Although there are obvious benefits to the use of small commuter vehicles which could permit the increase in the number of lanes on multilane roadways and an increase in numbers of vehicles in existing parking facilities, it is not easy to maintain performance and safety if conventional vehicles are simply scaled dwon. A half-width vehicle with side-by-side seating has little room for side impact protection and must be low to the ground to prevent overturning during hard cornering. The present paper deals with a new class of narrow but relatively tall vehicles with tandem seating and with an active titling system to lean them to the inside of turns. A lower body on four wheels contains the drive system while the passenger compartment mounts on the lower body and tilts in turns like a motorcycle. The analytical and computational studies reported upon here focus on the dynamics of the vehicle and the tilt control systems. No special skill is required of the driver since the titling is controlled either directly by a torque actuator acting upon the driver's steering inputs and sensed lateral acceleration or, at high speeds, by a steer-by-wire system which may provide a more natural feel to the perceived lateral acceleration. The behavior during emergency situations was also studied.
The dynamic of narrow, automatically tilted commuter vehicles
Dynamik schmaler Pendlerfahrzeuge mit automatischer Neigung
1997
7 Seiten, 15 Bilder, 11 Quellen
Conference paper
English
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