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The manual choke pull handle in a 1989 Hyundai Excel. The term "choke" is applied to the carburetor's enrichment device even when it works by a totally different method. Commonly, SU carburettors have "chokes" that work by lowering the fuel jet to a narrower part of the needle. Some others work by introducing an additional fuel route to the ...
Most engines use a single carburetor shared between all of the cylinders, though some high-performance engines historically had multiple carburetors. In most cases (except for the accelerator pump), the driver pressing the throttle pedal does not directly increase the fuel entering the engine. Instead, the airflow through the carburetor ...
Cutaway view of the fuel system for the Ford Model T engine, showing the gravity-feed fuel supply, carburetor cutaway, and intake stream. [4] The Ford Model T engine had one carburetor, a side-draft, single-venturi unit. Its choke and throttle valves were controlled manually; the latter was with a hand lever rather than a foot pedal. The ...
Original design incorporating a leather bellows which was replaced by a piston. This image was published 1908 and 1909 A pair of SU carburettors from an MGB. The SU carburettor is a constant-depression carburettor that was made by a British manufacturer of that name or its licensees in various designs spanning most of the twentieth century.
Flooding can also occur if the choke has been over applied or has malfunctioned. A severe form of engine flooding occurs when excessive liquid fuel enters the combustion chamber. This reduces the dead volume of the combustion chamber and thus places a heavy load on the starter motor, such that it fails to turn the engine. Damage (due to ...
This self-adjusting nature makes the selection of the maximum venturi diameter (colloquially, but inaccurately, referred to as "choke size") much less critical than with a fixed-venturi carburettor. To prevent erratic and sudden movements of the piston, it is damped by light oil in a dashpot (under the white plastic cover in the picture), which ...
Most Turbo-Air 6 engines use two one-barrel Rochester H carburetors; one per cylinder head. A later high performance engine uses four carburetors; one Rochester HV primary and one Rochester H secondary per head. The secondary carb had no choke plate, idle circuit, accelerator pump, power circuit, or vapor vent. [16]: 12
The Autolite 2100 is a two venturi (barrel) carburetor manufactured in multiple variants by Autolite from 1957 to 1973. Eight sizes ranging from 190 cfm to 424 cfm were made, all with synchronized venturis, variously with manual, electric, or automatic hot-air chokes.