Exhaust system of a reciprocating piston engine
First Claim
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1. An exhaust system for a reciprocating piston engine, comprising:
- an exhaust pipe,catalyst means inserted in the exhaust pipe,and air feeding line means for feeding outside air to the catalyst means for facilitating after reaction of exhaust gases flowing through the catalyst means,wherein the catalyst means include two separate monoliths enclosed by a common outer jacket,wherein both of the monoliths are enclosed by respective jacket tubes which are slidably disposed with respect to the outer jacket to accommodate thermal expansions during use,and wherein the air feeding line means is disposed to have an air feeding point in between the two separate monoliths.
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Abstract
A metal support catalyst is inserted into the exhaust pipe of a reciprocating piston engine. The catalyst comprises two monoliths spaced away from one another and surrounded by jacket tubes which are centered coaxially with respect to one another with a sliding fit in beads and crimpings of the outer jacket. At an air feeding point between the beads of the outer jacket, air is introduced between the two monoliths in the lower rotational speed range of the engine in order to achieve an afterreaction of the exhaust gases.
20 Citations
19 Claims
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1. An exhaust system for a reciprocating piston engine, comprising:
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an exhaust pipe, catalyst means inserted in the exhaust pipe, and air feeding line means for feeding outside air to the catalyst means for facilitating after reaction of exhaust gases flowing through the catalyst means, wherein the catalyst means include two separate monoliths enclosed by a common outer jacket, wherein both of the monoliths are enclosed by respective jacket tubes which are slidably disposed with respect to the outer jacket to accommodate thermal expansions during use, and wherein the air feeding line means is disposed to have an air feeding point in between the two separate monoliths. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An exhaust system for reciprocating piston engine, comprising:
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an exhaust pipe, catalyst means inserted int the exhaust pipe, and air feeding line means for feeding outside air to the catalyst means for facilitating after reaction of exhaust gases flowing through the catalyst means, wherein the catalyst means include two separate monoliths enclosed by a common outer jacket, wherein the two monoliths are mounted inside said outer jacket so as to have respective ends of the monoliths slidably movable with respect to the outer jacket to accommodate thermal expansion during use, and wherein the air feeding line means is disposed to have an air feeding point in between the two separate monoliths. - View Dependent Claims (15)
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16. An exhaust system for a reciprocating piston engine, comprising:
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an exhaust pipe, catalyst means inserted in the exhaust pipe, and air feeding line means for feeding outside air to the catalyst means for facilitating after reaction of exhaust gases flowing through the catalyst means, wherein the catalyst means include two separate monoliths enclosed by a common outer jacket, wherein the air feeding line means is disposed to have an air feeding point in between the two separate monoliths, wherein the air feeding point is formed by radial openings of the outer jacket and of one of the jacket tubes through which air is introduced into the space between the monoliths, and wherein the outer jacket has beads curved on both sides toward the inside to the air feeding point in which the inner ends of the jacket tubes which are adjacent to one another are centered with a sliding fit in a sealed manner. - View Dependent Claims (17, 18, 19)
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Specification