Adding flow channel between main and annular chambers in same strut of roll-coupled Hydro-pneumatic Inter-connected Suspension (HIS) can effectively avoid the negative hydraulic pressure caused by the high damping factor of connected pipes under high velocity condition. This flow channel is usually closed in previous research in HIS area. In this study, the effect of orifice between main and annular chambers in same strut to the dynamic properties of HIS under the different road excitations is investigated by the established AMEsim half-car simulation model. The bounce and roll displacement/acceleration of the sprung mass are used to evaluate the dynamic properties of HIS. The results illustrate that (1) the added orifice can reduce the roll displacement/acceleration with slight influence on the vertical displacement/acceleration under the transient and road loop excitations; (2) the added orifice will not change the resonance frequency of the bounce and roll modes; (3) comparing with the traditional HIS design (without the added orifices), the maximum roll transmissibility can decrease 30.17% with 2.89% increase of the maximum vertical transmission for the added orifice with 2 mm² area. Overall, the results suggest that the proper size of the orifices will significantly increase the roll-stability properties with slight effect on the bounce mode under the road excitations.

在滚压耦合式液压气动互连悬架（HIS）的同一支柱中，在主腔和环形腔之间增加流道，可有效避免高速条件下连接管道的高阻尼系数引起的负液压。该流道在以往的研究中通常是封闭的。在本研究中，通过建立的AMEsim半车仿真模型研究了在不同道路激励下，同一支柱主腔室和环形室之间的孔口对HIS动力学特性的影响。簧载质量的弹跳和滚动位移/加速度用于评估 HIS 的动态特性。结果表明：（1）在瞬态和道路环路激励下，增加的孔口可以减少侧倾位移/加速度，对垂直位移/加速度影响很小；(2)增加的节流孔不会改变弹跳和横滚模式的共振频率；(3) 与传统的HIS设计（不加孔口）相比，最大滚子传递率可降低30.17%，加孔口增加2.89%，最大垂直传递率增加2.89%²区。总体而言，结果表明，适当尺寸的孔口将显着提高滚动稳定性，对道路激励下的弹跳模式影响很小。