Assisting power control device and method of electro-hydraulic composite steering system

Abstract

The invention discloses an assisting power control device and method of an electro-hydraulic composite steering system. Assisting power provided by the electro-hydraulic composite steering system is supplied by an electric assisting power module and an electric hydraulic assisting power module. The assisting power control device obtains driver ideal steering wheel torque by the adoption of a comprehensive road feeling intensity evaluation method combined with a steering wheel angle gradient and torque and according to a vehicle steering wheel angle, a torque signal, a vehicle speed signal anda vehicle lateral acceleration signal, the characteristic that an electric assisting power response is made accurately and quickly is used, the electric assisting power module provides an extra compensation moment for tracking, the problem existing in electro-hydraulic composite system steering road feeling consistency is solved, and the driver ideal steering road feeling requirement is met.

Description

technical field [0001] The invention belongs to the technical field of automobile power steering system control, and specifically refers to a power steering control device and a control method of an electro-hydraulic compound steering system. Background technique [0002] The power steering system is a key part to ensure the driving safety of the car. It can reduce the driver's manipulation force and improve the driving comfort. At present, the hydraulic power steering system used at home and abroad has the characteristics of large output torque, vibration attenuation, reliability and safety, etc., but it has the problem that the power assist cannot be adjusted with the speed, flutters at high speed, consumes a lot of energy, and has the problem of sluggish response of the power assist; The power steering system has the characteristics of quick response, adjustable power assist with speed, and better road feel. However, due to the limitation of electrical characteristics suc...

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Problems solved by technology

[0005] Aiming at the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a power assist control device and control method of an electro-hydraulic compound steering system, so as to solve the problem that the power assist steering system in the prior art cannot fully provide the driver with a satisfactory driving experience. And the problem of inconsistent steering feeling in the electro-hydraulic compound steering system

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