Intake manifold assembly for methanol engine

Abstract

The utility model discloses an intake manifold assembly for a methanol engine, which comprises an intake manifold body, a heating device for heating gas in a pipe is arranged at the intake end of the intake manifold body, and a humidifying device for increasing the humidity of the gas in the pipe is integrated on the intake manifold body; according to the air inlet manifold assembly for the methanol engine, the air heater and the humidifier are integrated on the key part of the air inlet manifold, so that the problems of insufficient vaporization, inappropriate humidity and the like of methanol in the air inlet and combustion processes are effectively solved, the combustion efficiency and the power performance of the methanol fuel engine are improved, and the energy consumption is reduced. And the air inlet heater and the humidifier are integrated on the air inlet manifold, so that compared with the conventional mode of dispersedly arranging related equipment, the space of an engine compartment is saved, complicated pipeline connection and the like are reduced, the overall structure is more compact, and the installation and the maintenance are more convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile engine, and relates to an air intake manifold assembly for methanol engine. BACKGROUND

[0002] With the deepening exploration of clean energy and diversified fuel utilization, methanol as a fuel alternative to traditional gasoline has attracted attention due to its wide sources and relatively clean combustion. However, methanol has some characteristics that make it face challenges in engine intake and combustion. For example, methanol has a large latent heat of vaporization and is not easy to vaporize quickly in low temperature environment. If it cannot be fully vaporized before entering the cylinder, it will affect the combustion efficiency, leading to insufficient power, increased fuel consumption, and poor emissions (formation of formic acid). At the same time, the methanol combustion process has certain requirements for air humidity, and appropriate humidity helps it burn more fully and stably, improving overall combustion performance.

[0003] Currently, to solve the vaporization and humidity related problems of methanol fuel in engine intake and combustion, dispersed and individually acting devices are often used for improvement. For example, a methanol vaporization auxiliary device may be separately arranged at a certain position of the intake system, and another device for adjusting air humidity is separately provided and installed elsewhere. These devices are independent of each other and do not form an organic whole.

[0004] Therefore, it is necessary to integrate these functional components that are conducive to methanol combustion together to work synergistically and thus more efficiently solve the various problems faced by methanol combustion. SUMMARY

[0005] Therefore, the utility model provides an air intake manifold assembly for methanol engine, which effectively solves the problems of insufficient vaporization and inappropriate humidity in the intake and combustion process of methanol, improves the combustion efficiency and power performance of methanol fuel engine, and reduces harmful emissions.

[0006] The utility model discloses an air intake manifold assembly for methanol engine, which comprises an air intake manifold body, a heating device for heating the gas in the pipe is arranged at the air inlet end of the air intake manifold body, and a humidifying device for increasing the humidity of the gas in the pipe is also integrated on the air intake manifold body.

[0007] Further, the humidifying device comprises a water storage box integrated on the air intake manifold body, and the water inlet end of the water storage box is used for communicating with the cooling water path.

[0008] Further, the humidifying device further comprises an atomizing nozzle arranged on the intake manifold body and extending into the pipe, and a connecting pipe for connecting the water storage box and the atomizing nozzle, the connecting pipe being fixedly connected with the water outlet end of the water storage box.

[0009] Further, the humidifying device further comprises a humidity sensor integrated on the intake manifold body for monitoring the humidity of the gas in the pipe.

[0010] Further, the water storage box is provided with a filtering device for filtering the cooling water, the filtering device comprising a filter screen and a filter core.

[0011] Further, the heating device comprises a heater arranged at the air inlet end of the intake manifold body, and a temperature sensor integrated on the intake manifold body for monitoring the temperature of the gas in the pipe.

[0012] Further, the heater comprises a heating element arranged around the inner wall of the pipe at the air inlet end of the intake manifold body.

[0013] Further, the intake manifold body comprises an air inlet main pipe and an air inlet branch pipe arranged on the air inlet main pipe, the air inlet main pipe and the air inlet branch pipe being integrally formed.

[0014] Further, a control unit is arranged on the methanol engine, the control unit being electrically connected with the heating device and the humidifying device respectively.

[0015] The utility model discloses beneficial effects are as follows:

[0016] The utility model provides a kind of intake manifold assembly for methanol engine, by integrating air heater and humidifier in this critical position of intake manifold, effectively solve the problems such as vaporization insufficient and humidity unsuitable that methanol faces in the process of admission and combustion, improve the combustion efficiency, power performance of methanol fuel engine, and reduce harmful emissions, integrate air heater and humidifier on intake manifold, compared with the way of the related equipment of the past scattered arrangement, save the space of engine cabin, reduce complex pipe connection etc., overall structure is more compact, installation and maintenance are also more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the isometric view of the utility model;

[0018] Figure 2 It is the front view of the utility model;

[0019] Figure 3 It is Figure 2 the enlarged view of A of the utility model;

[0020] Signs: intake main pipe 1, intake branch pipe 2, water storage box 3, filter element 4, filter screen 5, atomizing nozzle 6, connecting pipe 7, heater 8, temperature sensor 9, humidity sensor 10, cover plate 11, screw 12, heating element 13. DETAILED DESCRIPTION

[0021] It should be noted that in the description of the present application, the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the present embodiment, up, down, left, right, front, back are all with reference to the drawings Figure 2 Outwardly refers to the direction away from the bracket itself, and inwardly is the opposite.

[0022] As shown in the drawings, the embodiment of the present application discloses an intake manifold assembly for a methanol engine, comprising an intake manifold body, the intake manifold body is provided with a heating device for heating the gas in the pipe at the intake end, and the intake manifold body is also integrated with a humidifying device for increasing the humidity of the gas in the pipe; The intake manifold body refers to the intake pipeline from the carburetor or throttle body to the intake port of the cylinder head, which is mainly used for conveying methanol gas to the gas rail connected to the intake port of the cylinder head or directly connected to the intake port of the cylinder head in the present scheme. However, due to the particularity of methanol gas as fuel, the vaporization and humidity related problems need to be considered when burning in the cylinder, so it is necessary to integrate the heating device and the humidifying device on the intake manifold body, wherein the heating device is an air heater 8 and the like, which is mainly used for heating the methanol gas entering the intake manifold body to facilitate the vaporization of the methanol gas. The humidifying device is mainly used for increasing the humidity of the methanol gas entering the intake manifold body, so that the methanol gas is in the best humidity state for combustion. By integrating the heating device and the humidifying device in the key part of the intake manifold body, the problems of insufficient vaporization and unsuitable humidity of methanol during intake and combustion are effectively solved, the combustion efficiency and power performance of the methanol fuel engine are improved, and harmful emissions are reduced. The intake heater 8 and the humidifier are integrated on the intake manifold, compared with the previous way of dispersing related equipment, the space of the engine compartment is saved, the complex pipeline connection is reduced, the overall structure is more compact, and the installation and maintenance are more convenient.

[0023] In the present embodiment, the humidifying device comprises a water storage box 3 integrated on the intake manifold body, a water inlet end of the water storage box 3 is used for communicating with a cooling water circuit; in combination with Figure 1As shown, the intake manifold body is provided with a water storage box 3 for storing humidification water, and the water inlet of the water storage box 3 is communicated with the cooling water path to facilitate the full use of the cooling water. Specifically, a branch path is provided on the cooling water path and communicated with the water storage box 3, and an electromagnetic valve is correspondingly provided on the branch path to open and close the branch path. When the water storage box 3 is provided with a water level monitor for detecting the volume of humidification water, and the volume of humidification water in the water storage box 3 is too low, the electromagnetic valve on the branch path is opened to provide humidification water for the water storage box 3. When the humidification water in the water storage box 3 reaches a predetermined water level, the electromagnetic valve is closed.

[0024] In this embodiment, the humidification device further comprises an atomizing nozzle 6 arranged on the intake manifold body and extending into the pipe, and a connecting pipe 7 for connecting the water storage box 3 and the atomizing nozzle 6, wherein the connecting pipe 7 is connected and fixed with the water outlet of the water storage box 3. The atomizing nozzle 6 is uniformly distributed on the pipe wall inside the intake manifold body, which can atomize the water into fine droplets and spray them into the intake air flow to provide a suitable humidity environment for the methanol gas. The connecting pipe 7 is mainly used to connect the atomizing nozzle 6 and the water storage box 3 to transport the humidification water in the water storage box 3 to the atomizing nozzle 6. The arrangement position of the atomizing nozzle 6 on the intake manifold body can be determined according to the process optimization analysis in the previous design process to determine the best atomizing position. The atomizing nozzle 6 is also provided with a humidity adjustment controller for controlling the water spraying amount, which is a prior art and will not be described here. The connecting pipe 7 is a conventional rubber water pipe.

[0025] In this embodiment, the humidification device further comprises a humidity sensor 10 integrated on the intake manifold body for monitoring the humidity of the gas in the pipe. The humidity adjustment controller cooperates with the humidity sensor 10 arranged in the intake manifold to detect the intake humidity in real time, controls the water spraying amount of the atomizing nozzle 6 according to the best humidity range required by the methanol gas combustion (to make the relative humidity of the intake air reach 30%-60%), and realizes the precise adjustment of the intake humidity.

[0026] In this embodiment, the water storage box 3 is provided with a filtering device for filtering the cooling water, which comprises a filter screen 5 and a filter core 4. By arranging the filtering device in the water storage box 3, the cooling water flowing into the water storage box 3 from the cooling water path is filtered to become humidification water, which avoids that too many impurities in the cooling water block the connecting pipe 7 and the atomizing nozzle 6, or are sprayed into the inside of the intake manifold body. The filtering device is composed of the filter screen 5 and the filter core 4 to realize multi-layer filtration and ensure that there is no impurity in the humidification water.

[0027] In the embodiment, the heating device comprises a heater 8 arranged at the air intake end of the air intake manifold body and a temperature sensor 9 integrated on the air intake manifold body for monitoring the temperature of the gas in the pipe; wherein the heater 8 is installed at a position near the air inlet at the air intake end of the air intake manifold body, and the heater 8 has a heating temperature controller inside (which is a prior art and will not be described here), the temperature sensor 9 monitors the air intake temperature in real time and feeds back a signal to the heating temperature controller, the heating temperature controller accurately controls the working state of the heater 8 according to the preset optimal air intake temperature range (50-80℃ for cold start, 25-40℃ for normal operation stage), and ensures sufficient combustion of methanol.

[0028] In the embodiment, the heater 8 comprises a heating element 13 arranged around the inner wall of the pipe at the air intake end of the air intake manifold body; wherein the heater 8 further comprises a heating element 13 for heating methanol gas, and the heating element 13 in the scheme can mainly be an electric heating wire with high power and high thermal conductivity, or a heating pipe using engine coolant circulation heat exchange, etc., wherein the heating element 13 is arranged around the pipe wall of the air intake port of the air intake manifold, and can quickly heat the air entering the air intake manifold to promote the air to rise to a suitable temperature.

[0029] In the embodiment, the air intake manifold body comprises an air intake main pipe 1 and an air intake branch pipe 2 arranged on the air intake main pipe 1, and the air intake main pipe 1 and the air intake branch pipe 2 are integrally formed; wherein the air intake main pipe 1 and the air intake branch pipe 2 arranged on the air intake main pipe 1 are integrally formed by using an alloy material with high strength, high temperature resistance and good heat insulation performance, so that the air intake manifold body has a plurality of independent air intake channels inside, which are respectively connected with each cylinder of the engine to ensure uniform distribution of air intake to each cylinder.

[0030] In the embodiment, a control unit arranged on the methanol engine is further included, and the control unit is electrically connected with the heating device and the humidifying device; wherein the control unit is an electronic control unit (ECU) of the vehicle, the heating device and the humidifying device are connected with the electronic control unit (ECU) of the vehicle through a control circuit, and the ECU uniformly coordinates the working of the heating device and the humidifying device according to the operating conditions (such as the speed, load, environmental temperature and other parameters) of the engine, so that the two devices cooperate with each other to provide the most suitable temperature and humidity conditions for the methanol mixed gas entering the cylinder.

[0031] Specific working principle is: in the engine starting and running process, when using methanol as fuel, air first enters the intake manifold body. At this time, the heater 8 according to the temperature sensor 9 feedback air temperature information, under the action of heating temperature controller start heating element 13, heating air, air reaches the appropriate temperature; then, with the methanol gas continues to flow in the intake manifold, humidity adjusting controller of humidifying device according to the real-time humidity detected by humidity sensor 10, control atomizing nozzle 6 to spray the appropriate amount of atomized water to the mixed gas, adjust the air humidity to the range suitable for methanol combustion, after heating and humidifying treatment of methanol gas is finally evenly distributed to each cylinder for efficient combustion.

[0032] Finally, it is pointed out that the above examples are used to illustrate the technical solutions of the present application, not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application. Its should be covered in the scope of the claims of the present application.

Claims

1. An air intake manifold assembly for a methanol engine, characterized by: The application relates to an intake manifold body provided with a heating device for heating gas in the intake manifold body at an intake end, and a humidifying device integrated on the intake manifold body for increasing the humidity of the gas in the intake manifold body.

2. The air intake manifold assembly for a methanol engine according to claim 1, characterized by: The humidifying device comprises a water storage box integrated on the intake manifold body, and a water inlet end of the water storage box is used for communicating with a cooling water channel.

3. The air intake manifold assembly for a methanol engine of claim 2, wherein: The humidifying device further comprises an atomizing nozzle arranged on the intake manifold body and extending into the intake manifold body, and a connecting pipe for connecting the water storage box and the atomizing nozzle, and the connecting pipe is fixedly connected with a water outlet end of the water storage box.

4. The air intake manifold assembly for a methanol engine of claim 3, wherein: The humidifying device further comprises a humidity sensor integrated on the intake manifold body for monitoring the humidity of the gas in the intake manifold body.

5. The air intake manifold assembly for a methanol engine of claim 2, wherein: The water storage box is provided with a filtering device for filtering the cooling water, and the filtering device comprises a filter screen and a filter core.

6. The air intake manifold assembly for a methanol engine of claim 1, wherein: The heating device comprises a heater arranged at the intake end of the intake manifold body, and a temperature sensor integrated on the intake manifold body for monitoring the temperature of the gas in the intake manifold body.

7. The air intake manifold assembly for a methanol engine of claim 6, wherein: The heater comprises a heating element which is arranged around an inner wall of the intake manifold body at the intake end.

8. The air intake manifold assembly for a methanol engine of claim 1, wherein: The intake manifold body comprises an intake main pipe and intake branch pipes arranged on the intake main pipe, and the intake main pipe and the intake branch pipes are integrally formed.

9. The air intake manifold assembly for a methanol engine of claim 1, wherein: A control unit is further arranged on the methanol engine, and the control unit is electrically connected with the heating device and the humidifying device respectively.

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