US 5,493,859 AGranted

Engine with an adsorber

AssigneeNippondenso Co., Ltd.

InventorsYukihiro Shinohara, Toshihiko Igashira, Tohru Yoshinaga, Masatoshi Basaki

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Abstract

An object is to capture unburned fuel immediately after startup of an engine effectively. A vessel is disposed in an exhaust manifold of an engine and opened only at one end, its opening directed toward exhaust ports. Catalyst carrier is stored in the vessel. Since exhaust material has high specific gravity as compared to that of vaporized exhaust gas, the unburned fuel is exhausted rectilinearly from the exhaust ports due to its inertia, entering the vessel to be captured in the catalyst carrier. When the temperature of the catalyst reaches the temperature required for activating as the exhaust gas temperature rises, exhaust material is exhausted with purified condition. Since the vessel is opened only at one end, the current passing through this does not occur, making it possible to prevent the damage of the catalyst carrier due to the excessive high-temperature.

Claims11

Dependent claims

An engine with an adsorber for adsorbing exhaust material, said engine comprising:

an exhaust port for conveying exhaust gas discharged from an engine cylinder;
an exhaust manifold disposed downstream from said exhaust port for collecting the exhaust gas conveyed by said exhaust port;
and
adsorbing means, in said manifold, for adsorbing exhaust material from said exhaust port, said adsorbing means having an open first end and a closed second end and being disposed at a predetermined distance from said exhaust port in said exhaust manifold, said open end facing opposite to a flow direction of the exhaust gas flowing from said exhaust port,
wherein said adsorbing means includes a catalyst which adsorbs exhaust material in pulsating exhaust gas conveyed by said exhaust port after startup of the engine to thereby purify the exhaust gas when said catalyst is activated, and wherein said catalyst includes a vessel, disposed in said exhaust manifold, having an opening at one end which is directed toward the engine cylinder exhaust port, and a catalyst carrier including plane and corrugated plates made of metal foil alternately disposed in said vessel.

2 more elements

An engine with an adsorber adsorbing exhaust material, said engine comprising:

an exhaust port for conveying exhaust gas discharged from an engine cylinder;
an exhaust manifold disposed downstream from said exhaust port for collecting the exhaust gas conveyed by said exhaust port;
adsorbing means, in said manifold, for adsorbing exhaust material from said exhaust port, said adsorbing means having an opening at one end to receive the exhaust gas, said opening facing toward said exhaust port to receive the exhaust gas directly;
an exhaust pipe connected to said exhaust manifold at a downstream end of said manifold;
and
a main catalyst, disposed in said exhaust pipe, for purifying exhaust material vapored from said adsorbing means;
wherein said adsorbing means includes a catalyst which adsorbs exhaust material in pulsating exhaust gas conveyed by said exhaust port after startup of the engine to thereby purify the exhaust gas when said catalyst is activated;
and
said catalyst includes a vessel, disposed in said exhaust manifold, having an opening at one end which is directed toward the engine cylinder exhaust port, a catalyst carrier including plane and corrugated plates made of metal foil disposed in said vessel, and at least one noble metal coating on said plane and corrugated plates.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/183,944Filed 21 Jan 1994
Priority: JP 5-02608721 Jan 1993
Granted: 27 Feb 1996
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

B01D 53/9481
By catalytic processes: catalyst preceded by an adsorption device without catalytic function for temporary storage of contaminants, e.g. during…
F01N 3/0814
By using absorbents or adsorbents: combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
F01N 3/0835
Characterised by the absorbed or adsorbed substances: hydrocarbons
F01N 3/0857
Characterised by the absorbed or adsorbed substances: carbon oxides