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US 2007/0176488 A1Published application
Power steering system
AssigneeHitachi, Ltd.
InventorsAyumu Miyajima, Toru Takahashi, Naoshi Yamaguchi, Makoto Yamakado, Masanori Ichinose, Takehiko Kowatari, Atsushi Yokoyama
Life of this patent
Estimating the term…
Abstract
In order to reduce a steering torque during stoppage of a vehicle, according to the invention, opposite drive torques in normal and reverse directions are applied to a left rear wheel and a right rear wheel when a driver steers a steering wheel in a state where the vehicle stops, whereby a moment to turn the vehicle is generated, and an assist torque for steering the steering wheel is generated.
Claims21
A power steering system, comprising:
- a steering actuator which applies a steering assist force to a front wheel which turns in accordance with a steering state by a driver;
- a steering state detecting means which detects the steering state by the driver;
- a rear wheel side actuator which applies drive torques to left and right rear wheels;
- and
- a rear wheel actuator control means which controls driving of the rear wheel side actuator so that opposite drive torques in normal and reverse directions are produced on the respective left and right rear wheels, or a drive torque is produced on one of the wheels while a braking force is produced on the other wheel, based on the steering state in a vehicle stopping state.
2 more elements
A power steering system, comprising:
- a steering actuator which applies a steering assist force to a front wheel which turns in accordance with a steering state by a driver;
- a steering state detecting means which detects the steering state by the driver;
- a rear wheel side actuator which applies drive torques to left and right rear wheels;
- and
- a rear wheel actuator control means which controls driving of the rear wheel side actuator so that different drive torques are produced on the respective left and right rear wheels based on the steering state in a vehicle stopping state, wherein
- a center of rotation of the drive torques applied to the left and right rear wheels is on an axis of the left and right rear wheels.
3 more elements
Dependencies are inferred from the claim text.