Patent ID: 11919352
Assignee: FORD GLOBAL TECHNOLOGIES, LLC
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 19:
20. A position sensitive suspension system for a vehicle, the system comprising:
a plurality of ride height sensors at locations of a chassis of the vehicle corresponding to respective wheels of the vehicle; and
a plurality of active position sensitive dampers, each active position sensitive damper being associated with one of the respective wheels of the vehicle,
wherein each of the active position sensitive dampers is tuned to avoid pitch resonance in accordance with a method comprising:
determining, by a processor/controller, pitch characteristics of a vehicle for a terrain profile and speed range via a model associated with the vehicle;
decoupling front and rear axles by removing pitch inertia from the model;
determining, by a processor/controller, optimized damping for a main damper of a position sensitive damper over a linear range of wheel travel in a bounce control zone based on the pitch characteristics;
recoupling the front and rear axles by adding the pitch inertia back into the model;
selecting a secondary damper associated with a compression zone or a secondary damper associated with a rebound zone as a selected damper for adjustment based on which of the front and rear axles is limiting;
performing a damping adjustment to the selected damper; and
cyclically repeating selecting the secondary damper and performing the damping adjustment until pitch resonance is suppressed.