Steering device
AssigneeToyota Jidosha Kabushiki Kaisha
InventorYasuaki Tsurumi
Life of this patent
Estimating the term…
Abstract
In a steering device, the transmission ratio variable mechanism changes a transmission ratio. The transmission ratio is a ratio of the turning angle of a wheel to the steering angle of a steering wheel. In the stationary-steering mode, the ECU sets a low transmission-ratio state where the transmission ratio is reduced compared with the transmission ratio in an ordinary mode when the steering wheel is increasingly steered while setting a zero-transmission-ratio state where coupling between the steering wheel and the wheel is released to set the transmission ratio to zero when the steering wheel is returned.
Claims3
A steering device, comprising:
- a steering wheel;
- and
- a transmission ratio variable mechanism configured to change a transmission ratio, the transmission ratio being a ratio of a turning angle of a vehicle wheel to a steering angle of the steering wheel, wherein
- in a case where (i) the steering wheel is steered at a vehicle speed less than a predetermined vehicle speed and (ii) the steering wheel is increasingly steered, the transmission ratio variable mechanism reduces the transmission ratio compared with a case of steering at a vehicle speed equal to or more than the predetermined vehicle speed, and
- in a case where (i) the steering wheel is steered at a vehicle speed less than the predetermined vehicle speed and (ii) the steering wheel is returned, the transmission ratio variable mechanism reduces the transmission ratio compared with the case where the steering wheel is increasingly steered at a vehicle speed less than the predetermined vehicle speed.
Dependencies are inferred from the claim text.