Tail pipe for drafting engine exhaust gas

Details Tail pipe for drafting engine exhaust gas Tail pipe for drafting engine exhaust gas

1987-12-24

1988-12-20

Fuller, B. R.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181227, 181251, 181255, 181263, F01N 112, F01N 114

Patent

active

047920149

ABSTRACT:
A tail pipe for drafting an engine exhaust gas includes: a front perforated pipe connected to an engine exhaust silencer or muffler, an outer pipe jacketed outside the front pipe for leading environmental air therein, a central pipe connected on a rear end portion of the front pipe and disposed inside the outer pipe, and plural swirl perforated plates each helically secured between the central pipe and the outer pipe and each swirl plate securing the rear portion of the front pipe between the outer pipe and the central pipe, whereby upon a discharge of an engine exhaust gas, the pressure of a partial exhaust gas stream is reduced by the induced environmental cooling air and the pressure of the remaining gas stream is further reduced since the gas stream is guided through the swirl perforated plates to exert an eddy flow at the pipe exit to strongly suck the exhaust gas outwardly.

REFERENCES:
patent: 1027469 (1912-05-01), Forney
patent: 1377472 (1921-05-01), Gibson
patent: 1577775 (1926-03-01), Templeton
patent: 4331213 (1982-05-01), Taniguchi
patent: 4361206 (1982-11-01), Tsai

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