CN215170279U

CN215170279U - Catalyst packaging structure

Info

Publication number: CN215170279U
Application number: CN202120839087.7U
Authority: CN
Inventors: 刘宇; 赵挺; 代士青; 张海冲
Original assignee: Jiangxi Isuzu Motors Co Ltd
Current assignee: Jiangxi Isuzu Motors Co Ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2021-12-14
Anticipated expiration: 2031-04-22

Abstract

The utility model provides a catalyst converter packaging structure, including oxidation catalyst converter, particle trap, wherein, on the oxidation catalyst converter was fixed in the engine cylinder body, be provided with the oxidation catalyst converter entry on the oxidation catalyst converter, the direct intercommunication of booster export of oxidation catalyst converter entry and engine. The particle catcher is arranged close to the oxidation catalyst, and the inlet of the particle catcher is directly communicated with the outlet of the oxidation catalyst, so that the tail gas is at a higher temperature when entering the particle catcher. The utility model provides a catalyst converter packaging structure communicates particulate trap's directness and oxidation catalyst converter, does not additionally set up the connecting pipe between the two for tail gas in the oxidation catalyst converter can directly enter into particulate trap, and the heat when reducing tail gas and entering into particulate trap is scattered and disappears, makes the temperature that enters into the tail gas in the particulate trap can be in higher temperature, satisfies the required tail gas inlet temperature of DPF regeneration, and then improves the treatment effect of tail gas.

Description

Catalyst packaging structure

Technical Field

The utility model relates to an automobile exhaust handles the field, especially relates to a catalyst converter packaging structure.

Background

The national six regulations are about to be officially implemented in nationwide areas, wherein the limit values of various indexes of tail gas are further tightened, and a Diesel Particulate Filter (DPF) is the internationally recognized and most practical and effective particulate post-treatment technology at present. The diesel engine particle catcher is used for introducing tail gas of a diesel engine into a special post-processing device, catching and concentrating particles in exhaust gas, preventing the particles from being exhausted out of a vehicle, and utilizing a catalyst to carry out oxidative decomposition and combustion to remove most particles in the exhaust gas, thereby reducing particle emission. The device can reduce harmful particles in the diesel engine by 70-98%, and most of particles are filtered out by the filter body, so that the purpose of purifying tail gas is achieved.

Traditional chassis formula arrangement scheme has increased the intermediate pipe connection, it is longer from oxidation catalyst converter (DOC) to pipeline between particulate filter (DPF), the great part heat has been fallen in the loss of tail gas before getting into the DPF, the required important index of DPF regeneration is entry temperature, need keep warm to intermediate line in order to solve the heat dissipation, ordinary heat preservation cotton can not bear the higher temperature on the blast pipe, must adopt the special glass fiber heat preservation cotton that high temperature resistance is good, if the effect that keeps warm still need thicken not well, this part cost is very high, the structure is also complicated simultaneously, it requires highly to keep warm cotton installation process, cause the inefficacy easily.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a catalyst converter packaging structure for it is longer to solve among the traditional chassis formula arrangement scheme DOC among the prior art and between DPF, loses a large amount of thermal technical problem when leading to tail gas to enter into in the DPF.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a catalyst packaging structure is applied to on the exhaust treatment device of car, catalyst packaging structure includes:

the oxidation catalyst is fixed on an engine cylinder body, an oxidation catalyst inlet is formed in the oxidation catalyst, and the oxidation catalyst inlet is directly communicated with a supercharger outlet of an engine;

the particle trap is arranged close to the oxidation catalyst, and the inlet of the particle trap is directly communicated with the outlet of the oxidation catalyst, so that the tail gas is at a higher temperature when entering the particle trap.

In one embodiment, the ends of the particulate trap are provided with mounting plates for securing the particulate trap to the engine block.

In one embodiment, the oxidation catalyst and the particulate trap are both attached and secured to the engine block using connecting rods and threaded fasteners.

In one embodiment, the threaded fastener is a screw.

In one embodiment, the temperature of the exhaust gas at the inlet of the particulate trap is between 600 ℃ and 650 ℃.

In one embodiment, the surfaces of the oxidation catalyst and the particle trap are provided with a heat-insulating coating for reducing the amount of heat dissipated by the exhaust gas entering the particle trap.

The embodiment of the present invention provides one or more technical solutions, which at least have the following technical effects or advantages:

the embodiment of the utility model provides a catalyst converter packaging structure, including oxidation catalyst converter, particle trap, wherein, on the oxidation catalyst converter was fixed in the engine cylinder body, be provided with the oxidation catalyst converter entry on the oxidation catalyst converter, the direct intercommunication of booster export of oxidation catalyst converter entry and engine. The particle catcher is arranged close to the oxidation catalyst, and the inlet of the particle catcher is directly communicated with the outlet of the oxidation catalyst, so that the tail gas is at a higher temperature when entering the particle catcher. The utility model provides a catalyst converter packaging structure communicates the booster export of engine through the entry direct mount with the oxidation catalyst converter, and communicate particle trap's directness and oxidation catalyst converter, do not additionally set up the connecting pipe between the two, make tail gas in the oxidation catalyst converter can directly enter into particle trap, heat when reducing tail gas and entering into particle trap is lost, make the temperature of the tail gas that enters into in the particle trap can be in higher temperature, satisfy DPF required tail gas inlet temperature of regeneration, and then improve the treatment effect of tail gas.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of an oxidation catalyst in connection with a particulate trap according to the present invention;

fig. 2 is a schematic structural diagram of a catalyst packaging structure.

Wherein the reference numerals are as follows:

1. an oxidation catalyst; 2. a particle trap; 3. an engine block; 11. an oxidation catalyst inlet; 21. and (7) mounting the plate.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1 to 2, an embodiment of the present application provides a catalyst packaging structure, including an oxidation catalyst 1 and a particle trap 2, where the oxidation catalyst 1 is fixed on an engine cylinder 3, the oxidation catalyst 1 is provided with an oxidation catalyst inlet 11, and the oxidation catalyst inlet 11 is directly communicated with a supercharger outlet of an engine. The particle catcher 2 is arranged close to the oxidation catalyst 1, and the inlet of the particle catcher 2 is directly communicated with the outlet of the oxidation catalyst 1, so that the tail gas is at a higher temperature when entering the particle catcher 2. The utility model provides a catalyst converter packaging structure communicates the booster export of engine through the entry direct mount with oxidation catalyst converter 1, and communicate particle trap 2's directness and oxidation catalyst converter 1, do not additionally set up the connecting pipe between the two, make tail gas in the oxidation catalyst converter 1 can directly enter into particle trap 2, heat when reducing tail gas and entering into particle trap 2 is scattered and disappears, make the temperature that enters into the tail gas in the particle trap 2 can be in higher temperature, satisfy DPF required tail gas entry temperature of regeneration, and then improve the treatment effect of tail gas.

As can be seen from the installation form of FIG. 2, the inlet 11 of the oxidation catalyst is directly connected with the outlet of the supercharger, the particle catcher 2 is abutted against the lower end of the oxidation catalyst 1 to form an integral body, and the installation fixing points are all placed on the engine cylinder body 3 depending on the structural strength of the engine body, so that no relative movement exists between the particle catcher and the engine in the running process of the vehicle, the aftertreatment fixing failure caused by the vibration of the engine is avoided, the structure is reliable, and the service life is prolonged.

The DPF (particle trap 2) regeneration strategy adopts in-cylinder post-injection, when the exhaust back pressure of the engine reaches a preset pressure, the system judges that DPF regeneration is needed, the control system detects the exhaust temperature in front of a DOC (oxidation catalyst 1), when the exhaust temperature reaches the light-off temperature of the DOC, the oil pump generates 500kPa circulating pressure, the oil injector sprays diesel oil, the sprayed diesel oil oxidizes the diesel oil through the DOC and emits heat to improve the exhaust temperature of the engine, so that the exhaust temperature at the inlet of the DPF (particle trap 2) is kept at a preset temperature T (about 620 ℃), and PM (particulate matter) in the DPF is ignited. In one embodiment, the temperature of the exhaust gas at the inlet of the particulate trap 2 is between 600 ℃ and 650 ℃. Because the DPF is close to the DOC and almost has no temperature drop between the DPF and the DOC, the problem of temperature drop can be effectively solved, the DOC carrier is protected, and the stability of the system is ensured.

In addition, because the heat loss is small, the required fuel quantity injected in the cylinder in the regeneration working condition is also reduced, and the fuel consumption of the whole vehicle is relatively reduced.

In one embodiment, the end of the particle catcher 2 is provided with a mounting plate 21, which mounting plate 21 is used to fix the particle catcher 2 to the engine block 3. The particle catcher 2 can be more firmly fixed on the engine cylinder body 3 by adopting the mounting plate 21, and the particle catcher 2 is prevented from falling off.

In one embodiment, the oxidation catalyst 1 and the particulate trap 2 are both attached to the engine block 3 using connecting rods and threaded fasteners. In one embodiment, the threaded fastener is a screw.

In one embodiment, the surfaces of the oxidation catalyst 1 and the particle catcher 2 are provided with a heat-insulating coating for reducing the amount of heat dissipated during the entry of exhaust gases into the particle catcher 2.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a catalyst packaging structure, is applied to on the exhaust treatment device of car which characterized in that, catalyst packaging structure includes:

2. The catalyst packaging structure according to claim 1, wherein:

the end of the particle catcher is provided with a mounting plate for securing the particle catcher to the engine cylinder.

3. The catalyst packaging structure according to claim 1, wherein:

the oxidation catalyst and the particle catcher are connected and fixed on the engine cylinder body by adopting a connecting rod and a threaded fastener.

4. A catalyst encapsulation structure according to claim 3, wherein:

the threaded fastener is a screw.

5. The catalyst packaging structure according to claim 1, wherein:

the temperature of the tail gas at the inlet of the particle catcher is between 600 ℃ and 650 ℃.

6. The catalyst packaging structure according to claim 1, wherein:

the surfaces of the oxidation catalyst and the particle catcher are provided with heat-insulating coatings, and the heat-insulating coatings are used for reducing the heat dissipation value of the exhaust gas entering the particle catcher.