초록 ▼

A seat of a vehicle is connected to the vehicle body by a support linkage that enables movement of the seat. A hydraulic actuator is connected between the seat and the vehicle body to produce motion which counteracts the influence of the vehicle body movement on the seat. An air bag, coupled between

A seat of a vehicle is connected to the vehicle body by a support linkage that enables movement of the seat. A hydraulic actuator is connected between the seat and the vehicle body to produce motion which counteracts the influence of the vehicle body movement on the seat. An air bag, coupled between the seat and vehicle body, has a variable spring preload to compensate for differing masses placed on the seat. A motion sensor detects movement of the seat and a displacement sensor detects seat displacement. A force sensor detects a force exerted on the actuator by an operator sitting in the seat. A controller responds to the motion and displacement sensors by operating the actuator to nullify effects of the movement of the vehicle body from acting on the seat, and responds to the force sensor by varying the spring preload of the air bag to maintain the force exerted on the actuator to within a defined range.

대표청구항 ▼

[ I claim:] [1.] An active suspension system for isolating a seat of a vehicle from motion disturbances of the vehicle body, said active suspension system comprising;a linkage by which the seat is attached to and supported by the vehicle body in a manner that enables movement of the seat along a giv

[ I claim:] [1.] An active suspension system for isolating a seat of a vehicle from motion disturbances of the vehicle body, said active suspension system comprising;a linkage by which the seat is attached to and supported by the vehicle body in a manner that enables movement of the seat along a given axis with respect to the vehicle body;an actuator connected between the seat and the vehicle body to produce motion of the seat which counteracts influence of the motion disturbances of the vehicle body;a spring connected between the seat and the vehicle body and having a preload which is variable to compensate for differing masses placed on the seat;a motion sensor detects movement of the seat along the given axis and produces a motion signal in response thereto;a force sensor which produces a force signal indicating a magnitude of force exerted on the actuator by the seat and an operator in the seat; anda controller which responds to the motion signal by operating the actuator to nullify effects of the motion disturbances of the vehicle body from acting on the seat, and which responds to the force signal by varying the preload of the spring to maintain the force within a predefined range.