CN107489510B - Nozzle structure, engine and vehicle that have it - Google Patents

Abstract

The invention provides a nozzle structure, an engine with the same and a vehicle with the same. The nozzle structure includes: a nozzle body having a flow passage with an inlet and an outlet; the temperature sensitive element with the functions of expansion with heat and contraction with cold is positioned in the flow passage; the shutoff piece, the shutoff piece is movable setting for nozzle main part, and the one end of temperature sensing element is installed in the passageway that overflows, and the other end of temperature sensing element is connected with the shutoff piece so that the shutoff piece opens or the shutoff import. The nozzle structure of the present invention can control the opening or closing of the inlet according to the temperature of the engine.

Description

Nozzle structure, engine and vehicle that have it

Technical Field

The invention relates to the technical field of engines, in particular to a nozzle structure, an engine with the nozzle structure and a vehicle with the nozzle structure.

Background

With the increasing popularity of direct injection supercharged engines, the temperature in the engine cylinder is higher and higher. The problems of cylinder pulling, cylinder burning or cylinder explosion and the like easily occur when the cylinder and the piston of the engine continuously work at high temperature, so that the piston and a combustion chamber need to be cooled by a nozzle structure, and the normal operation of the piston is ensured.

In the prior art, a ball valve type nozzle structure is mostly adopted to cool a piston and a combustion chamber. The nozzle structure controls the ball valve to open or close according to the pressure change in the main oil passage, and is difficult to adapt to the specific working conditions of the piston and the combustion chamber.

Specifically, when the engine is in cold start, the oil pressure in the main oil duct is high, the opening pressure of the ball valve is reached, the nozzle structure starts to spray oil to cool the piston, but the temperature of the combustion chamber is not increased at the moment, so that the cooling effect cannot be achieved, insufficient combustion is easily caused, the oil consumption is increased, and the emission pollution is caused. When the engine is in a hot idle state, the temperature of the piston is high, but the oil pressure in the main oil duct is low, so that the opening pressure of the ball valve is not reached, the nozzle does not spray oil, and the piston cannot be cooled.

Disclosure of Invention

A primary object of the present invention is to provide a nozzle structure, an engine and a vehicle having the same, which controls opening and closing of an inlet according to a temperature of the engine.

In order to achieve the above object, according to one aspect of the present invention, there is provided a nozzle structure including: a nozzle body having a flow passage with an inlet and an outlet; the temperature sensitive element with the functions of expansion with heat and contraction with cold is positioned in the flow passage; the shutoff piece, the shutoff piece is movable setting for nozzle main part, and the one end of temperature sensing element is installed in the passageway that overflows, and the other end of temperature sensing element is connected with the shutoff piece so that the shutoff piece opens or the shutoff import.

Further, the flow passage comprises a matching section, and the blocking piece is provided with a first state matched with the matching section to block the inlet and a second state disengaged from the matching section to open the inlet.

Further, the nozzle structure also comprises an elastic element arranged between the temperature sensitive element and the blocking piece, and the blocking piece is connected with the temperature sensitive element through the elastic element.

Further, the nozzle structure also comprises a pushing piece arranged between the temperature sensitive element and the plugging piece, the elastic element is sleeved on the periphery of the pushing piece, and the pushing piece has a third state abutting against the plugging piece and a fourth state separated from the plugging piece.

Furthermore, the nozzle structure also comprises a support piece which is arranged in the overflowing channel and connected with the temperature sensitive element, and the temperature sensitive element is fixed in the overflowing channel through the support piece.

Further, the nozzle body comprises a reducing section and a connecting section connected with the reducing section, and the diameter of the outer peripheral surface of the reducing section is smaller than that of the outer peripheral surface of the connecting section.

Furthermore, the overflowing channel comprises a first hole section and a second hole section which are communicated with each other, an included angle is formed between the central line of the second hole section and the central line of the first hole section so as to form an outlet on the circumferential side wall of the nozzle body, the temperature sensitive element is arranged in the first hole section, and a part of the first hole section forms a matching section of the overflowing channel.

Further, the temperature sensitive element comprises a body made of paraffin material and a shell sleeved outside the body.

According to another aspect of the present invention, there is provided an engine comprising a main oil gallery and a nozzle structure connected to the main oil gallery, the nozzle structure being as described above.

According to a third aspect of the present invention, there is provided a vehicle including a vehicle body and an engine provided in the vehicle body, the engine being the aforementioned engine.

By applying the technical scheme of the invention, the temperature sensitive element with the functions of expansion with heat and contraction with cold expands or contracts along with the temperature change of the temperature sensitive element, and the length of the temperature sensitive element is changed, so that the plugging member connected with the temperature sensitive element is driven to move, and the plugging member opens or plugs the inlet of the overflowing channel. When the nozzle structure is used for an engine, heat of the engine is transferred to the nozzle structure connected with the main oil duct through the main oil duct and oil in the main oil duct, so that the length of the temperature sensitive element is changed along with the temperature of the engine, and the opening and closing of an inlet are controlled according to the temperature change of the engine. When the temperature of oil in the main oil duct is increased to a preset value, the blocking piece is disengaged from the inlet so that the overflowing channel is communicated with the main oil duct, the oil enters from the inlet and is sprayed out from the outlet, and the piston is cooled; when the temperature in the main oil duct is reduced, the blocking piece blocks the inlet, and the overflowing channel is disconnected with the main oil duct, so that the opening and closing state of the nozzle structure is adapted to the specific working conditions of the piston and the combustion chamber, and the normal operation of the piston is ensured.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 shows a schematic structural view of an embodiment of a nozzle arrangement according to the present invention (with the inlet in an open state);

fig. 2 shows a schematic structural view of an embodiment of a nozzle arrangement according to the invention (in this case, the closing piece closes off the inlet opening); and

FIG. 3 illustrates a front view of the nozzle base and nozzle tube mounted to the nozzle structure shown in FIG. 2.

10. A nozzle body; 11. an overflow channel; 12. an inlet; 13. an outlet; 14. a reducing section; 15. a connecting section; 111. a mating segment; 112. a first bore section; 113. a second bore section; 20. a temperature sensitive element; 30. a blocking member; 31. a conical surface; 40. an elastic element; 50. a pusher member; 60. a support member; 70. a wrench hole; 80. a nozzle base; 90. and (4) a spray pipe.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a nozzle structure, an engine with the same and a vehicle with the same.

In an embodiment of the present invention, a vehicle includes a vehicle body and an engine disposed within the vehicle body.

In an embodiment of the present invention, an engine includes a main oil gallery and a nozzle structure connected to the main oil gallery.

In the embodiment of the invention, the nozzle structure is used for cooling the piston and the combustion chamber of the engine, namely the nozzle structure can be used as a piston cooling nozzle.

Specifically, the nozzle structure is connected with a main oil gallery of the engine. As the temperature of the piston and combustion chamber increases, the temperature of the engine changes. The oil in the main oil gallery can be sprayed out to the piston and the combustion chamber through the nozzle structure, so that the temperature of the piston and the combustion chamber is reduced.

The present embodiment provides a new nozzle structure that controls the opening and closing of the inlet port according to the temperature change of the engine, thereby adapting the open and closed state of the nozzle structure to the specific operating conditions of the piston and the combustion chamber.

As shown in fig. 1 and 2, in the embodiment of the present invention, the nozzle structure includes a nozzle body 10, a temperature sensitive element 20 having a function of expansion with heat and contraction with cold, and a blocking member 30. The nozzle body 10 has a transfer channel 11 with an inlet 12 and an outlet 13. The temperature sensitive element 20 is located in the flow passage 11. The block piece 30 is movably arranged with respect to the nozzle body 10. One end of the temperature sensitive element 20 is installed in the flow passage 11, and the other end of the temperature sensitive element 20 is connected with the blocking member 30 so that the blocking member 30 opens or blocks the inlet 12.

Through the arrangement, the temperature sensitive element 20 with the functions of expansion with heat and contraction with cold expands or contracts along with the temperature change of the temperature sensitive element, and the length of the temperature sensitive element is changed, so that the plugging piece 30 connected with the temperature sensitive element is driven to move, and the plugging piece 30 opens or plugs the inlet 12 of the overflowing channel 11. When the nozzle structure is used for an engine, heat of the engine is transferred to the nozzle structure connected with the main oil gallery through the main oil gallery and oil in the main oil gallery, so that the length of the temperature sensitive element 20 is changed along with the temperature of the engine, and the opening and closing of an inlet are controlled according to the temperature change of the engine. When the temperature of oil in the main oil gallery is raised to a preset value, the blocking piece 30 is disengaged from the inlet 12 so that the overflowing channel 11 is communicated with the main oil gallery, the oil enters from the inlet 12 and then is sprayed out through the outlet 13, and the piston is cooled; when the temperature in the main oil gallery is reduced, the blocking piece 30 blocks the inlet 12, and the overflowing channel 11 is disconnected with the main oil gallery, so that the opening and closing state of the nozzle structure is adapted to the specific working conditions of the piston and the combustion chamber, and the normal operation of the piston is ensured.

Specifically, at the time of cold start of the engine, the temperatures of the piston and the combustion chamber are not increased yet, accordingly, the temperature of the engine is low, and the temperature sensitive element 20 is in a contracted state, so that the blocking piece 30 connected thereto is blocked at the inlet 12 of the transfer passage 11. At this time, although the oil pressure in the main gallery is high, the oil in the main gallery does not enter the transfer passage 11 through the inlet 12. Therefore, when the temperature of the combustion chamber is lower, the nozzle structure can be prevented from injecting oil, and the problem that the exhaust emission exceeds the standard due to insufficient combustion is avoided.

At the time of engine hot idling, the temperature of the piston and the combustion chamber is increased, and accordingly, the temperature of the engine is increased, and at this time, although the pressure in the main oil gallery is low, the temperature sensitive element 20 is expanded and extended in length, thereby driving the blocking piece 30 to open the inlet 12 of the transfer passage 11. Thus, oil in the main oil gallery enters the flow passage 11 from the inlet 12 and exits from the outlet 13, which causes the nozzle arrangement to spray oil, cooling the piston and combustion chamber. In this way, in the case where the combustion chamber temperature is high but the pressure in the main oil gallery is insufficient, the piston and the combustion chamber can still be cooled using the nozzle structure of the present embodiment.

In the same way, when the engine works normally, the temperature of the piston and the combustion chamber is high, the temperature sensitive element 20 expands to drive the blocking piece 30 to open the inlet 12 of the overflowing channel 11, so that the nozzle structure injects oil to cool the piston and the combustion chamber. Meanwhile, the temperature sensitive element 20 can also adjust the opening and closing degree of the blocking piece 30 according to the temperature condition of the engine so as to adapt to specific working conditions.

Specifically, as shown in fig. 1 and 2, a clearance is provided between the temperature sensitive element 20 and the inner wall of the transfer passage 11 to ensure that when the blocking piece 30 opens the inlet 12, the oil in the main oil gallery can flow to the outlet 13 through the clearance between the temperature sensitive element 20 and the inner wall of the transfer passage 11.

As shown in fig. 1, in the embodiment of the present invention, the flow passage 11 includes a fitting section 111. The blocking piece 30 has a first state engaged with the engaging section 111 to block the inlet 12 and a second state disengaged from the engaging section 111 to open the inlet 12.

In the above arrangement, since the flow passage 11 includes the engaging section 111, the inlet 12 can be more reliably blocked by the blocking member 30 engaging with the engaging section 111 in the first state, and the inlet 12 can be more reliably opened by the blocking member 30 disengaging from the engaging section 111 in the second state.

Of course, in alternative embodiments, the flow passage 11 may not be provided with the fitting section 111. At this time, the closing member 30 may close the inlet 12 on the end surface of the nozzle body 10 on the side where the inlet 12 is located, that is, the inlet 12 is closed by the end surface of the closing member 30 facing the nozzle body 10 being engaged with the end surface of the nozzle body 10.

Preferably, as shown in fig. 1, in the embodiment of the present invention, the fitting section 111 is a tapered hole section, and the blocking member 30 has a tapered surface 31 adapted to the fitting section 111.

In the above arrangement, the mating segment 111 is a tapered bore segment. The conical hole section and the conical surface 31 of the plugging piece 30 form surface-surface matching, and the inlet 12 can be reliably plugged.

Furthermore, the arrangement can also control the oil flow entering the overflow channel 11 according to the temperature conditions of the piston and the combustion chamber, so that the oil injection quantity of the nozzle structure is adaptive to the temperature conditions of the piston and the combustion chamber. Specifically, since the fitting section 111 is a tapered hole section, when the plugging member 30 moves from the position (i.e., the position shown in fig. 2) for plugging the inlet 12 to the direction for opening the inlet 12, the gap between the tapered surface 31 of the plugging member 30 and the hole wall of the tapered hole section gradually increases, and the flow rate of the oil liquid also gradually increases with the increase of the gap. And the degree of opening of the closure 30 is related to the degree of expansion of the temperature sensitive element 20. When the temperature rise of the piston and the combustion chamber is small, the expansion degree of the temperature sensitive element 20 is small, accordingly, the moving distance of the plugging piece 30 towards the direction of opening the inlet 12 is small, the clearance between the conical surface 31 of the plugging piece 30 and the hole wall of the conical hole section is small, and therefore the oil flow is also small. As the temperature of the piston and the combustion chamber increases, the expansion degree of the temperature sensitive element 20 increases, so that the gap between the conical surface 31 of the plugging piece 30 and the hole wall of the conical hole section increases gradually, and therefore the flow rate of the oil liquid also increases gradually.

Of course, in an alternative embodiment not shown in the drawings, the fitting section 111 may also be a straight section having a smaller aperture than the flow channel 11 where the temperature sensitive element 20 is located. The block piece 30 has an outer surface that mates with the straight bore section.

In an embodiment of the invention, shown in fig. 1, a conical bore section is located at the inlet 12, the bore diameter of the conical bore section decreasing in a direction away from the inlet 12.

Specifically, the large diameter end of the conical bore section forms an inlet 12, and the bore diameter of the conical bore section gradually decreases from the inlet 12 to the outlet 13. When the temperature sensitive element 20 is thermally expanded, the plugging member 30 is driven to move towards the direction of increasing aperture of the conical hole section so that the plugging member 30 opens the inlet 12.

Through the arrangement, the acting force direction of the oil in the main oil gallery to the plugging piece 30 is consistent with the direction of the plugging piece 30 for plugging the inlet 12, and the inlet 12 can be plugged more reliably by using the pressure in the main oil gallery. In this way, the blocking piece 30 only opens the flow passage 11 under the driving of the temperature sensitive element 20, so that the blocking piece 30 is prevented from opening the inlet 12 under the action of the oil hydraulic pressure in the main oil gallery, and blocking failure caused by the pressure rise of the main oil gallery when the engine is in cold start is avoided.

As shown in fig. 1, in the embodiment of the present invention, the transfer passage 11 includes a first hole section 112 and a second hole section 113 communicating with each other. The centerline of the second bore section 113 is angled from the centerline of the first bore section 112 to form the outlet 13 on the circumferential sidewall of the nozzle body 10. The temperature sensitive element 20 is disposed within a first bore section 112, a portion of the first bore section 112 forming a mating section 111 of the flow channel 11.

In the above arrangement, because the center lines of the first hole section 112 and the second hole section 113 which are communicated with each other form an included angle, the arrangement can change the flowing direction of the oil in the flow passage 11, so that the spraying direction of the oil can be adapted to the direction of the piston and the combustion chamber.

Specifically, as shown in FIG. 1, the centerline of the first bore segment 112 coincides with the centerline of the nozzle body 10. The angle between the centerline of the second bore section 113 and the centerline of the first bore section 112 is 90. The end of the first bore section 112 remote from the second bore section forms the inlet 12 and the portion of the first bore section 112 adjacent the inlet 12 forms the mating section 111.

The above arrangement facilitates the machining of the flow passage 11 and the mating section 111.

Optionally, the transfer passage comprises a plurality of second bore segments 113 in communication with the first bore segments 112, the plurality of second bore segments 113 being spaced circumferentially of the nozzle body 10, the plurality of second bore segments 113 forming a plurality of outlets 13 in the circumferential sidewall of the nozzle body 10.

As shown in fig. 3, in the embodiment of the present invention, the nozzle structure further includes a nozzle seat 80 disposed outside the nozzle body 10, and a nozzle tube 90 connected to the nozzle seat 80, wherein an inner through hole of the nozzle tube 90 is communicated with the outlet 13.

With the above arrangement, the oil flowing through the flow passage 11 enters the inner through hole of the nozzle 90 communicating with the outlet 13 and is sprayed from the nozzle of the nozzle 90 toward the direction of the piston and the combustion chamber, so that the spraying direction of the oil can be controlled through the nozzle 90. This facilitates adjustment of the oil discharge direction by the installation direction of the nozzle 90 when assembling the nozzle structure.

Preferably, the nozzle holder 80 and the nozzle 90 are detachably connected to the nozzle body 10.

In this way, different sizes of nozzle holders 80 and nozzles 90 may be replaced to adapt the nozzle arrangement to different engine models.

Alternatively, as shown in fig. 1 and 2, the nozzle body 10 is further provided with a groove on the circumferential outer wall thereof, the groove communicating with the second bore section 113, and the oil flowing out from the plurality of outlets 13 is converged to the inlet of the nozzle 90 and is sprayed out through the groove.

As shown in fig. 1 and 2, in the embodiment of the present invention, the nozzle structure further includes a support 60 disposed in the flow channel 11 and connected to the temperature sensitive element 20, and the temperature sensitive element 20 is fixed in the flow channel 11 by the support 60.

The above arrangement may facilitate the fixing of the temperature sensitive element 20.

Specifically, the support 60 is disposed within the first bore section 112.

Specifically, an end of the temperature sensitive element 20 remote from the block piece 30 is connected with the support 60. The nozzle body 10 has an internal through bore, a portion of which forms a first bore section 112, and the support 60 is secured by an interference fit at an end of the first bore section 112 remote from the inlet 12. The second bore section 113 is located on the bore wall of the first bore section 112 between the support 60 and the inlet 12.

The nozzle structure is simple in structure and convenient to manufacture. Also, the support 60 at the end of the first bore section 112 remote from the inlet 12 does not affect the flow of oil in the transfer passage 11.

Optionally, another portion of the interior bore of the nozzle body 10 forms a wrench bore 70, the wrench bore 70 cooperating with a wrench when installing the nozzle structure to facilitate installation of the nozzle structure.

Of course, in an alternative embodiment not shown in the drawings, the first hole section 112 may be a blind hole, and one end of the temperature sensitive element 20 is directly connected to the bottom wall of the first hole section 112, so as to fix the temperature sensitive element 20 in the flow passage 11.

As shown in fig. 1 and 2, in the embodiment of the present invention, the nozzle body 10 includes the reduced diameter section 14 and the connection section 15 connected to the reduced diameter section 14, and the diameter of the outer peripheral surface of the reduced diameter section 14 is smaller than the diameter of the outer peripheral surface of the connection section 15. The inner through-hole of the reduced-diameter section 14 and the inner through-hole of the connecting section 15 form a first bore section 112, and a second bore section 113 opens onto the connecting section 15.

In the above arrangement, the nozzle body 10 includes the reduced diameter section 14 and the connecting section 15 connected to the reduced diameter section 14, so that when the nozzle structure is mounted to an engine, the reduced diameter section 14 extends into the main oil gallery, and the reduced diameter section 14 has a smaller diameter, thereby reducing the flow blocking effect on oil in the main oil gallery.

Preferably, as shown in fig. 1 and 2, the connection section 15 has an external thread provided on a pipe section of the connection section 15 where the second bore section 113 is not provided.

The external thread is arranged on the connecting section 15 to facilitate the connection of the nozzle structure and the main oil gallery.

As shown in fig. 1 and 2, in the embodiment of the present invention, the nozzle structure further includes an elastic member 40 disposed between the temperature sensitive member 20 and the blocking member 30, and the blocking member 30 is connected to the temperature sensitive member 20 through the elastic member 40.

Through the arrangement, when the temperature of the engine is reduced, the temperature sensitive element 20 contracts, the length is shortened, the elastic element 40 stretches, the plugging piece 30 can be reliably plugged at the inlet 12 under the action of the tensile force of the elastic element 40, and meanwhile, the temperature sensitive element 20 or the plugging piece 30 can be prevented from being broken or deformed under the action of the tensile force. Therefore, compared with the case where the temperature sensitive element 20 is directly connected to the sealing member 30, the above arrangement can not only reliably seal the inlet 12 with the sealing member 30 at low temperature, but also prevent the temperature sensitive element 20 or the sealing member 30 from being damaged due to excessive contraction of the temperature sensitive element 20 at low temperature.

In addition, the blocking piece 30 can open the inlet 12 only when the elastic force of the elastic element 40 is larger than the pressure of the oil in the main oil gallery on the blocking piece 30. The magnitude of the elastic force of the elastic member 40 is proportional to the amount of compression of the elastic member 40, and therefore, the inlet 12 can be opened only when the engine temperature reaches a predetermined value, such that the extension amount of the temperature sensitive member 20 and the compression amount of the elastic member 40 reach the predetermined values.

Preferably, as shown in fig. 1 and 2, in the embodiment of the present invention, the nozzle structure further includes a pushing member 50 disposed between the temperature sensitive element 20 and the blocking member 30. The elastic element 40 is sleeved on the periphery of the pushing piece 50, and the pushing piece 50 has a third state of abutting against the plugging piece 30 and a fourth state of separating from the plugging piece 30.

With the above arrangement, when the temperature of the piston and the combustion chamber rises, the temperature sensitive element 20 expands to drive the pushing member 50 to move towards the direction of the blocking member 30 (i.e. downward movement in fig. 1 and 2), and when the temperature of the temperature sensitive element 20 rises to a predetermined value, the pushing member 50 abuts against the blocking member 30 and pushes the blocking member 30 to move downward to open the inlet 12. In this way, the impeller 50 ensures that the nozzle arrangement reliably opens the inlet 12 for reliable cooling when the temperatures of the piston and combustion chamber are high, even if the oil pressure in the main oil gallery is high. When the temperature of the piston and the combustion chamber is reduced, the temperature sensitive element 20 contracts to drive the pushing piece 50 to move towards the direction far away from the plugging piece 30, and the pushing piece 50 is separated from the plugging piece 30, so that the plugging piece 30 can reliably plug the inlet 12.

Preferably, in the embodiment of the present invention, the temperature sensitive element 20 includes a body made of paraffin material and a housing covering the body. The paraffin bag with expansion on heating and contraction on cooling is formed by the body and the shell together.

The above arrangement can reduce the cost of the nozzle structure. Meanwhile, the casing is sleeved on the paraffin material, so that the appearance of the temperature sensitive element 20 can be maintained, and the paraffin material is prevented from being mixed into oil or damaged when being melted at high temperature.

Another prior art approach to cooling the piston and combustion chamber is to use a solenoid valve type piston cooling nozzle. The electromagnetic valve type piston cooling nozzle controls the opening or closing of an electromagnetic valve through an Electronic Control Unit (ECU), so as to Control the opening or closing of a special oil passage for the nozzle. Although the electromagnetic valve type piston cooling nozzle can effectively control the opening and closing time of the nozzle, the nozzle is closed when an engine is in cold start, and is opened when the engine is in hot idle speed, the electromagnetic valve type piston cooling nozzle needs to be additionally provided with a special oil duct for the nozzle in an engine cylinder body, is complex in structure, limited in arrangement and high in cost, and can increase the weight of the engine.

Compared with a solenoid valve type piston cooling nozzle, the nozzle structure is simple, other elements do not need to be added in the engine, and the influence on other parts of the engine is small.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the temperature sensitive element with the functions of expansion with heat and contraction with cold expands or contracts along with the temperature change of the temperature sensitive element, and the length of the temperature sensitive element is changed, so that the plugging piece connected with the temperature sensitive element is driven to move, and the plugging piece is enabled to open or plug the inlet of the overflowing channel. When the nozzle structure is used for an engine, heat of the engine is transferred to the nozzle structure connected with the main oil duct through the main oil duct and oil in the main oil duct, so that the length of the temperature sensitive element is changed along with the temperature of the engine, and the opening and closing of an inlet are controlled according to the temperature change of the engine. When the temperature of oil in the main oil duct is increased to a preset value, the blocking piece is disengaged from the inlet so that the overflowing channel is communicated with the main oil duct, the oil enters from the inlet and is sprayed out from the outlet, and the piston is cooled; when the temperature in the main oil duct is reduced, the blocking piece blocks the inlet, and the overflowing channel is disconnected with the main oil duct, so that the opening and closing state of the nozzle structure is adapted to the specific working conditions of the piston and the combustion chamber, and the normal operation of the piston is ensured.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the 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 a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A nozzle arrangement, characterized in that the nozzle arrangement comprises:

a nozzle body (10) having a transfer channel (11) with an inlet (12) and an outlet (13);

the temperature sensitive element (20) with the functions of expansion with heat and contraction with cold is positioned in the overflowing channel (11);

a block piece (30), wherein the block piece (30) is movably arranged relative to the nozzle body (10), one end of the temperature sensitive element (20) is installed in the overflowing channel (11), and the other end of the temperature sensitive element (20) is connected with the block piece (30) so that the block piece (30) opens or blocks the inlet (12);

the nozzle structure further includes:

an elastic element (40) disposed between the temperature sensitive element (20) and the block piece (30), the block piece (30) being connected to the temperature sensitive element (20) by the elastic element (40);

the nozzle structure further comprises a pushing piece (50) arranged between the temperature sensitive element (20) and the plugging piece (30), the elastic element (40) is sleeved on the periphery of the pushing piece (50), and the pushing piece (50) has a third state abutting against the plugging piece (30) and a fourth state separated from the plugging piece (30).

2. A nozzle arrangement according to claim 1, wherein the transfer channel (11) comprises an engagement section (111), the closure (30) having a first state engaging the engagement section (111) to close the inlet (12) and a second state disengaging the engagement section (111) to open the inlet (12).

3. Nozzle arrangement according to claim 1 or 2, characterized in that the nozzle arrangement further comprises a support (60) arranged in the through-flow channel (11) and connected to the temperature sensitive element (20), the temperature sensitive element (20) being fixed in the through-flow channel (11) by means of the support (60).

4. The nozzle structure according to claim 1 or 2, wherein the nozzle body (10) includes a reduced diameter section (14) and a connecting section (15) connected to the reduced diameter section (14), and a diameter of an outer peripheral surface of the reduced diameter section (14) is smaller than a diameter of an outer peripheral surface of the connecting section (15).

5. A nozzle arrangement according to claim 1 or 2, characterized in that the transfer channel (11) comprises a first bore section (112) and a second bore section (113) communicating with each other, the centre line of the second bore section (113) and the centre line of the first bore section (112) being angled to form the outlet (13) in the circumferential side wall of the nozzle body (10), the temperature sensitive element (20) being arranged in the first bore section (112), a portion of the first bore section (112) forming the mating section (111) of the transfer channel (11).

6. Nozzle arrangement according to claim 1 or 2, wherein the temperature sensitive element (20) comprises a body made of a paraffin material and a housing which is fitted over the body.

7. An engine comprising a main oil gallery and a nozzle arrangement connected to the main oil gallery, wherein the nozzle arrangement is as claimed in any one of claims 1 to 6.

8. A vehicle comprising a vehicle body and an engine disposed within the vehicle body, wherein the engine is the engine of claim 7.

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