CN1944974A

CN1944974A - Ternary catalytic device for engine

Info

Publication number: CN1944974A
Application number: CNA2006100545329A
Authority: CN
Inventors: 朱絮飞
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2006-10-26
Filing date: 2006-10-26
Publication date: 2007-04-11

Abstract

The ternary catalysis device for engine consists of a casing, a ternary catalysis element and a lining. The casing has one middle part in single layer thin wall structure and two end parts, including one in front of the ternary catalysis element and one in back of, of belled multilayer structure comprising one outer layer, one heat isolating layer for maintaining the exhaust temperature and one inner layer. The present invention has ensured exhaust temperature, reduced heat load of the casing and capacity of reaching strict exhaust requirement.

Description

A kind of ternary catalytic device for engine

Technical field

The present invention relates to the ternary catalyzing unit structure of motor car engine.

Background technique

The normal structure of the ternary catalyzing unit that uses on the automobile is individual layer as the centre of housing and the horn mouth on both sides at present, its structure is seen Fig. 1, comprise ternary catalyzing unit core 11, liner 12, housing 13 and thermal shield 14, housing 13 is implemented encapsulation by 12 pairs of ternary catalyzing unit cores of liner 11, for the radiation heat that stops ternary catalyzing unit causes thermal radiation to peripheral component, have externally to apply thermal shield 14.In this structure, in order to make housing 13 heatproofs, the Thickness Design of housing 13 must be thicker, and maintain the gap between housing 13 and thermal shield 14, allows moving air take away the ternary catalyzing unit heat.But such structure can make the entrance and exit temperature of ternary catalyzing unit descend simultaneously, and this is unfavorable for meeting higher emission request.

Summary of the invention

Of the present invention being provides a kind of ternary catalytic device for engine at the deficiency of prior art existence, under the prerequisite that guarantees effective delivery temperature, reduces the heat load of housing, to adapt to stricter Abgasgesetz.

In order to reach the foregoing invention purpose, we adopt following technic relization scheme:

A kind of ternary catalytic device for engine, include housing, ternary catalyzing unit core and liner, the housing middle part is the single thin layer wall construction, at the two ends of housing is the place ahead and rear loudspeaker part with dissection of ternary catalyzing unit core, the loudspeaker part is made of skin, insulation layer and internal layer, and insulation layer adopts resolves hot material to keep delivery temperature.

In addition, the thickness at housing middle part reduces to thickness 1.5mm by common 2mm, reduces the heat load of housing significantly, makes it reach low heat capacity, and is high temperature resistant, improves oxidative stability.

Simultaneously, in order to guarantee the retentivity of liner, strengthen liner thickness and be increased to 6mm by common 4mm.

This ternary catalyzing unit compared with prior art has following beneficial effect;

1, loudspeaker partly adopt disconnected hot sandwich structure, can effectively keep delivery temperature;

2, thin walled structures is adopted at the housing middle part, and heat load is little, has low heat capacity, and is high temperature resistant, the advantage of good in oxidation resistance.

3, strengthen liner thickness, can improve the retentivity of liner.

4, this structure does not have thermal shield of the prior art, has saved cost, and the diameter that can strengthen the ternary catalyzing unit core is to adapt to higher Abgasgesetz.

Description of drawings

Fig. 1 is the structural drawing of existing single hull ternary catalyzing unit;

Fig. 2 is the structural drawing of the ternary catalyzing unit that proposes of the present invention.

Embodiment

The invention will be further described below in conjunction with accompanying drawing:

Referring to Fig. 2, this ternary catalyzing unit is made up of liner 22, housing 21 and ternary catalyzing unit core 23.Housing 21 is implemented encapsulation by 22 pairs of ternary catalyzing unit cores of liner 23, strengthens liner 22 thickness, is increased to 6mm by common 4mm.The housing middle part 211 in the middle of housing 21 is divided into and the loudspeaker part 212 at two ends, for guaranteeing heat radiation, housing middle part 211 is the single thin layer wall construction, thickness 1.5mm, simultaneously in order to keep delivery temperature, the sandwich structure that loudspeaker part 212 has adopted outer A, insulation layer B, internal layer to constitute, it is that outer A and internal layer C are being inserted the insulation layer B with effect of heat insulation after the 211 port part welding of housing middle part, opens the combustion temperature with what guarantee that delivery temperature reaches ternary catalyzing unit core 6 as early as possible.

Claims

1, a kind of ternary catalytic device for engine, include housing, ternary catalyzing unit core and liner, it is characterized in that: the housing middle part is the single thin layer wall construction, at the two ends of housing is the place ahead and rear loudspeaker part with dissection of ternary catalyzing unit core, and the loudspeaker part is made of skin, internal layer and middle insulation layer.

2, ternary catalytic device for engine according to claim 1 is characterized in that: the thickness at housing middle part is 1.5mm.

3, ternary catalytic device for engine according to claim 1 and 2 is characterized in that: liner thickness is 6mm.