Secondary air control valve device

Details Secondary air control valve device Secondary air control valve device

1977-10-04

1979-07-03

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

60290, F01N 310

Patent

active

041596269

ABSTRACT:
Disclosed is a secondary air control device disposed in a system for supplying secondary air into an exhaust system of an internal combustion engine for purifying exhaust gas emitted from the engine. The secondary air control device comprises a first valve device actuated by an ON-OFF vacuum signal for stepwisely controlling the flow of secondary air in response to the ON-OFF vacuum signal, and; a second valve device, which is a delay system with a predetermined delay time, actuated by the ON-OFF vacuum signal for controlling the flow of secondary air. Accordingly, the secondary air control device can control the flow of secondary air, which comprises a step flow generated by the first valve device, and a delayed flow generated by the second valve device, in accordance with the ON-OFF vacuum signal.

REFERENCES:
patent: 3906723 (1975-09-01), Matumoto
patent: 3931710 (1976-01-01), Hartel
patent: 4112678 (1978-09-01), Miyagi

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