A hydraulic hub motor assisted differential power steering control method

Abstract

The invention aims at solving a problem that higher requirements on steering power easiness, safety and so on cannot be guaranteed only by adopting the traditional hydraulic power steering system in the existing hydraulic auxiliary driving heavy commercial vehicle, discloses an auxiliary differential power steering control method for a hydraulic hub motor and belongs to an automobile control system. The auxiliary differential power steering control method for the hydraulic hub motor comprises the steps of adjusting the opening value of a hydraulic electromagnetic valve through feedforward table look-up control and feedback PID correction control; controlling left and right steering wheel hydraulic motors to generate a torque difference so as to realize an active differential power steeringfunction; and providing a vehicle steering power together with the traditional hydraulic power steering system. According to the auxiliary differential power steering control method for the hydraulichub motor; the vehicle steering power characteristic is more optimized through active adjusting of the hydraulic motors; the easiness and safety under the situation that the traditional hydraulic power steering system is invalid are guaranteed; and meanwhile, vehicle energy is also effectively distributed and utilized so that a certain energy-saving effect is realized.

Description

technical field [0001] The invention belongs to an automobile control system, and more precisely, the invention relates to a control method for hydraulic hub motor-assisted differential power steering. Background technique [0002] Heavy-duty commercial vehicles often run on roads with low adhesion coefficients such as mud, water, and sand, and the driving conditions of the vehicles are complex and changeable, so it is easy to cause insufficient driving force and drive wheel slippage. The use of hydraulic auxiliary drive technology can solve this problem. By installing a hydraulic hub motor in the front wheel hub of the vehicle, it can provide auxiliary drive force to the vehicle in a timely manner, making the vehicle change from a traditional rear-wheel drive vehicle to a four-wheel drive vehicle. This wheel hub hydraulic hybrid power system using hydraulic auxiliary drive technology, after adding an accumulator energy storage device, will give full play to its advantages i...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the problems that the existing hydraulic auxiliary drive heavy commercial vehicles cannot guarantee higher steering power portability and safety requirements only by the traditional hydraulic power steering system, and to provide a hydraulic hub motor assisted differential power assist steering control method

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