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Vehicle steering control device

A technology of steering control and power steering device, which is applied to automatic steering control components, vehicle components, steering mechanisms, etc., and can solve problems such as high cost, reduced vehicle mountability, and high voltage power supply.

Inactive Publication Date: 2010-10-20
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, a large-scale power steering device is required, and a high-voltage and large-capacity power supply is also required
Therefore, the size and cost of the steering control device cannot be avoided, and the vehicle mountability of the steering control device will decrease.

Method used

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Examples

Experimental program
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Effect test

no. 1 example

[0100] figure 1 It is a schematic configuration diagram showing the first embodiment of the vehicle steering control device in the present invention.

[0101] exist figure 1 10 generally represents a steering control device of a vehicle 12 , and the steering control device 10 includes a rack and pinion type electric power steering device 14 and a variable steering ratio (VGRS) device 16 . The power steering device 14 and the steering ratio variable device 16 are controlled by an electric power steering (EPS) control device 18 and a steering ratio control device 20 , respectively.

[0102] In addition, although figure 1 Not shown in detail, but the electric power steering control device 18 and the steering ratio control device 20 respectively have a CPU, ROM, RAM, and input / output port devices, and they may also include a microcomputer and a drive circuit interconnected by a bidirectional common bus. In addition, the electric power steering control device 18 and the steering...

no. 2 example

[0146] Figure 9 It is a functional block diagram showing an angle change limit value calculation unit in a second embodiment of the steering control device for a vehicle according to the present invention configured as a modified example of the first embodiment. In addition, based on the second embodiment of Figure 9 The control other than the control of the functional block diagram is performed in the same manner as in the case of the first embodiment described above.

[0147] In this second embodiment, the angle change limit value calculation section 76 has a basic angle change limit value calculation block 118 including a map 117 corresponding to the map 116 of the first embodiment. A basic angle change limit value calculation block 118 calculates a base angle change limit value Δθplimb from the map 117 based on the rotation speed margin Mpd. In addition, the angle change limit value calculation unit 76 has a correction coefficient calculation block 121 including a map ...

no. 3 example

[0158] Figure 11 It is a functional block diagram showing an angle change limit value calculation unit in a third embodiment of the steering control device for a vehicle according to the present invention configured as a modified example of the first embodiment. In addition, based on the third embodiment Figure 11 The control other than the control of the functional block diagram is performed in the same manner as in the case of the first embodiment described above.

[0159] In this third embodiment, the angle change limit value calculation section 76 has the same basic angle change limit value calculation block 118 as in the case of the second embodiment. A basic angle change limit value calculation block 118 calculates a base angle change limit value Δθplimb from the map 117 based on the rotation speed margin Mpd. In addition, the angle change limit value calculation unit 76 has a correction coefficient setting unit 128, and the correction coefficient setting unit 128 fo...

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PUM

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Abstract

The invention aims to reduce the possibility of a power assistance failure because of the phenomenon that steering assisting power producible by an electric power steering device is lower than the steering assisting power required for the electric power steering device. A power steering control device comprises an electric power steering device, a steering ratio varying device for varying the steering ratio by driving an output member relatively to an input member driven by the steering operation by the driver, and a control device for controlling the steering ratio varying device. When the difference between the maximum value of the steering drive speed range of the steering wheel for which a required steering assisting power producible by the power steering device and an actual steeringdrive speed of the steering wheel is small, the control device decreases the relative drive speed of the output member with respect to the input member by the steering ratio varying device in contrast to the large difference.

Description

technical field [0001] The present invention relates to a steering control device for a vehicle, and more specifically, to a steering control device for a vehicle including an electric power steering device that generates steering assist force and a steering ratio variable device that changes the steering ratio of the steering wheels The steering angle changes the ratio of the amount of motion relative to the amount of steering manipulation by the driver. Background technique [0002] As one of steering control devices for vehicles such as automobiles, the following steering control devices are known. The steering control device includes: an electric power steering device that generates steering assist force for steering the steering wheels; The variable device changes the steering ratio by driving the output member relatively to the input member driven by the driver's steering operation. [0003] In addition, for example, as described in Japanese Patent Application Laid-Op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D6/00B62D5/04B62D101/00B62D113/00B62D119/00
CPCB62D5/008B62D5/0481B62D6/002
Inventor 小城隆博提拉瓦·林皮汶特恩格
Owner TOYOTA JIDOSHA KK
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