Secondary air supply control system

Details Secondary air supply control system Secondary air supply control system

1977-05-23

1979-04-03

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

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

F01N 310

Patent

active

041470320

ABSTRACT:
A secondary air supply control system including: an air cleaner; an air pump connected to the air cleaner; a valve having a first chamber and a second chamber, which are separated by a diaphragm and communicated with each other through a first orifice, and controlling the supply of secondary air from the air pump to an exhaust manifold, in response to deflection of the diaphragm; and a passage connecting the second chamber to an intake manifold in a position downstream of a throttle valve in a carburetor and having a second orifice. In addition, a check valve which allows the flow of the secondary air only in the direction towards the exhaust manifold is provided in a passage interconnecting the valve and the exhaust manifold. In this system, an open cross-sectional area of the first orifice is smaller than that of the second orifice provided in the aforesaid passage.

REFERENCES:
patent: 3392523 (1968-07-01), Hyde
patent: 3888080 (1975-06-01), Nohira
patent: 3906723 (1975-09-01), Matumoto
patent: 4050249 (1977-09-01), Collins

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