Vehicle seat adjustment device with programmed relationships

Claim 1

An adjustment device for a vehicle seat comprising: a plurality of mechanisms for adjusting respective seat position parameters of the seat; a corresponding plurality of reversible electric motors associated with respective ones of said plurality of mechanisms, each said reversible electric motor having a motor speed which is variable as a function of an excitation value; a corresponding plurality of detecting means for detecting position values of each seat position parameter at each instant and for representing each detected position value as a corresponding electrical magnitude; a memory means for storing preprogrammed relationships interrelating the seat position parameters and variations thereof, the preprogrammed relationships being determined as a function of ergonomic standards related to a human body; a computation means connected to said memory means and to said detecting means for sensing variations of the position values of each seat position parameter at each instant and for generating, on the basis of the preprogrammed relationships, corresponding instructions for excitation values at each instant for the motors associated with the other seat position parameters; and a control means for controlling actuation of each one of said motors, said control means (a) including an actuator for changing each seat position parameter which is easily actuated by a user sitting on the seat, (b) being connected to said computation means, and (c) dynamically controlling the continuous actuation of said motors in response to an actuation of said actuator by continuously generating variable excitation values simultaneously for all of said plurality of motors in response to the instructions at each instant from said computation means.