Engine air inlet system and engineering machinery

Abstract

The utility model provides an engine air inlet system and engineering machinery, the engine air inlet system comprises at least two turbochargers used for generating supercharged airflow, at least two intercoolers corresponding to the at least two turbochargers, at least two air inlet pipes and at least two air outlet pipes, the air inlet pipes are connected between the corresponding turbochargers and the intercoolers, and the air outlet pipes are used for communicating the intercoolers with an engine, so that the supercharged airflow is conveyed to the engine through the air inlet pipes, the intercoolers and the air outlet pipes; the engine air inlet system further comprises a bypass pipe which enables the at least two intercoolers to be communicated with each other so as to balance the internal pressure of the at least two intercoolers. The bypass pipe is fixedly installed on the intercooler through the multiple fixing structures so as to ensure the connection stability, the bypass pipe communicates with the two air outlet pipes, the air inlet pressure of an engine is balanced, and therefore the combustion efficiency and the operation stability of the engine are improved.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery, and in particular to an engine intake system and engineering machinery having the above-mentioned engine intake system. Background Technology

[0002] A car engine is the device that provides power to a vehicle. The engine's intake system can be categorized into four types: naturally aspirated, turbocharged, supercharged, and twin-turbocharged. Engines used in large construction machinery often employ a V-type twin-turbo structure. Air is supplied to the intake manifold through two separate intercoolers after being turbocharged. This air enters the engine, participates in combustion, and is converted into mechanical power. However, the intake manifolds on both sides of the engine are independent. This design leads to different intake pressures on both sides, affecting engine combustion efficiency and operational stability. To avoid these problems, most existing technologies aim to ensure that the intake conditions of the two turbochargers are as similar as possible before the turbochargers. However, they do not consider the influence of the turbochargers, intercoolers, and piping on the intake pressure. This is especially true when the engine uses an air-to-intercooling system, where the longer piping after turbocharging results in a greater pressure impact, limiting the effectiveness of pressure balancing. Therefore, it is necessary to provide a more novel intake structure that better maintains intake pressure balance. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide an engine intake system and engineering machinery that can keep the intake pressure consistent and is easy to assemble and manufacture.

[0004] One embodiment of this utility model provides an engine intake system, including at least two turbochargers for generating pressurized airflow, at least two intercoolers corresponding to the at least two turbochargers, at least two intake pipes, and at least two exhaust pipes. The intake pipes are connected between the corresponding turbochargers and intercoolers, and the exhaust pipes are used to connect the intercoolers to the engine, so that the pressurized airflow is delivered to the engine through the intake pipes, intercoolers, and exhaust pipes. The engine intake system also includes a bypass pipe that connects the at least two intercoolers to each other to balance the internal pressure of the at least two intercoolers.

[0005] Furthermore, the intake pipe and the exhaust pipe are located on the same side of the intercooler, while the bypass pipe is located on the side of the intercooler opposite to the exhaust pipe.

[0006] Furthermore, the intercooler has a connector on the side facing away from the outlet pipe for connecting the end of the bypass pipe to the intercooler, and the connector is aligned with the inlet of the outlet pipe into the intercooler.

[0007] Furthermore, an exhaust manifold is provided at one end of the exhaust pipe near the intercooler, and the exhaust manifold passes through the connector and connects to the bypass pipe.

[0008] Furthermore, it also includes a fixing structure for fixing the bypass pipe. The fixing structure includes a first fixing plate and a second fixing plate. The first fixing plate and the second fixing plate are both straight strips and are respectively arranged in two mutually perpendicular planes. One side of the first fixing plate is connected to one side of the second fixing plate. The end of the first fixing plate is fixedly connected to the intercooler.

[0009] Furthermore, the fixing structure also includes a fixing clamp for fixing the bypass pipe to the second fixing plate, the fixing clamp being sleeved on the outside of the bypass pipe and connected to the second fixing plate.

[0010] Furthermore, the bypass pipe is equipped with transition joints at both ends, which are connected to the connecting seat.

[0011] Another embodiment of this utility model provides an engineering machine, including the above-mentioned engine intake system and engine, with the exhaust pipe connected to the engine's combustion chamber.

[0012] Furthermore, the engine includes at least two intake manifolds, and at least two exhaust pipes are respectively connected to the combustion chamber of the engine through the at least two intake manifolds.

[0013] Furthermore, the bypass pipe is connected to at least two intake manifolds respectively.

[0014] This utility model provides an engine intake system, including at least two turbochargers, at least two intercoolers, two intake pipes, two exhaust pipes, a bypass pipe, and multiple fixing structures. The bypass pipe is connected to the intercooler via an adapter and a connecting seat, with its middle portion fixed to one side of the intercooler by a fixing clamp. Multiple fixing structures securely mount the bypass pipe to the intercooler, ensuring the stability of the bypass pipe connection. The bypass pipe connects the two exhaust pipes, balancing the pressure on both sides of the exhaust pipes, thus achieving balanced intake pressure in the engine, thereby improving engine combustion efficiency and operational stability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of an engine intake system provided in a preferred embodiment of the present invention.

[0017] Figure 2 for Figure 1 A partial schematic diagram of the engine intake system is provided.

[0018] Figure 3 for Figure 1 A partial schematic diagram of the connection bracket for the engine intake system.

[0019] Figure 4 for Figure 1 A cross-sectional view of the exhaust manifold of the engine intake system is provided.

[0020] Figure 5 For having Figure 1 A schematic diagram of the engineering machinery providing the engine intake system.

[0021] In the diagram: 1. Bypass pipe; 2. Transition joint; 3. Connecting seat; 4. Fixing structure; 41. First fixing plate; 42. Second fixing plate; 43. Fixing clamp; 5. Intercooler; 6. Intake pipe; 7. Exit pipe; 71. Exit manifold; 8. Turbocharger; 9. Intake manifold; 10. Engine; 11. Construction machinery. Detailed Implementation

[0022] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0023] like Figures 1 to 4 As shown, one embodiment of this application provides an engine intake system, including at least two turbochargers 8, at least two intercoolers 5 corresponding to the at least two turbochargers 8, at least two intake pipes 6, at least two exhaust pipes 7, and a bypass pipe 1. The turbochargers 8 are used to generate pressurized airflow. The intake pipes 6 are connected between the corresponding turbochargers 8 and the intercoolers 5. The exhaust pipes 7 are used to connect the intercoolers 5 to the engine 10, so that the pressurized airflow is delivered to the engine 10 through the intake pipes 6, the intercoolers 5, and the exhaust pipes 7. The bypass pipes 1 are used to connect the at least two intercoolers 5 to each other to balance the pressure of the at least two intercoolers 5, thereby keeping the intake pressure of the engine 10 consistent.

[0024] The intercooler 5 has a flat structure. The intake pipe 6 and the exhaust pipe 7 are connected to one side of the intercooler 5, and the bypass pipe 7 is connected to the other side. A connecting seat 3 is provided on the side of the intercooler 5 facing away from the exhaust pipe 7. The connecting seat 3 is used to connect the end of the bypass pipe 1 to the intercooler 5, wherein the connecting seat 3 is aligned with the interface where the exhaust pipe 7 enters the intercooler 5. The exhaust pipe 7 includes an exhaust manifold 71, which is located at the end of the exhaust pipe 7 near the intercooler 5 and is housed within the intercooler 5. The connecting seat 3 is inserted to connect the exhaust pipe 7 to the bypass pipe 1. By connecting the left and right exhaust pipes 7 through the bypass pipe 1, and with the connection point close to the intake manifold 9 of the engine 10, the resistance effect of airflow through the intercooler 5 can be reduced, ensuring consistent intake pressure on the left and right sides of the engine 10, thereby improving the combustion efficiency and operational stability of the engine 10. In another embodiment, the bypass pipe 1 can also be connected between the two intake manifolds 9 of the engine 10.

[0025] The engine intake system also includes multiple fixing structures 4, each including a first fixing plate 41, a second fixing plate 42, and fixing clamps 43. The fixing clamps 43 are fitted over the bypass pipe 1 to fix it to the second fixing plate 43. Both the first fixing plate 41 and the second fixing plate 42 are straight strips arranged in two mutually perpendicular planes. One side of the first fixing plate 41 is connected to one side of the second fixing plate 42. The first fixing plate 41 is fixedly connected to the intercooler 5, with one end fixed to the intercooler 5 via a connector. The second fixing plate 42 is connected to the fixing clamps 43 to fix the bypass pipe 1 to the back of the intercooler 5. The end of the second fixing plate 42 connected to the fixing clamps 43 is away from the end of the first fixing plate 41 connected to the intercooler 5. Multiple fixing clamps 43 are evenly fitted over the bypass pipe 1, increasing the installation stability of the bypass pipe 1.

[0026] The engine intake system also includes a transition joint 2, which is installed at both ends of the bypass pipe 1. The bypass pipe 1 is tightly connected to the connecting seat 3 on the intercooler 5 through the transition joint 2 to ensure that there is no air leakage in the pipeline. The bypass pipe 1 has a simple pipeline structure, does not use complicated processing technology, and is easy to install and manufacture; at the same time, the bypass pipe 1 is located on the side of the intercooler 5 opposite to the exhaust pipe 7, with ample installation space.

[0027] In summary, the engine intake system provided by the above-described embodiments of this utility model includes at least two turbochargers 8, at least two intercoolers 5, two intake pipes 6, two exhaust pipes 7, a bypass pipe 1, and multiple fixing structures 4. The two ends of the bypass pipe 1 are connected to the connecting seat 3 via transition joints 2, and the middle portion is fixed to one side of the intercooler 5 by fixing clamps 43. The bypass pipe 1 is fixedly installed on the intercooler 5 by multiple fixing structures 4, ensuring the stability of the bypass pipe 1 connection. The bypass pipe 1 can connect the two exhaust pipes 7, balancing the pressure on both sides of the exhaust pipes 7. Furthermore, the connection point is close to the intake manifold 9 of the engine 10, reducing the resistance caused by airflow through the intercooler 5, further ensuring consistent intake pressure on both sides of the engine 10, thereby improving the combustion efficiency and operational stability of the engine 10.

[0028] like Figure 1 As shown, another embodiment of this utility model provides an engineering machine 11, including the aforementioned engine intake system and engine 10. The exhaust pipe 7 of the engine intake system is connected to the combustion chamber of the engine 10 to deliver air after passing through the intercooler 5 to the engine 10 for reaction. Further, the cooling type of the engine 10 is preferably an air-to-air intercooling type, with at least two turbochargers 8 mounted on the engine. The engine 10 includes at least two intake manifolds 9, which are connected to the combustion chamber of the engine 10. At least two exhaust pipes 7 are respectively connected to the combustion chamber of the engine 10 through the at least two intake manifolds 9. In a further embodiment, a bypass pipe 1 can also be connected between the two intake manifolds 9 of the engine 10, which can also achieve the effect of balancing the intake pressure of the engine 10.

[0029] Outside air first enters the turbocharger 8 of the intake system. After being pressurized by the turbocharger 8, the pressurized airflow enters the intercooler 5 through the intake manifold 6 for cooling. Most of the cooled airflow is discharged from the intercooler 5 through the exhaust manifold 7, while the remaining small portion flows between the two exhaust manifolds 7 through the bypass pipe 1 to balance the air pressure. The cooled airflow is then delivered to the combustion chamber of the engine 10 through the exhaust manifold 7 and the intake manifold 9 to participate in combustion. The airflow pressure reaches uniformity in the exhaust manifold 7, which is equivalent to the uniform intake pressure entering the engine 10. Furthermore, the connection position of the bypass pipe 1 can reduce the influence of the intercooler 5 on the pressure. Therefore, the addition of the bypass pipe 1 can ensure that the intake pressure of the engine 10 remains balanced, thereby improving combustion efficiency and operational stability.

[0030] In summary, another embodiment of this utility model provides an engineering machinery 11, including the aforementioned engine intake system and engine 10. Engine 10 includes an intake manifold 9, and the exhaust pipe 7 of the engine intake system is connected to the combustion chamber of engine 10 via the intake manifold 9. By adding a bypass pipe 1 between the exhaust pipes 7, the intake pressure delivered to engine 10 is made consistent, improving the combustion efficiency and operational stability of engine 10, thereby improving the efficiency and stability of engineering machinery 11. Furthermore, the bypass pipe 1 has a simple structure and is securely mounted on the intercooler 5 via a fixing structure 4, which facilitates the manufacturing and assembly of the bypass pipe 1, thereby reducing the manufacturing cost of engineering machinery 11.

[0031] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. An engine intake system, characterized in that, The system includes at least two turbochargers for generating pressurized airflow, at least two intercoolers corresponding to the at least two turbochargers, at least two intake pipes, and at least two exhaust pipes. The intake pipes are connected between the corresponding turbochargers and the intercoolers, and the exhaust pipes are used to connect the intercoolers to the engine, so that the pressurized airflow is delivered to the engine through the intake pipes, the intercoolers, and the exhaust pipes. The engine intake system also includes a bypass pipe that connects the at least two intercoolers to each other to balance the internal pressure of the at least two intercoolers.

2. The engine intake system as described in claim 1, characterized in that, The intake pipe and the outlet pipe are located on the same side of the intercooler, and the bypass pipe is located on the side of the intercooler opposite to the outlet pipe.

3. The engine intake system as described in claim 1, characterized in that, The intercooler has a connecting seat on the side opposite to the outlet pipe for connecting the end of the bypass pipe to the intercooler, and the connecting seat is aligned with the inlet of the outlet pipe into the intercooler.

4. The engine intake system as described in claim 3, characterized in that, The exhaust pipe has an exhaust manifold at one end near the intercooler, and the exhaust manifold passes through the connector and communicates with the bypass pipe.

5. The engine intake system as described in claim 1, characterized in that, It also includes a fixing structure for fixing the bypass pipe, the fixing structure including a first fixing plate and a second fixing plate, the first fixing plate and the second fixing plate are both straight strips and are respectively arranged in two mutually perpendicular planes, one side of the first fixing plate is connected to one side of the second fixing plate; the end of the first fixing plate is fixedly connected to the intercooler.

6. The engine intake system as described in claim 5, characterized in that, The fixing structure also includes a fixing clamp for fixing the bypass pipe to the second fixing plate. The fixing clamp is sleeved on the outside of the bypass pipe and connected to the second fixing plate.

7. The engine intake system as described in claim 3, characterized in that, The bypass pipe is provided with transition joints at both ends, and is connected to the connecting seat through the transition joints.

8. An engineering machinery, characterized in that, Includes the engine intake system and engine as described in claim 1, wherein the exhaust pipe is connected to the combustion chamber of the engine.

9. The engineering machinery as described in claim 8, characterized in that, The engine includes at least two intake manifolds, and the at least two exhaust manifolds are respectively connected to the combustion chamber of the engine through the at least two intake manifolds.

10. The engineering machinery as described in claim 9, characterized in that, The bypass pipe is connected to each of the at least two intake manifolds.

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