General information about the carburetor power system

The carburetor power system arranges the air-fuel mixture and supplies it to the engine combustion chambers. The main components of the power system are the fuel tank, gasoline pump, carburetor, intake manifold, connecting fuel lines and air cleaner.

The fuel pump supplies fuel from the fuel tank to the carburetor. On the models under consideration, a non-separable gasoline pump of the Jikov SH 3460 type is used; the carburetor does not have a manual fuel pumping lever.

In the carburetor, the air-fuel mixture is configured and dosed in accordance with the current needs of the engine. The car models considered in this Guide are equipped with a two-diffusion, two-chamber carburetor with a falling flow of the German production Pierburg in the performance of 2E3, or its licensed version, produced in the Czech Republic and having the designation 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 relevant 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 body and cover of the air cleaner are made of plastic. The intake air duct of the housing is connected by means of a rubber sleeve to the air intake located under the right headlight. A sleeve 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.