Vehicle including a variable gear ratio steering device and an electric power steering apparatus
US6367577B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2001 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Mar 6, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/1958
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vehicle including a variable gear ratio steering device and an electric power steering apparatus is disclosed. The variable gear ratio steering device influences on a steering system of the vehicle and varies a ratio of a steering angle of steerable road wheels to a steering wheel angle by driving an electric motor in accordance with a vehicle speed. The electric power steering apparatus influences on the steering system of the vehicle and provides an assist steering wheel torque by driving an electric motor in accordance with a manual steering wheel torque. The vehicle comprises a power supply voltage detector for detecting a voltage of a power supply, and a control unit for controlling the electric motor of said variable gear ratio steering device in accordance with the detected voltage. When the detected voltage decreases to a certain voltage or lower, the control unit brings the variable gear ratio steering device into a slow state and thereafter stops the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.