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Steering device

A steering device and steering wheel technology, applied in steering mechanisms, mechanical steering mechanisms, electric steering mechanisms, etc., can solve problems such as inability to detect mechanism components or abnormal motor movements, and achieve the effect of improving reliability

Active Publication Date: 2020-03-10
HITACHI ASTEMO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since only the diagnosis of the controller is performed in such a static state, it is impossible to detect abnormalities in the operation of the structural components constituting the steering actuator of the steering device or the motor.

Method used

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Embodiment Construction

[0038] Hereinafter, embodiments of the present invention will be described in detail using the drawings, but the present invention is not limited to the following embodiments, and various modifications and application examples of the technical concept of the present invention are also included in the scope.

[0039] Before describing the embodiments of the present invention, the configurations of several power steering devices constituting the premise of the present invention will be described.

[0040] figure 1 , figure 2 Indicates a power steering device that detects the rotation angle, direction, and torque of the steering column separately from the drive of the steering shaft by the steering column that rotates the steering wheel, and rotates the motor based on these detection signals, and transmits the rotation of the motor to the nut to drive the steering shaft housed in the nut to assist the steering force.

[0041] The steering mechanism 1 is provided with: a steeri...

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Abstract

The present invention provides a steering device capable of detecting a driving abnormality of a motor or a driving abnormality of a mechanism member constituting a steering actuator of the steering device. A test drive command signal is output from a steering actuator drive command signal output unit (70), and an operation state signal relating to the operation of the steering actuator is detected by a steering actuator operation signal input unit (71). An abnormality diagnosis unit (72) determines the presence or absence of an abnormality in the steering device on the basis of the operationstate signal relating to the operation of the steering actuator with respect to the test drive command signal. Since the steering actuator is actually operated by the test command signal and abnormality diagnosis of the steering device is performed on the basis of the operation of the steering actuator, abnormality other than abnormality of a controller can be detected.

Description

technical field [0001] The present invention relates to a steering device mounted on an automobile, and more particularly to a steering device having an abnormality diagnosis function for detecting a failure or an abnormality of the steering device to diagnose whether there is an abnormal state. Background technique [0002] Among steering devices, there is known a so-called electronic power steering device that detects the turning angle, turning direction, and turning torque of the steering column separately from the driving of the steering shaft (steering shaft) by the steering column that rotates the steering wheel, and Based on these detection signals, the motor is rotated, and the rotation of the motor is transmitted to the nut to drive a steering shaft housed in the nut to assist steering force. Such an electronic power steering device is disclosed in, for example, Japanese Patent Laid-Open No. 2008-273263 (Patent Document 1). [0003] In addition, there is also known...

Claims

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Application Information

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IPC IPC(8): B62D5/04
CPCB62D5/0481B62D5/0457B62D5/04B62D15/021B62D6/002B60W2510/20B60W10/20B62D6/008B62D5/005
Inventor 后悠太中田光昭
Owner HITACHI ASTEMO LTD