Patent ID: 7793755
Filing Date: 2010-09-14
Classification: B62D

Abstract:
1. A steering system for use in a vehicle having a steering wheel and a tire wheel, the steering system comprising: a first motor that is configured to generate a first torque for use in varying a transmission ratio between a steering wheel angle of the steering wheel and a steering tire angle of the tire wheel; a first speed reducer mechanism that is configured to increase the first torque of the first motor and output the first torque so that the transmission ratio is variable; a first rotation angle sensor that is configured to detect a first rotation angle of the first motor; a second motor that is configured to generate a second torque for use in assisting in steering the tire wheel; a second speed reducer mechanism that is configured to increase the second torque of the second motor and output the second torque so that the steering of the tire wheel is assisted; a second rotation angle sensor that is configured to detect a second rotation angle of the second motor; a steering wheel angle sensor that is configured to detect a value of a steering wheel angle of the steering wheel; and a steering wheel angle computation processing unit that is integrated with the steering wheel angle sensor, wherein the steering wheel angle computation processing unit includes: