Insulated damped exhaust manifold

Details Insulated damped exhaust manifold Insulated damped exhaust manifold

1993-11-22

1995-05-30

Lazarus, Ira S.

Power plants

Internal combustion engine with treatment or handling of...

Having vibration attenuating, or expansion and contraction...

60323, F01N 320

Patent

active

054191270

ABSTRACT:
An exhaust manifold for conducting the heated exhaust gas from an internal combustion engine. The exhaust manifold has a thin noncast metal inner layer, a thicker sheet metal outer layer, and a layer of insulating material, preferably ceramic beads, between the inner and outer layers. The method of making the exhaust manifold is also disclosed. The exhaust manifold is damped, insulated, and permits quicker light off of the catalytic converter.

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Moore, Wayne R. and Mondt, J. Robert, "Predicted Cold Start Emission Reductions Resulting from Exhaust Thermal Energy Conservation to Quicken Catalytic Converter Lightoff", SAE Technical Paper Series, Paper No. 931087, pp. 149-156, by SAE International, Warrendale, Pa. (1993).

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