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This study investigates the ride-comfort performance of an electric vehicle (EV) equipped with an air suspension (AS) compared with a conventional coil-spring suspension (CSS). Two full-dynamic vehicle models were developed and simulated under full-load conditions. Ride comfort was evaluated using frequency-weighted root-mean-square (RMS) accelerations of the vertical body response awbz, pitch awbphi and roll awbteta following ISO 2631-1:1997. A representative case with an ISO 8608 class-B road profile at a speed of 80 km/h was analyzed in detail, and variations under multiple operating conditions were also examined. The results show that the AS system configuration significantly reduces the peak vehicle-body acceleration responses compared with the CSS. Specifically, the frequency-weighted RMS metrics decrease by 31.6%, 22.0% and 23.7% for awbz, awbphi and awbteta, respectively, under full-load conditions. These findings demonstrate that the AS system substantially enhances EV ride comfort and provides superior vibration-isolation performance across typical road classes. Future work will focus on optimizing suspension parameters and developing advanced control algorithms to further improve AS effectiveness.

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Improved Ride Comfort in Electric Vehicles: A Comparative Study of Air and Traditional Suspensions

  • 会议论文

  • 发表日期：

    2026年

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  • Tran The Tran,
  • Ma Thi Huyen Trang,
  • Tran Duc Hoang,
  • Nguyen Tien Han,
  • Vu Thi Hien,
  • Le Van Quynh

摘要

This study investigates the ride-comfort performance of an electric vehicle (EV) equipped with an air suspension (AS) compared with a conventional coil-spring suspension (CSS). Two full-dynamic vehicle models were developed and simulated under full-load conditions. Ride comfort was evaluated using frequency-weighted root-mean-square (RMS) accelerations of the vertical body response awbz, pitch awbphi and roll awbteta following ISO 2631-1:1997. A representative case with an ISO 8608 class-B road profile at a speed of 80 km/h was analyzed in detail, and variations under multiple operating conditions were also examined. The results show that the AS system configuration significantly reduces the peak vehicle-body acceleration responses compared with the CSS. Specifically, the frequency-weighted RMS metrics decrease by 31.6%, 22.0% and 23.7% for awbz, awbphi and awbteta, respectively, under full-load conditions. These findings demonstrate that the AS system substantially enhances EV ride comfort and provides superior vibration-isolation performance across typical road classes. Future work will focus on optimizing suspension parameters and developing advanced control algorithms to further improve AS effectiveness.