Automobile, and electric hydraulic power-assisted steering system and control method thereof

A hydraulic power steering and electric technology, applied in the direction of fluid steering mechanism, can solve problems such as unsatisfactory energy saving effect, and achieve the effect of improving fuel economy, improving work efficiency and high efficiency

CN101863284AActive Publication Date: 2010-10-20陕西法士特松正电驱系统股份有限公司
9 Cites 20 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2010-10-20

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses an electric hydraulic power-assisted steering system. In the system, a hydraulic pump pumps oil in an oil storage tank and outputs pressure oil to the pressure oil duct of the steering system; a pressure retaining valve comprises a pressure retaining valve core and a pressure retaining valve housing which are coaxial with the input shaft of a steering wheel and are nested with each other; the oil inlet of the pressure retaining valve is communicated with the pressure oil duct of the system; the oil return port of the pressure retaining valve is communicated with the oil storage tank; chambers on the two sides of the piston of a double-action power-assisted cylinder are respectively communicated with the two control oil ports of the pressure retaining valve; the piston of the double-action power-assisted cylinder is connected with the input shaft of the steering wheel through a transmission mechanism; the oil port of an energy accumulator is communicated with the pressure oil duct of the system; a detector is used for acquiring steering parameter signals and outputting the steering parameter signals to a control device; and the control device receives the steering parameter signals acquired by the detector, and determines whether to output a control signal to the electric drive device of a hydraulic pump according to the preset conditions. The invention also provides an automobile utilizing the electric hydraulic power-assisted steering system and a control method thereof.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of automobile steering control, in particular to an automobile and its electrohydraulic power steering system and control method. Background technique

[0002] As we all know, the power steering system is widely used in modern automobile technology to assist the driver to adjust the driving direction of the car, which greatly reduces the driver's effort when operating the steering wheel.

[0003] The traditional hydraulic power steering system is generally composed of hydraulic pump, oil pipe, pressure flow control valve body, V-shaped transmission belt, oil storage tank and other components; its power assist characteristics are determined by the steering servo valve and the oil supply of the oil pump. Regardless of whether the vehicle needs power steering or not, the power steering system is in working condition; in the actual working process, the engine needs to always drive the hydraulic pump to work, so ...

Examples

Embodiment Construction

[0025] The core of the present invention is to provide an electro-hydraulic power steering system, which effectively uses the cooperation of the accumulator and the pressure maintaining valve to store the energy of the system in the accumulator, and the hydraulic pump does not need to be in the working state in real time, so as to meet the actual needs On the basis of power assistance, the work efficiency and energy saving effect of the system can be effectively improved.

[0026] Without loss of generality, this embodiment will be described in detail below with pure electric vehicles as the main body and with reference to the accompanying drawings.

[0027] The orientation words such as up, down, left, and right mentioned in this article are defined based on the driver's perspective. It should be understood that the use of the aforementioned orientation words does not limit the scope of protection claimed in this application.

[0028] See figure 1 , which is a schematic diag...