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Hydraulically Controlled Adjustable Dampers
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English
Abstract
A system for remotely adjusting automotive dampers (shock absorbers) by means of modulated hydraulic pressure has been developed. This system can employ the road energy that would normally be dissipated by the dampers into heat, for powering the hydraulic control of damping. A generalized methodology for designing damping valving is developed and extended to hydraulic control. Limitations of the concept including force, response time and safety are covered. Experimental data of a unit with unidirectional flow of the damper fluid is presented.
Several levels of control are described from simple manually actuated pressure sources that control only damper valving to sophisticated ECU modulated systems with low pressure servo valves that have a system response that is flat to 200 Hz.
Authors
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Citation
Lemme, C. and Furrer, F., "Hydraulically Controlled Adjustable Dampers," SAE Technical Paper 900660, 1990, https://doi.org/10.4271/900660.Also In
References
- “Electronic Control of Car Chassis” Kizu R. Harada H. Minabe H. International Congress on Transportation Electronics, Proceedings Oct. 17-18 1988 IEEE Catalog 88CH2533-8
- “New Adjustable Ride Control System” Jobber Topics June 1989
- US Patent Number 4,838,394.
- “A Novel Valve for Semi-active Vehicle Suspension System” Parker G.A. Lau K.S. Proceedings of the Institution of Mechanical Engineers, Advanced Suspensions Oct 24-25 1988 London