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Hydraulic system

A hydraulic system and hydraulic technology, applied in the field of control valves, can solve problems such as high shaft power

Inactive Publication Date: 2010-01-13
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem arises precisely when the pump of the hydraulic system is directly driven by the crankshaft of the internal combustion engine: even if the hydraulic fluid is not reduced by the hydraulic consumer, a relatively high shaft power is required by the pump

Method used

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Examples

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Embodiment Construction

[0019] figure 1 A circuit diagram of an exemplary embodiment of a hydraulic system 1 according to the invention is shown. The hydraulic system includes a pump 2 which is driven by an internal combustion engine 3 . The drive takes place, for example, in that the drive shaft of the pump 2 is driven directly or indirectly via the crankshaft of the internal combustion engine 3 . The drive shaft 4 can be connected directly to the crankshaft, for example, but can also be driven via the crankshaft, for example via a gear transmission or a winding contact transmission. As soon as the internal combustion engine 3 is activated, the pump 2 is driven. The pump 2 comprises a suction side 5 and a pressure side 6 . The suction side 5 of the pump 2 is connected to an unpressurized storage tank 23 for hydraulic fluid. “Unpressurized” here means that the storage tank can be at ambient pressure, but in the case of a closed hydraulic system it can also be at a pressure higher or lower than th...

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Abstract

The invention relates to a hydraulic system, comprising a pump for delivering a hydraulic fluid from a suction side to a pressure side, wherein an accumulator is disposed on the pressure side, wherein a hydraulic control valve is disposed between the pump and the accumulator, the valve having at least two valve positions, wherein the pressure side of the pump is connected to the accumulator in a first valve position and is separated from the accumulator in a second valve position, wherein the pressure side of the pump is connected to the suction side in a second valve position via the controlvalve, and a baffle is disposed between the outlet on the pressure side and a second return surface of the control valve.

Description

technical field [0001] The invention relates to a hydraulic system comprising a pump for conveying hydraulic fluid from the suction side to the pressure side, and a control valve for use in such a hydraulic system, wherein a pump is arranged on the pressure side pressure storage. Background technique [0002] In order to generate hydraulic pressure in a motor vehicle, there are essentially three different approaches in the prior art, namely in that the hydraulic pump is driven directly by the internal combustion engine or in that the hydraulic pump is driven by an electric motor, wherein either the hydraulic pump is filled Hydraulic pressure accumulator or adjust the hydraulic pump as required. Hydraulic drives are used in vehicles in various ways, for example for operating the shifting mechanism of a CVT transmission or for shifting an automatic transmission or the like. Such a hydraulic subsystem is hereinafter referred to as a hydraulic consumer, corresponding to which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B1/02F16H61/00
CPCF15B2211/40507F16H61/0021F15B2211/50572F15B2211/57F16H2061/0034F15B2211/212F15B2211/25F15B2211/20538F15B1/021
Inventor M·施陶丁格L·伊艾兴M·格雷特勒E·米勒
Owner SCHAEFFLER TECH AG & CO KG
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