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FUEL SYSTEM/CARBURETION
4.7
FLOAT SYSTEM
Fuel enters the float chamber (3) by means of the inlet
pipe and passage, through a screen on the back of the
inlet needle seat (4), and around the inlet needle (2).
As the fuel fills the float chamber, the float (1) rises and
forces the inlet needle against the seat, shutting off
the orifice in the seat. When fuel level is up in float
chamber, floats are up and needle valve remains
pushed up against valve seat. Under this condition,
no fuel enters the float chamber. As the fuel level falls,
floats go down and needle valve unseats itself to
admit fuel into the chamber. In this manner, the
needle valve admits and shuts off fuel alternately to
maintain a practically constant fuel level inside the
float chamber.
Inlet
Pipe
1
4
2
3
MAIN SYSTEM
As throttle valve (1) is opened, engine speed rises,
and this increases negative pressure in the venturi.
Consequently the vacuum slide (2) moves upward.
The fuel in float chamber (3) is metered by main jet (4),
and the metered fuel enters needle jet (5), in which it
mixes with the air admitted through main air jet (6) to
form an emulsion. The emulsified fuel then passes
through the clearance between needle jet (5) and jet
needle (7), and is discharged into the venturi (A).
Mixture proportioning is accomplished in needle jet
(5); the clearance through which the emulsified fuel
must flow is determined ultimately by throttle position
and vacuum slide height.
1
A
5
4
3
6
7
2
Содержание 600 Dragon SP
Страница 1: ...2004 SPORTSMAN 600 700 SERVICE MANUAL PN 9918803 ...
Страница 138: ...BODY STEERING SUSPENSION 5 16 NOTES ...
Страница 210: ...FINAL DRIVE 7 38 NOTES ...
Страница 293: ...ELECTRICAL 10 43 WIRING DIAGRAM HAND AND THUMB WARMERS WINCH HUNTER EDITION ...
Страница 294: ...ELECTRICAL 10 44 NOTES ...
Страница 295: ...ELECTRICAL WIRING DIAGRAM EARLY 2004 SPORTSMAN 600 700 BUILT BEFORE FEB 20 2003 Built Before February 20 2003 ...
Страница 297: ...ELECTRICAL WIRING DIAGRAM LATE 2004 SPORTSMAN 600 700 BUILT AFTER FEB 20 2003 Built After February 20 2003 ...
Страница 298: ...ELECTRICAL WIRING DIAGRAM LATE 2004 SPORTSMAN 600 700 BUILT AFTER FEB 20 2003 Built After February 20 2003 NOTES ...
Страница 299: ...ELECTRICAL WIRING DIAGRAM LATE 2004 SPORTSMAN 600 700 MODELS WITH FUEL GAUGE Models Equipped with Fuel Gauge ...
Страница 300: ...ELECTRICAL WIRING DIAGRAM LATE 2004 SPORTSMAN 600 700 MODELS WITH FUEL GAUGE NOTES ...
Страница 301: ...ELECTRICAL WIRING DIAGRAM 2004 SPORTSMAN 600 700 HUNTER EDT HAND WARM WINCH ...
Страница 307: ...Winch Switch Installation 10 34 Winch Wiring 10 35 Wiring Diagram Hand Thumb Warmer Winch 10 43 ...
Страница 308: ...PN 9918803 Printed in USA ...