Duplex type hydraulic powered steering pump for automobile

A hydraulic power, duplex technology used in automatic steering control components, steering mechanisms, steering rods, etc.

Inactive Publication Date: 2006-02-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a kind of automobile duplex hydraulic power steering pump, to overcome the deficiencies of existing steering pumps

Method used

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  • Duplex type hydraulic powered steering pump for automobile
  • Duplex type hydraulic powered steering pump for automobile
  • Duplex type hydraulic powered steering pump for automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0040] For the first embodiment of the present invention, when the engine speed is low, the output flow of the pump is also small. At this time, the two-position two-way reversing valve 5 is in the state of disconnecting the oil circuit, and the oil output from the auxiliary pump B can only flow to the outlet of the main pump A through the check valve 6, and merge with the oil output from the main pump A , to supply oil to the steering gear together.

[0041] As the engine speed increases gradually, the output flow of the steering pump also gradually increases. When the output flow of the vane pump exceeds the maximum flow limit limited by the flow-limiting and pressure-limiting control valve group, the overflow main flow of the current-limiting and pressure-limiting control valve group Valve 1 is opened, and the excess flow flows back to the oil suction port of the steering pump through the main valve port, thus limiting the flow output to the steering gear to ensure the safe...

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PUM

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Abstract

A double-type hydraulic power steering pump for car is composed of double blade pump unit, flow and pressure limiting control valve group and convergent control valve group. It features that according to the rotation speed of engine and the speed of car, the output oil of secondary pump unit is controlled to individually be returned at high speed, so decreasing the flow of the flow and pressure limiting control valve group and in turn the energy consumption.

Description

technical field [0001] The invention relates to an automobile hydraulic power steering device, in particular to an automobile double hydraulic power steering pump. Background technique [0002] For a power steering gear with a normal flow rotary valve structure, the operating force required to turn the steering wheel is affected by the output flow of the steering pump. Under the condition of constant external load, when the flow output from the steering pump to the steering gear becomes larger , the steering wheel operating force becomes smaller, and vice versa, the steering wheel operating force becomes larger. [0003] When the vehicle turns in place or turns at a low speed, in order to reduce the operating force required for steering and reduce the driver's work intensity, the steering pump outputs a large flow to the steering gear. As the driving speed of the vehicle increases, in order to ensure the safety of the steering, the operating force required to turn the steer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D6/00
Inventor 王庆丰姚晶宇
Owner ZHEJIANG UNIV
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