Power-assisted steering torque compensation method and system based on rotating angle information of steering wheel

Abstract

The invention provides a power-assisted steering torque compensation method. The power-assisted steering torque compensation method comprises the following steps of detecting a rotating angle A and a rotating direction D of a steering wheel, and calculating out the angular speed Omega and the angular acceleration Sigma of the rotating of the steering wheel; according to the rotating direction D and the angular speed Omega, determining the basic torque compensation value Tq_bas required by an electronic hydraulic power-assisted steering system EHPS; according to the angular acceleration Sigma of the steering wheel, determining the amendment factor Factor of the basic torque compensation value Tq_bas; and according to the amendment factor Factor, amending the basic torque compensation value Tq_bas, and obtaining actual torque compensation value Tq_reserve. According to the power-assisted steering torque compensation method and system based on the rotating angle information of the steering wheel provided by the invention, accurate torque compensation value can be calculated through utilizing multi-direction and multi-type information of the steering wheel, and accurate calculation on a torque is realized at low cost, so as to reduce the consumption of automobile fuel.

Description

technical field [0001] The invention relates to the technical field of automotive electronic control, in particular to a power steering torque compensation method and system based on steering wheel angle information. Background technique [0002] Automobile steering system has roughly gone through pure mechanical steering (MS, MechanicalSteering) and power steering (PS, Power Steering) without assistance. With the development of technology, the PS system is gradually developing from the traditional hydraulic power steering (HPS, Hydraulic Power Steering) system to the electric hydraulic power steering (EHPS, Electric Hydraulic Power Steering) system and electric power steering (EPS) system. [0003] The electronic hydraulic power steering system EHPS has most of the advantages of mechanical hydraulic power, and at the same time reduces energy consumption, and the response is more sensitive. Choice of home models. The structure of the EHPS system mainly includes: power stee...

AI Technical Summary

Problems solved by technology

[0006] On the one hand, the existing problem is that due to the existence of the self-aligning torque, the torque required when the driver turns the steering wheel inward (towards the direction of 0 degrees of the steering wheel) is greater than that required when the driver turns the steering wheel outward (towards the direction of the maximum angle of the steering wheel). required torque

Therefore, this will cause a certain waste of torque, thereby increasing the fuel consumption of the vehicle

[0009] In view of this, in view of the above-mentioned problems existing in the existing power steering torque compensation technology of EHPS system based on steering wheel rotation angle, it is necessary to design a new power steering torque compensation method based on steering wheel angle information, so as to overcome the inconsistency of the calculated torque compensation value at the same time. Accurate problems and problems with excessive fuel consumption of the vehicle

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