SWIRL CONTROL VALVE [SKYACTIV-G 1.5(with EGR cooler)]SM3020927
SWIRL CONTROL VALVE [SKYACTIV-G 1.5(with EGR cooler)]

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Purpose, Function

• By closing the swirl control valve, a transverse vortex (swirl) is generated in the cylinder during the intake stroke.
• The generated swirl promotes the formation of a mixture of fuel, intake air, and exhaust gas recirculated by the EGR. Additionally, by concentrating the mixture in the area around the spark plug, combustion stability is ensured and lean combustion is achieved, resulting in improved fuel efficiency.

Construction

• The swirl control valves are located in the intake manifold.
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• The swirl control valve consists of the following parts.
― Valve
― Swirl control valve actuator
― Swirl control valve position sensor
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• The swirl control valve is integrated with the shaft.
• A swirl control valve is located on one side of the 2 intake ports for each cylinder to generate an effective swirl in the cylinder.

Operation

• The swirl control valve opens/closes the valves by operating the swirl control valve actuator.
• The swirl control valve actuator adjusts the swirl control valve opening angle based on the control signal from the PCM.
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• The swirl control valve opening angle is detected by the swirl control valve position sensor.
• To generate swirl in the low-to-mid engine speed range, the swirl control valve actuator is energized to control the opening angle of the swirl control valve.
• In the high engine speed range, the swirl control valve is opened to assure the intake air amount.
• For details on the swirl control valve position sensor, refer to the CONTROL SYSTEM. (See SWIRL CONTROL VALVE POSITION SENSOR [SKYACTIV-G 1.5 (WITH EGR COOLER)].)