Peugeot405
1. The maintenance instruction
2. Maintenance service
3. Engines
4. Fuel system
    4.1. Fuel system with the carburettor
      4.1.1. The fuel pump
      4.1.2. The gauge of level of fuel in a tank
      4.1.3. A fuel tank
      4.1.4. Removal and carburettor installation
      4.1.5. Carburettor dismantling
      4.1.6. Carburettor work
      4.1.7. Carburettor adjustment
      4.1.8. Starting arrangement OVAD
      4.1.9. The subsequent cooling of the engine
      4.1.10. An inlet collector
      4.1.11. A final collector
    4.2. One-dot systems of injection of fuel
    4.3. Multidot systems of injection of fuel
5. Systems of greasing, cooling
6. Release system
7. Coupling
8. Transmissions
9. Power shafts
10. A steering
11. Suspension brackets
12. Brake system
13. A body
14. An electric equipment





4.1.6. Carburettor work
THE GENERAL DATA

Start of the cold engine

Air заслонка it is closed owing to work of the element extending under the influence of heat. During start разряжение the engine causes intensive всасывание fuel at the reduced quantity of air. After engine start the vacuum starting arrangement, influencing the traction mechanism, causes приоткрывание air заслонки. Throttle заслонка it is a little slightly opened (additional opening) so that to receive idling with the raised speed of rotation of the engine.

During warming up of the engine the element extending under the influence of heat, heats up a cooling liquid and to a lesser degree influences the starting arrangement.

Idling

Throttle заслонка it is closed, fuel arrives through the main fuel jet and reaches a fuel jet of idling where forms a mix with air. The quantity of a submitted mix can be regulated by the screw of structure of a mix.

The special crack (aperture of so-called smooth transition) allows to avoid sudden pauperisation of a mix during time приоткрывания throttle заслонки 1 chamber.

In 2 chamber the system of smooth transition feeds a special contour. The tube supplied with a jet, is shipped in поплавковой to the chamber. On its end in a cover the special air jet submits air, and the mix reaches a place приоткрывания throttle заслонки. The second chamber has no idling system.

Normal work

Fuel moves through the needle valve in поплавковую the chamber in which the float established on an axis operates opening of the needle valve so that to support constant level of fuel. Fuel leaves from поплавковой chambers through the main fuel jet and moves in a well. The first chamber is opened, fuel is soaked up and mixes up with air in эмульсионных tubes. The mix moves to диффузору where there is a dispersion. The same process occurs and in the second chamber when its throttle заслонка it is opened.

Acceleration

During opening throttle заслонки the first chamber the cam established on its axis, pushes the lever influencing by means of supplied амортизирующей by a spring of a pusher on a diaphragm of the pump. Fuel is injected (simultaneously in two chambers) through a spray. During closing throttle заслонки in the pump chamber fuel from поплавковой chambers is sucked in. Ball returnable the valve divide contours засасывания and перекачивания.