WO2015134355A1 - Method for actuating a pneumatic control capsule - Google Patents

Method for actuating a pneumatic control capsule Download PDF

Info

Publication number
WO2015134355A1
WO2015134355A1 PCT/US2015/018240 US2015018240W WO2015134355A1 WO 2015134355 A1 WO2015134355 A1 WO 2015134355A1 US 2015018240 W US2015018240 W US 2015018240W WO 2015134355 A1 WO2015134355 A1 WO 2015134355A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
mbar
diaphragm
regulating device
housing
Prior art date
Application number
PCT/US2015/018240
Other languages
French (fr)
Inventor
Ralf Christmann
Raduz ZAHORANSKY
Original Assignee
Borgwarner Inc.
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 Borgwarner Inc. filed Critical Borgwarner Inc.
Priority to DE112015000547.1T priority Critical patent/DE112015000547T5/en
Publication of WO2015134355A1 publication Critical patent/WO2015134355A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/105—Final actuators by passing part of the fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
    • F02B37/183—Arrangements of bypass valves or actuators therefor
    • F02B37/186—Arrangements of actuators or linkage for bypass valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/40—Application in turbochargers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/50—Kinematic linkage, i.e. transmission of position
    • F05D2260/52—Kinematic linkage, i.e. transmission of position involving springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00—Control
    • F05D2270/60—Control system actuates means
    • F05D2270/65—Pneumatic actuators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a method for actuating a pneumatic control capsule of a regulating device of an exhaust-gas turbocharger according to claim 1.
  • the activation of the charge-air pressure valve is performed using a relatively large control capsule which pulls the regulating flap closed under the action of negative pressure. This results in a relatively slow and relatively poor regulating characteristic.
  • the packaging situation is always highly critical because the control capsule is of large form.
  • a spring preload is applied to a diaphragm of the control capsule, which spring preload is sufficient to close the regulating device, in particular in the form of a regulating flap arrangement.
  • a negative pressure that is to say a pressure lower than ambient pressure
  • a positive pressure that is to say a pressure higher than ambient pressure
  • control capsule Furthermore, through the application of a positive pressure, a fast and precise regulating characteristic of the control capsule is attained.
  • FIG. 1 of the drawing is a perspective, cut-away illustration of an exhaust-gas turbocharger 1 according to the invention, which is equipped with a regulating device, in this case a regulating flap arrangement 2.
  • the regulating flap arrangement 2 comprises a bypass flap which makes it possible for the turbine inlet of the turbine housing to be connected to the turbine outlet when required.
  • the exhaust-gas turbocharger 1 has a control capsule 3 which comprises a housing 4 in which a spring 5 is arranged. Also arranged in the housing 4 is a diaphragm 6 which is preloaded by the spring 5, with a spring preload force that can be set for the usage situation, into a closed position of the regulating flap arrangement 2 which is illustrated in the figure.
  • a pressure chamber 7 which is connected via a pressure line 8 to a positive pressure source 9 which, as control pressure, uses the positive pressure prevailing downstream of the compressor 12, which is higher than ambient pressure.
  • the exhaust-gas turbocharger 1 or the control capsule 3 thereof has a control rod 10 which is connected at one end 11 to the diaphragm 6 and at the other end 12 to the regulating flap arrangement 2, as can be seen in detail from the figure.
  • a control valve 15, in particular in the form of a cycle valve, is arranged in the pressure line 8.
  • the control valve 15 can connect the pressure chamber 7 to a negative pressure source 14, which may be an internal or external negative pressure source.
  • the negative pressure source 14 provides at least a negative pressure greater than 10 mbar, that is to say a pressure which lies more than 10 mbar below ambient pressure, and can provide in particular 150 mbar and particularly preferably 200 mbar negative pressure.
  • control valve 15 can connect the pressure chamber 7 to the aforementioned positive pressure source 9.
  • the preload of the spring 5 is selected so as to be sufficient, in principle, for one actuation direction of the regulating flap arrangement, for example for the closing movement, and the negative pressure source 11 is activated only when required, it is possible for the size of the housing 4 of the control capsule 3 to be reduced considerably, which leads to the packaging advantages discussed in the introduction. Furthermore, the regulating characteristic of the control capsule 3 is improved considerably.
  • the described arrangement yields the advantage of a failsafe function.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Supercharger (AREA)

Abstract

The invention relates to an exhaust-gas turbocharger (1) having a regulating flap arrangement (2); and having a pneumatic control capsule (3), having a housing (4), in which housing there is arranged a spring (5) which preloads a diaphragm (6) into a first operating position, and in which housing there is arranged a pressure chamber (7) which is connected via a pressure line (8) to a positive pressure source (9); and having a control rod (10) which is connected at one end (11) to the diaphragm (6) and at the other end (12) to the regulating flap arrangement (2); characterized in that a control valve (15) is arranged in the pressure line (8), which control valve, for an actuation of the regulating flap arrangement (2), operatively connects the pressure chamber (7) to a negative-pressure source (14) which provides negative pressure of greater than 100 mbar, in particular 150 mbar and particularly preferably 200 mbar, and which control valve, for a further actuation of the regulating flap arrangement (2), operatively connects the pressure chamber (7) to the positive pressure source (9).

Description

METHOD FOR ACTUATING A PNEUMATIC CONTROL CAPSULE
DESCRIPTION The invention relates to a method for actuating a pneumatic control capsule of a regulating device of an exhaust-gas turbocharger according to claim 1.
For example in the case of a two-stage turbocharging arrangement with a low- pressure exhaust-gas turbocharger and a high-pressure exhaust-gas turbocharger, the activation of the charge-air pressure valve (or also of bypass valves) is performed using a relatively large control capsule which pulls the regulating flap closed under the action of negative pressure. This results in a relatively slow and relatively poor regulating characteristic. Furthermore, the packaging situation is always highly critical because the control capsule is of large form.
It is therefore an object of the present invention to provide a method for actuating a pneumatic control capsule, by means of which method it is possible for the size of the control capsule to be considerably reduced and for the control characteristic thereof to be improved.
This object is achieved by the features of claim 1.
Accordingly, it is provided according to the invention that a spring preload is applied to a diaphragm of the control capsule, which spring preload is sufficient to close the regulating device, in particular in the form of a regulating flap arrangement.
If the spring preload is no longer sufficient to impart the closing action, a negative pressure, that is to say a pressure lower than ambient pressure, is additionally applied to the diaphragm. If the regulating flap arrangement is to be opened, a positive pressure, that is to say a pressure higher than ambient pressure, is applied to the diaphragm.
This has the effect that the size of the control capsule can be reduced for example from the capsule standard DN80 to the capsule standard DN30.
Furthermore, through the application of a positive pressure, a fast and precise regulating characteristic of the control capsule is attained.
Dependent claims 2 to 4 relate to advantageous refinements of the method according to the invention.
Claims 5 and 6 define an exhaust-gas turbocharger according to the invention. Further details, advantages and features of the present invention become apparent from the following description of an exemplary embodiment with reference to the drawing. Figure 1 of the drawing is a perspective, cut-away illustration of an exhaust-gas turbocharger 1 according to the invention, which is equipped with a regulating device, in this case a regulating flap arrangement 2. In the example, the regulating flap arrangement 2 comprises a bypass flap which makes it possible for the turbine inlet of the turbine housing to be connected to the turbine outlet when required.
The exhaust-gas turbocharger 1 has a control capsule 3 which comprises a housing 4 in which a spring 5 is arranged. Also arranged in the housing 4 is a diaphragm 6 which is preloaded by the spring 5, with a spring preload force that can be set for the usage situation, into a closed position of the regulating flap arrangement 2 which is illustrated in the figure.
Also arranged in the housing 4 is a pressure chamber 7 which is connected via a pressure line 8 to a positive pressure source 9 which, as control pressure, uses the positive pressure prevailing downstream of the compressor 12, which is higher than ambient pressure.
Furthermore, the exhaust-gas turbocharger 1 or the control capsule 3 thereof has a control rod 10 which is connected at one end 11 to the diaphragm 6 and at the other end 12 to the regulating flap arrangement 2, as can be seen in detail from the figure.
As is also shown in schematically highly simplified form in the figure, a control valve 15, in particular in the form of a cycle valve, is arranged in the pressure line 8. For one actuation direction, for example the closing direction, the control valve 15 can connect the pressure chamber 7 to a negative pressure source 14, which may be an internal or external negative pressure source. The negative pressure source 14 provides at least a negative pressure greater than 10 mbar, that is to say a pressure which lies more than 10 mbar below ambient pressure, and can provide in particular 150 mbar and particularly preferably 200 mbar negative pressure.
For a further actuation of the regulating flap arrangement, for example for the opening thereof, the control valve 15 can connect the pressure chamber 7 to the aforementioned positive pressure source 9.
By virtue of the fact that, according to the invention, the preload of the spring 5 is selected so as to be sufficient, in principle, for one actuation direction of the regulating flap arrangement, for example for the closing movement, and the negative pressure source 11 is activated only when required, it is possible for the size of the housing 4 of the control capsule 3 to be reduced considerably, which leads to the packaging advantages discussed in the introduction. Furthermore, the regulating characteristic of the control capsule 3 is improved considerably.
Furthermore, in the exhaust-gas turbocharger 1 according to the invention, the described arrangement yields the advantage of a failsafe function.
In addition to the above written disclosure of the invention, reference is hereby explicitly made to the illustrative presentation of the invention in the figure.
LIST OF REFERENCE SIGNS
1 Exhaust-gas turbocharger
2 Regulating flap arrangement
3 Control capsule
4 Housing
5 Spring
6 Diaphragm
7 Pressure chamber
8 Pressure line
9 Positive pressure source
10 Control rod
1 1 First end
12 Second end
13 Compressor
14 Negative pressure source
15 Control valve

Claims

1. A method for actuating a pneumatic control capsule (3) of a regulating device (2) of an exhaust-gas turbocharger (1), having the following method steps:
- applying a spring preload to a diaphragm (6) of the control capsule (3) for the purpose of closing the regulating device (2);
additionally applying a negative pressure to the diaphragm (6) if the spring preload is no longer sufficient to close the regulating device (2); and
applying a positive pressure to the diaphragm (6) for the purpose of opening the regulating device (2).
2. The method as claimed in claim 1, characterized in that a negative pressure of greater than 100 mbar is applied.
3. The method as claimed in claim 1 or 2, characterized in that a negative pressure of greater than 150 mbar is applied.
4. The method as claimed in one of claims 1 to 3, characterized in that a negative pressure of greater than 200 mbar is applied.
5. An exhaust-gas turbocharger ( 1 )
having a regulating device (2); and
having a pneumatic control capsule (3),
having a housing (4), in which housing there is arranged a spring (5) which preloads a diaphragm (6) into a first operating position, and in which housing there is arranged a pressure chamber (7) which is connected via a pressure line (8) to a positive pressure source (9); and having a control rod (10) which is connected at one end (11) to the diaphragm (6) and at the other end (12) to the regulating device (2); characterized
in that a control valve (15) is arranged in the pressure line (8), which control valve, for an actuation of the regulating device (2), operatively connects the pressure chamber (7) to a negative-pressure source (14) which provides negative pressure of greater than 100 mbar, in particular 150 mbar and particularly preferably 200 mbar, and which control valve, for a further actuation of the regulating device (2), operatively connects the pressure chamber (7) to the positive pressure source (9).
6. The exhaust-gas turbocharger as claimed in claim 5, characterized in that the control valve (15) is in the form of a cycle valve.
PCT/US2015/018240 2014-03-04 2015-03-02 Method for actuating a pneumatic control capsule WO2015134355A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112015000547.1T DE112015000547T5 (en) 2014-03-04 2015-03-02 Method for actuating a pneumatic control box

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014203885.5 2014-03-04
DE102014203885 2014-03-04

Publications (1)

Publication Number Publication Date
WO2015134355A1 true WO2015134355A1 (en) 2015-09-11

Family

ID=54055748

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2015/018240 WO2015134355A1 (en) 2014-03-04 2015-03-02 Method for actuating a pneumatic control capsule

Country Status (2)

Country Link
DE (1) DE112015000547T5 (en)
WO (1) WO2015134355A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018208609A1 (en) * 2017-05-09 2018-11-15 Borgwarner Inc. Backplate and method of making and using the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4416115A (en) * 1980-06-05 1983-11-22 Toyo Kogyo Co., Ltd. Internal combustion engine with supercharger
US4445474A (en) * 1981-12-11 1984-05-01 Toyo Kogyo Co., Ltd. Air intake system for supercharged automobile engine
US4517803A (en) * 1983-04-22 1985-05-21 The Garrett Corporation Turbocharger compressor valve
US20070271917A1 (en) * 2004-01-30 2007-11-29 Guenther Vogt Actuating Element For A Supercharger In Combustion Engines
US20100300415A1 (en) * 2009-05-27 2010-12-02 Bell James E External Spring Supercharger Bypass Valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4416115A (en) * 1980-06-05 1983-11-22 Toyo Kogyo Co., Ltd. Internal combustion engine with supercharger
US4445474A (en) * 1981-12-11 1984-05-01 Toyo Kogyo Co., Ltd. Air intake system for supercharged automobile engine
US4517803A (en) * 1983-04-22 1985-05-21 The Garrett Corporation Turbocharger compressor valve
US20070271917A1 (en) * 2004-01-30 2007-11-29 Guenther Vogt Actuating Element For A Supercharger In Combustion Engines
US20100300415A1 (en) * 2009-05-27 2010-12-02 Bell James E External Spring Supercharger Bypass Valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018208609A1 (en) * 2017-05-09 2018-11-15 Borgwarner Inc. Backplate and method of making and using the same

Also Published As

Publication number Publication date
DE112015000547T5 (en) 2016-10-27

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