CN201401219Y

CN201401219Y - Catalytic converter of petrol engine single layer manifold branch

Info

Publication number: CN201401219Y
Application number: CN2009201187965U
Authority: CN
Inventors: 陈法献
Original assignee: LINHAI BONDLYE MOTOR VEHICLE ENVIRONMENTAL TECHNOLOGY Co Ltd
Current assignee: ZHEJIANG BONDLYE ENVIRONMENTAL TECHNOLOGY CO., LTD.
Priority date: 2009-04-29
Filing date: 2009-04-29
Publication date: 2010-02-10
Anticipated expiration: 2019-04-29

Abstract

A catalytic converter of petrol engine single layer manifold branch belongs to the technical field of petrol engine catalytic converters. The catalytic converter of petrol engine single layer manifoldbranch comprises a front flange, an exhaust manifold branch, a front end cap, a barrel, an oxygen sensor holder and a rear end cap, wherein a catalyst carrier is arranged in the barrel, the catalystcarrier is wrapped by ceramic sealing backing strips, two ends of the barrel are respectively provided with close covers of the front end cap and the rear end cap, and the catalytic converter of petrol engine single layer manifold branch is characterized in that the exhaust manifold branch is composed of a hemi-spherical single layer upper shell and a hemi-spherical single layer lower shell whichare combined. The catalytic converter of petrol engine single layer manifold branch adopts robot welding and shaping technique, a petrol engine discharges waste gas, the waste gas passes through the exhaust manifold branch composed of the hemi-spherical single layer upper shell and the hemi-spherical single layer lower shell which are welded, then, converges into a spherical waste gas mixing chamber, flows into a stainless steel barrel after transition, and is purified through the catalyst carrier for achieving the demands that oxygen-ion concentration is even, the gas distribution is even, the gas pressure is constant, the heat energy loss is small, the gas exhaust is smooth, the exhaust back pressure is small, the oxygen sensor signals can be received sensitively, the ceramic sealing backing strip surface can not be blown out easily, and the like.

Description

A kind of petrol engine individual layer manifold catalytic converter

Technical field

The utility model belongs to petrol engine catalytic converter technology field, is specifically related to a kind of three cylinders, four-cylinder gasoline machine individual layer manifold catalytic converter.

Background technique

At present, the environmental problem that motor vehicle exhaust emission brings more and more is subjected to the attention of countries in the world, administers motor vehicle exhaust emission and mainly adopts the ternary catalyzing unit post-processing technology.China has successively captured correlation technique, has realized meeting the production domesticization of the ternary catalyzing unit of Europe II emission standard.Along with state's three standards were carried out by country since 08 year, existing ternary catalyzing unit can't satisfy this requirement.The difference of Europe II standard and EUROIII Emission Standard maximum is that Europe II standard is that engine cold-start begins to survey tail gas after 40 seconds, and EUROIII Emission Standard is to survey tail gas behind the engine start immediately.The initiation temperature of ternary catalyzing unit is that it is inoperative being lower than this temperature about 280 degree.For this reason, need ternary catalyzing unit is installed on the engine body, utilize high temperature herein to carry out catalyzed conversion.Exhaust has some setbacks, exhaust back pressure is big, distribution of gas is inhomogeneous, heat-energy losses is big, the oxygen sensor signal reception is insensitive, ceramic seal liner face easily is deflated problems such as deflation, processing technology complexity but exist.

The model utility content

At problems of the prior art, the utility model is by changing the structure of petrol engine catalytic converter, the technological scheme that design provides that a kind of distribution of gas is even, gas pressure is constant, heat-energy losses is few, exhaust is smooth and easy, exhaust back pressure is little, oxygen sensor signal receives sensitive, the durable superior and simple petrol engine individual layer of technology manifold catalytic converter.

Described a kind of petrol engine individual layer manifold catalytic converter, comprise forward flange, gas exhaust manifold, front cover, cylindrical shell, the lambda sensor seat, rear end cover is provided with catalyst carrier in the cylindrical shell, catalyst carrier is wrapped up by the ceramic seal liner, the cylindrical shell two ends have front cover and rear end cover capping respectively, it is characterized in that gas exhaust manifold is formed by hemisphere individual layer upper shell and the merging of hemisphere individual layer lower shell body.

Described a kind of petrol engine individual layer manifold catalytic converter is characterized in that the lambda sensor seat comprises preceding lambda sensor seat and post oxygen sensor seat.

Described a kind of petrol engine individual layer manifold catalytic converter is characterized in that rear end cover is by pipe, flange, the casting integrated moulding of post oxygen sensor seat.

Described a kind of petrol engine individual layer manifold catalytic converter, it is characterized in that hemisphere individual layer upper shell and hemisphere individual layer lower shell body are welded into gas exhaust manifold and spherical waste gas mixing chamber, lambda sensor seat before being provided with on the hemisphere individual layer upper shell of spherical waste gas mixing chamber.

Described a kind of petrol engine individual layer manifold catalytic converter is characterized in that the two ends of ceramic seal liner are provided with back-up ring, and back-up ring forms for Stainless Steel Cloth multilayer stack compacting.

Described a kind of petrol engine individual layer manifold catalytic converter, it is characterized in that the material that forward flange adopts is a carbon steel, the material that hemisphere individual layer upper shell, hemisphere individual layer lower shell body, cylindrical shell, front cover and back-up ring are adopted is a stainless steel, and the material that rear end cover adopts is a spheroidal graphite cast iron.

The utility model, adopt the robot welding moulding process, the gas exhaust manifold that the petrol engine combustion gas is welded into via upper and lower half shell of hemisphere individual layer, after importing the transition of spherical waste gas mixing chamber again, flow into stainless steel cylinder and purify through catalyst carrier, with reach the oxygen ion concentration homogeneous, distribution of gas is even, gas pressure is constant, heat-energy losses is few, exhaust is smooth and easy, exhaust back pressure is little, oxygen sensor signal receives sensitive, ceramic seal liner face and is difficult for being deflated requirements such as deflation.And this petrol engine individual layer manifold catalytic converter has characteristics simple in structure, easily manufactured, has improved catalytic converter durability and assembling capacity greatly.

Description of drawings

Fig. 1 is the utility model three cylinder individual layer manifold catalytic converter profile schematic representation;

Fig. 2 is the sectional structure schematic representation of Fig. 1;

Fig. 3 is the utility model four cylinder individual layer manifold catalytic converter profile schematic representation;

Fig. 4 is the sectional structure schematic representation of Fig. 3.

Among the figure: lambda sensor seat, 11-post oxygen sensor seat before 1-forward flange, 2-hemisphere individual layer upper shell, 3-hemisphere individual layer lower shell body, 4-front cover, 5-cylindrical shell, 6-rear end cover, 7-ceramic seal liner, 8-catalyst carrier, 9-back-up ring, the 10-.

Embodiment

As shown in Figure 1 and Figure 2, the utility model is three cylinder individual layer manifold catalytic converters, Fig. 3, Fig. 4 are four cylinder individual layer manifold catalytic converters for the utility model, it comprises forward flange 1, gas exhaust manifold, front cover 4, cylindrical shell 5, preceding lambda sensor seat 10, post oxygen sensor seat 11, rear end cover 6, catalyst carrier 8, catalyst carrier 8 are set by ceramic seal liner 7 parcels in the cylindrical shell 5, cylindrical shell 5 two ends have front cover 4 and rear end cover 6 cappings respectively.Hemisphere individual layer upper shell 2 and hemisphere individual layer lower shell body 3 are welded into gas exhaust manifold and spherical waste gas mixing chamber, gas exhaust manifold picks out by the cylinder head of forward flange 1 by motor, importing spherical waste gas mixing chamber is connected with front cover 4, preceding lambda sensor seat 10 is arranged on the hemisphere individual layer upper shell 2 of spherical waste gas mixing chamber, it is three that three cylinder individual layer manifold catalytic converter hemisphere individual layer upper shells 2 and hemisphere individual layer lower shell body 3 merge the back manifold, it is four that four cylinder individual layer manifold catalytic converter individual layer upper shells 2 and hemisphere individual layer lower shell body 3 merge the back manifold, adopt such structure petrol engine combustion gas after the transition of spherical waste gas mixing chamber, reached the concentration homogeneous of oxonium ion, distribution of gas is even, gas pressure is constant, heat-energy losses is few, exhaust is smooth and easy, exhaust back pressure is little, oxygen sensor signal receives requirements such as sensitivity, but also made things convenient for manufacturing, improved catalytic converter durability and assembling capacity.Rear end cover 6 has comprised pipe, flange, post oxygen sensor seat 11, these parts and rear end cover 6 casting integrated moulding, and rear end cover 6 is connected with cylindrical shell 5, such designs simplification processing technology, and improved the tightness and the durability of catalytic converter.The two ends of ceramic seal liner 7 are provided with back-up ring 9, and back-up ring 9 forms for Stainless Steel Cloth multilayer stack compacting, and it effectively solves ceramic seal liner 7 front-end faces easily by problems such as air-flow deflation, increases the service life.The material that forward flange 1 is adopted is a carbon steel, and the material that hemisphere individual layer upper shell 2, hemisphere individual layer lower shell body 3, cylindrical shell 5, front cover 4 and back-up ring 9 are adopted is a stainless steel, and the material that rear end cover 6 adopts is a spheroidal graphite cast iron.

Claims

1. petrol engine individual layer manifold catalytic converter, comprise forward flange (1), gas exhaust manifold, front cover (4), cylindrical shell (5), the lambda sensor seat, rear end cover (6) is provided with catalyst carrier (8) in the cylindrical shell (5), catalyst carrier (8) is wrapped up by ceramic seal liner (7), cylindrical shell (5) two ends have front cover (4) and rear end cover (6) capping respectively, it is characterized in that gas exhaust manifold is formed by hemisphere individual layer upper shell (2) and hemisphere individual layer lower shell body (3) merging.

2. a kind of petrol engine individual layer manifold catalytic converter as claimed in claim 1 is characterized in that the lambda sensor seat comprises preceding lambda sensor seat (10) and post oxygen sensor seat (11).

3. a kind of petrol engine individual layer manifold catalytic converter as claimed in claim 1 is characterized in that rear end cover (6) is by pipe, flange, the casting integrated moulding of post oxygen sensor seat (11).

4. a kind of petrol engine individual layer manifold catalytic converter as claimed in claim 1, it is characterized in that hemisphere individual layer upper shell (2) and hemisphere individual layer lower shell body (3) are welded into gas exhaust manifold and spherical waste gas mixing chamber, lambda sensor seat (10) before being provided with on the hemisphere individual layer upper shell (2) of spherical waste gas mixing chamber.

5. a kind of petrol engine individual layer manifold catalytic converter as claimed in claim 1 is characterized in that the two ends of ceramic seal liner (7) are provided with back-up ring (9), and back-up ring (9) forms for Stainless Steel Cloth multilayer stack compacting.

6. a kind of petrol engine individual layer manifold catalytic converter as claimed in claim 1, it is characterized in that the material that forward flange (1) is adopted is a carbon steel, the material that hemisphere individual layer upper shell (2), hemisphere individual layer lower shell body (3), cylindrical shell (5), front cover (4) and back-up ring (9) are adopted is a stainless steel, and the material that rear end cover (6) adopts is a spheroidal graphite cast iron.