Air flow control valve

Details Air flow control valve Air flow control valve

1977-02-15

1978-04-04

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

60301, 60306, F01N 315

Patent

active

040819604

ABSTRACT:
A control valve for the exhaust emission control system of the engine for an automotive vehicle controls secondary air flow between a region ahead of a reducing converter and a region intermediate the reducing converter and an oxidizing converter of the system, the amount of air introduced being proportional to engine exhaust flow. The air flow control valve, adapted to be connected to a source of secondary air, includes a first fixed area orifice to control air flow to the region ahead of the reducing converter, a second fixed area orifice and a first diaphragm controlled variable area orifice to control air flow to the region intermediate the reducing converter and the oxidizing converter, a second diaphragm controlled variable area orifice being used to control bypass air flow to the atmosphere.

REFERENCES:
patent: 3791146 (1974-02-01), Hayashi
patent: 3919842 (1975-11-01), Bolton
patent: 3927524 (1975-12-01), Cholvin

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