Chrysler PT Cruiser. Manual - part 223
DESCRIPTION - SWIRL VALVE ACTUATOR
SOLENOID
The swirl actuator solenoid is mounted next to the
coolant
recovery
pressure
container
behind
the
wastegate solenoid (Fig. 20).
OPERATION
OPERATION - INTAKE MANIFOLD SWIRL
VALVE
A swirl and a charge inlet port are provided in the
intake manifold for each cylinder (Fig. 21). The
charge inlet port can be closed by means of flaps. The
flaps are connected to each other by means of a link-
age, which is operated by the swirl valve actuator
(Fig. 21). They are held in the open position by
means of spring force.
In the lower engine speed and load range all the
charge inlet ports are sealed off by the flaps. The
entire air flows through the swirl inlet ports only.
This results in high air swirling which in turn pro-
duces more effective mixing of the fuel with the air,
which improves combustion and reduces the amount
of soot particulants in the exhaust.
As engine speed and loads rise, the charge inlet
ports are continuously opened to obtain the best pos-
sible ratio between air swirling and air mass for each
engine operating point, which will optimize exhaust
characteristics and engine power output.
The position of the flaps in the charge inlet ports is
determined by the map stored in the Engine Control
Module (ECM). The swirl valve actuator is actuated
by the swirl valve actuator solenoid. This is a PWM
solenoid.
OPERATION - SWIRL ACTUATOR SOLENOID
The swirl actuator solenoid is used to control the
amount of vacuum supplied to the swirl valve
actuator.
Fig. 20 SWIRL ACTUATOR SOLENOID
1 - SWIRL ACTUATOR OUTPUT HOSE
2 - WASTEGATE SOLENOID
3 - SWIRL ACTUATOR SOLENOID
Fig. 21 INTAKE MANIFOLD SWIRL VALVE
COMPONENTS
1 - CHARGE INLET PORT
2 - FLAP
3 - VACUUM PORT FROM SOLENOID
4 - SWIRL VALVE ACTUATOR
14 - 30
FUEL INJECTION
PT
SWIRL ACTUATOR (Continued)