Altitude compensation apparatus for carburetor

Gas and liquid contact apparatus – Fluid distribution – Valved

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Details

261121B, 261DIG74, F02M 724

Patent

active

044723210

ABSTRACT:
An altitude compensation device for a carburetor including a chamber in communication with the atmosphere, an air bleed port conducting atmosphere from the chamber, a primary conduit providing fluid communication between the chamber and the fuel system of the carburetor, a first valve responsive to changes in atmospheric pressure for opening and closing the air bleed port, a first flow restrictor in the primary conduit downstream of the air bleed port, an auxiliary conduit providing fluid communication between an atmospheric pressure source and the primary conduit at a junction downstream of the flow restrictor and upstream of the carburetor fuel system, a second valve responsive to changes in atmospheric pressure controlling communication between the auxiliary conduit and the atmospheric pressure source, a second flow restrictor in the auxiliary conduit downstream of the atmospheric pressure source and upstream of the junction with the primary conduit, and a thermosensitive valve responsive to engine temperature permitting communication with the atmosphere through the auxiliary conduit when engine temperature is below a predetermined level and preventing communication with the atmosphere through the auxiliary conduit when engine temperature is above the predetermined level.

REFERENCES:
patent: 2342975 (1944-02-01), Shaff
patent: 3810606 (1974-05-01), Masaki
patent: 3861366 (1975-01-01), Masaki et al.
patent: 3906910 (1975-09-01), Szlaga, Jr.
patent: 3925521 (1975-12-01), Otani
patent: 3987131 (1976-10-01), Hisatomi et al.
patent: 4119074 (1978-10-01), Masaki
patent: 4148848 (1979-04-01), Ogita
patent: 4173956 (1979-11-01), Ikeura et al.
patent: 4177224 (1979-12-01), Yamanaka et al.

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