Vehicle dynamics of small cars with reduced fuel consumption - possibilities and limits of optimizing driving comfort and handling characteristics

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Vehicle dynamics of small cars with reduced fuel consumption - possibilities and limits of optimizing driving comfort and handling characteristics

Haken, K.L. / Maulik, T.

Future light vehicles with a low fuel consumption differ from current small and medium-size vehicles by a significantly higher possible payload related to the vehicle weight. To achieve a good ride in the unladen and in the laden state efforts an especially spring design for light vehicles, otherwise extrem large spring travels have to be provided. Thereby a number of difficulties in the preparation of an optimum overall vehicle concept are caused. Therefore different suspension designs with progressiv spring rate and/or level control were compared by means of vehicle dynamics simulations. Good results in aspect to high ride and driving behaviour can be reached with adapted spring and damping rates to the load. The best results can be reached with linear supporting springs combined with load adapted damping rates and additional low preloaded spring and an anti-roll bar, the rates of both adaptable to the load. By use of a simple mechanic adjusting device, all parameters can be adapted to the load without energy from the vehicle. The vehicle level is not completely independent of the load in this solution but can be designed so that the suspension bump movement travels on the front and rear axle are matched over the entire load range so that the aerodynamics are not impaired. Some considerations to the driving resistance show, that by suspension design further reductions of the driving resistance seem to be possible without impairing vehicle dynamics.

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Title :

Vehicle dynamics of small cars with reduced fuel consumption - possibilities and limits of optimizing driving comfort and handling characteristics

Additional title:

Fahrzeugdynamik von Kleinwagen mit verringertem Kraftstoffverbrauch - Möglichkeiten und Grenzen eines optimierten Fahrkomforts und Bedienungskenndaten

Contributors:

Haken, K.L. (author) / Maulik, T. (author)

Published in:

Conference 1: Vehicle dynamics, European Congress, Lightweight and Small Cars, the Answer to Future Needs, 6 ; 1 ; 1-11

Publication date :

1997

Size :

11 Seiten, 7 Bilder, 3 Quellen

Type of media :

Conference paper

Type of material :

Language :