Active Tuned Absorber for Displacement-On-Demand Vehicles

In recent years, the Noise & Vibration (N&V) engineers have been exacerbated by the trend towards lighter, and more fuel-efficient vehicles such as Displacement-On-Demand (DoD) vehicles. This paper discusses how the active tuned absorber (ATA) technology can reduce vibrations caused by engines in Displacement-On-Demand vehicles. Because the higher combustion pressure per cylinder and the halved basic engine order of a V6 engine powered vehicle in the three-cylinder operation cause the vibration amplitude increased. The passive engine mounts cannot adequately address the excessive vibration. The ATA is an electromagnetic actuator. This work investigates the potential of using an active vibration control algorithm with ATA technology to reduce the unwanted vibration. The rear bank of the cylinders in the V6 engine from the development vehicle is disabled for this study. Several actuator configurations are investigated and feedforward control algorithm is used for the investigation. Test results show the ATA technology can significantly reduce the vibration during three-cylinder drive.