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Electric power-assisted steering control method and control device for vehicles

An electric power steering and control device technology, which is applied to the arrangement of multiple different prime movers of power units, pneumatic power units, and general power units, etc., can solve problems such as discomfort, and minimize the feeling of discomfort, The power steering effect is remarkable and the effect of reducing the burden

Inactive Publication Date: 2010-06-16
东莞市精航达电动转向系统有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the fault caused in the sensor is not the main one, the driver will only feel a little uncomfortable feeling in the steering operation

Method used

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  • Electric power-assisted steering control method and control device for vehicles
  • Electric power-assisted steering control method and control device for vehicles
  • Electric power-assisted steering control method and control device for vehicles

Examples

Experimental program
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Embodiment Construction

[0034] The present invention will be described in detail below with reference to the drawings and embodiments.

[0035] Such as figure 1 As shown, the electric power steering device mainly includes an electric power steering device 60 to provide auxiliary steering force (steering torque) to the steering shaft 21 connected to the steering wheel 61. The steering shaft 21 includes an upper steering shaft 21a connected to a steering wheel 61 at its top end, a spline shaft 88 at the bottom end, and a universal coupling 21c connecting the spline shaft 88 and the lower steering shaft 21b. The pinion shaft 48 of the lower steering shaft 21b has a rack shaft 89, and the rack shaft has a rack 89a meshed with the pinion. The rack and pinion mechanism 84 is formed by the pinion shaft 48 and the rack shaft 89 (rack 89a). Tie rods 46 are provided at both ends of the rack shaft 89 and have outer ends for attaching the front wheel 62 to the tie rod 46.

[0036] The worm gear 44 and the worm whee...

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Abstract

The invention relates to electric power-assisted steering control method and control device thereof for vehicles. The method comprises the following steps of: storing normal mode calculating data and abnormal mode calculating data in a power-assisted control device, and calculating a target power-assisted torque by acquiring the steering torque of a steering wheel and the signal of vehicle speed; detecting whether fault factors causing the motor torque to deviate the mapping value of the target power-assisted torque exist or not by a fault detection device; if the fault factors do not exist, calculating the target power-assisted torque by the power-assisted control device based on the normal mode; and if the fault factors exist, selecting to calculate the target power-assisted torque based on the abnormal mode or stop power-assisted steering according to the magnitude of the vehicle speed. The control device comprises a torque sensor and a vehicle speed sensor, wherein the torque sensor and the vehicle speed sensor are respectively connected with an electric control unit, and the electric control unit is connected with a motor for power-assisted steering. In the invention, based on the security and the necessarily degree of the power-assisted steering to generate the steering power-assisted torque, the control of electric power-assisted steering is more scientific and reasonable.

Description

Technical field [0001] The invention relates to vehicle steering control technology, in particular to a vehicle electric power steering control method and a control device thereof. Background technique [0002] A vehicle electric power steering device that has been used so far detects the steering torque applied by the driver turning the steering wheel (hereinafter referred to as "steering wheel"), and makes the motor generate steering assist torque based on the detected steering torque. The controller controls the steering assist torque. The controller calculates the target assist torque based on the steering torque detected by the steering torque sensor and the vehicle speed detected by the vehicle speed sensor, for example, and controls the amount of current flowing through the motor based on the target assist torque to generate the desired steering assist torque. [0003] According to such an electric power steering device, if a malfunction occurs in the sensor, an incorrect s...

Claims

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Application Information

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IPC IPC(8): B60K5/04B60K6/08
Inventor 李军李翊李军良
Owner 东莞市精航达电动转向系统有限公司
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