Patent ID: 7743873

Claim:
A variable rack stroke system for vehicle, comprising: a housing; a rack bar slidably disposed in the housing; a motor; a rotary member, a rotational position of which is adjusted by the motor, comprising a groove on an inner periphery thereof and at least two first protrusions protruding from the rotary member in an axial direction apart from each other, wherein the at least two first protrusions comprise a first relatively thicker protrusion and a first relatively thinner protrusion; a stationary member coupled with a ball joint coupled with the rack bar, comprising protruding parts on an outer periphery thereof and selectively inserted into the groove, and at least two second protrusions protruding from the stationary member opposite the axial direction of the at least two first protrusions to abut with the at least two first protrusions when aligned therewith, wherein the at least two second protrusions comprise a second relatively thicker protrusion and a second relatively thinner protrusion; and a switch to adjust a rotational phase of the motor.