SUSPENSION SYSTEM WITH ENHANCED STABILITY

摘要

A suspension system including a vehicle chassis, first and second axles and first and second longitudinal assemblies. The longitudinal assemblies include leaf springs secured relative to both of the axles. Air springs are positioned between the longitudinal assemblies and the vehicle chassis. First and second lift limiting members limit the vertical separation between the first and second longitudinal assemblies and the vehicle chassis within a respective limited range having a predetermined maximum limit. The suspension system also includes first and second spring members coupled with the first and second longitudinal assemblies. The spring members exert a biasing force respectively urging the longitudinal assemblies away from the vehicle chassis for only a part of the limited ranges of vertical separation between the longitudinal members and the vehicle chassis.