CN106812634B

CN106812634B - Integrated EGR valve structure on plastic intake manifold

Info

Publication number: CN106812634B
Application number: CN201710060530.9A
Authority: CN
Inventors: 方立锋; 蔡炳芳; 饶聪超; 茅锦鑫
Original assignee: Shentong Technology Group Co Ltd
Current assignee: Shentong Technology Group Co Ltd
Priority date: 2017-01-25
Filing date: 2017-01-25
Publication date: 2022-11-22
Anticipated expiration: 2037-01-25
Also published as: CN106812634A

Abstract

The invention discloses an integrated EGR valve structure on a plastic intake manifold, which is positioned on the side surface of the intake manifold, wherein the EGR valve comprises a regulating mechanism, a steering mechanism and an intake pipe interface, and also comprises an EGR mixing pipe, the EGR mixing pipe comprises a communicating pipe and a mixing pipe integrated with the communicating pipe, the side wall of the communicating pipe is provided with an air inlet so as to communicate with each branch pipe of the intake manifold, the steering mechanism is arranged in the mixing pipe, and the regulating mechanism regulates the rotation angle of the steering mechanism so as to regulate the air quantity entering the intake manifold from the EGR valve; the regulating mechanism is arranged between the two branch pipes of the air inlet manifold, and the steering mechanism is connected with the air inlet pipe connector through a pipeline. The invention has the advantages that the connecting pipeline of the EGR valve and the intake manifold is reduced, and the production cost is reduced; the steering mechanism is arranged in the mixing pipe, and the regulating mechanism is arranged between the two branch pipes of the air inlet manifold, so that the space of the engine room is reduced.

Description

Integrated EGR valve structure on plastic intake manifold

Technical Field

The invention relates to the technical field of intake manifolds, in particular to an integrated EGR valve structure on a plastic intake manifold.

Background

Currently, methods for reducing the fuel consumption of the whole automobile become the focus of attention of various automobile manufacturers. The supercharged engine low-pressure cooling EGR technology is a process that exhaust gas after being led out and combusted at the rear end of an exhaust pre-stage catalyst is cooled in a special water-cooled intercooler, is mixed with fresh air after being cooled, is led into a supercharger for pressurization and is finally led into a combustion chamber for reburning, and the fuel consumption of the engine can be remarkably reduced through the low-pressure cooling EGR technology.

The cooled EGR waste gas has the highest temperature of more than 200-300 ℃, if the EGR waste gas and fresh air are not premixed and are directly led into a supercharger for supercharging, local high-temperature waste gas can damage the blades of a compressor of the supercharger, and meanwhile, if the air flow at the intersection position of the waste gas and the fresh air is disordered, the gas flow resistance is increased, the mixing and distribution of the waste gas and the fresh air are influenced, the combustion effect of an engine and the accuracy of fuel oil of each cylinder are finally influenced, the oil consumption cannot be reduced by the technology due to direct consequences, the oil consumption is increased, the combustion is deteriorated, and the performance of the engine is reduced.

At present, chinese patent publication No. CN201778916U, the utility model discloses an engine EGR mixing tube, a utility model patent that the publication date is 2011 3 month 30, be arranged into the takeover that admits air with engine exhaust gas, the mixing tube sets up with admitting air perpendicularly, and the mixing tube inserts in the hole of seting up in the relevant position department of the takeover that admits air and fixes, the mixing tube extends to the pipe diameter department of the takeover that admits air 1/4 to 1/2, the end of mixing tube inserted part evenly sets up a plurality of mixed tube holes, the pipe diameter of the takeover that admits air in the mixing tube inserted position is greater than the pipe diameter of the takeover other positions that admits air, in order to avoid reducing the air current flow area because of the insertion of the mixing tube leads to. However, the device is inconvenient to machine and form, occupies a large space, and gas is not easy to form vortex in the mixing cavity, so that uneven mixing of the central part of the spiral channel is easy to cause, and the power performance of the engine cannot reach the optimal state.

In order to solve the defects that an EGR system in the prior art has a plurality of pipelines, an engine cabin occupies a large space and the distribution of mixed gas is uneven, the design of the integrated EGR valve structure on the plastic intake manifold is necessary.

Disclosure of Invention

The invention provides an integrated EGR valve structure on a plastic intake manifold, which can reduce the space of an engine cabin and reduce connecting pipelines of an EGR valve and the intake manifold.

In order to achieve the above object, the present invention adopts the following technical solutions.

An integrated EGR valve structure on a plastic intake manifold is positioned on the side surface of the intake manifold, the EGR valve comprises a regulating mechanism, a steering mechanism, an intake pipe interface and an EGR mixing pipe, the EGR mixing pipe comprises a communicating pipe and a mixing pipe integrated with the communicating pipe, the side wall of the communicating pipe is provided with an intake hole so as to communicate with each branch pipe of the intake manifold, the steering mechanism is arranged in the mixing pipe, and the regulating mechanism regulates the rotation angle of the steering mechanism so as to regulate the air quantity entering the intake manifold from the EGR valve; the regulating mechanism is arranged between the two branch pipes of the air inlet manifold, and the steering mechanism is connected with the air inlet pipe connector through a pipeline.

The two mixed gases entering the branch pipes of the intake manifold are distributed through the EGR mixing pipe, so that connecting pipelines of the EGR valve and the intake manifold are reduced, and the production cost is reduced; the steering mechanism is arranged in the mixing pipe, and the regulating mechanism is arranged between the two branch pipes of the air inlet manifold, so that the space of the engine room is reduced.

Preferably, the mixing pipe is provided at a position distant from the intake port of the intake manifold so as to form an L-shaped structure with the communication pipe. The air flow rate near the air inlet of the air inlet manifold is high, the suction force is strong, and the mixing pipe is far away from the air inlet of the air inlet manifold, so that the air inlet manifold can suck the mixed gas in the communicating pipe into the branch pipes of all the air inlet manifolds, and the mixed gas can be uniformly distributed into cylinders of the engine.

Preferably, a positioning screw column is arranged on the side wall of the intake manifold, and one side of the regulating mechanism of the EGR valve is fixed on the positioning screw column through a positioning screw. The fixation is completed, the EGR valve is positioned between the branch pipes of the intake manifold, and the space of the engine compartment is saved.

Preferably, a sleeve shell is arranged outside each branch pipe of the intake manifold, an extending hole is arranged at the position of the sleeve shell corresponding to the air inlet hole, and the cross section of the communicating pipe is rectangular. Make things convenient for the installation of EGR hybrid tube, guarantee the leakproofness between EGR hybrid tube and the air intake manifold easily simultaneously.

Preferably, the communication pipe has a smaller height as it is farther from the communication pipe from the end connected to the mixing pipe. The height of the communicating pipe is gradually reduced from the mixing pipe to the height of the two sides, the flow speed of the mixed gas near the air inlets is ensured to be close, the mixed gas is uniformly distributed into the branch pipes of the air inlet manifold through the air inlets in the communicating pipe, and therefore the combustion efficiency in the engine cylinder is ensured to be close, the stable operation of an automobile is ensured, and the service life of the engine is prolonged.

Preferably, a screw post is provided in the mixing pipe, and the steering mechanism of the EGR valve is fixed to the mixing pipe by vertically symmetrical screws. And completing the integrated fixation of the EGR valve.

Preferably, the width of the communicating pipe is the diameter of the air inlet hole plus 1 to 2mm, and an arc-shaped blocking bulge is arranged between the air inlet hole at the lower side of the mixing pipe and the mixing pipe. The mixed gas is blocked, the mixed gas which just enters the EGR mixing communicating pipe is prevented from directly entering the air inlet manifold from the first air inlet hole, and the mixed gas is favorably and evenly distributed among all branch pipes of the air inlet manifold. The mixture can flow into each air inlet hole and enter into the corresponding branch pipe of the air inlet manifold from the air inlet hole.

Preferably, the mixing pipe is provided with a plurality of reinforcing ribs respectively connected with two sides of the position of the EGR valve. The EGR valve is arranged in the mixing pipe, and the strength near the mixing pipe is enhanced through the reinforcing ribs, so that the support of the EGR valve can be completed.

The invention has the advantages that: the space of an engine compartment can be reduced between the two branch pipes, connecting pipelines of the EGR valve and the intake manifold are reduced, and the production cost is reduced.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a bottom view of fig. 1.

In the figure: EGR mixing pipe 1 mixing pipe 11 stiffening ribs 111 communicating pipe 12 intake apertures 121 blocking projections 122 the EGR valve 2 steering mechanism 21 intake pipe interface 22 adjustment mechanism 23 positioning screw post 231 casing 3 intake manifold 4.

Detailed Description

The invention is further described below with reference to the figures and specific embodiments.

An integrated EGR valve structure on a plastic intake manifold is positioned on the side surface of an intake manifold 4, an EGR valve 2 comprises a regulating mechanism 23, a steering mechanism 21 and an intake pipe connector 22, and further comprises an EGR mixing pipe 1, wherein the EGR mixing pipe 1 comprises a communicating pipe 12 and a mixing pipe 11 integrated with the communicating pipe 12, the side wall of the communicating pipe 12 is provided with an air inlet 121 so as to communicate with each branch pipe of the intake manifold 4, the steering mechanism 21 is arranged in the mixing pipe 11, the regulating mechanism 23 is regulated and controlled by a direct current motor, the rotating angle of the steering mechanism 21 is regulated through gear transmission, and therefore the air quantity entering the intake manifold 4 by the EGR valve 2 is regulated; the steering mechanism 21 and the intake pipe connection 22 are connected by a pipe. The mixing pipe 11 is provided at a position distant from the intake port of the intake manifold 4, i.e., the leftmost end of the communication pipe 12 so as to form an L-shaped structure with the communication pipe 12. The side wall of the intake manifold 4 is provided with a set screw post 231, and one side of the adjustment mechanism of the egr valve 2 is fixed to the set screw post 231 by a set screw, so that the adjustment mechanism 23 is provided between the two branch pipes of the intake manifold 4. A sleeve shell 3 is arranged outside each branch pipe of the intake manifold 4, an extending hole is arranged at the position of the sleeve shell 3 corresponding to the air inlet 121, and the section of the communicating pipe 12 is rectangular. The farther the communication pipe 12 is from the leftmost end connected to the mixing pipe 11 from the communication pipe 12, the smaller the height. The mixing pipe 11 is internally provided with a screw column, the steering mechanism of the EGR valve 2 is fixed on the mixing pipe 11 through screws which are symmetrical up and down, and symmetrical reinforcing ribs 111 are arranged near the screws which are connected with the mixing pipe 11 of the EGR valve 2, so that the reliability of screw connection is enhanced. The EGR mixing pipe 1 is integrally molded by a mold. The bottom side wall that EGR hybrid tube 1 and air intake manifold 4 laminating outwards extend 2mm, increase the area of being connected of EGR hybrid tube 1 and air intake manifold 4. The width of the communicating pipe 12 is the diameter of the air inlet hole 121 plus 2mm, and an arc-shaped blocking protrusion 122 is arranged between the air inlet hole 121 at the lower side of the mixing pipe 11 and the mixing pipe. Three groups of paired reinforcing ribs 111 are respectively arranged on two sides of the mixing pipe 11 connected with the EGR valve 2.

Claims

1. An integrated EGR valve structure on a plastic intake manifold is positioned on the side surface of the intake manifold, the EGR valve comprises a regulating mechanism, a steering mechanism and an intake pipe interface, and is characterized by also comprising an EGR mixing pipe, the EGR mixing pipe comprises a communicating pipe and a mixing pipe integrated with the communicating pipe, the side wall of the communicating pipe is provided with an intake hole so as to communicate with each branch pipe of the intake manifold, the steering mechanism is arranged in the mixing pipe, and the regulating mechanism regulates the rotation angle of the steering mechanism so as to regulate the air quantity entering the intake manifold from the EGR valve; regulating and controlling mechanism establishes between intake manifold's two spinal branch pipes, and steering mechanism and intake pipe interface pass through the pipeline and link to each other, intake manifold's lateral wall is equipped with the set screw post, and one side of regulating and controlling mechanism of EGR valve is passed through set screw and is fixed on the set screw post, the width of communicating pipe is the diameter of inlet port and adds 1 to 2mm, is equipped with convex arch that blocks between inlet port and the hybrid tube of hybrid tube downside.

2. The integrated EGR valve structure in a plastic intake manifold as recited in claim 1, wherein said mixing tube is disposed away from the intake manifold port, thereby forming an L-shaped structure with the communication tube.

3. The structure of the integrated EGR valve on the plastic intake manifold as claimed in claim 1, wherein a sleeve housing is provided outside each branch pipe of the intake manifold, an extension hole is provided at a position of the sleeve housing corresponding to the air inlet hole, and the cross section of the communication pipe is rectangular.

4. The structure of the integrated EGR valve in the plastic intake manifold as recited in claim 1 or 3, wherein the communicating pipe has a smaller height as it is farther from the communicating pipe from the end connected to the mixing pipe.

5. The structure of the integrated EGR valve on the plastic intake manifold as claimed in claim 1, wherein the mixing tube is internally provided with a screw post, and the mixing inner cavity of the EGR valve is fixed on the mixing tube by screws which are symmetrical up and down.

6. The structure of the integrated EGR valve on the plastic intake manifold as recited in claim 1, wherein the mixing tube is provided with a plurality of reinforcing ribs respectively connected with two sides of the position of the EGR valve.