The fuel pump supplies fuel from the fuel tank to the carburetor. The models in question use a non-dismountable fuel pump of the Jikov SH 3460 type; the carburetor does not have a manual fuel pumping lever.
The carburetor assembles the air-fuel mixture and doses it in accordance with the current needs of the engine. The models of cars considered in this Manual are equipped with a two-diffusion, two-chamber carburetor with a falling flow of German production Pierburg in the 2E3 version, or its licensed version, manufactured in the Czech Republic and designated Jikov 28-30 LEKR. The opening of the throttle valve of the second chamber in such carburetors occurs by means of a pneumatic drive. The principle of operation of the carburetor is described below in the corresponding Section of this Chapter.
The air sucked into the carburetor first passes through an air cleaner made of thick paper, the filter element of which prevents dust, moisture and other contaminants contained in the air from entering the engine. The housing and cover of the air cleaner are made of plastic. The air intake duct of the housing is connected by means of a rubber sleeve to the air intake located under the right headlight. A hose for supplying heated air from a casing located above the exhaust manifold is connected to the branch pipe on the lower side of the air duct. Inside the air duct, next to the air cleaner housing, there is a thermostat whose task is to adjust the temperature of the air sucked into the carburetor. The thermostat is adjusted to 20÷30°C and controls the position of the air damper, which appropriately doses the supply of heated and cold air.
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