Automatic steering system for vehicle
First Claim
1. An automatic steering system for a vehicle, comprisinga movement locus setting means for setting a locus of movement of the vehicle to a target position, an actuator for steering at least one wheel of the vehicle, and a control means for controlling the driving of said actuator based on the locus of movement set by said movement locus setting means, and a steering operation detecting means for detecting the steering operation by a driver, wherein when said steering operation detecting means detects a steering operation for at least a predetermined time, said steering operation detecting means determines that the steering operation is by the driver and said control means discontinues the control of said actuator based on said locus of movement.
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Accused Products
Abstract
An automatic steering system that can detect the steering operations of a driver during an automatic steering control operation in order to reliably discontinue the automatic steering control operation. The automatic steering control operation is discontinued if the driver spontaneously carries out a steering operation during an automatic steering control operation and if a steering torque equals to or is larger than a reference steering torque. When the steering torque equals to or is larger than the reference steering torque for at least a predetermined time, the automatic steering control operation is discontinued. Interruptions to the automatic operation by an instantaneous increase in steering torque due to a factor other than the steering operation provided by the driver, such as noise, can be eliminated. Furthermore, the reference steering torque or the predetermined time is changed in accordance with the frequency of an input steering torque, the vehicle speed, the steering angular speed, or the steering angular acceleration or the locus of movement of the vehicle.
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Citations
17 Claims
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1. An automatic steering system for a vehicle, comprising
a movement locus setting means for setting a locus of movement of the vehicle to a target position, an actuator for steering at least one wheel of the vehicle, and a control means for controlling the driving of said actuator based on the locus of movement set by said movement locus setting means, and a steering operation detecting means for detecting the steering operation by a driver, wherein when said steering operation detecting means detects a steering operation for at least a predetermined time, said steering operation detecting means determines that the steering operation is by the driver and said control means discontinues the control of said actuator based on said locus of movement.
Specification