A New Generation of Vibration Isolation for the Conventional Truck Cab

A new concept in conventional truck cab vibration isolation has been developed by Holland Neway International. The system provides a significant improvement in ride comfort for the truck cab occupants in the truck of the twenty-first century. The single point isolator incorporates inclined sleeve type air springs to achieve a very low natural frequency, typically 0.9 - 1.1 hertz. A unique variable geometry damping system is used in conjunction with the sleeve springs to allow the configuration to achieve significant improvements in vibration isolation. The passive variable geometry control operates essentially undamped until large displacement disturbances are encountered allowing maximum possible isolation performance.

Since the isolator natural frequency occurs in a region where the human physiology is most tolerant of vibratory motion, a high level of ride comfort is achieved. The increased comfort is specifically noted during tractor-trailer pitch, the most annoying of the typical ride vibratory modes.

The physical hardware has been developed to be compatible with the majority of the large sleeper cabs in the industry today, especially for the low damage tolerant aluminum and composite cab structures.