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Throttle Position (TP) sensor
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Electronic intake manifold valve
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Solenoid valve - intake manifold switchover system
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Swirl valve solenoid valve
The intake manifold is made of plastic and is fitted with swirl valves and an intake manifold switchover system.
Each plate is actuated by its own dedicated vacuum motor. The required vacuum is switched by a solenoid valve.
The solenoid valves are actuated by the powertrain control module (PCM). The engine speed and engine load are used as input signals.
An electronic intake manifold valve is also used.
The housing of the electronic intake manifold valve is heated by the coolant circuit by means of a connection above the base of the air shutoff throttle. This prevents the intake manifold valve from icing up.
The coolant connection of the exhaust gas recirculation (EGR) stepper motor is connected to the housing of the electronic intake manifold valve. At the other end of the electronic intake manifold valve housing, the coolant connection is connected with the feed pipe to the heat exchanger.
Swirl valves
The swirl valve system from the Mondeo remains unchanged.
The swirl valves reduce the cross section of the intake ports in the lower engine speed range, thereby swirling the intake air.
The improved swirl of the fuel/air mixture makes the fuel/air mixture easier to ignite. Fuel consumption and exhaust emissions are reduced as a result.
The plates are adjusted by means of a vacuum motor on the intake manifold.
The swirl valves are closed when the engine is not running.
Intake manifold switchover system
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Flaps - intake manifold switchover system
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Intake manifold switchover vacuum motor
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Swirl valve vacuum motor
The flaps of the intake manifold switchover system allow the length of the inlet tract to be varied in order to allow engine speed dependent resonance charging of the cylinder.
The flaps of the intake manifold switchover system are open when the engine is not running.
When the engine is started the vacuum generated is applied via the solenoid to the vacuum motor of the intake manifold switchover flaps.
The flaps of the intake manifold switchover system are closed.
Now the inlet air is exclusively obtained through the cylinder specific inlet port from the intake manifold.
When engine speed is increased to around 4500 rev/min, the flaps of the intake manifold switchover system are opened.
When engine speed is reduced to around 4300 rpm, the flaps of the intake manifold switchover system are closed.
This allows the inlet air to flow out of the other intake pipes, via the cylinder specific intake pipe and the cylinder specific flap of the intake manifold switchover system.
