Cast aluminum air inlet pipe for diesel engine

Abstract

A cast aluminum air inlet pipe for a diesel engine comprises an air inlet pipe body. The air inlet pipe body is made of cast aluminum materials through a process, and an inlet flange used for being connected with an air inlet pipeline is arranged at the air inlet end of the upper portion of the air inlet pipe body. Four outlet flanges, namely a first cylinder outlet flange, a second cylinder outlet flange, a third cylinder outlet flange and a fourth cylinder outlet flange, connected with the air inlet end face of a cylinder cover of the diesel engine are arranged at the air outlet end of the lower part of the air inlet pipe body; a non-metal gasket is arranged at the port of each outlet flange; and the second cylinder outlet flange and the other outlet flanges are arranged in opposite directions. The air inlet pipe is light in weight and high in integration level, the second cylinder outlet flange of the air inlet pipe and the other outlet flanges are arranged in the reverse direction, the inlet flange located between the second cylinder and the third cylinder is simple in trend, internal air inlet is smooth, no abrupt change section exists, the structure is compact, and the space occupied by a diesel engine can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of internal combustion engines, in particular to a cast aluminum intake pipe for a diesel engine. Background Art

[0002] With the continuous upgrading of emission regulations for non-road mobile machinery in China, the agricultural machinery industry has developed more and more rapidly. For diesel engines and their parts, reducing space occupation has become a relatively important competitive advantage. Among them, the basic function of the diesel engine intake pipe is to guide and distribute fresh air into the inlets of each airway of the cylinder head; in the Chinese utility model patent 201420186431.7, a new diesel engine intake pipe is disclosed, wherein the intake pipe body includes an oil inlet pipe fixing surface, an air inlet surface and two end panels, the air inlet surface is an arc surface, and an end panel is welded at both ends of the air inlet surface, and a plurality of oil inlet pipe fixing blocks are arranged on the oil inlet pipe fixing surface, an air inlet is arranged at one end of the oil inlet pipe fixing surface, and a plurality of air outlets are arranged at equal distances on the arc-shaped air inlet surface. The outlet flanges of the diesel engine intake pipe are arranged regularly. When this structure is matched with a diesel engine with a small cylinder center distance and a short cylinder head height, the inlet flange is small, which makes the intake pipe air intake unsmooth, increases the overall space of the diesel engine, and cannot meet the compact requirements of the diesel engine. Utility Model Content

[0003] The utility model aims to provide a cast aluminum intake pipe for a diesel engine, which can better meet the matching requirements of a diesel engine with a small cylinder center distance and has the advantages of good versatility, high integration and light weight.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a cast aluminum intake pipe for a diesel engine, comprising an intake pipe body; the intake pipe body is made of cast aluminum material and process, and an inlet flange for connecting the intake pipeline is provided at the upper intake end of the intake pipe body; the lower outlet end of the intake pipe body is provided with four outlet flanges for connecting to the intake end face of the diesel engine cylinder head, which are the first cylinder outlet flange, the second cylinder outlet flange, the third cylinder outlet flange and the fourth cylinder outlet flange in sequence; each port of the outlet flange is provided with a non-metallic gasket; the second cylinder outlet flange is arranged in reverse to the remaining outlet flanges; the lower part of the intake pipe body is provided with a common rail pipe and a first fixing hole for installing the common rail pipe and a second fixing hole for installing a temperature and pressure sensor in sequence.

[0005] A plurality of high-pressure oil pipes are evenly arranged on the common rail pipe; evenly distributed fuel injectors are connected to the ends of the high-pressure oil pipes; and the positions of the high-pressure oil pipes and the fuel injectors are relatively fixed and compact.

[0006] Three first fixing holes are arranged along the same direction, and the first fixing holes are arranged vertically and away from the air intake pipe body.

[0007] Four evenly distributed threaded holes are also arranged at the four corners of the top surface of the inlet flange, and four local inner grooves are arranged at the end of each threaded hole.

[0008] Compared with the prior art, the utility model has the following beneficial effects:

[0009] 1. The diesel engine intake pipe of the utility model adopts cast aluminum material and technology, and is light in weight. The second cylinder outlet flange of the intake pipe is arranged in the opposite direction to the other outlet flanges, so that the inlet flange between the second and third cylinders has a simple direction and the internal air intake is smooth without sudden changes in cross section.

[0010] 2. The diesel engine intake pipe of the utility model is integrated with fixing holes that can match common rail pipes with different center distances and fixing holes for temperature and pressure sensors, and has a high degree of integration, which reduces the space occupied by the diesel engine.

[0011] 3. The diesel engine intake pipe of the utility model has a partially concave tube body at the ends of the four threaded holes on the inlet flange, which is convenient for casting and demoulding. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Figure 2 It is a rear view structural schematic diagram of the utility model.

[0014] Figure 3 It is a schematic diagram of the installation structure of the utility model.

[0015] Figure 4 It is a schematic diagram of the rear view installation structure of the utility model.

[0016] In the figure: 1. Intake pipe body, 1-1. First cylinder outlet flange, 1-2. Second cylinder outlet flange, 1-3. Third cylinder outlet flange, 1-4. Fourth cylinder outlet flange, 1-5. Inlet flange, 1-6. First fixing hole, 1-7. Second fixing hole, 1-8. Inner groove, 1-9. Parting surface, 2. Common rail pipe, 3. High-pressure oil pipe, 4. Injector, 5. Temperature and pressure sensor, 6. Non-metallic gasket. DETAILED DESCRIPTION

[0017] The utility model is described in conjunction with the accompanying drawings.

[0018] like Figure 1-Figure 4A cast aluminum intake pipe for a diesel engine is shown, comprising an intake pipe body 1; the intake pipe body 1 is made of cast aluminum material and process, and an inlet flange 1-5 for connecting the intake pipeline is provided at the upper intake end of the intake pipe body 1; the lower outlet end of the intake pipe body 1 is provided with four outlet flanges for connecting with the intake end face of the diesel engine cylinder head, which are the first cylinder outlet flange 1-1, the second cylinder outlet flange 1-2, the third cylinder outlet flange 1-3 and the fourth cylinder outlet flange 1-4 in sequence; each of the outlet flanges is provided with a non-metallic gasket at the port Sheet 6; a non-metallic gasket 6 is provided here for sealing and is used to connect with the intake end face of the diesel engine cylinder head; a common rail pipe 2 and a first fixing hole 1-6 for installing the common rail pipe 2 and a second fixing hole 1-7 for installing the temperature and pressure sensor 5 are provided in sequence at the lower part of the intake pipe body 1; a plurality of high-pressure oil pipes 3 are evenly arranged on the common rail pipe 2; the ends of the high-pressure oil pipes 3 are connected to evenly distributed injectors 4; the positions of the high-pressure oil pipes 3 and the injectors 4 are relatively fixed and compact, and such a setting can make the overall integration higher and save space.

[0019] The second cylinder outlet flange 1-2 is arranged in reverse to the other outlet flanges; the second cylinder outlet flange 1-2 arranged in reverse here increases the space between it and the third cylinder outlet flange 1-3, avoiding the embedding of the inlet end of the intake pipe body 1, so that the inlet end channel has no sudden cross-section and the intake is smooth; since the second cylinder flange 1-2 is completely mirrored with the other flanges, the non-metallic gasket 6 is unique and no new parts are added, so the production and management cost control is taken into account; the first fixing holes 1-6 are provided with three in the same direction, and the first fixing holes 1-6 is arranged vertically and away from the intake pipe body 1. The arrangement of the first fixing hole 1-6 here can be combined with each other to fix a variety of common rail pipes 2 with different center distances. The matching versatility is good, the types of parts are effectively reduced, and the production and management costs are reduced; four evenly distributed threaded holes are also arranged at the four corners of the top surface of the inlet flange 1-5, and four local inner grooves 1-8 are arranged at the end of each threaded hole. Four local inner grooves 1-8 are arranged here, which is beneficial to the casting demolding of the intake pipe body 1 along the vertical direction of the parting surface 1-9, and makes the overall weight lighter.

[0020] When the utility model is in use, the intake pipe body 1 is made of cast aluminum material and process, an inlet flange 1-5 is provided at the upper intake end of the intake pipe body for connecting the intake pipeline, and four outlet flanges (respectively, the first cylinder outlet flange 1-1, the second cylinder outlet flange 1-2, the third cylinder outlet flange 1-3, and the fourth cylinder outlet flange 1-4) are sequentially provided at the outlet end of the intake pipe body, which are sealed by a non-metallic gasket 6 and are used to connect with the intake end face of the diesel engine cylinder head; wherein the second cylinder outlet flange 1-2 is arranged in the opposite direction to the other outlet flanges, thereby increasing the space between it and the third cylinder outlet flange 1-3, avoiding the embedding of a clasp in the intake end of the intake pipe body 1, so that the intake end channel has no sudden change in cross section and the intake is smooth; and because the second cylinder flange 1-2 is completely mirrored with the other flanges, the non-metallic gasket 6 is unique in variety and no new parts are added, so that both production and management cost control are taken into account.

[0021] The specific description above further illustrates in detail the purpose, technical solutions and beneficial effects of the utility model. It should be understood that the above description is only a specific embodiment of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A cast aluminum intake pipe for a diesel engine, an intake pipe body (1); wherein: The air intake pipe body (1) is made of cast aluminum material and process, and an inlet flange (1-5) for connecting to an air intake pipeline is provided at the upper air intake end of the air intake pipe body (1); four outlet flanges for connecting to the air intake end surface of a diesel engine cylinder head are provided at the lower air outlet end of the air intake pipe body (1), which are the first cylinder outlet flange (1-1), the second cylinder outlet flange (1-2), the third cylinder outlet flange (1-3) and the fourth cylinder outlet flange (1-4) in sequence; a non-metallic gasket (6) is provided at the port of each outlet flange; the second cylinder outlet flange is arranged in the opposite direction to the other outlet flanges; a common rail pipe (2) and a first fixing hole (1-6) for installing the common rail pipe (2) and a second fixing hole (1-7) for installing a temperature and pressure sensor (5) are provided in sequence at the lower part of the air intake pipe body (1).

2. The cast aluminum intake pipe for a diesel engine according to claim 1, characterized in that: A plurality of high-pressure oil pipes (3) are evenly arranged on the common rail pipe (2); the ends of the high-pressure oil pipes (3) are connected to evenly arranged fuel injectors (4); and the positions of the high-pressure oil pipes (3) and the fuel injectors (4) are relatively fixed and compact.

3. The cast aluminum intake pipe for a diesel engine according to claim 1, characterized in that: Three of the first fixing holes (1-6) are arranged along the same direction, and the first fixing holes (1-6) are arranged vertically and away from the air intake pipe body (1).

4. The cast aluminum intake pipe for a diesel engine according to claim 1, characterized in that: Four evenly distributed threaded holes are also arranged at the four corners of the top surface of the inlet flange (1-5), and four local inner grooves (1-8) are arranged at the end of each threaded hole.

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