Dual path exhaust pipe for mounting an oxygen sensor

Details Dual path exhaust pipe for mounting an oxygen sensor Dual path exhaust pipe for mounting an oxygen sensor

1987-08-17

1988-05-24

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

60323, F01N 310

Patent

active

047457422

ABSTRACT:
A dual exhaust pipe segment for mounting an oxygen sensor is connected to a dual exhaust manifold of an internal combustion engine. The exhaust pipe segment comprises a communicating portion where the two paths communicate with each other. The communicating portion defines an oxygen sensor mounting location. The exhaust pipe further comprises tapered inwardly facing surfaces upstream of the oxygen sensor installing position. Tapers of the tapered inwardly facing surfaces are determined such that extension of the tapered inwardly facing surfaces tangentially contact an outside surface of the oxygen sensor. As a result of this structure, almost all gas flowing from every cylinder of the engine can contact the oxygen sensor, and the temperatures of gas contacting the oxygen sensor are decreased to an appropriate extent relative to a sensor mounting location inside the dual exhaust manifold.

REFERENCES:
patent: 4484440 (1984-11-01), Oki
patent: 4656830 (1987-04-01), Ohno

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