Heat-insulation type exhaust manifold

Details Heat-insulation type exhaust manifold Heat-insulation type exhaust manifold

1999-04-19

2000-12-05

Denion, Thomas

Power plants

Internal combustion engine with treatment or handling of...

Common receiver having inlets from plural cylinder

60322, F01N 710

Patent

active

061550469

ABSTRACT:
An exhaust manifold M is comprised of a plurality of inner exhaust pipe shells secured to an upper flange, and a plurality of outer exhaust pipe shells secured to the upper flange to individually cover the inner exhaust pipe shells, wherein a downstream end of each of the corresponding inner exhaust pipe shells slidably contacts an annular bead bulging from an outer peripheral surface of the downstream end of the outer exhaust pipe shells. An inner collecting pipe shell communicates with the plurality of inner exhaust pipe shells and is secured at its upstream end to the plurality of outer exhaust pipe shells, and an outer collecting pipe shell which is secured at its upstream end to the plurality of outer exhaust pipe shells covers the inner collecting pipe shell. A downstream end of the inner collecting pipe shell slidably contacts an annular mesh member interposed therebetween. Sliding portions for absorbing a difference in the axial thermal elongation between inner and outer double walls are provided separately at the downstream end of an exhaust single pipe and the downstream end of an exhaust collecting pipe. Thus, the sliding stroke in each of the sliding portions can be set to a small value, and the absorption of the thermal elongation can be carried out smoothly.

REFERENCES:
patent: 4037408 (1977-07-01), Ozawa
patent: 5606857 (1997-03-01), Harada
patent: 5953912 (1999-09-01), Kaiho et al.

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