CN106812634B - Integrated EGR valve structure on plastic intake manifold - Google Patents

Abstract

The invention discloses an EGR valve structure integrated on a plastic intake manifold, which is located on the side of the intake manifold. The EGR valve includes a regulating mechanism, a steering mechanism and an inlet pipe interface, and also includes an EGR mixing pipe. The EGR mixing pipe includes a connecting pipe and The mixing pipe integrated with the connecting pipe, the side wall of the connecting pipe is provided with air intake holes to communicate with the branches of the intake manifold, the steering mechanism is located inside the mixing pipe, and the regulating mechanism adjusts the rotation angle of the steering mechanism, thereby adjusting the EGR valve to enter into the The air volume of the intake manifold; the regulating mechanism is set between the two branches of the intake manifold, and the steering mechanism and the intake pipe interface are connected through pipes. The invention has the advantages of reducing the connecting pipeline between the EGR valve and the intake manifold and reducing the production cost; the steering mechanism is arranged in the mixing pipe, and the regulating mechanism is arranged between the two branch pipes of the intake manifold, thereby reducing the cabin space.

Description

A plastic intake manifold integrated EGR valve structure

technical field

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

Background technique

At present, the method of reducing the fuel consumption of the whole vehicle has become the focus of attention of major automobile manufacturers. Among them, the low-pressure cooling EGR technology is a measure used to effectively reduce the fuel consumption of the supercharged engine. The so-called low-pressure cooling EGR technology of the supercharged engine is to draw the exhaust gas after combustion from the rear end of the exhaust pre-catalyst in a special water cooling system. After cooling, it is mixed with fresh air and then introduced into the supercharger for pressurization, and finally introduced into the combustion chamber for re-combustion. The low-pressure cooling EGR technology can significantly reduce the fuel consumption of the engine.

The temperature of the cooled EGR exhaust gas can reach a maximum of 200~300°C. If the EGR exhaust gas is not pre-mixed with fresh air and directly introduced into the supercharger for supercharging, the local high-temperature exhaust gas may damage the compressor blades of the supercharger. At the same time, if the air flow at the intersection of exhaust gas and fresh air is disturbed, the gas flow resistance will increase, affecting the mixing and distribution of exhaust gas and fresh air, and ultimately affecting the combustion effect of the engine and the accuracy of fuel injection in each cylinder. The direct consequences will be As a result, this technology cannot achieve the purpose of reducing fuel consumption, but also increases fuel consumption, deteriorates combustion, and reduces engine performance.

At present, the Chinese patent announcement number CN201778916U, the utility model patent disclosed on March 30, 2011 discloses an engine EGR mixing pipe, which is used to discharge engine exhaust gas into the intake pipe, and the mixing pipe and the intake pipe are vertically arranged , and the mixing tube is inserted into the hole opened at the corresponding position of the intake joint and fixed, the mixing tube extends to 1/4 to 1/2 of the pipe diameter of the intake joint, and multiple mixing tubes are evenly arranged at the end of the insertion part of the mixing tube The pipe hole, the pipe diameter of the intake pipe at the insertion position of the mixing pipe is larger than the pipe diameter of other positions of the air intake pipe, so as to avoid the reduction of the air flow area caused by the insertion of the mixing pipe. However, this device is not convenient for processing and molding, and takes up a large space, and the gas is not easy to form a vortex in the mixing chamber, which easily leads to uneven mixing in the central part of the spiral channel, so that the power performance of the engine cannot reach the best state.

In order to solve the problems of many EGR system pipelines in the prior art, a large space occupied by the engine compartment, and uneven distribution of the mixed gas, it is necessary to design a plastic intake manifold with an integrated EGR valve structure.

Contents of the invention

The present invention aims to solve the gap in the integrated structure of the EGR valve in the prior art. The EGR system has many pipelines and the engine compartment takes up a large space. It provides an integrated EGR valve structure on the plastic intake manifold, which can reduce the space of the engine compartment and reduce the EGR. The valve is connected to the intake manifold.

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

An EGR valve structure integrated on the plastic intake manifold, located on the side of the intake manifold, the EGR valve includes a control mechanism, a steering mechanism and an intake pipe interface, and also includes an EGR mixing pipe, the EGR mixing pipe includes a connecting pipe and is integrated with the connecting pipe The side wall of the connecting pipe is provided with air intake holes to communicate with the various branches of the intake manifold. The steering mechanism is located inside the mixing pipe. The control mechanism adjusts the angle of the steering mechanism, thereby adjusting the EGR valve to enter the intake manifold. The amount of air; the regulating mechanism is set between the two pipes of the intake manifold, and the steering mechanism and the inlet pipe interface are connected through pipes.

The mixed gas entering the branch pipe of the intake manifold is distributed through the EGR mixing tube, reducing the connection pipeline between the EGR valve and the intake manifold, and reducing production costs; the steering mechanism is set in the mixing tube, and the control mechanism is set in the intake manifold. Between the two pipes of the pipe, the cabin space is reduced.

Preferably, the mixing pipe is arranged at a position away from the intake port of the intake manifold, so as to form an L-shaped structure with the communication pipe. The air velocity near the intake port of the intake manifold is high and the suction force is strong. The distance between the mixing tube and the intake port of the intake manifold is beneficial for the intake manifold to suck the mixed gas in the connecting tube into all the branches of the intake manifold, thereby Ensure that the mixture can be evenly distributed to each cylinder of the engine.

Preferably, the side wall of the intake manifold is provided with a set screw post, and one side of the regulating mechanism of the EGR valve is fixed on the set screw post by a set screw. Complete the fixation so that the EGR valve is located between the branch pipes of the intake manifold, saving the space in the engine compartment.

Preferably, each branch pipe of the intake manifold is provided with a casing, and the casing casing is provided with an extension hole at a position corresponding to the air intake hole, and the cross section of the connecting pipe is rectangular. The installation of the EGR mixing pipe is convenient, and at the same time, it is easy to ensure the sealing between the EGR mixing pipe and the intake manifold.

Preferably, the height of the connecting pipe is smaller as it is farther away from the connecting pipe from the end connected to the mixing pipe. The height of the connecting pipe gradually decreases from the mixing pipe to the height of both sides to ensure that the mixed gas flow rate near several air intake holes is close, and the mixed gas is evenly distributed into the branch pipe of the intake manifold through the air inlet holes in the connecting pipe , so as to ensure that the combustion efficiency in the engine cylinder is close to that of the engine, ensure the stable operation of the car, and prolong the life of the engine.

Preferably, a screw column is arranged in the mixing tube, and the steering mechanism of the EGR valve is fixed on the mixing tube by vertically symmetrical screws. Complete the integrated fixation of the EGR valve.

Preferably, the width of the connecting pipe is the diameter of the air inlet plus 1 to 2 mm, and an arc-shaped blocking protrusion is provided between the air inlet and the mixing pipe on the lower side of the mixing pipe. The mixed gas is blocked to prevent the mixed gas that has just entered the EGR mixing connecting pipe from directly entering the intake manifold from the first air intake hole, which is conducive to the even distribution of the mixed gas among the branches of the intake manifold. It facilitates the flow of mixed gas into each air intake hole, and enters the corresponding intake manifold branch pipe from the air intake hole.

Preferably, a number of reinforcing ribs are respectively provided on both sides of the mixing tube connected to the position of the EGR valve. An EGR valve is arranged in the mixing pipe, and the strength near the mixing pipe is enhanced by reinforcing ribs so as to complete the support for the EGR valve.

The invention is beneficial in that the space between the two branch pipes can be reduced, the connection pipeline between the EGR valve and the intake manifold can be reduced, and the production cost can be reduced.

Description of drawings

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

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

In the figure: EGR mixing pipe 1 mixing pipe 11 reinforcing rib 111 connecting pipe 12 air intake hole 121 blocking protrusion 122 EGR valve 2 steering mechanism 21 intake pipe interface 22 control mechanism 23 set screw post 231 casing 3 intake manifold 4 .

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

An EGR valve structure integrated on a plastic intake manifold, located on the side of the intake manifold 4, the EGR valve 2 includes a control mechanism 23, a steering mechanism 21, and an intake pipe interface 22, and also includes an EGR mixing tube 1, and the EGR mixing tube 1 includes The connecting pipe 12 and the mixing pipe 11 integrated with the connecting pipe 12, the side wall of the connecting 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 located inside the mixing pipe 11, and the control mechanism 23 Direct current motor control is used to adjust the rotation angle of the steering mechanism 21 through gear transmission, so as to adjust the amount of air entering the intake manifold 4 from the EGR valve 2; the steering mechanism 21 and the intake pipe interface 22 are connected through a pipeline. The mixing pipe 11 is arranged at a position away from the intake port of the intake manifold 4 , that is, at the leftmost end of the communicating pipe 12 so as to form an L-shaped structure with the communicating pipe 12 . The side wall of the intake manifold 4 is provided with a set screw column 231, and one side of the control mechanism of the EGR valve 2 is fixed on the set screw column 231 by the set screw, so that the control mechanism 23 is arranged between the two branches of the intake manifold 4 between. Each branch pipe of the intake manifold 4 is provided with a sleeve shell 3, and the sleeve shell 3 is provided with an extension hole corresponding to the position of the air intake hole 121, and the cross section of the connecting pipe 12 is rectangular. The farther the communication pipe 12 is from the leftmost end connected to the mixing pipe 11, the smaller the height is. The mixing tube 11 is provided with a screw column, and the steering mechanism of the EGR valve 2 is fixed on the mixing tube 11 through upper and lower symmetrical screws, and a symmetrical reinforcing rib 111 is provided near the screw connecting the EGR valve 2 and the mixing tube 11 to strengthen the connection of the screw. reliability. The EGR mixing pipe 1 is integrally formed by means of a mold. The bottom side wall where the EGR mixing tube 1 and the intake manifold 4 are bonded extends outward by 2 mm to increase the connection area between the EGR mixing tube 1 and the intake manifold 4 . The width of the connecting pipe 12 is the diameter of the air inlet 121 plus 2 mm, and an arc-shaped blocking protrusion 122 is arranged between the air inlet 121 on the lower side of the mixing pipe 11 and the mixing pipe. Three pairs of reinforcing ribs 111 are provided on both sides of the mixing pipe 11 where the EGR valve 2 is connected.

Claims (6)

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.

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