CN114233459A - Engine cooling system and control method - Google Patents
Engine cooling system and control method Download PDFInfo
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- CN114233459A CN114233459A CN202111314540.3A CN202111314540A CN114233459A CN 114233459 A CN114233459 A CN 114233459A CN 202111314540 A CN202111314540 A CN 202111314540A CN 114233459 A CN114233459 A CN 114233459A
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- cooling system
- temperature
- engine cooling
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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
- F01P3/00—Liquid cooling
- F01P3/20—Cooling circuits not specific to a single part of engine or machine
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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
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
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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
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
- F01P5/12—Pump-driving arrangements
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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
- F01P7/162—Controlling of coolant flow the coolant being liquid by thermostatic control by cutting in and out of pumps
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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
- F01P7/164—Controlling of coolant flow the coolant being liquid by thermostatic control by varying pump speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
- F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
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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
- F01P2003/024—Cooling cylinder heads
-
- 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
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
- F01P2005/105—Using two or more pumps
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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
Abstract
The invention belongs to the technical field of engines, and particularly relates to an engine cooling system and a control method. The engine cooling system comprises a water pump group, a machine body, a cylinder cover and a thermostat, wherein the water pump group comprises a mechanical water pump and an air-driven water pump, the mechanical water pump and the air-driven water pump are arranged in parallel, liquid outlets of the mechanical water pump and the air-driven water pump are communicated with a liquid inlet of the machine body, a liquid outlet of the machine body is communicated with a liquid inlet of the cylinder cover, a liquid outlet of the cylinder cover is communicated with a first liquid inlet of the thermostat, and a first liquid outlet of the thermostat is communicated with a liquid inlet of the water pump group. Through using the engine cooling system among this technical scheme, water pump group is including the gas drive water pump, utilizes the gas of the gas holder of vehicle self-bring to drive the gas drive water pump for engine cooling system's part utilization rate has obtained the promotion, and the gas drive water pump sets up with mechanical water pump is parallelly connected, can increase the circulation of cooling water when the vehicle is high-speed or the engine shuts down.
Description
Technical Field
The invention belongs to the technical field of engines, and particularly relates to an engine cooling system and a control method.
Background
The primary operation of an engine cooling system is to dissipate heat into the air to prevent the engine from overheating. The engine in a vehicle operates best in a reasonably high temperature regime, and if the engine cools, wear of components can increase, thereby reducing engine efficiency and emitting more pollutants. Therefore, another important function of the engine cooling system is to warm up the engine as soon as possible and keep it at a constant temperature.
At present, a mechanical water pump is adopted in an engine cooling system, the mechanical water pump is required to be arranged for an engine according to rated point working conditions, the cooling capacity of the water pump is excessive under the condition of low speed and small load, energy waste is caused, and meanwhile, when the engine is stopped emergently, the mechanical pump does not have a power source, so that the engine cannot be cooled through water circulation, and the reliability and the operating efficiency of the engine are reduced. The other engine cooling system adopts an electronic water pump, can realize accurate control of the water temperature of the engine, but the electronic water pump is expensive and has complex control logic.
Disclosure of Invention
The object of the invention is to at least solve the problem of low operating efficiency of the engine cooling system. The purpose is realized by the following technical scheme:
a first aspect of the present invention provides an engine cooling system including:
the water pump set comprises a mechanical water pump and a gas-driven water pump, and the mechanical water pump and the gas-driven water pump are arranged in parallel;
the liquid outlets of the mechanical water pump and the gas-driven water pump are communicated with the liquid inlet of the machine body;
the liquid outlet of the machine body is communicated with the liquid inlet of the cylinder cover;
the liquid outlet of cylinder cap with the first inlet of temperature saver is linked together, the first liquid outlet of temperature saver with the inlet of water pump package is linked together.
Through using the engine cooling system among this technical scheme, adopt the water pump package, the organism, the integrated configuration of cylinder cap and thermostat, wherein water pump package is including the gas drive water pump, the gas that utilizes the gas holder of vehicle self-service drives the gas drive water pump, make engine cooling system's part utilization ratio obtain promoting, gas drive water pump and the parallelly connected setting of mechanical water pump simultaneously, can increase the circulation of cooling water when the vehicle is high-speed or the engine shuts down, can also adjust two water pumps in real time through control center, the reliability is promoted, the operating efficiency of engine is improved.
In addition, the engine cooling system according to the present invention may further have the following additional technical features:
in some embodiments of the invention, the outlet end of the mechanical water pump is provided with a first one-way valve.
In some embodiments of the invention, the outlet end of the gas-driven water pump is provided with a second one-way valve.
In some embodiments of the present invention, the engine cooling system further includes an air tank, a first inlet end of the air-driven water pump is communicated with the thermostat, a second inlet end of the air-driven water pump is communicated with the air tank, and a control valve is arranged between the second inlet end and the air tank and connected with a control center.
In some embodiments of the present invention, the engine cooling system further includes a radiator, the second liquid outlet of the thermostat is communicated with the liquid inlet of the radiator, and the liquid outlet of the radiator is communicated with the water pump set.
The invention also provides a control method of the engine cooling system, which is implemented according to the engine cooling system and comprises the following steps:
judging that the engine is in a load operation state according to the fact that the rotating speed of the engine is greater than zero;
judging that the engine is in a high-load operation state according to the fact that the oil consumption of the engine is larger than or equal to a first preset oil consumption;
and adjusting the rotating speed of the gas drive water pump to be the maximum rotating speed according to the fact that the high-load operation state reaches a first time value and the temperature of the engine coolant is greater than or equal to the starting temperature of the thermostat.
In some embodiments of the present invention, after determining that the engine is in the high-load operating state according to the engine oil consumption being greater than or equal to the first preset oil consumption, the method further includes:
and adjusting the rotating speed of the gas drive water pump to be half of the maximum rotating speed according to the condition that the high-load working state reaches a first time value and the temperature of the engine coolant is lower than the starting temperature of the thermostat.
In some embodiments of the present invention, after determining that the engine is in the load operation state according to the engine speed being greater than zero, the method further comprises:
judging that the engine is in a medium-low load state according to the condition that the oil consumption of the engine is smaller than a first preset oil consumption;
and controlling the gas drive water pump to operate according to the temperature of the engine coolant which is greater than or equal to a first preset temperature.
In some embodiments of the present invention, the determining that the engine is in the medium-low load state according to the engine oil consumption being less than the first preset oil consumption further comprises:
and controlling the gas drive water pump to stop working according to the condition that the temperature of the engine coolant is lower than the starting temperature of the thermostat.
In some embodiments of the present invention, the control method of the engine cooling system further includes:
judging that the engine is in an emergency stop state according to the fact that the rotating speed of the engine is equal to zero;
controlling the gas drive water pump to operate according to the fact that the temperature of the engine coolant is higher than the starting temperature of the thermostat;
and controlling the gas drive water pump to stop working according to the condition that the temperature of the engine coolant is lower than the starting temperature of the thermostat.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:
FIG. 1 schematically illustrates a structural schematic diagram of an engine cooling system according to an embodiment of the present invention;
FIG. 2 schematically shows a control flowchart in a high load state of an engine cooling system according to an embodiment of the present invention;
FIG. 3 schematically shows a control flowchart at a medium to low load condition of the engine cooling system according to the embodiment of the invention;
fig. 4 schematically shows a control flowchart in a stop state of the engine cooling system according to the embodiment of the present invention.
The reference numerals in the drawings denote the following:
10: water pump set, 11: gas drive water pump, 111: first check valve, 12: mechanical water pump, 121: a second one-way valve;
20: a body;
30: a cylinder cover;
40: a thermostat;
50: a heat sink;
60: an expansion tank;
71: EGR cooler, 72: an EGR valve.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Fig. 1 schematically shows a structural diagram of an engine cooling system according to an embodiment of the present invention. As shown in FIG. 1, the invention provides an engine cooling system and a control method. The engine cooling system comprises a water pump group 10, a machine body 20, a cylinder cover 30 and a thermostat 40, wherein the water pump group 10 comprises a mechanical water pump 12 and an air-driven water pump 11, the mechanical water pump 12 and the air-driven water pump 11 are arranged in parallel, liquid outlets of the mechanical water pump 12 and the air-driven water pump 11 are communicated with a liquid inlet of the machine body 20, a liquid outlet of the machine body 20 is communicated with a liquid inlet of the cylinder cover 30, a liquid outlet of the cylinder cover 30 is communicated with a first liquid inlet of the thermostat 40, and a first liquid outlet of the thermostat 40 is communicated with a liquid inlet of the water pump group 10.
Through using the engine cooling system among this technical scheme, adopt water pump assembly 10, organism 20, the integrated configuration of cylinder cap 30 and thermostat 40, wherein water pump assembly 10 includes gas drive water pump 11, the gas that utilizes the gas holder of vehicle self-carrying drives gas drive water pump 11, make engine cooling system's part utilization ratio obtain promoting, gas drive water pump 11 and mechanical water pump 12 parallelly connected setting simultaneously, can increase the circulation of cooling water when the vehicle is high-speed or the engine shuts down, can also adjust two water pumps in real time through control center, the reliability is promoted, the operating efficiency of engine is improved.
In some embodiments of the present invention, as shown in fig. 1, the liquid outlet end of the mechanical water pump 12 is provided with a first one-way valve 111. The first check valve 111 can ensure that the cooling liquid on the liquid path of the mechanical water pump 12 flows to the machine body 20 from the mechanical water pump 12, so that the cooling liquid flows in a single direction, and the reliability is improved.
In some embodiments of the present invention, as shown in fig. 1, the outlet end of the gas driven water pump 11 is provided with a second one-way valve 121. The second check valve 121 can ensure that the cooling liquid on the liquid path of the gas drive water pump 11 flows to the body 20 through the gas drive water pump 11, so that the cooling liquid flows in a single direction, and the reliability is improved.
In some embodiments of the present invention, the engine cooling system further includes an air tank, the first inlet end of the gas-driven water pump 11 is communicated with the thermostat 40, the second inlet end of the gas-driven water pump 11 is communicated with the air tank, and a control valve is arranged between the second inlet end of the gas-driven water pump 11 and the air tank, and the control valve is connected with the control center. The gas storage tank belongs to a part of a vehicle, and gas in the gas storage tank can be used for driving the gas drive water pump 11, so that the utilization rate of the gas storage tank is improved. In addition, the control valve can control whether the gas of the gas storage tank is introduced into the gas drive water pump 11 or not, so that whether the gas drive water pump 11 works or not is realized, and the reliability is improved. The control valve in the present embodiment is a check valve.
In some embodiments of the present invention, as shown in fig. 1, the engine cooling system further includes a radiator 50, the second liquid outlet of the thermostat 40 is communicated with the liquid inlet of the radiator 50, and the liquid outlet of the radiator 50 is communicated with the water pump set 10. The radiator 50 can protect the vehicle from damage and keep the engine within a proper temperature range, improving reliability.
Specifically, as shown in fig. 1, the EGR cooling unit is further included in the present embodiment, a liquid inlet end of the EGR cooling unit is connected in parallel with the cylinder head 30, the liquid inlet end of the EGR cooling unit is communicated with the engine body 20, and a liquid outlet end of the EGR cooling unit is communicated with the second liquid inlet of the thermostat 40. In addition, the EGR cooling group includes an EGR cooler 71 and an EGR valve 72, and the EGR cooler 71, the EGR valve 72, and the cylinder head 30 are provided in parallel.
Specifically, as shown in fig. 1, the present embodiment further includes an expansion tank 60, a first liquid inlet end of the expansion tank 60 is communicated with the EGR cooler 71, a second liquid inlet end of the expansion tank 60 is communicated with the radiator 50, and a liquid outlet end of the expansion tank 60 is communicated with the water pump set 10. The expansion tank 60 can buffer pressure fluctuations of the coolant in the engine cooling system, eliminate water hammer, and also perform an unloading function.
The present invention also provides a method for controlling an engine cooling system, as shown in fig. 2, implemented according to the engine cooling system, including:
judging that the engine is in a load operation state according to the fact that the rotating speed of the engine is greater than zero;
judging that the engine is in a high-load operation state according to the fact that the oil consumption of the engine is larger than or equal to a first preset oil consumption;
and adjusting the rotating speed of the gas drive water pump 11 to the maximum rotating speed according to the fact that the high-load working state reaches a first time value and the temperature of the engine coolant is greater than or equal to the starting temperature of the thermostat.
In some embodiments of the present invention, determining that the engine is in the high load operation state according to the fuel consumption of the engine being greater than or equal to the first preset fuel consumption further comprises:
and adjusting the rotating speed of the gas drive water pump 11 to be half of the maximum rotating speed according to the condition that the high-load working state reaches a first time value and according to the condition that the temperature of the engine coolant is lower than the starting temperature of the thermostat.
Specifically, in the present embodiment, when the engine is operating at a high load (i.e., when the engine oil consumption is greater than or equal to the first preset oil consumption), and the duration of the high engine load rate exceeds a certain time, the gas-driven water pump 11 starts to operate, and at this time, the control valve between the gas-driven water pump 11 and the air tank is opened, the gas-driven water pump 11 and the mechanical water pump 12 operate simultaneously, and the rotation speed of the gas-driven water pump 11 is the maximum rotation speed. When the temperature of the engine coolant is lower than the thermostat opening temperature, the rotation speed of the air-driven water pump 11 is adjusted to be half of the maximum rotation speed. When the temperature of the engine coolant is higher than or equal to the thermostat opening temperature, the rotation speed of the air-driven water pump 11 is adjusted to the maximum rotation speed.
In some embodiments of the present invention, as shown in fig. 3, after determining that the engine is in the load operation state according to the engine speed being greater than zero, the method further comprises:
judging that the engine is in a medium-low load state according to the condition that the oil consumption of the engine is smaller than a first preset oil consumption;
and controlling the gas drive water pump 11 to operate according to the temperature of the engine coolant which is more than or equal to the first preset temperature. The first predetermined temperature in this embodiment is the thermostat opening temperature plus about 5 ℃.
In some embodiments of the present invention, determining that the engine is in the medium-low load state further comprises, in response to the engine oil consumption being less than a first preset oil consumption:
and controlling the gas drive water pump 11 to stop working according to the condition that the temperature of the engine coolant is lower than the starting temperature of the thermostat.
Specifically, in the present embodiment, when the engine is operating at medium and low loads (the engine oil consumption is less than the first preset oil consumption), when the temperature of the coolant is lower than the thermostat opening temperature, the control valve between the air-drive water pump 11 and the air tank is closed, only the mechanical water pump 12 is operated, and the coolant does not flow through the air-drive water pump 11 by the second check valve 121. At this time, because the mechanical water pump 12 is a relatively small flow pump, the mechanical water pump 12 saves the mechanical energy of the engine under medium and low loads, thereby improving the economy of the engine. When the temperature of the coolant is higher than or equal to the first preset temperature (the first preset temperature in this embodiment is the thermostat opening temperature minus about 5 ℃), the gas drive water pump 11 starts to operate, wherein the rotation speed of the gas drive water pump 11 is positively correlated with the temperature of the coolant, and the specific rotation speed of the gas drive water pump 11 needs to be specifically analyzed and calculated according to the specific coolant temperature.
In some embodiments of the present invention, as shown in fig. 4, the control method of the engine cooling system further includes:
judging that the engine is in an emergency stop state according to the fact that the rotating speed of the engine is equal to zero;
controlling the gas drive water pump 11 to operate according to the fact that the temperature of the engine coolant is higher than the starting temperature of the thermostat;
and controlling the gas drive water pump 11 to stop working according to the condition that the temperature of the engine coolant is lower than the starting temperature of the thermostat.
Specifically, in the present embodiment, when the engine is stopped urgently (i.e., the engine speed is equal to zero), when the coolant temperature is greater than or equal to the thermostat opening temperature, the control valve between the air-drive water pump 11 and the air tank is opened, and the air-drive water pump 11 operates under the air pressure of the air tank. When the temperature of the cooling liquid is lower than the opening temperature of the thermostat, the control valve between the gas drive water pump 11 and the gas cylinder is closed, and the cooling circulation is finished, so that the reliability of the engine is ensured.
In the embodiment, the control method of the engine cooling system is implemented on the basis of the engine cooling system, and by comprehensively controlling the rotating speed value of the gas drive water pump 11 and the mechanical water pump 12, the cooling modes in the high load mode, the medium-low load mode and the parking mode can be respectively realized, the requirement of the engine on the cooling capacity is realized, the problem of energy waste of the mechanical water pump 12 is also solved, meanwhile, the problem of overhigh temperature of the engine caused by sudden parking is also avoided, and the efficiency and the reliability of the engine are improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An engine cooling system, comprising:
the water pump set comprises a mechanical water pump and a gas-driven water pump, and the mechanical water pump and the gas-driven water pump are arranged in parallel;
the liquid outlets of the mechanical water pump and the gas-driven water pump are communicated with the liquid inlet of the machine body;
the liquid outlet of the machine body is communicated with the liquid inlet of the cylinder cover;
the liquid outlet of cylinder cap with the first inlet of temperature saver is linked together, the first liquid outlet of temperature saver with the inlet of water pump package is linked together.
2. The engine cooling system of claim 1, wherein a first one-way valve is arranged at a liquid outlet end of the mechanical water pump.
3. The engine cooling system of claim 1, wherein a second one-way valve is arranged at a liquid outlet end of the gas-driven water pump.
4. The engine cooling system of claim 1, further comprising an air reservoir, wherein a first inlet of the air-driven water pump is in communication with the thermostat, a second inlet of the air-driven water pump is in communication with the air reservoir, and a control valve is disposed between the second inlet and the air reservoir and connected to a control center.
5. The engine cooling system of claim 1, further comprising a radiator, wherein the second liquid outlet of the thermostat is in communication with a liquid inlet of the radiator, and a liquid outlet of the radiator is in communication with the water pump set.
6. A control method of an engine cooling system, characterized in that the engine cooling system according to any one of claims 1 to 5 is implemented, comprising:
judging that the engine is in a load operation state according to the fact that the rotating speed of the engine is greater than zero;
judging that the engine is in a high-load operation state according to the fact that the oil consumption of the engine is larger than or equal to a first preset oil consumption;
and adjusting the rotating speed of the gas drive water pump to be the maximum rotating speed according to the fact that the high-load operation state reaches a first time value and the temperature of the engine coolant is greater than or equal to the starting temperature of the thermostat.
7. The control method of the engine cooling system according to claim 6, wherein the determining that the engine is in the high-load operating state according to the engine oil consumption being equal to or greater than a first preset oil consumption further comprises:
and adjusting the rotating speed of the gas drive water pump to be half of the maximum rotating speed according to the condition that the high-load working state reaches a first time value and the temperature of the engine coolant is lower than the starting temperature of the thermostat.
8. The control method of the engine cooling system according to claim 6, further comprising, after determining that the engine is in the load operation state based on the engine speed being greater than zero:
judging that the engine is in a medium-low load state according to the condition that the oil consumption of the engine is smaller than a first preset oil consumption;
and controlling the gas drive water pump to operate according to the temperature of the engine coolant which is greater than or equal to a first preset temperature.
9. The control method of the engine cooling system according to claim 8, wherein the determining that the engine is in the medium-low load state according to the engine oil consumption being less than the first preset oil consumption further comprises:
and controlling the gas drive water pump to stop working according to the condition that the temperature of the engine coolant is lower than the starting temperature of the thermostat.
10. The control method of an engine cooling system according to claim 6, characterized in that the control method of an engine cooling system further comprises:
judging that the engine is in an emergency stop state according to the fact that the rotating speed of the engine is equal to zero;
controlling the gas drive water pump to operate according to the fact that the temperature of the engine coolant is higher than the starting temperature of the thermostat;
and controlling the gas drive water pump to stop working according to the condition that the temperature of the engine coolant is lower than the starting temperature of the thermostat.
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| CN202111314540.3A CN114233459B (en) | 2021-11-08 | 2021-11-08 | Engine cooling system and control method |
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