Piston cooling oil injection control system, engine and vehicle

Abstract

The utility model discloses a piston cooling oil injection control system, engine and vehicle, including engine main oil duct, control oil duct, temperature sensing control piece and hydraulic switch valve, the inlet of engine main oil duct is connected with the oil pump, the first outlet branch of engine main oil duct is connected with the liquid inlet of control oil duct through temperature sensing control piece, and the second outlet branch of engine main oil duct is connected with the liquid outlet of control oil duct through hydraulic switch valve. The temperature sensing control piece changes the flow area from the first outlet branch to the control oil duct according to the temperature of oil in the engine main oil duct, the second outlet branch of the engine main oil duct is communicated with a first inlet of the hydraulic switch valve, a second inlet of the hydraulic switch valve is communicated with an outlet of the control oil duct, and a liquid outlet of the hydraulic switch valve is communicated with the nozzle. When the temperatures of the oil in the main oil duct of the engine are different due to different engine powers, the flow area input into the control oil duct is adjusted through the temperature sensing control piece, the pressure of the engine oil of the second inlet is changed, the opening degree of the liquid outlet of the hydraulic switch valve is adjusted, and then the flow of the oil in the nozzle is controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to an oil injection control system for piston cooling, an engine and a vehicle. Background Art

[0002] As one of the important parts of the engine, the piston is subjected to great heat load and impact load while running at high speed, which makes the working environment and working conditions of the piston harsh.

[0003] As the power density and strengthening degree of the engine continue to increase, the thermal load of the engine increases. Excessive thermal load will cause the temperature of the engine's combustion chamber and piston to rise, making the piston prone to thermal fatigue cracking, cylinder pulling, burning and other phenomena, and then causing engine failures such as cylinder tamping, affecting the normal operation of the vehicle and driving safety, and affecting the reliability and stability of the piston.

[0004] In order to reduce the working temperature of the piston and improve the reliability and stability of the piston, a nozzle is usually used to spray engine oil onto the top of the piston to reduce the temperature of the piston.

[0005] At present, the control method for the nozzle is to set a control valve between the main oil channel and the nozzle, wherein the main oil channel is connected to the engine through an oil pump, and the control valve is a mechanical valve or a solenoid valve, and is connected between the main oil channel and the nozzle. According to the oil pressure in the main oil channel of the engine, the opening size of the control valve changes accordingly to control the injection amount of the nozzle.

[0006] Specifically, as the oil pressure in the main oil channel increases, the opening of the control valve on the main oil channel becomes larger under the action of the oil pressure, thereby increasing the amount of oil sprayed from the nozzle; when the oil pressure in the main oil channel decreases, the opening of the control valve on the main oil channel becomes smaller under the action of the oil pressure, thereby reducing the amount of oil sprayed from the nozzle. The temperature of the piston can be regulated through the above control method.

[0007] However, since the top of the piston does not need to be cooled under all operating conditions, for example, the piston does not need to be cooled when the engine power is lower than the preset value, the use of a control valve cannot control the injection amount according to the actual operating conditions of the engine, which will cause unreasonable injection and lead to the piston cooling temperature being too low, which in turn leads to an increase in vehicle fuel consumption and worsening emissions.

[0008] Therefore, how to provide a fuel injection control system for piston cooling so that the nozzle sprays reasonably, ensures the piston cooling effect, and improves the economy of engine fuel is a technical problem that needs to be solved urgently by skilled technicians. Utility Model Content

[0009] In view of this, the utility model provides a piston cooling oil injection control system, which makes the nozzle spray reasonably, ensures the piston cooling effect, and improves the economy of engine fuel. In addition, the utility model also provides an engine and a vehicle with the control system of the nozzle.

[0010] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0011] An oil injection control system for piston cooling, comprising:

[0012] An engine main oil passage, wherein the inlet of the engine main oil passage is connected to an oil pump of the engine;

[0013] A control oil passage, wherein a first outlet branch of the main oil passage of the engine is connected to a liquid inlet of the control oil passage;

[0014] a temperature sensing control component, the temperature sensing control component connecting the first outlet branch of the engine main oil channel and the control oil channel, the temperature sensing control component being capable of changing a flow area from the first outlet branch to the control oil channel according to the oil temperature in the engine main oil channel;

[0015] A hydraulic switching valve, wherein the second outlet branch of the engine main oil channel is connected to the first inlet of the hydraulic switching valve, the second inlet of the hydraulic switching valve is connected to the outlet of the control oil channel, and the liquid outlet of the hydraulic switching valve is used to communicate with the nozzle.

[0016] Preferably, in the above-mentioned piston cooling oil injection control system, the temperature sensing control component is a thermostat;

[0017] The inlet of the thermostat is connected to the first outlet branch of the main oil channel of the engine, and the outlet of the thermostat is connected to the control oil channel; the thermostat changes the connection size between the inlet of the thermostat and the outlet of the thermostat according to the oil temperature in the main oil channel of the engine, and changes the flow area of ​​the first outlet branch to the control oil channel.

[0018] Preferably, in the above-mentioned piston cooling oil injection control system, the temperature sensing control component is a temperature sensing component whose volume can expand and contract with heat and cold, and the temperature sensing component is arranged on the inner wall of the first outlet branch and / or the inner wall of the control oil channel to change the flow area of ​​the first outlet branch to the control oil channel.

[0019] Preferably, the above-mentioned piston cooling oil injection control system further includes:

[0020] A nozzle oil passage, the inlet of the nozzle oil passage is communicated with the liquid outlet, and the outlet of the nozzle oil passage is used to communicate with the nozzle.

[0021] Preferably, in the above-mentioned piston cooling oil injection control system, the hydraulic switch valve comprises:

[0022] A valve body, wherein the first inlet, the second inlet and the liquid outlet are through holes penetrating the wall thickness of the valve body;

[0023] A valve core is installed inside the valve body and can move inside the valve body under the driving action of the oil in the control oil channel to adjust the communication area between the first inlet and the outlet.

[0024] Preferably, in the above-mentioned piston cooling oil injection control system, the hydraulic switch valve further comprises:

[0025] A return spring, along the moving direction of the valve core, one end of the valve core is against the valve body through the return spring; a driving space is provided between the other end of the valve core and the valve body, and the driving space is communicated with the second inlet.

[0026] Preferably, in the above-mentioned piston cooling oil injection control system, the first inlet and the liquid outlet are located on both sides of the valve core and are staggered; and the valve core is provided with an annular groove, and the first inlet and the liquid outlet can be connected through the annular groove.

[0027] Preferably, in the above-mentioned piston cooling oil injection control system, the distance between the liquid outlet and the return spring is smaller than the distance from the first inlet to the return spring, and along the moving direction of the valve core, the distance between the liquid outlet and the first inlet is smaller than the width of the annular groove.

[0028] An engine comprises a nozzle for piston cooling and a nozzle control system, wherein the nozzle control system is any one of the above-mentioned piston cooling oil injection control systems.

[0029] A vehicle comprises an engine, wherein the engine is the engine described above.

[0030] The utility model discloses an oil injection control system for piston cooling, wherein a second outlet branch of an engine main oil channel is connected to a first inlet of a hydraulic switch valve, the first outlet branch of the engine main oil channel is connected to a control oil channel through a temperature sensing control component, and the outlet of the control oil channel is connected to the second inlet of the hydraulic switch valve. When the engine power is different, the oil temperature in the engine main oil channel is different, and the flow area input to the control oil channel is adjusted through the temperature sensing control component, thereby changing the oil pressure at the second inlet of the hydraulic switch valve; the change of the oil pressure at the second inlet can adjust the opening of the liquid outlet of the hydraulic switch valve, and then control the flow rate of the nozzle oil, so that the cooling of the piston is related to the power of the engine, the injection of the nozzle is reasonable, the piston cooling effect is guaranteed, and the economy of the engine fuel is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is an oil flow diagram when the thermostat of the piston cooling oil injection control system disclosed in the embodiment of the utility model is closed;

[0033] Figure 2 for Figure 1 Structural diagram of the hydraulic switch valve in the state;

[0034] Figure 3 It is an oil flow diagram of the piston cooling oil injection control system disclosed in the embodiment of the utility model when the thermostat is half open;

[0035] Figure 4 for Figure 3 Structural diagram of the hydraulic switch valve in the state;

[0036] Figure 5 It is an oil flow diagram of the piston cooling oil injection control system disclosed in the embodiment of the utility model when the thermostat is fully opened;

[0037] Figure 6 for Figure 5 Structural diagram of the hydraulic switch valve in state. DETAILED DESCRIPTION

[0038] The utility model discloses a piston cooling oil injection control system, which makes the nozzle spray reasonably, ensures the piston cooling effect, and improves the economy of engine fuel. In addition, the utility model also discloses an engine and a vehicle with the control system of the nozzle.

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0041] As one of the important parts of the engine, the piston is subjected to great heat load and impact load while running at high speed, which makes the working environment and working conditions of the piston harsh.

[0042] As the power density and strengthening degree of the engine continue to increase, the thermal load of the engine increases. Excessive thermal load will cause the temperature of the engine's combustion chamber and piston to rise, making the piston prone to thermal fatigue cracking, cylinder pulling, burning and other phenomena, and then causing engine failures such as cylinder tamping, affecting the normal operation of the vehicle and driving safety, and affecting the reliability and stability of the piston.

[0043] In order to reduce the working temperature of the piston and improve the reliability and stability of the piston, a nozzle is usually used to spray engine oil onto the top of the piston to reduce the temperature of the piston.

[0044] It should be noted that different engine powers can reflect the thermal load of the piston and the oil temperature, that is, as the engine power increases, the engine oil temperature will increase; as the engine power decreases, the engine oil temperature will decrease. Based on this, the present application combines the cooling of the piston with the engine oil temperature, thereby combining the cooling of the piston with the engine power.

[0045] In this application, Figure 1 , Figure 3 and Figure 5 The piston cooling oil injection control system disclosed in the invention controls the oil injection amount of the nozzle 7 to make the injection of the nozzle 7 reasonable, ensure the piston cooling effect, and improve the economy of the engine fuel.

[0046] like Figure 1 , Figure 3 and Figure 5 As shown, the oil injection control system for piston cooling includes: an engine main oil channel 2, a control oil channel 4, a temperature sensing control component and a hydraulic switch valve 5.

[0047] The engine main oil gallery 2 includes an inlet, a first outlet branch 21 and a second outlet branch 22. The first outlet branch 21 and the second outlet branch 22 are pipelines both connected to the inlet, and the first outlet branch 21 and the second outlet branch 22 are arranged in parallel.

[0048] The hydraulic switch valve 5 comprises a first inlet 511 , a second inlet 512 and a liquid outlet 513 , wherein the liquid flow rate of the liquid outlet 513 can be changed under the action of the oil pressure in the first inlet 511 and the second inlet 512 .

[0049] The inlet of the engine main oil channel 2 is connected to the engine oil pump 1, and the first outlet branch 21 of the engine main oil channel 2 is connected to the liquid inlet of the control oil channel 4. Specifically, the first outlet branch 21 is connected to the control oil channel 4 through a temperature sensing control component, and the temperature sensing control component can change the flow area of ​​the first outlet branch 21 to the control oil channel 4 according to the oil temperature in the engine main oil channel 2.

[0050] The second outlet branch 22 of the engine main oil channel 2 is connected to the first inlet 511 of the hydraulic switch valve 5, the second inlet 512 of the hydraulic switch valve 5 is connected to the outlet of the control oil channel 4, and the liquid outlet 513 of the hydraulic switch valve 5 is used to communicate with the nozzle 7.

[0051] The utility model discloses an oil injection control system for piston cooling, which increases a control oil passage, connects a second outlet branch 22 of an engine main oil passage with a first inlet 511 of a hydraulic switch valve 5, connects the first outlet branch 21 of the engine main oil passage with a control oil passage 4 through a temperature sensing control component, and connects the outlet of the control oil passage 4 with a second inlet 512 of the hydraulic switch valve 5. When the engine power is different, the oil temperature in the engine main oil passage 2 is different, and the flow area input to the control oil passage is adjusted through the temperature sensing control component, thereby changing the oil pressure of the second inlet 512 of the hydraulic switch valve 5; the oil pressure change of the second inlet 512 can adjust the opening of the liquid outlet 513 of the hydraulic switch valve 5, and then control the flow rate of the nozzle oil, so that the cooling of the piston is related to the power of the engine, the injection of the nozzle is reasonable, the piston cooling effect is guaranteed, and the economy of the engine fuel is improved.

[0052] It should be noted that the material of the main oil channel 2 of the engine and the installation method on the engine can refer to the main oil channel of the existing engine.

[0053] The height of the engine oil temperature in this application is related to the power of the engine. The higher the engine power, the higher the engine oil temperature.

[0054] In some embodiments, the temperature sensing control component includes but is not limited to the thermostat 3. It should be noted that the thermostat 3 is a valve that controls the flow path of the liquid, and is an automatic temperature regulating device, which usually contains a temperature sensing component, and opens and closes the flow of air, gas or liquid by thermal expansion or contraction. Usually, when the thermostat is lower than the specified temperature, the thermostat is in a closed state, that is, the flow of the liquid is closed; when the thermostat 3 is higher than the specified temperature, the thermostat 3 is in an open state, that is, the flow of the liquid is conducted.

[0055] The inlet of the thermostat 3 is connected to the first outlet branch 21 of the engine main oil channel 2; the outlet of the thermostat 3 is connected to the control oil channel 4; the thermostat 3 changes the connection size between the inlet of the thermostat 3 and the outlet of the thermostat 3 according to the oil temperature in the engine main oil channel 2, thereby changing the flow area of ​​the first outlet branch 21 to the control oil channel 4.

[0056] When the oil temperature in the main oil gallery 2 of the engine is lower than the first preset value, the temperature sensing component of the thermostat 3 closes the thermostat 3, thereby disconnecting the connection between the control oil gallery 4 and the first outlet branch 21. When the oil temperature in the main oil gallery 2 of the engine is higher than the first preset value, the temperature sensing component of the thermostat 3 opens the thermostat 3, thereby connecting the control oil gallery 4 and the first outlet branch 21.

[0057] In some embodiments, when the oil temperature in the main oil channel 2 of the engine is greater than a second preset value, the flow area of ​​the control oil channel 4 is the largest, and the second preset value is greater than the first preset value; as the oil temperature in the main oil channel 2 of the engine changes from the first preset value to the second preset value, the flow area of ​​the control oil channel 4 gradually increases.

[0058] The setting of the first preset value and the second preset value is related to the temperature sensing component of the thermostat 3 itself. Through the above setting, when the engine oil temperature is lower than the first preset value, the thermostat 3 is in a closed state; when the engine oil temperature is higher than the second preset value, the thermostat 3 is in a fully open state. At this time, the flow area of ​​the first outlet branch 21 to the control oil channel 4 is the largest; and when the engine oil temperature is between the first preset value and the second preset value, the thermostat 3 is not fully open, and the opening of the thermostat 3 is related to the engine oil temperature. Specifically, in the process of the engine oil temperature changing from the first preset value to the second preset value, the opening of the thermostat 3 gradually increases, thereby causing the flow area of ​​the first outlet branch 21 to the control oil channel 4 to gradually increase.

[0059] The thermostat 3 of the present application can utilize the change in oil temperature to adjust the flow area of ​​the first outlet branch 21 to the control oil channel 4, and then adjust the oil pressure delivered from the control oil channel 4 to the second inlet 512 to achieve the regulation of the flow rate of the liquid outlet 513.

[0060] It should be noted that the type of the temperature sensing component of the thermostat 3 can be set according to different needs. In some embodiments, the thermostat 3 includes but is not limited to a wax thermostat.

[0061] In some embodiments, the temperature-sensing control component may also be a temperature-sensing pipe (not shown in the figure) whose inner diameter can expand and contract with heat, and the temperature-sensing pipe is connected to the first outlet branch 21 and the inlet of the control oil channel 4. When the temperature of the oil flowing through the temperature-sensing pipe changes, the inner diameter of the temperature-sensing pipe will change. When the temperature of the oil flowing through the temperature-sensing pipe increases, the inner diameter of the temperature-sensing pipe will increase; and when the temperature of the oil flowing through the temperature-sensing pipe decreases, the inner diameter of the temperature-sensing pipe will decrease, or even fit.

[0062] By changing the shape of the temperature-sensing pipe, the flow area of ​​the first outlet branch 21 to the control oil channel 4 can be changed.

[0063] In some embodiments, the temperature sensing control component is installed close to the engine main oil passage 2, so that the temperature sensing control component is closer to the oil in the engine main oil passage 2, which improves the accuracy of the temperature of the oil in the engine main oil passage 2 detected by the temperature sensing control component, thereby more accurately controlling the nozzle 7. The specific installation position of the temperature sensing control component can be set according to different needs.

[0064] In some embodiments, the oil injection control system for piston cooling further includes: a nozzle oil channel 6 .

[0065] The inlet of the nozzle oil passage 6 is communicated with the liquid outlet 513 , and the outlet of the nozzle oil passage 6 is used to communicate with the nozzle 7 .

[0066] The nozzle oil passage 6 is provided to facilitate the connection of the pipeline, and is closer to the engine structure itself. For the connection between the nozzle oil passage 6 and the nozzle 7, reference can be made to the existing known structure.

[0067] The hydraulic switch valve 5 disclosed in the embodiment of the present application is a hydraulic structure valve. The use of a hydraulic structure valve can improve the response speed, reduce the dependence on electricity and labor, and reduce the occurrence rate of failures. Figure 2 , Figure 4 and Figure 6 The structure of the hydraulic switch valve 5 disclosed in the present application is described in detail. It should be noted that the hydraulic switch valve 5 in the present application includes but is not limited to the structures described below. As long as the structure can meet the functions of the hydraulic switch valve 5, it is within the protection scope.

[0068] like Figure 2 , Figure 4 and Figure 6 As shown, the hydraulic switch valve 5 includes: a valve body 51 , a valve core 52 and a return spring 53 .

[0069] The valve body 51 is a hollow structure, and the first inlet 511 , the second inlet 512 and the liquid outlet 513 are all through holes penetrating the wall thickness of the valve body 51 .

[0070] In some embodiments, the valve body 51 is a cylindrical or rectangular parallelepiped structure with an accommodating space inside, and the first inlet 511 , the second inlet 512 , and the liquid outlet 513 are all in communication with the accommodating space.

[0071] The valve core 52 is installed inside the valve body 51. Specifically, the valve core 52 is installed in the accommodating space and can move in the valve body 51. When the pressure of the oil in the first inlet 511 and the second inlet 512 changes, the valve core 52 is driven to move in the valve body 51.

[0072] In some embodiments, the first inlet 511 and the liquid outlet 513 are located on both sides of the valve core 52 and are staggered; and the valve core 52 has an annular groove 521 , and the first inlet 511 and the liquid outlet 513 can be connected through the annular groove 521 .

[0073] The depth and width of the annular groove 521, as well as the cross-sectional shape of the annular groove 521, can be set according to different needs, and it is necessary to ensure that the flow area of ​​the annular groove 521 connecting the first inlet 511 and the liquid outlet 513 can change during the movement of the valve core 52. Specifically: when the annular groove 521 is fully connected with the first inlet 511, the connection area of ​​the annular groove 521 and the liquid outlet 513 gradually changes; when the annular groove 521 is fully connected with the liquid outlet 513, the connection area of ​​the annular groove 521 and the first inlet 511 gradually changes.

[0074] It should be noted that the arrangement, shape and size of the first inlet 511, the second inlet 512 and the liquid outlet 513 can be set according to different needs. In some embodiments, the first inlet 511 and the second inlet 512 are located on the same side of the valve body 51, and the liquid outlet 513 is located on the other side of the valve body 51, that is, the first inlet 511 and the liquid outlet 513 are respectively on both sides of the valve core 52.

[0075] The two side directions of the valve core 52 are directions perpendicular to the moving direction of the valve core 52 .

[0076] In order to realize the reciprocating movement of the valve core 52 , at two ends of the moving direction of the valve core 52 , one end is against the valve body 51 through the return spring 53 , and the other end can be a cavity, that is, a driving space 54 for accommodating oil, and the above-mentioned second inlet 512 is connected to the driving space 54 .

[0077] In order to adjust the flow area of ​​the hydraulic switch valve 5, in some embodiments, the first inlet 511 and the liquid outlet 513 are staggered. Since the first inlet 511 and the liquid outlet 513 are located on both sides of the valve body 51 and are staggered, the flow area between the annular groove 521 and the first inlet 511 and the liquid outlet 513 will change during the movement of the valve core 52.

[0078] In some embodiments, the distance between the liquid outlet 513 and the reset spring 53 is smaller than the distance between the first inlet 511 and the reset spring 53, and along the moving direction of the valve core 52, the width of the annular groove 521 is greater than the distance between the liquid outlet 513 and the first inlet 511, so as to ensure that the liquid outlet 513 and the first inlet 511 are fully connected during the movement of the valve core 52.

[0079] Combination Figures 1 to 6 The control process of the nozzle 7 disclosed in this application is described as follows:

[0080] As 1 and Figure 2 As shown, when the power of the engine is low and the temperature of the oil reaching the main oil channel 2 of the engine through the oil pump 1 is lower than the first preset value, the oil cannot open the thermostat 3, so that the thermostat 3 is in a closed state; the oil in the main oil channel 2 of the engine cannot pass through the hydraulic switch valve 5 and the nozzle oil channel 6 to the nozzle 7, and the nozzle 7 cannot cool the piston to avoid overcooling of the piston.

[0081] Since there is no oil in the control oil passage 4, no oil enters the Figure 2 In the driving space 54 of the hydraulic switch valve 5, the valve core 52 cannot be driven to move in the valve body 51. During this process, the first inlet 511 is opposite to the annular groove 521, the liquid outlet 513 is misaligned with the annular groove 521, the first inlet 511 is not connected to the liquid outlet 513, and the nozzle 7 is not cooled.

[0082] like Figure 3 and Figure 4As shown, as the engine power increases, the temperature of the engine oil gradually increases. When the temperature of the oil delivered to the engine main oil gallery 2 by the oil pump 1 is greater than the first preset value and less than the second preset value, the oil causes the thermostat 3 to open, and a portion of the oil in the engine main oil gallery 2 enters the control oil gallery 4 through the first outlet branch 21 of the engine main oil gallery 2 after being throttled by the thermostat 3, and is delivered to the second inlet 512 of the hydraulic switch valve 5 through the control oil gallery 4; another portion of the oil in the engine main oil gallery 2 enters the first inlet 511 of the hydraulic switch valve 5 through the second outlet branch 22 of the engine main oil gallery 2. Under the pressure of the oil in the first inlet 511 and the second inlet 512 and the action of the return spring 53, the valve core 52 moves along the valve body 51, thereby changing the communication area between the first inlet 511 and the liquid outlet 513, so that the flow rate of the oil passing through the hydraulic switch valve 5 changes, and the flow rate of the oil delivered to the nozzle 7 changes.

[0083] It should be noted that when the opening of the first outlet branch 21 increases, the amount of oil in the first outlet branch 21 increases, which increases the oil pressure at the second inlet 512, and then increases the pressure difference between the first inlet 511 and the second inlet 512. The distance that the valve core 52 moves relative to the valve body 51 increases, the connecting area between the first inlet 511 and the liquid outlet 513 increases, and the flow rate of the oil delivered to the nozzle 7 increases.

[0084] It should be noted that when the oil temperature remains unchanged, since the valve core 52 is connected to the return spring 53, the return spring 53 will generate elastic force when the valve core 52 is compressing the return spring 53. Therefore, when the thrust of the oil entering the drive space 54 through the second inlet 512 on the valve core 52 (the pressure of the oil in the drive space 54 on the valve core 52) is equal to the elastic force of the return spring 53, the valve core 52 will no longer move.

[0085] like Figure 5 and Figure 6 As shown, as the engine power further increases, the temperature of the engine oil further increases. When the temperature of the engine oil that passes through the oil pump 1 and reaches the engine main oil gallery 2 is greater than the second preset value, the engine oil causes the thermostat 3 to fully open, and the pressure of the engine oil that enters the control oil gallery 4 through the first outlet branch 21 is the maximum, so that the oil pressure at the second inlet 512 reaches the maximum; the engine oil at the second inlet 512 acts on Figure 6 In the driving space 54 of the hydraulic switch valve 5, the thrust of the oil in the driving space 54 on the valve core 52 can be further increased, so that the valve core 52 moves further until the valve core 52 is fully connected with the liquid outlet 513. At this time, the flow rate of the engine main oil channel 2 flowing to the nozzle 7 through the hydraulic switch valve 5 is the largest.

[0086] In combination with the above control process, it can be seen that in the present application, the temperature of the engine oil is combined to achieve precise control of the flow rate of the engine oil flowing into the nozzle 7, avoid the problem of excessive cooling or insufficient cooling of the piston, make the nozzle spray reasonable, ensure the piston cooling effect, and improve the economy of the engine fuel.

[0087] In addition, an engine is disclosed in an embodiment of the utility model, including a nozzle for piston cooling and a control system of the nozzle, wherein the control system of the nozzle is the oil injection control system for piston cooling disclosed in the above embodiment. Therefore, the engine with the control system of the nozzle also has all the above-mentioned technical effects, which will not be repeated here one by one.

[0088] In addition, a vehicle is also disclosed in an embodiment of the utility model, including the engine disclosed in the above embodiment. Therefore, the vehicle with the engine also has all the above technical effects, which will not be described one by one here.

[0089] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0090] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A piston cooling oil injection control system, characterized in that: include: An engine main oil channel (2), wherein the inlet of the engine main oil channel (2) is connected to an engine oil pump (1); A control oil passage (4), wherein a first outlet branch (21) of the engine main oil passage (2) is connected to a liquid inlet of the control oil passage (4); a temperature sensing control component, the temperature sensing control component being connected to a first outlet branch (21) of the engine main oil passage (2) and the control oil passage (4), the temperature sensing control component being capable of changing a flow area from the first outlet branch (21) to the control oil passage (4) according to the temperature of the oil in the engine main oil passage (2); A hydraulic switch valve (5), wherein the second outlet branch (22) of the engine main oil channel (2) is connected to the first inlet (511) of the hydraulic switch valve (5), the second inlet (512) of the hydraulic switch valve (5) is connected to the outlet of the control oil channel (4), and the liquid outlet (513) of the hydraulic switch valve (5) is used to communicate with the nozzle (7).

2. The oil injection control system for piston cooling according to claim 1, characterized in that: The temperature sensing control component is a thermostat (3); The inlet of the thermostat (3) is connected to the first outlet branch (21) of the main oil channel (2) of the engine, and the outlet of the thermostat (3) is connected to the control oil channel (4); the thermostat (3) changes the connection size between the inlet of the thermostat (3) and the outlet of the thermostat (3) according to the oil temperature in the main oil channel (2) of the engine, thereby changing the flow area of ​​the first outlet branch (21) to the control oil channel (4).

3. The oil injection control system for piston cooling according to claim 1, characterized in that: The temperature-sensing control component is a temperature-sensing pipe with an inner diameter that can expand and contract with heat, and the temperature-sensing pipe is connected to the first outlet branch (21) and the liquid inlet of the control oil channel (4), thereby changing the flow area from the first outlet branch (21) to the control oil channel (4).

4. The oil injection control system for piston cooling according to claim 1, characterized in that: Also includes: A nozzle oil passage (6), wherein the inlet of the nozzle oil passage (6) is connected to the liquid outlet (513), and the outlet of the nozzle oil passage (6) is used to communicate with the nozzle (7).

5. The oil injection control system for piston cooling according to any one of claims 1 to 4, characterized in that: The hydraulic switch valve (5) comprises: The valve body (51), the first inlet (511), the second inlet (512) and the liquid outlet (513) are all through holes penetrating the wall thickness of the valve body (51); A valve core (52), wherein the valve core (52) is installed inside the valve body (51) and is capable of moving inside the valve body (51) under the driving action of the oil in the first inlet (511) and the second inlet (512), so as to adjust the communication area between the first inlet (511) and the liquid outlet (513).

6. The oil injection control system for piston cooling according to claim 5, characterized in that: The hydraulic switch valve (5) further comprises: A return spring (53), along the moving direction of the valve core (52), one end of the valve core (52) is pressed against the valve body (51) through the return spring (53); a driving space (54) is provided between the other end of the valve core (52) and the valve body (51), and the driving space (54) is connected to the second inlet (512).

7. The oil injection control system for piston cooling according to claim 6, characterized in that: The first inlet (511) and the liquid outlet (513) are located on both sides of the valve core (52) and are arranged in a staggered manner; and the valve core (52) is provided with an annular groove (521), and the first inlet (511) and the liquid outlet (513) can be connected through the annular groove (521).

8. The oil injection control system for piston cooling according to claim 7, characterized in that: The distance between the liquid outlet (513) and the return spring (53) is smaller than the distance between the first inlet (511) and the return spring (53), and along the moving direction of the valve core (52), the distance between the liquid outlet (513) and the first inlet (511) is smaller than the width of the annular groove (521).

9. An engine comprising a nozzle for piston cooling and a control system for the nozzle, characterized in that: The control system of the nozzle is an oil injection control system for piston cooling as described in any one of claims 1 to 8.

10. A vehicle comprising an engine, characterized in that: The engine is the engine as claimed in claim 9.

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