CN209067333U - Catalytic converter integrates the mounting structure of grain catcher - Google Patents

Abstract

The utility model discloses the mounting structure that a kind of catalytic converter integrates grain catcher, ternary catalyzing unit cavity, bellows, grain catcher cavity including being sequentially connected setting；The bracket institution for being mounted on ternary catalyzing unit cavity on case of transmission is provided on the ternary catalyzing unit cavity, the inlet end of ternary catalyzing unit cavity is connected to enmgine exhaust, and the outlet side of grain catcher cavity is connected to silencer；Mounting structure in the technical program facilitates installation, improves tail gas absorption treatment effeciency, and it is still unaffected to guarantee that engine operation generates tail gas catalyzed conversion in vibration processes.

Description

Installation structure of catalytic converter integrated particle filter

technical field

The invention relates to the field of automotive engine aftertreatment systems, in particular to an installation structure of a catalytic converter integrated particle trap.

Background technique

The catalytic converter is the functional core component of the gasoline engine aftertreatment system. With the gradual tightening of the national emission regulations on automobile emissions, the automobile engine aftertreatment system has also been upgraded and upgraded in accordance with the national emission regulations at various stages. Compared with the national five-stage gasoline engine emission, the national five gasoline engine after-treatment scheme adopts a single-stage or two-stage three-way catalyst scheme, which cannot filter the particulate matter in the exhaust gas through after-treatment. Common China VI engines may have problems such as poor engine cold-start emission performance, low catalytic conversion efficiency, and low particle collection efficiency due to unreasonable design and layout of after-treatment catalytic converters and unreasonable selection of catalytic converter carrier and GPF carrier specifications.

Due to the small weight and low load of light-duty passenger car gasoline engines, integrated devices are generally used for exhaust gas absorption treatment. However, the installation position of passenger cars is small, the vibration generated by engine operation and the low efficiency of catalytic conversion of exhaust gas will affect the exhaust gas absorption treatment. .

Therefore, in order to solve the above problems, there is a need for an installation structure of a catalytic converter integrated with a particle trap, which can be easily installed, improve the efficiency of exhaust gas absorption and treatment, and ensure that the catalytic conversion of exhaust gas remains unaffected during vibration during engine operation.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to overcome the defects in the prior art, and provide an installation structure of a catalytic converter integrated particle trap, which is convenient for installation, improves the efficiency of exhaust gas absorption and treatment, and ensures the catalytic conversion of exhaust gas during the vibration process of engine operation. Still unaffected.

The installation structure of the catalytic converter integrated particle trap of the present invention includes a three-way catalytic converter cavity, a bellows, and a particulate trap cavity that are connected in sequence; The three-way catalytic converter cavity is mounted on a bracket mechanism on the transmission housing, the intake end of the three-way catalytic converter cavity is communicated with the engine exhaust manifold, and the air outlet end of the particle trap cavity is communicated with the muffler.

Further, the included angle formed by the inclination of the three-way catalytic converter cavity and the axial direction is greater than the included angle formed by the inclination of the bellows and the axial direction.

Further, the bracket mechanism includes a transition bracket fixedly connected with the three-way catalytic converter cavity and a cast iron bracket installed on the transition bracket and connected to the transmission housing.

Further, a tapered end cover with smooth transition connection is provided between the three-way catalytic converter cavity and the exhaust manifold.

Further, a flange plate is provided between the bellows and the particle trap cavity for fastening the two.

Further, an oxygen sensor mounting seat is provided between the bellows and the flange, and a pressure sensor mounting seat and a temperature sensor mounting seat are provided on the particle trap cavity.

Further, the air outlet end of the particle trap cavity is provided with a suspension ring for being mounted on the chassis of the vehicle, and the suspension ring is made of rubber material.

Further, the included angle between the three-way catalytic converter cavity and the axial direction is 70-75°, and the included angle between the bellows and the axial direction is 30-40°.

Further, the carrier in the cavity of the three-way catalyst is a honeycomb carrier, the distance between the carrier and the outlet of the exhaust manifold is 50-150mm, the diameter of the carrier is 118.4mm, the pore density is 750 mesh, and the particle catches The carrier of the collector cavity is a wall-flow carrier with a diameter of 132.1mm and a pore density of 300 mesh. The carrier is coated with a specified concentration of precious metal (Pt/Pb/Rh) to ensure that the three-way catalytic conversion efficiency meets the requirements of the engine during normal operation. Design requirements, ensure that the after-treatment particulate matter collection efficiency meets the national VI emission requirements, and assist in the three-way catalytic effect of the engine under high-speed conditions.

The beneficial effects of the present invention are: the installation structure of the catalytic converter integrated particle trap disclosed in the present invention is convenient for installation, improves the efficiency of exhaust gas absorption and treatment, and ensures that the catalytic conversion of exhaust gas remains unaffected during the vibration process of engine operation.

Description of drawings

Below in conjunction with accompanying drawing and embodiment, the present invention is further described:

Fig. 1 is the installation structure schematic diagram of the present invention;

Figure 2 is a top view of the present invention.

reference number

Engine exhaust manifold 1; tapered end cover 2; heat shield 3; cast iron bracket 4; transition bracket 5; catalyst carrier 6; three-way catalyst cavity 7; bellows 8; oxygen sensor mounting seat 9; temperature The sensor mounting seat 10 ; the particle filter carrier 11 ; the particle filter cavity 12 ; the suspension ring 13 ;

Detailed ways

1 is a schematic structural diagram of the present invention, and FIG. 2 is a top view of the present invention. As shown in the figure, it includes a three-way catalytic converter cavity 7, a bellows 8, and a particle trap cavity 12 that are connected in sequence; the three A bracket mechanism for installing the three-way catalytic converter cavity 7 on the transmission housing is provided on the meta-catalyst cavity 7. The intake end of the three-way catalytic converter cavity 7 is communicated with the engine exhaust manifold 1, and the particle trapping is carried out. The outlet end of the collector cavity 12 is communicated with the muffler; the exhaust gas flows into the three-way catalyst cavity 7 through the engine exhaust manifold 1 for sufficient reaction, and the reacted exhaust gas smoothly flows into the bellows 8 and then enters the particle trap. The cavity 12 collects solid particles, and finally flows into the muffler. The bellows 8 is arranged to play an effective connection and transition role. The catalyst has a compact arrangement structure, which is conducive to the rapid increase of the exhaust gas temperature in the catalyst when the engine is cold started. The working temperature of the catalytic converter is 350℃～850℃, which ensures the cold start emission performance of the engine. It adopts a separate catalytic converter and particle trap structure, which has high trapping efficiency. The body 7 and the particle trap cavity 12 can operate independently and are not affected by engine vibration as a whole, are easy to install, and improve the efficiency of exhaust gas absorption and treatment.

In this embodiment, the angle formed by the inclination of the three-way catalyst cavity 7 and the axial direction is greater than the angle formed by the inclination of the bellows 8 and the axial direction; (the axial direction is the horizontal direction in FIG. 1 ) so The angle between the three-way catalyst chamber 7 and the axial direction is 70-75°, and the angle between the bellows 8 and the axial direction is 30-40°. The installation and arrangement of this structure is conducive to the smooth passage of gas from the catalyst chamber. The fluid flows into the collector cavity. The preferred angle between the three-way catalyst cavity 7 and the axial direction is 70°, and the angle between the bellows 8 and the axial direction is 35°, and an installation avoidance space is effectively formed between each structure. , to improve space utilization.

In this embodiment, the bracket mechanism includes a transition bracket 5 fixedly connected to the three-way catalytic converter cavity 7 and a cast iron bracket 4 installed on the transition bracket 5 and connected to the transmission housing. The transition bracket 5 is a bracket with a C-shaped structure, and the cast iron bracket 4 is an L-shaped bracket. One mounting surface of the cast iron bracket 4 is excessively connected with the transition bracket 5 through bolts, and the other mounting surface is provided with a mounting hole for connecting with the transmission housing. , and this installation surface is also provided with a reinforcing rib structure, and a transition bracket 5 is used to connect the cast iron bracket 4 to ensure the connection strength and reliability.

In this embodiment, a tapered end cover 2 that is smoothly transitioned is provided between the three-way catalytic converter cavity 7 and the exhaust manifold 1 . The fluid uniformity is good, the internal reaction is more sufficient, and the exhaust gas conversion efficiency is improved. The surface of the tapered end cover 2 is also covered with a heat shield 3, which effectively avoids contact with other components and plays a good protective role.

In this embodiment, a flange plate for fastening the two is provided between the bellows 8 and the particle trap cavity 12, and the flange plate is used for connection to facilitate the disassembly and replacement of parts.

In this embodiment, an oxygen sensor mounting seat 9 is provided between the bellows 8 and the flange, and a pressure sensor mounting seat 15 and a temperature sensor mounting seat 10 are provided on the particle trap cavity 12 . Multiple sensors can effectively detect the reaction inside the cavity, which is convenient for timely and effective detection and maintenance.

In the present embodiment, the air outlet end of the particle trap cavity 12 is provided with a suspension ring 13 for mounting with the chassis of the vehicle. The suspension ring 13 is made of rubber material, and the suspension ring 13 made of rubber material can effectively avoid the engine vibration belt The influence of the coming, and then improve the exhaust gas absorption effect.

In this embodiment, the carrier inside the three-way catalyst cavity 7 is a honeycomb carrier, the distance between the carrier and the outlet of the exhaust manifold is 50-150mm, the diameter of the honeycomb carrier is 118.4mm, and the pore density is 750 mm. The carrier of the particle trap cavity is a wall-flow carrier, the diameter of the wall-flow carrier is 132.1mm, the pore density is 300 mesh, and the carrier is coated with a specified concentration of precious metal (Pt/Pb/Rh) to ensure the engine During normal operation, the three-way catalytic conversion efficiency meets the design requirements, ensuring that the after-treatment particulate matter replenishment efficiency meets the national VI emission requirements, and assists the three-way catalytic effect when the engine is operating at high speeds.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent substitutions without departing from the spirit and scope of the technical solutions of the present invention should be included in the scope of the claims of the present invention.

Claims (9)

1. An installation structure of a catalytic converter integrated particle catcher, characterized in that: it comprises a three-way catalytic converter cavity, a bellows, and a particle catcher cavity connected in sequence; the three-way catalytic converter cavity There is a bracket mechanism for installing the three-way catalytic converter cavity on the transmission housing, the intake end of the three-way catalytic converter cavity is communicated with the engine exhaust manifold, and the exhaust end of the particle trap cavity is connected with the muffler Connected. 2 . The installation structure of the catalytic converter integrated particle trap according to claim 1 , wherein the angle formed by the inclination of the three-way catalytic converter cavity and the axial direction is greater than the inclination of the bellows and the axial direction. 3 . formed angle. 3 . The installation structure of the catalytic converter integrated particle trap according to claim 1 , wherein the bracket mechanism comprises a transition bracket fixedly connected with the three-way catalytic converter cavity, and a transition bracket arranged on the transition bracket and The transmission case mounts the attached cast iron brackets. 4 . The installation structure of the catalytic converter integrated particle trap according to claim 3 , wherein a tapered end cover with smooth transition connection is provided between the three-way catalytic converter cavity and the exhaust manifold. 5 . . 5 . The installation structure of the catalytic converter integrated particle trap according to claim 4 , wherein a flange plate for fastening the two is provided between the bellows and the particle trap cavity. 6 . . 6 . The installation structure of the catalytic converter integrated particle trap according to claim 5 , wherein an oxygen sensor mounting seat is arranged between the bellows and the flange, and the particle trap cavity A pressure sensor mounting seat and a temperature sensor mounting seat are arranged on it. 7 . The installation structure of the catalytic converter integrated particle catcher according to claim 6 , wherein the air outlet end of the particle catcher cavity is provided with a suspension ring for installation with the chassis of the vehicle, and the suspension ring is made of rubber material. 8 . production. 8 . The installation structure of the catalytic converter integrated particle trap according to claim 7 , wherein the included angle between the three-way catalytic converter cavity and the axial direction is 70-75°, and the bellows and the The included angle in the axial direction is 30-40°. 9 . The installation structure of the catalytic converter integrated particle trap according to claim 8 , wherein the carrier inside the three-way catalytic converter cavity is a honeycomb carrier, and the carrier is separated from the exhaust manifold outlet. 10 . The distance of the air port is 50-150mm, the diameter of the honeycomb carrier is 118.4mm, and the pore density is 750 meshes.