Exhaust gas recycling device and process for producing same

Details Exhaust gas recycling device and process for producing same Exhaust gas recycling device and process for producing same

1993-06-25

1995-06-27

Hart, Douglas

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

12318442, 12318447, F02M 2304

Patent

active

054270804

ABSTRACT:
An exhaust gas recycling device for use in reducing the nitrogen oxide (NO.sub.x) concentration of exhaust gases from gasoline engines has between two metal plates superposed on each other a main channel defined by a first inflated portion of large cross section, and at least one branch channel defined by a second inflated portion communicating with the main channel and having a small cross section. The device comprises a single component provided by two metal plates, and is simple in construction and reduced in the number of parts, manufacturing cost and weight. The device is produced by roll-bonding two metal plates, forming at least one second inflated portion having a small cross section and defining the branch channel by primary inflation with a low fluid pressure, thereafter holding the two metal plates with dies, and forming a first inflated portion having a large cross section and defining the main channel by secondary inflation with a high fluid pressure.

REFERENCES:
patent: 3294073 (1966-12-01), Bressan
patent: 4169471 (1979-10-01), August
patent: 4258687 (1981-03-01), Mauch et al.
patent: 4516538 (1985-05-01), Arakawa et al.
patent: 4570603 (1986-02-01), Piedrafita

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