Air Intake Components - Suzuki DF 60 Service Manual

3-20 ENGINE CONTROL SYSTEM

AIR INTAKE COMPONENTS

Air, after entering through the silencer, passes through the throttle body and flows into the surge tank where
it is then distributed to the cylinder intake manifold.
Intake manifold pressure, monitored by the MAP sensor, is an indirect measure of the intake air amount.
When the throttle is fully closed, the main supply of intake manifold air necessary to sustain the engine idle
passes through the by-pass air passage.
To maintain the engine idle speed at the specification, the ECM controlled the IAC valve supplies a regulated
amount of additional air through the IAC (idle air control) passage.
Throttle body
Silencer cover
Flame arrester
THROTTLE BODY
The throttle body adjusts the intake air amount with the throttle
valve which is connected to the throttle / linkage lever. The CTP
(closed throttle position) switch is installed on the bottom of the
throttle body. The CTP switch informs of a throttle valve position.
NOTE:
Do not try to adjust or remove any of the throttle body compo-
nent parts (CTP switch, throttle valve, throttle / linkage lever, etc.).
These components have been factory adjusted to precise speci-
fications.
IAC valve silencer
IAC passage
IAC valve
(Plunger)
Silencer
MAP sensor
Intake manifold
(Surge tank)
By-pass air passage
By-pass air screw
Throttle
valve
Linkage lever
AIR FLOW
CTP switch
Throttle lever