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Double-motor electric power-assisted steering system and power-assisted steering method thereof

An electric power steering, dual motor technology, applied in the direction of electric power steering mechanism, etc., can solve the problem that the output torque of electric power steering is too small and cannot meet the application, so as to improve the output torque, improve fuel economy, and prevent major accidents. Effect

Inactive Publication Date: 2015-06-17
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a dual-motor electric power steering system and its power steering method to solve the problem that the electric power steering output torque is too small to meet the application on commercial vehicles

Method used

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  • Double-motor electric power-assisted steering system and power-assisted steering method thereof
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  • Double-motor electric power-assisted steering system and power-assisted steering method thereof

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Embodiment Construction

[0026] See figure 1 As shown, a dual-motor electric power steering system of the present invention includes: a steering wheel 1, a steering wheel torque angle sensor 2, a control unit 3, a second steering shaft 4, a torque coupler 5, a steering gear 6, and a first steering shaft 7. Main booster motor 8, auxiliary booster motor 9, one-way clutch assembly 10, reducer 11, overload protector 12, and normally closed electromagnetic clutch 13.

[0027] The first steering shaft 7 is connected below the steering wheel 1, and the first steering shaft 7 is connected to the second steering shaft 4 through a universal joint (the number of steering shafts can be selected according to the specific arrangement relationship, here two steering shafts are taken as an example); The steering wheel torque angle sensor 2 is set under the steering wheel 1, and is used to collect the torque and angle signals of the steering wheel 1 in real time; the main booster motor 8 and the auxiliary booster motor 9 ...

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Abstract

The invention discloses a double-motor electric power-assisted steering system and a power-assisted steering method thereof. A main assisting motor and an auxiliary assisting motor in the steering system are connected through a one-way clutch assembly; an output shaft of the one-way clutch assembly is connected with a steering shaft connected to the lower portion of a steering wheel in parallel through a torsion coupler, and the output end of the torsion coupler is connected with a steering gear; the output shaft of the one-way clutch assembly is connected with the torsion coupler through a speed reducer, an overload protector and a normally closed electromagnetic clutch; the output end of a steering wheel torque and angle sensor, the control end of the main assisting motor, the control end of the auxiliary assisting motor and the control end of the normally closed electromagnetic clutch are connected with a control unit. The double-motor electric power-assisted steering system is provided with the two assisting motors which are connected through the one-way clutch assembly, controls a single assisting motor or the two assisting motors to simultaneously output torque through the control unit according to vehicle speed signals and steering wheel angle and toque signals, meets the requirement of commercial vehicles and the other vehicles for large assisting toque, improves fuel economy for the commercial vehicles, and reduces the operation cost.

Description

【Technical Field】 [0001] The invention relates to the technical field of power steering, in particular to an 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 ideal. At the same time, because the DC motor is used, the engine does not need to provide high-pressure oil, and the fuel economy of the vehicle is good. However, due to the limitation of vehicle battery power supply voltage and installation size, the output torque of electric power steering is small, which cannot meet the requirements of commercial vehicle steering assistance. The current application field is still limited to passenger cars or light commercial vehicles. [Content of the invention] [0003] The purpose of the present invention is to provide a dual-motor electric power steering system and a power steering method thereof, so as to solve the pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/04
Inventor 李耀华赵文亮焦森
Owner CHANGAN UNIV
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