Control Method of Electrohydraulic Power Steering Based on Factor Compensation
A technology of hydraulic power steering and control method, which is applied to electric steering mechanism, power steering mechanism, steering mechanism, etc., can solve the problems of poor stability of electric hydraulic power steering due to changes in vehicle speed and temperature, and achieve enhanced steering stability and light steering. sexual effect
Active Publication Date: 2018-10-16
ZHENGZHOU YUTONG BUS CO LTD
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Problems solved by technology
[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, and propose an electro-hydraulic power steering control method based on factor compensation, which solves the problem that the existing electro-hydraulic power steering control method does not take into account the front axle load, vehicle speed and temperature changes The problem of poor stability of electrohydraulic power steering due to the influence of
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[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0026] Embodiment of the Control Method of Electrohydraulic Power Steering Based on Factor Compensation
[0027] When the electro-hydraulic power steering system is used to control the steering of electric vehicles, the steering force will change greatly due to changes in the load on the steering front axle or the vehicle speed, which will affect the steering stability. Moreover, under low temperature conditions, it is easy to appear that the steering has no power for a long time or when starting. Help with smaller problems. Therefore, the factors in the "Electrohydraulic Power Steering Control Method Based on Factor Compensation" in this embodiment mainly include: steering front axle load, vehicle speed and temperature. The steps implemented by the electrohydraulic power steering control method in this embodiment mainly include: (1) obtainin...
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The invention relates to a control method of electro-hydraulic power steering based on factor compensation. The control method comprises the following steps that electric currents of a steering motor and the rotation speed of a steering oil pump, corresponding to each steering oil hydraulic pressure, are measured by respectively detecting the steering oil hydraulic pressure of an electric vehicle under different steering front axle loads and different rotation speeds; according to the relationship between the calibrated electric currents and the rotation speeds, a rotation speed coefficient is obtained; the temperature of the steering hydraulic oil is detected in real time; when the temperature is lower than the set temperature, according to the established standard, the rotation speed coefficient corresponding to the temperature of the steering hydraulic oil is obtained; and an electro-hydraulic power steering model is established, and the actual rotation speed of the electric steering oil pump is calculated. According to the control method of electro-hydraulic power steering based on factor compensation disclosed by the invention, the influence that large fluctuation in the steering force is caused by the changes in the steering front axle loads or the changes in the vehicle speeds is fully taken into consideration, besides, the problem that steering power does not exist or is small in a low-temperature environment for a long time is effectively solved, and the steering maneuverability at a low speed of the vehicle and the steering road feel at a high speed of the vehicle are achieved simultaneously.
Description
technical field [0001] The invention relates to an electrohydraulic power steering control method based on factor compensation, and belongs to the field of vehicle power steering. Background technique [0002] New energy buses are divided into hybrid buses with engine idling shutdown function, pure electric buses without engines or fuel cell buses. Because the function of the engine driving the steering oil pump to provide steering assistance is interrupted or cannot be realized, new energy buses are widely used. Hydraulic power steering system. The energy supply mechanism of the electro-hydraulic power steering system is the electric steering oil pump, which is driven by the steering motor, and the steering oil pump mostly adopts the vane pump type. [0003] In the prior art, the electrohydraulic power steering system adopts a frequency conversion control method based on the change of steering fluid pressure corresponding to the change of current. In the non-steering cond...
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IPC IPC(8): B62D5/04B62D5/06
CPCB62D5/046B62D5/064
Inventor 李振山闫帅林张永强
Owner ZHENGZHOU YUTONG BUS CO LTD