SELF-LEVELLING STRUT: Describes a suspension strut design that incorporates a shock absorber with a rubber boot filled with compressed air, serving as an auxiliary pneumatic spring,
SEMI-ACTIVE SUSPENSION: Describes a suspension system characterised by its ability to be fine-tuned to driving conditions by hydraulic adjustment of spring supports coupled with electronic correction of the damping rate.
SEMI-INDEPENDENT SUSPENSION: Describes a rear axle design with a torsionally flexible cross member, with the wheels being located on trailing links
SEMI-TRAILING ARM: Describes a style of independent rear suspension where the pivot axes sit at around 25 degrees to a line running straight across the car.
SEMI-TRAILING LINK: Describes the arm of a coil spring in an independent rear suspension system that pivots at an angle to the vehicle's centreline, imparting negative camber with an increase in load.
SLIDING-PILLAR SUSPENSION: Describes a traditional front suspension layout (used in pre-war Morgan cars), where the carrier-mounted stub axle slides up and down a vertical pillar while enclosed coil springs providing the suspension.
SPRUNG WEIGHT: Describes a rate of measure in which its suspension system fully supports the weight of all parts of a vehicle.
STRUT: Describes an individual, self-contained pivoting suspension unit used on front-wheel drive vehicles integrating a coil spring with a shock absorber.
SUSPENSION: Describes the assembly of springs, shock absorbers, torsion bars, joints, arms and other auxiliary parts that combine to cushion the shock of road bumps while keeping a vehicle's wheels in constant contact with the road, improving both control and traction.
SUSPENSION LINK: Describes any arm that links the chassis to the axle.
SUSPENSION MOUNTING: Describes the assembly of sheet metal parts, bores fitted on a vehicle underbody to house the axles and springs.
SUSPENSION STRUT: Describes an assembly of spring and damper elements, either a damper strut or a MacPherson strut.
SUSPENSION SUBFRAME: Describes the suspension layout, designed to absorb noise and vibration, where all the suspension elements are mounted on an insulated, detachable suspension subframe
SUSPENSION TURRET WEB: Describes a form of auxiliary support for the MacPherson strut that is situated at the lower side of the strut tower panel, allowing the strut to rest against the top strut mounting from below
SWAY BAR: Describes a round bar that connects the left wheel suspension assembly with the right side found at the front and rear of the vehicle frame, whose primary function is to keep both wheels rolling at the same rate when meeting an uneven road surface.
SWING AXLE: Describes a form of independent rear suspension system in which each driving wheel can move up or down independently of the other. When cornering, cars fitted with swing axles are more prone to wheel jacking, a situation that can lead to sizeable positive camber at the outside rear wheel and sudden oversteer.
THREE-LINK SUSPENSION: Describes a variation on the traditional four-link suspension where the upper link has been removed. Generally found in budget range models
TORSION BAR SUSPENSION: Describes a suspension system that uses torsion bars instead of leaf or coil spring.
TRAILING ARM: Describes an independent rear suspension system, widely in front-wheel-drive cars, in which the pivot axis is positioned precisely across the width of the vehicle, perpendicular to the longitudinal axis meaning that the wheels are always upright relative to the body.
TRAILING LINK: Describes a form of front suspension linkage aligned to resist longitudinal motions in a wheel and mounted to the chassis ahead of the wheel.
TRANSVERSE ARM: Describe a one-piece design of suspension arm that is often used as a bottom locating link in a MacPherson strut suspension system.
TRANSVERSE LINK: Describes a type of suspension link of the Y-shaped wishbone design that provides lateral support for wheels.
WISHBONE ARM: Describes a type of suspension linkage found commonly on the front suspension formed either in the shape of an "A" or "V". The sides of the two legs of the A-arm are connected to the chassis by rubber bushings. At the same time, the peak of the A-arm is attached to the wheel assembly, allowing the wheel to move freely up and down.
UNEQUAL-LENGTH WISHBONE SUSPENSION: Describes a dual wishbone suspension system where the upper wishbone is shorter than the lower, although both converge at the wheel hub.
WATTS LINK: Describes a device used to control side to side motion in a 4-link rear suspension. The watts link has a pivot point in the centre of the axle and a rod that runs to each side of the car.
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