module, a water jacket, a first water temperature sensor, a second water temperature sensor and a third water temperature sensor, wherein the first water temperature sensor is used for sensing the temperature of cooling liquid in the water jacket of the cylinder cover, the second water temperature sensor is used for sensing the temperature of the cooling liquid in the flow control valve module, and the third water temperature sensor is used for sensing the temperature of cooling liquid.
Preferably, when the engine is in a warm-up phase, the head valve, the block thermostat and the radiator valve are all in a closed state.
Preferably, the vehicle further comprises a controller, when the engine operates in a low-temperature environment and the controller receives a warm air command of a passenger compartment, the controller controls the cylinder head valve to be opened, the second switch valve to be opened and the first switch valve to be closed when the first water temperature sensor detects that the temperature is higher than a first temperature value; when the first water temperature sensor detects that the temperature is higher than a first temperature value, the controller controls the first switch valve to be opened, and the second temperature value is larger than the first temperature value.
Preferably, when the engine is in a normal operation stage, the cylinder head valve is gradually opened or nearly fully opened, the radiator valve is in a closed state, the first and second on-off valves are in an open state, and the block thermostat is in a closed state.
Preferably, when the coolant of the engine is in a high water temperature operation stage, the cylinder head valve is fully opened, the radiator valve is gradually opened, and when the coolant temperature is higher than the preset cylinder thermostat temperature, the cylinder thermostat is gradually opened.
Preferably, when the coolant of the engine is in a low water temperature operating phase, the head valve is fully open, and the block thermostat and the radiator valve are gradually opened or close to being fully open.
Preferably, the cooling system further comprises a tenth branch, wherein a liquid inlet end of the tenth branch is connected with a liquid outlet end of the cylinder cover water jacket, a liquid outlet end of the tenth branch is connected with a liquid inlet end of the radiator, and a check valve is arranged on the tenth branch and used for controlling the cooling liquid of the tenth branch to be conducted to the cylinder cover water jacket in a one-way mode through the radiator.
Preferably, the cylinder head and the exhaust manifold integrated on the cylinder head are further included, and the first branch further comprises an IEM water jacket, wherein the IEM water jacket is arranged in parallel with the cylinder head water jacket and is located at the upstream of the cylinder head valve.
In the technical scheme, the engine heat management system provided by the invention comprises an engine water pump, a first branch, a second branch, a third branch and a fourth branch; the first branch is provided with a cylinder cover water jacket and a cylinder cover valve arranged at the downstream of the cylinder cover water jacket, and the liquid inlet end of the first branch is connected with the liquid outlet end of the engine water pump; the second branch is provided with a cylinder water jacket and a cylinder thermostat arranged at the downstream of the cylinder water jacket, and the liquid inlet end of the second branch is connected with the liquid outlet end of the engine water pump; a radiator valve and a radiator arranged at the downstream of the radiator valve are arranged on the third branch, and the liquid outlet end of the third branch is connected with the liquid inlet end of the engine water pump; the liquid outlet end of the first branch, the liquid outlet end of the second branch and the liquid inlet end of the third branch are all connected with the fourth branch.
According to the engine heat management system, the first branch and the second branch are arranged in parallel, pressure loss of the whole cooling system is reduced, and then the displacement and the lift of the engine water pump are reduced, namely power consumption of the engine water pump is reduced. Meanwhile, a cylinder cover valve is arranged at the downstream of the cylinder cover water jacket, a cylinder body thermostat is arranged at the downstream of the cylinder body water jacket, the cylinder body thermostat and the cylinder cover valve are closed in a cold start stage, the first branch and the second branch almost have no heat exchange with cooling liquid at other positions, the temperature of the cooling liquid at the position of the engine cylinder body is rapidly increased, and cold start emission is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an engine thermal management system according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating an installation position of a control valve module according to an embodiment of the present invention;
FIG. 3 is a strategy diagram of an engine thermal management system according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a cylinder thermostat provided in an embodiment of the present invention;
FIG. 5 is a top view of a cylinder thermostat provided in accordance with an embodiment of the present invention.
Wherein in FIGS. 1-2, 4-5:
a1-a first branch, A2-a second branch, A3-a third branch, A4-a fourth branch, A5-a fifth branch, A6-a sixth branch, A7-a seventh branch, A8-an eighth branch, A9-a ninth branch, and A10-a tenth branch;
01-engine water pump, 02-auxiliary water jacket, 03-cylinder cover water jacket, 04-cylinder body water jacket, 05-flow control valve module, 06-cylinder cover valve, 07-cylinder body thermostat, 08-radiator valve, 09-engine oil cooler, 10-gearbox oil cooler, 11-second switch valve, 12-radiator, 13-cooling fan, 14-first switch valve, 15-warm air core body, 16-waste gas recirculation cooler, 17-expansion kettle, 18-first water temperature sensor, 19-second water temperature sensor, 20-third water temperature sensor and 21-one-way valve.
Detailed Description
The core of the invention is to provide an engine thermal management system, which can reduce pressure loss and improve the temperature rise speed of cooling liquid at the position of an engine cylinder body in the cold start stage of an engine.
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and embodiments.
Please refer to fig. 1 to 5.
In one embodiment, an engine thermal management system according to an embodiment of the present invention includes:
an engine water pump 01;
the first branch A1 is provided with a cylinder cover water jacket 03 and a cylinder cover valve 06 arranged at the downstream of the cylinder cover water jacket 03 on a first branch A1, and the liquid inlet end of the first branch A1 is connected with the liquid outlet end of the engine water pump 01.
A second branch A2, wherein a cylinder water jacket 04 and a cylinder thermostat 07 arranged at the downstream of the cylinder water jacket 04 are arranged on the second branch A2, and the liquid inlet end of the second branch A2 is connected with the liquid outlet end of the engine water pump 01; i.e. the first branch a1 and the second branch a2 are arranged in parallel.
And a radiator valve 08 and a radiator 12 arranged at the downstream of the radiator valve 08 are arranged on the third branch A3 and the third branch A3, and the liquid outlet end of the third branch A3 is connected with the liquid inlet end of the engine water pump 01.
And a fourth branch A4, wherein the liquid outlet end of the first branch A1, the liquid outlet end of the second branch A2 and the liquid inlet end of the third branch A3 are all connected with a fourth branch A4.
The cylinder cover valve 06 controls the on-off and flow of the first branch A1 loop, the cylinder thermostat 07 controls the on-off and flow of the second branch A2 loop, and the radiator valve 08 controls the on-off and flow of the third branch A3 loop. Among them, the head valve 06, the radiator valve 08, and the cylinder thermostat 07 can be manually operated and controlled by a user. In order to realize intelligent control, the opening and closing and the opening degree of the cylinder head valve 06, the radiator valve 08 and the cylinder thermostat 07 are controlled by a controller.
As can be seen from the above description, in the engine thermal management system provided in the embodiment of the present application, the first branch a1 and the second branch a2 are arranged in parallel, so that the pressure loss of the entire cooling system is reduced, and further, the displacement and the lift of the engine water pump 01 are reduced, that is, the power consumption of the engine water pump is reduced. Meanwhile, as the cylinder head valve 06 is arranged at the downstream of the cylinder head water jacket 03, the cylinder body thermostat 07 is arranged at the downstream of the cylinder body water jacket 04, the cylinder body thermostat 07 and the cylinder head valve 06 are closed in the cold starting stage, the first branch A1 and the second branch A2 have almost no heat exchange with cooling liquid at other positions, the temperature of the cooling liquid at the position of the engine cylinder body is quickly increased, the warming speed of the engine is increased, and the cold starting emission is improved.
In a specific embodiment, the outlet end of the engine water pump 01 is connected with the water attaching sleeve 02, and the inlet end of the first branch A1 and the inlet end of the second branch A2 are both connected with the outlet end of the water attaching sleeve 02. Namely, the coolant of the engine water pump 01 is distributed to the cylinder cover water jacket 03 and the cylinder cover water jacket 04 through the auxiliary water jacket 02, namely, the cylinder body and the cylinder cover adopt relatively independent separated cooling.
Specifically, the head valve 06, the cylinder thermostat 07, and the radiator valve 08 are integrally provided as a flow control valve module 05. The engine thermal management system further comprises a first water temperature sensor 18 for sensing the temperature of the cooling liquid in the cylinder head water jacket 03, a second water temperature sensor 19 for sensing the temperature of the cooling liquid in the control valve module, and a third water temperature sensor 20 for sensing the temperature of the cooling liquid in the radiator 12.
Specifically, the cylinder head valve 06 and the radiator valve 08 are integrally provided. The cylinder head valve 06 and the radiator valve 08 can be integrated in a "ball" shaped communication block, i.e. the hollow cavity of the "ball" shaped communication block connects the cylinder head valve 06 and the radiator valve 08 to the housing of the flow control valve module 05 through two connecting structures. In the warming-up stage, the cylinder cover valve 06, the radiator valve 08 and the cylinder body thermostat 07 are all in a closed state, and the cylinder cover water jacket 03 and the cylinder body water jacket 04 are all in a non-flowing state, so that the engine is warmed up quickly.
As shown in fig. 4 and 5, the cylinder thermostat 07 is an internal leakage thermostat, that is, the cylinder thermostat 07 is a high-temperature leakage thermostat, the temperature of the wax pack is relatively high, and an internal leakage temperature sensing water path is arranged in the cylinder thermostat, so that the leakage amount is very small, and the temperature rise of the cylinder is not affected. The independent cylinder thermostat enables the temperature of the cylinder cooling liquid to rise rapidly and simultaneously can maintain higher temperature
The opening temperature of the cylinder body thermostat 07 is higher than that of a traditional thermostat, a special temperature sensing water path is not needed, temperature sensing can be achieved by means of self micro circulation holes, the flow control valve is designed to be integrated on two linked balls relative to the cylinder cover valve 06, the cylinder body valve and the radiator valve 08, flexible independent control can be achieved, the engine can work at the optimal target cooling liquid temperature in the normal working stage, meanwhile, the cylinder cover and the cylinder body can reach different cooling liquid temperatures, namely, the temperature of the cylinder cover cooling liquid is lower, the temperature of the cylinder body water jacket 04 is higher, friction power loss is reduced, the cylinder cover valve 06 and the radiator valve 08 can actively adjust the flow of the cooling liquid of each loop through the controller according to the running working condition of the engine, the engine can work at the optimal cooling liquid temperature, fuel consumption is reduced, and the knocking tendency of the cylinder cover is inhibited.
In one embodiment, the engine thermal management system further comprises:
the fifth branch A5 is provided with an engine oil cooler 09 on the fifth branch A5, the liquid inlet end of the fifth branch A5 is connected with the fourth branch A4, and the liquid outlet end of the fifth branch A5 is connected with the liquid inlet end of the engine water pump 01.
The sixth branch A6 is provided with a first switch valve 14 and a gearbox oil cooler 10 arranged on the downstream of the first switch valve 14 on the sixth branch A6, the liquid inlet end of the sixth branch A6 is connected with the fourth branch A4, and the liquid outlet end of the sixth branch A6 is connected with the liquid inlet end of the engine water pump 01.
The seventh branch A7 is provided with a second switch valve 11 and a warm air core body 15 arranged at the downstream of the second switch valve 11 on the seventh branch A7, the liquid inlet end of the seventh branch A7 is connected with the fourth branch A4, and the liquid outlet end of the seventh branch A7 is connected with the liquid inlet end of the engine water pump 01.
And an eighth branch A8, wherein an exhaust gas recirculation cooler 16 is arranged on the eighth branch A8, the liquid inlet end of the eighth branch A8 is connected with the fourth branch A4, and the liquid outlet end of the eighth branch A8 is connected with the liquid inlet end of the engine water pump 01. The cooling part engine oil cooler 09, the gearbox oil cooler 10 and the warm air core body 15 are connected by adopting a parallel loop, so that the pressure loss of the whole cooling system is reduced, the discharge capacity and the lift of a water pump are reduced, and the power consumption of the water pump is reduced.
In a specific embodiment, the engine thermal management system further comprises a ninth branch a9 and a tenth branch a10, wherein the ninth branch a9 is provided with an expansion water tank 17, and the tenth branch a10 is provided with a check valve 21 for controlling the unidirectional communication of the coolant of the tenth branch a10 from the radiator 12 to the cylinder head water jacket 03.
The liquid inlet end of the ninth branch A9 and the liquid inlet end of the tenth branch A10 are connected with the liquid outlet end of the cylinder cover water jacket 03 through a tee piece. The liquid outlet end of the ninth branch pipe A9 is connected with the liquid inlet end of the engine water pump 01, and the liquid outlet end of the tenth branch pipe A10 is connected with the liquid inlet end of the radiator 12. When the cylinder cover valve 06 is closed, the coolant in the cylinder cover water jacket 03 can not flow to the radiator 12 through the one-way valve 21 and then flows into the engine cylinder cover and the engine cylinder body through the engine water pump 01, and the situation that the warm-up is influenced when the cold water in the radiator 12 enters the engine is prevented.
Since the heat demand of the engine is high during the engine warm-up process of the transmission oil cooler 10 and the warm air core body 15, in order to ensure the engine warm-up performance and further improve the fuel economy and the passenger compartment warm air comfort, the first switch valve 14 and the second switch valve 11 are arranged on the sixth branch A6 and the seventh branch A7, and the first switch valve 14 and the second switch valve 11 can be driven to be switched on and off according to the ambient temperature and the driving condition. Such as: under the low-temperature environment, the passenger compartment has a warm air demand, when the temperature of the engine coolant reaches a first temperature value, the cylinder cover valve 06 is opened, the second switch valve 11 is opened firstly to supply the high-temperature coolant in the cylinder cover water jacket 03 to the warm air core body 15, so that the warm air heat supply demand of the passenger compartment is ensured, at the moment, the first switch valve 14 is still closed until the warming is completed, namely, the first switch valve 14 is opened again to supply the high-temperature coolant for the gearbox oil cooler 10 when the temperature of the engine coolant reaches a second temperature value, so that the viscosity of the gearbox lubricating oil is reduced, and the transmission friction power loss and the vehicle oil consumption are reduced.
In order to improve the automatic control and reduce the operation difficulty, the engine thermal management system preferably further comprises a controller, wherein when the engine operates in a low-temperature environment and the controller receives a warm air command of a passenger compartment, the controller controls the cylinder cover valve 06 to be opened, the second switch valve 11 to be opened and the first switch valve 14 to be closed when the temperature detected by the first water temperature sensor 18 is higher than a first temperature value; when the first water temperature sensor 18 detects that the temperature is higher than the first temperature value, the controller controls the first switch valve 14 to open, and the second temperature value is greater than the first temperature value.
Under normal temperature and high temperature environment, the passenger cabin has no warm air demand, once the temperature of the engine coolant reaches a third temperature value, the cylinder cover valve 06 is opened, the first switch valve 14 is opened firstly to supply the high-temperature coolant in the cylinder cover water jacket 03 to the transmission oil cooler 10, the viscosity of the transmission lubricating oil is reduced, the transmission friction power loss and the oil consumption of the whole vehicle are reduced, but the second switch valve 11 is still closed at the moment, and the second switch valve 11 is opened to normally open a warm air loop until the warming-up is completed, namely the temperature of the engine coolant reaches a fourth temperature value, wherein the fourth temperature value is greater than the third temperature value, the first temperature value can be the same as the third temperature value, and the second temperature value is the same as the fourth temperature value.
The first switch valve 14 and the second switch valve 11 adjust the opening strategy in the warming process according to different ambient temperatures and the warm air demand of the passenger compartment, so that the warming performance of an engine and the warm air comfort of the passenger compartment can be ensured, the viscosity of lubricating oil of a gearbox and the transmission friction power loss can be reduced, and the oil consumption of the whole vehicle is further reduced.
Specifically, the radiator 12 is provided with a cooling fan 13.
In one embodiment, when the engine is in a normal operation stage, the head valve 06 is gradually opened or nearly fully opened, the radiator valve 08 is in a closed state, the first and second switching valves 14 and 11 are in an open state, and the block thermostat 07 is in a closed state. The heat exchange between the cooling liquid in the cylinder cover water jacket 03 and the engine oil cooler 09, the transmission oil cooler 10, the warm air core body 15 and the exhaust gas recirculation cooler 16 is performed, the temperature rising rate tends to be gentle, but the cylinder water jacket 04 is still closed due to the cylinder thermostat 07, only a small amount of cooling liquid flows out for wax package temperature sensing, and the temperature of the internal cooling liquid continues to rise. Meanwhile, the temperature of the lubricating oil in the engine oil cooler 09 and the temperature of the lubricating oil in the gearbox oil cooler 10 continue to rise, the friction work loss in the engine and the gearbox is reduced, and the fuel consumption is reduced.
When the engine is in a high water temperature operation stage, the cylinder head valve 06 is fully opened, the radiator valve 08 is gradually opened, and when the temperature of the coolant is higher than the preset temperature of the cylinder thermostat 07, the cylinder thermostat 07 is gradually opened. The cylinder cover valve 06 is fully opened, the radiator valve 08 is gradually opened, the cylinder cover water jacket 03 coolant gradually participates in the major cycle, the coolant temperature does not rise any more and has a slow descending trend, the initial opening temperature of the cylinder body thermostat 07 is set to be higher and is independently controlled, when the cylinder body water jacket 04 coolant temperature reaches the opening temperature, the cylinder body thermostat 07 is slowly opened, at the moment, the cylinder body water jacket 04 coolant also gradually participates in the major cycle, the temperature rise also tends to be gentle, finally the engine works at the optimal high target coolant temperature, meanwhile, the cylinder cover and the cylinder body can reach different coolant temperatures, namely, the cylinder cover water jacket 03 coolant temperature is lower, the cylinder body water jacket 04 coolant temperature is higher, the friction work loss is reduced, the fuel consumption is reduced, and the engine knocking trend is inhibited.
When the engine is in a low water temperature operating phase, the cylinder head valve 06 is fully open, and the cylinder thermostat 07 and radiator valve 08 are gradually opened or nearly fully opened. At this time, most of the coolant of the cylinder water jacket 04 and the cylinder head water jacket 03 participates in the large circulation, the coolant temperature rapidly drops to the optimal low target coolant temperature, the knocking tendency of the engine is restrained, the dynamic property is kept, and meanwhile, the engine parts are prevented from being damaged.
Specifically, the temperature of the coolant may be sensed by a temperature sensor connected to the controller, and then the temperature value of the temperature sensor is compared with a low water temperature standard value and a high water temperature standard value, and the controller controls the operation of the head valve 06, the block thermostat 07, and the radiator valve 08.
On the basis of the above schemes, preferably, the engine thermal management system further includes a cylinder head and an exhaust manifold integrated on the cylinder head, the first branch further includes an IEM water jacket, the IEM water jacket is adjacent to the exhaust manifold or is sleeved outside the exhaust manifold, the IEM water jacket is located at the upstream of the cylinder head valve 06, the IEM water jacket is arranged in parallel with the cylinder head water jacket 03, the cylinder head water jacket 03 and the IEM water jacket are preferably divided into two layers of water jackets, specifically, one is an upper layer, and the other is a lower layer. The cylinder cover integrated exhaust manifold can utilize exhaust high temperature to rapidly heat the cylinder cover water jacket 03, and then utilizes high-temperature cooling liquid to heat other parts, thereby being beneficial to rapid warming.
In conclusion, the heating speed of the cylinder body cooling liquid is increased, the temperature of the cooling liquid can be maintained to be higher, meanwhile, the warm air heating effect in the low-temperature environment and the cooling strategy optimization of the gearbox in the normal-temperature and high-temperature environments are improved, and the purposes of quickly warming up, reducing oil consumption, improving cold start emission and improving the comfort of the passenger cabin in the low-temperature environment are finally achieved. Simultaneously this application, above-mentioned a plurality of valve bodies open the strategy according to ambient temperature's difference, can improve the warm braw heating effect under the low temperature and have gearbox cooling strategy optimization concurrently, further reduce whole car oil consumption.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (13)
1. An engine thermal management system, comprising:
an engine water pump (01);
the engine water pump comprises a first branch (A1), a cylinder cover water jacket (03) and a cylinder cover valve (06) arranged on the downstream of the cylinder cover water jacket (03) are arranged on the first branch (A1), and the liquid inlet end of the first branch (A1) is connected with the liquid outlet end of the engine water pump (01);
a second branch (A2) is provided with a cylinder water jacket (04) and a cylinder thermostat (07) arranged at the downstream of the cylinder water jacket (04), and the liquid inlet end of the second branch (A2) is connected with the liquid outlet end of the engine water pump (01);
a third branch (A3), a radiator valve (08) and a radiator (12) arranged at the downstream of the radiator valve (08) are arranged on the third branch (A3), and the liquid outlet end of the third branch (A3) is connected with the liquid inlet end of the engine water pump (01);
and a fourth branch (A4), wherein the liquid outlet end of the first branch (A1), the liquid outlet end of the second branch (A2) and the liquid inlet end of the third branch (A3) are all connected with the fourth branch (A4).
2. The engine thermal management system according to claim 1, characterized in that the outlet end of the engine water pump (01) is connected with the water attachment sleeve (02), and the inlet end of the first branch (A1) and the inlet end of the second branch (A2) are both connected with the outlet end of the water attachment sleeve (02).
3. The engine thermal management system of claim 1, wherein the block thermostat (07) is an internal leakage thermostat.
4. The engine thermal management system of claim 1, characterized in that the cylinder head valve (06) and the radiator valve (08) are provided integrally.
5. The engine thermal management system of claim 1, further comprising:
a fifth branch (A5), wherein an engine oil cooler (09) is arranged on the fifth branch (A5), the liquid inlet end of the fifth branch (A5) is connected with the fourth branch (A4), and the liquid outlet end of the fifth branch (A5) is connected with the liquid inlet end of the engine water pump (01);
a sixth branch (A6), wherein a first switch valve (14) and a gearbox oil cooler (10) arranged at the downstream of the first switch valve (14) are arranged on the sixth branch (A6), the liquid inlet end of the sixth branch (A6) is connected with the fourth branch (A4), and the liquid outlet end of the sixth branch (A6) is connected with the liquid inlet end of the engine water pump (01);
a seventh branch (A7), wherein a second switch valve (11) and a warm air core (15) arranged at the downstream of the second switch valve (11) are arranged on the seventh branch (A7), the liquid inlet end of the seventh branch (A7) is connected with the fourth branch (A4), and the liquid outlet end of the seventh branch (A7) is connected with the liquid inlet end of the engine water pump (01);
and an eighth branch (A8), be equipped with exhaust gas recirculation cooler (16) on eighth branch (A8), the inlet end of eighth branch (A8) with fourth branch (A4) are connected, the play liquid end of eighth branch (A8) with the inlet end of engine water pump (01) is connected.
6. The engine thermal management system of claim 5, characterized in that the cylinder head valve (06), the block thermostat (07) and the radiator valve (08) are integrally provided as a flow control valve module (05);
the water-cooling system is characterized by further comprising a first water temperature sensor (18) arranged for sensing the temperature of cooling liquid in the cylinder cover water jacket (03), a second water temperature sensor (19) used for sensing the temperature of cooling liquid in the flow control valve module (05) and a third water temperature sensor (20) used for sensing the temperature of cooling liquid at the outlet of the radiator (12).
7. The engine thermal management system of claim 6, characterized in that the head valve (06), the block thermostat (07), and the radiator valve (08) are all in a closed state when the engine is in a warm-up phase.
8. The engine thermal management system according to claim 7, further comprising a controller that controls the cylinder head valve (06) to be opened, the second on-off valve (11) to be opened, and the first on-off valve (14) to be closed when the first water temperature sensor (18) detects a temperature higher than a first temperature value when the engine is operating in a low temperature environment and the controller receives a passenger compartment warm air command; when the temperature detected by the first water temperature sensor (18) is higher than a first temperature value, the controller controls the first switch valve (14) to be opened, and the second temperature value is higher than the first temperature value.
9. The engine thermal management system of claim 5, characterized in that when the engine is in a normal operating phase, the head valve (06) is gradually opened or close to fully opened, the radiator valve (08) is in a closed state, the first and second on-off valves (14, 11) are in an open state, and the block thermostat (07) is in a closed state.
10. The engine thermal management system according to claim 5, characterized in that the cylinder head valve (06) is fully open when the coolant of the engine is in a high water temperature operating phase, the radiator valve (08) is gradually opened, and the block thermostat (07) is gradually opened when the coolant temperature is higher than the preset block thermostat (07) temperature.
11. The engine thermal management system of claim 5, characterized in that when the coolant of the engine is in a low water temperature operating phase, the head valve (06) is fully open, and the block thermostat (07) and the radiator valve (08) are gradually opened or nearly fully opened.
12. The engine thermal management system according to claim 1, further comprising a tenth branch (a10), wherein an inlet end of the tenth branch (a10) is connected with an outlet end of the cylinder head water jacket (03), an outlet end of the tenth branch (a10) is connected with an inlet end of the radiator (12), and a check valve (21) is arranged on the tenth branch (a10) to control the unidirectional communication of the coolant of the tenth branch (a10) from the radiator (12) to the cylinder head water jacket (03).
13. The engine thermal management system according to any of claims 1-12, further comprising a cylinder head and an exhaust manifold integrated on the cylinder head, the first branch further comprising an IEM water jacket disposed in parallel with a cylinder head water jacket (03) upstream of the head valve (06).
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| CN113530635A (en) * | 2021-08-25 | 2021-10-22 | 中国第一汽车股份有限公司 | Engine cooling system and car |
| CN114003076A (en) * | 2021-10-30 | 2022-02-01 | 重庆长安汽车股份有限公司 | Intelligent thermal management control method and system for power assembly and storage medium |
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| CN112483236B (en) | 2022-06-03 |
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