Injection-premixed gas internal combustion engine cylinder head and gas internal combustion engine

Abstract

The utility model relates to the technical field of gas engine, concretely relates to injection premixing type gas internal combustion engine cylinder cover and gas internal combustion engine, the cylinder cover includes cylinder cover body, and the cylinder cover body has the air inlet, and the part of air inlet near the in-cylinder is equipped with the guide vane group, the part of air inlet and air inlet pipe connection is the sleeve type structure. The injection premixing type gas internal combustion engine cylinder cover provided by the utility model strengthens the mixing of gas and air through the setting guide vane group, promotes the combustion efficiency of mixed gas in the cylinder, and can also partly prevent possible backfire. Through the sleeve type structure and gas supply pipeline connection, even if backfire occurs, when backfire reaches the part, since gas and air are in the separation state, cannot burn, can cut off backfire, further reduces the harm possibility of backfire.

Description

Technical Field

[0001] This utility model relates to the field of gas engine technology, and more specifically, to a premixed injection gas internal combustion engine cylinder head and a gas internal combustion engine. Background Technology

[0002] Gasoline internal combustion engines typically mix gasoline and air before the mixture enters the cylinder. Gasoline engines, on the other hand, mostly follow the same method, using an external mixer to mix the gas and air in a specific ratio before introducing the mixture into the cylinder.

[0003] Because a large amount of mixed gas remains in the mixer and intake manifold, backfire is easily caused. To address this, some gas turbine engines inject combustion gases and air directly into the cylinders separately, preventing air from mixing outside the cylinders and completely avoiding the potential hazards of backfire. However, this direct injection intake method results in uneven distribution of combustible gases in the in-cylinder mixture, reducing combustion efficiency and consequently affecting engine power. Utility Model Content

[0004] The main purpose of this invention is to provide a premixed fuel injection cylinder head for internal combustion engines that reduces the risk of backfire while ensuring combustion efficiency.

[0005] The improvement of this invention is to add a blade assembly to the cylinder inlet of the existing premixed air intake system. This blade assembly serves to guide and mix the airflow in the forward direction and partially block the airflow in the reverse direction. On the one hand, the blade assembly partially prevents possible backfire from entering the mixer pipe; on the other hand, it enhances the mixing of the fuel gas and air by guiding the mixing blades, thereby improving the combustion efficiency of the mixture in the cylinder.

[0006] As a further improvement, this invention changes the connection between the air inlet and the air intake pipe to a sleeve-type structure, that is, this part consists of an inner circular cavity and an outer annular cavity fitted onto the outer wall of the circular cavity. The inner circular cavity is connected to the gas supply pipe, and the outer annular cavity is connected to the air supply pipe. In this way, even if backfire occurs, when the backfire reaches this part, because the gas and air are in a separated state, they cannot burn, thus cutting off the backfire.

[0007] The specific plan is as follows.

[0008] The first aspect of this utility model provides a cylinder head for a premixed fuel injection internal combustion engine, including a cylinder head body, the cylinder head body having an air inlet, and a guide vane assembly provided in the portion of the air inlet near the cylinder; the portion of the air inlet connected to the air intake pipe has a sleeve-type structure.

[0009] In a further improvement, the guide vane group has no fewer than three blades, and the direction of the blade surface is inclined in the direction of the airflow.

[0010] In a further improvement, the blades are fixed to the inner wall of the air inlet.

[0011] In a further improvement, the blade is fixed to the inner wall of a sleeve, and the outer wall of the sleeve is fixed to the inner wall of the air inlet.

[0012] In a further improvement, the sleeve structure includes an inner circular cavity, and an outer annular cavity is sleeved around the inner circular cavity.

[0013] In a further improvement, the outer wall of the outer annular cavity is fixedly connected to the inner wall of the air inlet.

[0014] In a further improvement, the outer wall of the outer annular cavity is embedded and fixed to the inner wall of the air inlet.

[0015] In a further improvement, the outer wall of the outer annular cavity and the inner wall of the air inlet are the same component. That is, the outer wall of the outer annular cavity borrows the inner wall of the air inlet.

[0016] The second aspect of this utility model provides a gas internal combustion engine, including the above-mentioned injection premixed gas internal combustion engine cylinder head.

[0017] The application of the technical solution of this utility model has the following technical effects:

[0018] (1) By setting up a guide vane group, the mixing of gas and air is enhanced, the combustion efficiency of the gas mixture in the cylinder is improved, and possible backfire can be partially prevented.

[0019] (2) By connecting to the gas supply pipeline through a sleeve structure, even if backfire occurs, when the backfire reaches this part, the gas and air are in a separated state and cannot burn, which can cut off the backfire and further reduce the possibility of backfire hazards. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 The basic structural design of the cylinder head of a premixed fuel injection internal combustion engine is shown.

[0022] Figure 2 A schematic diagram of the guide vane assembly and the sleeve structure is shown in detail.

[0023] The above figures include the following reference numerals:

[0024] 1. Cylinder head body;

[0025] 2. Air intake;

[0026] 3. Blade assembly;

[0027] 31. Leaf blade;

[0028] 32. Sleeve; This sleeve is for mounting blades.

[0029] 4. Sleeve-type structure;

[0030] 41. Inner circular cavity;

[0031] 42. Outer annular lumen;

[0032] 43. Outer wall of the cavity; the outer wall of the cavity is the outer wall of the outer annular cavity. Detailed Implementation

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0035] Example 1

[0036] The first embodiment of this utility model provides an overall structure for a premixed fuel injection internal combustion engine cylinder head, as shown below. Figure 1 As shown, the cylinder head of the premixed fuel injection internal combustion engine includes a cylinder head body 1, which has an air inlet 2. A guide vane assembly 3 is provided near the cylinder interior of the air inlet 2. The portion of the air inlet connected to the intake pipe is a sleeve-type structure 4. The guide vane assembly has at least three blades, and the blade surfaces are inclined in the direction of the airflow. The sleeve-type structure 4 includes an inner circular cavity 41, and an outer annular cavity 42 is fitted around the inner circular cavity 41. The inner circular cavity 41 is connected to the fuel supply pipeline, and the outer annular cavity 42 is connected to the air supply pipeline.

[0037] The function of the guide vane assembly is to enhance the mixing of fuel gas and air by guiding the mixing vanes, thereby improving the combustion efficiency of the mixture in the cylinder and partially preventing backfire. It achieves this backfire prevention function because the guide vane assembly is tilted in the direction of the airflow; a counter-flow direction would increase resistance, delaying the spread of backfire. Furthermore, the guide vane assembly can separate backfire, which helps to extinguish it.

[0038] Due to the sleeve-type structure 4, even if backfire occurs, when the backfire reaches that part, the gas and air are separated and cannot burn, thus cutting off the backfire and further reducing the possibility of backfire hazards.

[0039] The following is for reference. Figure 2 This section further describes the specific structure of the cylinder head of the premixed fuel injection internal combustion engine.

[0040] The blades 31 of the guide vane assembly 3 can be directly fixed to the inner wall of the air inlet 2, or the blades 31 can be first fixed to the inner wall of a sleeve 32, and then the inner wall of the sleeve 32 can be fixed to the inner wall of the air inlet 2. The second method is beneficial for the modular disassembly and replacement of the blade assembly 3. Figure 2 The structure shown in the image.

[0041] Continue to refer to Figure 2 The inner circular cavity 41 of the sleeve-type structure 4 is fitted with an outer annular cavity 42. The outer wall of the outer annular cavity 42 and the inner wall of the air inlet can be the same component, that is, the outer wall of the outer annular cavity borrows the inner wall of the air inlet; alternatively, the outer wall 43 of the outer annular cavity can be independently set and fixedly connected to the inner wall of the air inlet, preferably an embedded fixed connection. The support component of the outer annular cavity 42 is not shown in the figure. The inner circular cavity 41 can be directly connected to the gas pipeline; the outer annular cavity 42 needs to be connected to the air supply pipeline through an end cap with a side outlet.

[0042] Example 2

[0043] The second embodiment of this utility model provides a gas internal combustion engine, characterized in that it includes the injection premixed gas internal combustion engine cylinder head of embodiment 1.

[0044] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cylinder head for a premixed fuel injection internal combustion engine, comprising a cylinder head body having an air inlet, characterized in that, The portion of the air intake near the cylinder is equipped with a set of guide vanes. The part connecting the air inlet to the air inlet pipe has a sleeve-type structure.

2. The premixed fuel injection cylinder head of an internal combustion engine as described in claim 1, characterized in that, The guide vane group has no fewer than three blades, and the direction of the blade surface is inclined in the direction of airflow.

3. The premixed fuel injection internal combustion engine cylinder head as described in claim 2, characterized in that, The blade is fixed to the inner wall of the air inlet.

4. The premixed fuel injection internal combustion engine cylinder head as described in claim 2, characterized in that, The blade is fixed to the inner wall of a sleeve, and the outer wall of the sleeve is fixed to the inner wall of the air inlet.

5. The premixed fuel injection internal combustion engine cylinder head as described in claim 1, characterized in that, The sleeve-type structure includes an inner circular cavity, and an outer annular cavity is sleeved around the inner circular cavity.

6. The cylinder head of the premixed fuel injection internal combustion engine as described in claim 5, characterized in that, The outer wall of the outer annular cavity is fixedly connected to the inner wall of the air inlet.

7. The premixed fuel injection internal combustion engine cylinder head as described in claim 6, characterized in that, The outer wall of the outer annular cavity is embedded and fixed to the inner wall of the air inlet.

8. The cylinder head of the premixed fuel injection internal combustion engine as described in claim 5, characterized in that, The outer wall of the outer annular cavity and the inner wall of the air inlet are the same component.

9. A gas-fired internal combustion engine, characterized in that, Including the premixed fuel injection cylinder head as described in any one of claims 1-8.

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