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A Shock Absorber Design with Position Sensitive Damper and its Performance Evaluation
Technical Paper
2015-32-0785
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Ride comfort and handling present conflicting requirements on damping properties of a suspension system. While ride comfort demands a softer damping, a higher damping force makes the ride handling better. Conventional dampers, being solely velocity dependent, are always a compromise between these two requirements. A damper can be made position sensitive, in addition to its velocity dependence, in order to obtain the best of both the worlds. A position-sensitive damper can have a softer damping force for low amplitude road excitations, as observed on highways and a higher damping force for higher amplitude road excitations, as observed in off-road conditions. Thus such a damper can be optimized not only for a good comfort, but for a good handling performance also. General designs for a position sensitive damper involve a bypass arrangement around the piston. This paper discusses an alternate arrangement for achieving position sensitive damping and its benefits. Prototypes of the same have been made and tested on a servo-hydraulic damper performance testing machine. Extensive analysis has been done to validate the position dependency. Further the prototypes have been tested on a vehicle. The findings are concluded in terms of an objective comparison between position sensitive damper and conventional damper.
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Citation
Kokane, G., Ahamed, N., and Kharul, R., "A Shock Absorber Design with Position Sensitive Damper and its Performance Evaluation," SAE Technical Paper 2015-32-0785, 2015, https://doi.org/10.4271/2015-32-0785.Also In
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