A piston cooling nozzle and engine

Abstract

The present application relates to a kind of piston cooling nozzle and engine, and the piston cooling nozzle includes nozzle valve body and plunger body, nozzle valve body is arranged into oil inlet and oil outlet, oil inlet and oil outlet are respectively communicated with the valve cavity of nozzle valve body, plunger body is elastically arranged in valve cavity, plunger body is arranged with the oil storage cavity communicated with oil inlet, and the side wall of plunger body opposite to oil outlet is provided with flow regulating port, flow regulating port is used to be communicated with oil outlet when plunger body is moved to the first preset position in the direction away from oil inlet relative to nozzle valve body, the width of flow regulating port gradually increases from the end away from oil inlet. The piston cooling nozzle described above changes the output flow of piston cooling nozzle by the design of the shape and size of flow regulating port, so that the cooling demand of piston under different working conditions can be met with the change of oil pressure, and the structure is simple and does not depend on electronic control system, and the requirement for layout space is low.

Description

Technical Field

[0001] This invention relates to the field of engine technology, and in particular to a piston cooling nozzle and an engine. Background Technology

[0002] Piston cooling nozzles are important components that cool the piston inside the engine cavity and reduce the piston's thermal load.

[0003] There are two main types of existing piston cooling nozzles. One type of piston cooling nozzle only has the function of opening and closing, which cannot meet the needs of the nozzle flow rate to change with the oil pressure. This can easily lead to over-cooling of the piston at low speeds. The other type of piston cooling nozzle relies on a solenoid valve to control the flow rate. This requires a separate oil passage interface to install the solenoid valve, as well as sufficient space for the solenoid valve installation and wiring harness. This results in a large space requirement and a complex electrical control system. Summary of the Invention

[0004] The first objective of this invention is to provide a piston cooling nozzle that has a simple structure, requires little space for arrangement, and can achieve output flow rate that varies randomly with oil pressure.

[0005] A second objective of the present invention is to provide an engine including the aforementioned piston cooling nozzle.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A piston cooling nozzle, comprising:

[0008] The nozzle valve body is provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet are respectively connected to the valve cavity of the nozzle valve body;

[0009] A plunger body is elastically disposed within the valve chamber. The plunger body has an oil storage chamber communicating with the oil inlet. A flow regulating port is provided on the side wall of the plunger body opposite to the oil outlet. The flow regulating port is used to communicate with the oil outlet when the plunger body moves away from the oil inlet relative to the nozzle valve body to a first preset position. The width of the flow regulating port gradually increases from the end away from the oil inlet.

[0010] In one embodiment of this application, the nozzle valve body is provided with an oil drain port communicating with the valve cavity of the nozzle valve body. The oil drain port is located on the side of the oil outlet away from the oil inlet. The oil drain port is used to communicate with the flow regulating port when the plunger body moves away from the oil inlet relative to the nozzle valve body to a second preset position.

[0011] In one embodiment of this application, an anti-rotation fit structure is provided between the plunger body and the nozzle valve body, so that the plunger body can and can only slide back and forth relative to the nozzle valve body in a preset direction.

[0012] In one embodiment of this application, a nozzle tube is further included, which is connected to the oil outlet.

[0013] In one embodiment of this application, the width of the oil outlet is greater than the width of the end of the flow regulating port away from the oil inlet.

[0014] In one embodiment of this application, the nozzle valve body includes a valve body and a plug. The valve body has a hollow cavity that extends through the valve body. The plug cooperates with the valve body to seal one end opening of the hollow cavity. The other end opening of the hollow cavity is the oil inlet. The oil outlet is provided on the side wall of the valve body.

[0015] In one embodiment of this application, a compression spring is provided between the end of the plunger body away from the oil inlet and the nozzle valve body.

[0016] In one embodiment of this application, the flow regulating port includes, in sequence, an opening section, a rapid increase section, a stabilizing section, and a continuing increase section, starting from the end furthest from the oil inlet. The widths of the opening section, the rapid increase section, the stabilizing section, and the continuing increase section increase sequentially. The rate of increase in width of the rapid increase section and the continuing increase section is greater than the rate of increase in width of the opening section and the stabilizing section.

[0017] In one embodiment of this application, a mounting plate is also included, which is disposed on the nozzle valve body.

[0018] An engine comprising a piston cooling nozzle as described in any of the above.

[0019] As can be seen from the above technical solution, the present invention discloses a piston cooling nozzle, which includes a nozzle valve body and a plunger body. The nozzle valve body is provided with an oil inlet and an oil outlet, which are respectively connected to the valve chamber of the nozzle valve body. The plunger body is elastically disposed in the valve chamber and is provided with an oil storage chamber connected to the oil inlet. A flow regulating port is provided on the side wall of the plunger body opposite to the oil outlet. The flow regulating port is used to connect with the oil outlet when the plunger body moves away from the oil inlet relative to the nozzle valve body to a first preset position. The width of the flow regulating port gradually increases from the end away from the oil inlet. It should be noted that since the required output flow of the oil outlet of the piston cooling nozzle does not change linearly with the engine speed, the change in the width of the above-mentioned flow regulating port is not uniform.

[0020] In application, as the oil pressure at the inlet increases, the plunger moves away from the inlet under the pressure of the oil. When the flow regulating port on the plunger partially overlaps with the outlet, the piston cooling nozzle begins to spray oil outward. At this time, the width of the flow regulating port is relatively narrow, and the amount of oil sprayed by the piston cooling nozzle is small. As the oil pressure at the inlet increases, the plunger continues to move away from the inlet, and the width of the flow regulating port gradually increases, and the amount of oil sprayed by the piston cooling nozzle also increases. That is, by designing the shape and size of the flow regulating port, the output flow of the piston cooling nozzle can change with the change of oil pressure, thereby meeting the cooling needs of the piston under different working conditions. The structure is simple and does not rely on an electronic control system, and the space requirements for arrangement are low. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 An exploded view of the piston cooling nozzle provided in an embodiment of the present invention;

[0023] Figure 2 A cross-sectional view of a piston cooling nozzle provided in an embodiment of the present invention;

[0024] Figure 3 This is a front view of the plunger body of a piston cooling nozzle according to an embodiment of the present invention;

[0025] Figure 4 This is a cross-sectional view of the piston cooling nozzle provided in an embodiment of the present invention when the oil pressure is relatively low;

[0026] Figure 5 A schematic diagram showing the relative position of the piston cooling nozzle and the oil outlet when the oil pressure is low, provided in an embodiment of the present invention.

[0027] Figure 6 This is a cross-sectional view of the piston cooling nozzle provided in an embodiment of the present invention when the oil pressure is high;

[0028] Figure 7 This is a schematic diagram showing the relative positions of the piston cooling nozzle, the oil outlet, and the oil drain port when the oil pressure is high, according to an embodiment of the present invention.

[0029] Figure 8 A front view of the plunger body of a piston cooling nozzle provided in another embodiment of the present invention.

[0030] In the picture:

[0031] 1 is the nozzle valve body; 110 is the valve body; 120 is the plug; 111 is the oil inlet; 112 is the oil outlet; 113 is the oil drain port;

[0032] 2 is the plunger body; 201 is the oil reservoir; 202 is the flow regulating port; 2021 is the opening section; 2022 is the rapid increase section; 2023 is the stabilization section; 2024 is the continued increase section;

[0033] 3 is a compression spring; 4 is a nozzle tube; 5 is a mounting plate. Detailed Implementation

[0034] One of the core aspects of this invention is to provide a piston cooling nozzle. The structural design of this piston cooling nozzle makes it simple in structure, requires little space for arrangement, and can achieve output flow rate that varies randomly with oil pressure.

[0035] Another core aspect of this invention is to provide an engine that includes the aforementioned piston cooling nozzle.

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Please see Figures 1 to 3 , Figure 1 This is an exploded view of the piston cooling nozzle provided in an embodiment of the present invention. Figure 2 This is a cross-sectional view of a piston cooling nozzle provided in an embodiment of the present invention. Figure 3 This is a front view of the plunger body of the piston cooling nozzle provided in an embodiment of the present invention.

[0038] An embodiment of the present invention discloses a piston cooling nozzle, which includes a nozzle valve body 1 and a plunger body 2.

[0039] The nozzle valve body 1 is provided with an oil inlet 111 and an oil outlet 112, which are respectively connected to the valve cavity of the nozzle valve body 1. The oil inlet 111 is used to connect the valve cavity of the nozzle valve body 1 to the main oil passage, and the oil outlet 112 is used to spray engine oil onto the piston head. The shape of the oil outlet 112 includes, but is not limited to, circular, elliptical, and polygonal shapes. The plunger body 2 is elastically disposed in the valve cavity and is provided with an oil storage chamber 201 connected to the oil inlet 111. The plunger body 2 and the oil outlet 112 are connected to each other. A flow regulating port 202 is provided on the side wall of the piston cooling nozzle. The flow regulating port 202 is used to communicate with the oil outlet 112 when the piston body 2 moves away from the oil inlet 111 relative to the nozzle valve body 1 to the first preset position. The width of the flow regulating port 202 gradually increases from the end away from the oil inlet 111. It should be noted that since the required output flow of the oil outlet 112 of the piston cooling nozzle does not change linearly with the engine speed, the change in the width of the flow regulating port 202 is not uniform.

[0040] Compared with the prior art, in the application of the piston cooling nozzle provided in this embodiment of the invention, as the oil pressure at the oil inlet 111 increases, the plunger body 2 moves away from the oil inlet 111 under the action of the oil pressure. When the flow regulating port 202 on the plunger body 2 partially overlaps with the oil outlet 112, the piston cooling nozzle begins to spray oil outward. When the oil pressure is low, the movement of the plunger body 2 is small. Therefore, the narrower part of the flow regulating port 202 on the plunger body 2 overlaps with the oil outlet 112, and the flow cross-sectional area of ​​the narrower part of the flow regulating port 202 is smaller than the flow cross-sectional area of ​​the oil outlet 112. Figure 4 and Figure 5 As shown, at this time, the oil injection volume of the piston cooling nozzle is relatively small. As the oil pressure at the oil inlet 111 increases, the plunger body 2 continues to move away from the oil inlet 111, and the width of the flow regulating port 202 gradually increases. The flow cross-sectional area of ​​the flow regulating port 202 relative to the oil outlet 112 gradually approaches the flow cross-sectional area of ​​the oil outlet 112, and the oil injection volume of the piston cooling nozzle also increases accordingly. When the oil pressure at the oil inlet 111 continues to increase, the widest part of the upper end of the flow regulating port 202 is opposite to the oil outlet 112. At this time, the flow cross-sectional area of ​​the flow regulating port 202 relative to the oil outlet 112 is basically equivalent to the flow cross-sectional area of ​​the oil outlet 112, and the oil output reaches its maximum. Figure 6 and Figure 7 As shown, the piston cooling nozzle, through the design of the shape and size of the flow regulating port 202, enables the output flow of the piston cooling nozzle to change with the random oil pressure, thereby meeting the cooling requirements of the piston under different working conditions. The structure is simple and does not rely on the electronic control system, and has low requirements for the arrangement space.

[0041] In one embodiment of this application, such as Figure 1 and Figure 2 As shown, the nozzle valve body 1 is provided with an oil drain port 113 communicating with the valve cavity of the nozzle valve body 1. The oil drain port 113 is located on the side of the oil outlet 112 away from the oil inlet 111. The oil drain port 113 is used to communicate with the flow regulating port 202 when the plunger body 2 moves away from the oil inlet 111 relative to the nozzle valve body 1 to the second preset position. When the pressure in the main oil passage is too high, the plunger body 2 moves away from the oil inlet 111 relative to the nozzle valve body 1 to the second preset position. At this time, the flow regulating port 202 is simultaneously connected to both the oil outlet 112 and the oil drain port 113. Figure 6 and Figure 7 As shown, excess oil is discharged into the oil pan through the drain port 113, ensuring the normal working pressure of the piston cooling nozzle. The shape and size of the drain port 113 can be the same as or different from the shape and size of the oil outlet 112, and one or more drain ports 113 can be provided.

[0042] To ensure that the flow regulating port 202 can accurately communicate with the oil outlet 112 and the oil drain port 113, in one embodiment of this application, an anti-rotation fit structure is provided between the plunger body 2 and the nozzle valve body 1, so that the plunger body 2 can slide back and forth relative to the nozzle valve body 1 in a preset direction only. The anti-rotation fit between the plunger body 2 and the nozzle valve body 1 can be achieved in a variety of ways. For example, a groove can be provided on one of the plunger body 2 and the nozzle valve body 1, and a slider can be provided on the other of the plunger body 2 and the nozzle valve body 1. The slider slides in fit with the groove. Alternatively, the cross-sections of the plunger body 2 and the nozzle valve body 1 can be non-circular, that is, the cross-sections of the plunger body 2 and the nozzle valve body 1 can be polygonal, elliptical, or waist-shaped, etc., to avoid relative rotation between the two.

[0043] like Figure 1 and Figure 2 As shown, the piston cooling nozzle also includes a nozzle tube 4, which is connected to the oil outlet 112. The other end of the nozzle tube 4 is used to spray oil onto the piston head. The nozzle tube 4 can be a straight tube, a bent tube, or an irregularly shaped tube depending on the setting position of the piston cooling nozzle.

[0044] Preferably, the width of the oil outlet 112 is greater than the width of the end of the flow regulating port 202 away from the oil inlet 111, so as to ensure that the flow area can be adjusted as the oil outlet 112 and the flow regulating port 202 move relative to each other.

[0045] like Figure 1 and Figure 2As shown, in one embodiment of this application, for ease of processing, manufacturing and assembly, the nozzle valve body 1 includes a valve body 110 and a plug 120. The valve body 110 has a hollow cavity that penetrates the valve body 110. The plug 120 cooperates with the valve body 110 to seal one end opening of the hollow cavity to form a valve cavity of the nozzle valve body 1. The other end opening of the hollow cavity is an oil inlet 111. The side wall of the valve body 110 is provided with an oil outlet 112 and an oil drain 113.

[0046] like Figure 1 and Figure 2 As shown, the plunger body 2 is elastically set inside the nozzle valve body 1 by a compression spring 3. That is, a compression spring 3 is provided between the end of the plunger body 2 away from the oil inlet 111 and the nozzle valve body 1. The compression spring 3 is not the only option for elastically setting the plunger body 2 inside the nozzle valve body 1. Other elastic devices can also be used to achieve elastic setting of the plunger body 2 inside the nozzle valve body 1, such as leaf springs, torsion springs, etc.

[0047] like Figure 3 As shown in a specific embodiment of this application, the flow regulating port 202 is generally a V-shaped groove with its tip pointing away from the oil inlet 111. Starting from the end away from the oil inlet 111, the flow regulating port 202 sequentially includes an opening section 2021, a rapid increase section 2022, a stabilizing section 2023, and a continuing increase section 2024. The widths of the opening section 2021, the rapid increase section 2022, the stabilizing section 2023, and the continuing increase section 2024 increase sequentially. Figure 3 In the illustrated embodiment, the width increase rate of the rapidly increasing segment 2022 and the continuing increasing segment 2024 is greater than the width increase rate of the opening segment 2021 and the stabilizing segment 2023. Of course, in other embodiments, the flow regulating port 202 can also have a structure with a uniform width increase rate, that is, the two sidewalls of the flow regulating port 202 are smooth slopes, such as... Figure 8 As shown.

[0048] like Figure 1 and Figure 2 As shown, the piston cooling nozzle also includes a mounting plate 5, which is disposed on the nozzle valve body 1. The mounting plate 5 is provided with mounting holes for mounting the piston cooling nozzle to the engine.

[0049] This application also provides an engine that includes a piston cooling nozzle as described in the above embodiments. Since the engine uses the piston cooling nozzle described in the above embodiments, the technical effects of the engine can be referred to the above embodiments.

[0050] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0051] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A piston cooling nozzle, characterized in that, include: The nozzle valve body is provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet are respectively connected to the valve cavity of the nozzle valve body; A plunger body is elastically disposed within the valve chamber. The plunger body has an oil storage chamber communicating with the oil inlet. A flow regulating port is provided on the side wall of the plunger body opposite to the oil outlet. The flow regulating port is used to communicate with the oil outlet when the plunger body moves away from the oil inlet relative to the nozzle valve body to a first preset position. The width of the flow regulating port gradually increases from the end away from the oil inlet, and the width of the oil outlet is greater than the width of the end of the flow regulating port away from the oil inlet.

2. The piston cooling nozzle according to claim 1, characterized in that, The nozzle valve body is provided with an oil drain port that communicates with the valve cavity of the nozzle valve body. The oil drain port is located on the side of the oil outlet away from the oil inlet. The oil drain port is used to communicate with the flow regulating port when the plunger moves away from the oil inlet relative to the nozzle valve body to a second preset position.

3. The piston cooling nozzle according to claim 1, characterized in that, An anti-rotation fit structure is provided between the plunger body and the nozzle valve body, so that the plunger body can slide back and forth relative to the nozzle valve body in a preset direction only.

4. The piston cooling nozzle according to claim 1, characterized in that, It also includes a nozzle tube, which is connected to the oil outlet.

5. The piston cooling nozzle according to any one of claims 1-4, characterized in that, The nozzle valve body includes a valve body and a plug. The valve body has a hollow cavity that extends through the valve body. The plug cooperates with the valve body to seal one end opening of the hollow cavity. The other end opening of the hollow cavity is the oil inlet. The oil outlet is provided on the side wall of the valve body.

6. The piston cooling nozzle according to any one of claims 1-4, characterized in that, A compression spring is provided between the end of the plunger body away from the oil inlet and the nozzle valve body.

7. The piston cooling nozzle according to any one of claims 1-4, characterized in that, The flow regulating port includes, in sequence, an opening section, a rapid increase section, a stabilizing section, and a continuing increase section, starting from the end furthest from the oil inlet. The widths of the opening section, the rapid increase section, the stabilizing section, and the continuing increase section increase sequentially. The rate of increase in width of the rapid increase section and the continuing increase section is greater than the rate of increase in width of the opening section and the stabilizing section.

8. The piston cooling nozzle according to any one of claims 1-4, characterized in that, It also includes a mounting plate disposed on the nozzle valve body.

9. An engine, characterized in that, Includes the piston cooling nozzle as described in any one of claims 1-8.

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