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

Abstract

The invention discloses a double-more electric power-assisted steering system and a power-assisted steering method thereof. A first steering shaft is connected under a steering wheel in the system and is connected with a second steering shaft through a universal joint. A steering wheel torque turning angle sensor is arranged under the steering wheel and used for acquiring torque and turning angle signals of the steering wheel in real time. A first power-assisted motor and a second power-assisted motor are connected through a first torque coupler in parallel, and a first electromagnetic clutch is connected between the second power-assisted motor and the first electromagnetic clutch. The output end of the first torque coupler is connected with the second steering shaft through a second torque coupler in parallel. The output end of the second torque coupler is connected with a steering gear through a third steering shaft. The double-more electric power-assisted steering system is provided with two power-assisted motors connected through the torque couplers so as to control the single power-assisted motor or the two power-assisted motors to simultaneously output torque according to required power-assisted torque and meets the large-torque demands of commercial passenger cars and the like, the fuel economy of commercial vehicles is improved, and operation cost is reduced.

Description

【Technical field】 [0001] The invention relates to a steering system, in particular to an electric power steering system and a power steering method thereof. 【Background technique】 [0002] The existing electric power steering system is safe and reliable, and the steering characteristic curve is 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 good. However, limited by the battery power supply voltage and installation size of automobiles, the output torque of electric power steering is relatively small, which cannot meet the requirements of commercial vehicle steering assistance. At present, the application field is still limited to passenger cars or light commercial vehicles. Therefore, from the perspective of fuel economy, the use of electric power steering system with large output torque has positive significance for improving the fuel economy of commercial vehicles a...

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

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