阅读说明：本技术 一种用于degr系统的新型排气歧管 (Novel exhaust manifold for DEGR system ) 是由 黄新周 王春玲 陈晓克 吴剑辉 于 2020-04-14 设计创作，主要内容包括：本发明属于发动机后处理领域,具体涉及一种用于DEGR系统的新型排气歧管,包括管体,以及沿着管体轴向并列连接在管体一侧的第一排气入口和第二排气入口,第一排气入口设置在管体的轴向端部,第一排气入口的另一端连通有EGR取气口,第一排气入口和与其相邻的第二排气入口之间设置有连接管体的排气出口,管体的内腔设置有将管体内腔分割成相互隔绝的第一腔体和第二腔体的隔板。本发明的排气歧管为一整体结,零件及模具通用性好,成本低。(The invention belongs to the field of engine aftertreatment, and particularly relates to a novel exhaust manifold for a DEGR system, which comprises a pipe body, a first exhaust inlet and a second exhaust inlet, wherein the first exhaust inlet and the second exhaust inlet are connected to one side of the pipe body in parallel along the axial direction of the pipe body, the first exhaust inlet is arranged at the axial end part of the pipe body, the other end of the first exhaust inlet is communicated with an EGR gas taking port, an exhaust outlet connected with the pipe body is arranged between the first exhaust inlet and the second exhaust inlet adjacent to the first exhaust inlet, and a partition plate for dividing an inner cavity of the pipe body into a first cavity and a second cavity which are mutually isolated is arranged in the inner. The exhaust manifold is an integral structure, and has good universality of parts and dies and low cost.)

1. A novel exhaust manifold for a DEGR system, comprising a pipe body (1), and a first exhaust gas inlet (2) and a second exhaust gas inlet (3) which are axially connected in parallel along the pipe body (1) at one side of the pipe body (1), wherein the number of the second exhaust gas inlets (3) is more than 1, and the novel exhaust manifold is characterized in that: first exhaust inlet (2) set up the axial tip of body (1), be provided with on body (1) with EGR of first exhaust inlet (2) intercommunication gets gas mouth (4), be provided with between first exhaust inlet (2) and rather than adjacent second exhaust inlet (3) and connect exhaust outlet (5) of body (1), the inner chamber of body (1) is provided with body (1) inner chamber is cut apart into baffle (6) of first cavity (101) and second cavity (102) of mutual isolation, first cavity (101) intercommunication first exhaust inlet (2) and EGR get gas mouth (4), second cavity (102) intercommunication second exhaust inlet (3) with exhaust outlet (5).

2. The novel exhaust manifold for a DEGR system of claim 1, wherein: and the EGR gas taking port (4), the first exhaust inlet (2) and the outer end of the second exhaust inlet (3) are both provided with connecting flanges.

3. The novel exhaust manifold for a DEGR system of claim 2, wherein: the EGR gas taking port (4), the first exhaust inlet (2) and the flange surface of the outer end of the second exhaust inlet (3) provided with the connecting flange are all positioned on the same plane.

4. The novel exhaust manifold for a DEGR system of claim 1 or 2, wherein: the exhaust pipe is characterized in that the pipe body (1), the first exhaust inlet (2) and the second exhaust inlet (3) are integrally formed.

5. The novel exhaust manifold for a DEGR system of claim 1 or 2, wherein: the included angle between the partition plate (6) and the cross section of the pipe body (1) is 30-45 degrees.

6. The novel exhaust manifold for a DEGR system of claim 1 or 2, wherein: the central connecting line of the first exhaust inlet (2) and the second exhaust inlet (3) is parallel to the axis of the pipe body (1).

Technical Field

The invention belongs to the field of engine aftertreatment, and particularly relates to a novel exhaust manifold for a DEGR system.

Background

EGR technology is widely used and engine systems may be configured with a single Dedicated Exhaust Gas Recirculation (DEGR) cylinder for providing external EGR to all engine cylinders. Degr system

An exhaust pipe of one cylinder and exhaust pipes of other remaining cylinders; for example, chinese patent CN107387270A discloses an engine with an adjustable DEGR system, which includes an intake system and an exhaust system, wherein the intake system includes an intake main pipe and an intake manifold connected to each cylinder, the cylinder is divided into a first cylinder and a second cylinder, the exhaust system includes a first exhaust manifold communicated with a first working cylinder and a second exhaust manifold communicated with a second cylinder, and a control valve is disposed below the second exhaust manifold for controlling exhaust gas to be selectively communicated to a supercharger turbine or the intake system.

The part quantity of above-mentioned structure increases, and the DEGR system need add an exhaust pipe and independently get gas from the exhaust inlet of the special cylinder of one, and the exhaust pipe quantity is two, and part and mould commonality are poor, and development cost is high. And a special structure is adopted, so that the method is not universal with other non-DEGR systems, and the development cost is high.

Disclosure of Invention

The invention provides a novel exhaust manifold for a DEGR system, which is an integral structure, has good part and mould universality and low cost.

The technical scheme of the invention is as follows: a novel exhaust manifold for a DEGR system comprises a pipe body, a first exhaust inlet and a second exhaust inlet which are connected to one side of the pipe body in parallel along the axial direction of the pipe body, wherein the number of the second exhaust inlets is more than 1, the number of the second exhaust inlets is less than that of engine cylinders, the first exhaust inlet is arranged at the axial end part of the pipe body, an EGR gas taking port communicated with the first exhaust inlet is arranged on the pipe body, the EGR gas taking port and the first exhaust inlet are both positioned at the same end of the pipe body, an exhaust outlet connected with the pipe body is arranged between the first exhaust inlet and the second exhaust inlet adjacent to the first exhaust inlet, a partition plate for dividing the inner cavity of the pipe body into a first cavity and a second cavity which are mutually isolated is arranged in the inner cavity of the pipe body, and the first cavity is communicated with the first exhaust inlet and the EGR gas taking port, the second cavity communicates the second exhaust inlet and the exhaust outlet.

All exhaust inlets and exhaust outlets are connected to the pipe body, the intake manifold is of an integral structure, and the DEGR cylinder for independently taking gas is designed to be the first or last cylinder, namely, the cylinder connected with the first exhaust inlet is designed to be the first or last cylinder, and the first exhaust inlet is connected with other cylinders. Thus, an integrally formed partition plate is designed between the first cylinder or the last cylinder for taking the EGR gas and other cylinders, so that the cylinders are separated from each other, and the exhaust gas is not influenced; by cavity die tuning, exhaust manifolds can be developed that have the same appearance structure for non-DEGR systems.

The exhaust manifold can be transformed from the exhaust manifold of the non-DEGR system, the design and manufacturing cost is low, namely, the partition plate can be adjusted by the inner cavity die and simultaneously applied to the DEGR system and the non-DEGR system, and can be adjusted by the inner cavity die to share with other non-DEGR systems, the development cost is reduced, the number of parts is small, and the structure is simple;

therefore, the exhaust manifold is an integral structure, and has good universality of parts and dies and low cost.

Preferably, the EGR gas taking port, the first exhaust inlet and the outer end of the second exhaust inlet are provided with connecting flanges, the structure is simple, and the compactness is good.

Preferably, the EGR gas intake port, the first exhaust gas inlet, and the second exhaust gas inlet have flange surfaces provided with connecting flanges on the same plane. The mounting flange surfaces of the three parts can be processed at one time, so that the processing efficiency is improved, and the cost is reduced; in addition, the design mode can also enable the arrangement of the EGR gas taking port connecting pipe or the EGR gas taking channel to be more compact.

Preferably, body, first exhaust inlet and second exhaust inlet integrated into one piece, can adopt integrative casting to mould, it is with low costs.

Preferably, the baffle with the contained angle of the cross section of body is 30 ~ 45, and the inclination of baffle can make at this angle scope the air current between second exhaust inlet and the exhaust outlet is more smooth and easy, reduces flow resistance.

Preferably, the central connecting line of the first exhaust inlet and the second exhaust inlet is parallel to the axis of the pipe body, so that design and processing are facilitated, and cost is reduced.

The invention has the beneficial effects that:

1. the partition plate can be adjusted by the inner cavity mold and simultaneously applied to the DEGR system and the non-DEGR system, and can be adjusted by the inner cavity mold to be shared with other non-DEGR systems, so that the universality of parts and molds is good, and the development cost is reduced;

2. the pipe body is connected with all the exhaust inlets and the exhaust outlets, and the air inlet manifold is of an integral structure, simple and compact in structure, less in part number and simple in structure.

Drawings

FIG. 1 is a schematic diagram of a novel exhaust manifold for a DEGR system according to the present invention.

FIG. 2 is an external block diagram of a novel exhaust manifold for a DEGR system according to the present invention.

In the figure: 1-pipe body, 101-first cavity, 102-second cavity, 2-first exhaust inlet, 3-second exhaust inlet, 4-EGR gas taking port, 5-exhaust outlet and 6-partition plate.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.