Electric injection general gasoline engine silencer

Abstract

The utility model relates to a silencer, in particular to an electronic injection general gasoline engine silencer which comprises a shell, one side of the shell is provided with an installation face for installing an exhaust pipe, and a support used for being fixed to a carrier is arranged on the installation face and on the side, opposite to the exhaust pipe, of the installation face. The support is arranged on one side of the exhaust pipe, the exhaust pipe can be conveniently installed on a carrier, meanwhile, the overall strength of parts is improved, the requirement for the service life of a 1000-hour general gasoline engine is met, and the automobile exhaust pipe further has the advantages of being simple in structure, convenient to machine and high in practicability.

Description

Technical Field

[0001] The utility model relates to a muffler, in particular to a muffler for an electronically injected universal gasoline engine. Background Art

[0002] The mufflers on the market only install the exhaust pipe on the gasoline engine, and there is no other way to fix it. For example, the patent with announcement number CN207813713U and the name of "Gasoline Engine Muffler" is the same. This makes the structure of the muffler unreliable and insufficiently stable. How to improve the structural stability of the muffler is the technical problem we need to solve now. Utility Model Content

[0003] In view of the deficiencies in the existing technology, the utility model provides a muffler for an electronically injected universal gasoline engine.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a universal gasoline engine muffler for electronic injection, characterized in that it includes a shell, one side of the shell has a mounting surface for mounting the exhaust pipe, and a bracket for fixing on a carrier is provided on the mounting surface and on a side opposite to the exhaust pipe.

[0005] The bracket comprises a connecting portion, an extending portion and a mounting portion in sequence. The connecting portion is fixedly connected to the mounting surface, and the mounting portion is provided with a mounting hole for mounting on the carrier.

[0006] The exhaust pipe forms an axial surface A in the axial direction, and the distance from the center of the mounting hole to the axial surface A is 43 mm.

[0007] The connecting portion is fixedly connected to the mounting surface by welding.

[0008] The exhaust pipe is provided with an air supply pipe which is connected with the exhaust pipe.

[0009] The inner diameter of the air supply pipe is 5 mm.

[0010] The air supply pipe is fixedly connected to the exhaust pipe by welding.

[0011] An inner outer cover which at least partially covers the shell is disposed on the outer side of the shell, and an outer outer cover which at least partially covers the inner outer cover is disposed on the outer side of the inner outer cover, with a gap space between the inner outer cover and the outer outer cover.

[0012] The outer cover has a hollow structure.

[0013] The outer cover is fixedly connected to the shell by screw fastening.

[0014] The beneficial effects of the utility model are as follows: the utility model is provided with a bracket on a common muffler shell and on one side of the exhaust pipe, which is convenient for installation on a carrier, and changes the structural form on the market in which the exhaust pipe is only installed to the cylinder exhaust hole, thereby improving the overall strength of the parts and increasing the connection stability to meet the life of a general gasoline engine of 1000 hours. The utility model also has the characteristics of simple structure and convenient processing, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;

[0016] Figure 2 The structure of the utility model is shown in FIG. Figure 2 ;

[0017] Figure 3 The structure of the utility model is shown in FIG. Figure 3 ;

[0018] Figure 4 It is a structural exploded diagram of the utility model;

[0019] Figure 5 It is a structural schematic diagram of the bracket of the utility model. DETAILED DESCRIPTION

[0020] like Figure 1-Figure 5 As shown, a muffler for an electronically injected universal gasoline engine is characterized in that it includes a shell 100, one side of the shell 100 has a mounting surface 110 for mounting an exhaust pipe 200, and a bracket 300 for fixing on a carrier is provided on the mounting surface 110 and relative to the side of the exhaust pipe 200. A bracket 300 is added on one side of the exhaust pipe 200 to improve the strength of the parts to meet the life of a universal gasoline engine of 1000 hours. The carrier of the present application refers to a cylinder or a cylinder head, which is conveniently installed on the cylinder or the cylinder head through the bracket 300, thereby enhancing the connection stability of the muffler and having strong practicality.

[0021] The bracket 300 includes a connecting portion 310 , an extending portion 320 and a mounting portion 330 in sequence. The connecting portion 310 is fixedly connected to the mounting surface 110 , and a mounting hole 331 for mounting on a carrier is provided on the mounting portion 330 .

[0022] The exhaust pipe 200 forms an axial surface A in the axial direction, and the distance from the center of the mounting hole 331 to the axial surface A is 43 mm. The distance between the exhaust pipe 200 and the mounting hole 331 is set to 43 mm, which improves the passability of the bracket 300. The distance can be referred to in the attached Figure 3 .

[0023] The connection portion 310 is fixedly connected to the mounting surface 110 by welding, and the welding makes the structure more reliable.

[0024] The exhaust pipe 200 is provided with an air supply pipe 210 connected to the exhaust pipe 200. The California market in the United States implements the new emission regulations CARB2024. Small internal combustion engines must comply with the emission requirements of CARB2024. The emission results of CH+NO for engines with a displacement of more than 225cc are reduced from the original 8g to 3g, and the emission endurance life is increased from 250 hours to 1000 hours. The added air supply pipe 210 allows the incoming air and the incompletely burned gas discharged from the cylinder to be secondary burned in the muffler, reducing CH+NO emissions, optimizing the emissions of gasoline engines, and making the emissions comply with the requirements of CARB 2024 regulations.

[0025] The inner diameter of the air supply pipe 210 is 5 mm. Through continuous experiments and improvements, the inner diameter of the air supply pipe 210 is preferably 5 mm, so that the effect of the air supply pipe 210 is more obvious.

[0026] The air supply pipe 210 is fixedly connected to the exhaust pipe 200 by welding, and the welding of the air supply pipe 210 needs to be fully welded to prevent air leakage.

[0027] An inner outer cover 120 is disposed on the outer side of the shell 100 and at least partially covers the shell 100. An outer outer cover 400 is disposed on the outer side of the inner outer cover 120 and at least partially covers the inner outer cover 120. There is a gap space between the inner outer cover 120 and the outer outer cover 400. Adding the outer outer cover 400 effectively reduces the temperature of the muffler surface to avoid burns.

[0028] The outer cover 400 has a hollow structure 410 , and the hollow structure 410 is beneficial to heat dissipation.

[0029] The outer cover 400 is fixedly connected to the housing 100 by screw fastening, and the screw fastening is convenient for assembly and disassembly.

[0030] The above shows and describes the basic principle, main features and advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, simple changes and substitutions by ordinary technicians in this field are within the protection scope of the utility model.

Claims

1. A muffler for a general-purpose gasoline engine with electronic fuel injection, characterized in that: The invention comprises a housing (100), one side of the housing (100) having a mounting surface (110) for mounting an exhaust pipe (200), and a bracket (300) for fixing on a carrier is provided on the mounting surface (110) and on a side opposite to the exhaust pipe (200).

2. The muffler for an electronic fuel injection universal gasoline engine as claimed in claim 1, characterized in that: The bracket (300) comprises a connecting portion (310), an extending portion (320) and a mounting portion (330) in sequence; the connecting portion (310) is fixedly connected to the mounting surface (110); and the mounting portion (330) is provided with a mounting hole (331) for mounting on a carrier.

3. The muffler for an electronic fuel injection universal gasoline engine as claimed in claim 2, characterized in that: The exhaust pipe (200) forms an axial surface A in the axial direction, and the distance from the center of the mounting hole (331) to the axial surface A is 43 mm.

4. The muffler for an electronic fuel injection universal gasoline engine as claimed in claim 2, characterized in that: The connection portion (310) is fixedly connected to the mounting surface (110) by welding.

5. The muffler for an electronic fuel injection universal gasoline engine as claimed in claim 1, characterized in that: The exhaust pipe (200) is provided with an air supply pipe (210) which is in communication with the exhaust pipe (200).

6. The muffler for an electronic fuel injection general gasoline engine as claimed in claim 5, characterized in that: The inner diameter of the air supply pipe (210) is 5 mm.

7. The muffler for an electronic fuel injection general gasoline engine as claimed in claim 5, characterized in that: The air supply pipe (210) is fixedly connected to the exhaust pipe (200) by welding.

8. The electronic fuel injection universal gasoline engine muffler according to any one of claims 1 to 7, characterized in that: An inner outer cover (120) is provided on the outer side of the shell (100) and at least partially covers the shell (100); an outer outer cover (400) is provided on the outer side of the inner outer cover (120) and at least partially covers the inner outer cover (120); and a gap space is provided between the inner outer cover (120) and the outer outer cover (400).

9. The muffler for an electronic fuel injection general gasoline engine as claimed in claim 8, characterized in that: The outer cover (400) has a hollow structure (410).

10. The muffler for an electronic fuel injection general gasoline engine as claimed in claim 8, characterized in that: The outer cover (400) is fixedly connected to the housing (100) by means of screw fastening.

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