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Most control arms form the lower link of a suspension. Control arms play a crucial role in the suspension system of a vehicle. They help to keep the wheels aligned and maintain proper tire contact with the road, which is essential for safety and stability. [1] The inboard (chassis) end of a control arm is attached by a single pivot, usually a ...
The Mercedes-Benz S-Class Active Body Control system eliminates the anti-roll bar, instead using sensors to detect lateral load, lateral force, and height difference in the suspension strut, which then hydraulically raise or lower the spring to counter roll.
A simple kingpin suspension requires that the upper and lower control arms (wishbones) have pivot axes that are parallel, and in strict geometric relationship to the kingpin, or the top and bottom trunnions, which connect the kingpin to the control arms, would be severely stressed and the bearings would suffer severe wear.
The lowered pivot point and longer arm length reduce the change in camber and the effect is far less hazardous than powered swing axles for the rear wheels listed above, where the pivot point is approximately on the same side frame rail. [6] The Twin I-Beam suspension includes an additional radius arm link on each side to control caster. [7]
The shock absorber and coil spring mount to the wishbones to control vertical movement. Double wishbone designs allow the engineer to carefully control the motion of the wheel throughout suspension travel, controlling such parameters as camber angle, caster angle, toe pattern, roll center height, scrub radius, scuff (mechanical abrasion), and more.
Active Body Control, or ABC, is the Mercedes-Benz brand name used to describe electronically controlled hydropneumatic suspension. [ 1 ] [ 2 ] This suspension improves ride quality and allows for control of the vehicle body motions, allowing for reduced body roll in many driving situations including cornering , accelerating , and braking .