[특허]Catalytic converter for the catalytic treatment of exhaust gas

Catalytic converter for the catalytic treatment of exhaust gas 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01D-050/00 F01N-003/08
출원번호	US-0303285 (1994-09-08)
우선권정보	CH-0001316 (1991-05-02)
발명자 / 주소	Steenackers Pieter D. (Heverlee BEX)
출원인 / 주소	Scambia Industrial Developments Aktiengesellschaft (Schaan LIX 03)
인용정보	피인용 횟수 : 45 인용 특허 : 0

초록 ▼

The catalytic converter has a casing with an inlet and an outlet and a gas-permeable catalyst element which is arranged in the casing and has an exhaust gas entry surface. A guide surface which faces the orifice of the inlet, is a distance away from its edge and makes an angle of preferably at least 60°and, for example, 90°with the stated axis is present in the casing. The inlet has an inner surface with a cylindrical or slightly conical inner surface section which, in the orifice region of the inlet, is continuously connected to a counter-surface opposite the guide surface by a transition surface section which extends in an arc-like manner towards the inner space of the housing in a section through the axis of the inlet. The exhaust gas flowing through the inlet can be deflected by the guide surface with little pressure loss and can then flow into the element, uniformly distributed over the exhaust gas entry surface of the element.

대표청구항 ▼

A catalytic converter for catalytic treatment of exhaust gas comprising: a casing having an inner space, an inlet communicating with the inner space and having an orifice for conducting the exhaust gas into the inner space, and an outlet, a gas-permeable catalyst element located in the inner space for catalytic treatment of the exhaust gas entering the inner space, a guide surface located within the inner space for guiding the exhaust gas to the catalyst element, and a counter-surface encompassing the orifice and located opposite the guide surface; wherein the inlet has an axis and comprises an inner surface section that is one of substantially cylindrical and substantially conical and makes, when the inner surface section is substantially conical, an angle of at most 25°with the axis and has an internal diameter di at an end thereof nearer to the orifice, wherein the inlet has a transition surface section for continuously connecting the inner surface section thereof with the counter-surface, the transition surface section curving and widening toward the counter-surface in a section through the axis, wherein the guide surface is located opposite the orifice, the transition surface section and the counter-surface, at least major parts of the guide and counter-surfaces forming angles of at least 60°with the inlet axis, wherein the guide surface is spaced from the counter-surface, at a portion thereof adjacent to a wider end of the transition surface, a distance h equal at most 70% of the internal diameter di of the inner surface section of the inlet, wherein the guide surface limits, together with the counter-surface, a deflection cavity and is shaped such that at least a substantial part of the exhaust gas supplied to the catalytic converter is lead through the deflection cavity in a direction directed away from the axis to a border section of the deflection cavity before the exhaust gas enters into the catalyst element, and wherein the border section surrounds the orifice at a radial distance of the axis which is at least 1.5 times of the internal diameter di.

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Catalytic converter for the catalytic treatment of exhaust gas 원문보기

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