International Truck and Engine High Performance Vehicle Driveability - Ride and Handling

Sutton, Tony; Pope, Rob; Brandewie, Ken; Henry, Jeff

doi:10.4271/2001-01-2787

Cited by 7 publications

(1 citation statement)

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“…This approach, however, is quite sensitive to variations in the vehicle inertial and geometry parameters, and may not be efficient for evaluating the full-vehicle suspension system involving complex couplings among the bounce-, roll-, pitch-and warp-modes. An alternative approach assumes a fixed vehicle body (or sprung mass) to appropriately reduce the contributions of couplings among various vibrations-modes of the vehicle body and therefore facilitate the characterization of stiffness properties of suspension system in individual modes [31,32]. This method can be considered to be more suspension-oriented, and less sensitive to variations in the vehicle inertial parameters.…”

Section: Formulations Of Suspension Propertiesmentioning

confidence: 99%

Roll- and pitch-plane coupled hydro-pneumatic suspension

Cao

Rakheja

2010

Vehicle System Dynamics

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Passive fluidically-coupled suspensions have been considered to offer a promising alternative solution to the challenging design of vehicle suspension system. A theoretical foundation, however, has not been established for fluidically-coupled suspension to facilitate its broad applications to various vehicles. This first part of this study investigates the fundamental issues related to feasibility and properties of the passive full-vehicle interconnected hydro-pneumatic suspension configurations using both analytical and simulation techniques. Layouts of various interconnected suspension configurations are illustrated based on two novel hydro-pneumatic suspension strut designs, both of which provide a compact design with considerably large effective working area. A simplified measure, vehicle property index (VPI), is proposed to permit a preliminary evaluation of different interconnected suspension configurations using qualitative scaling of the bounce-, roll-, pitch-and warp-mode stiffness properties.Analytical formulations for the properties of unconnected and three selected X-coupled suspension configurations are derived, and simulation results are obtained to illustrate their relative stiffness and damping properties in the bounce-, roll-, pitch-and warp-mode.The superior design flexibility feature of the interconnected hydro-pneumatic suspension is also discussed through sensitivity analysis to a design parameter, namely the annular piston area of the strut. The results demonstrate that full-vehicle interconnected hydro-pneumatic suspension could provide enhanced roll-and pitch-mode stiffness and damping, while retaining the soft bounce-and warp-mode properties. Such interconnected suspension thus offers considerable potential in realizing enhanced decoupling among the different suspension modes.3

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Section: Formulations Of Suspension Propertiesmentioning

confidence: 99%