Suspension Design: Double Wishbone
In part II we briefly analyze the first type of suspension: trailing arm. Now let’s take a look at the second major type: double wishbone suspension.
This type of suspension uses two “A” shape arms, one place on the top and the other in the bottom. Because each A arm can limit 2 degrees of freedom, so the two A arms together limits 4 out of the total 6 degrees of freedom. Therefore we still need one more restriction to make the whole system to be 1 degree of freedom.
For front wheels, the extra restriction is the steering arm; for rear wheels, car designers usually use a toe angle control arm.
In the below chart, the one labeled...
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