Cold starting enrichment device

Details Cold starting enrichment device Cold starting enrichment device

1974-07-24

1976-05-18

Myhre, Charles J.

Internal-combustion engines

Starting device

For airplane

261 39D, 261 39B, F02N 1700

Patent

active

039570266

ABSTRACT:
A carburetor for an internal combustion engine is provided with auxiliary fuel means for continuously regulating the fuel air ratio from a first, cold start condition to a second, normal run condition. The auxiliary fuel means includes a vacuum operated metering system to provide the additional fuel required for starting and running the engine untile the engine reaches normal operating temperature, and a combination shut-off valve and air bleed. In the preferred embodiment, the air bleed is actuated by manifold pressure overcoming the closing force of a thermostatic coil, and is open whenever the engine starts. The air bleed increases air input to the auxiliary fuel supply, thereby reducing fuel richness after start. A temperature sensitive element such as a bimetal coil is utilized to operate the shut-off valve and completely closes the auxiliary fuel means input to the engine at some predetermined temperature.

REFERENCES:
patent: 2074471 (1937-03-01), Holley et al.
patent: 2264996 (1942-12-01), Messinger
patent: 2675792 (1954-04-01), Brown et al.
patent: 3249345 (1966-05-01), Gast
patent: 3278171 (1966-10-01), Carlson
patent: 3642256 (1972-02-01), Phelps
patent: 3706444 (1972-12-01), Masaki et al.

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