EP1818516A1 - Soupape rotative pour une unité cylindre-piston - Google Patents

Soupape rotative pour une unité cylindre-piston Download PDF

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Publication number
EP1818516A1
EP1818516A1 EP06024759A EP06024759A EP1818516A1 EP 1818516 A1 EP1818516 A1 EP 1818516A1 EP 06024759 A EP06024759 A EP 06024759A EP 06024759 A EP06024759 A EP 06024759A EP 1818516 A1 EP1818516 A1 EP 1818516A1
Authority
EP
European Patent Office
Prior art keywords
valve
cylinder
control
pressure
controlled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06024759A
Other languages
German (de)
English (en)
Other versions
EP1818516B1 (fr
Inventor
Erik Schneider
Andreas Werler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IAV GmbH Ingenieurgesellschaft Auto und Verkehr
Original Assignee
IAV GmbH Ingenieurgesellschaft Auto und Verkehr
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IAV GmbH Ingenieurgesellschaft Auto und Verkehr filed Critical IAV GmbH Ingenieurgesellschaft Auto und Verkehr
Publication of EP1818516A1 publication Critical patent/EP1818516A1/fr
Application granted granted Critical
Publication of EP1818516B1 publication Critical patent/EP1818516B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L7/00—Rotary or oscillatory slide valve-gear or valve arrangements
    • F01L7/06—Rotary or oscillatory slide valve-gear or valve arrangements with disc type valves

Definitions

  • the invention relates to a control member for a cylinder-piston unit according to the preamble of claim 1.
  • the control member is effective for cylinder-piston units, which are operated with a working fluid, which rests under pressure at the inlet of the cylinder-piston unit.
  • the sealing of the working chambers is required both against the effective pressure from the outside of the inlet and against the effective through the expansion of the working fluid in the working space internal pressure.
  • the control of the inlet and outlet members is complicated by design, since conventional designs with camshafts, which are common for engines arranged in series, can be displayed only with great effort.
  • Dead space is the part of the working space that does not count towards the displacement. The remaining in the dead space, not ejected from the piston residual mass reduces the intake volume and increases the energy supply, as it gives less work in the re-expansion, as it absorbs during compression. The dead space is due to the free valve chambers and the axial piston clearance and should be as small as possible. (Dubbel, paperback for mechanical engineering, Springer-Verlag, 17th edition, P24)
  • the invention has for its object to provide a control member for a cylinder-piston unit in which a pressurized working fluid in the working space the cylinder-piston unit is relaxed, with a good sealing effect of the control member to be achieved and at the same time the dead space is minimized.
  • a control member according to claim 1.
  • a rotary valve and a pressure-controlled, externally operated valve are combined in the control member for the outlet, whereby a needs-based shut-off of the outlet with the rotary valve and the good sealing effect of the pressure-controlled valve are combined.
  • Pressure-controlled and externally operated means in the context of the application that the valve is biased held in the closed position and is opened externally actuated by controlled applied pressure. An opening movement of the valve is not effected by the pressure difference between the working space and the outlet, which is automatically generated when the rotary valve is opened or discharged, but rather a separate actuating pressure is applied in a controlled manner.
  • the valve covering the inlet is automatically opened by the pressure difference between the inlet and the working space.
  • An advantage of the invention is that the pressure-controlled, externally actuated valve is arranged such that after closing the inlet by the rotary valve, the working space is separated from the dead space by means of the valve, so that the working space comprises only the stroke volume.
  • the pressure-controlled, externally actuated valve is held biased against the cylinder head and thus closes the outlet.
  • the internal pressure in the working chamber increases, whereby the valve is additionally urged against the sealing surfaces in the cylinder head.
  • the rotary valve itself can also be made sealing against the cylinder head.
  • a rotary valve is used to control the inlets and outlets, which is particularly advantageous in a multi-cylinder axial piston machine, since the arrangement of the cylinder around a central output shaft allows a particularly simple control of inlet and outlet.
  • the rotary valve can be configured to simultaneously control the inlets and outlets of all cylinders and can run centrally in fixed relation to the speed of the output shaft.
  • the rotary valve is combined with a pressure-controlled, externally operated plate valve, which has the advantage that it at simple structural design achieves a very good sealing effect, without having to make elaborate seals, as necessary on the rotary valve.
  • the plate valve locks the cylinder and seals the working space safely due to the pressure difference.
  • the opening of the plate valve is externally actuated by the rotary valve, which has a control track for a control, which lifts the plate valve from its sealing seat in the cylinder head. It is thus achieved a flexible control by the rotary valve and a good sealing effect through the plate valve.
  • An advantage of the invention is that the pressure-controlled, externally actuated valve is arranged such that after closing the outlet by the rotary valve, the working space is separated from the dead space by means of the pressure-controlled, externally actuated valve, so that the working space comprises only the displacement.
  • the pressure-controlled, externally actuated valve is controlled by a control element which is mounted in the cylinder head and interacts with the rotary valve. The outlet opening of the rotary valve is thus controlled synchronously with the pressure-controlled, externally operated valve.
  • control is controlled by a control path located in the rotary valve. Elevations in the control track actuate the control, preferably a ball, which is urged against the valve and this lifts in the direction of working space of its sealing seat.
  • control element is controlled via a control opening located in the rotary valve, which can be connected to the inlet pressure upstream of the rotary valve. This offers the advantage that the pressure applied to the inlet can be used to open the valve, with a mechanical actuation of the control element is eliminated.
  • the pressure-controlled, externally actuated valve is a plate valve (so-called flutter valve), which is held biased against the cylinder head and has a particularly good sealing effect.
  • the good sealing effect of the plate valves is combined with the simple controllability of the inlets and outlets by the rotary valve.
  • FIG. 1 shows a section of a sectional view of a cylinder 1 of a steam-operated axial piston machine 2.
  • the steam flows via an inlet 17 into a working chamber 6 of a cylinder 1 and is expanded therein. Near the bottom dead center of the piston, the steam is discharged from the working space 6.
  • This state is shown in FIG. 1 for the left-hand cylinder 1.
  • the steam flows in the direction of the arrow 3 through an outlet 4, which extends through the cylinder head 5, from the working space 6.
  • the steam can flow out of the working space 6 only if a rotary valve 7 is positioned in the cylinder head 5, that there is an opening 8 in the rotary valve 7 at the level of the outlet 4.
  • the rotary valve 7 has a corresponding control path 10 with elevations, which the control 9 presses on a pressure-controlled, externally operated valve 11, for example, a spring-loaded plate valve, in the direction of arrow 12, if the working space 6 opposite to the outlet 4 to open and the opening 8 of the rotary valve 7 corresponds to the outlet 4.
  • the control track 10 has no or a reduced recess 13, so that a survey in the guideway presses the control element 9 against the valve 11.
  • the control element 9 is fully actuated by the survey in the control path 10, so that the control track 10 itself in the Section view is not visible.
  • the control track 10 When the working space 6 is to be closed relative to the outlet 4, the control track 10 has a recess 13, so that the valve 11 presses the control element 9 in the direction of the arrow 12 and thus the valve 11 separates the working space 6 from the outlet 4.
  • This state is shown in the right cylinder 1, in which the outlet 4 is closed, since the valve 11 is urged against its sealing seat due to the spring bias.
  • the valve 11 separates the working space 6 with respect to a dead space 14, which forms between the pressure-controlled, externally operated valve 11 and the rotary valve 7.
  • the valve 11 is held spring-biased in its closed position in the cylinder head 5.
  • FIG. 2 shows an alternative embodiment of the invention.
  • the rotary valve 7 comprises a control chamber 15 instead of the control path 10 shown in Figure 1.
  • the control chamber 15 is connected to the inlet 17 of the cylinder 1 via a channel 16, which is arranged in the rotary valve 7.
  • the control element 9 for example a control piston, is guided in a recess 20 in the cylinder head 5 and actuates the valve 11 in its opening direction when there is pressure in the control chamber 15. If there is no pressure at the control chamber 15, then the valve 11 is kept closed against its sealing seat (right cylinder).
  • the valve 11 is spring-biased and is pressed without actuating pressure in the control chamber 15 in the closed position against its sealing seat.
  • the internal pressure additionally acts, whereby the particularly good sealing effect of the valve 11 is supported.
  • the valve 11 is actuated via the separately supplied control pressure in the direction of the arrow 12 when the control chamber 15 is connected via the channel 16 with the inlet pressure.
  • Control chamber 15 and 16 channel are incorporated in the rotary valve 7 and move with this. If, during the rotation of the rotary valve 7, the duct 16 has arrived at the inlet 17, the control element 9 (in this case the control piston) is urged against the valve 11 by the pressure applied to the inlet 17.
  • the rotary valve 7 is coupled to a central output shaft 18 (not shown) so that the rotary valve 7 orbits in synchronism with the central output shaft 18 (FIG. 3).
  • the channel 16 and the control room 15 are as the opening 8 so introduced into the rotary valve 7 that they release in phase the outlet 4 and at the same time open the valve 11.
  • the axial piston machine 2 is shown in a plan view.
  • a central output shaft 18 four cylinders Z1-4 are arranged, which the type of axial piston 2 according to a swash plate - not shown - act and drive the central output shaft 18.
  • the rotary valve 7 is coupled to the output shaft 18 and thus ensures a clock-correct driving the respective inputs 17 and 4 outlets of the cylinder Z1-4.
  • openings for the respective inlets 17 and the outlets 4 are circumferentially on circular paths introduced, which release the inlets 17 of the respective cylinder Z1-4 during circulation of the rotary valve 7.
  • the control regime for input 17 and outlet 4 of the respective cylinder Z1-4 is determined with the position and size of the openings 8 in the rotary valve 7.
  • the guided in recesses 20 in the cylinder head 5 controls 9 can be actuated via the control slide 10 arranged in the rotary valve 7.
  • FIG. 4 shows schematically a schematic diagram of a cylinder-piston unit Z in a view from the inside of the cylinder head 5.
  • the automatic, pressure-controlled valve 21 is a plate valve made of a spring material and held taut against the inlet 17.
  • Another pressure-controlled, externally operated valve 11, which is designed as a plate valve is actuated by a control element 9. It is biased held against the cylinder head 5 and running the outlet 4 overlapping.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Valve Device For Special Equipments (AREA)
  • Reciprocating Pumps (AREA)
  • Fluid-Driven Valves (AREA)
EP06024759A 2006-02-09 2006-11-30 Soupape rotative pour une unité cylindre-piston Not-in-force EP1818516B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006006628A DE102006006628B3 (de) 2006-02-09 2006-02-09 Steuerorgan für eine Zylinder-Kolben-Einheit

Publications (2)

Publication Number Publication Date
EP1818516A1 true EP1818516A1 (fr) 2007-08-15
EP1818516B1 EP1818516B1 (fr) 2009-02-11

Family

ID=37905581

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06024759A Not-in-force EP1818516B1 (fr) 2006-02-09 2006-11-30 Soupape rotative pour une unité cylindre-piston

Country Status (3)

Country Link
EP (1) EP1818516B1 (fr)
AT (1) ATE422603T1 (fr)
DE (2) DE102006006628B3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021207291A1 (de) 2021-07-09 2023-01-12 Mahle International Gmbh Axialkolbenmaschine

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1227698A (en) * 1911-06-22 1917-05-29 Packard Motor Car Co Hydrocarbon-motor.
GB1496281A (en) * 1974-03-08 1977-12-30 Dana Corp Internal combustion engines
US4461151A (en) * 1979-05-07 1984-07-24 Kanesaka Technical Institute Ltd. Internal combustion engine
DE3509150A1 (de) * 1984-03-07 1986-09-18 Lutz 3013 Barsinghausen Piesbergen Ventilsteuerung bei einer brennkraftmaschine
US5558049A (en) * 1995-06-05 1996-09-24 Dubose; G. Douglas Variable orbital aperture valve system for fluid processing machines
DE19920023A1 (de) * 1999-04-27 2000-11-02 Vladimir Voltchkov Ventiltrieb
GB2373823A (en) * 2001-03-30 2002-10-02 Jack Trethowan Disc-type rotary valve for i.c. engines
US20020152983A1 (en) * 2001-04-18 2002-10-24 Barry Muth Rotary valve internal combustion engine
WO2003078805A1 (fr) * 2002-03-20 2003-09-25 Freiherr Weber Engineering Oeg Moteur a combustion interne a soupapes rotatives

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3841786A1 (de) * 1988-12-12 1990-06-21 Kuehner Hubert Zylinderkopf mit steuerscheibe fuer im otto-verfahren arbeitende achsial-kreiskolbenmotoren mit ruhenden zylindern
DE4342299A1 (de) * 1993-12-11 1995-01-26 Daimler Benz Ag Kältemittel-Kompressor für eine Klimaanlage eines Kraftfahrzeuges

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1227698A (en) * 1911-06-22 1917-05-29 Packard Motor Car Co Hydrocarbon-motor.
GB1496281A (en) * 1974-03-08 1977-12-30 Dana Corp Internal combustion engines
US4461151A (en) * 1979-05-07 1984-07-24 Kanesaka Technical Institute Ltd. Internal combustion engine
DE3509150A1 (de) * 1984-03-07 1986-09-18 Lutz 3013 Barsinghausen Piesbergen Ventilsteuerung bei einer brennkraftmaschine
US5558049A (en) * 1995-06-05 1996-09-24 Dubose; G. Douglas Variable orbital aperture valve system for fluid processing machines
DE19920023A1 (de) * 1999-04-27 2000-11-02 Vladimir Voltchkov Ventiltrieb
GB2373823A (en) * 2001-03-30 2002-10-02 Jack Trethowan Disc-type rotary valve for i.c. engines
US20020152983A1 (en) * 2001-04-18 2002-10-24 Barry Muth Rotary valve internal combustion engine
WO2003078805A1 (fr) * 2002-03-20 2003-09-25 Freiherr Weber Engineering Oeg Moteur a combustion interne a soupapes rotatives

Also Published As

Publication number Publication date
ATE422603T1 (de) 2009-02-15
DE502006002811D1 (de) 2009-03-26
DE102006006628B3 (de) 2007-04-26
EP1818516B1 (fr) 2009-02-11

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