Dual pivot steering geometry
Dual-pivot steering geometry (also known as virtual pivot) is a geometric arrangement of linkages in the steering of a car designed to reduce or eliminate scrub radius by moving the pivot point of the king pin outboard, in order to improve steering precision and straight line stability.[1]
It is typically used with a MacPherson strut, but can also be applied to a double wishbone suspension.[2] In either case, the difference is that the single bottom wishbone is replaced by a pair of suspension links forming a trapezoidal four-bar linkage. This allows the kingpin to pivot about a pivot point nearer the center of the wheel's contact patch instead of the traditional pivot point at the ball joint of the bottom wishbone.
Examples[edit]
- Hyundai Genesis Coupe[1]
- BMW 750i[2]
- BMW 3 Series[1]
- Pontiac G8[3]
- Ford Territory[4]
- Ford Falcon[5]
- Tesla Model S[6]
See also[edit]
- Scrub radius
- MacPherson strut
- Double wishbone suspension
- King pin
- Steering
- Four-bar linkage
- Ackermann steering geometry
- Control arm
- Radius rod
References[edit]
- ^ a b c 2009 Hyundai Genesis Coupe: Suspension Walkaround by Dan Edmunds, 2009, Edmunds.com. Accessed October 2014.
- ^ a b 2009 BMW 750i: Suspension Walkaround by Dan Edmunds, 2009, Edmunds.com. Accessed October 2014.
- ^ Dan Edmunds (2009). Pontiac G8 GT dual-pivot front suspension demonstrated.
- ^ Ford Territory: New suspension revealed by Marton Pettendy, 2003, GoAuto.com.au. Accessed October 2014.
- ^ Ford Falcon & G Series MkII Driving Dynamics Ford.com, Accessed October 2014
- ^ 2012 Tesla Model S Signature Performance Suspension Walkaround by Dan Edmunds, 2012, Edmunds.com. Accessed October 2014.