A rack-and-pinion magnetic fluid electronically controlled hydraulic power steering device and control method
An electronically controlled hydraulic and power steering technology, applied in the field of vehicle engineering, can solve the problems of system stability and reliability not as good as mechanical components, can not be well compensated, difficult to use in large vehicles, etc. Simple structure and reliable operation
Active Publication Date: 2016-05-25
ZHEJIANG WANDA AUTOMOBILE DIRECTION MACHINE CO LTD
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Problems solved by technology
Since the electric motor directly drives the steering mechanism, it can only provide limited auxiliary power, which is difficult to use on large vehicles; at the same time, there are many electronic components, and the system stability and reliability are not as good as mechanical components; the electronic control unit determines the rotation direction of the motor and The size of the assist current and the control program have become the core technology of the electric power steering system. It is difficult to completely eliminate the overshoot. Disadvantages of the steering system
In the long run, the electric power steering system seems to be the development trend. It is light, energy-saving, and responsive. However, the disadvantages at the driving level cannot be well compensated for in the short term.
Method used
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[0026] like figure 1 As shown, the rack-and-pinion magnetic fluid electric control hydraulic power steering device of the present invention mainly includes a steering wheel 1, a steering column 2, a steering wheel torque sensor 3, a steering wheel angle sensor 4, a steering column gear shaft 5, a steering column gear 6, and a steering gear rack 7 , tie rod 8 , steering wheel 20 , magnetic fluid hydraulic booster 21 and vehicle electronic control unit 19 .
[0027] Wherein, the steering wheel 1, the steering column 2, the steering column gear shaft 5, the steering column gear 6, the steering gear rack 7, the steering tie rod 8 and the steering wheel 20 are sequentially connected to form a conventional mechanical rack and pinion steering mechanism. What the rack and pinion steering gear selects is the structural form of existing technology maturity on the vehicle; Each sensor can convert the torque value of the steering wheel and the angle value of the steering wheel into corre...
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The invention discloses a pinion-and-rack magnetofluid electronic control hydraulic power steering device and a control method. In the running process of a vehicle, the magnetofluid electronic control hydraulic power steering device is powered on, an automobile electronic control unit controls the power magnitude and direction of the magnetofluid electronic control hydraulic power steering device by adjusting voltage values at two ends of an electrode plate and the polarity of a power source. Compared with an electrical power steering system, the device has the advantages that an assistant motor and a complicated reducing mechanism are omitted, and the device is simple in structure, reliable in operation, low in fault rate and small in size and can be conveniently arranged on the vehicle; moreover, the pinion-and-rack magnetofluid electronic control hydraulic power steering device can realize functions which can be realized by the electrical power steering system on performance and functions, torque fluctuation brought by the assistant motor of the electrical power steering system is avoided by adopting a hydraulic power steering system, and the reliability is higher.
Description
technical field [0001] The invention belongs to the technical field of vehicle engineering, and in particular relates to power steering technology. Background technique [0002] At present, there are three main types of steering assist devices for automobiles: mechanical hydraulic power steering device, electronically controlled hydraulic power steering device and electric power steering device. [0003] Mechanical hydraulic power steering system: The mechanical hydraulic power steering system is mainly composed of steering oil tank, steering oil pump, steering control valve and steering hydraulic power cylinder. The mechanical hydraulic power steering system converts part of the engine power output into hydraulic pump pressure, and applies auxiliary force to the steering system to help the driver realize the steering action. The mechanical hydraulic power steering system is divided into two types: normal pressure hydraulic power steering system and constant flow hydraulic ...
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IPC IPC(8): B62D5/22
CPCB62D5/22
Inventor 张玉玺陈晓佳操文涛
Owner ZHEJIANG WANDA AUTOMOBILE DIRECTION MACHINE CO LTD