CN111188681A - Engine cooling system and control method - Google Patents
Engine cooling system and control method Download PDFInfo
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- CN111188681A CN111188681A CN201911403516.XA CN201911403516A CN111188681A CN 111188681 A CN111188681 A CN 111188681A CN 201911403516 A CN201911403516 A CN 201911403516A CN 111188681 A CN111188681 A CN 111188681A
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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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Abstract
The invention belongs to the technical field of engines, and particularly relates to an engine cooling system and a control method thereof. According to the engine cooling system provided by the embodiment of the invention, when the first cooling system and the second cooling system work normally, the two sides of the engine are cooled respectively, and when any one of the first cooling system and the second cooling system is abnormal, the abnormal cooling system and the normal cooling system share the cooling liquid, so that the engine can run normally, and the risk resistance and the reliability of the engine are improved.
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
This section provides background information related to the present disclosure only and is not necessarily prior art.
The engine for the power generation or ship and airplane market has large power and high requirement on the reliability of the engine, and particularly in some emergency situations, the diesel engine cannot be stopped to provide power for ships or hospitals so as to deal with the emergency situations.
For a V-type engine, a water pump is provided on each side of the engine for cooling. To this kind of setting mode, when one of them side water pump is unusual, the water pump flow reduces, reduces to zero even for this side engine can't be cooled off, causes both sides cooling inhomogeneous, appears the problem that the engine pulled the jar, shut down even, unable normal work.
Disclosure of Invention
The invention aims to at least solve the problem that the cooling system on one side of an engine cannot work normally due to abnormality. The purpose is realized by the following technical scheme:
a first aspect of the present invention provides an engine cooling system for cooling an engine, comprising:
a first cooling system;
the first cooling system and the second cooling system are respectively arranged on two sides of the engine;
a connection pipe through which the first cooling system and the second cooling system communicate with each other with a common cooling liquid.
According to the engine cooling system provided by the embodiment of the invention, in a normal state, the first cooling system and the second cooling system are respectively filled with the cooling liquid, the first cooling system and the second cooling system respectively cool the two sides of the engine, so that the engine can normally run, when any one of the first cooling system and the second cooling system is abnormal, the first cooling system and the second cooling system are communicated, the cooling liquid filled into the normally working cooling system can enter the abnormal cooling system, so that the abnormal cooling system has the cooling capacity, the two cooling systems share the cooling liquid, the two sides of the engine can still be uniformly cooled, the engine can normally run, the wind risk resistance and the running reliability of the engine are improved, and the problems of cylinder pulling and stopping of the engine are avoided.
In addition, the engine cooling system according to the embodiment of the invention may further have the following additional technical features:
in some embodiments of the invention, the engine cooling system further comprises a radiator, the first cooling system comprising:
the first water inlet path is connected with the radiator and the engine, and a first water pump, a first pressure sensor and a first valve are sequentially arranged on the first water inlet path along the direction of the radiator pointing to the engine;
the second cooling system includes:
the second water inlet path is connected with the radiator and the engine, and a second water pump, a second pressure sensor and a second valve are sequentially arranged on the second water inlet path along the direction of the radiator pointing to the engine;
wherein a position between the first valve and the engine on the first water inlet path and a position between the second valve and the engine on the second water inlet path are communicated through the connecting pipe.
In some embodiments of the invention, the first cooling system further comprises:
the first water outlet path is connected with the radiator and the engine, and a first temperature sensor is arranged on the first water outlet path;
the second cooling system further includes:
and the second water outlet path is connected with the radiator and the engine, and a second temperature sensor is arranged on the second water outlet path.
In some embodiments of the present invention, the engine cooling system further comprises a controller, and the first valve, the second valve, the first pressure sensor, the second pressure sensor, the first temperature sensor, and the second temperature sensor are all electrically connected to the controller.
In some embodiments of the invention, the first valve is a one-way valve or a solenoid valve and/or the second valve is a one-way valve or a solenoid valve.
The second aspect of the invention also provides a control method of an engine cooling system, including:
judging whether the engine cooling system is abnormal or not;
according to the abnormality of a first cooling system of the engine cooling system, stopping introducing the cooling liquid into the first cooling system, and controlling part of the cooling liquid in the second cooling system to be introduced into the first cooling system;
and stopping the introduction of the cooling liquid into a second cooling system of the engine cooling system according to the abnormality of the second cooling system, and controlling part of the cooling liquid in the first cooling system to be introduced into the second cooling system.
According to the control method of the engine cooling system provided by the invention, the engine cooling system comprises a first cooling system and a second cooling system, under the normal state, cooling liquid is respectively introduced into the first cooling system and the second cooling system, the first cooling system and the second cooling system respectively cool two sides of the engine to enable the engine to normally run, whether the engine cooling system is abnormal or not is judged, when the first cooling system is abnormal, the supply of the cooling liquid of the first cooling system is stopped, the cooling liquid is continuously introduced into the second cooling system, the second cooling system is controlled to be communicated with the first cooling system and share the cooling liquid, the two cooling systems can still uniformly cool the two sides of the engine to enable the engine to normally run, when the second cooling system is abnormal, the supply of the cooling liquid of the second cooling system is stopped, and continuously introducing the cooling liquid into the first cooling system, controlling the first cooling system to be communicated with the second cooling system and share the cooling liquid, and uniformly cooling the two sides of the engine by sharing the cooling liquid, so that the engine can normally run, the risk resistance and the running reliability of the engine are improved, and the problems of cylinder scuffing and shutdown of the engine are avoided.
In some embodiments of the present invention, the determining whether the first cooling system and the second cooling system are abnormal includes:
acquiring a first pressure value in a first water inlet channel of the first cooling system;
judging that the first cooling system is abnormal according to the fact that the first pressure value is smaller than a first preset value;
acquiring a second pressure value in a second water inlet circuit of the second cooling system;
and judging that the second cooling system is abnormal according to the fact that the second pressure value is smaller than a second preset value.
In some embodiments of the present invention, the stopping of the supply of the cooling liquid to the first cooling system and the controlling of the supply of the part of the cooling liquid in the second cooling system to the first cooling system according to the abnormality of the first cooling system comprises:
and controlling a first valve in the first cooling system to close and stop introducing the cooling liquid into the first cooling system according to the abnormality of the first cooling system, and controlling part of the cooling liquid in the second cooling system to introduce into the first cooling system.
In some embodiments of the present invention, the stopping the supply of the cooling liquid to the second cooling system according to the abnormality of the second cooling system, and controlling the supply of the part of the cooling liquid in the first cooling system to the second cooling system includes:
and controlling a second valve in the second cooling system to close and stop the supply of the cooling liquid to the second cooling system according to the abnormality of the second cooling system, and controlling part of the cooling liquid in the first cooling system to supply to the second cooling system.
In some embodiments of the invention, the method of controlling the engine cooling system further comprises controlling the power of the engine to match the cooling capacities of the first cooling system and the second cooling system;
the controlling the power of the engine to match the cooling capacities of the first cooling system and the second cooling system includes:
the controlling the power of the engine to match the cooling capacities of the first cooling system and the second cooling system includes:
acquiring real-time rotating speed and real-time power of an engine;
acquiring a first temperature value of a first water outlet channel of the first cooling system;
calculating the rotating speed and power matched with the engine according to the first pressure value and the first temperature value;
and controlling the engine to operate according to the calculated rotating speed and power.
Or acquiring the real-time rotating speed and real-time power of the engine;
acquiring a second temperature value of a second water outlet channel of the second cooling system;
calculating the rotating speed and power matched with the engine according to the second pressure value and the second temperature value;
and controlling the engine to operate according to the calculated rotating speed and power.
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 reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic structural diagram of an engine cooling system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an anomaly of the first cooling system shown in FIG. 1;
FIG. 3 is a schematic diagram of an anomaly of the second cooling system shown in FIG. 2;
FIG. 4 is a flowchart illustrating a method of controlling an engine cooling system according to an embodiment of the present invention;
FIG. 5 is a schematic flow chart of the method for determining whether the first cooling system and the second cooling system are abnormal shown in FIG. 4;
FIG. 6 is a flowchart showing a second cooling system abnormality in matching the power of the engine with the cooling capacities of the first cooling system and the second cooling system in the control method of the engine cooling system shown in FIG. 4;
fig. 7 is a flowchart illustrating a first cooling system abnormality in matching the power of the engine with the cooling capacities of the first cooling system and the second cooling system in the control method of the engine cooling system shown in fig. 4.
Reference numerals:
1. a first cooling system; 11. a first water inlet path; 12. a first water outlet path; 13. a third water outlet path; 111. a first water pump; 112. a first pressure sensor; 113. a first valve; 121. a first temperature sensor; 122. a first thermostat;
2. a second cooling system; 21. a second water inlet path; 22. a second water outlet path; 23. a fourth waterway; 211. a second water pump; 212. a second pressure sensor; 213. a second valve; 221. a second temperature sensor; 222. a second thermostat;
3. a connecting pipe;
4. an engine;
5. a heat sink.
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.
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.
As shown in fig. 1 to 3, an engine cooling system according to an embodiment of the present invention for cooling an engine includes:
a first cooling system 1;
the second cooling system 2, the first cooling system 1 and the second cooling system 2 are respectively arranged at two sides of the engine 4;
the connection pipe 3, the first cooling system 1 and the second cooling system 2 communicate a common coolant with each other through the connection pipe 3.
According to the engine cooling system of the embodiment of the invention, arrows in the figure are the flowing directions of the cooling liquid, under the normal state, the cooling liquid is respectively introduced into the first cooling system 1 and the second cooling system 2, the first cooling system 1 and the second cooling system 2 respectively cool two sides of the engine 4, so that the engine 4 normally operates, when any one of the first cooling system 1 and the second cooling system 2 is abnormal, because the first cooling system 1 and the second cooling system 2 are communicated, the cooling liquid introduced into the normally operating cooling system can enter the abnormal cooling system, so that the abnormal cooling system has the cooling capacity, the two cooling systems share the cooling liquid, the two sides of the engine 4 can be uniformly cooled, the engine 4 can normally operate, and the risk resistance and the operation reliability of the engine 4 are improved, the problems of cylinder pulling and stopping of the engine 4 are avoided.
In some embodiments of the present invention, the engine cooling system further includes a radiator 5, the radiator 5 dissipates heat carried by the cooling liquid, so that the cooling liquid is continuously circulated and used, as shown in fig. 2 (where a dashed arrow line indicates a flow direction of the cooling liquid), the first cooling system 1 includes a first water inlet channel 11, a first water pump 111, a first pressure sensor 112 and a first valve 113 are sequentially disposed on the first water inlet channel 11 along a direction in which the radiator 5 points to the engine 4, the first water pump 111 serves as a power component, so as to circulate the cooling liquid and pressurize the cooling liquid, the first pressure sensor 112 is used to detect whether the first cooling system 1 is abnormal, the first pressure sensor 112 is used to detect a water pressure in the first water inlet channel 11, the first pressure sensor is used to determine whether the first cooling system is abnormal according to a magnitude relationship between the detected value and a standard pressure, the standard pressure is the water pressure in the first water inlet channel 11 when the first cooling system 1 is in a normal operating state, the standard pressure can be obtained through experiments before the product is offline, when the first pressure sensor 112 detects that the pressure in the first water inlet channel 11 is greater than or equal to the standard pressure, it indicates that the first cooling system 1 is in a normal operating state, when the first pressure sensor 112 detects that the pressure in the first water inlet channel 11 is less than the standard pressure, it indicates that the first cooling system 1 is in an abnormal state, as shown in fig. 3 (wherein, a dotted arrow line indicates the flow direction of the cooling liquid), the second cooling system 2 includes a second water inlet channel 21, a second water pump 211, a second pressure sensor 212 and a second valve 213 are sequentially arranged on the second water inlet channel 21 along the direction of the radiator 5 pointing to the engine 4, the second water pump 211 is used as a power component to realize the flow circulation of the cooling liquid and pressurize the cooling liquid, and whether the second cooling system 2 is abnormal or not can be detected by the second pressure sensor 212, detecting the water pressure in the second water inlet channel 21 according to the second pressure sensor 212, determining whether the water pressure is abnormal according to the magnitude relation between the detected value and a standard pressure, wherein the standard pressure is the water pressure in the second water inlet channel 21 when the second cooling system 2 is in a normal working state, the standard pressure can be obtained through experiments before products are off line, when the second pressure sensor 212 detects that the pressure in the second water inlet channel 21 is greater than or equal to the standard pressure, the second cooling system 2 is in the normal working state, when the second pressure sensor 212 detects that the pressure in the second water inlet channel 21 is smaller than the standard pressure, the second cooling system 2 is in an abnormal state, when the first cooling system 1 is in the abnormal state, the first valve 113 is closed, the position between the first valve 113 and the engine 4 and the position between the second valve 213 and the engine 4 are communicated through the connecting pipe 3, and the cooling liquid in the second cooling system 2 enters the first cooling system 1 through the connecting pipe 3, namely the second water inlet The coolant in the water channel 21 enters the first water inlet channel 11 through the connecting pipe 3 to realize uniform cooling of two sides of the engine 4, and similarly, when the second cooling system 2 is in an abnormal state, the second valve 213 is closed, the position between the second valve 213 and the engine 4 and the position between the first valve 113 and the engine 4 are communicated through the connecting pipe 3, the coolant in the first cooling system 1 enters the second cooling system 2 through the connecting pipe 3, that is, the coolant in the first water inlet channel 11 enters the second water inlet channel 21 through the connecting pipe 3 to realize uniform cooling of two sides of the engine 4.
In some embodiments of the present invention, the connection pipe 3 may be configured to be always in a communication state, and may also be configured with a valve, when the first cooling system 1 and the second cooling system 2 are in a normal operation state, the valve is closed, the first cooling system 1 and the second cooling system 2 are not in communication with each other, and both are in independent operation states, when one of the cooling systems is abnormal, the valve is opened, and the first cooling system 1 and the second cooling system 2 are in communication with each other to share a cooling liquid, and in one embodiment, the connection pipe 3 is always in a communication state, which simplifies the structure.
The connecting part of the connecting pipe 3 and the first cooling system 1 and the second cooling system 2 are connected in a sealing manner, so that leakage of cooling liquid is prevented.
In some embodiments of the present invention, in addition to the above-mentioned first pressure sensor 112 and second pressure sensor 212 as the determination of whether the first cooling system 1 and second cooling system 2 are abnormal, the temperature of the coolant after cooling the engine 4 may be determined, the first cooling system 1 includes a first water outlet path 12, the first water outlet path 12 connects the radiator 5 and the engine 4, that is, the first water outlet path 12 and the first water inlet path 11 are connected in parallel to the radiator 5 and the engine 4, the first water outlet path 12 is provided with a first temperature sensor 121, the temperature of the coolant in the first water outlet path 12 may be detected by the first temperature sensor 121, whether the cooling system is abnormal or not is determined according to the magnitude relationship between the detected value and the standard temperature, and whether the cooling capacity of the cooling system can meet the requirement of the engine 4 or not is also determined, when the first temperature sensor 121 detects that the temperature of the coolant in the first water outlet path 12 is greater than or equal to the standard temperature, when the first cooling system 1 is in a normal working state, and the first temperature sensor 121 detects that the temperature of the coolant in the first water outlet path 12 is lower than a standard temperature, it indicates that the first cooling system 1 is in an abnormal state, the second cooling system 2 includes a second water outlet path 22, the second water outlet path 22 connects the radiator 5 and the engine 4, that is, the second water outlet path 22 and the second water inlet path 21 are connected in parallel to the radiator 5 and the engine 4, the second water outlet path 22 is provided with a second temperature sensor 221, the temperature of the coolant in the second water outlet path 22 can be detected by the second temperature sensor 221, it is determined whether the cooling system is abnormal according to the magnitude relation between the detected value and the standard temperature, it can also be determined whether the cooling capacity of the cooling system can meet the requirement of the engine 4, and when the second temperature sensor 221 detects that the temperature of the coolant in the second water outlet path 22 is higher than or equal to the, when the second temperature sensor 221 detects that the temperature of the coolant in the second water outlet channel 22 is lower than the standard temperature, it indicates that the second cooling system 2 is in an abnormal state, the first temperature sensor 121 and the first pressure sensor 112 determine whether the first cooling system 1 is abnormal, and the second temperature sensor 221 and the second pressure sensor 212 determine whether the second cooling system 2 is abnormal, so that the accuracy of the determination is improved, and errors caused by single detection are avoided.
Wherein, as shown in fig. 2 (wherein, the dashed arrow line indicates the flow direction of the cooling liquid), the first water inlet channel 11 and the first water outlet channel 12 are used as a large circulation for cooling one side of the engine 4, the first cooling system 1 further comprises a third water outlet channel 13, the third water outlet channel 13 is connected with the first water outlet channel 12 through a first thermostat 122, a small circulation for cooling is realized through the third water outlet channel 13, when the temperature of the cooling liquid is higher after the cooling is finished, the large circulation is carried out, the heat carried by the cooling liquid is rapidly dissipated through the radiator 5, when the temperature of the cooling liquid is lower after the cooling is finished, the small circulation is carried out, different circulations are selected according to the temperature of the cooling liquid, the reflux speed of the cooling liquid is increased, the selection of the large circulation and the small circulation is realized by sensing the temperature of the cooling liquid through the first thermostat 122, and the same is also shown in fig. 3 (wherein, the dashed arrow line indicates the flow direction of the cooling liquid), the second water inlet channel 21 and the second water outlet channel 22 are used as a large circulation for cooling the other side of the engine 4, the second cooling system 2 further comprises a fourth water outlet channel 23, the fourth water outlet channel 23 is connected with the second water outlet channel 22 through a second thermostat 222, a small circulation for cooling is realized through the fourth water outlet channel 23, the large circulation is carried out when the temperature of the cooling liquid is high after the cooling liquid is cooled, heat carried by the cooling liquid is rapidly dissipated through the radiator 5, the small circulation is carried out when the temperature of the cooling liquid is low after the cooling liquid is cooled, different circulations are selected according to the temperature of the cooling liquid, the backflow speed of the cooling liquid is increased, and the selection of the large circulation and the small circulation is realized by sensing the temperature of the cooling liquid through the second thermostat 222.
In some embodiments of the present invention, the opening and closing of the first valve 113 and the second valve 213 can be manually performed or can be set to be automatic, and in one embodiment, the opening and closing of the first valve 113 and the second valve 213 can be set to be automatic, and the accuracy of the response is improved, the engine cooling system further includes a controller, the first valve 113, the second valve 213, the first pressure sensor 112, the second pressure sensor 212, the first temperature sensor 121, and the second temperature sensor 221 are all electrically connected to the controller, the first pressure sensor 112, the second pressure sensor 212, the first temperature sensor 121, and the second temperature sensor 221 respectively send the detection values to the controller, the controller logically determines whether the first cooling system 1 and the second cooling system 2 are abnormal or not, when the first cooling system 1 is abnormal, the controller controls the first valve 113 to close, when the second cooling system 2 is abnormal, the controller controls the second valve 213 to close.
The controller is an ECU (Electronic Control Unit) of the engine 4.
In some embodiments of the present invention, the first valve 113 is a one-way valve or a solenoid valve, and/or the second valve 213 is a one-way valve or a solenoid valve, and in one embodiment, the first valve 113 and the second valve 213 are both one-way valves, which only allow one-way passage of the cooling fluid.
As shown in fig. 4 to 7, a control method of an engine cooling system according to another embodiment of the present invention includes:
judging whether the engine cooling system is abnormal or not;
according to the abnormality of the first cooling system 1 of the engine cooling system, stopping introducing the cooling liquid into the first cooling system 1, and controlling part of the cooling liquid in the second cooling system 2 to be introduced into the first cooling system 1;
and stopping the supply of the cooling liquid to the second cooling system 2 according to the abnormality of the second cooling system 2 of the engine cooling system, and controlling part of the cooling liquid in the first cooling system 1 to be supplied to the second cooling system 2.
According to a control method of an engine cooling system provided by the invention, the engine cooling system comprises a first cooling system 1 and a second cooling system 2, as shown in fig. 1 (wherein, the solid line arrow indicates the flow direction of the cooling liquid), under a normal state, the cooling liquid is respectively introduced into the first cooling system 1 and the second cooling system 2, the first cooling system 1 and the second cooling system 2 respectively cool two sides of the engine 4, so that the engine 4 normally operates, and by judging whether the engine cooling system is abnormal or not, as shown in fig. 2 (wherein, the solid line arrow indicates the flow direction of the cooling liquid), when the first cooling system 1 is abnormal, the supply of the cooling liquid of the first cooling system 1 is stopped, the cooling liquid is continuously introduced into the second cooling system 2, the second cooling system 2 is controlled to be communicated with the first cooling system 1 and share the cooling liquid, the two coolant liquid are shared, so that both sides of the engine 4 can be uniformly cooled, and the engine 4 can normally operate, as shown in fig. 3 (wherein, the solid line arrow line represents the flow direction of the coolant liquid), when the second cooling system 2 is abnormal, the supply of the coolant liquid of the second cooling system 2 is stopped, the coolant liquid is continuously introduced into the first cooling system 1, the first cooling system 1 and the second cooling system 2 are controlled to be communicated and share the coolant liquid, and the two coolant liquid are shared, so that both sides of the engine 4 can be uniformly cooled, the engine 4 can normally operate, the risk resistance and the operation reliability of the engine 4 are improved, and the problems of cylinder pulling and stopping of the engine 4 are avoided.
In some embodiments of the present invention, the determination of whether the first cooling system 1 is abnormal is performed by determining the water pressure in the first cooling system 1, obtaining a first pressure value of the first water inlet channel 11 of the first cooling system 1, determining according to a magnitude relationship between the first pressure value and a first preset value, when the first pressure value is greater than or equal to the first preset value, the first cooling system 1 is in a normal operating state, when the first pressure value is smaller than the first preset value, the first cooling system 1 is in an abnormal state, the obtaining of the first pressure value can be detected by a sensor, the first preset value can be obtained by performing an experiment before a product is taken off line, and the determination of whether the second cooling system 2 is abnormal is performed by determining the water pressure in the second cooling system 2, obtaining a second pressure value of the second water inlet channel 21 of the second cooling system 2, determining according to a magnitude relationship between the second pressure value and the second preset value, when the second pressure value is greater than or equal to the second preset value, the second cooling system 2 is in a normal working state, when the second pressure value is smaller than the second preset value, the second cooling system 2 is in an abnormal state, the second pressure value can be obtained through detection of a sensor, and the second preset value can be obtained through experiments before products are taken off line.
The obtaining of the first pressure value and the second pressure value, the magnitude relation between the first pressure value and the first preset value, and the magnitude relation between the second pressure value and the second preset value may be implemented by a controller, and the controller is an ECU of the engine 4.
In some embodiments of the present invention, after determining that the first cooling system 1 is abnormal through the pressure value, the coolant stops being introduced into the first cooling system 1, the coolant cannot enter the first water inlet channel 11 by closing the first valve 113 in the first cooling system 1, the coolant in the second cooling system 2 enters the first cooling system 1 through the connecting pipe 3 by the connecting pipe 3, and the first cooling system 1 and the second cooling system 2 share the coolant, so that the first cooling system 1 can continue to cool the engine 4.
The connecting pipe 3 may be set to always maintain a communication state, and may also be provided with a valve, when the first cooling system 1 and the second cooling system 2 are in a normal working state, the valve is closed, the first cooling system 1 and the second cooling system 2 are not communicated with each other, and both are in independent working states, when one of the cooling systems is abnormal, the control valve is opened, and the first cooling system 1 and the second cooling system 2 are communicated with each other to share the cooling liquid, in an embodiment, the connecting pipe 3 is always in a communication state, thereby reducing control logic and simplifying a structure.
In some embodiments of the present invention, after determining that the second cooling system 2 is abnormal through the pressure value, the coolant stops being introduced into the second cooling system 2, the coolant cannot enter the second water inlet channel 21 by closing the second valve 213 in the second cooling system 2, the coolant in the first cooling system 1 enters the second cooling system 2 through the connecting pipe 3, and the second cooling system 2 and the first cooling system 1 share the coolant, so that the second cooling system 2 can continue to cool the engine 4.
In some embodiments of the present invention, when an abnormality occurs in any one of the first cooling system 1 and the second cooling system 2, the first cooling system 1 and the second cooling system 2 share the coolant, and although both sides of the engine 4 can still be cooled, the coolant distributed by the first cooling system 1 and the second cooling system 2 is reduced by half compared with that in a normal operation state, that is, the cooling capacities of the first cooling system 1 and the second cooling system 2 are reduced, in order to ensure that the engine 4 can normally operate, the engine 4 needs to be operated with reduced power, the requirement of the engine 4 for cooling is matched with the cooling capacities of the first cooling system 1 and the second cooling system 2, the control method for the engine cooling system further comprises controlling the power of the engine 4 to be matched with the cooling capacities of the first cooling system 1 and the second cooling system 2, the matching refers to matching the power of the engine with the cooling capacity after an abnormality occurs in the second cooling system 2 in the engine cooling system or matching the cooling capacity after an abnormality occurs in the first cooling system 1 in the engine cooling system, as shown in fig. 6, when an abnormality occurs in the second cooling system 2, the introduction of the coolant into the second cooling system 2 is stopped, a part of the coolant in the first cooling system 1 is introduced into the second cooling system 2, firstly, the real-time rotation speed and the real-time power of the engine 4 are obtained, at this time, the requirement of the engine 4 for cooling is greater than the cooling capacities of the first cooling system 1 and the second cooling system 2, then, the first temperature value of the coolant in the first water outlet channel 12 of the first cooling system 1 is obtained, and then, in combination with the first pressure value obtained in the foregoing, the rotation speed and the power of the engine 4 matching the current cooling capacities of the first cooling system 1 and the second cooling system 2 are calculated, after the calculation is completed, controlling the engine 4 to operate according to the calculated rotating speed and power, so as to realize closed-loop control of the rotating speed and power of the engine 4, as shown in fig. 7, when the first cooling system 1 is abnormal, stopping introducing the coolant into the first cooling system 1, introducing a part of the coolant in the second cooling system 2 into the first cooling system 1, firstly obtaining the real-time rotating speed and real-time power of the engine 4, at this time, the requirement of the engine 4 on cooling is greater than the cooling capacities of the first cooling system 1 and the second cooling system 2, then obtaining a second temperature value of the coolant in a second water outlet channel 22 of the second cooling system 2, and combining the obtained second pressure value, calculating the rotating speed and power of the engine 4 which are matched with the cooling capacities of the current second cooling system 2 and the first cooling system 1, after the calculation is completed, controlling the engine 4 to operate according to the calculated rotating speed and power, closed loop control of the speed and power of the engine 4 is achieved.
The acquisition of the real-time rotating speed and the real-time power of the engine 4, the acquisition of the first temperature value and the second temperature value, the acquisition of the first pressure value and the second pressure value, and the calculation of the rotating speed and the power are completed through a controller, and the controller is an ECU (electronic control unit) of the engine 4.
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 also 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 for cooling an engine, comprising:
a first cooling system;
the first cooling system and the second cooling system are respectively arranged on two sides of the engine;
a connection pipe through which the first cooling system and the second cooling system communicate with each other with a common cooling liquid.
2. The engine cooling system of claim 1, further comprising a radiator, the first cooling system comprising:
the first water inlet path is connected with the radiator and the engine, and a first water pump, a first pressure sensor and a first valve are sequentially arranged on the first water inlet path along the direction of the radiator pointing to the engine;
the second cooling system includes:
the second water inlet path is connected with the radiator and the engine, and a second water pump, a second pressure sensor and a second valve are sequentially arranged on the second water inlet path along the direction of the radiator pointing to the engine;
wherein a position between the first valve and the engine on the first water inlet path and a position between the second valve and the engine on the second water inlet path are communicated through the connecting pipe.
3. The engine cooling system of claim 2, wherein the first cooling system further comprises:
the first water outlet path is connected with the radiator and the engine, and a first temperature sensor is arranged on the first water outlet path;
the second cooling system further includes:
and the second water outlet path is connected with the radiator and the engine, and a second temperature sensor is arranged on the second water outlet path.
4. The engine cooling system of claim 3, further comprising a controller, the first valve, the second valve, the first pressure sensor, the second pressure sensor, the first temperature sensor, and the second temperature sensor all electrically connected to the controller.
5. Engine cooling system according to claim 2, characterized in that the first valve is a one-way valve or a solenoid valve and/or the second valve is a one-way valve or a solenoid valve.
6. A control method of an engine cooling system, characterized by comprising:
judging whether the engine cooling system is abnormal or not;
according to the abnormality of a first cooling system of the engine cooling system, stopping introducing the cooling liquid into the first cooling system, and controlling part of the cooling liquid in the second cooling system to be introduced into the first cooling system;
and stopping the introduction of the cooling liquid into a second cooling system of the engine cooling system according to the abnormality of the second cooling system, and controlling part of the cooling liquid in the first cooling system to be introduced into the second cooling system.
7. The engine cooling system control method according to claim 6, characterized in that the determining whether the first cooling system and the second cooling system are abnormal includes:
acquiring a first pressure value in a first water inlet channel of the first cooling system;
judging that the first cooling system is abnormal according to the fact that the first pressure value is smaller than a first preset value;
acquiring a second pressure value in a second water inlet circuit of the second cooling system;
and judging that the second cooling system is abnormal according to the fact that the second pressure value is smaller than a second preset value.
8. The engine cooling system control method according to claim 6, wherein the stopping of the supply of the coolant to the first cooling system in accordance with the abnormality of the first cooling system, and the controlling of the supply of a part of the coolant in the second cooling system to the first cooling system includes:
and controlling a first valve in the first cooling system to close and stop introducing the cooling liquid into the first cooling system according to the abnormality of the first cooling system, and controlling part of the cooling liquid in the second cooling system to introduce into the first cooling system.
9. The engine cooling system control method according to claim 6, wherein the stopping of the supply of the coolant to the second cooling system in accordance with the abnormality of the second cooling system, and controlling the supply of a part of the coolant in the first cooling system to the second cooling system includes:
and controlling a second valve in the second cooling system to close and stop the supply of the cooling liquid to the second cooling system according to the abnormality of the second cooling system, and controlling part of the cooling liquid in the first cooling system to supply to the second cooling system.
10. The control method of an engine cooling system according to claim 7, characterized in that the control method of an engine cooling system further comprises controlling the power of the engine to match the cooling capacities of the first cooling system and the second cooling system;
the controlling the power of the engine to match the cooling capacities of the first cooling system and the second cooling system includes:
acquiring real-time rotating speed and real-time power of an engine;
acquiring a first temperature value of a first water outlet channel of the first cooling system;
calculating the rotating speed and power matched with the engine according to the first pressure value and the first temperature value;
and controlling the engine to operate according to the calculated rotating speed and power.
Or acquiring the real-time rotating speed and real-time power of the engine;
acquiring a second temperature value of a second water outlet channel of the second cooling system;
calculating the rotating speed and power matched with the engine according to the second pressure value and the second temperature value;
and controlling the engine to operate according to the calculated rotating speed and power.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113494347A (en) * | 2021-08-09 | 2021-10-12 | 一汽解放汽车有限公司 | Control method of engine cooling system and engine cooling system |
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