The carburetor has two main dosing systems of the 1st and 2nd chambers, an idle system of the 1st chamber with a transition system, a transition system of the 2nd chamber, an economizer of power modes, an econostat, a diaphragm accelerator pump, an automatic device for starting and heating a mixed type, which uses an electrically heated bimetallic spring and the circulation of heated liquid from the engine cooling system, and uses an air damper pneumatic actuator and an electrically heated intake piping device. The carburetor has a pneumatic actuator of the throttle valve of the 1st chamber, which controls its movements in the idle and forced idle modes, as well as a pneumatic actuator of the throttle valve of the 2nd chamber. At the forced idle code, the forced idle economizer is activated.
Carburetor number according to the Audi company catalog - cars with a manual gearbox: 026 129 015; cars with automatic transmission: 026 129 015А.
Intake pipe heater
Current consumption when measured on a car. A: 20-30. Nominal resistance at a temperature of 20°C, Ohm: 0.25-0.50.
Solenoid idle shut-off valve
winding resistance. Ohm: 30-40.
The frequency of rotation of the crankshaft, corresponding to the inclusion of the valve, rpm 1200.
Four-pin coolant temperature sensor (mounted on the left side of the cylinder head).
Intake pipe heater control
Contact closing temperature when measuring between plugs «+» And «R»,°С: < 55.
Contact opening temperature when measuring between plugs «+» And «R».°С: > 65.
Control of the bimetallic spring of the automatic starter and preheater
Contact opening temperature when measuring between plugs «+» And «WITH»,°С: < 33.
Contact closing temperature when measured between plugs «+» And «WITH»,°С: > 42.
Pneumatic valve with thermal time switch
Rated resistance at a temperature of 20-33°C, Ohm: 6.0±1.2.
Temperature,°С: valve opening: below «plus» 4; valve closing: above «plus» 15.
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