Lotus TURBO ESPRIT Service Manual page 341

SECTION LA
Page 3
LA.2.
-
CARBURETTOR T H E O R Y OF OPERATION
C a r b u r e t t o r Type
-
Standard Engines
-
D e l l o r t o D H L A 45E
-
'H.C.' E n g i n e s
-
D e l l o r t o D H L A 45D
Fuel Supply
Fuel from the union
(1)
posses through the filter
(2)
and reaches the needle valve
seat
(1 8),
where the needle valve
(1
7)
attached to the float (15), controls the
fuel flow into the float chamber, thereby maintaining a constant level.
The float chamber
i s
vented to atmosphere (via the airbox) through the hole
(4)
i n the chamber
(3).
Starting
With the choke valve
(8)
opened fuel
metered through jet (14) passes into the
emulsion tube (13), where i t mixes with
air from the channel (16), communicating
with the float chamber top through hole
(6). The mixture formed flows, through
holes
(7),
into the valve chamber
(9),
further mixing with air from the two
channels
(5).