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Electric vehicle steering mechanism

A technology of steering system and electric motor, applied in the field of steering system

Active Publication Date: 2013-05-01
SUZUKI MOTOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In an electric vehicle without an engine or a series hybrid vehicle in which the engine speed is not directly related to the vehicle speed, it is necessary to develop a unique power steering that does not use the engine speed signal, so these types of vehicles have problems in terms of development manpower and cost

Method used

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Embodiment approach

[0026] figure 1 and figure 2 Embodiments of the present invention are shown.

[0027] exist figure 1 In , reference numeral 1 denotes a motor-driven vehicle.

[0028] This motor-driven vehicle 1 includes: a driving motor 2 which is a power source of the motor-driven vehicle 1; a motor speed sensor 3 for detecting the speed of the driving motor 2; a steering system 6 for steering according to a steering wheel 4 to provide the steering angle to the front wheels (also referred to as "drive wheels"); the vehicle speed sensor 7, which is used to detect the speed of the motor-driven vehicle 1; and the power steering controller 8, which is based on the motor speed sensor 3 At least one of the output signals of the vehicle speed sensor 7 outputs an assist amount according to the steering operation of the occupant.

[0029] In addition, if figure 1 As shown in , a motor-driven vehicle 1 has front wheels 5 and rear wheels 9 with a drive battery 10 installed between the rear whe...

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Abstract

An object of the present invention is to provide a steering system for a motor-driven vehicle, which has steering operability equivalent to that of a vehicle mounted with a conventional internal combustion engine only, and has steering operability equivalent to an inherent one even during the time when fail-safe control of assist of steering force is carried out. To achieve this object, in the steering system for a motor-driven vehicle including a drive motor that is a power source for the motor-driven vehicle, a motor speed sensor for detecting the speed of the drive motor, a steering system for giving a steering angle to front wheels according to the steering angle of a steering wheel, a vehicle speed sensor for detecting the speed of the motor-driven vehicle, and a power steering controller that outputs an assist amount according to the steering of a passenger based on at least one of the output signals of the motor speed sensor and the vehicle speed sensor, as the speed of the motor-driven vehicle or the speed of the drive motor increases, the assist amount is made smaller.

Description

technical field [0001] The present invention relates to a steering system of a motor-driven vehicle, and more particularly, to a technique of applying a power steering system for a vehicle mounted with a conventional internal combustion engine to a motor-driven vehicle mounted with a drive motor using electric power as a driving source. Background technique [0002] In the power steering system of a conventional engine-driven vehicle, the assist amount is controlled by the vehicle speed signal transmitted from the wheel speed and the engine speed signal (used to judge the drivability of the vehicle). In an electric vehicle without an engine or a series hybrid vehicle in which the engine speed is not directly related to the vehicle speed, it is necessary to develop a unique power steering that does not use an engine speed signal, so these types of vehicles have problems in development manpower and cost. As a method of applying the power steering system of an engine-driven veh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D6/00B60L15/20
CPCB62D5/0463B62D6/02B62D6/001B60L15/2036B60L2240/12Y02T10/642B60L2240/421B62D5/0484Y02T10/64Y02T10/72
Inventor 井泽和幸
Owner SUZUKI MOTOR CORP
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