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Electric power steering system

An electric power steering and steering system technology, which is applied to electric steering mechanisms, automatic steering control components, steering mechanisms, etc., can solve problems such as deterioration of steering feel, poor steering wheel return, and uneven steering feel, and achieve the goal of improving steering feel Effect

Inactive Publication Date: 2004-06-16
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, according to the conventional forward / reverse determination process, there arises a problem that the steering feel is remarkably deteriorated as expressed by "poor steering wheel return" or "unsmooth steering feel"

Method used

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Examples

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Embodiment Construction

[0045] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0046] figure 1 is a diagram showing a typical configuration of an electric power steering system according to an embodiment of the present invention. In the electric power steering system 10, the manual steering torque generating mechanism 16 is formed by connecting the gear 15a of the rack-and-pinion transmission mechanism 15 with the steering shaft 12 integrally provided on the steering wheel 11 via the connecting shaft 13 having universal joints 13a, 13b. formed by connection.

[0047] The rack shaft 17 has rack teeth 17a meshed with the gear 15a, and when the rotational motion of the steering wheel is converted into reciprocating motion by the meshing of the gear 15a with the rack teeth 17a, the rack shaft 17 reciprocates, and the rack shaft 17 Its two ends are connected with the left and right front wheels 19 as turning wheels by steering tie ro...

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Abstract

The electric power steering device 10 is equipped with a determination part 60 to determine a state of going or returning. The determination part 60 to determine the state of going or returning determines the state of the steering wheel as a returning state, and thereafter the returning state is continued until an absolute value of a rotation speed of the motor to be detected by a detection part of the rotation speed of the motor reaches not more than a predetermined value BB.

Description

technical field [0001] The present invention relates to an electric power steering system, and more particularly, to an electric power steering system for reducing a driver's manipulation work by directly applying a rotational force of an electric motor to a steering system. Background technique [0002] The electric power steering system is a system that has an electric motor provided on a steering system in order to relieve a driver from steering work by controlling power supplied from the electric motor using a control unit. [0003] In a general electric power steering system, assist torque relative to steering torque input to a steering wheel by a driver is generated by conducting assist current to an electric motor. The auxiliary current is determined by mainly performing the following three processes according to the input signals of the steering torque, vehicle speed, and motor speed, namely: basic current calculation processing, and inertia compensation for calculat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D6/00B62D5/04B62D101/00B62D119/00
Inventor 鲤渕宏之伊藤淳広中慎司
Owner HONDA MOTOR CO LTD
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