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Frequency bandwidth is a critical property of engine test benches, and is becoming the longer the more important especially in view of hybrid vehicle applications. A critical limiting factor of the bandwidth is the damping of the connection between engine and brake. To overcome this limit, a setup consisting of a stiff connection and an active rejection of the torque ripple has been proposed. Based...
Innovative automotive gasoline engines are equipped with new actuators, such as the variable valve timing (VVT), besides the traditional electronic throttle (ETC) and exhaust gas recirculation (EGR). All these actuators can be used to optimize the engine performance in terms of reduced fuel consumption and pollutant emissions. In turn, their presence makes the control of the engine a difficult task...
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