An engine, a supercharger, an air intake pipe, and a supercharger connection structure

Abstract

The present invention discloses a supercharger, which includes a supercharger body. A first limiting shoulder with a radial protrusion is provided on the intake pipe of the supercharger near the volute side; the outer diameter of the first limiting shoulder is larger than the outer diameter of the intake pipe, and the intake pipe body on its right side serves as an assembly section for connecting an intake connection pipe. The present invention has the advantages of a compact structure and less occupied assembly space, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and particularly to an engine, a supercharger, an intake pipe, and a supercharger connection structure. Background Art

[0002] Currently, in the assembly design of diesel engine components, some supercharger assemblies are arranged on the side of the cylinder head (top-mounted) or the lower side of the cylinder block (inverted). When matching with the whole vehicle, the overall height of the engine with a top-mounted supercharger structure is relatively high, requiring a large layout space for the engine in the whole vehicle, and the position of the cab is also relatively high. This structural arrangement causes interference between the diesel engine and the cab when installed on many vehicle models, and cannot meet the matching requirements of the whole vehicle. For the engine with an inverted supercharger, the overall height is relatively low, and the width can also meet the requirements of the automobile factory, but the layout is too compact. Moreover, with the development of engine technology, the accessories installed on the engine are increasing continuously, and the layout space for the supercharger pipeline is tense and difficult. Whether the supercharger is arranged in the middle or in other non-middle positions, the supercharger pipeline (supercharger intake pipe) is prone to interference with other accessories.

[0003] In some existing engine models, the supercharger inlet pipe and the intake pipe form a seal through the fitting of the end faces, and then are locked by a V-shaped clamp. On the other hand, due to the influence of the assembly space of the whole vehicle, it is difficult to arrange the supercharger and its pipeline away from the engine body.

[0004] The disclosure of the above background art content is only used to assist in understanding the concept and technical solution of the present invention, and it does not necessarily belong to the prior art of this patent application. Without clear evidence indicating that the above content was publicly available on the filing date of this patent application, the above background art should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention

[0005] The purpose of the present invention is to provide an engine with a compact structure and anti-interference, as well as a supercharger, an intake pipe structure, and a supercharger connection structure that reduce the requirements for assembly space.

[0006] To this end, the present invention provides an engine, a supercharger, an intake pipe, and a supercharger connection structure.

[0007] Preferably, the present invention may further have the following technical features:

[0008] A supercharger includes a supercharger body. A first limiting shoulder protruding radially is provided on the supercharger inlet pipe near the volute side; the outer diameter of the first limiting shoulder is greater than the outer diameter of the inlet pipe, and the pipe body of the inlet pipe on its right side serves as an assembly section for connecting the intake pipe.

[0009] Further, the cross-section of the first limiting shoulder along the axial direction of the intake pipe is a trapezoidal structure, the side surface close to the port of the intake pipe is a vertical plane, perpendicular to the intake pipe, and the other side surface opposite to the vertical plane is an inclined surface.

[0010] A supercharger connection structure, including a connecting piece and an intake pipe, is characterized in that: the supercharger as described above is further included, the assembly section of the intake pipe of the supercharger and the lower end of the intake pipe are sleeved, a second limiting shoulder protruding radially is provided at the lower port of the intake pipe, the second limiting shoulder corresponds to and abuts against the first limiting shoulder; the connecting piece presses the first limiting shoulder and the second limiting shoulder to ensure the connection tightness between the supercharger and the intake pipe; the upper end of the intake pipe is the intake end, the lower end is the outlet end, and the pipe body connecting the intake end and the outlet end is a transition section. The side close to the supercharger and the side close to the oil cooler of the transition section are respectively flattened towards the central axis side of the transition section, so that the intake pipe has a structure with a flattened middle and round ends.

[0011] Further, the front side of the second limiting shoulder is a vertical plane and fits with the vertical plane of the first limiting shoulder, and the rear side is an inclined plane; the connecting piece is a V-shaped clamp.

[0012] Further, the cross-sectional areas of the intake end and the outlet end of the intake pipe are the same, and the cross-sectional area of the transition section is not less than the cross-sectional area of the intake port of the intake pipe to ensure the ventilation flow rate and air flow stability of the transition section.

[0013] Further, a cylindrical hole with an enlarged inner diameter is provided at the outlet end of the intake pipe, a transition surface is formed at the bottom of the cylindrical hole, and the height of the transition surface is equal to the pipe thickness of the assembly section; the length of the cylindrical hole is equal to the length of the assembly section, that is, when the first limiting shoulder and the second limiting shoulder are in contact, the front end face of the intake pipe of the supercharger just fits against the bottom of the cylindrical hole.

[0014] An intake pipe applied to the above supercharger connection structure, the upper end of the intake pipe is the intake end, the lower end is the outlet end, and the pipe body connecting the intake end and the outlet end is a transition section, and is characterized in that: the opposite sides of the transition section are respectively flattened towards the central axis side of the transition section, so that the intake pipe has a structure with a flattened middle and round ends.

[0015] Further, the cross-sectional areas of the intake end and the outlet end of the intake pipe are the same, and the cross-sectional area of the transition section is not less than the cross-sectional area of the intake port of the intake pipe to ensure the ventilation flow rate and air flow stability of the transition section; a cylindrical hole with an enlarged inner diameter is provided at the outlet end of the intake pipe, and a transition surface is formed at the bottom of the cylindrical hole.

[0016] An engine, comprising a body, an exhaust pipe, and an oil cooler, is characterized in that: it further includes the above-mentioned supercharger connection structure, the supercharger is installed on the exhaust pipe, the oil cooler is installed on the body and on the right side of the supercharger, and the intake connection pipe is located between the supercharger and the oil cooler.

[0017] Further, the supercharger is installed in the middle of the exhaust pipe; the types of the engine include a fuel engine or a gas engine.

[0018] The beneficial effects of the present invention compared with the prior art include: by improving the connection method of the supercharger and the intake connection pipe, and improving the pipe body structure of the intake connection pipe, the installation space required for assembling the intake connection pipe is reduced, especially the assembly space of the supercharger and the intake connection pipe in the front and rear directions of the engine is reduced, interference between the intake connection pipe and the oil cooler is avoided, and the installation positions of the supercharger or other related engine accessories do not need to be moved, improving the compactness of the product design, and further improving the vehicle adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the supercharger assembly of the present invention.

[0020] Figure 2 is a schematic top view of the supercharger connection structure of the present invention.

[0021] Figure 3 is a schematic front view of the supercharger connection structure of the present invention.

[0022] Figure 4 is a front view of the intake connection pipe of the present invention.

[0023] Figure 5 is Figure 4 a cross-sectional view taken along C-C in

[0024] Figure 6 is a comparison data table of the solution of the present invention and the existing solution.

[0025] Figure 7 is a schematic diagram of the positions of section I and section II of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0026] The present invention will be further described in detail below in conjunction with the specific embodiments and with reference to the accompanying drawings. It should be emphasized that the following description is merely exemplary and not intended to limit the scope of the present invention and its applications.

[0027] Referring to the following drawings, non-limiting and non-exclusive embodiments will be described, where the same reference numerals represent the same components, unless otherwise specifically stated.

[0028] As Figure 1A supercharger as shown includes a supercharger body. A first limiting shoulder 2 with a radial protrusion is provided on the intake pipe of the supercharger 1 near the scroll housing side, and the outer diameter of the first limiting shoulder 2 is larger than that of the intake pipe. The cross-section of the first limiting shoulder 2 in the axial direction of the intake pipe is a trapezoidal structure, and the side surface close to the intake pipe port is a vertical plane perpendicular to the intake pipe, and the other side surface (i.e., the side close to the scroll housing) opposite to the vertical plane is an inclined surface. The outer diameter of the first limiting shoulder 2 is larger than that of the intake pipe, and the pipe body of the intake pipe on the right side of the first limiting shoulder 2 serves as an assembly section 11 for connecting the intake connection pipe. Generally, in existing superchargers, a shoulder is provided at the intake pipe port for butt-joint with the end face of the intake connection pipe 3.

[0029] Referring to Figures 1-3 , a supercharger connection structure includes a connecting member (not shown), an intake connection pipe 3, and the above-mentioned supercharger 1. Generally, the connection between the existing supercharger and the intake connection pipe is made by end-face fitting and then locking with a connecting member (clamp). In this connection method, a large assembly space is required for the connection between the supercharger and the intake connection pipe, which causes interference between the intake connection pipe and adjacent engine accessories (such as the oil cooler 5). As an improvement, the intake pipe of the supercharger 1 and the lower end of the intake connection pipe 3 are sleeved. A second limiting shoulder 4 with a radial protrusion is provided at the lower port of the intake connection pipe 3. The second limiting shoulder 4 corresponds to and abuts against the first limiting shoulder 2, and then the first limiting shoulder 2 and the second limiting shoulder 4 are pressed tightly by a connecting member to ensure the connection tightness between the supercharger 1 and the intake connection pipe 3. The supercharger 1 and the intake connection pipe 3 are sleeved and installed, and they can be in clearance fit, and they have a contact surface in the axial direction. Furthermore, the installation position of the intake connection pipe 3 can be moved as a whole towards the supercharger side, thereby reducing the required assembly space of the intake connection pipe 3, avoiding interference between the intake connection pipe 3 and other engine accessories, and improving the compactness of the engine. Specifically, the front side of the second limiting shoulder 4 is a vertical plane and fits with the vertical plane of the first limiting shoulder 2, and the rear side is an inclined plane. Preferably, the second limiting shoulder 4 is symmetric with the first limiting shoulder 2 to a certain extent. Further, the connecting member is a V-shaped clamp. Using the V-shaped clamp to connect the first limiting shoulder 2 and the second limiting shoulder 4, the assembly is simple and convenient for disassembly and assembly.

[0030] Combined with Figures 4-5 , the upper end of the intake connection pipe 3 is the intake end 31, the lower end is the outlet end 33, and the pipe body connecting the intake end 31 and the outlet end 33 is the transition section 32. The opposite sides of the transition section 32 are respectively flattened towards the central axis side of the transition section, so that the intake connection pipe 3 has a structure with a flattened middle and round ends. Specifically, the side of the transition section close to the supercharger 1 and the opposite side (i.e., the side close to the oil cooler 5) are respectively flattened towards the central axis side of the transition section. For example, looking at the intake connection pipe 3 from the supercharger 1 side, the side of the intake connection pipe 3 seen is the widest in the middle and small at the upper and lower ends (such as Figure 4), wherein, the width of the transition section 32 gradually decreases from the middle to the upper and lower ends. It should be noted that the cross-sectional areas of the air inlet end 31 and the air outlet end 33 of the air inlet pipe 3 are the same, and although the transition section 32 becomes flattened, the cross-sectional area at each part of the transition section 32 is not less than the cross-sectional area of the air inlet end 31 of the air inlet pipe 3 to ensure the ventilation flow rate and air flow stability of the transition section 32.

[0031] Refer to again Figure 5 , a cylindrical hole 34 with an increasing inner diameter is provided at the air outlet end 33 of the air inlet pipe 3, and a transition surface is formed at the bottom of the cylindrical hole 34. Preferably, the height of the transition surface is equal to the pipe thickness of the assembly section 11. The length of the cylindrical hole 34 is equal to the length of the assembly section 11, that is, when the first limiting shoulder 2 and the second limiting shoulder 4 are in contact, the front end face of the intake pipe of the supercharger 1 just fits against the bottom of the cylindrical hole 34.

[0032] Refer to Figure 6 , Figure 6 In the original scheme in λ-1 , the resistance △P from the inlet of the air inlet end 31 of the air inlet pipe 3 to the air outlet end 33 of the air inlet pipe λ-2 ; the resistance △P from the inlet of the air inlet end 31 of the air inlet pipe to the position of the compressor blade of the supercharger 1 Figure 6 It can be seen that the resistance △P from the inlet of the air inlet end 31 of the air inlet pipe of the scheme of the present invention to the air outlet end 33 of the air inlet pipe λ-1 is 0.34 KPa, which is lower than 0.502 KPa of the original scheme; the resistance △P from the inlet of the air inlet end of the air inlet pipe of the scheme of the present invention to the position of the compressor blade of the supercharger λ-2 is 1.841 KPa, slightly lower than 1.904 KPa of the original scheme; the velocity uniformity at the position of the compressor blade opening of the scheme of the present invention is 0.958, and that of the original scheme is 0.959. Thus, it can be seen that the scheme of the present invention is slightly superior to the original scheme in some main performances, or is basically the same as the original scheme, meets the technical requirements, and can well solve the problem of interference between the air inlet pipe 3 and other engine accessories.

[0033] Preferably, the air outlet end is horizontally arranged, and the inlet of the air inlet pipe is vertical or inclined at a certain angle.

[0034] Refer to again Figures 4-5, an intake pipe of a supercharger. The upper end of the intake pipe 3 is the intake end 31, and the lower end is the outlet end 33. The pipe body connecting the intake end 31 and the outlet end 33 is the transition section 32. The opposite sides of the transition section 32 are respectively flattened towards the central axis side of the transition section 32, so that the intake pipe 3 has a structure with a flattened middle and round ends. During actual assembly, the side of the transition section 32 close to the supercharger 1 and the opposite side (the side close to the oil cooler 5) are respectively flattened towards the central axis side of the transition section 32. When looking at the intake pipe 3 from the side of the supercharger 1, the side of the intake pipe 3 seen is widest in the middle and small at both the upper and lower ends. Among them, the width of the transition section gradually decreases from the middle to both ends. It should be noted that the cross-sectional areas of the intake end and the outlet end of the intake pipe are the same, and although the transition section is flattened, the cross-sectional area of the transition section is not less than the cross-sectional area of the intake port of the intake pipe to ensure the ventilation flow rate and air flow stability of the transition section. The structure of the intake pipe 3 has been discussed above and will not be repeated here.

[0035] Combined with Figures 1-3 , an engine includes a cylinder block 7, an exhaust pipe 6, an oil cooler 5, and also includes the above-mentioned supercharger connection structure. The supercharger 1 is installed on the exhaust pipe 6, the oil cooler 5 is installed on the cylinder block 7 and on the right side of the supercharger 1, and the intake pipe 3 is located between the supercharger 1 and the oil cooler 5. The engine can be a fuel engine or a gas engine. By improving the connection method between the supercharger 1 and the intake pipe 3 and the pipe body structure of the intake pipe 3, the installation space required for assembling the intake pipe 3 is reduced, interference between the intake pipe 3 and the oil cooler 5 is avoided, and the installation position of the supercharger 1 does not need to be moved, making the structure of the engine more compact. The structures of the supercharger 1 and the intake pipe 3 have been discussed above and will not be repeated here.

[0036] In a preferred solution, the supercharger 1 is installed in the middle of the exhaust pipe 6 to form a mid-mounted layout of the supercharger 1, which is beneficial to optimizing the internal flow field in the exhaust pipe 6 and making the exhaust smoother; at the same time, it improves the arrangement of the installation bolts of the supercharger 1, optimizes the problem of thermal stress concentration, and improves the reliability of the exhaust pipe 6.

[0037] Those skilled in the art will recognize that numerous modifications to the above description are possible, so the embodiments and the drawings are only used to describe one or more specific embodiments.

[0038] Although the exemplary embodiments of the invention have been described and recited, those skilled in the art will understand that various changes and substitutions can be made thereto without departing from the spirit of the invention. Additionally, many modifications can be made to adapt a particular situation to the teachings of the invention without departing from the central concept of the invention described herein. Therefore, the invention is not limited to the specific embodiments disclosed herein, but the invention may also include all embodiments and their equivalents that fall within the scope of the invention.

Claims

1. A supercharger connection structure, comprising a connecting member, an intake pipe joint, and a supercharger. A first limiting shoulder protruding radially is provided on the intake pipe of the supercharger near the scroll housing side; the outer diameter of the first limiting shoulder is larger than the outer diameter of the intake pipe, and the pipe body of the intake pipe on its right side serves as an assembly section for connecting the intake pipe joint. The cross-section of the first limiting shoulder along the axial direction of the intake pipe is a trapezoidal structure, the side surface near the port of the intake pipe is a vertical plane, perpendicular to the intake pipe, and the other side surface opposite to the vertical plane is an inclined surface. The assembly section of the intake pipe of the supercharger and the lower end of the intake pipe joint are sleeved. A second limiting shoulder protruding radially is provided at the lower port of the intake pipe joint. The second limiting shoulder corresponds to and abuts against the first limiting shoulder; the connecting member presses the first limiting shoulder and the second limiting shoulder to ensure the connection sealing performance between the supercharger and the intake pipe joint; the upper end of the intake pipe joint is the intake end, the lower end is the outlet end, and the pipe body connecting the intake end and the outlet end is a transition section. The side of the transition section near the supercharger and the side near the oil cooler are respectively flattened towards the central axis side of the transition section, so that the intake pipe joint has a structure with a flattened middle and round ends. The cross-sectional areas of the intake end and the outlet end of the intake pipe joint are the same, and the cross-sectional area of the transition section is not less than the cross-sectional area of the intake port of the intake pipe joint to ensure the ventilation flow rate and air flow stability of the transition section.

2. The supercharger connection structure according to claim 1, characterized in that: The front side of the second limiting shoulder is a vertical plane, which fits with the vertical plane of the first limiting shoulder, and the rear side is an inclined surface; the connecting member is a V-shaped clamp.

3. The supercharger connection structure according to claim 1, characterized in that: A cylindrical hole with an increasing inner diameter is provided at the outlet end of the intake pipe joint. A transition surface is formed at the bottom of the cylindrical hole, and the height of the transition surface is equal to the pipe thickness of the assembly section; the length of the cylindrical hole is equal to the length of the assembly section, that is, when the first limiting shoulder and the second limiting shoulder are in contact, the front end surface of the intake pipe of the supercharger just fits against the bottom of the cylindrical hole.

4. An intake pipe of the supercharger connection structure applied in claim 1, wherein the upper end of the intake pipe is the intake end, the lower end is the outlet end, and the pipe body connecting the intake end and the outlet end is the transition section, and it is characterized in that: The opposite sides of the transition section are respectively flattened towards the central axis side of the transition section, so that the intake pipe joint has a structure with a flattened middle and round ends.

5. The intake pipe according to claim 4, characterized in that: The cross-sectional areas of the intake end and the outlet end of the intake pipe joint are the same, and the cross-sectional area of the transition section is not less than the cross-sectional area of the intake port of the intake pipe joint to ensure the ventilation flow rate and air flow stability of the transition section; a cylindrical hole with an increasing inner diameter is provided at the outlet end of the intake pipe joint, and a transition surface is formed at the bottom of the cylindrical hole.

6. An engine, comprising a body, an exhaust pipe, and an oil cooler, characterized in that: It also includes the supercharger connection structure described in claim 1. The supercharger is installed on the exhaust pipe, the oil cooler is installed on the engine body and on the right side of the supercharger, and the intake pipe joint is located between the supercharger and the oil cooler.

7. An engine according to claim 6, characterized in that: The supercharger is installed in the middle of the exhaust pipe; the types of the engine include a fuel engine or a gas engine.

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