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Hydraulic system for supply force aid to vehicle

A technology of hydraulic systems and motor vehicles, applied in the field of hydraulic systems, capable of solving problems such as power loss

Inactive Publication Date: 2006-05-10
TRW AUTOMOTIVE ELECTRONICS & COMPONENTS GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Of course, in this type of system the rotor has to work against the viscosity of the oil, so turbulence is created in the medium leading to power loss

Method used

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  • Hydraulic system for supply force aid to vehicle
  • Hydraulic system for supply force aid to vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] figure 1 The figure shows the hydraulic system of a motor vehicle power steering device 10 drawn in simplified form in an example according to the invention. The hydraulic system includes a reservoir 12 , a pump 14 driven by an electric motor 16 and a control valve 18 . Depending on the position of the control valve 18, a piston 22 movably supported in a cylinder 20 of the power steering device 10 can be moved to the left or to the right to provide steering force assistance in a desired direction. Fluid delivered by pump 14 from reservoir 12 is supplied to control valve 18 via pressure line 24 . Fluid flowing back from the power steering device 10 is conveyed back to the reservoir tank 12 by a return line 26 .

[0013] The electric motor 16 has a cooling jacket 28 which surrounds the hot running motor parts. The cooling jacket 28 defines a cooling chamber 30 through which the fluid of the return line 26 flows before it is sent back to the reservoir 12 .

[0014] f...

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PUM

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Abstract

A hydraulic system for powering a motor vehicle device includes a fluid circulation system. The fluid circulation system includes a pump (14) that delivers fluid from a reservoir (12) and an electric motor (16) that drives the pump (14). The electric motor (16) is provided with a cooling jacket (28) defining a cooling chamber (30) through which the fluid of the fluid circulation system flows.

Description

technical field [0001] The present invention relates to a hydraulic system for powering a motor vehicle device, the hydraulic system comprising a fluid circulation system including a pump delivering fluid from a reservoir and an electric motor driving the pump. Background technique [0002] Hydraulic systems of this type are known, for example, from published German patent application DE 197 44 599 A1 or from German utility model DE 202 05 936 U1. In particular, hydraulic systems of this type can be used for auxiliary hydraulic steering in power steering systems. Internal rotor motors are increasingly used in this type of hydraulic systems due to the power requirements of the response time of the steering system on the one hand and the need to achieve high efficiency with low energy consumption on the other hand. The use of such an electric machine with an inner rotor and an outer stator makes it possible to meet these needs, since there are significant advantages compared ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/06F04C11/00H02K9/19
CPCB62D5/064F04B53/08B62D5/0496H02K1/185
Inventor 约尔格·本德尔汉斯-乌尔里希·雅各布
Owner TRW AUTOMOTIVE ELECTRONICS & COMPONENTS GMBH & CO KG