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Hydrostatic drive

A hydrostatic, driver technology used in engine starting, fluid pressure actuation devices, fluid pressure actuation system components, etc.

Inactive Publication Date: 2017-03-22
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The disadvantage of such a drive is that, when the hydraulic press is used as a starter motor, the flow direction must be maintained in order to re-start the internal combustion engine in the same predetermined direction of rotation as it had worked before

Method used

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Examples

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Embodiment Construction

[0033] figure 1 Shown is a circuit diagram of a first exemplary embodiment, which, in addition to starting the diesel engine, is also provided for steering and steering a moving machine tool and for this comprises a hydrostatic steering device 1 and other hydraulic load 2. The drive is used in combination with a diesel engine 4 , the crankshaft 6 of which can be coupled to the drive shaft 8 of a zero-crossing adjustable hydraulic machine 10 designed as a through-rotating (durchschwenkbar) axial piston machine. Its housing 12 has a tank connection T and a pump connection P for the main volume flow of the hydraulic machine 10 , wherein the two connections T, P are permanently and specifically provided with high and tank pressure.

[0034] The pump connection P is connected to the steering device 1 and the other loads 2 and to the high-pressure accumulator 16 via a branched pump line 14 , which can generally also be referred to as a working line. For this purpose, the pump line...

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PUM

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Abstract

What is disclosed is a hydrostatic drive having a diesel engine and having a hydrostatic adjustable machine (10) which in normal operation as a pump can supply multiple consumers. The machine has a pressure / flow regulator (34) to which is communicated, according to the load-sensing principle, the highest load pressure of the consumers, in particular when the machine is operated as a pump. In order to realize a start / stop function of the diesel engine, it is possible for a previously charged high-pressure reservoir (16) to supply the hydrostatic machine, which then acts as a starter motor for the diesel engine. In order to switch from pump to starter motor, the hydro-machine is adjusted over zero. In order for this to take place quickly and reliably, it is possible for the pressure / flow regulator to be deactivated by means of a switching valve (48) and for the adjustment device to be supplied with an adjustment pressure medium via the switching valve, which medium is taken from the high-pressure reservoir or from an auxiliary reservoir.

Description

technical field [0001] The invention relates to a hydrostatic drive, which is provided in particular for starting an internal combustion engine, in particular a diesel engine, and has the features of the preamble of claim 1 . Background technique [0002] The hydraulic machines of such hydrostatic drives are driven by an internal combustion engine, mostly a diesel engine, as a pump. In operation as a pump, the pressure medium volume flow is supplied, for example, to a hydropneumatic high-pressure accumulator, which is also referred to simply as a hydraulic accumulator, or to another hydraulic load. The drive can be arranged on a mobile working machine, such as an excavator, and further hydraulic loads can be, for example, hydraulic steering and various lifting cylinders. [0003] Such a drive is disclosed in the publications US 3,384,027 and DE 20 2013 003 490 U1, in which the hydraulic machine—in addition to its supply to other hydraulic consumers—also carries a hydraulic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B1/02F15B21/14E02F9/22F02N7/08
CPCE02F9/2217E02F9/2246E02F9/2292E02F9/2296F02N7/08F15B1/024F15B1/027F15B21/14F15B2211/20523F15B2211/20553F15B2211/20561F15B2211/20569F15B2211/20576F15B2211/212F15B2211/6051F15B2211/6054F15B2211/6055F15B2211/6057F15B2211/653F15B2211/781F15B2211/88B60K6/12B60K2006/126F04B49/22F04B1/20Y02T10/62E02F9/2066E02F9/2232E02F9/2267E02F9/2275F02N7/06F15B1/033F15B11/161F15B2211/20546F15B2211/3052F15B2211/3053F15B2211/55F15B2211/625F15B2211/71
Inventor C.施皮尔福格尔M.马斯特O.克拉伊卡P.L.埃尔南德斯拉德拉D.班特勒
Owner ROBERT BOSCH GMBH