Dual-fuel engine and vehicle

Abstract

The invention discloses a dual-fuel engine and a vehicle, and belongs to the technical field of engines. A dual-fuel engine includes: a cylinder head; the dual-fuel injector is arranged on the inner side of the cylinder cover; the dual-fuel rail is arranged on the outer side of the cylinder cover and mounted on the cylinder cover, and a first oil supply channel and a second oil supply channel are formed in the dual-fuel rail; the two-way transmission pipe is installed on the cylinder cover and is provided with a first transfer channel, a second transfer channel, an oil drainage transfer channel and a flow collecting groove, the first transfer channel communicates with the first oil supply channel and the dual-fuel injector, the second transfer channel communicates with the second oil supply channel and the dual-fuel injector, and the flow collecting groove communicates with the oil drainage transfer channel. A flow collecting cavity is defined by the inner wall of the flow collecting groove and the dual-fuel injector, one end of the oil drainage transfer channel communicates with the flow collecting groove, and the other end of the oil drainage transfer channel is located outside the cylinder cover.

Description

Technical Field

[0001] The present application belongs to the technical field of engines, and in particular, relates to a dual-fuel engine and a vehicle. Background Art

[0002] The dual-fuel engine high-pressure direct injection technology, also known as HPDI technology, is a technology that uses one injector to complete the injection of two fuels. Many companies are currently using this technology.

[0003] The two fuel supply systems pose great challenges to installation and layout, involving pipeline directions, sealing, structure, etc., which affect vehicle matching, manufacturing process, and maintenance convenience.

[0004] In the related art, the cover of the dual-fuel engine is inconvenient to disassemble and assemble, and both fuel supply pipes need to be removed during disassembly and assembly. Summary of the invention

[0005] The present application aims to solve the technical problem of inconvenient assembly and disassembly of a cover of a dual-fuel engine to a certain extent at least. To this end, the present application provides a dual-fuel engine and a vehicle.

[0006] In a first aspect, an embodiment of the present application provides a dual-fuel engine, comprising:

[0007] Cylinder head;

[0008] a dual fuel injector disposed inside the cylinder head;

[0009] A dual fuel rail, disposed outside the cylinder head and mounted on the cylinder head, having a first fuel supply passage and a second fuel supply passage;

[0010] A two-way transmission pipe is installed on the cylinder head and is provided with a first transfer channel, a second transfer channel, an oil leakage transfer channel and a collecting groove. The first transfer channel is connected to the first oil supply channel and the dual-fuel injector, the second transfer channel is connected to the second oil supply channel and the dual-fuel injector, the inner wall of the collecting groove and the dual-fuel injector together form a collecting cavity, one end of the oil leakage transfer channel is connected to the collecting groove, and the other end is located outside the cylinder head.

[0011] In some embodiments, the dual fuel rail is further provided with a mounting hole, and the outlets of the first fuel supply channel and the second fuel supply channel are both provided on the inner wall of the mounting hole; one end of the two-way transmission pipe located outside the cylinder head is located in the mounting hole and is tightly connected to the inner wall of the mounting hole, and the inlet of the first transfer channel is aligned with the outlet of the first fuel supply channel, and the inlet of the second transfer channel is aligned with the outlet of the second fuel supply channel.

[0012] In some embodiments, the mounting hole is a through hole, and the two-way transmission pipe can pass through the mounting hole. The dual-fuel engine also includes a pressure plate mechanism, which is installed on the cylinder head or the dual fuel rail and abuts against one end of the two-way transmission pipe away from the dual fuel injector.

[0013] In some embodiments, the pressure plate mechanism includes a pressure plate and a first connecting member, wherein the first connecting member is connected to the pressure plate and the dual fuel rail, and the pressure plate abuts against the dual-pass transmission pipe.

[0014] In some embodiments, one end of the two-way transmission pipe away from the dual fuel injector is flush with the dual fuel rail, and one end of the two-way transmission pipe away from the dual fuel injector is provided with a pull-out fitting hole; the dual fuel engine also includes a second connecting member, which is connected to the dual fuel rail and the cylinder head.

[0015] In some embodiments, the dual-fuel injector includes an injector body and a connecting sleeve fixedly connected to the injector body, the injector body having a first injection inlet and a second injection inlet located on the inner side of the connecting sleeve, the two-way transmission pipe is located in the connecting sleeve, the outlet of the first transfer channel is connected to the first injection inlet, and the outlet of the second transfer channel is connected to the second injection inlet; the dual-fuel engine also includes a first sealing gasket and a first sealing ring, the first sealing gasket is arranged between the two-way transmission pipe and the injector body, the two-way transmission pipe abuts against the first sealing gasket, the first sealing ring is sleeved on the two-way transmission pipe and is located between the two-way transmission pipe and the connecting sleeve, and the collecting groove is arranged between the first sealing ring and the first sealing gasket.

[0016] In some embodiments, the first oil supply channel and the second oil supply channel are spaced apart along the height direction of the dual-fuel engine, and the first transit channel and the second transit channel are also spaced apart along the height direction of the dual-fuel engine, and the mounting hole is disposed between the first oil supply channel and the second oil supply channel.

[0017] In some embodiments, a side wall of the cylinder head is provided with an avoidance hole, and the two-way transmission pipe extends into the cylinder head through the avoidance hole; the dual fuel rail is fixedly installed on the cylinder head, and the dual fuel engine also includes a second sealing ring and a second sealing gasket, the second sealing ring is sleeved on the outside of the two-way transmission pipe and is located between the two-way transmission pipe and the inner wall of the avoidance hole, the second sealing gasket is sleeved on the outside of the two-way transmission pipe and is located between the two-way transmission pipe and the cylinder head, and the dual fuel rail abuts against the second sealing gasket.

[0018] In some embodiments, the dual fuel rail is further provided with an oil drain channel, the inlet of which is connected to the outlet of the oil drain transfer channel, and the dual fuel engine further comprises a collecting tank, the inlet of which is connected to the outlet of the oil drain channel.

[0019] In a second aspect, an embodiment of the present application provides a vehicle comprising the dual-fuel engine described in the first aspect.

[0020] The present invention has at least the following beneficial effects:

[0021] The dual fuel rail and dual-pass transmission pipe of the dual fuel engine are installed on the cylinder head, not on the cover. When removing the cover, it is not necessary to remove the dual fuel rail and the dual-pass transmission pipe, which facilitates the removal of the cover, and thus facilitates the inspection of various components inside the engine. The dual fuel engine integrates the first fuel supply channel and the second fuel supply channel for transporting two fuels respectively on the dual fuel rail, and integrates the first transfer channel and the second transfer channel for transporting two fuels respectively on the dual-pass transmission pipe. The dual fuel engine has a high degree of integration. Such a design can reduce the layout of the pipeline, help reduce the external dimensions of the dual fuel engine, and make the dual fuel engine suitable for different vehicle models. By opening a manifold and an oil leakage transfer channel in the dual-pass transmission pipe, when the dual-pass transmission pipe and the dual fuel injector are not tightly sealed, the leaked fuel can be gathered in the manifold and discharged to the outside of the dual fuel engine along the oil leakage transfer channel, preventing the fuel from leaking and injecting into the dual fuel engine, causing damage to the dual fuel engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A front view of a dual fuel engine in some embodiments of the present application is shown.

[0024] Figure 2 Shown along Figure 1 Cross-sectional view along the AA direction.

[0025] Figure 3 Shows Figure 2 Enlarged view of point B in the middle.

[0026] Figure 4 A front view of a pressure plate of a dual fuel engine in some embodiments of the present application is shown.

[0027] Figure 5A front view of a dual-pass transfer pipe of a dual-fuel engine in some embodiments of the present application is shown.

[0028] Figure 6 A top view of a dual-pass transfer pipe of a dual-fuel engine in some embodiments of the present application is shown.

[0029] Figure 7 A front view of a dual-fuel engine in some other embodiments of the present application is shown.

[0030] Figure 8 Shown along Figure 7 Cross-sectional view along CC direction.

[0031] Fig. 9 Shows Figure 8 Enlarged view of point D in the middle.

[0032] Reference numerals: 100 - dual-fuel engine, 110 - cylinder head, 110a - avoidance hole, 120 - dual-fuel injector, 121 - injector body, 122 - connecting sleeve, 121a - first injection inlet, 121b - second injection inlet, 130 - dual fuel rail, 130a - first oil supply channel, 130b - second oil supply channel, 130c - mounting hole, 130d - oil drain channel, 140 - dual-pass transmission pipe, 140a - first transfer channel, 140b - second oil supply channel, 140c - mounting hole, 140d - oil drain channel, 140d ...30c - mounting hole, 130d - oil drain channel, 140d - dual-pass transmission pipe, 130a - first transfer channel, 130b - second oil supply channel, 130c - mounting hole, 130d - oil drain channel, 140d - dual-pass transmission pipe, 1 0b-the second transfer channel, 140c-the oil leakage transfer channel, 140d-the collecting groove, 140e-the pull-out fitting hole, 150-the pressure plate mechanism, 151-the pressure plate, 151a-the oil leakage port, 151b-the connecting part avoidance hole, 152-the first connecting part, 160-the cylinder head, 165-the first sealing gasket, 170-the first sealing ring, 175-the second sealing ring, 180-the second sealing gasket, 185-the third sealing ring, 190-the cover, 195-the second connecting part. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] In the related art, the cover of the dual-fuel engine has the technical problem of being inconvenient to disassemble and assemble. The embodiment of the present application provides a dual-fuel engine and a vehicle, which can at least solve the technical problem of the inconvenient to disassemble and assemble the cover of the dual-fuel engine to a certain extent.

[0038] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0039] like Figure 1 , Figure 2 and Figure 3 As shown, the dual fuel engine 100 includes a cylinder head 110 , dual fuel injectors 120 , a dual fuel rail 130 , and a dual-pass transfer pipe 140 . The dual fuel injector 120 is arranged on the inner side of the cylinder head 110; the dual fuel rail 130 is arranged on the outer side of the cylinder head 110 and installed on the cylinder head 110, and is provided with a first oil supply channel 130a and a second oil supply channel 130b; the two-way transmission pipe 140 is installed on the cylinder head 110, and is provided with a first transfer channel 140a, a second transfer channel 140b, an oil leakage transfer channel 140c and a collecting groove 140d. The first transfer channel 140a is connected to the first oil supply channel 130a and the dual fuel injector 120, the second transfer channel 140b is connected to the second oil supply channel 130b and the dual fuel injector 120, the inner wall of the collecting groove 140d and the dual fuel injector 120 are combined to form a collecting cavity, one end of the oil leakage transfer channel 140c is connected to the collecting groove 140d, and the other end is located outside the cylinder head 110.

[0040] The cover 190 is installed above the cylinder head 110 and is detachably connected to the cylinder head 110. The structures of the cover 190 and the cylinder head 110 are various and are known to those skilled in the art, and are not limited in this application. The dual-fuel injector 120 has a first injection inlet 121a and a second injection inlet 121b, and the first injection inlet 121a and the second injection inlet 121b respectively enter different fuels. The dual-fuel injector 120 can inject two fuels simultaneously or separately, which can achieve more accurate fuel mixing and a more optimized combustion process. The structure of the dual-fuel injector 120 is also known to those skilled in the art and is not limited here.

[0041] The dual fuel rail 130 is located outside the cylinder head 110 and is installed on the cylinder head 110. The inlet of the first fuel supply channel 130a of the dual fuel rail 130 is connected to the first fuel, and the inlet of the second fuel supply channel 130b is connected to the second fuel. The first fuel and the second fuel can be fuel oil, natural gas, etc. The dual-pass transmission pipe 140 connects the dual fuel rail 130 and the dual fuel injector 120. It is easy to understand that the outlet of the first fuel supply channel 130a is connected to the inlet of the first transfer channel 140a to achieve the communication between the first fuel supply channel 130a and the first transfer channel 140a; the outlet of the second fuel supply channel 130b is connected to the inlet of the second transfer channel 140b to achieve the communication between the second fuel supply channel 130b and the second transfer channel 140b. It is easy to understand that the outlet of the first transfer channel 140a is communicated with the first injection inlet 121a of the dual-fuel injector 120 to achieve communication between the first transfer channel 140a and the dual-fuel injector 120; the outlet of the second transfer channel 140b is communicated with the second injection inlet 121b of the dual-fuel injector 120 to achieve communication between the second transfer channel 140b and the dual-fuel injector 120. The dual-fuel injector 120 and the dual-pass transmission pipe 140 can be communicated through a high-pressure oil pipe.

[0042] It should be noted that it can be combined with Figure 3 and Figure 6 As shown, the manifold 140d is provided on the outer surface of the two-way transmission pipe 140 and at one end of the two-way transmission pipe 140 connected to the dual-fuel injector 120. The inner wall of the manifold 140d and the dual-fuel injector 120 together form a manifold cavity. When the two-way transmission pipe 140 and the dual-fuel injector 120 are not tightly sealed and the fuel leaks through the gap between the two-way transmission pipe 140 and the dual-fuel injector 120, the fuel will flow into the manifold cavity and be discharged along the oil leakage transfer channel 140c.

[0043] The dual fuel rail 130 and the dual-pass transmission pipe 140 of the dual fuel engine 100 are both installed on the cylinder head 110, not on the cover 190. When the cover 190 is removed, the dual fuel rail 130 and the dual-pass transmission pipe 140 do not need to be removed, which facilitates the removal of the cover 190, and further facilitates the inspection of various components inside the engine. The dual fuel engine 100 integrates the first fuel supply channel 130a and the second fuel supply channel 130b for transporting two kinds of fuels respectively on the dual fuel rail 130, and integrates the first transfer channel 140a and the second transfer channel 140b for transporting two kinds of fuels respectively on the dual-pass transmission pipe 140. The dual fuel engine 100 has a high degree of integration. Such a design can reduce the layout of the pipelines, help reduce the external dimensions of the dual fuel engine 100, and make the dual fuel engine 100 suitable for different vehicle models. By opening a collecting groove 140d and an oil leakage transfer channel 140c in the two-way transmission pipe 140, when the two-way transmission pipe 140 and the dual-fuel injector 120 are not tightly sealed, the leaked fuel can be gathered in the collecting groove 140d and discharged to the outside of the dual-fuel engine 100 along the oil leakage transfer channel 140c, thereby preventing the fuel from being injected into the dual-fuel engine 100 after leakage, causing damage to the dual-fuel engine 100.

[0044] It is easy to understand that the side wall of the cylinder head 110 is provided with an avoidance hole 110 a , and the two-way transmission pipe 140 extends into the cylinder head 110 through the avoidance hole 110 a to be connected with the dual fuel injector 120 in the cylinder head 110 .

[0045] like Figure 3 As shown, in some embodiments, a side wall of the cylinder head 110 is provided with an avoidance hole 110a, and the two-way transmission pipe 140 extends into the cylinder head 110 through the avoidance hole 110a; the dual-fuel engine 100 also includes a second sealing ring 175, which is sleeved on the outside of the two-way transmission pipe 140 and located between the two-way transmission pipe 140 and the inner wall of the avoidance hole 110a, sealing the gap between the two-way transmission pipe 140 and the inner wall of the avoidance hole 110a, and preventing fuel from leaking from the gap between the two-way transmission pipe 140 and the inner wall of the avoidance hole 110a.

[0046] In some embodiments, the dual fuel rail 130 is further provided with a mounting hole 130c, and the outlets of the first fuel supply channel 130a and the second fuel supply channel 130b are both provided on the inner wall of the mounting hole 130c; one end of the two-way transmission pipe 140 located outside the cylinder head 110 is located in the mounting hole 130c, and is tightly connected to the inner wall of the mounting hole 130c, and the inlet of the first transfer channel 140a is aligned with the outlet of the first fuel supply channel 130a, and the inlet of the second transfer channel 140b is aligned with the outlet of the second fuel supply channel 130b.

[0047] Specifically, a mounting hole 130 c is formed on the dual fuel rail 130 , and an inner wall of the mounting hole 130 c is formed with outlets of the first fuel supply passage 130 a and the second fuel supply passage 130 b . One end of the two-way transmission tube 140 communicating with the dual fuel rail 130 is located in the mounting hole 130c, that is, the end of the two-way transmission tube 140 located outside the cylinder head 110 is located in the mounting hole 130c, that is, the end of the two-way transmission tube 140 having the entrances of the first transfer channel 140a and the second transfer channel 140b is located in the mounting hole 130c. After the two-way transmission tube 140 is located in the mounting hole 130c, the entrance of the first transfer channel 140a of the two-way transmission tube 140 is aligned with the outlet of the first oil supply channel 130a, so that the fuel in the first oil supply channel 130a flows into the first transfer channel 140a; the entrance of the second transfer channel 140b of the two-way transmission tube 140 is aligned with the outlet of the second oil supply channel 130b, so that the fuel in the second oil supply channel 130b flows into the second transfer channel 140b. In these embodiments, the dual fuel rail 130 and the dual-pass transmission pipe 140 are directly connected, and there is no need to set up connecting components such as high-pressure oil pipes, which simplifies the structure of the dual fuel engine 100 and improves the integration of the dual fuel engine 100. It should be noted that the dual-pass transmission pipe 140 and the dual fuel rail 130 are sealed to prevent fuel from leaking through the gap between the dual-pass transmission pipe 140 and the dual fuel rail 130.

[0048] In some embodiments, the dual-fuel engine 100 further includes a third sealing ring 185, which is sleeved on the two-way transmission pipe 140 and located between the two-way transmission pipe 140 and the inner wall of the mounting hole 130c, and the two-way transmission pipe 140 and the inner wall of the mounting hole 130c clamp the third sealing ring 185, and the third sealing ring 185 seals the gap between the two-way transmission pipe 140 and the dual fuel rail 130, so that the two-way transmission pipe 140 and the dual fuel rail 130 are sealed and connected.

[0049] In some embodiments, a plurality of third sealing rings 185 are provided. Along the length direction of the two-way transmission tube 140, there is at least one third sealing ring 185 on both sides of the entrance of the first transfer channel 140a, and there is at least one third sealing ring 185 on both sides of the entrance of the second transfer channel 140b. Figure 3 As shown, there is at least one third sealing ring 185 on the left and right sides of the entrance of the first transfer channel 140a, and there is at least one third sealing ring 185 on the left and right sides of the entrance of the second transfer channel 140b.

[0050] In some embodiments, along the length direction of the two-way transmission tube 140, the inlet of the first transfer channel 140a and the inlet of the second transfer channel 140b are arranged at intervals, such as Figure 3As shown, three third sealing rings 185 are provided, wherein one of the third sealing rings 185 is arranged on a side of the entrance of the first transfer channel 140a away from the entrance of the second transfer channel 140b, that is, it is arranged on the left side of the entrance of the first transfer channel 140a; one of the third sealing rings 185 is arranged between the entrance of the first transfer channel 140a and the entrance of the second transfer channel 140b, and one of the third sealing rings 185 is arranged on a side of the entrance of the second transfer channel 140b away from the entrance of the first transfer channel 140a, that is, it is arranged on the right side of the entrance of the second transfer channel 140b.

[0051] In some embodiments, the mounting hole 130c is a through hole, and the dual-pass transmission pipe 140 can pass through the through hole. The dual-fuel engine 100 also includes a pressure plate mechanism 150, which is installed on the cylinder head 110 or the dual fuel rail 130 and abuts against one end of the dual-pass transmission pipe 140 away from the dual fuel injector 120.

[0052] That is, the size of the two-way transmission pipe 140 is smaller than the size of the mounting hole 130c, and one end of the two-way transmission pipe 140 connected to the dual fuel injector 120 can be inserted from the mounting hole 130c. The pressing plate mechanism 150 is fixedly connected to the cylinder head 110 or the dual fuel rail 130. After the pressing plate mechanism 150 is fixedly connected to the cylinder head 110 or the dual fuel rail 130, the pressing plate mechanism 150 presses one end of the two-way transmission pipe 140 away from the dual fuel injector 120, so that the two-way transmission pipe 140 is pressed against the dual fuel injector 120, so that the two-way transmission pipe 140 and the dual fuel injector 120 are connected. With this design, the two-way transmission pipe 140 can be aligned and communicated with the dual fuel injector 120 by inserting into the mounting hole 130c, and aligned and communicated with the dual fuel rail 130. After the two-way transmission pipe 140 is inserted into place, it is pressed by the pressing plate mechanism 150 to fix the two-way transmission pipe 140 and prevent the two-way transmission pipe 140 from loosening. This design facilitates the installation of the dual-pass transmission pipe 140 and the disassembly of the dual-pass transmission pipe 140 . The dual-pass transmission pipe 140 can be removed from the dual-fuel engine 100 without disassembling the dual fuel rail 130 , which facilitates the maintenance of the dual-pass transmission pipe 140 .

[0053] In some embodiments, the pressure plate mechanism 150 includes a pressure plate 151 and a first connecting member 152 . The first connecting member 152 is connected to the pressure plate 151 and the dual fuel rail 130 . The pressure plate 151 abuts against the dual-pass transmission pipe 140 .

[0054] The pressing plate mechanism 150 presses the two-way transmission pipe 140 through the pressing plate 151, and the first connecting member 152 can be a bolt, a screw, etc. Figure 4As shown, a connection member avoidance hole 151b for avoiding the first connection member 152 is opened on the pressure plate 151. The first connection member 152 passes through the avoidance hole 110a and is threadedly connected with the dual fuel rail 130. During the threaded connection process, the first connection member 152 gradually presses the pressure plate 151, thereby driving the pressure plate 151 to press the dual-way transmission pipe 140, so that the dual-way transmission pipe 140 is pressed against the dual fuel injector 120.

[0055] In some embodiments, the first connecting member 152 is a bolt, and the pressure plate mechanism 150 includes two bolts, which are spaced apart along the length direction of the dual fuel rail 130 .

[0056] Please combine Figure 1 , Figure 4 and Figure 5 As shown, in some embodiments, an oil leakage port 151a is opened on the pressure plate 151, and the outlet of the oil leakage transfer channel 140c is located in the oil leakage port 151a, so that the fuel leaked from the gap between the two-way transmission pipe 140 and the dual-fuel injector 120 can leak out from the oil leakage port 151a.

[0057] like Figure 2 and Figure 3 As shown, in some embodiments, one end of the two-way transmission pipe 140 away from the dual fuel injector 120 is flush with the dual fuel rail 130, and a pull-out fitting hole 140e is provided at one end of the two-way transmission pipe 140 away from the dual fuel injector 120; the dual fuel engine 100 also includes a second connecting member 195, which is connected to the dual fuel rail 130 and the cylinder head 110.

[0058] The extraction matching hole 140e may be a threaded hole, which is mainly used to cooperate with a disassembly tool, so that the disassembly tool can apply a force to the dual-pass transmission tube 140, so that the dual-pass transmission tube 140 can be pulled out from the dual fuel rail 130, the cylinder head 110 and the dual fuel injector 120. In some embodiments, the extraction matching hole 140e is a threaded hole, and one end of the disassembly tool has an adapted external thread. After the disassembly tool is threadedly engaged with the threaded hole, a pulling force is applied to the disassembly tool in a direction away from the dual fuel injector 120, so that the dual-pass transmission tube 140 can be pulled out. The second connecting member 195 may be a bolt, a screw, etc., and the second connecting member 195 passes through the dual fuel rail 130 and is threadedly connected to the cylinder head 110, pressing the dual fuel rail 130, so that the dual fuel rail 130 is fixed on the cylinder head 110. The second connecting member 195 connects the dual fuel rail 130 and the cylinder head 110, which can facilitate the disassembly and assembly of the dual fuel rail 130.

[0059] In some embodiments, the dual fuel rail 130 is attached to the cylinder head 110, such as Figure 2As shown, the right end surface of the dual fuel rail 130 is in contact with the left end surface of the cylinder head 110. This design helps to reduce the volume of the dual fuel engine 100 and improve the integration of the dual fuel engine 100.

[0060] In some embodiments, the dual-fuel injector 120 includes an injector body 121 and a connecting sleeve 122 fixedly connected to the injector body 121, the injector body 121 has a first injection inlet 121a and a second injection inlet 121b located inside the connecting sleeve 122, the two-way transmission pipe 140 is located in the connecting sleeve 122 and is sealed to the connecting sleeve 122, the outlet of the first transfer channel 140a is connected to the first injection inlet 121a, and the outlet of the second transfer channel 140b is connected to the first injection inlet 121a. Connected to the second injection inlet 121b; the dual-fuel engine 100 also includes a first sealing gasket 165 and a first sealing ring 170, the first sealing gasket 165 is arranged between the two-way transmission pipe 140 and the injector body 121, the two-way transmission pipe 140 abuts against the first sealing gasket 165, the first sealing ring 170 is sleeved on the two-way transmission pipe 140, and is located between the two-way transmission pipe 140 and the connecting sleeve 122, and the collecting groove 140d is arranged between the first sealing ring 170 and the first sealing gasket 165.

[0061] The injector body 121 has a function of injecting fuel. The connecting sleeve 122 is used to connect with the two-way transmission pipe 140. Specifically, the injector body 121 has a first injection inlet 121a and a second injection inlet 121b, both of which are arranged inside the connecting sleeve 122, and one end of the two-way transmission pipe 140 away from the dual fuel rail 130 is located in the connecting sleeve 122, and the outlet of the first transfer channel 140a, the outlet of the second transfer channel 140b and the manifold 140d are all arranged at one end of the two-way transmission pipe 140 away from the dual fuel rail 130. The outlet of the first transfer channel 140a is connected to the first injection inlet 121a to deliver the fuel in the first transfer channel 140a into the injector body 121, and the outlet of the second transfer channel 140b is connected to the second injection inlet 121b to deliver the fuel in the second transfer channel 140b into the injector body 121.

[0062] These embodiments realize the sealed connection between the connecting sleeve 122 and the two-way transmission tube 140 through the first sealing gasket 165 and the first sealing ring 170, and realize the sealed connection between the injector body 121 and the two-way transmission tube 140. Specifically, the first sealing gasket 165 is arranged between the two-way transmission tube 140 and the injector body 121. Under the action of the pressure plate mechanism 150, the two-way transmission tube 140 presses against the first sealing gasket 165, and the first sealing gasket 165 deforms to fill the gap between the two-way transmission tube 140 and the injector body 121, thereby making the two-way transmission tube 140 and the injector body 121 sealed and connected. Specifically, the first sealing ring 170 is arranged between the two-way transmission tube 140 and the connecting sleeve 122, and the two-way transmission tube 140 and the connecting sleeve 122 clamp the first sealing ring 170, and the first sealing ring 170 fills the gap between the two-way transmission tube 140 and the connecting sleeve 122, so that the two-way transmission tube 140 and the connecting sleeve 122 are sealed and connected. With this design, two seals are formed between the dual-pass transmission pipe 140 and the dual-fuel injector 120 , thereby ensuring the sealing effect between the dual-pass transmission pipe 140 and the dual-fuel injector 120 , and the fuel is not easy to leak through the gap between the dual-pass transmission pipe 140 and the dual-fuel injector 120 .

[0063] In these embodiments, the manifold 140d is disposed between the first sealing ring 170 and the first sealing gasket 165. When the first sealing gasket 165 is not tightly sealed, the fuel will leak into the manifold 140d and leak out through the oil leakage transfer channel 140c, thereby preventing the fuel from being injected into the dual-fuel engine 100 after leakage, thereby damaging the dual-fuel engine 100. It should be noted that the inner wall of the manifold 140d and the connecting sleeve 122 together form a manifold cavity.

[0064] In some embodiments, the first sealing gasket 165 is a copper gasket.

[0065] In some embodiments, the first oil supply channel 130a and the second oil supply channel 130b are spaced apart along the height direction of the dual-fuel engine 100, and the first transit channel 140a and the second transit channel 140b are also spaced apart along the height direction of the dual-fuel engine 100, and the mounting hole 130c is disposed between the first oil supply channel 130a and the second oil supply channel 130b.

[0066] like Figure 2As shown, the first oil supply passage 130a and the second oil supply passage 130b are located at the top and the other is located at the bottom. The first oil supply passage 130a and the second oil supply passage 130b are arranged at intervals in the height direction of the dual-fuel engine 100, so that the first oil supply passage 130a and the second oil supply passage 130b have a spacing in the height direction of the dual-fuel engine 100, so as to facilitate avoiding the first connecting member 152 and the second connecting member 195, so that the first connecting member 152 can be connected between the first oil supply passage 130a and the second oil supply passage 130b of the dual fuel rail 130, so that the second connecting member 195 can pass through the area between the first oil supply passage 130a and the second oil supply passage 130b of the dual fuel rail 130 and connect to the cylinder head 110, which can facilitate the arrangement of the first connecting member 152 and the second connecting member 195. After such a design, the mounting hole 130c can be opened between the first oil supply channel 130a and the second oil supply channel 130b, so that the two-way transmission pipe 140 is located between the first oil supply channel 130a and the second oil supply channel 130b, which can facilitate the two-way transmission pipe 140 to communicate with the dual fuel rail 130. The first transfer channel 140a and the second transfer channel 140b are arranged at intervals along the height direction of the dual fuel engine 100, which helps to reduce the width of the two-way transmission pipe 140, so that the two-way transmission pipe 140 can be installed in a relatively narrow space.

[0067] In some embodiments, the first oil supply channel 130a, the first transfer channel 140a, the second transfer channel 140b, and the second oil supply channel 130b are sequentially arranged downwardly along the height direction of the dual-fuel engine 100. With such a design, the first oil supply channel 130a is close to the first transfer channel 140a, which facilitates the communication between the first oil supply channel 130a and the first transfer channel 140a; the second transfer channel 140b is close to the second oil supply channel 130b, which facilitates the communication between the second transfer channel 140b and the second oil supply channel 130b.

[0068] like Figure 7 , Figure 8 and Fig. 9 As shown, in some embodiments, a side wall of the cylinder head 110 is provided with an avoidance hole 110a, and the two-way transmission pipe 140 extends into the cylinder head 110 through the avoidance hole 110a; the dual fuel rail 130 is fixedly installed on the cylinder head 110, and the dual fuel engine 100 further includes a second sealing ring 175 and a second sealing gasket 180, the second sealing ring 175 is sleeved on the outside of the two-way transmission pipe 140 and is located between the two-way transmission pipe 140 and the inner wall of the avoidance hole 110a, the second sealing gasket 180 is sleeved on the outside of the two-way transmission pipe 140 and is located between the two-way transmission pipe 140 and the cylinder head 110, and the dual fuel rail 130 abuts against the second sealing gasket 180.

[0069] The second sealing ring 175 is arranged between the two-way transmission pipe 140 and the inner wall of the avoidance hole 110a. The two-way transmission pipe 140 and the inner wall of the avoidance hole 110a clamp the second sealing ring 175. The second sealing ring 175 fills the gap between the two-way transmission pipe 140 and the inner wall of the avoidance hole 110a, so that the two-way transmission pipe 140 and the inner wall of the avoidance hole 110a are sealed and connected to prevent the fuel inside the cylinder head 110 from leaking through the gap between the two-way transmission pipe 140 and the avoidance hole 110a. The second sealing gasket 180 is sleeved outside the two-way transmission pipe 140. After the dual fuel rail 130 and the cylinder head 110 are connected, the dual fuel rail 130 presses against the second sealing gasket 180, and the second sealing gasket 180 seals the gap between the dual fuel rail 130 and the cylinder head 110. With this design, when the second sealing ring 175 fails to seal, the second sealing gasket 180 can seal the gap between the dual fuel rail 130 and the cylinder head 110 to prevent the fuel inside the cylinder head 110 from leaking through the gap between the dual-pass transmission pipe 140 and the avoidance hole 110a, thereby improving the safety performance of the dual-fuel engine 100.

[0070] like Fig. 9 As shown, in some embodiments, the dual fuel rail 130 is further provided with an oil drain channel 130d, the inlet of the oil drain channel 130d is connected to the outlet of the oil drain transfer channel 140c, and the dual fuel engine 100 further includes a collecting tank (not shown in the figure), the inlet of the collecting tank is connected to the outlet of the oil drain channel.

[0071] These embodiments further provide an oil drain channel 130d on the dual fuel rail 130, and connect the inlet of the oil drain channel 130d and the outlet of the oil drain transfer channel 140c, so that the fuel leaked from each dual-pass transmission pipe 140 is gathered in the oil drain channel 130d and gathered in the collection tank along the oil drain channel 130d, thereby preventing the fuel from being directly discharged to the outside of the engine. The temperature of the engine is relatively high, and there is a risk of the fuel being ignited by the high temperature if it is directly discharged to the outside of the engine. Moreover, the direct discharge of the fuel to the outside of the engine may pollute the engine and other components on the vehicle body. The provision of the oil drain channel 130d and the collection tank improves the safety performance of the dual-fuel engine 100 on the one hand, and prevents the fuel from polluting the engine and other components on the vehicle body on the other hand.

[0072] The dual-fuel engine 100 generally includes a plurality of dual-pass delivery pipes 140 and a plurality of dual-fuel injectors 120 to supply fuel to different cylinders respectively, and a dual fuel rail 130 may be provided, and one dual fuel rail 130 simultaneously supplies fuel to a plurality of dual-pass delivery pipes 140. The number of dual fuel rails 130, dual-pass delivery pipes 140 and dual fuel injectors 120 is not limited in the present application.

[0073] Based on the same inventive concept, the embodiment of the present application further provides a vehicle, comprising the above-mentioned dual-fuel engine 100. Since the vehicle comprises the above-mentioned dual-fuel engine 100, it naturally has all the beneficial effects of the dual-fuel engine 100, which will not be elaborated here.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0075] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0076] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A dual fuel engine, characterized in that: include: Cylinder head (110); A dual fuel injector (120) is disposed inside the cylinder head (110); A dual fuel rail (130) is arranged outside the cylinder head (110) and mounted on the cylinder head (110), and is provided with a first oil supply passage (130a) and a second oil supply passage (130b); A two-way transmission pipe (140) is installed on the cylinder head (110), and is provided with a first transfer channel (140a), a second transfer channel (140b), an oil leakage transfer channel (140c) and a manifold (140d); the first transfer channel (140a) is connected to the first oil supply channel (130a) and the dual-fuel injector (120); the second transfer channel (140b) is connected to the second oil supply channel (130b) and the dual-fuel injector (120); the inner wall of the manifold (140d) and the dual-fuel injector (120) are combined to form a manifold cavity; one end of the oil leakage transfer channel (140c) is connected to the manifold (140d), and the other end is located outside the cylinder head (110).

2. The dual fuel engine according to claim 1, characterized in that: The dual fuel rail (130) is further provided with a mounting hole (130c), and the outlets of the first oil supply channel (130a) and the second oil supply channel (130b) are both provided on the inner wall of the mounting hole (130c); one end of the dual-pass transmission pipe (140) located outside the cylinder head (110) is located in the mounting hole (130c) and is tightly connected to the inner wall of the mounting hole (130c), and the inlet of the first transfer channel (140a) is aligned with the outlet of the first oil supply channel (130a), and the inlet of the second transfer channel (140b) is aligned with the outlet of the second oil supply channel (130b).

3. The dual fuel engine according to claim 2, characterized in that: The mounting hole (130c) is a through hole, and the dual-pass transmission pipe (140) can pass through the mounting hole (130c). The dual-fuel engine (100) further comprises a pressure plate mechanism (150), and the pressure plate mechanism (150) is mounted on the cylinder head (110) or the dual fuel rail (130) and abuts against one end of the dual-pass transmission pipe (140) away from the dual fuel injector (120).

4. The dual fuel engine according to claim 3, characterized in that: The pressure plate mechanism (150) comprises a pressure plate (151) and a first connecting member (152), wherein the first connecting member (152) is connected to the pressure plate (151) and the dual fuel rail (130), and the pressure plate (151) abuts against the dual-pass transmission pipe (140).

5. The dual fuel engine according to claim 4, characterized in that: One end of the dual-pass transmission pipe (140) away from the dual-fuel injector (120) is flush with the dual fuel rail (130), and one end of the dual-pass transmission pipe (140) away from the dual fuel injector (120) is provided with a pull-out fitting hole (140e); the dual-fuel engine (100) further comprises a second connecting member (190), and the second connecting member (190) is connected to the dual fuel rail (130) and the cylinder head (110).

6. The dual fuel engine according to claim 3, characterized in that: The dual-fuel injector (120) comprises an injector body (121) and a connecting sleeve (122) fixedly connected to the injector body (121); the injector body (121) has a first injection inlet (121a) and a second injection inlet (121b) located inside the connecting sleeve (122); the two-way transmission pipe (140) is located inside the connecting sleeve (122); the outlet of the first transfer channel (140a) is connected to the first injection inlet (121a); ​​and the outlet of the second transfer channel (140b) is connected to the second injection inlet (121b). The dual-fuel engine (100) further comprises a first sealing gasket (165) and a first sealing ring (170), wherein the first sealing gasket (165) is arranged between the two-way transmission pipe (140) and the injector body (121), the two-way transmission pipe (140) abuts against the first sealing gasket (165), the first sealing ring (170) is sleeved on the two-way transmission pipe (140) and is located between the two-way transmission pipe (140) and the connecting sleeve (122), and the collecting groove (140d) is arranged between the first sealing ring (170) and the first sealing gasket (165).

7. The dual fuel engine according to any one of claims 2 to 6, characterized in that: The first oil supply passage (130a) and the second oil supply passage (130b) are arranged at intervals along the height direction of the dual-fuel engine (100), and the first transfer passage (140a) and the second transfer passage (140b) are also arranged at intervals along the height direction of the dual-fuel engine (100), and the mounting hole (130c) is arranged between the first oil supply passage (130a) and the second oil supply passage (130b).

8. The dual fuel engine according to any one of claims 1 to 6, characterized in that: The cylinder head (110) has a side wall provided with an avoidance hole (110a), and the dual-pass transmission pipe (140) extends into the cylinder head (110) through the avoidance hole (110a); the dual fuel rail (130) is fixedly mounted on the cylinder head (110); the dual fuel engine (100) further comprises a second sealing ring (175) and a second sealing gasket (180); the second sealing ring (175) is sleeved outside the dual-pass transmission pipe (140) and is located between the dual-pass transmission pipe (140) and the inner wall of the avoidance hole (110a); the second sealing gasket (180) is sleeved outside the dual-pass transmission pipe (140) and is located between the dual-pass transmission pipe (140) and the cylinder head (110); the dual fuel rail (130) abuts against the second sealing gasket (180).

9. The dual fuel engine according to any one of claims 1 to 6, characterized in that: The dual fuel rail (130) is further provided with an oil drain channel (130d), the inlet of which is connected to the outlet of the oil drain transfer channel (140c), and the dual fuel engine (100) further comprises a collecting tank, the inlet of which is connected to the outlet of the oil drain channel (130d).

10. A vehicle, characterized in that: The dual-fuel engine (100) comprises the dual-fuel engine (100) according to any one of claims 1 to 9.

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