Contents: Starting device ⬇ Idle systems ⬇
Starting device
When the control handle is pulled, the choke valve closes and the throttle valve opens slightly as a result of the movement of the control lever and the fast idle cam.
Under the influence of the vacuum created under the air damper when the engine is started, fuel is supplied from the main metering system. Then the air damper opens slightly, overcoming the resistance of the control rod spring. The amount of opening of the air damper is set by a pneumatic drive installed in the throttle body area.
Idle systems
The carburetor has two idle systems: the main and the auxiliary. In the main idle system, the fuel coming from the main fuel jet (see picture), is supplied to the fuel jet 1 of the main idle system. At the outlet of jet 1, the fuel is mixed with air supplied through air jet 2. The emulsion exits under the throttle valve through the gap of the transition system at the throttle valve, passes through the channel, the cross-section of which is regulated by screw 13 of the mixture quality. Further, the fuel-air emulsion enters the outlet channel of the idle system after adjusting screw 10 of the mixture quantity, which is part of the auxiliary idle system. In the auxiliary idle system, fuel is taken from the well directly from the float chamber and supplied to the fuel jet 5 of the idle system and mixed with air supplied by air jet 4 of this system. The mixture passes through the tube of the auxiliary idle system and through the channel, the cross-section of which is regulated by the screw 10 of the mixture quantity, is fed into the throttle space through the outlet opening 9 of the idle system.
Cold engine starting and idle systems:
1 — fuel jet of the main idle system;
2 — main idle system air jet;
3 - main air jet;
4 — auxiliary idle system air jet;
5 — fuel jet of the auxiliary idle system;
6 - air damper;
7 — air damper opening adjustment screw;
8 — pneumatic drive of the air damper;
9 — idle system outlet;
10 — mixture quantity adjustment screw;
11 - screw plug;
12 — throttle valve;
13 — mixture quality (composition) adjustment screw;
14 — main fuel jet.
Weber 32 TL carburetor parts:
1 - carburetor cover;
2 - main air jet;
3 - emulsion tube;
4 — fuel jet of the auxiliary idle system;
5 — fuel jet of the main idle system;
6 - fuel filter;
7 — air damper;
8 — air damper control rod with spring;
9 - main fuel jet;
10 - needle valve;
11 - sprayer;
12 - float;
13 — accelerator pump nozzle;
14 — carburetor body;
15 — accelerator pump diaphragm;
16 — throttle control lever;
17 — throttle body;
18 — throttle valve;
19 — adjusting screw for idle mixture quality (composition);
20 — idle mixture quantity adjusting screw;
21 — power mode economizer diaphragm;
22 — pneumatic drive of the air damper.
Visitor comments