EGR valve, engine, hybrid assembly and vehicle

Abstract

The EGR valve comprises a valve body, a valve rod and a first sealing piece, the valve rod is installed in the valve body and reciprocates in the length direction of the valve rod, the first sealing piece is arranged on the valve body and comprises a first framework and a first ring, the first ring is arranged on the valve rod in a sleeving mode, and the second framework is arranged on the valve rod. The first framework is arranged on the valve body and connected with the first ring so as to support the first ring. According to the technical scheme, the first sealing piece is directly installed on the valve rod, the first sealing piece is provided with the first framework and the first ring, the first ring is in interference fit with the valve rod to achieve sealing, the first framework supports the first ring, the first sealing piece achieves framework type supporting through the structure of the first sealing piece, and therefore the sealing effect is improved. The sealing piece is not prone to loosening, corrosives and waste gas are prevented from entering the gap between the guide sleeve and the valve rod, the valve rod is prevented from being clamped, and meanwhile the situation that the waste gas enters the guide sleeve through the assembling gap to cause corrosion clamping is avoided.

Description

Technical Field

[0001] The present invention generally relates to the field of valves, and particularly to an EGR valve, an engine, a hybrid assembly, and a vehicle. Background Art

[0002] An EGR (Exhaust Gas Recirculation) valve is a mechatronic product used to control the amount of exhaust gas recirculated back to the intake system. By guiding the exhaust gas discharged from the engine combustion to the intake manifold to participate in combustion, it reduces the combustion chamber temperature, improves the engine working efficiency, improves the combustion environment, reduces the engine burden, effectively reduces the emission of NO compounds, reduces knocking, and extends the service life of each component.

[0003] Generally, an EGR valve includes a valve stem. A lower seal ring, an exhaust gasket, an upper seal ring, and a guide sleeve are sequentially sleeved on the middle of the valve stem from bottom to top. Among them, the upper and lower seal rings need to be sleeved on the valve stem through a cage to achieve the sealing fit between the sealing component and the valve stem, there is a risk of the cage loosening. At the same time, there is a risk that exhaust gas enters the guide sleeve through the installation gaps between the protective sleeve, the lower seal ring, the exhaust gasket, the upper seal ring, and the guide sleeve and the valve body, resulting in corrosion and jamming. Summary of the Invention

[0004] In view of the above defects or deficiencies in the prior art, it is desirable to provide an EGR valve, an engine, a hybrid assembly, and a vehicle.

[0005] In a first aspect, there is provided an EGR valve, comprising:

[0006] A valve body,

[0007] A valve stem, the valve stem is installed in the valve body and can reciprocate along the length direction of the valve stem,

[0008] A first seal, the first seal is arranged on the valve body,

[0009] Wherein, the first seal includes a first skeleton and a first ring, the first ring is sleeved on the valve stem, and the first skeleton is arranged on the valve body and connected to the first ring to support the first ring.

[0010] As an implementable manner, it further includes:

[0011] A guide sleeve, the guide sleeve is arranged on the valve body; the valve stem passes through the guide sleeve, a valve is provided at the end of the valve stem, and the first seal is located between the guide sleeve and the valve.

[0012] As an implementable manner, it further includes: a mounting sleeve arranged on the valve body,

[0013] The mounting sleeve is provided with a first accommodating cavity around the valve stem, the first seal is arranged in the first accommodating cavity, and the first skeleton is supported on the inner wall of the first accommodating cavity.

[0014] As an implementable manner, it further includes a second seal;

[0015] The second seal is arranged in the first accommodating cavity. The second seal includes a second skeleton and a second ring. The second ring is sleeved on the valve stem. The second skeleton is supported on the inner wall of the first accommodating cavity, and the second skeleton is connected to the second ring to support the second ring;

[0016] The first seal and the second seal are arranged at intervals along the length direction of the valve stem.

[0017] As an implementable manner, a first ventilation hole penetrating to the outside of the mounting sleeve is formed on the inner wall of the first accommodating cavity. The first ventilation hole is located between the first seal and the second seal;

[0018] The valve body is provided with a second ventilation hole communicating with the outside. The first ventilation hole and the second ventilation hole are communicated.

[0019] As an implementable manner, an annular groove is formed on the outside of the mounting sleeve. The annular groove is arranged circumferentially around the valve stem. The second ventilation hole is communicated with the annular groove;

[0020] The number of the first ventilation holes is multiple. The multiple first ventilation holes are arranged at intervals circumferentially around the valve stem. The multiple first ventilation holes are respectively communicated with the annular groove. The multiple first ventilation holes are communicated with the second ventilation hole through the annular groove.

[0021] As an implementable manner, it further includes: an annular scraping piece. The annular scraping piece is arranged on the valve body. The valve stem passes through the annular scraping piece. The annular scraping piece and the first seal are arranged at intervals along the length direction of the valve stem.

[0022] As an implementable manner, the mounting sleeve is further provided with a second accommodating cavity around the valve stem. The first accommodating cavity and the second accommodating cavity are arranged at intervals along the length direction of the valve stem;

[0023] The first seal is arranged in the first accommodating cavity. The first skeleton is supported on the inner wall of the first accommodating cavity;

[0024] The annular scraping piece is installed in the second accommodating cavity.

[0025] As an implementable manner, a protrusion is provided between the first accommodating cavity and the second accommodating cavity. The protrusion is arranged around the valve stem and there is a gap between the protrusion and the valve stem.

[0026] As an implementable manner, a gasket is further included. The gasket is fixedly installed on the mounting sleeve, and the annular scraping piece is clamped between the protrusion and the gasket.

[0027] As an implementable manner, a heat insulation sheath is further sleeved on the valve stem. The heat insulation sheath is arranged on the mounting sleeve and on the side of the annular scraping piece away from the first seal.

[0028] As an implementable manner, a driving mechanism is installed on the valve body. The driving mechanism is connected to the valve stem and is used to drive the valve stem to perform reciprocating motion;

[0029] An air inlet and an air outlet are provided on the valve body. The air inlet is communicated with the air outlet. A valve is provided at the end of the valve stem, and the valve is located between the air inlet and the air outlet.

[0030] As an implementable manner, the valve body is subjected to hard anodic oxidation treatment.

[0031] In a second aspect, an engine is provided, including the above EGR valve.

[0032] In a third aspect, a hybrid assembly is provided, including the above engine.

[0033] In a fourth aspect, a vehicle is provided, including the above engine or hybrid assembly.

[0034] According to the technical solution provided by the embodiment of the present application, by providing a first seal on the valve stem structure and making the first seal in interference fit with the valve stem, the sealing of the valve structure is realized. The first seal is directly installed on the valve stem, and the first seal is provided with a first skeleton and a first ring. The first ring is in interference fit with the valve stem to achieve sealing, and the first skeleton supports the first ring, so that the first seal realizes skeleton-type support through its own structure, and the seal is not likely to have the risk of loosening, preventing the valve stem from bringing the corrosion products and exhaust gas of the valve body into the gap between the guide sleeve and the valve stem during the up and down reciprocating motion, avoiding valve stem jamming, and at the same time avoiding the situation that the exhaust gas enters the guide sleeve through the assembly gap and causes corrosion and jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objects and advantages of the present application will become more obvious:

[0036] Figure 1 It is a schematic structural diagram of the EGR valve in this embodiment;

[0037] Figure 2 is Figure 1 a partially enlarged view of;

[0038] Figure 3 is a schematic structural view of the EGR valve in another angle in this embodiment;

[0039] Figure 4 is Figure 3 a partially enlarged view of,

[0040] Figure 5 is a schematic structural view of the mounting sleeve.

[0041] Reference numerals:

[0042] valve body 10, second ventilation hole 11, valve stem 20,

[0043] first seal 30, first skeleton 301, first ring 302,

[0044] second seal 31, second skeleton 311, second ring 312,

[0045] mounting sleeve 33, annular scraping blade 34, gasket 35,

[0046] first ventilation hole 331, annular groove 332, protrusion 333,

[0047] first accommodation cavity 334, second accommodation cavity 335,

[0048] air inlet 40, air outlet 50, drive mechanism 60,

[0049] valve 70, guide sleeve 80, heat insulation sheath 90. Detailed implementation manners

[0050] The present application will be further described in detail below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention, rather than limiting the invention. In addition, it should be noted that for the convenience of description, only the parts related to the invention are shown in the drawings.

[0051] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0052] Please refer to Figures 1 to 4 as shown, this embodiment provides an EGR valve, including:

[0053] valve body 10,

[0054] The valve stem 20 is installed in the valve body 10 and reciprocates along the length direction of the valve stem 20.

[0055] The first seal 30 is arranged on the valve body 10.

[0056] Wherein, the first seal 30 includes a first skeleton 301 and a first ring 302. The first ring 302 is sleeved on the valve stem 20, and the first skeleton 301 is arranged on the valve body 10 and connected to the first ring 302 to support the first ring 302.

[0057] The skeleton of the seal assembly 30 supports the seal assembly 30.

[0058] In the valve structure of this embodiment, the first seal 30 is arranged on the valve stem 20 structure. The first seal 30 is in interference fit with the valve stem 20 to achieve the sealing of the valve structure. The first seal 30 is directly installed on the valve stem 20, and the first seal 30 is provided with a first skeleton 301 and a first ring 302. The first ring 302 is in interference fit with the valve stem 20 to achieve sealing. The first skeleton 301 supports the first ring 302, so that the first seal 30 realizes skeleton-type support through its own structure. The seal is not prone to the risk of loosening, preventing the corrosion products and waste gas of the valve body from being brought into the gap between the guide sleeve and the valve stem during the reciprocating movement of the valve stem up and down, avoiding valve stem jamming, and at the same time avoiding the situation that the waste gas enters the guide sleeve through the assembly gap and causes corrosion and jamming.

[0059] The valve structure provided by this embodiment does not need to be installed through structures such as springs, avoiding the risk of loosening of components such as the guide sleeve 80 and the first seal 30 caused by the failure of installation structures such as springs; at the same time, the guide sleeve 80 is arranged above the first seal 30, that is, the first seal 30 is arranged between the guide sleeve 80 and the air inlet 40, preventing the corrosion products and waste gas of the valve body 10 from being brought into the gap between the guide sleeve 80 and the valve stem 20 during the reciprocating movement of the valve stem 20 up and down, avoiding valve stem 20 jamming, and at the same time avoiding the situation that the waste gas enters the guide sleeve 80 through the assembly gap and causes corrosion and jamming.

[0060] Furthermore, it further includes: a guide sleeve 80 arranged on the valve body 10; the valve stem 20 passes through the guide sleeve 80, a valve 70 is arranged at the end of the valve stem 20, and the first seal 30 is located between the guide sleeve 80 and the valve 70.

[0061] Reference Figure 1 and Figure 3As shown, the EGR valve in this embodiment includes a valve body 10. A valve stem 20 is installed in the valve body 10. One end of the valve stem 20 is connected to a driving mechanism 60, and a valve 70 is provided at the other end. The valve stem 20 moves reciprocally along its length direction. Refer to Figure 1 and Figure 2 shown therein is that the valve stem 20 moves up and down reciprocally; one end of the valve stem 20 is an air inlet 40, and an air outlet 50 is also provided on the valve body 10. The air inlet 40 and the air outlet 50 are communicated with each other. When the valve stem 20 moves up and down reciprocally, the exhaust gas in the EGR valve is discharged through the air outlet 50. In order to ensure the service life of the EGR valve, a guide sleeve 80 and a first seal 30 are installed on the valve stem 20 in a matching manner to block the exhaust gas. The guide sleeve 80 is installed above and is sleeved on the valve stem 20 in a clearance fit manner and press-fitted into the valve body 10 with interference. The first seal 30 is arranged below the guide sleeve 80 to block the exhaust gas and prevent the exhaust gas from entering the guide sleeve 80.

[0062] The guide sleeve 80 provided in this embodiment is made of stainless steel, and a PTFE (polytetrafluoroethylene) coating is applied to the mating layer with the valve stem 20, which can realize the clearance fit installation of the guide sleeve 80 and the valve stem 20.

[0063] Furthermore, it further includes: a mounting sleeve 33 provided on the valve body 10,

[0064] a first accommodation cavity 334 surrounding the valve stem 20 is provided on the mounting sleeve 33. The first seal 30 is arranged in the first accommodation cavity 334, and the first skeleton 301 is supported on the inner wall of the first accommodation cavity 334.

[0065] Refer to Figure 2 and Figure 4 shown therein, partial enlarged views of different directions of the EGR valve are provided. Among them, the first seal 30 is installed in the first accommodation cavity 334 of the mounting sleeve 33, and sealing is achieved through the interference fit between the first seal 30 and the valve stem 20 to prevent the exhaust gas from entering between the valve stem 20 and the guide sleeve 80, affecting the use and service life of the overall EGR valve.

[0066] Furthermore, it further includes a second seal 31;

[0067] The second seal 31 is arranged in the first accommodation cavity 334. The second seal 31 includes a second skeleton 311 and a second ring 312. The second ring 312 is sleeved on the valve stem 20. The second skeleton 311 is supported on the inner wall of the first accommodation cavity 334, and the second skeleton 311 is connected to the second ring 312 to support the second ring 312;

[0068] The first seal 30 and the second seal 31 are arranged at intervals along the length direction of the valve stem 20.

[0069] In this embodiment, the structure for sealing the valve stem 20 includes two sealing rings. The first seal 30 and the second seal 31 are sequentially sleeved and installed on the valve stem 20, and are in interference fit with the valve stem 20 to block the exhaust gas, preventing the exhaust gas from entering the guide sleeve 80 through the assembly gap and causing the EGR valve to jam. At the same time, by providing the mounting sleeve 33 to accommodate the first seal 30 and the second seal 31, the structure of the mounting sleeve 33 is as Figure 5 shown, with an annular first accommodation cavity 334 for installing the first seal 30 and the second seal 31. When installing, the first seal 30 and the second seal 31 are first arranged in the mounting sleeve 33, and then the valve stem 20 is inserted upward from below into the second seal 31 and the first seal 30 to achieve a tight fit with the first seal 30 and the second seal 31. Optionally, the mounting sleeve 33 is made of stainless steel to extend the service life of the EGR valve. In this embodiment, the first seal 30 is arranged on the side close to the valve 70, and the second seal 31 is further arranged. The second seal 31 is arranged on the side of the first seal 30 away from the valve. First, the first seal 30 seals the valve stem 20. If there is a situation where some gas leaks through the first seal 30, the second seal 31 can further block the gas, and the leaked gas is discharged outside the valve body 10 through the vent hole structure described in the following embodiment, achieving the effect of discharging the gas and a good sealing effect; both the first seal 30 and the second seal 31 are supported by a skeleton type and are not prone to loosening.

[0070] In this embodiment, both the first seal 30 and the second seal 31 and the valve stem 20 adopt a lip seal form, making the fit between the seal and the valve stem 20 closer, effectively preventing corrosive substances and exhaust gas from entering the gap between the guide sleeve 80 and the valve stem 20, and preventing the EGR valve from corroding and jamming; the first seal 30 or the second seal 31 includes a connected skeleton and a ring body. The first skeleton 301 and the second skeleton 311 are the parts in contact with the mounting sleeve 33, which act as the skeleton structure of the entire seal for support. There is no need to set a cage or other structures on the sealing ring, so that the sealing effect of the sealing ring on the valve stem 20 is not affected by other cage or other structures. The sealing effect of the seal is better and it is not prone to loosening or exhaust gas entering. The first ring 302 and the second ring 312 are structures in interference fit with the valve stem 20, which are deformable structures, generally made of flexible materials, and are closely attached to the valve stem 20 to achieve the sealing effect.

[0071] Further, a first ventilation hole 331 penetrating to the outside of the mounting sleeve is formed in the inner wall of the first accommodation cavity 334, and the first ventilation hole 331 is located between the first seal 30 and the second seal 32;

[0072] A second ventilation hole 11 communicating with the outside is provided on the valve body 10, and the first ventilation hole 331 and the second ventilation hole 11 are communicated.

[0073] As Figure 4 and Figure 5 shown, in this embodiment, a plurality of first ventilation holes 331 are formed in the mounting sleeve 33. The first ventilation holes 331 are formed by penetrating the side wall of the mounting sleeve 33, that is, Figure 4 in the direction perpendicular to the valve stem 20; a second ventilation hole 11 is formed in the valve body 10, and the second ventilation hole 11 communicates with the outside. The first ventilation holes 331 and the second ventilation hole 11 are communicated to discharge the gas in the first accommodation cavity 334 to the outside of the valve body 10.

[0074] Further, an annular groove 332 is formed on the outside of the mounting sleeve 33. The annular groove 332 is circumferentially arranged around the valve stem 20, and the second ventilation hole 11 is communicated with the annular groove 332.

[0075] The number of the first ventilation holes 331 is multiple. The multiple first ventilation holes 331 are arranged at intervals in the circumferential direction around the valve stem 20. The multiple first ventilation holes 331 are respectively communicated with the annular groove 332, and the multiple first ventilation holes 331 are communicated with the second ventilation hole 11 through the annular groove 332.

[0076] Refer to Figure 4 and Figure 5 shown, an annular groove 332 is arranged on the surface of the mounting sleeve 33. The annular groove 332 is arranged around the mounting sleeve 33, and the surface of the inner wall of the valve body 10 in contact with the mounting sleeve 33 and the annular groove 332 together form an annular channel. Since each first ventilation hole 331 is communicated with the annular groove 332, that is, each first ventilation hole 331 is communicated with the annular channel formed by the annular groove 332.

[0077] Refer to Figure 4As shown, a second ventilation hole 11 is formed in the valve body 10. One end of the second ventilation hole 11 extends to the outside of the valve body 10, and the other end extends to the groove 332 on the mounting sleeve 33. That is, through the second ventilation hole 11, the first ventilation hole 331 on the mounting sleeve 33 is communicated with the outside through the annular groove 332 channel. In this embodiment, although the first seal 30 and the second seal 31 are provided for sealing, the second seal 31 is arranged at a position close to the air inlet 40 of the EGR valve, and a small amount of exhaust gas may enter the inside of the first accommodating cavity 334 through the second seal 31. Therefore, the exhaust gas inside the first accommodating cavity 334 is discharged through the above-mentioned first ventilation hole 331, the annular groove 332 channel and the second ventilation hole 11, preventing the exhaust gas from entering the guide sleeve 80 and the driving mechanism 60, and avoiding the corrosion of the guide sleeve 80 or the jamming of the driving mechanism 60.

[0078] Furthermore, at least four of the first ventilation holes 331 are provided on the mounting sleeve 33, and the four first ventilation holes 331 are arranged in a cross shape.

[0079] In this embodiment, the first ventilation hole 331 provided on the mounting sleeve 33 is a structure that penetrates the inner wall of the mounting sleeve 33 to realize the communication between the inside of the first accommodating cavity 334 and the outside. The number of the first ventilation holes 331 provided should not be too many, as too many will affect the strength of the mounting sleeve 33 and the sealing effect of the seal. Nor should the number of the first ventilation holes 331 be too few, as a small number will affect the discharge of the exhaust gas inside the first accommodating cavity 334, causing the exhaust gas to enter the guide sleeve 80 or the driving mechanism 60, resulting in the jamming of the EGR valve. In this embodiment, preferably, four first ventilation holes 331 are provided on the mounting sleeve 33 and are evenly distributed, so that the gas leaked into the first accommodating cavity 334 can flow into the first ventilation hole 331 along a shorter path and be discharged through the annular groove and the second ventilation hole, which can ensure the strength of the mounting sleeve 33 and quickly discharge the exhaust gas inside the first accommodating cavity 334.

[0080] In addition, in this embodiment, the four first ventilation holes 331 are formed in a cross shape. This setting form enables the multiple first ventilation holes 331 to be evenly distributed, discharging the exhaust gas inside the first accommodating cavity 334 from various angles. In addition, the cross-shaped first ventilation holes 331 are more convenient for punching production. Only two punching operations with staggered directions on the stainless steel component are required to drill through the mounting sleeve 33 to realize the setting of the four first ventilation hole 331 structures. The operation steps are few and simple to implement.

[0081] Further, it further includes an annular scraping blade 34. The annular scraping blade 34 is arranged on the valve body 10, the valve stem 20 passes through the annular scraping blade 34, and the annular scraping blade 34 and the first seal 30 are arranged at intervals along the length direction of the valve stem 20.

[0082] As Figure 4 shown, this embodiment further includes an annular scraping blade 34. The annular scraping blade 34 is also sleeved on the valve stem 20. Through the annular scraping blade 34, part of the corrosive substances can be blocked from entering the second seal 31, reducing the sealing pressure of the first seal 30 and the second seal 31, prolonging the service life of the seals, and also prolonging the service life of the EGR valve.

[0083] Further, a second accommodation cavity 335 surrounding the valve stem 20 is further arranged on the mounting sleeve 33. The first accommodation cavity 334 and the second accommodation cavity 335 are arranged at intervals along the length direction of the valve stem 20.

[0084] The first seal 30 is arranged in the first accommodation cavity 334, and the first skeleton 301 is supported on the inner wall of the first accommodation cavity 334.

[0085] The annular scraping blade 34 is installed in the second accommodation cavity 335.

[0086] Refer to Figure 5 shown, a second accommodation cavity 335 is arranged on the mounting sleeve 33. The second accommodation cavity 335 is arranged opposite to the first accommodation cavity 334. The mounting sleeve 33 is of an annular structure. Two grooves 332 are respectively dug at both ends of the mounting sleeve 33, which are the first accommodation cavity 334 and the second accommodation cavity 335 respectively.

[0087] Further, a protrusion 332 is arranged between the first accommodation cavity 334 and the second accommodation cavity 335. The protrusion 332 surrounds the valve stem 20 and there is a gap between the protrusion 332 and the valve stem 20.

[0088] A protrusion 333 is provided radially between the two grooves 332. The protrusion 333 serves as the boundary between the first accommodation cavity 334 and the second accommodation cavity 335, and is used to separate the second seal 31 and the annular scraping blade 34 structure. At the same time, in the valve body structure of this embodiment, there is no cage, and this sealing device cannot bear too much axial force. By providing this radially extending protrusion 333 structure, it provides support for the above-mentioned seal structure and the annular scraping blade, and at the same time separates the first accommodation cavity 334 and the second accommodation cavity 335. Among them, there is a clearance fit between the protrusion on the mounting sleeve 33 and the valve stem 20, so that after the seal is installed, the first seal 30 and the second seal 31 are used to achieve a sealed connection with the valve stem 20, and part of the corrosive substances are blocked by the scraping blade 34. The mounting sleeve 33 fixes structures such as the first seal 30, the second seal 31, and the annular scraping blade 34 for easy installation, and the mounting sleeve 33 itself does not contact the valve stem 20.

[0089] In this embodiment, the annular scraping blade 34 is sleeved on the valve stem 20 to block corrosive substances. Preferably, there is a clearance fit between the annular scraping blade 34 and the valve stem 20 to form a good spacer surface, effectively blocking the corrosive substances and not affecting the up and down movement of the valve stem 20.

[0090] Furthermore, it further includes a gasket 35. The gasket 35 is fixedly installed on the mounting sleeve 33, and the annular scraping blade 34 is clamped between the gasket 35 and the protrusion 332.

[0091] In this embodiment, the installation of the annular scraping blade 34 is achieved through the gasket 35. A gasket 35 is provided on the side of the annular scraping blade 34 away from the mounting sleeve 33, and the gasket 35 is welded to the mounting sleeve 33 to fix the scraping blade 34. The annular scraping blade 34 can be adjusted in the gap between the gasket 35 and the protrusion 332 on the mounting sleeve 33 to fit its installation with the valve stem 20.

[0092] Furthermore, a heat insulation sheath 90 is also sleeved on the valve stem 20. The heat insulation sheath 90 is provided on the mounting sleeve 33 and is provided at one end of the annular scraping blade 34 away from the first seal 30.

[0093] As Figure 2 shown, in this embodiment, a heat insulation sheath 90 is also installed on the valve stem 20. The heat insulation sheath 90 is installed at one end of the annular scraping blade 34 away from the first seal 30. The heat insulation sheath 90 prevents the high-temperature exhaust gas entering from the air inlet 40 from directly impacting the first seal 30, avoids the rapid aging and failure of the first seal 30, extends the service life of the first seal 30, and at the same time, the heat insulation sheath 90 also blocks the corrosive substances to prevent part of the corrosive substances from entering the first accommodation cavity, and avoids the situation of jamming of the guide sleeve 80 or the driving mechanism 60.

[0094] In this embodiment, it is preferably to rivet the heat insulation sheath 90 on the installation sleeve 33, so that the heat insulation sheath 90 is installed more stably, avoiding the situation that the heat insulation sheath 90 falls off due to the corrosion of the valve body 10, and the service life of the heat insulation sheath 90 is longer.

[0095] Further, a driving mechanism 60 is installed on the valve body 10, and the driving mechanism 60 is connected to the valve stem 20 for driving the valve stem 20 to perform reciprocating motion.

[0096] Reference Figure 1 and Figure 3 As shown in the figure, the top of the EGR valve provided in this embodiment is provided with a driving mechanism 60. The driving mechanism 60 is connected to the valve stem 20 to drive the valve stem 20 to perform reciprocating motion back and forth along its length direction. One end of the valve stem 20 away from the driving mechanism 60 is a valve 70. The valve 70 and the valve stem 20 perform reciprocating up and down under the drive of the driving mechanism 60. When the valve 70 performs reciprocating up and down motion, it realizes the sealing and unsealing with the air inlet 40, and discharges the waste gas under the cyclic motion.

[0097] Further, an air inlet 40 and an air outlet 50 are provided on the valve body 10. The air inlet 40 is communicated with the air outlet 50. A valve 70 is provided at the end of the valve stem. The valve 70 is located between the air inlet 40 and the air outlet 50. A seat ring is installed at the position of the air inlet 40 for the valve 70 to abut and seal with the seat ring when the EGR valve is closed.

[0098] In this embodiment, the valve body 10 is provided with an air inlet 40 and an air outlet 50, and the air inlet 40 and the air outlet 50 are communicated with each other. The air inlet 40 is an annular port. An opening structure in contact with the valve 70 is provided in the air inlet 40. A seat ring is installed at the opening. When the seat ring abuts against the valve 70, it forms a line seal; the driving mechanism 60 drives the valve stem 20 and the valve 70 to perform reciprocating up and down motion. When closed, the valve 70 abuts against the seat ring to form a sealing form to block the waste gas from entering. When opened, the valve 70 separates from the seat ring, and the discharged waste gas enters through the air inlet 40, passes through the seat ring, and is transmitted to the air outlet 50 for discharge.

[0099] Further, the valve body 10 is treated by hard anodic oxidation.

[0100] In this embodiment, the valve body 10 is treated by hard anodic oxidation. A relatively thick coating is formed on the surface of the valve body 10 by an electrochemical method to improve the surface hardness and wear resistance of the valve body 10, so as to enhance the corrosion resistance of the valve body 10, reduce the generation of corrosive substances, thereby reducing the wear of the sealing parts by the corrosive substances, prolonging the service life of the sealing parts, and further prolonging the service life of the EGR valve.

[0101] In this embodiment, the provided EGR valve arranges the sealing structure below the guide sleeve 80 and is press-fitted onto the valve body 10 by an interference fit to cooperate with the valve stem 20, which can effectively prevent exhaust gas and corrosive substances from entering the gap between the guide sleeve 80 and the valve stem 20, preventing the EGR valve from getting stuck. At the same time, through holes are provided on the sealing ring and the mounting sleeve 33 in the sealing assembly 30 and are connected to the external environment, enabling the exhaust gas leaked into the first accommodation cavity to be discharged outside the valve body 10 through the through-hole structure, preventing the leaked exhaust gas from entering the guide sleeve 80 and the driving mechanism 60 through the assembly gap, and ensuring that the EGR valve has a long service life.

[0102] This embodiment also provides an engine, including the above-mentioned EGR valve.

[0103] This embodiment adopts the above-mentioned EGR valve as a part of the engine, and it is not easy to have the situation of component loosening, which may cause the exhaust gas to enter the guide sleeve of the EGR valve through the assembly gap, resulting in corrosion and jamming.

[0104] This embodiment also provides a hybrid assembly, including the above-mentioned engine.

[0105] The hybrid assembly of this embodiment can be applied to different types of vehicles. Adopting the above-mentioned engine structure can effectively extend the service life.

[0106] This embodiment also provides a vehicle, including the above-mentioned engine or hybrid assembly.

[0107] The vehicle provided in this embodiment can be any form of vehicle, such as a new energy pure electric vehicle sedan, or an SUV, MPV, off-road vehicle suitable for new energy pure electric or hybrid models, as well as vehicles used in other special areas, etc. It should be understood that terms such as "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation of the present invention; the orientation terms "inner" and "outer" refer to the inside and outside relative to the contour of each component itself. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0108] For ease of description, spatial relative terms, such as "above", "over", "on the upper surface", "upper", etc., may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "beneath" the other devices or structures. Thus, the exemplary term "above" can include both orientations of "above" and "below". The device may also be positioned in other different ways, rotated 90 degrees or in other orientations, and the corresponding explanations are made for the spatial relative descriptions used herein.

[0109] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principle. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features having similar functions disclosed in the present application.

Claims

1. An EGR valve, characterized in that, it includes: a valve body, a valve stem, the valve stem is installed in the valve body and can reciprocate along the length direction of the valve stem, a first seal, the first seal is arranged on the valve body, wherein, the first seal includes a first skeleton and a first ring, the first ring is sleeved on the valve stem, and the first skeleton is arranged on the valve body and connected to the first ring to support the first ring.

2. The EGR valve according to claim 1, characterized in that, it further includes: a guide sleeve, the guide sleeve is arranged on the valve body; the valve stem passes through the guide sleeve, a valve is provided at the end of the valve stem, and the first seal is located between the guide sleeve and the valve.

3. The EGR valve according to claim 1, characterized in that, it further includes: a mounting sleeve arranged on the valve body, a first accommodation cavity surrounding the valve stem is provided on the mounting sleeve, the first seal is arranged in the first accommodation cavity, and the first skeleton is supported on the inner wall of the first accommodation cavity.

4. The EGR valve according to claim 3, characterized in that, it further includes a second seal; the second seal is arranged in the first accommodation cavity, the second seal includes a second skeleton and a second ring, the second ring is sleeved on the valve stem, the second skeleton is supported on the inner wall of the first accommodation cavity, and the second skeleton is connected to the second ring to support the second ring; the first seal and the second seal are arranged at intervals along the length direction of the valve stem.

5. The EGR valve according to claim 4, characterized in that, a first ventilation hole penetrating to the outside of the mounting sleeve is formed on the inner wall of the first accommodation cavity, and the first ventilation hole is located between the first seal and the second seal; a second ventilation hole communicating with the outside is provided on the valve body, and the first ventilation hole and the second ventilation hole are communicated.

6. The EGR valve according to claim 5, characterized in that, an annular groove is formed on the outside of the mounting sleeve, the annular groove is arranged circumferentially around the valve stem, and the second ventilation hole is communicated with the annular groove; the number of the first ventilation holes is multiple, the multiple first ventilation holes are arranged at intervals circumferentially around the valve stem, the multiple first ventilation holes are respectively communicated into the annular groove, and the multiple first ventilation holes are communicated with the second ventilation hole through the annular groove.

7. The EGR valve according to claim 3, characterized in that, it further includes: an annular scraping piece, the annular scraping piece is arranged on the valve body, the valve stem passes through the annular scraping piece, and the annular scraping piece is arranged at intervals with the first seal along the length direction of the valve stem.

8. The EGR valve according to claim 7, characterized in that, a second accommodation cavity surrounding the valve stem is further provided on the mounting sleeve, and the first accommodation cavity and the second accommodation cavity are arranged at intervals along the length direction of the valve stem; the first seal is arranged in the first accommodation cavity, and the first skeleton is supported on the inner wall of the first accommodation cavity; the annular scraping piece is installed in the second accommodation cavity.

9. The EGR valve according to claim 8, characterized in that, a protrusion is provided between the first accommodating cavity and the second accommodating cavity, the protrusion is arranged around the valve stem, and there is a gap between the protrusion and the valve stem.

10. The EGR valve according to claim 9, characterized in that, it further includes a gasket, the gasket is fixedly installed on the mounting sleeve, and the annular scraping blade is clamped between the protrusion and the gasket.

11. The EGR valve according to claim 8, characterized in that, a heat insulation sheath is further sleeved on the valve stem, the heat insulation sheath is arranged on the mounting sleeve and on the side of the annular scraping blade away from the first seal.

12. The EGR valve according to claim 1, characterized in that, a driving mechanism is installed on the valve body, the driving mechanism is connected to the valve stem and is used to drive the valve stem to perform reciprocating motion; an air inlet and an air outlet are provided on the valve body, the air inlet is communicated with the air outlet, a valve is provided at the end of the valve stem, and the valve is located between the air inlet and the air outlet.

13. The EGR valve according to claim 1, characterized in that, the valve body is subjected to hard anodic oxidation treatment.

14. An engine, characterized in that, it includes the EGR valve according to any one of claims 1-13.

15. A hybrid assembly, characterized in that, it includes the engine according to claim 14.

16. A vehicle, characterized in that, it includes the engine according to claim 14 or the hybrid assembly according to claim 15.

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