Modeling and control of the air path system in turbocharged gasoline engine

Turbocharging technology has been widely used in automotive products for improving the power of the vehicle effectively. In this paper, a physics-map mixed air path model of turbo-gasoline engine is proposed. The accuracy of the proposed model is validated by the engine dynamics simulation software enDYNA. Then, an air path control system which contains torque based throttle control and intake manifold pressure control is deduced to coordinate the throttle and wastegate for satisfying the torque demand and the limitation of intake manifold pressure. And a control strategy is proposed in order to fully utilize turbocharger. Finally, the simulation results show the effectiveness of the control system.

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