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Power-driven automobile steering-by-wire system and control method

A technology for steering-by-wire and electric vehicles, applied in automatic steering control components, electric steering mechanisms, steering mechanisms, etc., to reduce motor current, achieve individualization and customization, and reduce power loss.

Inactive Publication Date: 2014-02-19
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In the previous patents, there is no electric vehicle steer-by-wire system motor using 42V voltage system

Method used

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  • Power-driven automobile steering-by-wire system and control method
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  • Power-driven automobile steering-by-wire system and control method

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Embodiment Construction

[0064] combined with Figure 1-14 , to further describe the present invention:

[0065] The structural block diagram of the electric vehicle steering system of the patent electric vehicle of the present invention is shown in figure 1, The steer-by-wire system for an electric vehicle includes three major modules: a steer-by-wire system controller 18 , a steering wheel force feedback module 19 and a front wheel steering module 20 . Wherein, the steer-by-wire system controller 18 includes a steering wheel force feedback control method 181 and a front wheel active steering control method 182 to control the steering wheel force feedback module 19 and the front wheel steering module 20 respectively. It also has a fault diagnosis algorithm for fault diagnosis of the steering-by-wire system; the intelligent display interface 23 of the electric vehicle steering-by-wire system and the steering mode selection interface 24 of the electric vehicle steering-by-wire system are installed...

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Abstract

The invention relates to a power-driven automobile steering-by-wire system and control method. The power-driven automobile steering-by-wire system is characterized by comprising a steering-by-wire system controller, a steering wheel force feedback module and a front wheel steering module. The control method includes the following steps that firstly, system initializing of the steering-by-wire system is performed and a single-chip microcomputer analog-digital conversion port, a timer and the like are initialized; secondly, a signal is collected and transmitted to an ECU to undergo signal processing; thirdly, steering wheel force feedback upper-layer control is carried out; fourthly, steering wheel force feedback bottom-layer control is carried out; fifthly, front-wheel rotation angle upper-layer control is performed; sixthly, front-wheel rotation angle bottom-layer control is performed. The power-driven automobile steering-by-wire system and control method has the advantages that a rotation angle transmission ratio is flexibly changed along with vehicle conditions including the vehicle speed, functions such as automobile side direction stability control and optimizing of the road sense of a diver are achieved; in addition, the driver can select a certain steering mode and a steering wheel force feedback mode according to the driving favor of the driver and personalized customization of the driving feature of the automobile is achieved.

Description

technical field [0001] The invention relates to a steering system and a control method, in particular to a wire-controlled steering system and a control method for an electric vehicle. Background technique [0002] Traditional automotive steering systems include mechanical steering systems, hydraulic power steering systems, and developing electric power steering systems, all of which retain a mechanical connection between the steering wheel and the steering wheel. The resulting disadvantage is that the ratio between the steering wheel angle and the steering wheel during the steering process, that is, the steering angle transmission ratio is basically constant with the speed of the vehicle, and the handling stability requirements at all speeds cannot be taken into account. The force transmission ratio is the ratio of the steering resistance torque of the steering wheel to the steering wheel torque, which is proportional to the steering angle transmission ratio. A fixed s...

Claims

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Application Information

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IPC IPC(8): B62D5/04B62D6/00B62D113/00
Inventor 于蕾艳
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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