Exhaust gas line for an internal-combustion engine and its metho

Details Exhaust gas line for an internal-combustion engine and its metho Exhaust gas line for an internal-combustion engine and its metho

1991-06-20

1993-03-02

Lazarus, Ira S.

Power plants

Internal combustion engine with treatment or handling of...

Exhaust gas or exhaust system element heated, cooled, or...

60322, 60323, F21N 302, F21N 710

Patent

active

051898799

ABSTRACT:
The invention relates to an exhaust gas line for internal-combustion engines which is essentially free of tension at normal engine operating temperature. The exhaust gas line is enclosed by a water-cooled and gastight housing and is manufactured from a helically wound metal strip. Tensions that are the result of axial thermal expansion due to the temperature of the engine are avoided because the edges of the metal strip, in a cold state of the exhaust gas line, are aligned with respect to each other to produce a helical gap therebetween. The gap is just closed due to axial expansion of the exhaust gas line at normal engine operating temperature. Tensions that result from a radial expansion of the exhaust gas line are avoided because the exhaust gas line is mounted in a cold state while being subjected to a radial prestress. The prestress is just compensated for as a result of radial expansion at the normal engine operating temperature. The exhaust line is mounted to an engine housing by fasteners extending through bores in the metal strip. A jig and method for determining the location of the bores along the metal strip is provided.

REFERENCES:
patent: 2034119 (1936-03-01), Shebat
patent: 4658580 (1987-04-01), Schley et al.
patent: 4693079 (1987-09-01), Wuensche et al.

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