On the New Concept and Advantages of the Integrated Shock Absorber—Air Spring—“Isas”

Abstract

The paper reveal for the first time the novel concept of integrate shock-absorber-air spring, called shortly ISAS, and its advantages based simulations on quarter car model realized with ADAMS software-View module. ISAS is an easy and cheap solution for vehicle trim correction easy-going or in real time, to increase stability, comfort, passing capacity, handling, cruise speed and active security, reducing the risk of undercarriage damage. The novelty is to create a controllable buoyant force under the damper dust shield, by sliding closing the area between dust shield and outer cylinder and filling it with compressed gas/air at proper pressure. Comparative to the known solution realize with rubber sleeve/bellows the new proposed solution is more compact, reliable and resistant at high pressure, thus having possibility to fully eliminate the steel spring, his function being full taken by the air spring device contained by the ISAS product, situation reducing the cost comparative to the classic suspension. The “ISAS” trim corrector, has applicability on front and rear suspension including to the Macpherson solution, each vehicle kind including motorcycles, cars, buses, trucks, trains, military and racing vehicles, improving performances, comfort and transport security. The same the novel trim corrector has applicability in vehicle seats and cabin, increasing the comfort, visibility and thus the transport security. The ISAS solutions are in patent application no. A2015/00368—OSIM Romania. The ISAS concept advantages are demonstrates based simulation on a complex quarter car model equipped with rebound and compression stopper buffers and shock absorber equipped with adjustable pneumatic spring.