초록 ▼

A vehicle leveling strut of the type having a direct-acting hydraulic shock absorber provided with a reciprocable piston rod having a dirt shield mounted thereon. A tubular rolling diaphragm member secured at one end to the shock absorber and to the opposite end to the dirt shield and defining there

A vehicle leveling strut of the type having a direct-acting hydraulic shock absorber provided with a reciprocable piston rod having a dirt shield mounted thereon. A tubular rolling diaphragm member secured at one end to the shock absorber and to the opposite end to the dirt shield and defining therewith a variable volume chamber adapted to be selectively pressurized and de-pressurized for controlling the distance between the sprung and unsprung portions of an associated vehicle. Located interiorly of the pressurizable chamber and concentrically positioned between the shock absorber and fixedly mounted to the dirt shield is a generally tubular support member upon which is mounted at least one pair of electrical coil windings for sensing changes in the electromagnetic field of each coil winding. Associated with the shock absorber axially moving through the tubular support member are means for changing the electromagnetic fields of the coil windings so as to provide a control signal which effects actuation of a pressurized fluid supply source.

대표청구항 ▼

A vehicle leveling strut connectable to a source of pressurized fluid for changing the attitude of said vehicle, said leveling strut comprising: a damper having a piston and rod assembly reciprocably confined within a first cylinder with a first end of said piston rod extending axially from one end

A vehicle leveling strut connectable to a source of pressurized fluid for changing the attitude of said vehicle, said leveling strut comprising: a damper having a piston and rod assembly reciprocably confined within a first cylinder with a first end of said piston rod extending axially from one end of said first cylinder; a second cylinder concentric with and radially outward from said first cylinder, said second cylinder secured to said first end of said piston rod for reciprocable movement therewith; chamber means for providing a fluid-tight pressurizable chamber between said first and second cylinders; displacement sensing means for sensing the relative axial displacement between said first and second cylinders, said displacement sensing means disposed between said first and second cylinder and capable of reciprocable movement with said second cylinder, said displacement sensing means including first and second coil means for generating first and second electromagnetic fields, respectively; field changing means for changing one of said first and second electromagnetic fields in response to axial displacement of said first cylinder relative thereto, said field changing means operably associated with said first cylinder; and a control circuit for sensing changes in one of said first and second electromagnetic fields and energizing said pressurized fluid source in response thereto, said first and second coil means defining three discrete axial displacement positions of said first cylinder relative to said second cylinder such that the axial position of said field changing means relative to said first and second electromagnetic fields generates an electrical control signal for energization of said pressurized fluid source to selectively charge the attitude of said vehicle.