Intake manifold, methanol engine and vehicle

Abstract

The utility model discloses a kind of air intake manifold, methanol engine and vehicle, it is related to methanol engine technical field, wherein, air intake manifold includes manifold body and curve waste gas passage, the manifold body is equipped with pressure stabilizing chamber;The curve waste gas passage is located on the manifold body, the curve waste gas passage is equipped with sequentially communicating waste gas inlet, arcuate separation section and waste gas outlet, the arcuate separation section is arched towards the top of the manifold body, the waste gas inlet is used to communicate with the waste gas discharge port of crankcase, the waste gas outlet is communicated with the pressure stabilizing chamber.The technical scheme provided by the utility model can improve the service life of air intake manifold sealing ring, while reducing the risk of throttle icing due to water condensation in winter.

Description

Technical Field

[0001] This utility model relates to the field of methanol engine technology, and in particular to an intake manifold, a methanol engine, and a vehicle. Background Technology

[0002] In modern internal combustion engine systems, in order to meet increasingly stringent emission requirements and improve fuel economy, it has become a common practice to introduce crankcase exhaust gas (referred to as "crankcase exhaust gas") into the intake system for secondary combustion, so as to achieve effective control and reuse of exhaust gas.

[0003] However, when the engine uses methanol fuel, the water vapor produced by combustion enters the bypass exhaust passage with the exhaust gas, and eventually condenses and accumulates in the bypass exhaust passage and the pressure regulating chamber. This moisture can mix with residual methanol, causing swelling and corrosion of the sealing ring installed at the outlet of the pressure regulating chamber, significantly shortening its service life. In addition, in low-temperature winter environments, the liquid water accumulated in the pressure regulating chamber may also flow into the intake manifold, causing the throttle body to freeze and affecting the normal operation of the engine. Utility Model Content

[0004] The main purpose of this invention is to propose an intake manifold, a methanol engine, and a vehicle, which aims to improve the service life of the intake manifold seal ring while reducing the risk of throttle body icing due to moisture condensation in winter.

[0005] To achieve the above objectives, the intake manifold proposed in this utility model includes: Manifold body, wherein the manifold body is provided with a pressure regulating chamber; and A curved exhaust gas passage is provided on the manifold body. The curved exhaust gas passage has an exhaust gas inlet, an arched separation section and an exhaust gas outlet connected in sequence. The arched separation section arches towards the top of the manifold body. The exhaust gas inlet is used to connect with the exhaust gas outlet of the crankcase, and the exhaust gas outlet is connected with the pressure stabilizing chamber.

[0006] In one embodiment, the curved exhaust gas passage is further provided with a curved section, which is located between the exhaust gas inlet and the arched separation section.

[0007] In one embodiment, the curved exhaust gas passage is further provided with a liquid storage section, which is located between the curved section and the arched separation section.

[0008] In one embodiment, the length of the liquid storage section is greater than the width of the curved section, and the liquid storage section protrudes toward the side of the curved section away from the arched separation section.

[0009] In one embodiment, the manifold body is provided with a mounting hole for connecting to the cylinder head, and the mounting hole is located inside the arched opening of the arched separation section.

[0010] In one embodiment, the manifold body is further provided with a throttle valve, and the exhaust outlet is located away from the throttle valve.

[0011] In one embodiment, the intake manifold further includes a sealing ring, the manifold body has a mounting end face that mates with the cylinder head, the outlet of the pressure regulating chamber is located on the mounting end face, the mounting end face has a mounting ring groove around the outlet, the sealing ring is located in the mounting ring groove and is used for the cylinder head to press against it.

[0012] In one embodiment, the sealing ring includes a sealing body and a sealing ring edge protruding toward the inner side of the sealing body. The sealing body is at least partially disposed within the mounting ring groove, and the sealing ring edge is disposed on the mounting end face and is used for the cylinder head to press against it.

[0013] In one embodiment, the mounting ring groove has a first side groove wall and a second side groove wall disposed opposite to each other, the mounting end face is formed on the end faces of the first side groove wall and the second side groove wall, the first side groove wall is disposed close to the pressure stabilizing cavity, the height of the first side groove wall is lower than the height of the second side groove wall, and the sealing ring edge is disposed on the end face of the first side groove wall.

[0014] In one embodiment, the sealing body includes a first segment and a second segment connected together, the sealing ring is disposed between the first segment and the second segment, the first segment is disposed in the mounting ring groove, and the second segment is used to connect with the cylinder head.

[0015] This utility model also proposes a methanol engine, including the above-mentioned intake manifold.

[0016] This utility model also proposes a vehicle including the aforementioned methanol engine.

[0017] The technical solution of this utility model incorporates an arched separation section within the curved exhaust gas passage, which arches upwards towards the top of the manifold body. When the curved exhaust gas generated by the crankcase enters the curved exhaust gas passage through the exhaust gas inlet and flows through the arched separation section, this section can, to a certain extent, separate some of the engine oil in the curved exhaust gas, as well as water and alcohol liquids generated after condensation in the curved exhaust gas under low-temperature conditions. Furthermore, in the airflow direction of the curved exhaust gas passage, it blocks engine oil, condensed water, and methanol liquids at the front of the arched separation section, thereby preventing these liquids from flowing directly to the exhaust gas outlet, and thus reducing the inflow of condensed water and alcohol liquids into the pressure stabilizing chamber. This reduces the amount of water and methanol liquids entering the pressure stabilizing chamber, preventing water and methanol liquids from soaking and corroding the sealing ring at the outlet of the pressure stabilizing chamber, thereby improving the service life of the sealing ring. It is understood that if the condensate and methanol mixture accumulates at the outlet of the pressure stabilizing chamber, it will exacerbate the swelling and corrosion of the sealing ring at the outlet of the pressure stabilizing chamber. Under high-temperature conditions, the sealing ring is in prolonged contact with alcohol vapors and related gaseous substances, which can cause it to swell. The presence of liquid mixtures significantly accelerates this process. Furthermore, the arched separation section effectively reduces the amount of water and methanol entering the pressure regulating chamber, thus preventing water accumulation at the throttle body and significantly reducing the risk of throttle body icing due to moisture condensation in winter. Therefore, this solution can extend the service life of the intake manifold sealing ring while reducing the risk of throttle body icing due to moisture condensation in winter. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 A first-view structural schematic diagram of an embodiment of the intake manifold provided by this utility model; Figure 2 A second-view structural schematic diagram of an embodiment of the intake manifold provided by this utility model; Figure 3 A partially enlarged view of the manifold body and sealing ring of the intake manifold provided by this utility model; Figure 4 A cross-sectional view of the intake manifold and cylinder head provided by this utility model; Figure 5 A partially enlarged view of the sealing positions of the intake manifold and cylinder head provided for the utility model.

[0020] Explanation of icon numbers: 10. Intake manifold; 100. Manifold body; 110. Pressure regulating chamber; 120. Mounting hole; 130. Mounting end face; 140. Mounting ring groove; 141. First side groove wall; 142. Second side groove wall; 200. Turbulent exhaust gas passage; 210. Exhaust gas inlet; 220. Arched separation section; 230. Exhaust gas outlet; 240. Turbulent section; 250. Liquid storage section; 300. Sealing ring; 310. Sealing body; 311. First section; 312. Second section; 320. Sealing ring edge; 20. Cylinder head.

[0021] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0023] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0024] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0025] This utility model proposes an intake manifold 10.

[0026] Please see Figure 1 and Figure 2In one embodiment of the present invention, the intake manifold 10 includes a manifold body 100 and a curved exhaust gas passage 200. The manifold body 100 is provided with a pressure stabilizing chamber 110. The curved exhaust gas passage 200 is disposed on the manifold body 100 and is provided with an exhaust gas inlet 210, an arched separation section 220 and an exhaust gas outlet 230 connected in sequence. The arched separation section 220 arches towards the top of the manifold body 100. The exhaust gas inlet 210 is used to communicate with the exhaust gas outlet of the crankcase, and the exhaust gas outlet 230 is connected with the pressure stabilizing chamber 110.

[0027] The technical solution of this utility model includes an arched separation section 220 in the curved exhaust gas passage 200, which arches towards the top of the manifold body 100. When the curved exhaust gas generated by the crankcase enters the curved exhaust gas passage 200 through the exhaust gas inlet 210 and flows through the arched separation section 220, the arched separation section 220 can separate some of the engine oil in the curved exhaust gas, as well as the water and alcohol liquids generated after condensation in the curved exhaust gas under low temperature conditions. Furthermore, in the airflow direction of the curved exhaust gas passage 200, the engine oil, condensed water, and methanol are blocked at the front of the arched separation section 220, thereby preventing the engine oil, condensed water, and methanol liquids from flowing directly to the exhaust gas outlet 230, that is, reducing the inflow of condensed water and alcohol liquids into the pressure stabilizing chamber 110. This reduces the content of water and methanol liquids entering the pressure stabilizing chamber 110, preventing water and methanol liquids from soaking and corroding the sealing ring 300 located at the outlet of the pressure stabilizing chamber 110, thus helping to extend the service life of the sealing ring 300. It is understandable that if the condensate and methanol mixture accumulates at the outlet of the pressure regulating chamber 110, it will exacerbate the swelling and corrosion of the sealing ring 300 at the outlet of the pressure regulating chamber 110. Under high-temperature conditions, the sealing ring 300 is in prolonged contact with alcohol vapor and related gaseous substances, which may itself cause swelling; the presence of the liquid mixture will significantly accelerate this process. Furthermore, since the arched separation section 220 effectively reduces the amount of water and methanol entering the pressure regulating chamber 110, it also prevents water from accumulating at the throttle body, thereby significantly reducing the risk of throttle body icing due to moisture condensation in winter. Therefore, this solution can improve the service life of the intake manifold 10 sealing ring 300 while reducing the risk of throttle body icing due to moisture condensation in winter.

[0028] It should be noted that in high-temperature environments, such as after a methanol engine is started, the temperature of the intake manifold 10 will rise, thereby evaporating and vaporizing the oil, condensed water, and methanol in the curved exhaust gas passage 200. The vaporized oil, water, and methanol will pass through the arched separation section 220 and enter the pressure stabilizing chamber 110, and then enter the combustion chamber to participate in combustion.

[0029] Optionally, the curved exhaust gas passage 200 is located at the upper part of the manifold body 100, that is, above the pressure regulating chamber 110, the exhaust gas inlet 210 is located on the top surface of the manifold body 100, and the fresh air inlet is located on the bottom surface of the manifold body 100, that is, below the pressure regulating chamber 110. This ensures the intake volume of fresh air and maximizes the intake efficiency and the uniformity of intake for each cylinder. Of course, in other embodiments, the fresh air inlet can also be located on the side of the manifold body 100, which is not limited here.

[0030] In one embodiment of this utility model, the intake manifold 10 further includes a curved exhaust gas connector, which is disposed on the intake manifold 10 and communicates with the exhaust gas inlet 210 of the curved exhaust gas passage 200. This allows for easy connection to the low-load curved pipe of the crankcase, i.e., the curved exhaust hose, so that the curved exhaust gas in the crankcase flows into the curved exhaust gas passage 200, and then into the engine intake manifold to participate in combustion.

[0031] Optionally, the tortuous exhaust gas passage 200 is further provided with a tortuous section 240, which is located between the exhaust gas inlet 210 and the arched separation section 220. It can be understood that the tortuous section 240 allows the crankcase blow-by gas to change its airflow direction and velocity before entering the arched separation section 220. During this process, heavier oil droplets in the exhaust gas impact the cavity wall under inertia and condense. The separated liquid oil can flow back to the oil pan through the oil return hole, while the preliminarily purified gas continues to flow towards the arched separation section 220 and the intake manifold 10.

[0032] Optionally, in this embodiment, the curved exhaust gas passage 200 is further provided with a liquid storage section 250, which is located between the curved section 240 and the arched separation section 220. It can be understood that the liquid storage section 250 is mainly used to temporarily collect and store liquid components such as engine oil, water, and methanol initially separated by the curved section 240. Under low-temperature conditions, the above-mentioned mixture (engine oil, water, and methanol liquid components) can be temporarily stored in the liquid storage section 250. After the engine operating temperature rises, the temporarily stored mixture gradually vaporizes and re-enters the combustion chamber with the airflow to participate in combustion. This effectively prevents the separated liquid substances from directly entering the pressure stabilizing chamber 110 through the exhaust gas outlet 230, thereby preventing liquid accumulation in the pressure stabilizing chamber 110 and causing swelling and corrosion of the sealing ring 300 at the outlet of the pressure stabilizing chamber 110, and also preventing liquid water from accumulating at the throttle valve and causing icing problems in winter. Of course, this solution is not limited to this. In other embodiments, the liquid storage section 250 may be omitted, and the volume of the tortuous section 240 may be increased.

[0033] Optionally, the length of the liquid storage section 250 is greater than the width of the curved section 240, and the liquid storage section 250 protrudes towards the side of the curved section 240 away from the arched separation section 220. This increases the volume of the liquid storage section 250 and avoids insufficient volume of the liquid storage section 250, which would allow the mixture (oil, water, methanol, and other liquid components) to enter the pressure regulating chamber 110 through the arched separation section 220, thereby causing the sealing ring 300 at the outlet of the pressure regulating chamber 110 to swell and corrode, and liquid water to accumulate at the throttle valve, causing freezing in winter.

[0034] Optionally, the manifold body 100 is provided with a mounting hole 120 for connection with the cylinder head 20. The mounting hole 120 is located within the arched opening of the arched separation section 220. This allows the arched separation section 220, due to its unique arc-shaped structure, to both avoid the mounting hole 120 and perform gas-liquid separation. This results in a more compact structure for the intake manifold 10. However, this solution is not limited to this; in other embodiments, the mounting hole 120 may also be located outside the arched opening of the arched separation section 220.

[0035] Optionally, in this embodiment, the manifold body 100 is further provided with a throttle valve, and the exhaust outlet 230 is located away from the throttle valve. This allows the water discharged from the exhaust outlet 230 to be kept as far away from the throttle valve as possible, thereby preventing water vapor in the air-fuel mixture from condensing and falling onto the throttle valve plate when the engine is running at low speed and low load in winter.

[0036] Furthermore, in this embodiment, there is only one exhaust gas outlet 230, and the exhaust gas outlet 230 is located away from the throttle valve. It can be understood that this also allows the exhaust gas outlet 230 to be as close as possible to the outlet of the pressure regulating chamber 110, thereby ensuring the uniformity of the curved intake.

[0037] Furthermore, since the exhaust gas outlet 230 is connected to the pressure stabilizing chamber 110 and is close to the outlet of the pressure stabilizing chamber 110, the fresh air and the turbulent exhaust gas are basically mixed in the area close to the outlet of the pressure stabilizing chamber 110. This shortens the mixing path and contact time of the fresh air and the turbulent exhaust gas inside the pressure stabilizing chamber 110, effectively reducing the residence and diffusion range of water vapor in the turbulent exhaust gas in the low temperature area, thereby reducing the possibility of condensate generation.

[0038] Reference Figures 3 to 5Optionally, the intake manifold 10 further includes a sealing ring 300. The manifold body 100 has a mounting end face 130 that mates with the cylinder head 20. The outlet of the pressure regulating chamber 110 is located on the mounting end face 130. The mounting end face 130 has a mounting ring groove 140 around the outlet. The sealing ring 300 is located in the mounting ring groove 140 and is used for the cylinder head 20 to press against it. It can be understood that when the intake manifold 10 is installed with the cylinder head 20, as the mounting bolts are gradually screwed into the mounting holes 120, the sealing ring 300 will be gradually compressed, thereby making a sealing contact between the intake manifold 10 and the cylinder head 20 to ensure no gas leakage. In addition, the mounting ring groove 140 can increase the installation stability of the sealing ring 300.

[0039] Furthermore, the sealing ring 300 includes a sealing body 310 and a sealing ring edge 320 protruding inward from the sealing body 310. The sealing body 310 is at least partially disposed within the mounting ring groove 140, and the sealing ring edge 320 is disposed on the mounting end face 130 and is used for the cylinder head 20 to press against it. It can be understood that the sealing body 310 can further seal the intake manifold 10 and the cylinder head 20 to prevent leakage. The sealing ring edge 320 can achieve an interference seal between the intake manifold 10 and the cylinder head 20, preventing the alcohol-containing gas mixture from contacting the sealing body 310, thereby avoiding swelling and corrosion of the sealing body 310. On the other hand, since the contact area between the sealing ring edge 320 and the alcohol-containing mixture in the pressure regulating chamber 110 is small, only the edge of the sealing ring edge 320 contacts the alcohol-containing mixture. Even if the sealing ring edge 320 is in long-term contact with the alcohol-containing mixture, the area where swelling and corrosion occur is small, thus significantly improving the service life of the sealing ring 300.

[0040] Optionally, the mounting ring groove 140 has a first side groove wall 141 and a second side groove wall 142 disposed opposite to each other. The mounting end face 130 is formed on the end faces of the first side groove wall 141 and the second side groove wall 142. The first side groove wall 141 is disposed close to the pressure stabilizing chamber 110, and the height of the first side groove wall 141 is lower than the height of the second side groove wall 142. The sealing ring edge 320 is disposed on the end face of the first side groove wall 141. This allows for a certain amount of compression of the sealing ring edge 320 and also prevents the methanol mixture or liquid from contacting the sealing body 310, thus extending its service life. Of course, this solution is not limited to this. In other embodiments, the height of the first side groove wall 141 may also be equal to the height of the second side groove wall 142.

[0041] Furthermore, the sealing body 310 includes a first segment 311 and a second segment 312 connected to each other, and the sealing ring edge 320 is disposed between the first segment 311 and the second segment 312. The first segment 311 is disposed in the mounting ring groove 140, and the second segment 312 is used to connect with the cylinder head 20. This can further increase the sealing between the intake manifold 10 and the cylinder head 20.

[0042] This utility model also proposes a methanol engine, which includes an intake manifold. The specific structure of the intake manifold is as described in the above embodiments. Since this methanol engine adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0043] This utility model also proposes a vehicle that includes a methanol engine. The specific structure of the methanol engine is as described in the above embodiments. Since this vehicle adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0044] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An intake manifold, characterized in that, include: Manifold body, wherein the manifold body is provided with a pressure regulating chamber; and A curved exhaust gas passage is provided on the manifold body. The curved exhaust gas passage has an exhaust gas inlet, an arched separation section and an exhaust gas outlet connected in sequence. The arched separation section arches towards the top of the manifold body. The exhaust gas inlet is used to connect with the exhaust gas outlet of the crankcase, and the exhaust gas outlet is connected with the pressure stabilizing chamber.

2. The intake manifold as described in claim 1, characterized in that, The curved exhaust gas passage is further provided with a curved section, which is located between the exhaust gas inlet and the arched separation section.

3. The intake manifold as described in claim 2, characterized in that, The curved exhaust gas passage is also provided with a liquid storage section, which is located between the curved section and the arched separation section.

4. The intake manifold as described in claim 3, characterized in that, The length of the liquid storage section is greater than the width of the curved section, and the liquid storage section protrudes toward the side of the curved section away from the arched separation section.

5. The intake manifold as described in claim 1, characterized in that, The manifold body is provided with a mounting hole for connecting to the cylinder head, and the mounting hole is located inside the arched opening of the arched separation section.

6. The intake manifold as described in claim 1, characterized in that, The manifold body is also provided with a throttle valve, and the exhaust outlet is located away from the throttle valve.

7. The intake manifold as described in claim 1, characterized in that, The intake manifold also includes a sealing ring. The manifold body has a mounting end face that mates with the cylinder head. The outlet of the pressure regulating chamber is located on the mounting end face. The mounting end face has a mounting ring groove around the outlet. The sealing ring is located in the mounting ring groove and is used for the cylinder head to press against it.

8. The intake manifold as described in claim 7, characterized in that, The sealing ring includes a sealing body and a sealing ring edge protruding towards the inner side of the sealing body. The sealing body is at least partially disposed in the mounting ring groove, and the sealing ring edge is disposed on the mounting end face and is used for the cylinder head to press against it.

9. The intake manifold as described in claim 8, characterized in that, The mounting ring groove has a first side groove wall and a second side groove wall that are arranged opposite to each other. The mounting end face is formed on the end faces of the first side groove wall and the second side groove wall. The first side groove wall is located close to the pressure stabilizing cavity. The height of the first side groove wall is lower than the height of the second side groove wall. The sealing ring edge is located on the end face of the first side groove wall.

10. The intake manifold as described in claim 8, characterized in that, The sealing body includes a first section and a second section connected to each other, and the sealing ring is disposed between the first section and the second section. The first section is disposed in the mounting ring groove, and the second section is used to connect with the cylinder head.

11. A methanol engine, characterized in that, Including the intake manifold as described in any one of claims 1 to 10.

12. A vehicle, characterized in that, Including the methanol engine as described in claim 11.

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