A dual fuel engine and vehicle

Abstract

The application discloses a dual-fuel engine and a vehicle, and belongs to the technical field of engines. The dual-fuel engine comprises a cylinder cover, a dual-fuel injector arranged on the inner side of the cylinder cover, a dual-fuel rail 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; a dual-channel transmission pipe is mounted on the cylinder cover, and a first transfer channel, a second transfer channel, a drain transfer channel and a flow collection groove are formed in the dual-channel transmission pipe; the first transfer channel is communicated with the first oil supply channel and the dual-fuel injector; the second transfer channel is communicated with the second oil supply channel and the dual-fuel injector; the inner wall of the flow collection groove and the dual-fuel injector enclose a flow collection cavity; one end of the drain transfer channel is communicated with the flow collection groove, and the other end of the drain transfer channel is located outside the cylinder cover.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of engines, and particularly relates to a dual-fuel engine and a vehicle. BACKGROUND

[0002] The dual-fuel engine high-pressure direct injection technology, also known as HPDI technology, has a technical core that is to complete the injection of two kinds of fuel by one injector. Currently, many companies are adopting this technology.

[0003] Two sets of fuel supply systems are very challenging to install and arrange, involving pipeline routing, sealing, structure and other aspects. The matching and manufacturing process of the whole vehicle, and the maintenance convenience are affected.

[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 disassembled and assembled when disassembling and assembling. SUMMARY

[0005] The application aims to at least solve the technical problem of the inconvenience of disassembling and assembling the cover of the dual-fuel engine. To this end, the application provides a dual-fuel engine and a vehicle.

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

[0007] a cylinder head;

[0008] a dual-fuel injector arranged on the inner side of the cylinder head;

[0009] a dual-fuel rail arranged on the outer side of the cylinder head and mounted on the cylinder head, and provided with a first oil supply channel and a second oil supply channel;

[0010] a dual-pass transmission pipe mounted on the cylinder head and provided with a first transfer channel, a second transfer channel, a drain transfer channel and a flow collection groove, the first transfer channel is communicated with the first oil supply channel and the dual-fuel injector, the second transfer channel is communicated with the second oil supply channel and the dual-fuel injector, the inner wall of the flow collection groove and the dual-fuel injector enclose a flow collection cavity, one end of the drain transfer channel is communicated with the flow collection 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, the outlets of the first oil supply channel and the second oil supply channel are arranged on the inner wall of the mounting hole; one end of the dual-pass transmission pipe located outside the cylinder head is located in the mounting hole and is in sealed connection with the inner wall of the mounting hole, and the inlet of the first transfer channel is aligned with the outlet of the first oil supply channel, and the inlet of the second transfer channel is aligned with the outlet of the second oil supply channel.

[0012] In some embodiments, the mounting hole is a through hole, and the dual-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 the end of the dual-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 dual-way transmission pipe away from the dual fuel injector is flush with the dual fuel rail, and an extraction fitting hole is formed in the one end of the dual-way transmission pipe away from the dual fuel injector; the dual-fuel engine further includes a second connecting member 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 has 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 transfer channel and the second transfer channel are also spaced apart along the height direction of the dual-fuel engine, and the mounting hole is provided 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 mounted on the cylinder head, and the dual-fuel engine further 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 further defines an oil drain channel, the inlet of which is connected to the outlet of the oil drain transfer channel. The dual fuel engine further comprises a collection 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 engine's dual fuel rail and dual-pass transfer pipe are both mounted on the cylinder head, not the cover. This eliminates the need to remove the dual fuel rail and dual-pass transfer pipe when removing the cover, facilitating cover removal and, in turn, facilitating inspection of various internal engine components. The dual-fuel engine integrates the first and second fuel supply channels, which transport the two fuels, into the dual fuel rail, and the first and second transfer channels, which transport the two fuels, into the dual-pass transfer pipe. This design reduces piping requirements and helps reduce the engine's overall dimensions, making it suitable for a variety of vehicle models. By providing a manifold and drain transfer channel within the dual-pass transfer pipe, any leaked fuel from the dual-pass transfer pipe and dual-fuel injector, if not properly sealed, can be collected in the manifold and drained out of the dual-fuel engine through the drain transfer channel. This prevents leaked fuel from entering the engine and potentially damaging it. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, a brief introduction will be given below 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 any 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 in the AA direction.

[0025] Figure 3 Shown 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 in CC direction.

[0031] Figure 9 Shown 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 - dual-pass transmission pipe, 140d - first transfer channel, 140d - second oil supply ... 0b-second transfer channel, 140c-oil leakage transfer channel, 140d-collecting groove, 140e-pull-out fitting hole, 150-pressure plate mechanism, 151-pressure plate, 151a-oil leakage port, 151b-connecting part avoidance hole, 152-first connecting part, 160-cylinder head, 165-first sealing gasket, 170-first sealing ring, 175-second sealing ring, 180-second sealing gasket, 185-third sealing ring, 190-cover, 195-second connecting part. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall 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 and movement status of 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 specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0036] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not 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 such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this 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 the present invention.

[0037] In the related art, the cover of a dual-fuel engine has the technical problem of being difficult to disassemble and assemble. The embodiments of the present application provide a dual-fuel engine and a vehicle, which can at least to some extent solve the technical problem of the inconvenience of disassembling and assembling the cover of a dual-fuel engine.

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

[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 is 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 drain 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, and 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 together form a manifold cavity. One end of the oil drain transfer channel 140c is connected to the manifold 140d, and the other end is located outside the cylinder head 110.

[0040] The cover 190 is mounted 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 diverse and well 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 the two fuels simultaneously or separately, which can achieve more precise fuel mixing and a more optimized combustion process. The structure of the dual-fuel injector 120 is also well known to those skilled in the art and is not limited here.

[0041] The dual fuel rail 130 is located outside and mounted 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. A two-way transfer pipe 140 connects the dual fuel rail 130 with the dual fuel injectors 120. As can be easily understood, the outlet of the first fuel supply channel 130a is connected to the inlet of the first transfer channel 140a, thereby connecting the first fuel supply channel 130a with 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, thereby connecting the second fuel supply channel 130b with the second transfer channel 140b. It is easy to understand that the outlet of the first transfer channel 140a is connected to the first injection inlet 121a of the dual-fuel injector 120, thereby establishing communication between the first transfer channel 140a and the dual-fuel injector 120; the outlet of the second transfer channel 140b is connected to the second injection inlet 121b of the dual-fuel injector 120, thereby establishing communication between the second transfer channel 140b and the dual-fuel injector 120. The dual-fuel injector 120 and the dual-way transfer pipe 140 can be connected via a high-pressure oil pipe.

[0042] It should be noted that it can be combined with Figure 3 and Figure 6 As shown, a manifold 140d is formed on the outer surface of the dual-way delivery tube 140, at the end where the dual-way delivery tube 140 connects to the dual-fuel injector 120. The inner wall of the manifold 140d and the dual-fuel injector 120 together form a manifold. If the seal between the dual-way delivery tube 140 and the dual-fuel injector 120 is not tight and fuel leaks through the gap between the two tubes 140 and 120, the fuel will flow into the manifold and be discharged through the oil drain transfer channel 140c.

[0043] The dual-fuel engine 100's dual fuel rail 130 and dual-pass transfer pipe 140 are both mounted on the cylinder head 110, not on the cover 190. This eliminates the need to remove the dual fuel rail 130 and dual-pass transfer pipe 140 when removing the cover 190, facilitating removal of the cover 190 and, in turn, facilitating inspection of various internal engine components. The dual-fuel engine 100 integrates the first and second fuel supply channels 130a, 130b, which transport two fuels, into the dual fuel rail 130, and the first and second transfer channels 140a, 140b, which transport two fuels, into the dual-pass transfer pipe 140. This design reduces piping requirements and helps reduce the overall size of the dual-fuel engine 100, making it suitable for a variety of vehicle models. By providing a collecting groove 140d and an oil leakage transfer channel 140c in the dual-pass transmission pipe 140, when the dual-pass transmission pipe 140 and the dual-fuel injector 120 are not tightly sealed, leaked fuel can be collected 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 leaked fuel from being injected into the dual-fuel engine 100 and 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 connect 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 further defines a mounting hole 130c, and the outlets of the first fuel supply channel 130a and the second fuel supply channel 130b are both defined on the inner wall of the mounting hole 130c. One end of the two-way transfer pipe 140 located outside the cylinder head 110 is located within the mounting hole 130c and is sealedly connected to the inner wall of the mounting hole 130c. 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 defined in the dual fuel rail 130 , and an inner wall of the mounting hole 130 c defines 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 fuel supply channel 130a, so that the fuel in the first fuel 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 fuel supply channel 130b, so that the fuel in the second fuel supply channel 130b flows into the second transfer channel 140b. In these embodiments, the dual fuel rail 130 and the dual-way delivery pipe 140 are directly connected, eliminating the need for connecting components such as high-pressure fuel pipes. This 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-way delivery pipe 140 and the dual fuel rail 130 are sealed to prevent fuel leakage through the gap between the dual-way delivery 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. The two-way transmission pipe 140 and the inner wall of the mounting hole 130c clamp the third sealing ring 185. 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, multiple 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 inlet of the first transfer channel 140a, and there is also at least one third sealing ring 185 on both sides of the inlet of the second transfer channel 140b. Figure 3 As shown, there is at least one third sealing ring 185 on both 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 both the left and right sides of the entrance of the second transfer channel 140b.

[0050] In some embodiments, along the length direction of the dual-pass transmission tube 140, the inlet of the first transfer channel 140a and the inlet of the second transfer channel 140b are spaced apart, such as Figure 3As shown, three third sealing rings 185 are provided, one of which is arranged on the 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 the 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-way transmission pipe 140 can pass through the through hole. The dual-fuel engine 100 further includes a pressure plate mechanism 150, which is mounted on the cylinder head 110 or the dual fuel rail 130 and abuts against one end of the dual-way transmission pipe 140 away from the dual fuel injector 120.

[0052] That is, the size of the two-way delivery tube 140 is smaller than the size of the mounting hole 130c, and the end of the two-way delivery tube 140 connected to the dual fuel injector 120 can be inserted through the mounting hole 130c. The pressure plate mechanism 150 is fixedly connected to the cylinder head 110 or the dual fuel rail 130. After the pressure plate mechanism 150 is fixedly connected to the cylinder head 110 or the dual fuel rail 130, the pressure plate mechanism 150 presses the end of the two-way delivery tube 140 away from the dual fuel injector 120, forcing the two-way delivery tube 140 against the dual fuel injector 120, thereby connecting the two-way delivery tube 140 and the dual fuel injector 120. With this design, the two-way delivery tube 140 can be inserted into the mounting hole 130c to align and communicate with the dual fuel injector 120 and the dual fuel rail 130. Once the two-way delivery tube 140 is properly inserted, it is compressed by the pressure plate mechanism 150, securing the two-way delivery tube 140 and preventing it from loosening. This design facilitates the installation and disassembly of the dual-way transmission pipe 140 . The dual-way transmission pipe 140 can be removed from the dual-fuel engine 100 without disassembling the dual fuel rail 130 , facilitating the inspection and maintenance of the dual-way 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 connector avoidance hole 151b is opened on the pressure plate 151 to avoid the first connector 152. The first connector 152 passes through the avoidance hole 110a and is threadedly connected to the dual fuel rail 130. During the threaded connection process, the first connector 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. The two bolts 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 dual-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 defined at the one end of the dual-way transmission pipe 140 away from the dual fuel injector 120; the dual-fuel engine 100 further includes a second connecting member 195, which is connected to the dual fuel rail 130 and the cylinder head 110.

[0058] The extraction hole 140e can be a threaded hole primarily designed to engage a removal tool, facilitating the tool's application of force to the dual-way delivery tube 140, thereby facilitating removal of the dual-way delivery tube 140 from the dual fuel rail 130, the cylinder head 110, and the dual fuel injectors 120. In some embodiments, the extraction hole 140e is a threaded hole, with one end of the removal tool having a matching external thread. After the removal tool is threadedly engaged with the threaded hole, a pulling force applied to the removal tool away from the dual fuel injectors 120 can be applied to remove the dual-way delivery tube 140. The second connector 195 can be a bolt, screw, or the like. The second connector 195 passes through the dual fuel rail 130 and is threadedly engaged with the cylinder head 110, compressing the dual fuel rail 130 and securing it to the cylinder head 110. The second connector 195 connects the dual fuel rail 130 and the cylinder head 110, facilitating assembly and disassembly 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 inside 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 functions as a fuel injector. The connecting sleeve 122 is used to interface with the dual-way transfer tube 140. Specifically, the injector body 121 has a first injection inlet 121a and a second injection inlet 121b, both located inside the connecting sleeve 122. The end of the dual-way transfer tube 140, distal to the dual fuel rail 130, is located within the connecting sleeve 122. The outlets of the first and second transfer channels 140a, 140b, and the manifold 140d are all located at the end of the dual-way transfer tube 140 distal to the dual fuel rail 130. The outlet of the first transfer channel 140a communicates with the first injection inlet 121a, allowing fuel within the first transfer channel 140a to be delivered to the injector body 121. The outlet of the second transfer channel 140b communicates with the second injection inlet 121b, allowing fuel within the second transfer channel 140b to be delivered to the injector body 121.

[0062] These embodiments achieve a 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 achieve a 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. The first sealing gasket 165 deforms to fill the gap between the two-way transmission tube 140 and the injector body 121, thereby achieving a sealed connection between the two-way transmission tube 140 and the injector body 121. Specifically, the first sealing ring 170 is arranged between the two-way transmission tube 140 and the connecting sleeve 122. The two-way transmission tube 140 and the connecting sleeve 122 clamp the first sealing ring 170. The first sealing ring 170 fills the gap between the two-way transmission tube 140 and the connecting sleeve 122, thereby achieving a sealed connection between the two-way transmission tube 140 and the connecting sleeve 122. With this design, two seals are formed between the dual-way transmission pipe 140 and the dual-fuel injector 120, ensuring the sealing effect between the dual-way transmission pipe 140 and the dual-fuel injector 120, and the fuel is not easily leaked through the gap between the dual-way 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. If the first sealing gasket 165 is not tightly sealed, fuel may leak into the manifold 140d and out through the oil drain transfer channel 140c. This prevents the leaked fuel from being injected into the dual-fuel engine 100 and causing damage to 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 transfer channel 140a and the second transfer channel 140b are also spaced apart along the height direction of the dual-fuel engine 100, and the mounting hole 130c is provided between the first oil supply channel 130a and the second oil supply channel 130b.

[0066] like Figure 2As shown, the first fuel supply passage 130a and the second fuel supply passage 130b are located at the top and the bottom, respectively. The first fuel supply passage 130a and the second fuel supply passage 130b are spaced apart in the height direction of the dual-fuel engine 100, so that the first fuel supply passage 130a and the second fuel supply passage 130b are spaced apart in the height direction of the dual-fuel engine 100. This facilitates the avoidance of the first connector 152 and the second connector 195, allowing the first connector 152 to be connected between the first fuel supply passage 130a and the second fuel supply passage 130b of the dual fuel rail 130. This allows the second connector 195 to pass through the area between the first fuel supply passage 130a and the second fuel supply passage 130b of the dual fuel rail 130 and connect to the cylinder head 110, thereby facilitating the arrangement of the first connector 152 and the second connector 195. With this design, the mounting hole 130c can be opened between the first oil supply passage 130a and the second oil supply passage 130b, so that the two-way transmission pipe 140 is located between the first oil supply passage 130a and the second oil supply passage 130b, which can facilitate communication between the two-way transmission pipe 140 and the dual fuel rail 130. The first transfer passage 140a and the second transfer passage 140b are spaced apart along the height direction of the dual-fuel engine 100, which helps to reduce the width of the two-way transmission pipe 140, allowing it to 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 arranged in sequence downwardly along the height direction of the dual-fuel engine 100. With this design, the first oil supply channel 130a is adjacent to the first transfer channel 140a, facilitating communication between the first oil supply channel 130a and the first transfer channel 140a; and the second transfer channel 140b is adjacent to the second oil supply channel 130b, facilitating communication between the second transfer channel 140b and the second oil supply channel 130b.

[0068] like Figure 7 、 Figure 8 and Figure 9 As shown, in some embodiments, a sidewall of the cylinder head 110 is provided with an avoidance hole 110 a, through which the dual-way transmission pipe 140 extends into the cylinder head 110; the dual fuel rail 130 is fixedly mounted 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 dual-way transmission pipe 140 and is located between the dual-way transmission pipe 140 and the inner wall of the avoidance hole 110 a. The second sealing gasket 180 is sleeved on the outside of the dual-way transmission pipe 140 and is located between the dual-way transmission pipe 140 and the cylinder head 110, and the dual fuel rail 130 abuts against the second sealing gasket 180.

[0069] A second sealing ring 175 is disposed between the dual-way transmission pipe 140 and the inner wall of the avoidance hole 110a. These two walls clamp the second sealing ring 175, filling the gap between them. This seals the connection and prevents fuel from leaking from the cylinder head 110 through the gap. A second sealing gasket 180 is sleeved over the dual-way transmission pipe 140. After the dual fuel rail 130 is connected to the cylinder head 110, the dual fuel rail 130 presses against the second sealing gasket 180, sealing 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, preventing 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 Figure 9 As shown, in some embodiments, the dual fuel rail 130 further defines an oil drain channel 130d, the inlet of the oil drain channel 130d being connected to the outlet of the oil drain transfer channel 140c. The dual fuel engine 100 further includes a collection tank (not shown), the inlet of the collection tank being 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 to the outlet of the oil drain transfer channel 140c, so that fuel leaked from each dual-pass transmission pipe 140 is collected in the oil drain channel 130d and then collected in a collection tank along the oil drain channel 130d, thereby preventing the fuel from being directly discharged outside the engine. The engine temperature is relatively high, and direct discharge outside the engine may cause the fuel to be ignited by the high temperature. In addition, direct discharge outside the engine may cause contamination of 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 contaminating the engine and other components on the vehicle body on the other hand.

[0072] The dual-fuel engine 100 typically includes multiple dual-way delivery pipes 140 and multiple dual-fuel injectors 120 to supply fuel to different cylinders. A single dual fuel rail 130 can be provided, with one dual fuel rail 130 simultaneously supplying fuel to multiple dual-way delivery pipes 140. The number of dual fuel rails 130, dual-way delivery pipes 140, and dual fuel injectors 120 is not limited in this application.

[0073] Based on the same inventive concept, the present invention also provides a vehicle including the aforementioned dual-fuel engine 100. Since the vehicle includes the aforementioned dual-fuel engine 100, it naturally has all the beneficial effects of the dual-fuel engine 100, which will not be described in detail 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" 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 can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can 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 ordinary technicians in this field can implement them. When the combination of technical solutions is mutually 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 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 intent 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 arranged 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 channel (130a) and a second oil supply channel (130b); a two-way transmission pipe (140), mounted on the cylinder head (110), and provided with a first transfer channel (140a), a second transfer channel (140b), an oil drain 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) together form a manifold; one end of the oil drain transfer channel (140c) is connected to the manifold (140d), and the other end is located outside the cylinder head (110); 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).

2. The dual-fuel engine according to claim 1, 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 includes a pressure plate mechanism (150), which 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).

3. The dual-fuel engine according to claim 2, 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).

4. The dual-fuel engine according to claim 3, 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), the second connecting member (190) being connected to the dual-fuel rail (130) and the cylinder head (110).

5. The dual-fuel engine according to claim 2, 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 includes 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), and 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). The collecting groove (140d) is arranged between the first sealing ring (170) and the first sealing gasket (165).

6. The dual-fuel engine according to any one of claims 1 to 5, characterized in that: The first oil supply channel (130a) and the second oil supply channel (130b) are arranged at intervals along the height direction of the dual-fuel engine (100), and the first transfer channel (140a) and the second transfer channel (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 channel (130a) and the second oil supply channel (130b).

7. The dual-fuel engine according to any one of claims 1 to 5, characterized in that: The side wall of the cylinder head (110) is 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 on the outside of 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 on the outside of 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).

8. The dual-fuel engine according to any one of claims 1 to 5, 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). 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).

9. A vehicle, characterized in that: The dual-fuel engine (100) comprises the dual-fuel engine (100) according to any one of claims 1 to 8.

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