Self aligning torque

Self aligning torque

Self aligning torque, also known as the aligning torque, SAT or Mz, is the torque that a tire creates as it rolls along that tends to steer it, ie rotate it around its vertical axis. Even if the slip angle and camber are zero, and the road is flat, this torque may still be generated due to assymetries in the tire's construction. Typically for a producion tire this torque reaches a maximum at 2-4 degrees of slip (this figure is very dependent on a lot of things) and falls to zero as the tire reaches its maximum lateral force capability.


Milliken and Milliken "Race Car Vehicle Dynamics" Chapter 2

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • self-aligning torque — A torque which is created by the tire when the vehicle corners. The force created at the tire patch acts toward the rear of the actual center of the wheel. This action is called pneumatic trail. It has the same effect as positive caster and can… …   Dictionary of automotive terms

  • torque — [1] Turning or twisting force such as the force imparted on the drive line by the engine. Usually measured in lb ft. It differs from work or power in that torque does not necessarily produce motion. Basically, the magnitude of a torque acting on… …   Dictionary of automotive terms

  • Bicycle and motorcycle dynamics — A computer generated, simplified model of bike and rider demonstrating an uncontrolled right turn. An …   Wikipedia

  • axis — The centerline, whether real or imaginary, around which a thing rotates. Also see cam ground piston eccentric bolt hotchkiss drive kingpin axis kingpin inclination moment of inertia pivot axis roll axis self al …   Dictionary of automotive terms

  • RFactor — Infobox VG| title = rFactor developer = Image Space Incorporated publisher = Self published by Image Space Incorporated designer = Image Space Incorporated engine = gMotor2 released = release date and age|2005|8|31 latest release version = v1255… …   Wikipedia

  • Hans B. Pacejka — Prof. Dr. Dr. Ir. Hans Bastiaan Pacejka is a well known expert in vehicle system dynamics and particularly in tire dynamics, fields in which his influential works are now standard references. He is Professor emeritus at Delft University of… …   Wikipedia

  • Understeer and oversteer — Understeer: the car does not turn enough and leaves the road. Oversteer: the car makes the tu …   Wikipedia

  • pneumatic trail — The distance between a vertical line through the center of the wheel and the center of pressure of the tire contact patch; most apparent during cornering. See self aligning torque …   Dictionary of automotive terms

  • Nut (hardware) — A nut threaded onto a bolt A nut is a type of hardware fastener with a threaded hole. Nuts are almost always used opposite a mating bolt to fasten a stack of parts together. The two partners are kept together by a combination of their threads… …   Wikipedia

  • Magnetic moment — Electromagnetism Electricity · …   Wikipedia