Equivalent Stiffness and Equivalent Position for Torque Strut Mount in Powertrain Mounting System

The torque strut is a key mount in three-point pendulum mounting system of powertrain. Its equivalent stiffness in two orthogonal directions is close to zero meanwhile the equivalent stiffness in another direction always remains the same as the original stiffness, which facilitates mounting system design and matching and has been widely used. In this article, it is aimed to answer the issues for the equivalence of torque strut mount theoretically, such as the equivalent linear stiffness, equivalent torsional stiffness and equivalent position. The torque strut mount has been simplified to an equivalent ordinary mount, the equivalent linear stiffness and equivalent torsional stiffness are derived, and has been verified by ADAMS, then the equivalent position is discussed. The effect of the mass of torque strut on powertrain modals is investigated. An equivalent model of powertrain mounting system with equivalent stiffness at equivalent position for torque strut is established, the results of the nature characteristics show that the equivalent torque strut model is usable in engineering.