Features of the device
The fuel-air mixture enters the combustion chambers of the engine from the carburetor. Fuel is supplied to the carburetor by a fuel pump from the fuel tank, and air comes from the atmosphere through an air filter with a thermostat. The throttle control drive is foot-operated, cable-operated; air damper - semi-automatic starting device (on GLA, GMA and GPA models since July 1983 manual drive). Carburetors of engines of all models, except GLA and GMA, are equipped with a thermal vacuum device for controlling mixture formation and ignition advance angle at accelerated idle speed (Fig. 2.73).
Fig. 2.73. Thermal vacuum device for maintaining accelerated idle speed.
1 - thermal vacuum valve; 2 — fast idle speed control valve; 3 — ignition timing delay valve; 4 - three-way thermal valve; 5 - vacuum hoses; 6 - air hoses; 7 - coolant hoses.
