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Electric steering device

A technology of electric steering and steering assistance, applied in electric steering mechanism, power steering mechanism, steering mechanism, etc., can solve the problem that it is difficult for the driver to notice the wrong operation or failure, the steering operation is difficult, and the size becomes larger.

Active Publication Date: 2016-04-13
MITSUBISHI MOTORS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thereby, if the aforementioned erroneous operation, failure, etc. occur, the following phenomenon can be avoided: during the running of the vehicle, the steering wheel suddenly becomes heavy, that is, the force required for operating the steering wheel suddenly becomes large, and thus the steering operation becomes difficulty
[0007] However, the aforementioned prior art has a problem that it is difficult for the driver to notice the wrong operation or failure

Method used

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Examples

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Embodiment Construction

[0029] Hereinafter, an electric power steering device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0030] figure 1 is a block diagram showing the configuration of the electric power steering device 20 according to the embodiment.

[0031] The electric power steering device 20 according to this embodiment is installed in the vehicle 10 and is constituted by including a steering wheel 202 , a torque sensor 204 , an EPS (Electric Power Steering) control unit 206 and an electric actuator 208 .

[0032] The steering wheel 202 is provided at the driver's cab, and accepts steering operations, that is, operations of the driver's steering wheel.

[0033] The torque sensor 204 detects the amount of steering operation with respect to the steering wheel 202, and outputs the detected amount as a torque value.

[0034] The EPS control unit 206 is configured by including a CPU, a ROM for storing a control pro...

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PUM

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Abstract

An electric steering device includes an electric actuator (208) which generates a steering assist force for a steering mechanism (210) of a vehicle (10), a control unit which controls the steering assist force generated from the electric actuator (208) based on an operation of a steering wheel (202) by a driver, an ignition signal detection unit (2064) which detects presence or absence of an ignition signal of the vehicle (10), and a speed acquisition unit (2066) which acquires a running speed of the vehicle (10). In a case that the ignition signal is not detected and the running speed is a predetermined speed or more, the control unit reduces an upper limit of the steering assist force generated from the electric actuator (208) so as to be smaller than an upper limit in a case that the ignition signal is detected.

Description

technical field [0001] The present invention relates to an electric steering device for assisting a steering operation of a vehicle. Background technique [0002] There is known an electric steering apparatus that generates a steering assist force using an electric actuator for assisting a steering operation of a vehicle, that is, an operation of a steering wheel. [0003] As an electric power steering device driven by electricity, when a power supply system of a vehicle is turned off, the driving of the electric power steering device stops. When the driving of the electric power steering is stopped, the driver who performs the steering operation without the steering assist force is required to perform the steering operation with a larger force than usual. [0004] Patent Document 1 discloses a technology including a detection unit for detecting on / off of a power switch of a vehicle and a determination unit for determining whether the running speed of the vehicle is lower t...

Claims

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Application Information

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IPC IPC(8): B62D5/04
CPCB62D5/0481B62D5/0463
Inventor 山中裕基桥口雅幸
Owner MITSUBISHI MOTORS CORP
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