INTAKE SHUTTER VALVE CONTROL [SKYACTIV-D 1.5]

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Outline

• The PCM controls the intake shutter valve when the following controls are performed.

― EGR control: Due to the difficulty in generating a pressure difference between the intake and exhaust during light engine-loads, the exhaust gas recirculation is corrected by the HP-EGR by closing the intake shutter valve and pressurizing the intake manifold.

― DPF regeneration control: Intake air is reduced during DPF regeneration control to cause the exhaust gas temperature to increase more easily.

― During deceleration: Intake air is reduced so that the catalyst temperature is not lowered by the incoming outside air.

Block Diagram

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Operation

During EGR control

• The PCM controls the intake shutter valve to the optimum opening angle based on the engine speed, fuel injection amount, and intake air amount.

During DPF regeneration control

• The PCM controls the intake shutter valve to the optimum opening angle based on the engine speed, fuel injection amount, exhaust gas temperature, and intake air amount.