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$1 scrie:$2acPherson strut front suspension is pretty much the default in the compact segment these days, and so it is with the 2012 Ford Focus. The internal damping of the struts varies throughout the model range, but externally they look the same.
The front struts use the same housing but the internal valving is significantly different to produce more damping in cornering situations, which are dominated by the low internal piston speeds associated with body roll, not the high-speed staccato hammering of bumps. "More low speed damping" is therefore a phrase that applies to the rate at which the suspension strokes, not the vehicle's speed on the road.
$1 scrie:$2he trailing arm is tasked with fore-aft wheel location, so it doesn't need to be laterally stiff. In fact, a little sideways flexibility here is a good thing as the long primary lower link (white) and the shorter toe link (red) swing through vastly different arcs to create the desired amount of dynamic toe-in, sometimes referred to as roll understeer.
Meanwhile, our upper camber link (yellow) is characterized by an obvious curve that allows it to loop under the unibody and still maintain a favorable high-mount position at the pivot points.
The shock absorber's lower mount ties directly to the rear suspension upright for a 1-to-1 motion ratio, a move that allows for precise and efficient damping.
That damping varies in about three steps throughout the Focus lineup, and our Titanium with the handling package has the most aggressive of them all. But you can't tell from the outside, where they all look like black-painted shocks.
$1 scrie:$2lso, rack-mount EPS retains a bit of natural mechanical steering feel because the u-joints in the steering shaft and the rack and pinion enmeshment are directly connected to the steering wheel. Column EPS utterly filters out this mechanical feel because all of those components exist "behind" the assist curtain, making it easier for column EPS to feel video-gamey.
Of course tire self-aligning torque that's created through caster, dynamic cornering loads and the tire's own internal construction is still in danger of being masked by rack EPS, but the Focus team has done a good job of carefully tuning the EPS assist levels to allow the driver to get a good sense of it all. On top of that Ford's EPS system is programmed to auto-correct for crosswinds and extreme road crown so you don't have to crank in any steering to drive straight in such conditions.
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