In automobiles, a
double wishbone (or
upper and lower A-arm)
suspension is an
independent suspension design using two (occasionally parallel)
wishbone-shaped arms to locate the wheel. Each wishbone or arm has two mounting points to the
chassis and one joint at the knuckle. 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 and more.
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