Engine EGR pipe

Technical Field

The utility model relates to an engine exhaust gas recirculation EGR pipe.

Background Art

As the environmental problems are becoming more and more severe and rapid increasing number of automobiles, the relevant energy saving and emission reduction of more stringent laws and regulations. Gasoline engine by introducing the external exhaust gas recirculation EGR, pumping loss can be effectively reduced, reducing the original emission NOx. The structure of the engine itself and the external space of the structure, at the same time the introduction of the EGR amount of each cylinder is uniform and the overall relatively high EGR rate, which is relatively difficult. Such as China Patent application number 201220030557.6 discloses an engine EGR intake distributing plate, the distributing plate the same shape as the upper plate and distribution under board board , distribution plate and the lower plate and the upper plate is provided with a proper distribution of air distribution of EGR, the EGR distribution on the distribution plate and a sensor of the engine air inlet hole and is communicated with the air outlet of the EGR, EGR gas through the distribution passage to each cylinder the exhaust gas recirculation is carried out, so as to cancel the air inlet side of the EGR pipe arrangement, reduces the annex to the arrangement space, the cylinder intake EGR distribution of the exhaust gas recirculation is carried out in the form of, the intake manifold heat, prevent thermal deformation of the intake manifold. However, the utility model is not according to the actual demand for each cylinder the intake air amount of the cylinder exhaust gas EGR.

Content of the utility model

The purpose of the utility model is to provide an engine exhaust gas recirculation EGR pipe, solves the problems of the prior engine exhaust gas recirculation EGR tube can not according to each cylinder air inlet for adjustment of the size of the waste gas flow rate EGR.

The utility model to solve the technical problems, the invention adopts the technical scheme is:a kind of engine exhaust gas recirculation EGR pipe, comprises a pipe body, the pipe body is arranged in the inner cavity of the pipeline is divided into an upper cavity and a lower cavity of the baffle, the baffle is provided with a group of holes; the lower cavity is connected with the EGR exhaust gas inlet end, the upper cavity is provided with a gas outlet port.

Preferably, the upper cavity of the air outlet is connected with the intake manifold of the engine.

Furthermore, the upper cavity is provided with a group of connected pipe the developer of the intake manifold of the engine.

Different intake manifold to meet the demand to the requirements of the exhaust gas EGR, the number of the air holes on the partition board, the size and the position of the intake manifold of the engine exhaust gas EGR is adapted to the demand.

In order to further improve access to the intake manifold in the precision of the EGR gas, the upper cavity chamber is arranged between the two adjacent the air outlet of a vertical plate.

The beneficial effects of the utility model: if the pipeline is provided with a hole on the body of the baffle, the baffle is different according to the need of setting up the air vent position, and the number and size of the air vent can also be according to the requirements of the intake manifold to adjust, meet the requirements of the different intake manifold, and the structure is simple, the occupied space is small. Pipeline body directly through the branch pipe is connected with the intake manifold, the structure is compact, and can ensure the EGR in the intake manifold of the waste gas can fully enter into the respective air intake manifold. The riser can further improve access to the intake manifold in the precision of the EGR gas.

The following Figures and embodiment of the combination, the utility model relates to a more detailed description.

Description of drawings

Figure 1 is a schematic diagram of the utility model the assembly.

Figure 2 is an elevational view of the baffle.

Figure 3 is a cross-sectional view of pipe body.

Mode of execution

Embodiment 1:

As shown in Figure 1, Figure 2 shows, an engine exhaust gas recirculation EGR pipe, comprises a pipe main body 1, the pipe body 1 is provided with baffle 2, the baffle plate 2 is divided into the inner cavity of the pipeline the upper cavity 4 and a lower cavity 5 the two parts, the partition 2 is provided with a group of air holes 3 ; the lower cavity 5 is connected with the EGR exhaust gas inlet end, the upper cavity 4 is provided with a gas outlet port. The the upper cavity 4 through a group of the gas outlet of the branch pipe 6 and the engine each intake manifold 8 is connected. EGR gas from the EGR exhaust gas inlet into the lower cavity 5, through a baffle plate 2 of 3 to enter the upper cavity 4, and then the branch pipe 6 into the respective intake manifold 8 in.

The baffle plate 2 holes on 3 the number of, can be according to engine size and the position of the intake manifold 8 to determine demand of the exhaust gas EGR, so as to ensure that the different intake manifold 8 to the needs of the EGR gas, the structure is simple, convenient adjustment.

Embodiment 2:

As shown in Figure 1 to 3 is shown, the pipe body 1 upper chamber 4 in between two adjacent air outlet is provided with a vertical plate 7, vertical plate 7 of the upper chamber is divided into a group of mutually independent cavity, through the hole 3 into the upper cavity 4 of the exhaust gas in EGR do not interfere with each other, to the intake manifold is more convenient 8EGR the control of the exhaust. Other with embodiment 1.