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Fig. 9: 1. Throttle actuator lever. 2. Throttle control lever (rigidly fixed to the valve axis). 3. Return spring of levers. 4. Rod connecting the air and throttle valve drives. 5. Lever limiting the opening of the second chamber throttle valve. 6. Lever connecting with the air valve. 7. Pneumatic actuator rod. 8. Lever connected to lever 9 via a spring. 9. Lever rigidly fixed to the axis of the second chamber throttle valve. 10. Screw limiting the closing of the second chamber throttle valve. 11. Second chamber throttle valve. 12. Second chamber transition system holes. 13. Throttle valve housing. 14. Carburetor housing. 15. Pneumatic actuator diaphragm. 16. Second chamber throttle valve pneumatic actuator cover. 17. Second chamber transition system fuel jet housing. 18. Carburetor cover. 19. Small mixing chamber diffuser. 20. Well of main air jets of main metering systems. 21. Main metering system sprayer. 22. Air damper. 23. Air damper shaft lever. 24. Air damper drive telescopic rod. 25. Rod connecting the air damper shaft lever to the rack. 26. Starter rack. 27. Starter housing. 28. Starter cover. 29. Air damper drive cable fastening screw. 30. Three-arm lever. 31. Return spring bracket. 32. Microswitch. 33. Crankcase gas suction pipe. 34. Adjusting screw of the starting device. 35. Diaphragm of the starting device. 36. Air jet of the starting device. 37. Communication channel of the starting device with the throttle space. 38. Air jet of the idle system. 39. Accelerator pump sprayer. 40. Emulsion jet of the economizer. 41. Air jet of the economizer. 42. Fuel jet of the economizer. 43. Main air jets. 44. Emulsion tube. 45. Needle valve of the float chamber. 46. Fuel filter. 47. Fuel supply pipe to the carburetor. 48. Float. 49. Main fuel jet of the first chamber. 50. Screw for adjusting the fuel supply of the accelerator pump. 51. Accelerator pump bypass jet. 52. Accelerator pump drive cam. 5z. First chamber throttle valve return spring. 54. Accelerator pump drive lever. 55. First chamber throttle valve closing limiting screw. 56. Accelerator pump diaphragm. 57. Spring cap. 58. Idle system fuel jet housing. 59. Idle mixture composition (quality) adjusting screw (with limiting sleeve). 60. Pipe connected to the vacuum regulator of the ignition distributor. 61. Pipe connected to the pneumatic valve. 62. Adjusting screw for the amount of idle mixture.
The first releases of VAZ-2105, VAZ-2104 cars were equipped with carburetors of the 2105-1107010 model, which differ from the previously produced serial carburetors by the installation of a microswitch 32 of the forced idle economizer. Since 1985-87, carburetors 21051-1107010 designed by the Solex company have been installed.
The calibration data for the carburetor 2105-1107010 are given in the table.
Carburetor 2105-1107010 emulsion type, two-chamber, with a falling flow. The throttle valve of the first chamber is opened from the carburetor control pedal in the body cabin. The valve of the second chamber opens automatically from a pneumatic drive. The carburetor has a balanced float chamber, two main metering systems, a diaphragm starting device, an economizer (econostat) with a pneumatic drive, a diaphragm accelerator pump with a mechanical drive, an idle system with a transition system of the first chamber, a transition system of the second mixing chamber, an economizer of forced idle with electronic control by the engine crankshaft speed. The carburetor is equipped with a slide valve crankcase ventilation device.
The 2105-1107010 carburetor consists of three body parts: the carburetor body 14, the carburetor cover 18 and the throttle body 13. The cover 18 contains the inlet necks of the first and second chambers, a well 20 for supplying air to the main air jets 43 and a channel connecting the cavity of the float chamber with the cavity behind the filter element of the air filter.
The air filter housing is installed on four studs screwed into the cover 18. The air damper 22 of the starting device is installed in the inlet neck of the first chamber. The fuel supply needle valve 45, float 48, fuel filter 46, and pipe 47 for supplying fuel to the float chamber are installed in the cover 18. The economizer channels are made in the cover 18 (econostat) with emulsion 40, air 41 and fuel 42 jets pressed into the cover. The body 27 of the starting device with the cover 28 and diaphragm 35 assembled with the rack 26 is attached to the cover 18. The carburetor cover is attached to the body with five screws and sealed with a gasket.
Since the float is fixed to the carburetor housing cover, when it is removed to regulate the fuel level, it is removed from the cavity of the float chamber, and the fuel level changes (in relation to the level on the assembled carburetor). Since direct measurement of the fuel level in the float chamber is not technologically feasible in mass production, this parameter is not used in the manufacture of carburetors for VAZ engines.
The correct setting of the fuel level in operation is determined by the size of the gap (6.5±0.25 mm) between the float and the mating surface of the cover, with the installed gasket, while the cover must be installed vertically with the fuel supply pipe 47 upward, and the float tongue must touch the ball of the needle valve without sinking it. According to the conditions of such regulation, the gasket can be separated from the cover only after removing the float, which must be taken into account when dismantling the cover. A similar regulation system is adopted on carburetors designed by Weber and Solex.
When adjusting the fuel level, it is necessary to first make sure that the mass of float 48 assembled with the lever is 1113 g, the float is not damaged and rotates freely on the axis. To obtain the required clearance, bend the tongue, which should be perpendicular to the valve axis. The float stroke should be 8 mm. If necessary, achieve by bending the float lever stop.
In the body 14 of the carburetor large diffusers are cast, easily removable small diffusers are installed, manufactured integrally with the sprayers of the main metering systems and the sprayer of the economizer. The channels of the main metering systems, the idle system, the transition system, the accelerator pump, the channel 37 of the connection of the starting device with the throttle space are made in the body. The sprayer 39 with the valve of the accelerator pump, the main air jets 43, the emulsion tubes 44, the body 58 of the idle fuel jet, the body 17 of the fuel jet of the transition system of the second chamber, the main fuel jets 49, the air jet 38 of the idle system, the bypass jet 51 of the accelerator pump, the screw 50 of the regulation of the fuel supply by the accelerator pump and the jets of the pneumatic drive of the throttle valve of the second chamber are installed in the body 14.
The accelerator pump cover with the drive lever 54 in assembly and the working diaphragm 56 are fastened with four screws to the lug of the housing, which forms the working cavity of the accelerator pump. The three-arm lever 30 and the housing of the pneumatic drive of the throttle valve 11 of the second chamber are fastened to the housing 14. The branch pipe 33 for sucking out crankcase gases is pressed into the housing. The adjusting screw 55 is installed in the lug of the housing, limiting the closing of the throttle valve of the first chamber.
In the housing 13 throttle valves are installed the valves of the first and second chambers. On the axis of the valve of the first chamber are installed: lever 1 of the drive of the throttle valves from the pedal; lever 5, limiting the opening of the second chamber throttle valve, lever 6 for connecting with the air damper, lever 2 for controlling the throttle valves (opening begins after the stop of lever 2 selects the gap in the groove of lever 1) and cam 52 of the accelerator pump drive. Under lever 2 in the throttle body, a spring and a valve of the crankcase ventilation system are installed, access to which opens after unscrewing the nut and removing all the levers.
On the axis of the throttle valve 11, a lever 9 is installed, rigidly fixed to the axis, a lever 8 of the throttle valve drive, connected via a spring to the lever 9 and to the rod 7 of the diaphragm of the pneumatic drive.
Lever 9 is provided with a protrusion interacting with the finger of lever 5, which, when the throttle valve of the first chamber is abruptly closed, forces the throttle valve of the second chamber to be forcibly closed due to the action of the return spring.
The cover of the forced idle economizer with the branch pipe 61 is fastened to the housing 13 with screws. A diaphragm is installed under the cover, which forms a working cavity located between the cover and the diaphragm. The diaphragm is connected to the economizer needle, placed in a seat pressed into the housing 13.
The engine idle speed is regulated by adjusting screws: screw 62 of the mixture quantity, which regulates the amount of movement of the forced idle economizer needle, and screw 59 of the mixture composition (quality). To prevent the owner from violating the factory carburetor adjustment, restrictive plastic bushings are pressed onto screws 59 and 62, allowing the screws to be turned only half a turn (idle speed adjustment). At car service stations, regulation is performed based on the carbon monoxide (CO) content in the exhaust gases. If the bushings fail to perform regulation, the limiting bushings are unscrewed, broken, and regulation is performed using screws 59 and 62. After the regulation is complete, new limiting bushings are pressed on. Blue bushings are installed at the car factory, and red bushings are installed at car service stations.