CN115370458A - Engine cooling system, engine cooling method, vehicle control system, vehicle, and storage medium - Google Patents
Engine cooling system, engine cooling method, vehicle control system, vehicle, and storage medium Download PDFInfo
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- CN115370458A CN115370458A CN202110542677.8A CN202110542677A CN115370458A CN 115370458 A CN115370458 A CN 115370458A CN 202110542677 A CN202110542677 A CN 202110542677A CN 115370458 A CN115370458 A CN 115370458A
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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
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
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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
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
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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
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
- F01P2003/027—Cooling cylinders and cylinder heads in parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
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- 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)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
An engine cooling system comprises a water tank and a radiator, wherein an electrodeless water pump, a cylinder cover, a cylinder body and a flow adjustable device are arranged between the water tank and the radiator; the water inlet pipe of the cylinder cover and the water inlet pipe of the cylinder body are both connected with the water outlet pipe of the electrodeless water pump, and the water outlet pipe of the cylinder cover and the water outlet pipe of the cylinder body are connected in parallel with the flow adjustable device; the water outlet pipe of the cylinder cover is provided with a first cylinder cover water outlet pipe and a second cylinder cover water outlet pipe which are connected with the water outlet pipe of the cylinder body in parallel, the first cylinder cover water outlet pipe is provided with an engine oil cooler, and the tail ends of the first cylinder cover water outlet pipe and the second cylinder cover water outlet pipe are both connected with a flow adjustable device. According to the invention, the cooling water paths of the cylinder body and the cylinder cover are controlled in parallel, and the flow-adjustable device respectively controls the on-off of each pipeline according to the strategy of the whole machine, so that the purposes of quickly warming up, improving the heat efficiency of the whole machine, reducing oil consumption and finally achieving the purposes of energy conservation and emission reduction are achieved.
Description
Technical Field
The invention relates to the technical field of engines, in particular to an engine cooling system, an engine cooling method, a vehicle control system, a vehicle and a storage medium.
Background
At present, a plurality of engine cooling systems on the market adopt cylinder bodies and cylinder covers to be connected with water paths in series, but inside an engine, the demands of the cylinder bodies and the cylinder covers on the cooling systems in the warming process are different. To facilitate in-cylinder fuel combustion, the cylinder block requires a relatively high temperature, but the exhaust system is concentrated on the cylinder head, so the cylinder head requires a relatively low temperature throughout the warm-up process to ensure reliability.
In addition, a thermostat in an engine cooling system regulates the circulation conditions of different open circuits for wax packs, the reaction is slow, and a mechanical water pump in the prior art outputs rotating speed by depending on a crankshaft of an engine, so that stepless regulation cannot be realized. The hot air loop at the rear end of the water pump is communicated, and the heat exchange efficiency is low by utilizing the low engine water temperature passing through the radiator. An engine oil cooler loop at the rear end of the water pump is communicated, and in a warming-up stage, engine oil needs to be heated by using cooling liquid cooled by an external circulating pipeline, so that the heat exchange efficiency is reduced, the warming-up speed is influenced, and the emission is influenced; after warming up is finished, the temperature of the cooling liquid passing through the radiator is relatively low, so that the temperature of the engine oil after heat exchange is relatively low, the viscosity of the engine oil is relatively high, the friction work proportion of the engine is improved, and the oil consumption of the engine is improved.
The foregoing description is provided for general background information and is not admitted to be prior art.
Disclosure of Invention
The invention provides an engine cooling system, an engine cooling method, a vehicle control system, a vehicle and a storage medium, which are used for reducing oil consumption and realizing energy conservation and emission reduction. The invention aims to cool a cylinder body and a cylinder cover as required, improve the heating efficiency of warm air and ensure that engine oil works at a higher temperature.
The first preferred embodiment of the invention firstly provides an engine cooling system which comprises a water tank and a radiator, wherein an electrodeless water pump, a cylinder cover, a cylinder body and a flow adjustable device are arranged between the water tank and the radiator; the water inlet pipe of the cylinder cover and the water inlet pipe of the cylinder body are connected in parallel and are connected with the water outlet pipe of the electrodeless water pump, and the water outlet pipe of the cylinder cover and the water outlet pipe of the cylinder body are connected in parallel with the flow adjustable device; the water outlet pipe of the cylinder cover is provided with a first cylinder cover water outlet pipe and a second cylinder cover water outlet pipe which are connected with the water outlet pipe of the cylinder body in parallel, the first cylinder cover water outlet pipe is provided with an engine oil cooler, and the tail ends of the first cylinder cover water outlet pipe and the second cylinder cover water outlet pipe are both connected with a flow adjustable device.
Further, in a second preferred embodiment of the present invention, the water outlet pipe of the cylinder cover includes a third cylinder cover water outlet pipe connected in parallel with the first cylinder cover water outlet pipe, the third cylinder cover water outlet pipe is provided with warm air, the beginning ends of the third cylinder cover water outlet pipe and the second cylinder cover water outlet pipe share the same section of pipeline, and the tail ends of the third cylinder cover water outlet pipe and the second cylinder cover water outlet pipe are both connected to the flow rate adjustable device.
Further, in a third preferred embodiment of the present invention, the flow rate adjustable device has a first water outlet pipe and a second water outlet pipe, the first water outlet pipe is provided with a small circulation passage, the second water outlet pipe is provided with a radiator, and the ends of the first water outlet pipe and the second water outlet pipe share the same pipeline and are connected to the electrodeless water pump.
Furthermore, in a fourth preferred embodiment of the present invention, the flow adjustable device further has a first water inlet pipe, a second water inlet pipe and a third water inlet pipe; the water outlet pipe of the first cylinder cover and the water outlet pipe of the third cylinder cover are connected with a first water inlet pipe, the water outlet pipe of the second cylinder cover is connected with a second water inlet pipe, and the water outlet pipe of the cylinder body is connected with a third water inlet pipe; the warm air is provided with a warm air inlet pipe, a first valve is arranged on the warm air inlet pipe, a second valve is arranged on the third water inlet pipe, a third valve is arranged on the first water outlet pipe, and a fourth valve is arranged on the second water outlet pipe; when the electrodeless water pump adopts different rotating speeds to provide flow for the engine cooling system as required, the flow adjustable device controls the on-off and flow of each branch through the first valve, the second valve, the third valve and the fourth valve.
The present invention further provides a vehicle having any of the engine cooling systems described above.
The present invention further provides an engine cooling method for use in any one of the above engine cooling systems, comprising the steps of: when the water temperature of the engine is lower than a warm-up threshold value T1, closing a first valve between the engine and warm air, and gradually opening the first valve when the water temperature of the engine is higher than the warm-up threshold value T1 and a warm-up demand exists; when the water temperature of the engine rises to a warming threshold value T1 and is lower than a second preset temperature T2 and warm air is required, gradually opening a first valve between the engine and a warm air device; when the water temperature of the engine is higher than a second preset temperature T2, the fourth valve is opened, if a warm air demand still exists, the first valve is still opened, and the application number of the warm air heating devices is reduced; when the water temperature of the engine is higher than a third preset temperature T3, gradually opening a second valve; when there is no demand for warm air, the first valve is closed.
The present invention further provides an engine cooling method for the engine cooling system in the second preferred embodiment, wherein in the warm-up stage, the engine cooling method comprises the steps of: when the water temperature of the engine is lower than a third preset temperature T, only the cylinder cover and the engine oil cooler are cooled; when the water temperature of the engine is higher than the third preset temperature T, the cylinder cover and the engine oil cooler are cooled, and meanwhile, the cooling strength of the cylinder body is gradually enhanced.
The present application further provides an engine cooling method for the engine cooling system in the above fourth preferred embodiment, wherein when there is a warm air demand, the engine cooling method includes the steps of: if the water temperature of the engine is higher than a warm-up threshold value T1 and lower than a second preset temperature T2, responding to a warm air demand; if the water temperature of the engine is lower than a warm-up threshold value T1, the warm air demand is not responded; if the temperature of the engine water is higher than the second preset temperature T2, a loop between the engine and the warm air is still opened, but the application number of the warm air heating devices is reduced.
The present application further provides a vehicle control system, comprising: a memory, a processor, a communication bus, and an engine cooling program stored on the memory; the communication bus is used for realizing communication connection between the processor and the memory; the processor is configured to execute an engine cooling program stored on the memory to implement the steps of the engine cooling method of any of the above.
The present application finally provides a storage medium having stored thereon an engine cooling program which, when executed by a processor, implements any of the engine cooling methods described above.
According to the invention, the cylinder body and cylinder cover cooling water paths are controlled in parallel, and the flow adjustable device respectively controls the on-off of each pipeline according to the strategy of the whole machine, so that the purposes of quickly warming up, improving the heat efficiency of the whole machine, reducing oil consumption and finally achieving energy conservation and emission reduction are achieved.
Drawings
FIG. 1 is a block diagram of an engine cooling system in accordance with a preferred embodiment of the present invention.
FIG. 2 is a block diagram of an engine cooling system according to another preferred embodiment of the present invention.
FIG. 3 is a flow chart illustrating an engine cooling method according to a preferred embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The terms first, second, third, fourth and the like in the description and in the claims of the present invention are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Referring to fig. 1, an engine cooling system according to a first preferred embodiment of the present invention includes a water tank 10 and a radiator 30. An electrodeless water pump 20, a cylinder cover 42, a cylinder body 44 and a flow-adjustable device 60 are arranged between the water tank 10 and the radiator 30. The water inlet pipe 422 of the cylinder cover 42 and the water inlet pipe 442 of the cylinder body 44 are connected in parallel and are both connected with the water outlet pipe 202 of the electrodeless water pump 20, and the water outlet pipe 424 of the cylinder cover 42 and the water outlet pipe 444 of the cylinder body 44 are connected in parallel with the flow-adjustable device 60. Through with cylinder body cylinder cap reposition of redundant personnel, can cool off according to the different demands of cylinder body respectively, be favorable to realizing accurate thermal management for the warm-up speed, and then promote complete machine thermal efficiency and reduce the emission. An electrodeless water pump is adopted, the rotating speed of the water pump is regulated in a stepless mode, the circulation conditions of different open circuits are regulated by matching with a flow regulating device, and the reaction is quick. The cylinder body and cylinder cover cooling water paths are controlled in parallel, and the flow adjustable device respectively controls the on-off of each pipeline according to the whole machine strategy, so that the purposes of quickly warming up, improving the heat efficiency of the whole machine, reducing oil consumption and finally achieving energy conservation and emission reduction are achieved.
Referring further to fig. 1, the water outlet pipe 424 of the cylinder cover 42 has a first cylinder cover water outlet pipe 421 and a second cylinder cover water outlet pipe 423 connected in parallel with the water outlet pipe 444 of the cylinder body 44, the oil cooler 82 is disposed on the first cylinder cover water outlet pipe 421, and the ends of the first cylinder cover water outlet pipe 421 and the second cylinder cover water outlet pipe 423 are both connected with the flow rate adjustable device 60, so that the oil cooler is disposed at the rear end of the cylinder cover and is controlled in parallel with the warm air. Arrange oil cooler at the cylinder cap rear end, ingenious solution oil cooler in the demand of different stages, including the warm-up stage to the demand such as engine oil heating, relatively higher oil temperature dispel the heat after the warm-up finishes. The engine oil cooler loop is arranged at the rear end of the cylinder cover, and the engine oil can be heated by cooling liquid which is not subjected to heat dissipation in the warming-up stage, so that the warming-up speed is increased, the engine oil emulsification risk is reduced, and the oil consumption and the emission are reduced; after the warming-up is finished, the relatively high engine water temperature can be used for cooling the engine oil, the relatively high engine oil temperature can reduce the friction work of the whole engine, and the heat efficiency of the engine is improved. The engine oil cooler and the warm air are controlled in parallel, so that in the warming process, extra energy dissipation caused by response of the warm air after series connection can be avoided, strategy conflict can be avoided, and network safety is realized.
The present invention further provides a second preferred embodiment, wherein the water outlet pipe 424 of the cylinder cover 42 includes a third cylinder cover water outlet pipe 425 connected in parallel with the first cylinder cover water outlet pipe 421, the third cylinder cover water outlet pipe 425 is provided with warm air 84, the beginning ends of the third cylinder cover water outlet pipe 425 and the second cylinder cover water outlet pipe 423 share the same section of pipeline, and the tail ends are connected to the flow rate adjusting device 60. The warm air 84 is arranged at the rear end of the cylinder cover 42, so that the characteristic that the cooling liquid does not pass through the radiator 30 and has relatively high temperature can be utilized, the heat exchange efficiency is improved, the heat efficiency of the engine is improved, and the oil consumption is reduced. The first valve 52 of the warm air 84 passage is arranged at the rear end of the cylinder cover, and the relatively high-temperature cooling liquid which does not pass through a pipeline or a radiator can be utilized, so that the warm air heat exchange efficiency is improved. By matching with the application of the electrodeless water pump and the flow adjustable device, the cooling system can realize the shunting control of the cylinder body and the cylinder cover as required, and meanwhile, the heat efficiency of the engine can be further improved by utilizing the arrangement mode of the engine oil cooler and the warm air pipeline, so that the energy conservation and emission reduction are realized.
The present invention further provides a third preferred embodiment, wherein the flow rate adjustable device 60 has a first water outlet pipe 602 and a second water outlet pipe 604, the first water outlet pipe 602 is provided with a small circulation passage 70, the second water outlet pipe 604 is provided with a radiator 30, and the ends of the first water outlet pipe 602 and the second water outlet pipe 604 share the same pipeline and are connected to the electrodeless pump 20.
The present invention further provides a fourth preferred embodiment, which can be seen in fig. 2, wherein the flow adjustable device 60 further comprises a first water inlet pipe 601, a second water inlet pipe 603 and a third water inlet pipe 605. The first cylinder cover water outlet pipe 421 and the third cylinder cover water outlet pipe 425 are connected with the first water inlet pipe 601, the second cylinder cover water outlet pipe 423 is connected with the second water inlet pipe 603, and the water outlet pipe 444 of the cylinder body 44 is connected with the third water inlet pipe 605. The warm air 84 has a warm air inlet pipe 842, a first valve 52 is provided on the warm air inlet pipe 842, a second valve 54 is provided on the third water inlet pipe 603, a third valve 56 is provided on the first water outlet pipe 602, and a fourth valve 58 is provided on the second water outlet pipe 604. When the stepless water pump adopts different rotating speeds to provide flow for the engine cooling system as required, the flow adjustable device controls the on-off and flow of each branch through the first valve 52, the second valve 54, the third valve 56 and the fourth valve 58.
In detail, the three inlets and two outlets of the flow-adjustable device 60 are respectively connected to different branches, the on-off and flow rate of each branch are controlled by the second valve 54, the third valve 56 and the fourth valve 58, and the second valve 54, the third valve 56 and the fourth valve 58 may be three ball valves. Specifically, the method comprises the following steps:
s11, after the whole vehicle is electrified, self-checking is carried out on a temperature control module and an engine water temperature sensor, and if a problem occurs, the whole vehicle is limited in torsion or switched to a large cycle;
step S13, if the temperature control module and the engine water temperature sensor are normal, reading the temperature of the engine water temperature sensor, and entering a normal working mode; water temperature sensors can be respectively arranged in the cylinder body and the cylinder cover, after the cooling system of the whole vehicle completes self-checking, the cooling system of the engine enters a normal working mode, whether the cooling system enters the normal working mode or not is judged by reading the water temperature of the engine, and the working state of each valve is judged;
step S15, a water path of the engine oil cooler is a normally open loop, engine oil is heated by cylinder cover water outlet in a warming-up stage, and after the engine oil is switched to a large circulation, the engine oil is heated or cooled by cooling liquid with relatively high temperature passing through a cylinder cover, so that the engine oil is ensured to work at relatively high temperature;
step S17, for the warm air loop, according to the warming requirement, in the warming stage that the water temperature of the engine is relatively low, namely when the water temperature of the engine is smaller than a warming threshold value T1, the warm air loop is cut off through the first valve 52, and the speed of the heat engine is mainly increased; when the water temperature of the engine is higher than the warming threshold value T1 and lower than a second preset temperature T2, gradually opening the first valve 52 to respond to a heating demand; when no warm air is needed, the passage is cut off through the first valve 52, the pressure loss of the cooling system is reduced, and the power consumption of the electrodeless water pump 20 is reduced;
in step S19, for the bypass system, in the warm-up phase, if the temperature of the engine water is lower than the third preset temperature T3, the second valve 54 between the cylinder 44 and the flow rate adjusting device 60 is closed and opened, and at this time, the oil cooler 82 and the warm air 84 respond to the requirements in step S15 and step S17, and when the temperature of the engine water is higher than the third preset temperature T3, the second valve 54 between the cylinder 44 and the flow rate adjusting device 60 is gradually opened.
The design of the electrodeless water pump and the flow adjustable device is an important part for realizing accurate heat management, the electrodeless water pump is not determined by the output rotating speed of an engine crankshaft any more, a specific rotating speed can be set according to the heat dissipation requirement of the whole system, and the flow adjustable device controls the on-off of each valve according to the requirement of each device.
In a fifth preferred embodiment of the present application, the present application provides a vehicle having any one of the engine cooling systems described above.
In a sixth preferred embodiment of the present application, the present application further provides an engine cooling method for use in any one of the engine cooling systems described above. In detail, in the warm-up stage, the engine cooling method comprises the following steps: when the water temperature of the engine is lower than a third preset temperature T3, only the cylinder cover and the engine oil cooler are cooled; when the water temperature of the engine is higher than the third preset temperature T3, the cylinder cover and the engine oil cooler are cooled, and meanwhile, the cooling strength of the cylinder body is gradually enhanced. The cylinder body and the cylinder cover are divided and cooled as required, a cylinder cover with higher heat dissipation requirements is subjected to an early opening strategy, and a cylinder body flow passage valve is opened later, so that the opening time point of the cylinder cover is earlier than that of the cylinder body, and the opening time point of the cylinder body is later than that of the cylinder cover, so that energy dissipation can be reduced, the heat engine speed is increased, and the cylinder cover becomes a part for realizing accurate heat management.
In a seventh preferred embodiment of the present application, the present application further provides an engine cooling method for the engine cooling system in the second preferred embodiment. In detail, when there is a demand for warm air, the engine cooling method includes the steps of: if the water temperature of the engine is higher than a warm-up threshold value T1 and lower than a second preset temperature T2, responding to a warm air demand; if the water temperature of the engine is lower than a warm-up threshold value T1, the warm air demand is not responded; if the temperature of the engine water is higher than the second preset temperature T2, a loop between the engine and the warm air is still opened, but the application number of the warm air heating devices is reduced.
In an eighth preferred embodiment of the present application, the present application further provides an engine cooling method for the engine cooling system in the fourth preferred embodiment. Referring to fig. 3, in this embodiment, the engine cooling method includes the steps of:
step S31, in the warm-up stage, if the water temperature of the engine is lower than a warm-up threshold value T1, closing a first valve between the engine and warm air, and gradually opening the first valve when the water temperature of the engine is higher than the warm-up threshold value T1 and a warm-up requirement exists; in detail, when the engine is in a warm-up stage, if the water temperature of the engine is lower than a warm-up threshold value T1, in order to reduce warm-up time, a first valve of a valve between the engine and warm air is closed, and when the water temperature of the engine is higher than the warm-up threshold value T1 and a warm-up demand exists, the first valve is gradually opened;
step S33, when the water temperature of the engine rises to a warming threshold value T1 and is lower than a second preset temperature T2, and a warm air demand exists, gradually opening a first valve between the engine and a warm air device to improve the warm air heat exchange efficiency;
step S35, when the water temperature of the engine is higher than a second preset temperature T2, opening a fourth valve, and if a warm air demand still exists, opening a first valve still to reduce the application number of warm air heating devices; in detail, when the water Temperature of the engine is greater than a second preset Temperature T2, the warm-up process is finished, the fourth valve of the radiator valve is opened, and for the warm air loop, if a warm air demand still exists, the 1 st valve is still opened, that is, the loop between the engine and the warm air is still opened, so that the application number of the warm air heating device is reduced, for example, the application of a warm air PTC (Positive Temperature Coefficient) is reduced, and the heat exchange efficiency is improved;
step S37, when the water temperature of the engine is higher than a third preset temperature T3, gradually opening a second valve; in detail, when the water temperature of the engine is higher than a third preset temperature T3, the second valve is gradually opened, that is, a loop between the cylinder body and the flow-adjustable device is gradually opened, so that the cylinder body is prevented from having an over-temperature risk;
step S39, when no warm air is required, closing the first valve; in detail, when no warm air is required, the first valve is closed, namely, a warm air loop is cut off under the condition of no warm air requirement, so that the pressure loss of the whole system is reduced, the power consumption of a water pump is reduced, and further the heat efficiency and the oil consumption of the engine are improved;
in a ninth preferred embodiment of the present application, there is provided a vehicle control system comprising: a memory, a processor, a communication bus, and an engine cooling program stored on the memory. The communication bus is used for realizing communication connection between the processor and the memory. The processor is configured to execute an engine cooling program stored on the memory to implement any of the engine cooling methods described above.
In a tenth preferred embodiment of the present application, there is provided a storage medium having an engine cooling program stored thereon, the engine cooling program, when executed by a processor, implementing any one of the engine cooling methods described above.
The invention leads the cylinder body and the cylinder cover of the engine to be cooled in a shunting way, adopts the flow adjustable device and the stepless water pump, and skillfully arranges the oil cooler and the water taking position of the warm air. The application of the split-flow cooling technology is part of the accurate heat management of the engine, and the water temperature of the cylinder body and the cylinder cover at different stages can be accurately controlled through the distribution calculation of the heat of the engine. The flow adjustable device and the electrodeless water pump are important means for realizing accurate heat management of the engine, different water pump rotating speeds provide flow for the whole cooling system as required, and different interfaces of the flow adjustable device are controlled to realize flow adjustment of different devices as required. The oil cooler at the rear end of the cylinder cover ingeniously solves the problem that the oil cooler maintains relatively high oil temperature in different stages including heating in a warming-up stage and after warming-up is finished. The arrangement of warm air at the rear end of the cylinder cover is ingenious, and the cooling liquid at the position does not pass through a radiator and has relatively high temperature, so that the mode can improve the heat exchange efficiency, improve the heat efficiency of the engine and reduce the oil consumption.
In conclusion, the engine cylinder body and the cylinder cover are cooled in a shunting manner, the connecting channel of the electrodeless water pump and the flow adjustable device is designed, and the circulation mode of the warm air and engine oil cooler device is designed, so that the accurate heat management of the engine is realized, the heat efficiency of the engine is improved, the oil consumption is reduced, and the purposes of energy conservation and emission reduction are further realized.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. An engine cooling system comprising a water tank (10) and a radiator (30), characterized in that:
an electrodeless water pump (20), a cylinder cover (42), a cylinder body (44) and a flow adjustable device (60) are arranged between the water tank (10) and the radiator (30);
a water inlet pipe (422) of the cylinder cover (42) and a water inlet pipe (442) of the cylinder body (44) are connected in parallel and are connected with a water outlet pipe (202) of the electrodeless water pump (20), and a water outlet pipe (424) of the cylinder cover (42) and a water outlet pipe (444) of the cylinder body (44) are connected in parallel with the flow adjustable device (60);
the water outlet pipe (424) of the cylinder cover (42) is provided with a first cylinder cover water outlet pipe (421) and a second cylinder cover water outlet pipe (423) which are connected with the water outlet pipe (444) of the cylinder body (44) in parallel, the first cylinder cover water outlet pipe (421) is provided with an engine oil cooler (82), and the tail ends of the first cylinder cover water outlet pipe (421) and the second cylinder cover water outlet pipe (423) are connected with the flow adjustable device (60).
2. The engine cooling system of claim 1, wherein: the water outlet pipe (424) of the cylinder cover (42) comprises a third cylinder cover water outlet pipe (425) connected with the first cylinder cover water outlet pipe (421) in parallel, warm air (84) is arranged on the third cylinder cover water outlet pipe (425), the third cylinder cover water outlet pipe (425) and the starting end of the second cylinder cover water outlet pipe (423) share the same section of pipeline, and the tail ends of the third cylinder cover water outlet pipe and the second cylinder cover water outlet pipe are connected with the flow adjustable device (60).
3. The engine cooling system according to claim 2, characterized in that: the flow adjustable device (60) is provided with a first water outlet pipe (602) and a second water outlet pipe (604), a small circulation passage (70) is arranged on the first water outlet pipe (602), a radiator (30) is arranged on the second water outlet pipe (604), and the tail ends of the first water outlet pipe (602) and the second water outlet pipe (604) share the same pipeline and are connected to the electrodeless water pump (20).
4. The engine cooling system of claim 3, wherein:
the flow adjustable device (60) is also provided with a first water inlet pipe (601), a second water inlet pipe (603) and a third water inlet pipe (605);
the first cylinder cover water outlet pipe (421) and the third cylinder cover water outlet pipe (425) are connected with the first water inlet pipe (601), the second cylinder cover water outlet pipe (423) is connected with the second water inlet pipe (603), and the water outlet pipe (444) of the cylinder body (44) is connected with the third water inlet pipe (605);
the warm air 84 is provided with a warm air inlet pipe (842), a first valve (52) is arranged on the warm air inlet pipe (842), a second valve (54) is arranged on the third inlet pipe (603), a third valve (56) is arranged on the first water outlet pipe (602), and a fourth valve (58) is arranged on the second water outlet pipe (604);
when the stepless water pump adopts different rotating speeds to provide flow for the engine cooling system as required, the flow adjustable device controls the on-off and flow of each branch through the first valve (52), the second valve (54), the third valve (56) and the fourth valve (58).
5. A vehicle characterized by having the engine cooling system of any one of claims 1 to 4.
6. An engine cooling method for an engine cooling system according to any one of claims 1 to 4, characterized in that, in a warm-up stage, the engine cooling method comprises the steps of: when the water temperature of the engine is lower than a third preset temperature T3, only the cylinder cover and the engine oil cooler are cooled; when the water temperature of the engine is higher than the third preset temperature T3, the cylinder cover and the engine oil cooler are cooled, and meanwhile, the cooling strength of the cylinder body is gradually enhanced.
7. The engine cooling method according to claim 6, characterized in that:
in the engine cooling system, the water outlet pipe (424) of the cylinder cover (42) comprises a third cylinder cover water outlet pipe (425) connected with the first cylinder cover water outlet pipe (421) in parallel, warm air (84) is arranged on the third cylinder cover water outlet pipe (425), the starting ends of the third cylinder cover water outlet pipe (425) and the second cylinder cover water outlet pipe (423) share the same section of pipeline, and the tail ends of the third cylinder cover water outlet pipe (425) and the second cylinder cover water outlet pipe (423) are connected to the flow adjustable device (60);
the engine cooling method further includes the steps of: when there is a demand for warm air, the engine cooling method includes the steps of: if the water temperature of the engine is higher than a warm-up threshold value T1 and lower than a second preset temperature T2, responding to a warm air demand; if the water temperature of the engine is lower than a warm-up threshold value T1, the warm air demand is not responded; if the temperature of the engine water is higher than the second preset temperature T2, a loop between the engine and the warm air is still opened, but the application number of the warm air heating devices is reduced.
8. The engine cooling method according to claim 6, characterized in that:
in the engine system, the flow adjustable device (60) is also provided with a first water inlet pipe (601), a second water inlet pipe (603) and a third water inlet pipe (605); the first cylinder cover water outlet pipe (421) and the third cylinder cover water outlet pipe (425) are connected with the first water inlet pipe (601), the second cylinder cover water outlet pipe (423) is connected with the second water inlet pipe (603), and the water outlet pipe (444) of the cylinder body (44) is connected with the third water inlet pipe (605); the warm air 84 is provided with a warm air inlet pipe (842), a first valve (52) is arranged on the warm air inlet pipe (842), a second valve (54) is arranged on the third inlet pipe (603), a third valve (56) is arranged on the first water outlet pipe (602), and a fourth valve (58) is arranged on the second water outlet pipe (604); when the stepless water pump adopts different rotating speeds to provide flow for the engine cooling system as required, the flow adjustable device controls the on-off and flow of each branch through the first valve (52), the second valve (54), the third valve (56) and the fourth valve (58);
the engine cooling method includes the steps of:
when the water temperature of the engine is lower than a warm-up threshold value T1, closing the first valve between the engine and the warm air, and gradually opening the first valve when the water temperature of the engine is higher than the warm-up threshold value T1 and a warm-up demand exists;
when the water temperature of the engine rises to a warming threshold value T1 and is lower than a second preset temperature T2 and warm air is required, gradually opening the first valve between the engine and the warm air device;
when the water temperature of the engine is higher than a second preset temperature T2, opening the fourth valve, and if a warm air demand still exists, opening the 1 st valve to reduce the application number of warm air heating devices;
when the water temperature of the engine is higher than a third preset temperature T3, gradually opening the second valve;
when there is no demand for warm air, the first valve is closed.
9. A vehicle control system characterized in that: the vehicle control system includes: a memory, a processor, a communication bus, and an engine cooling program stored on the memory;
the communication bus is used for realizing communication connection between the processor and the memory;
the processor is configured to execute an engine cooling program stored on the memory to implement the steps of the engine cooling method according to any one of claims 6 to 8.
10. A storage medium having stored thereon an engine cooling program which, when executed by a processor, implements an engine cooling method according to any one of claims 6 to 8.
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