Carburetor — general information

The first chamber of the carburetor operates under normal load, the second chamber turns on when the engine is running at full load. The throttle valve is actuated by a vacuum device due to the vacuum produced in the air diffuser.

All jets and air holes are factory-selected to achieve the best power under all conditions. For this reason, the caliber of the jets should not be changed, however, certain changes can be made, for example, when boosting the engine, in which case it is necessary to know which jets should be replaced. A higher number on the jet indicates a larger orifice, so the main jet and idle jet with a higher number give a richer mixture, while the larger air jets give a leaner mixture. The carburetor has the following features:

The throttle valve of the second chamber is actuated by a vacuum device due to the vacuum produced in the air diffuser. The vacuum channel is located in the air diffusers of the first and second chambers and the membrane is actuated by the total vacuum.

The accelerator pump is used for good acceleration of the car. This is a piston pump that is connected to a throttle valve. The accelerator pump works together with the control valve.

The high power valve is actuated by vacuum inside the throttle valve and improves fuel delivery at high speeds. With a carburetor installed, this valve is replaced by a mixture quality control valve.

The installed throttle damper ensures soft closing of the throttle when the gas pedal is released.

The carburetor is equipped with starting automatics. It is heated by an electric heating element.

The control valve serves to increase the idle speed, i.e., for example, with the servo control installed, it is ensured that the idle speed is kept constant and does not decrease with an additional load on the engine. For this, a separate idle jet is installed, which is located next to the regular idle jet.

The electric fuel cut-off valve cuts off the fuel supply to the carburetor when the rear wheels are coasting.