CN2474734Y

CN2474734Y - Motor vehicle catalyst convertor

Info

Publication number: CN2474734Y
Application number: CN01221307U
Authority: CN
Inventors: 施林艳秋
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-05-10
Filing date: 2001-05-10
Publication date: 2002-01-30
Anticipated expiration: 2011-05-10

Abstract

The utility model provides a catalytic converter arranged on the internal portion of a tail-gas discharge pipeline of a motor vehicle and comprises a beehive body which is arranged inside a hollow outer cover and formed by the winding of a thin plate of which one side is wave type and the other side is flat type. The utility model adopts a liquid type welding paste to wind for forming a line-shaped weld portion, when the beehive body is used in the high temperature state, and the weld position is faster and more reliable. Metal strips are further arranged on two ends of the hollow outer cover, which avoids larger impedance caused in the process of tail gas discharge, thereby lowering the influence on the engine power of automotive vehicles.

Description

The Motor Vehicle Catalytic Converter

The utility model belongs to a kind of emission-control equipment that uses on the Motor Vehicle, relates in particular to a kind of Motor Vehicle Catalytic Converter that is included in the emission-control equipment.

In internal combustion engine exhaust system, in order to reduce pollutants such as a large amount of HC in the waste gas and CO, satisfy the gas emission standard, realize air purification, can adopt the device that impels waste gas to realize catalytic reaction usually.We adopt round column structure mostly at the daily Catalytic Converter of using, and are in the exhaust duct cylindraceous so that be arranged at profile.Be to adopt rounded plate material and the wave-shaped plate that curl particularly, mutual stacked volume is established rounded, be arranged at then in the circular metal frame ring, a kind of combination is when the honeycomb body carries out vacuum brazing, allow honeycomb body and outer sleeve be welded as a whole simultaneously, finally form the Catalytic Converter of global formation; Another kind of structure is that honeycomb body and outer sleeve are still separate, just weld several pillars in the circular metal frame ring opening both sides of inserting the honeycomb body, a utility model patent (application number: 97228018.9) that back one structure proposed referring on September 22nd, 1997.On the basis of said structure, on the honeycomb body, apply platinum, palladium, rhodium and capping oxidation layer again and make Catalytic Converter.More above-mentioned existing two kinds of structures, the former adopts vacuum brazing, complex process, cost is higher; Though latter's cost is low, because of a plurality of pillars stop, the resistance of air that is subjected to during exhaust is big, produces turbulent flow, can reduce the power of motor thus, influences usability.

The purpose of this utility model is at above-mentioned deficiency, proposes a kind of Catalytic Converter of architecture advances, adopts liquid soldering paste to reel, and makes the welding part of formation become wire, when the honeycomb body when the condition of high temperature is used, the welding position is more solid and reliable.

The further purpose of the utility model is that one side has been avoided the big impedance in the exhaust emissions process by adding metal bar at the hollow shell two ends, has reduced the influence to the starting motor-driven vehicle acc power.

The utility model is achieved in that a kind of Catalytic Converter, be arranged on the automotive emission pipe interior, comprise a honeycomb body that is arranged in the hollow shell, the honeycomb system is reeled by a sheet material and is formed, sheet material one side of honeycomb body is wavy, and opposite side is a flat condition.

Following according to giving accompanying drawing, the preferred embodiment of Catalytic Converter of the present utility model is described, wherein:

Fig. 1 is the schematic representation before sheet material is reeled in the utility model Catalytic Converter;

Fig. 2 is the reel honeycomb body schematic representation of a back preferred embodiment of sheet material in the utility model Catalytic Converter;

Fig. 3 is the structural representation of another preferred embodiment of the utility model Catalytic Converter.

See also the sheet material that Figure 1 shows that before reeling, the concavo-convex position 07 of wave shown in the figure provides the passage of the back air current flow of reeling.About in the of 05 both sides earlier the soldering paste 08 of liquid or paste to be coated on plate part before reeling, interlaced and asymmetric, and away from the dual-side certain distance of plate part 05.Then referring to Fig. 2, winding machinery is reeled sheet material to a sideway swivel, the plate part 05 and the sheet material of wave part 06 both sides are stacked together mutually, coiling and molding becomes a honeycomb body 03, carry out vacuum brazing at last, in carrying out the vacuum brazing process, liquid or paste soldering paste 08 act on the link position of plate part 05 and wave part 06, because the surface tension characteristics of liquid or paste soldering paste 08, scolder can be to the Gap Flow of wave part 06 with plate part 05 contact position, after welding finishes, flat 05 concerns with the welding that wave part 06 forms wire, the honeycomb body 03 that processes is inserted in the hollow shell, is coated with and is covered with catalyst, has just formed the Catalytic Converter of motor vehicle exhaust gases purification usefulness.Under the condition of high temperature that Catalytic Converter forms in the starting motor-driven vehicle running, air-flow is discharged from the passage of the concavo-convex position 07 of wave part, and the wire welding position has kept good soundness in this deformation process.

Fig. 3 provides another preferred embodiment of the utility model Catalytic Converter, adopt and the same coiling sheet material of Fig. 1, but do not need solder paste application or other welding consumabless, behind the coiling and molding, this honeycomb body 03 is placed in the hollow sleeve pipe 02, and weld one metal bar 04 fixing honeycomb body 03 wherein respectively at two opening ends of outer sleeve 02, this metal bar can adopt stainless steel, honeycomb body 03 is heated the back to the both sides expansion deformation of installing metal bar 04 additional, this preferred embodiment needn't be carried out vacuum brazing, cost is relatively low, and performance also can meet the demands.Adopt metal bar to avoid big impedance in the exhaust emissions process in addition, reduced influence the starting motor-driven vehicle acc power.

More than all embodiments only for the explanation the utility model usefulness, but not to restriction of the present utility model, person skilled in the relevant technique, under the situation that does not break away from spirit and scope of the present utility model, can also make various conversion or variation, so all technological schemes that are equal to also should belong to category of the present utility model and should be limited by each claim.

Claims

1, a kind of Catalytic Converter is arranged on the automotive emission pipe interior, comprises a honeycomb body that is arranged in the hollow shell, described honeycomb system is reeled by a sheet material and is formed, it is characterized in that sheet material one side of described honeycomb body is wavy, opposite side is a flat condition.

2, according to the described Catalytic Converter of claim 1, it is characterized in that, when described honeycomb body forms, applying liquid shape soldering paste on described flat sheets.

3, Catalytic Converter according to claim 2 is characterized in that, respectively is provided with interlaced and asymmetric soldering paste at the upper and lower surface of described sheet material flat condition.

4, Catalytic Converter according to claim 1 is characterized in that, respectively welds the fixing described honeycomb body of a metal bar in the shell both ends open position of described honeycomb body.

5, Catalytic Converter according to claim 4 is characterized in that, described metal strip material package is drawn together stainless steel.