Zenith carburetor

Zenith carburetor

1. Zenith Carburetor
RampalSingh
B.E. (Mechanical), M.Tech(Production Engineering),
Thrice GATE Qualified

2. •Following are the list
of components in a
Zenith Carburetor :-
1) Float Chamber
2) Main Line
3) Main Jet
4) Compensating Jet or
Auxiliary Jet
5) Starting Jet
6) Reservoir or
Auxiliary Chamber
7) Choke
8) Throttle Valve

3. Working at low speed
•High pressure in fuel chamber, low pressure in venture, fuel flow from
higher pressure to lower pressure
•This mixture has a ratio of 15:1 where air is 15 and fuel is 1
•Then this mixture reaches the engine after passing through the
throttle valve which is opened very little at low speed
•hen this mixture reaches the engine after passing through the throttle
valve which is opened very little at low speed.

4. Working at high speed
•At high speed of vehicle the speed of engine increases, hence
producing higher suction
•Compensating jet supplies extra fuel required

5. At starting
•At time of starting, throttle valve is almost at closed position
•air passes through the gap, velocity of air increases and pressure of
air decreases on the upper side of throttle valve and thereby
producing suction effect at Starting jet which is placed at top of
throttle valve
•This starting jet also gets fuel from the same reservoir from where the
compensating jet gets fuel. Then fuel is sprayed by starting jet and
mixes with air present above throttle valve to form a rich mixture
•The ratio of air to fuel in this rich mictureis 11:1. This rich mixture
reaches the engine and helps the engine to start.