Engine cylinder liner cooling temperature control device and control method

Abstract

The application discloses an engine cylinder liner cooling temperature control device and a control method, wherein the device comprises a shell, a control unit and a parameter detection unit, the shell is provided with a first electric control reversing valve and a second electric control reversing valve; in actual use, the parameter detection unit detects the working parameters of the temperature control device in real time, converts the working parameters into corresponding detection signals, and then transmits the detection signals to the control unit; the control unit compares the detection signals with preset parameters, and controls the first electric control reversing valve switch and the second electric control reversing valve switch according to the comparison result, so as to adjust the water flow direction in the temperature control device, and make the water temperature in the temperature control device keep in a preset range. It can be seen that the application can automatically adjust the two electric control reversing valve switches according to the actual working parameters of the temperature control device, so as to make the water temperature in the temperature control device constant, and further improve the cylinder liner wall surface pollution or corrosion, and has the advantages of simple operation, low cost and easy implementation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engine, in particular to an engine cylinder liner cooling temperature control device and control method. BACKGROUND

[0002] The traditional engine, whether in high load or in low load, the high temperature water on one side of the cylinder liner is generally controlled at 85 DEG C. When the engine is in high load operation, the cylinder liner temperature is relatively high and easy to accumulate oil dirt, polluting the wall surface; when the engine is in low load operation, the cylinder liner temperature is relatively low and easy to cause wall surface corrosion.

[0003] In view of the above technical problems, the existing engine cylinder liner cooling temperature control device solves the above technical problems, but the structure is complex, the operation is cumbersome, and the engine cylinder liner cooling temperature control device cannot keep the water temperature constant by automatic adjustment. SUMMARY

[0004] In view of the above problems, the technical problems to be solved by the present application are to provide an engine cylinder liner cooling temperature control device and control method, which can automatically adjust the opening and closing of the two electrically controlled reversing valves according to the actual working parameters of the temperature control device, so as to keep the water temperature in the temperature control device constant, and further improve the pollution or corrosion of the cylinder liner wall surface.

[0005] To solve the above technical problems, the technical scheme of the present application is:

[0006] An engine cylinder liner cooling temperature control device, comprising a shell, a water inlet, a first water outlet and a second water outlet are arranged on the shell, the water inlet is connected with the cylinder head water outlet, the second water outlet is connected with the cylinder liner water inlet, a first electrically controlled reversing valve, a second electrically controlled reversing valve, a water inlet cavity, a first water outlet cavity, a first bypass water cavity, a second water outlet cavity and a second bypass water cavity are further arranged in the shell, the first electrically controlled reversing valve is in communication with the water inlet cavity, the first bypass water cavity and the first water outlet cavity respectively, the water inlet cavity is in communication with the water inlet, the first water outlet cavity and the first bypass water cavity are in communication with the first water outlet respectively, the second electrically controlled reversing valve is in communication with the water inlet cavity, the second bypass water cavity and the second water outlet cavity respectively, the second water outlet cavity and the second bypass water cavity are in communication with the second water outlet respectively; the device further comprises a control unit and a parameter detection unit connected electrically, the control unit is electrically connected with the first electrically controlled reversing valve and the second electrically controlled reversing valve respectively, the parameter detection unit is used for detecting the working parameters of the engine cylinder liner cooling temperature control device, converting the corresponding detection signals and transmitting to the control unit, and the control unit controls the first electrically controlled reversing valve and the second electrically controlled reversing valve according to the received detection signals.

[0007] Preferably, the parameter detecting unit is a temperature detecting unit, which detects the temperature in the shell, converts the temperature into a corresponding temperature signal and transmits the temperature signal to the control unit, and the control unit controls the first electrically-controlled reversing valve and the second electrically-controlled reversing valve according to the temperature signal.

[0008] Preferably, the temperature detecting unit comprises a temperature sensor arranged in the second water outlet cavity, and the control unit controls the first electrically-controlled reversing valve and the second electrically-controlled reversing valve according to the temperature signal detected by the temperature sensor, so that the water temperature in the shell is within a preset range.

[0009] Preferably, the first electrically-controlled reversing valve and the second electrically-controlled reversing valve are arranged oppositely.

[0010] A control method of an engine cylinder liner cooling temperature control device, applied to the engine cylinder liner cooling temperature control device, the control method comprising the following steps:

[0011] S10, obtaining a working parameter of the engine cylinder liner cooling temperature control device;

[0012] S20, comparing the working parameter with a preset parameter threshold;

[0013] S30, generating a corresponding first control signal according to the comparison result;

[0014] S40, controlling the first electrically-controlled reversing valve and the second electrically-controlled reversing valve according to the first control signal, so that the water temperature in the engine cylinder liner cooling temperature control device is within a preset range.

[0015] Preferably, the S10 further comprises: obtaining a current running state of the engine;

[0016] The S20 further comprises: matching the running state with a preset state;

[0017] The S30 further comprises: if the running state matches the preset state, generating a corresponding second control signal;

[0018] The S40 further comprises: controlling the first electrically-controlled reversing valve and the second electrically-controlled reversing valve according to the second control signal.

[0019] Preferably, the working parameter is a temperature signal in a shell of the engine cylinder liner cooling temperature control device;

[0020] The S20 further comprises: judging whether the temperature signal exists;

[0021] If the temperature signal does not exist, a corresponding alarm signal is generated, and S50 is executed;

[0022] S50, according to the alarm signal, issuing a warning.

[0023] Preferably, the S10 further comprises: judging whether a human-computer interaction signal is received;

[0024] If the human-computer interaction signal is received, a corresponding third control signal is generated, and S40 is executed;

[0025] The S40 further comprises: controlling the first electrically-controlled reversing valve switch and the second electrically-controlled reversing valve switch according to the third control signal.

[0026] Preferably, the preset state comprises a high load state and a low load state;

[0027] The S30 further comprises:

[0028] If the running state matches the high load state, a corresponding high second control signal is generated;

[0029] If the running state matches the low load state, a corresponding low second control signal is generated;

[0030] The S40 further comprises:

[0031] According to the high second control signal, the first electrically-controlled reversing valve is controlled to be fully open and the second electrically-controlled reversing valve is controlled to be closed;

[0032] According to the low second control signal, the first electrically-controlled reversing valve is controlled to be closed and the second electrically-controlled reversing valve is controlled to be fully open.

[0033] Preferably, the step of obtaining the current running state of the engine in the S10 comprises:

[0034] Obtaining an engine supercharger speed and a single-cylinder exhaust temperature signal;

[0035] The step of matching the running state with the preset state in the S20 comprises:

[0036] Judging whether the supercharger speed is greater than a preset first speed value and whether the supercharger speed is less than a preset second speed value;

[0037] Judging whether the single-cylinder exhaust temperature signal is greater than a preset first exhaust temperature value and whether the single-cylinder exhaust temperature signal is less than a preset second exhaust temperature value;

[0038] The S30 further comprises: if the supercharger speed is greater than the first speed value, or the single-cylinder exhaust temperature signal is greater than the first exhaust temperature value, the running state matches the high load state;

[0039] If the supercharger speed is less than the second speed value, or the single-cylinder exhaust temperature signal is less than the second exhaust temperature value, the running state matches the low load state.

[0040] The beneficial effects of the present application are as follows:

[0041] The engine cylinder liner cooling temperature control device and the control method of the present application, wherein the device comprises a shell, a control unit and a parameter detection unit, the shell is provided with a first electrically controlled reversing valve and a second electrically controlled reversing valve, in actual use, the parameter detection unit detects the working parameters of the temperature control device in real time, and converts the working parameters into corresponding detection signals, which are then transmitted to the control unit, the control unit compares the detection signals with the preset parameters, and controls the opening and closing of the first and second electrically controlled reversing valves according to the comparison results, so as to adjust the water flow direction in the temperature control device, and keep the water temperature in the temperature control device within the preset range. It can be seen that the present application can automatically adjust the opening and closing of the two electrically controlled reversing valves according to the actual working parameters of the temperature control device, so as to keep the water temperature in the temperature control device constant, and thus improve the situation of cylinder liner wall pollution or corrosion, and has the advantages of simple operation, low cost and easy implementation. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 is a structural schematic diagram of the engine cylinder liner cooling temperature control device in the present application;

[0043] Figure 2 is a structural schematic diagram of the engine cylinder liner cooling temperature control device when the engine is under low load;

[0044] Figure 3 is a structural schematic diagram of the engine cylinder liner cooling temperature control device when the engine is under high load;

[0045] Figure 4 is a flowchart of the control according to the temperature signal in Example 2;

[0046] Figure 5 is a flowchart of the control according to the engine operating state in Example 2;

[0047] In the figure: 1-shell, 10-water inlet, 11-first water outlet, 12-second water outlet, 2-first electrically controlled reversing valve, 3-second electrically controlled reversing valve, 4-temperature sensor, a-water cavity, b-first bypass water cavity, c-first water outlet cavity, d-second bypass water cavity, e-second water outlet cavity. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0049] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0050] In addition, it should be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] As shown in Figure 1 , Figure 2 and Figure 3 , an engine cylinder liner cooling temperature control device includes a housing 1, the housing 1 is provided with a water inlet 10, a first water outlet 11 and a second water outlet 12, the water inlet 10 is connected with the cylinder head water outlet, the first water outlet 11 is connected with the engine cooler, and the second water outlet 12 is connected with the cylinder liner water inlet 10. Wherein the housing 1 is also provided with a first electric control reversing valve 2, a second electric control reversing valve 3, a water inlet cavity a, a first water outlet cavity c, a first bypass water cavity b, a second water outlet cavity e and a second bypass water cavity d. In the embodiment, the first electric control reversing valve 2 and the second electric control reversing valve 3 are oppositely arranged, the first water outlet 11 and the second water outlet 12 are located on one side of the housing 1, and the water inlet 10 is located on the other side of the housing 1.

[0052] The first electric control reversing valve 2 is in communication with the water inlet cavity a, the first bypass water cavity b and the first water outlet cavity c respectively, the water inlet cavity a is in communication with the water inlet 10, the first water outlet cavity c and the first bypass water cavity b are in communication with the first water outlet 11 respectively, the first water outlet 11 is connected with the cooler of the engine, and by controlling the switch of the first electric control reversing valve 2, the water flow entering the cooler of the engine can be adjusted.

[0053] The second electric control reversing valve 3 is in communication with the water inlet cavity a, the second bypass water cavity d and the second water outlet cavity e respectively, the second water outlet cavity e and the second bypass water cavity d are in communication with the second water outlet 12 respectively, and by controlling the switch of the second electric control reversing valve 3, the water flow entering the cylinder liner can be adjusted.

[0054] The engine cylinder liner cooling temperature control device of the present invention further includes an electrically connected control unit and a parameter detection unit. The control unit is electrically connected to the first electronically controlled reversing valve 2 and the second electronically controlled reversing valve 3 respectively. The parameter detection unit is used to detect the operating parameters of the engine cylinder liner cooling temperature control device, convert them into corresponding detection signals and transmit them to the control unit. The control unit controls the opening and closing of the first electronically controlled reversing valve 2 and the second electronically controlled reversing valve 3 according to the received detection signals.

[0055] In this embodiment, the parameter detection unit may be, but is not limited to, a temperature detection unit. The temperature detection unit detects the temperature inside the housing 1, converts it into a corresponding temperature signal, and transmits it to the control unit. The control unit controls the opening and closing of the first electrically controlled reversing valve 2 and the second electrically controlled reversing valve 3 according to the temperature signal.

[0056] The temperature detection unit includes a temperature sensor 4 located inside the second water outlet chamber e. The control unit controls the opening and closing of the first electrically controlled directional valve 2 and the second electrically controlled directional valve 3 based on the temperature signal detected by the temperature sensor 4, thereby maintaining the water temperature inside the housing 1 within a preset range. In this embodiment, a groove is provided on the inner wall of the housing 1 inside the second water outlet chamber e, and the detection end of the temperature sensor 4 is located within the groove.

[0057] The working process of the engine cylinder liner cooling temperature control device of the present invention is as follows:

[0058] like Figure 2 As shown, when the temperature signal t0 detected by temperature sensor 4 is greater than or equal to the preset temperature signal t1, the control unit controls the first electronically controlled directional valve 2 to gradually close. After fully closing, it connects the inlet water chamber a, the first bypass water chamber b, and the first outlet water chamber c, thus opening the bypass route. The water flow in this bypass route is relatively small. At the same time, the control unit controls the second electronically controlled directional valve 3 to gradually open. After fully opening, it connects the inlet water chamber a and the second outlet water chamber e, thus opening the main route and closing the second bypass water chamber d. At this time, the water flow to the cylinder liner is large and the temperature is high, thereby solving the technical problem of easy wall corrosion due to low cylinder liner temperature.

[0059] like Figure 3 As shown, when the temperature signal t0 detected by temperature sensor 4 is less than or equal to the preset temperature signal t2, t1>t2. The control unit controls the first electronically controlled directional valve 2 to gradually open. When fully open, it connects the inlet water chamber a and the first outlet water chamber c, thus opening the main route and closing the first bypass water chamber b, resulting in a larger water flow to the cooler. Simultaneously, the control unit controls the second electronically controlled directional valve 3 to gradually close. When fully closed, it connects the inlet water chamber a, the second bypass water chamber d, and the second outlet water chamber e, thus opening the bypass route. The water flow in this route is smaller, resulting in a smaller water flow to the cylinder liner at a lower temperature. This solves the technical problem of high cylinder liner temperature leading to oil buildup and contamination of the cylinder wall.

[0060] It can be seen that the engine cylinder liner cooling temperature control device of the application controls the first electric control reversing valve 2 and the second electric control reversing valve 3 to gradually open and close according to the temperature signal detected by the temperature sensor 4, thereby controlling the water flow of the main water path and the bypass water path, so that the water temperature in the shell 1 is kept within the preset range, and the water temperature flowing to the cylinder liner is kept within the corresponding range at all times, thereby improving the situation of cylinder liner wall pollution or corrosion, and the application has the advantages of simple structure, easy implementation and low cost.

[0061] Example two:

[0062] A control method of an engine cylinder liner cooling temperature control device is applied to the engine cylinder liner cooling temperature control device of example one, and the control method comprises the following steps:

[0063] Step S10, obtaining the working parameters of the engine cylinder liner cooling temperature control device;

[0064] Step S20, comparing the working parameters with the preset parameter threshold value;

[0065] Step S30, generating the corresponding first control signal according to the comparison result;

[0066] Step S40, controlling the first electric control reversing valve switch and the second electric control reversing valve switch according to the first control signal, so that the water temperature in the engine cylinder liner cooling temperature control device is within the preset range.

[0067] The control method of the application mainly controls the first electric control reversing valve switch and the second electric control reversing valve switch by real-time detection of the working parameters of the engine cylinder liner cooling temperature control device, so that the water temperature flowing to the cylinder liner is kept within the corresponding range at all times.

[0068] When the working parameters can be but are not limited to the temperature signal in the shell, the control method of the application is specifically:

[0069] Obtain the temperature signal t0 in the shell of the engine cylinder liner cooling temperature control device, and judge whether the relationship t2≤t0≤t1 is established.

[0070] If t0≥t1, it indicates that the water temperature in the shell of the engine cylinder liner cooling temperature control device is relatively high, and the generated first control signal is: control the first electric control reversing valve to gradually open, control the second electric control reversing valve to gradually close, and keep the state, and the water temperature is reduced.

[0071] In this process, the temperature signal t0 is obtained, and then it is judged whether the relationship t2≤t0<t is established, and the above t2<t<t1, if the relationship t2≤t0<t is established, the normal operation is normal.

[0072] If the relationship t2≤t0<t is not established, it is judged whether the relationship t2≤t0≤t1 is established.

[0073] If t0≤t2, the generated first control signal is: control the first electrically controlled reversing valve to gradually close, gradually open the second electrically controlled reversing valve, and keep the state, and the water temperature is raised.

[0074] In this process, the temperature signal t0 is acquired, and then it is judged whether the relationship t2≤t0

[0075] It can be seen that the control method of the present application can automatically control the water temperature flowing to the cylinder sleeve in the corresponding range, thereby improving the cylinder sleeve wall surface pollution or corrosion, and the present application realizes automatic control adjustment, is simple to operate, easy to realize, and can be widely applied. Of course, the working parameter can use water flow.

[0076] In the embodiment, the engine cylinder sleeve cooling temperature control device can be controlled according to the running state of the engine, and the control method of the present application is specifically:

[0077] Step S10: acquiring the current running state of the engine;

[0078] Step S20: matching the running state with the preset state;

[0079] Step S30: if the running state matches the preset state, generating a corresponding second control signal;

[0080] Step S40: controlling the first electrically controlled reversing valve switch and the second electrically controlled reversing valve switch according to the second control signal.

[0081] As shown in the figure, when the preset state includes a high load state and a low load state, the control method of the present application is specifically: Figure 5

[0082] Step S10: acquiring the engine supercharger speed n0 and the single cylinder exhaust temperature signal T0;

[0083] Step S20: judging whether the supercharger speed n0 is greater than the preset first speed value n1,

[0084] judging whether the supercharger speed n0 is less than the preset second speed value n2;

[0085] judging whether the single cylinder exhaust temperature signal T0 is greater than the preset first exhaust temperature value T1,

[0086] judging whether the single cylinder exhaust temperature signal T0 is less than the preset second exhaust temperature value T2;

[0087] ​Step S30: If the supercharger speed n0 is greater than the first speed value n1, or the single cylinder exhaust temperature signal T0 is greater than the first exhaust temperature value T1, the operating state matches the high load state;

[0088] If the operating state matches the high load state, a corresponding high second control signal is generated;

[0089] If the supercharger speed n0 is less than the second speed value n2, or the single cylinder exhaust temperature signal T0 is less than the second exhaust temperature value T2, the operating state matches the low load state;

[0090] If the operating state matches the low load state, a corresponding low second control signal is generated.

[0091] Step S40: According to the high second control signal, the first electrically controlled reversing valve is controlled to be fully open and the second electrically controlled reversing valve is controlled to be closed;

[0092] According to the low second control signal, the first electrically controlled reversing valve is controlled to be closed and the second electrically controlled reversing valve is controlled to be fully open.

[0093] Through the above steps, the first electrically controlled reversing valve and the second electrically controlled reversing valve are automatically controlled by the operating state of the engine, such as high load and low load, so as to adjust the water flow direction in the engine liner cooling temperature control device shell.

[0094] Specifically referring to Figure 2 , when the engine operates in the low load state, the first electrically controlled reversing valve performs a step-by-step closing action, and after full closing, the water inlet water chamber a, the first bypass water chamber b and the first water outlet water chamber c are connected, that is, the bypass route is opened, and the water flow is small; At the same time, the second electrically controlled reversing valve performs a step-by-step opening work, and after full opening, the water inlet water chamber a and the second water outlet water chamber e are connected, that is, the main route is opened, and the second bypass water chamber d is closed. At this time, the flow rate of the engine liner cooling temperature control device to the liner is large, and the temperature is high, thereby solving the technical problem that the liner temperature is low and wall corrosion is easy to occur.

[0095] Specifically referring to Figure 3 , when the engine operates in the high load state, the first electrically controlled reversing valve performs a step-by-step opening action, and after full opening, the water inlet water chamber a and the first water outlet water chamber c are connected, that is, the main route is opened, and the first bypass water chamber b is closed, and the water flow to the cooler is large; At the same time, the second electrically controlled reversing valve performs a step-by-step closing work, and after full closing, the water inlet water chamber a, the second bypass water chamber d and the second water outlet water chamber e are connected, that is, the bypass route is opened, and the water flow is small, and the water flow to the liner is small and the temperature is low, thereby solving the technical problem that the liner temperature is high and oil stains are easy to accumulate and pollute the wall surface.

[0096] As Figure 4As shown, when the working parameter is a temperature signal in the shell of the engine liner cooling temperature control device, the control method of the present application specifically comprises:

[0097] Step S10: obtaining a temperature signal in the shell of the engine liner cooling temperature control device;

[0098] Step S20: judging whether the temperature signal exists;

[0099] If the temperature signal does not exist, a corresponding alarm signal is generated, and S50 is executed;

[0100] Step S50: issuing a warning according to the alarm signal.

[0101] When it is detected that there is no temperature signal, it indicates that the temperature sensor has a fault or the like, at this time, a warning needs to be issued to inform the user that the engine liner cooling temperature control device has a fault, so as to process in time and avoid the fault from being enlarged.

[0102] The engine liner cooling temperature control device of the present application can also be controlled by using a man-machine interaction signal, and the control method specifically comprises:

[0103] Step S10 further comprises: judging whether a man-machine interaction signal is received;

[0104] If the man-machine interaction signal is received, a corresponding third control signal is generated, and S40 is executed;

[0105] Step S40: controlling the first electrically controlled reversing valve and the second electrically controlled reversing valve according to the third control signal.

[0106] The man-machine interaction unit of the engine, or a man-machine interaction unit is arranged on the engine liner cooling temperature control device, and the man-machine interaction signal is input, the man-machine interaction unit can include a touch screen, a key, etc., and the first electrically controlled reversing valve switch and the second electrically controlled reversing valve switch can be controlled by inputting through the man-machine interaction unit, in this way, the engine liner cooling temperature control device can meet various use requirements and be suitable for different application scenarios.

[0107] The above only describes the preferred embodiments of the present application and does not limit the present application, and any modification, equivalent engine liner cooling temperature control device and control method improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An engine cylinder liner cooling temperature control device, comprising a housing, a water inlet, a first water outlet and a second water outlet are arranged on the housing, the water inlet is connected with a cylinder head water outlet, the first water outlet is connected with an engine cooler, and the second water outlet is connected with a cylinder liner water inlet, characterized in that, The shell is further provided with a first electrically-controlled reversing valve, a second electrically-controlled reversing valve, a water inlet cavity, a first water outlet cavity, a first bypass water cavity, a second water outlet cavity and a second bypass water cavity. The first electrically-controlled reversing valve is in communication with the water inlet cavity, the first bypass water cavity and the first water outlet cavity respectively. The water inlet cavity is in communication with the water inlet. The first water outlet cavity and the first bypass water cavity are in communication with the first water outlet respectively. The second electrically-controlled reversing valve is in communication with the water inlet cavity, the second bypass water cavity and the second water outlet cavity respectively. The second water outlet cavity and the second bypass water cavity are in communication with the second water outlet respectively. The device further comprises an electrically-connected control unit and a parameter detection unit. The control unit is electrically connected with the first electrically-controlled reversing valve and the second electrically-controlled reversing valve respectively. The parameter detection unit is used for detecting the working parameters of the engine cylinder liner cooling temperature control device, converting the corresponding detection signals and transmitting the detection signals to the control unit. The control unit controls the first electrically-controlled reversing valve and the second electrically-controlled reversing valve according to the received detection signals.

2. The engine liner cooling temperature control device according to claim 1, characterized by, The parameter detection unit is a temperature detection unit. The temperature detection unit detects the temperature in the shell, converts the corresponding temperature signals and transmits the temperature signals to the control unit. The control unit controls the first electrically-controlled reversing valve and the second electrically-controlled reversing valve according to the temperature signals.

3. The engine liner cooling temperature control device according to claim 2, characterized by, The temperature detection unit comprises a temperature sensor arranged in the second water outlet cavity. The control unit controls the first electrically-controlled reversing valve switch and the second electrically-controlled reversing valve switch according to the temperature signals detected by the temperature sensor, so that the water temperature in the shell is within a preset range.

4. The engine liner cooling temperature control device according to claim 1, characterized by, The first electrically-controlled reversing valve and the second electrically-controlled reversing valve are arranged oppositely.

5. A control method of an engine cylinder liner cooling temperature control device characterized by comprising: The control method is applied to the engine cylinder liner cooling temperature control device of any one of claims 1 to 4. The control method comprises the following steps: S10, obtaining the working parameters of the engine cylinder liner cooling temperature control device; S20, comparing the working parameters with preset parameter thresholds; S30, generating corresponding first control signals according to the comparison results; S40, controlling the first electrically-controlled reversing valve switch and the second electrically-controlled reversing valve switch according to the first control signals, so that the water temperature in the engine cylinder liner cooling temperature control device is within a preset range.

6. The control method of the engine cylinder liner cooling temperature control device according to claim 5, characterized by The S10 further comprises: obtaining the current operating state of the engine. The S20 further comprises: matching the operating state with a preset state. The S30 further comprises: if the operating state matches the preset state, generating corresponding second control signals. The S40 further comprises: controlling the first electrically-controlled reversing valve switch and the second electrically-controlled reversing valve switch according to the second control signals.

7. The control method of the engine cylinder liner cooling temperature control apparatus according to claim 5, characterized by, The working parameters are temperature signals in the shell of the engine cylinder liner cooling temperature control device. The S20 further comprises: judging whether the temperature signals exist or not. If the temperature signals do not exist, corresponding alarm signals are generated, and S50 is executed. S50, issuing warnings according to the alarm signals.

8. The control method of the engine cylinder liner cooling temperature control apparatus according to claim 5, characterized by, The S10 further comprises: judging whether a man-machine interaction signal is received or not. If the man-machine interaction signal is received, corresponding third control signals are generated, and S40 is executed. The S40 further comprises: controlling the first electrically-controlled reversing valve switch and the second electrically-controlled reversing valve switch according to the third control signal.

9. The control method of the engine cylinder liner cooling temperature control apparatus according to claim 6, characterized by, The preset states comprise a high load state and a low load state. The S30 further comprises: If the running state matches the high load state, a corresponding high second control signal is generated; If the running state matches the low load state, a corresponding low second control signal is generated; The S40 further comprises: According to the high second control signal, the first electrically-controlled reversing valve is controlled to be fully open and the second electrically-controlled reversing valve is controlled to be closed; According to the low second control signal, the first electrically-controlled reversing valve is controlled to be closed and the second electrically-controlled reversing valve is controlled to be fully open.

10. The control method of the engine liner cooling temperature control device according to claim 9, wherein The step of obtaining the current running state of the engine in the S10 comprises: obtaining an engine supercharger speed and a single cylinder exhaust temperature signal; The step of matching the running state with the preset state in the S20 comprises: determining whether the supercharger speed is greater than a preset first speed value and whether the supercharger speed is less than a preset second speed value; determining whether the single cylinder exhaust temperature signal is greater than a preset first exhaust temperature value and whether the single cylinder exhaust temperature signal is less than a preset second exhaust temperature value; The S30 further comprises: if the supercharger speed is greater than the first speed value or the single cylinder exhaust temperature signal is greater than the first exhaust temperature value, the running state matches the high load state; if the supercharger speed is less than the second speed value or the single cylinder exhaust temperature signal is less than the second exhaust temperature value, the running state matches the low load state.

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