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A dual-motor electric power steering system and a power steering method thereof

A technology of electric power steering and power steering, which is applied in electric steering mechanisms, automatic steering control components, steering gears, etc., can solve the problems of inability to meet the needs of commercial vehicles, and the output torque of the electric power steering system is too small, so as to improve fuel economy. Economy, increase output torque, reduce transportation cost effect

Inactive Publication Date: 2019-01-15
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a dual-motor electric power steering system and its power steering method to solve the problem that the output torque of the electric power steering system is too small to meet the needs of commercial vehicles. question

Method used

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  • A dual-motor electric power steering system and a power steering method thereof
  • A dual-motor electric power steering system and a power steering method thereof
  • A dual-motor electric power steering system and a power steering method thereof

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Embodiment Construction

[0034] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", "end", "side" etc. is based on the Orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicit...

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Abstract

The invention discloses a dual-motor electric power steering system and a power steering method thereof. In the system, a first steering shaft is connected under a steering wheel, and the first steering shaft is connected with a second steering shaft through a universal joint. A steering wheel torque and angle sensor is arranged below the steering wheel for detecting torque and steering wheel angle signals acting on the steering wheel. The main motor and the auxiliary motor are coaxial and connected through a coupling. The output end of the main motor is connected in parallel with the second steering shaft through a torque coupler. The output of the torque coupler is connected to the steering gear via a third steering shaft. According to the magnitude of the required auxiliary torque, themain motor and the auxiliary motor are controlled to always each bear half of the auxiliary current, and the torque is output at the same time, so as to meet the demand of the commercial vehicle for larger torque, improve the fuel economy of the commercial vehicle, and reduce the transportation cost, by setting two coaxial auxiliary motors connected through the coupling.

Description

technical field [0001] The invention belongs to the technical field of power steering systems, and in particular relates to a dual-motor electric power steering system and a power steering method thereof. Background technique [0002] The existing electric power steering system has high safety and reliability, and the steering characteristic curve is relatively ideal. At the same time, due to the use of a DC motor, the engine does not need to provide high-pressure oil, and the fuel economy of the whole vehicle is better. However, limited by the power supply voltage and installation size of the vehicle battery, the output torque of the electric power steering system is small, which cannot meet the steering assistance requirements of commercial vehicles. At present, the application field is still limited to passenger cars and light commercial vehicles. [0003] Therefore, from the perspective of fuel economy, the use of electric power steering system with large output torque ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/04B62D6/00B62D3/00B62D101/00
CPCB62D3/00B62D5/04B62D6/00
Inventor 李耀华何杰冯乾隆张洋森南友飞
Owner CHANGAN UNIV
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