Stamp formed muffler and catalytic converter assembly
First Claim
1. A catalytic converter and exhaust muffler assembly having an inlet and an outlet for connection to pipes of an exhaust system, said assembly comprising:
- a catalytic converter;
first and second internal plates formed to engage said catalytic converter and to define channels disposed to define an array of tubes between said plates, said array of tubes being in communication with the catalytic converter and with the inlet and outlet of the assembly, selected portions of said channels being provided with perforations extending therethrough; and
at least one external shell secured to and surrounding at least portions of said internal plates, said external shell being stamp formed to define at least one expansion chamber surrounding and enclosing the perforations in the channels.
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Accused Products
Abstract
A combined catalytic converter and muffler is provided. A catalyst is securely mounted in a canister which in turn is mounted intermediate a pair of formed internal plates. The plates are further formed to define an array of tubes therebetween. The tubes comprise an inlet to the muffler and an outlet from the muffler and communicate with the inlet and outlet of the catalytic converter. Selected tubes may have perforations or other apertures through which exhaust gases may communicate. At least one external shell is mounted to the assembled internal plates. The external shell is formed to define a plurality of chambers which communicate with apertures in the internal plates.
79 Citations
19 Claims
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1. A catalytic converter and exhaust muffler assembly having an inlet and an outlet for connection to pipes of an exhaust system, said assembly comprising:
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a catalytic converter; first and second internal plates formed to engage said catalytic converter and to define channels disposed to define an array of tubes between said plates, said array of tubes being in communication with the catalytic converter and with the inlet and outlet of the assembly, selected portions of said channels being provided with perforations extending therethrough; and at least one external shell secured to and surrounding at least portions of said internal plates, said external shell being stamp formed to define at least one expansion chamber surrounding and enclosing the perforations in the channels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A catalytic converter and muffler assembly having an inlet and an outlet for connection to pipes of an exhaust system, said assembly comprising:
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a catalytic converter having an inlet and an opposed outlet and a catalyst mounted therebetween, the inlet to the catalytic converter being in communication with the inlet to the assembly; a pair of formed internal plates disposed generally in face-to-face relationship with one another and substantially surrounding and engaging said catalytic converter, said internal plates being formed to define an array of channels therein, said channels being disposed in generally opposed relationship to define a plurality of tubes, one said tube being mounted to and in communication with the outlet from said catalytic converter, said tubes further comprising an outlet from said assembly and a pair of tuning tubes disposed respectively on opposite sides of said catalytic converter, said tuning tubes being in communication with the remaining tubes in said array and terminating respectively at tuning apertures; and a pair of external shells secured to and surrounding the internal plates, said external shells being stamp formed to define a plurality of chambers including first and second low frequency resonating chambers surrounding and enclosing the tuning apertures of said tuning tubes, said chambers of said external shells further surrounding said catalytic converter and contributing to the heat insulation thereof. - View Dependent Claims (18, 19)
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Specification