Integral unitary manifold-muffler-catalyst device
First Claim
1. An integral manifold-muffler-catalyst device for an internal combustion engine having a plurality of combustion cylinders generating exhaust gases, comprising:
- (a) a monolithic catalyst having a plurality of aligned passages for effecting laminar flow of said exhaust gases therethrough;
(b) a high temperature resistant chamber assembly for close-coupling said catalyst to said engine having (i) an expansion chamber for substantially dissipating low frequency sound waves of said exhaust gases and for modifying high frequency sound waves of said exhaust gases and (ii) manifolding passages at one side of said expansion chamber for collecting and delivering the exhaust gases from said cylinders to the expansion chamber; and
(c) means for effecting converging flow from said expansion chamber to and substantially the full entrance face of said aligned passages and for effecting converging flow from said catalyst, said dual-stage convergence reflecting and attenuating high frequency sound waves carried by said exhaust gases by interference.
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Accused Products
Abstract
An integral manifold-muffler-catalyst device (for an internal combustion engine having a plurality of combustion cylinders generating exhaust gases), comprising: (a) a monolithic catalyst having a plurality of aligned passages for effecting laminar flow of the exhaust gases therethrough while; (b) a high temperature resistant chamber assembly for close-coupling the catalyst to the engine having (i) an expansion chamber for substantially dissipating low frequency standing sound waves of said exhaust gases and for modifying high frequency sound waves of said exhaust gases and (ii) manifolding passages at one side of the expansion chamber for collecting and delivering the exhaust gases from the cylinders to the expansion chamber; and (c) means for effecting converging flow from said expansion chamber to and across substantially the full entrance face of said aligned passages, as well as from the catalyst, for effecting attenuation of high frequency sound waves carried by the exhaust gases.
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Citations
13 Claims
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1. An integral manifold-muffler-catalyst device for an internal combustion engine having a plurality of combustion cylinders generating exhaust gases, comprising:
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(a) a monolithic catalyst having a plurality of aligned passages for effecting laminar flow of said exhaust gases therethrough; (b) a high temperature resistant chamber assembly for close-coupling said catalyst to said engine having (i) an expansion chamber for substantially dissipating low frequency sound waves of said exhaust gases and for modifying high frequency sound waves of said exhaust gases and (ii) manifolding passages at one side of said expansion chamber for collecting and delivering the exhaust gases from said cylinders to the expansion chamber; and (c) means for effecting converging flow from said expansion chamber to and substantially the full entrance face of said aligned passages and for effecting converging flow from said catalyst, said dual-stage convergence reflecting and attenuating high frequency sound waves carried by said exhaust gases by interference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An exhaust pipe system for treating and dispersing exhaust gases from an internal combustion engine carried by a multiple axle vehicle, comprising:
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(a) a monolithic catalyst having a plurality of aligned curvilinear passages for effecting laminar flow of said exhaust gases through a shaped path while effecting attenuation of high frequency sound waves carried by said exhaust gases; (b) a high temperature resistant chamber assembly for close-coupling the catalyst to said engine having an expansion chamber for substantially dissipating standing low frequency sound waves in said exhaust gases and for modifying high frequency sound waves in the exhaust gases, manifolding passages at one side of the expansion chamber for collecting and delivering the exhaust gases from the cylinders to the expansion chamber, and means for effecting converging flow from said expansion chamber to and across substantially the full entrance face of said aligned curvilinear passages; and (c) a generally horizontally extending tailpipe of uniform reduced diameter for conveying treated exhaust gases from said catalyst for dispersal behind the rear axle, said tailpipe being resiliently suspended except at its connection to said catalyst. - View Dependent Claims (13)
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Specification