Methanol engine and methanol intake system
By using a cylinder liner water circulation system to heat methanol and air in the intake manifold of a methanol engine, the problem of poor methanol vaporization at low temperatures is solved, thereby improving the engine's combustion efficiency and service life, and reducing the risk of erosion.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZICHAI POWER CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-23
AI Technical Summary
Existing methanol engines have poor methanol vaporization performance in low-temperature environments, resulting in reduced engine power, increased power consumption, and easy accumulation of liquid methanol leading to erosion problems and shortening engine life.
High-temperature water from the cylinder liner water circulation system is used to heat methanol and air in the intake manifold, thereby improving the vaporization efficiency of methanol. Fins are installed in the intake manifold using the cylinder liner water inlet and return pipes to enhance the heat exchange effect. Water flow is adjusted using a temperature sensor and a flow control valve.
It improves the vaporization efficiency of methanol, reduces the risk of liquid methanol entering the cylinder, enhances engine combustion efficiency and output power, reduces erosion, extends engine life, and improves adaptability to low-temperature environments.
Smart Images
Figure CN224396597U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of engine technology, and more specifically, to a methanol intake system. Furthermore, this utility model also provides a methanol engine including a methanol intake system. Background Technology
[0002] For methanol engines, the atomization quality and vaporization effect of methanol before it enters the cylinder directly affect the engine's combustion efficiency and reliability.
[0003] In the existing technology, methanol enters the cylinder head intake port directly through the intake manifold. Because methanol has a large latent heat of vaporization, it is difficult for methanol to completely vaporize when the ambient temperature is low. The unvaporized liquid methanol will not burn completely in the cylinder, which will reduce engine power and increase engine power consumption. At the same time, liquid methanol is prone to accumulate on the surface of valves, pistons and other components, leading to erosion problems and shortening the engine's service life.
[0004] In conclusion, how to improve the vaporization effect of methanol under low-temperature conditions is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0005] In view of this, the purpose of this utility model is to provide a methanol intake system that uses high-temperature water in the cylinder liner water circulation system to heat methanol and air, thereby improving the vaporization efficiency and vaporization effect of methanol, effectively reducing erosion, extending engine service life, and improving the engine's adaptability to low-temperature environments.
[0006] In addition, this utility model also provides a methanol engine including the above-mentioned methanol intake system.
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] A methanol intake system includes an intake manifold, which has a methanol injection inlet, an air inlet, and a cylinder air inlet. It also includes a cylinder liner water inlet pipe and a cylinder liner water return pipe, which are inserted into the intake manifold to heat the methanol and air within it. One end of the cylinder liner water inlet pipe is connected to the high-temperature water outlet of a cylinder liner water circulation system, and the other end is connected to the cylinder liner water return pipe. The other end of the cylinder liner water return pipe is connected to the low-temperature water inlet of the cylinder liner water circulation system.
[0009] Preferably, both the cylinder liner water inlet pipe and the cylinder liner water return pipe extend along the axial direction of the intake manifold.
[0010] Preferably, fins are provided between the cylinder liner water inlet pipe and the cylinder liner water return pipe, and the fins are vertically arranged between the cylinder liner water inlet pipe and the cylinder liner water return pipe.
[0011] Preferably, the fins are evenly arranged between the cylinder liner water inlet pipe and the cylinder liner water return pipe, along the extension direction of the intake manifold.
[0012] Preferably, the methanol injection inlets are evenly distributed along the extension direction of the main intake pipe.
[0013] Preferably, it also includes a cylinder liner water cover plate, which is detachably connected to the intake manifold. The cylinder liner water cover plate is provided with a water inlet and a return pipe. The cylinder liner water inlet pipe is sealed and installed in the water inlet, and the cylinder liner water return pipe is sealed and installed in the return pipe.
[0014] Preferably, a first sealing element is provided between the water inlet and the cylinder liner water inlet seal, and a second sealing element is provided between the return pipe and the cylinder liner water return pipe.
[0015] Preferably, a sealing ring is provided between the cylinder liner water cover plate and the end face of the intake manifold, and a sealing groove for installing the sealing ring is provided on the inner surface of the cylinder liner water cover plate.
[0016] Preferably, the cylinder liner water inlet pipe is equipped with a flow control valve, and the air inlet is equipped with a temperature sensor for monitoring the real-time intake air temperature. The temperature sensor is signal-connected to the flow control valve so as to adjust the unit flow rate of the flow control valve according to the real-time intake air temperature.
[0017] A methanol engine, comprising the methanol intake system described in any of the preceding claims.
[0018] The methanol intake system provided by this utility model is equipped with a cylinder liner water inlet pipe and a cylinder liner water return pipe connected to the cylinder liner water circulation system. The high-temperature water in the cylinder liner water circulation system is used to heat methanol and air, which improves the vaporization efficiency of methanol, reduces the risk of liquid methanol entering the cylinder, thereby improving the engine combustion efficiency and output power, effectively reducing erosion, extending engine service life, and improving the engine's adaptability to low-temperature environments.
[0019] In addition, the engine's existing cylinder liner water circulation system is used to heat the methanol intake system, eliminating the need for additional heating devices and effectively reducing manufacturing costs and system complexity.
[0020] In addition, this utility model also provides a methanol engine including the above-mentioned methanol intake system. Attached Figure Description
[0021] 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0022] Figure 1 This is a front view schematic diagram of a specific embodiment of the methanol intake system provided by this utility model;
[0023] Figure 2 This is a side view of the methanol intake system.
[0024] Figure 3 This is a schematic diagram of the cylinder liner water heating assembly.
[0025] Figures 1-3 middle:
[0026] 1-Intake manifold; 2-Methanol injection inlet; 3-Intake port; 4-Cylinder intake port; 5-Cylinder liner water heating assembly; 51-Cylinder liner water inlet pipe; 52-Cylinder liner water return pipe; 53-Fin; 54-Cylinder liner water cover plate. Detailed Implementation
[0027] 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 protection scope of the present utility model.
[0028] The core of this invention is to provide a methanol intake system that uses high-temperature water in the cylinder liner water circulation system to heat methanol and air, thereby improving the vaporization efficiency and effect of methanol, effectively reducing erosion, extending engine service life, and improving the engine's adaptability to low-temperature environments.
[0029] In addition, this utility model also provides a methanol engine including the above-mentioned methanol intake system.
[0030] The methanol intake system provided by this utility model includes an intake manifold 1, which is provided with a methanol injection inlet 2, an air inlet 3 and a cylinder air inlet 4. It also includes a cylinder liner water inlet pipe 51 and a cylinder liner water return pipe 52. The cylinder liner water inlet pipe 51 and the cylinder liner water return pipe 52 are inserted into the intake manifold 1 to heat the methanol and air in the intake manifold 1. One end of the cylinder liner water inlet pipe 51 is connected to the high-temperature water outlet of the cylinder liner water circulation system, and the other end of the cylinder liner water inlet pipe 51 is connected to the cylinder liner water return pipe. The other end of the cylinder liner water return pipe 52 is connected to the low-temperature water inlet of the cylinder liner water circulation system.
[0031] The intake manifold 1 is equipped with a methanol injection inlet 2, an air inlet 3, and a cylinder air inlet 4. The methanol injection inlet 2 is equipped with a methanol nozzle for injecting atomized methanol into the intake manifold 1. To ensure a relatively uniform methanol concentration distribution in the intake manifold 1, it is preferable that the methanol injection inlet 2 is evenly distributed along the extension direction of the intake manifold 1. The air inlet 3 is used to introduce external air into the intake manifold 1. The cylinder air inlet 4 is used to input the mixture formed by vaporized methanol and air into the cylinder.
[0032] The specific quantity, structure, and size of the methanol injection inlet 2 are determined based on the maximum design power of the methanol engine and the atomization quality requirements of methanol in actual production. The specific structure and size of the air inlet 3 and the cylinder air inlet 4 are determined based on the design parameters such as the maximum air intake of the methanol engine in actual production.
[0033] The cylinder liner water inlet pipe 51 is connected to the high-temperature water outlet of the cylinder liner water circulation system. After the high-temperature water in the cylinder liner water circulation system enters the intake manifold 1, it heats the air in the intake manifold 1. By increasing the temperature inside the intake manifold 1, methanol is rapidly vaporized, thereby improving the vaporization efficiency and effect of methanol. This is beneficial for improving the methanol vaporization effect of the methanol engine, especially the methanol vaporization effect under low-temperature conditions.
[0034] After the high-temperature water in the cylinder liner water inlet pipe 51 heats the air in the intake manifold 1, it becomes low-temperature water. The low-temperature water flows back to the cylinder liner water circulation system through the low-temperature water inlet pipe 52.
[0035] The number and cross-sectional area of the cylinder liner water inlet pipe 51 will affect the flow rate of the cylinder liner water heating component 5, thereby affecting the unit heat production of the cylinder liner water heating component 5, and thus affecting the vaporization efficiency and vaporization effect of methanol.
[0036] The number of cylinder liner water inlet pipes 51 can be one, two or even more, but the more cylinder liner water inlet pipes 51 there are, the more complex the structure of the intake manifold, the higher the manufacturing cost of the methanol water inlet system, and the higher the system complexity, failure rate and maintenance cost.
[0037] Please refer to Figure 1and Figure 2 The methanol injection inlet 2 and cylinder air inlet 4 of the intake manifold 1 are usually located on the outer periphery of the intake manifold 1. Preferably, in order to avoid interference between the cylinder liner water heating assembly 5 and the methanol injection inlet 2 or the cylinder air inlet 4, the cylinder liner water inlet pipe 51 and the cylinder liner water return pipe 52 can both be arranged to extend along the axial direction of the intake manifold 1.
[0038] Meanwhile, arranging the cylinder liner water heating assembly 5 axially, compared to arranging it radially, helps to increase the length of the cylinder liner water inlet pipe 51, increase the contact range and heat exchange between the cylinder liner water inlet pipe 51 and the air in the intake manifold 1, thereby improving the vaporization effect of methanol. Therefore, under the same heat exchange conditions, the cylinder liner water heating assembly 5 axially requires fewer pipes than radially, which helps to reduce the manufacturing and maintenance costs of the methanol water inlet system.
[0039] To ensure the airtightness of the intake manifold 1, both the cylinder liner water inlet pipe 51 and the cylinder liner water return pipe 52 are equipped with sealing structures at their connections to the intake manifold 1. Specifically, the cylinder liner water inlet pipe 51 or the cylinder liner water return pipe 52 can be threadedly connected to the intake manifold 1, or a sealing ring can be provided at the connection.
[0040] In this embodiment, the methanol intake system is provided with a cylinder liner water inlet pipe 51 and a cylinder liner water return pipe 52 connected to the cylinder liner water circulation system. The high-temperature water in the cylinder liner water circulation system is used to heat the methanol and air, which improves the vaporization efficiency of methanol, reduces the risk of liquid methanol entering the cylinder, thereby improving the engine combustion efficiency and output power, effectively reducing the burning phenomenon, extending the engine service life, and improving the engine's adaptability to low-temperature environments.
[0041] In addition, the engine's existing cylinder liner water circulation system is used to heat the methanol intake system, eliminating the need for additional heating devices and effectively reducing manufacturing costs and system complexity.
[0042] Preferably, in order to increase the contact area between the cylinder liner water heating assembly 5 and the air inside the intake manifold 1 and improve the heat exchange efficiency, fins 53 can be provided between the cylinder liner water inlet pipe 51 and the cylinder liner water return pipe 52. The fins 53 are vertically arranged between the cylinder liner water inlet pipe 51 and the cylinder liner water return pipe 52, such as... Figure 3 As shown.
[0043] The specific type and quantity of fins 53 are determined based on factors such as the length of the cylinder liner water inlet pipe 51 and the axial spacing between the cylinder liner water inlet pipe 51 and the cylinder liner water return pipe 52 in actual production, and will not be elaborated here.
[0044] In order to make the heat dissipation of the cylinder liner water heating assembly 5 relatively uniform, it is preferable to set the fins 53 evenly between the cylinder liner water inlet pipe 51 and the cylinder liner water return pipe 52, along the extension direction of the intake manifold 1.
[0045] Regarding the installation positions of the cylinder liner water inlet pipe 51 and the cylinder liner water return pipe 52 on the intake manifold 1, they can be installed at the same end of the intake manifold 1, or they can be installed at opposite ends of the intake manifold 1. However, if the cylinder liner water inlet pipe 51 and the cylinder liner water return pipe 52 are installed on the same side, only the end cap structure of one end of the existing methanol engine intake manifold 1 needs to be adjusted, resulting in lower manufacturing costs.
[0046] Preferably, in order to facilitate the overall maintenance of the cylinder liner water heating assembly 5, a cylinder liner water cover plate 54 may also be provided. The cylinder liner water cover plate 54 is detachably connected to the intake manifold 1. The connection between the two can be set as bolt connection, pin connection, threaded connection, etc. The cylinder liner water cover plate 54 is provided with a water inlet and a return pipe. The cylinder liner water inlet pipe 51 is sealed and installed in the water inlet, and the cylinder liner water return pipe 52 is sealed and installed in the return pipe.
[0047] In this embodiment, both the cylinder liner water inlet pipe 51 and the cylinder liner water return pipe 52 are connected to the intake manifold 1 through the cylinder liner water cover plate 54. Therefore, by disconnecting the connection between the cylinder liner water cover plate 54 and the intake manifold 1, the entire cylinder liner water heating assembly 5 can be removed for inspection or maintenance, resulting in better maintenance performance.
[0048] Preferably, in order to ensure the sealing between the cylinder liner water cover plate 54 and the cylinder liner water inlet pipe 51 and the cylinder liner water return pipe 52, a first sealing element is provided between the inlet pipe port and the cylinder liner water inlet pipe 51, and a second sealing element is provided between the return pipe port and the cylinder liner water return pipe 52; the first sealing element and the second sealing element can be specifically set as fluororubber sealing gaskets, hydrogenated nitrile rubber sealing rings, etc.
[0049] Preferably, in order to ensure the sealing between the cylinder liner water cover plate 54 and the intake manifold 1, a sealing ring is provided between the end faces of the cylinder liner water cover plate 54 and the intake manifold 1, and a sealing groove for installing the sealing ring is provided on the inner surface of the cylinder liner water cover plate.
[0050] Based on the above embodiments, the cylinder liner water inlet pipe 51 can be equipped with a flow control valve, and the air inlet 3 can be equipped with a temperature sensor for monitoring the real-time intake air temperature. The temperature sensor is connected to the flow control valve so as to adjust the unit flow of the flow control valve according to the real-time intake air temperature.
[0051] In this embodiment, the real-time intake temperature of the intake manifold 1 is detected by a temperature sensor, and the high-temperature water flow rate of the cylinder liner water inlet pipe 51 is adjusted by a flow control valve accordingly, thereby adjusting the temperature of the mixed air in the intake manifold 1. In high-temperature environments, the high-temperature water flow rate of the cylinder liner water inlet pipe 51 is reduced, or even completely shut off. In low-temperature environments, the high-temperature water flow rate of the cylinder liner water inlet pipe 51 is increased, so that the methanol intake system can meet the working conditions under different temperature environments and ensure stable methanol vaporization effect.
[0052] In addition to the methanol intake system described above, this utility model also provides a methanol engine that includes the methanol intake system disclosed in the above embodiments. For the structure of other parts of the methanol engine, please refer to the prior art, which will not be described in detail here.
[0053] It should be noted that the first and second seals mentioned in this application are only used to distinguish the different positions and do not limit the order.
[0054] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0055] The methanol engine and methanol intake system provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.
Claims
1. A methanol intake system, comprising an intake manifold (1), wherein the intake manifold (1) is provided with a methanol injection inlet (2), an intake port (3), and a cylinder intake port (4), characterized in that, It also includes a cylinder liner water inlet pipe (51) and a cylinder liner water return pipe (52). The cylinder liner water inlet pipe (51) and the cylinder liner water return pipe (52) are inserted into the intake manifold (1) to heat the methanol and air in the intake manifold (1). One end of the cylinder liner water inlet pipe (51) is connected to the high-temperature water outlet of the cylinder liner water circulation system, and the other end of the cylinder liner water inlet pipe (51) is connected to the cylinder liner water return pipe (52). The other end of the cylinder liner water return pipe (52) is connected to the low-temperature water inlet of the cylinder liner water circulation system.
2. The methanol intake system according to claim 1, characterized in that, Both the cylinder liner water inlet pipe (51) and the cylinder liner water return pipe (52) extend along the axial direction of the intake manifold (1).
3. The methanol intake system according to claim 1, characterized in that, A fin (53) is provided between the cylinder liner water inlet pipe (51) and the cylinder liner water return pipe (52), and the fin (53) is vertically arranged between the cylinder liner water inlet pipe (51) and the cylinder liner water return pipe (52).
4. The methanol intake system according to claim 3, characterized in that, The fins (53) are evenly arranged between the cylinder liner water inlet pipe (51) and the cylinder liner water return pipe (52) along the extension direction of the intake manifold (1).
5. The methanol intake system according to claim 1, characterized in that, The methanol injection inlet (2) is evenly distributed along the extension direction of the main intake pipe (1).
6. The methanol intake system according to any one of claims 1-5, characterized in that, It also includes a cylinder liner water cover plate (54), which is detachably connected to the intake manifold (1). The cylinder liner water cover plate (54) is provided with a water inlet and a return pipe. The cylinder liner water inlet pipe (51) is sealed and installed in the water inlet, and the cylinder liner water return pipe (52) is sealed and installed in the return pipe.
7. The methanol intake system according to claim 6, characterized in that, A first sealing element is provided between the water inlet and the cylinder liner water inlet pipe (51), and a second sealing element is provided between the return pipe and the cylinder liner water return pipe (52).
8. The methanol intake system according to claim 6, characterized in that, A sealing ring is provided between the cylinder liner water cover plate (54) and the end face of the intake manifold (1), and a sealing groove for installing the sealing ring is provided on the inner surface of the cylinder liner water cover plate (54).
9. The methanol intake system according to any one of claims 1-5, characterized in that, The cylinder liner water inlet pipe (51) is equipped with a flow control valve, and the air inlet (3) is equipped with a temperature sensor for monitoring the real-time air intake temperature. The temperature sensor is connected to the flow control valve so as to adjust the unit flow of the flow control valve according to the real-time air intake temperature.
10. A methanol engine, characterized in that, Includes the methanol intake system according to any one of claims 1-9.