Air control apparatus for an engine exhaust gas purification sys

Details Air control apparatus for an engine exhaust gas purification sys Air control apparatus for an engine exhaust gas purification sys

1975-08-20

1977-02-15

Cline, William R.

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

60290, 137 87, G05D 1100

Patent

active

040077560

ABSTRACT:
An exhaust gas purifying apparatus for an engine, such as a thermal reactor or catalytic converter, is supplied secondary air through a secondary air control valve which is controlled by a combination of a first and a second differential pressure responding device. The first of these devices is responsive to the difference between a constant pressure and varying pressures of the engine manifold and of a secondary air supply means, in order to ensure the suitable secondary air feed, at low, medium and high load on the engine. A connector passage connects a passage of this first device to a pressure chamber of the second device, which actuates the secondary or control valve.

REFERENCES:
patent: 3805522 (1974-04-01), Sheppard
patent: 3905193 (1974-02-01), Heilman et al.
patent: 3921396 (1975-11-01), Nohira
patent: 3924408 (1975-12-01), Beiswenger et al.
patent: 3934413 (1976-01-01), Beiswenger et al.

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