The hydro-pneumatic suspension.

This system represents a new generation in suspension design, replacing as it does the coil springs and shock absorbers found on conventional cars. The hydro-pneumatic suspension provides driver and passengers with a level of comfort that must be experienced to be fully appreciated. And in the area of handling, it gives the 6.9 a precision and sure footedness usually associated with the finest sports cars rather than full size sedans. In addition, its unique self-levelling feature maintains vehicle height under any normal load. Thus, headlight aim and bumper height remain unchanged whether the vehicle is occupied by a single person or its full complement of five.

Hydro-pneumatic suspension.
The incredibly stable road feel of the 6.9, even when negotiating sharp curves, and the extremely comfortable ride are due in large part to the vehicle's innovative hydro-pneuniatic suspension.

Four suspension units (1) serve the dual function of carrying the vehicle load and acting as shock absorbers. These units consist of a hydro-pneumatic pressure reservoir (1a) and a hydraulic strut (lb).

Pressure for the system is supplied by the hydraulic oil pump (2) and is accumulated by the main pressure reservoir (3). An oil reservoir (4) serves as the central storage tank for the systern. Two leveling valves, one in the front and one in the rear, maintain a constant vehicle height under normal load. A dash-mounted control knob is used to block the system when jacking or servicing the car.

Rear axle.
The semi-trailing arms used on the rear axle are constructed of light alloy to minimize the unsprung weight of the vehicle and enhance handling charac teristics. To counter the normal tendency of any automobile to dip during acceleration and lift during braking, two special torque linkages (5) have been incorporated. Road-holding characteristics are further improved through the use of a limited slip differential.

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