Exhaust pipe integrated with EGR (exhaust gas recirculation) flange on one side and utilizing exhaust pulse energy
By designing a single-sided integrated EGR flange in the diesel engine exhaust pipe and utilizing exhaust pulse energy, the problem of insufficient EGR flow in diesel engines was solved, achieving NOx emission reduction and system simplification, and reducing costs.
Patent Information
- Application Number
- CN202423232466.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-26
AI Technical Summary
When a diesel engine uses a pulse turbocharging system, the EGR flow cannot reach the expected level, resulting in excessive NOx emissions. Furthermore, the engine aftertreatment system requires SCR components, which increases costs.
Design an exhaust pipe with a single-sided integrated EGR flange and utilizing exhaust pulse energy. By setting a connecting hole between the first and second exhaust manifolds, pressure transmission within the exhaust manifold is achieved, ensuring that EGR exhaust gas can be forced into the intake pipe to meet the high-flow EGR requirements.
This technology enables diesel engines to reduce NOx emissions solely through EGR, eliminating the need for SCR components, thus simplifying the system structure and reducing costs.
Smart Images
Figure CN223549336U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of diesel engine technology, specifically, to an exhaust pipe with a single-sided integrated EGR flange that utilizes exhaust pulse energy. Background Technology
[0002] Currently, the turbocharging systems used in the diesel engine industry mainly include constant pressure turbocharging systems and pulse turbocharging systems.
[0003] Constant pressure turbocharging systems have low utilization of exhaust pulse energy in diesel engines, resulting in poor low-speed torque characteristics and acceleration. Diesel engines have large exhaust pipe volumes and minimal internal pressure fluctuations, making the placement of the EGR flange on the exhaust pipe insensitive to its location. Pulse turbocharging systems, on the other hand, have high utilization of exhaust pulse energy in diesel engines, facilitating cylinder exhaust and scavenging. Diesel engines have smaller exhaust pipe volumes and larger internal pressure and airflow fluctuations. Therefore, placing the EGR flange on a single exhaust manifold cannot guarantee the engine's EGR flow rate, significantly impacting exhaust pulse energy. Utility Model Content
[0004] The purpose of this invention is to provide an exhaust pipe with a single-sided integrated EGR flange and utilizing exhaust pulse energy, in order to solve the problem that diesel engines using pulse turbocharger systems cannot achieve the expected EGR flow to reduce NOx emissions.
[0005] To solve the above problems, the present invention adopts the following technical means:
[0006] An exhaust pipe with a single-sided integrated EGR flange and utilizing exhaust pulse energy includes a gas distribution device. The gas distribution device has a first gas passage chamber and a second gas passage chamber built in. The first gas passage chamber is connected to a first exhaust manifold, and the second gas passage chamber is connected to a second exhaust manifold. A plurality of first manifolds are connected side by side to the first exhaust manifold, and a plurality of second manifolds are connected side by side to the second exhaust manifold. An EGR flange is also connected to the first exhaust manifold. The EGR flange is perpendicular to the first manifold. The intake end of the first gas passage chamber has a first intake channel, and the intake end of the second gas passage chamber has a second intake channel. The gas distribution device has a partition that separates the first gas passage chamber and the second gas passage chamber, as well as the first intake channel and the second intake channel. The partition has a horizontally penetrating connecting hole.
[0007] Preferably, the first manifold includes a third cylinder manifold, a second cylinder manifold, and a first cylinder manifold disposed along a distance from the first air passage.
[0008] Furthermore, the first exhaust manifold has a first positioning post on the side opposite to the EGR flange and on the side opposite to the first manifold.
[0009] Furthermore, the second manifold includes a fourth cylinder manifold, a fifth cylinder manifold, and a sixth cylinder manifold disposed along a distance from the second air passage.
[0010] Furthermore, the outer wall of the second exhaust manifold is constructed with a second positioning post.
[0011] Furthermore, the connecting hole is located at the positions of the first air intake channel and the second air intake channel, and the connecting hole connects the first air intake channel and the second air intake channel.
[0012] Furthermore, the connecting hole is an oblong hole.
[0013] This utility model has the following beneficial effects during use:
[0014] The EGR flange is located on the first exhaust manifold, and the engine's EGR exhaust gas is led out through the inner hole of the EGR flange. A connecting hole is provided between the first and second exhaust manifolds, allowing them to communicate. When the engine requires a large flow of EGR exhaust gas, the exhaust pressure in the first exhaust manifold will not be too low, ensuring that the exhaust pressure in the first exhaust manifold is greater than the intake manifold pressure, thus allowing the EGR exhaust gas to be forced into the intake manifold. This solves the problem that diesel engines using pulse turbocharging systems cannot achieve high EGR flow rates to reduce NOx, enabling diesel engines to reduce NOx using only EGR without SCR. This simplifies the engine's aftertreatment system, eliminating the need for SCR components and reducing system costs. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model.
[0016] Figure 2 This is a first-view structural diagram of the present invention.
[0017] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of AA.
[0018] Figure 4 This is a schematic diagram of the second-view structure of the present invention.
[0019] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of BB.
[0020] Among them, 1-gas distribution device, 2-first air passage chamber, 3-second air passage chamber, 4-first exhaust manifold, 5-second exhaust manifold, 6-EGR flange, 7-first intake passage, 8-second intake passage, 9-partition plate, 10-connecting hole, 11-cylinder 3 manifold, 12-cylinder 2 manifold, 13-cylinder 1 manifold, 14-first positioning post, 15-cylinder 4 manifold, 16-cylinder 5 manifold, 17-cylinder 6 manifold, 18-second positioning post. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.
[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0023] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.
[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0026] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0027] Please refer to Figures 1 to 5 As shown, an exhaust pipe with a single-sided integrated EGR flange and utilizing exhaust pulse energy includes a gas distribution device 1. The gas distribution device 1 has a first gas passage chamber 2 and a second gas passage chamber 3. The first gas passage chamber 2 is connected to a first exhaust manifold 4, and the second gas passage chamber 3 is connected to a second exhaust manifold 5. A plurality of first manifolds are connected side by side to the first exhaust manifold 4, and a plurality of second manifolds are connected side by side to the second exhaust manifold 5. An EGR flange 6 is also connected to the first exhaust manifold 4. The EGR flange 6 is perpendicular to the first manifolds. The intake end of the first gas passage chamber 2 is constructed with a first intake channel 7, and the intake end of the second gas passage chamber 3 is constructed with a second intake channel 8. The gas distribution device 1 has a partition 9 that separates the first gas passage chamber 2 and the second gas passage chamber 3, as well as the first intake channel 7 and the second intake channel 8. The partition 9 has a horizontally penetrating connecting hole 10.
[0028] In this way, the EGR flange 6 is arranged on the first exhaust manifold 4, and the engine EGR exhaust gas is led out through the inner hole of the EGR flange 6. A connecting hole 10 is provided between the first exhaust manifold 4 and the second exhaust manifold 5, connecting the first exhaust manifold 4 and the second exhaust manifold 5. The existence of the connecting hole 10 allows the first exhaust manifold 4 and the second exhaust manifold 5 to communicate. When the engine requires a large flow of EGR exhaust gas, the exhaust pressure in the first exhaust manifold 4 will not be too low, ensuring that the exhaust pressure in the first exhaust manifold 4 is greater than the intake manifold pressure, thus allowing the EGR exhaust gas to be forced into the intake manifold. This solves the problem that diesel engines using pulse turbocharging systems cannot achieve a large EGR flow to reduce NOx, enabling diesel engines to reduce NOx using only EGR without SCR, thus eliminating the need for SCR components in the engine aftertreatment system, simplifying the system and reducing costs.
[0029] Specifically, the first manifold includes a third cylinder manifold 11, a second cylinder manifold 12, and a first cylinder manifold 13 disposed along a distance from the first air passage 2.
[0030] The first exhaust manifold 4 has a first positioning post 14 on the side opposite to the EGR flange 6 and on the side opposite to the first manifold.
[0031] The second manifold includes a fourth cylinder manifold 15, a fifth cylinder manifold 16, and a sixth cylinder manifold 17 disposed along a distance from the second air passage 3.
[0032] Furthermore, the outer wall of the second exhaust manifold 5 is constructed with a second positioning post 18.
[0033] In this way, the entire exhaust pipe can be installed and positioned using the first positioning post 14 and the second positioning post 18. For example, installation can be achieved by inserting the first positioning post 14 and the second positioning post 18 into their respective positioning holes.
[0034] Furthermore, in order to avoid the loss of exhaust pulse energy, the connecting hole 10 is located at the position of the first intake channel 7 and the second intake channel 8, and the connecting hole 10 connects the first intake channel 7 and the second intake channel 8.
[0035] Moreover, the connecting hole 10 is an oblong hole.
[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. An exhaust pipe with a single-sided integrated EGR flange and utilizing exhaust pulse energy, characterized in that, The device includes a gas distribution device (1), which has a first gas passage chamber (2) and a second gas passage chamber (3) inside. The first gas passage chamber (2) is connected to a first exhaust manifold (4), and the second gas passage chamber (3) is connected to a second exhaust manifold (5). A number of first manifolds are connected side by side on the first exhaust manifold (4), and a number of second manifolds are connected side by side on the second exhaust manifold (5). An EGR flange (6) is also connected to the first exhaust manifold (4). The EGR flange (6) is perpendicular to the first manifold. The first gas passage chamber (2) has a first intake channel (7) at its intake end, and the second gas passage chamber (3) has a second intake channel (8) at its intake end. The gas distribution device (1) has a partition (9) that separates the first gas passage chamber (2) and the second gas passage chamber (3), as well as the first intake channel (7) and the second intake channel (8). The partition (9) has a horizontally penetrating connecting hole (10).
2. An exhaust pipe with a single-sided integrated EGR flange and utilizing exhaust pulse energy according to claim 1, characterized in that, The first manifold includes a third cylinder manifold (11), a second cylinder manifold (12), and a first cylinder manifold (13) disposed along the first air passage (2) away from the first air passage (2).
3. An exhaust pipe with a single-sided integrated EGR flange and utilizing exhaust pulse energy according to claim 1 or 2, characterized in that, The first exhaust manifold (4) has a first positioning post (14) on the side opposite to the EGR flange (6) and on the side opposite to the first manifold.
4. An exhaust pipe with a single-sided integrated EGR flange and utilizing exhaust pulse energy according to claim 1, characterized in that, The second manifold includes a fourth cylinder manifold (15), a fifth cylinder manifold (16), and a sixth cylinder manifold (17) disposed along the second air passage (3).
5. An exhaust pipe with a single-sided integrated EGR flange and utilizing exhaust pulse energy according to claim 1 or 4, characterized in that, The outer wall of the second exhaust manifold (5) has a second positioning post (18).
6. An exhaust pipe with a single-sided integrated EGR flange and utilizing exhaust pulse energy according to claim 1, characterized in that, The connecting hole (10) is located at the position of the first air intake channel (7) and the second air intake channel (8), and the connecting hole (10) connects the first air intake channel (7) and the second air intake channel (8).
7. An exhaust pipe with a single-sided integrated EGR flange and utilizing exhaust pulse energy according to claim 1 or 6, characterized in that, The connecting hole (10) is a waist-shaped hole.