Control device for a hydrostatic gear driven by a drive engine
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0661400
(1984-10-16)
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우선권정보 |
DE-3338595 (1983-10-24) |
발명자
/ 주소 |
- Wuchenauer Johann (Opferstetten DEX)
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출원인 / 주소 |
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인용정보 |
피인용 횟수 :
2 인용 특허 :
5 |
초록
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A control device for a hydrostatic gear driven by a drive engine, preferably an internal-combustion engine, is described, having an auxiliary pump, which is driven synchronously with the drive engine speed, for the generation of a control pressure which may be adjusted by way of a regulating valve,
A control device for a hydrostatic gear driven by a drive engine, preferably an internal-combustion engine, is described, having an auxiliary pump, which is driven synchronously with the drive engine speed, for the generation of a control pressure which may be adjusted by way of a regulating valve, which is dependent upon the speed of the drive engine and which acts upon the setting mechanism for the hydrostatic gear. A pressure reducing valve (“inch”valve) is thereby provided for the purpose of shutting off the control pressure as a function of an external parameter and also for lowering the control pressure in the case of a load speed reduction of the drive engine (“partial inch”function).
대표청구항
▼
Control device for a hydrostatic gear driven by a drive engine, preferably an internal-combustion engine, comprising: an auxiliary pump driven synchronously with the drive engine to produce a control pressure, adjustable via a regulating valve and dependent upon the speed of the drive engine, in a c
Control device for a hydrostatic gear driven by a drive engine, preferably an internal-combustion engine, comprising: an auxiliary pump driven synchronously with the drive engine to produce a control pressure, adjustable via a regulating valve and dependent upon the speed of the drive engine, in a control line connected to the setting mechanism of the hydro-pump and/or the hydro-motor of the hydrostatic gear, a regulating device to limit the control pressure from a predetermined speed of the drive engine, a pressure reducing valve in the control line to eliminate the control pressure as a function of an external parameter, the pressure reducing valve comprising: (1) a spool valve which delimits a first control area connected with a control pressure medium inlet and a second control area connected with a pressureless outlet, said spool valve connecting the control pressure line leading to the setting mechanism of the hydro-pump and/or of the hydro-motor with the first or second control area via restrictors, and said spool valve having, on one side, a control surface with associated cylinder area on which surface control pressure medium is able to act upon the spool valve in the direction of adjustment for opening of the control pressure line to the pressureless outlet against the force of a pressure spring which acts on the other side of the spool valve and which may be adjusted by the external parameter, said cylinder area being connected to the control pressure line on the downflow side leading to the adjusting device thereby regulating the control pressure as a function of the speed of the drive engine, (2) a pair of measuring pistons one of which lies between the pressure spring and the spool valve and the other rests against the control surface of the spool valve each said measuring pistons having measuring surfaces which operate against each other and upon which said control pressure acts, an auxiliary control pressure line through which an auxiliary control pressure, dependent upon the speed of the drive engine, communicates with the control surface of said spool valve, and a pressure reservoir, to which the auxiliary control pressure medium may be supplied through a check valve which opens to the pressure reservoir, and through a 2/2 distributing valve arranged parallel to said check valve in the auxiliary control pressure line operating in the direction of the control surface of the spool valve, whereby the control pressure is reduced as a function of the position of a speed adjusting element of the drive engine as the distributing valve is closed when the speed adjusting element of the drive engine is in the position “acceleration”and is opened when the element is in the position “deceleration”.
이 특허에 인용된 특허 (5)
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Riedhammer Josef (Ulm DT), Control apparatus for an adjustable hydraulic machine driven by an adjustable driving motor.
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Hoffmann Helmuth (Bensberg-Steinacker DT), Control device for a driving unit comprising an internal combustion engine and a hydrostatic transmission.
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Nonnemacher Gerhard (Korntal DEX) Knodel Emil (Stuttgart DEX) Bosch Paul (Ludwigsburg DEX), Control device for a pumping arrangement.
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Alderson Loren L. (Nickerson KS) Truesdell Delbert E. (Conover OH), Priority flow valve.
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Miyao Takayuki (Toyota JA) Maeda Hiroaki (Toyota JA) Sato Masanori (Nagoya JA), Servo mechanism.
이 특허를 인용한 특허 (2)
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Rolf Truninger CH, Hybrid electric and hydraulic actuation system.
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Herrmann, Markus; Haupt, Josef; Roegner, Horst, Hydraulic control device for an automatic transmission.
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