Modular integrated exhaust system

Abstract

The utility model relates to the technical field of non-road diesel engines, in particular to a modular integrated exhaust system which comprises an exhaust manifold, a supercharger, an EGR device, an air cylinder cover, an exhaust manifold gasket and a water pump. The supercharger is arranged above the exhaust manifold, the supercharger and the exhaust manifold are connected through four studs and four nuts, the exhaust manifold and the air cylinder cover are connected through eight bolts, and the combination face between the exhaust manifold and the air cylinder cover is sealed through an exhaust manifold gasket. According to the exhaust system, the transverse overall dimension of the exhaust system is reduced through the arrangement mode that the supercharger is arranged at the top and the EGR device is arranged at the bottom; by adopting the design of the opening of the exhaust manifold gasket mounting hole, mistakes are effectively prevented, and plates are saved; the size of the exhaust manifold is reduced by adopting the gradually-shrinking design of the inner cavity of the air inlet section of the exhaust manifold; the bypass length of the pipeline is shortened through the mode that the water inlet pipe of the EGR device is integrated with the water pump.

Description

Technical Field

[0001] The utility model relates to the technical field of non-road diesel engines, in particular to a modular integrated exhaust system. Background Art

[0002] With increasingly stringent emissions regulations for non-road diesel engines, more and more exhaust pollution control devices (such as EGR, DOC, DPF, and SCR) are being added to diesel engine exhaust systems, resulting in a complex set of exhaust system components. At the same time, to reduce blind spots and improve vehicle maneuverability, the lateral space within the engine compartment of small and medium-sized tractors is shrinking. This requires the exhaust system of the supporting diesel engine to be highly compact. However, existing non-road diesel engine exhaust systems are bulky and cannot meet the space design requirements of the entire machine. They have low adaptability and can cause failures due to the excessively close spacing between surrounding components due to the high temperature of the exhaust system. Utility Model Content

[0003] The main utility model object of the utility model is to provide a modular integrated exhaust system, which has a reasonable design and compact layout, effectively solving the problem that the existing small and medium-sized tractor hood space is small and the exhaust system is difficult to arrange. At the same time, it also solves the problem that the surrounding components are baked and fail due to high temperature caused by too small spacing.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A modular integrated exhaust system includes an exhaust manifold, a supercharger, an EGR device, a cylinder head, an exhaust manifold gasket and a water pump; the supercharger is arranged above the exhaust manifold, and the supercharger and the exhaust manifold are connected by four studs and four nuts, the exhaust manifold is connected to the cylinder head by eight bolts, and the joint surface between the exhaust manifold and the cylinder head is sealed by the exhaust manifold gasket; the EGR device is arranged below the exhaust manifold, and the EGR device and the exhaust manifold are connected by four bolts, the EGR device water inlet pipe is connected to the water pump forward, and the EGR device water outlet pipe is connected to the cylinder head rearward.

[0006] Furthermore, mounting holes are provided above and below the exhaust manifold gasket, and the mounting hole above the exhaust manifold gasket adopts an open design. During installation, the notch is required to be located at the upper part of the exhaust manifold, with the notch plane facing upward horizontally to prevent incorrect installation.

[0007] Furthermore, the opening angle a of the mounting hole above the exhaust manifold gasket is less than 60°, so as to ensure that the exhaust manifold gasket does not fall off when suspended on the bolt.

[0008] Furthermore, the mounting hole provided below the exhaust manifold gasket adopts a conventional closed circular hole design, which serves the purpose of positioning and distinguishing the direction.

[0009] Furthermore, the inner cavity of the intake section of the exhaust manifold adopts a tapered transition design combining a flat surface and an inclined surface. The cross-section of the exhaust manifold intake port is offset outward by 0.5 to 1.5 mm relative to the cross-section of the cylinder head outlet port to prevent the dimensional deviation caused by casting and machining from causing the two ports to intersect, thereby reducing exhaust fluency and increasing exhaust resistance.

[0010] Furthermore, the cross-section of the inner cavity of the main pipe section of the exhaust manifold is equal to the size or cross-sectional area of ​​the cylinder head outlet, so as to reduce the total volume of the exhaust manifold and optimize the space occupancy.

[0011] Furthermore, a water pump high-pressure chamber and an internal integrated pipeline of the water pump are integrated in the water pump, and a water pump outlet joint is installed on the internal integrated pipeline of the water pump. The cooling water of the EGR device is drawn out from the water pump high-pressure chamber, flows out from the exhaust side water pump outlet joint through the internal integrated pipeline of the water pump, and is then connected to the EGR device through a hose, which greatly shortens the detour length of the pipeline.

[0012] The overall structural design of the modular integrated exhaust system of the utility model is scientific and has the following technical features and advantages when used in practice:

[0013] 1. The supercharger in the exhaust system of this utility model is placed above the exhaust manifold, and the EGR device is placed below the exhaust manifold. The water inlet pipe of the EGR device is connected to the water pump forward, and the return pipe is connected to the cylinder head rearward. The overall layout is reasonable, effectively reducing the lateral outline size of the exhaust system. There are two mounting holes on the exhaust manifold gasket. The upper mounting hole adopts an open design, and the lower mounting hole adopts a conventional closed circular hole design. During installation, the notch is required to be located at the top of the exhaust manifold with the notch plane facing horizontally upward. There is no need for error-proofing markings, which simplifies production and saves sheet materials.

[0014] 2. The exhaust manifold intake section of the exhaust system of this invention adopts a tapered transition design combining flat and inclined surfaces. The cross-section of the exhaust manifold intake port is offset outward by 0.5 to 1.5 mm relative to the cylinder head outlet port. This prevents dimensional deviations during casting and machining from causing the two ports to intersect, thereby reducing exhaust flow and increasing exhaust resistance. The cross-section of the exhaust manifold main section is reduced to the same size or cross-sectional area as the cylinder head outlet port, reducing the total volume of the exhaust manifold and reducing space usage.

[0015] 3. The cooling water of the EGR device in the exhaust system of the present invention is drawn out from the high-pressure chamber, flows out from the exhaust side water pump outlet joint through the integrated pipeline inside the water pump, and is then connected to the EGR device through a hose, which greatly shortens the detour length of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of exhaust system assembly structure - right view;

[0017] Figure 2 Schematic diagram of exhaust system assembly structure - rear view;

[0018] Figure 3 Schematic diagram of the exhaust manifold gasket structure;

[0019] Figure 4 It is a schematic cross-sectional view of the exhaust manifold inlet section structure;

[0020] Figure 5 This is a schematic diagram of the water pump structure;

[0021] The numbers in the figure are: 1-engine body, 2-EGR device, 3-EGR device water outlet pipe, 4-exhaust manifold, 5-cylinder head, 6-supercharger, 7-EGR device water inlet pipe, 8-water pump, 8.1-water pump high-pressure chamber, 8.2-water pump internal integrated pipe, 8.3-water pump outlet joint, 9-exhaust manifold gasket; A-width from the exhaust manifold inlet end face to the main pipe section, B-width from the exhaust manifold main pipe section to the outlet bend section, C-width from the exhaust manifold outlet bend section to the outer contour of the supercharger, D-height from the exhaust manifold outlet end face to the outer contour of the supercharger, a-opening angle of the exhaust manifold gasket mounting hole. DETAILED DESCRIPTION

[0022] Specific embodiment 1: In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that when an element is referred to as "fixed on" or "set on" another element, it can be directly or indirectly connected to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "left" and "right" used to indicate orientation in this application document are based on the specific structure shown in the drawings and do not constitute a limitation on the structure. As shown in the attached drawings of the specification, Figure 1As shown, in order to solve the problems that the existing off-road diesel engine exhaust system is bulky, cannot meet the space design requirements of the whole machine, has low supporting adaptability, and the surrounding components are baked and failed by the high temperature of the exhaust system due to the small spacing, the utility model designs and provides a modular integrated exhaust system, which specifically includes an exhaust manifold 4, a supercharger 6, an EGR device 2, a cylinder head 5, an exhaust manifold gasket 9 and a water pump 8; the supercharger 6 is arranged above the exhaust manifold 4, and the supercharger 6 and the exhaust manifold 4 are connected by four studs and four nuts, the exhaust manifold 4 is connected to the cylinder head 5 by eight bolts, and the joint surface between the exhaust manifold 4 and the cylinder head 5 is sealed by the exhaust manifold gasket 9, The EGR device 2 is positioned below the exhaust manifold 4, connected by four bolts. The water pump 8 houses a high-pressure chamber 8.1 and an integrated internal water pump conduit 8.2. A water pump outlet connector 8.3 is mounted on this internal water pump conduit 8.2. The EGR device's water inlet pipe 7 connects forward to the water pump 8, while the EGR device's water outlet pipe 3 connects rearward to the cylinder head 5. Measured from the exhaust port end of the cylinder head 5, the exhaust system's lateral width is A+B+C. This is 40-50mm less than the A+D width of a traditional side-mounted supercharger, effectively reducing the exhaust system's lateral profile and addressing the issue of insufficient lateral clearance under the hood.

[0023] As the instruction manual Figure 2 As shown in the figure, A is the width from the exhaust manifold inlet end face to the main pipe section, B is the width from the exhaust manifold main pipe section to the outlet bending section, C is the width from the exhaust manifold outlet bending section to the outer contour of the supercharger, D is the height from the exhaust manifold outlet end face to the outer contour of the supercharger, and a is the opening angle of the exhaust manifold gasket mounting hole. The mounting hole above the exhaust manifold gasket 9 in the exhaust system of the present invention adopts an open design (opening angle a < 60° to ensure that the exhaust manifold gasket 9 does not fall off when hung on the bolt). During installation, the notch is required to be located on the upper part of the exhaust manifold 4, and the notch plane is horizontally facing upward to prevent misinstallation; the mounting hole below the exhaust manifold gasket 9 adopts a conventional closed circular hole design, which plays a role in positioning and distinguishing the direction. The two mounting holes of the traditional exhaust manifold gasket are both closed circular holes. In the absence of anti-error markings, misinstallation may occur, resulting in sealing failure. The exhaust manifold gasket of the present invention with the above-mentioned structural design does not require anti-error markings, is simple to make, and the notch design can save plate consumption.

[0024] As the instruction manual Figure 3As shown, the intake section of the exhaust manifold 4 in the exhaust system of the present invention adopts a tapered transition design that combines a flat surface and an inclined surface. The cross-section of the exhaust manifold 4 intake port is offset outward by 0.5 to 1.5 mm relative to the cross-section of the cylinder head 5 outlet port to prevent dimensional deviations caused by casting and machining from causing the two ports to intersect, thereby reducing exhaust flow and increasing exhaust resistance. The cross-section of the main section of the exhaust manifold 4 is reduced to the same size or cross-sectional area as the cylinder head 5 outlet port, reducing the total volume of the exhaust manifold and optimizing space occupancy. Traditional pipe port transition structures have only one inclined surface. Due to casting or machining deviations during actual production, the port size may be difficult to guarantee. The transition structure of the present invention adopts a combined flat and inclined surface design, which is more conducive to controlling the size of the exhaust manifold port and ensuring exhaust flow.

[0025] As the instruction manual Figure 1 , Instruction Manual Figure 4 And the instruction manual Figure 5 As shown, the cooling water of the EGR device 2 in the exhaust system of the present invention is drawn from the water pump high-pressure chamber 8.1, and flows out from the water pump outlet joint 8.3 through the integrated pipe 8.2 inside the water pump. The traditional water pump outlet joint 8.3 is set near the water pump high-pressure chamber 8.1, and the cooling water connecting pipe detours above the water pump 8 from left to right. The present invention directly straightens the detour pipe and integrates it on the water pump 8 body, saving hood space and reducing the types and number of required assembly parts. In general, the modular integrated exhaust system of the present invention reduces the lateral profile size of the exhaust system by arranging the supercharger 6 on top and the EGR device 2 on the bottom; effectively prevents errors and saves plate materials by adopting the exhaust manifold gasket mounting hole opening design; reduces the exhaust manifold volume by adopting the exhaust manifold intake section cavity tapering design; and shortens the pipeline detour length by integrating the EGR device water inlet pipe 7 with the water pump 8. The exhaust system is rationally designed and compactly arranged, which solves the problem of small space in the existing hood and difficulty in arranging the exhaust system. It also solves the problem of surrounding components being baked and failing due to high temperature due to small spacing.

[0026] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements shall fall within the scope of the present invention as claimed.

Claims

1. A modular integrated exhaust system, characterized in that: The invention comprises an exhaust manifold (4), a supercharger (6), an EGR device (2), a cylinder head (5), an exhaust manifold gasket (9) and a water pump (8); the supercharger (6) is arranged above the exhaust manifold (4), and the supercharger (6) and the exhaust manifold (4) are connected by four studs and four nuts; the exhaust manifold (4) and the cylinder head (5) are connected by eight bolts; the joint surface between the exhaust manifold (4) and the cylinder head (5) is sealed by the exhaust manifold gasket (9); the EGR device (2) is arranged below the exhaust manifold (4), and the EGR device (2) and the exhaust manifold (4) are connected by four bolts; the EGR device water inlet pipe (7) is connected to the water pump (8) in the front direction, and the EGR device water outlet pipe (3) is connected to the cylinder head (5) in the rear direction.

2. A modular integrated exhaust system according to claim 1, characterized in that: Mounting holes are respectively provided above and below the exhaust manifold gasket (9), and the mounting hole above the exhaust manifold gasket (9) is designed to be open. During installation, the notch is required to be located at the upper part of the exhaust manifold (4), with the notch plane facing upwards to prevent mis-installation.

3. A modular integrated exhaust system according to claim 2, characterized in that: The opening angle a of the mounting hole above the exhaust manifold gasket (9) is less than 60°, so as to ensure that the exhaust manifold gasket (9) does not fall off when it is hung on the bolt.

4. A modular integrated exhaust system according to claim 3, characterized in that: The mounting hole provided below the exhaust manifold gasket (9) adopts a conventional closed circular hole design, which plays the role of positioning and distinguishing the direction.

5. A modular integrated exhaust system according to claim 4, characterized in that: The inner cavity of the intake section of the exhaust manifold (4) adopts a tapered transition design combining a plane and an inclined surface, and the cross section of the exhaust manifold (4) intake port is offset outward by 0.5 to 1.5 mm relative to the cross section of the cylinder head (5) outlet port.

6. A modular integrated exhaust system according to claim 5, characterized in that: The inner cavity cross-section of the main pipe section of the exhaust manifold (4) is equal in size or cross-sectional area to the cylinder head air outlet, so as to reduce the total volume of the exhaust manifold (4) and optimize the space occupancy rate.

7. The modular integrated exhaust system according to claim 1, characterized in that: A water pump high-pressure chamber (8.1) and a water pump internal integrated pipe (8.2) are integrated in the water pump (8). A water pump outlet joint (8.3) is installed on the water pump internal integrated pipe (8.2). Cooling water of the EGR device (2) is drawn from the water pump high-pressure chamber (8.1), flows out from the exhaust side water pump outlet joint (8.3) through the water pump internal integrated pipe (8.2), and is then connected to the EGR device through a hose.

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