GB2114220A - Internal combustion engine with a compressor-turbine assembly - Google Patents

Internal combustion engine with a compressor-turbine assembly Download PDF

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Publication number
GB2114220A
GB2114220A GB08218903A GB8218903A GB2114220A GB 2114220 A GB2114220 A GB 2114220A GB 08218903 A GB08218903 A GB 08218903A GB 8218903 A GB8218903 A GB 8218903A GB 2114220 A GB2114220 A GB 2114220A
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GB
United Kingdom
Prior art keywords
pressure
valve
pressure chamber
combustion engine
internal combustion
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
GB08218903A
Other versions
GB2114220B (en
Inventor
August Hofbauer
Heinz Dorsch
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of GB2114220A publication Critical patent/GB2114220A/en
Application granted granted Critical
Publication of GB2114220B publication Critical patent/GB2114220B/en
Expired legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Supercharger (AREA)
  • Safety Valves (AREA)

Abstract

Valve 1 is disposed in a bypass line circumventing the turbine element of an i.c. engine exhaust driven turbo-charger thereby to influence air intake boost pressure. Valve 1 is of a pneumatic type having pressure chambers 18 and 17 separated by diaphragm 15. The pressure in chamber 17 is that prevailing upstream of the turbine and said pressure is communicated via through bore 25 in valve element 7. <IMAGE>

Description

SPECIFICATION internal combustion engine with a compressor turbine assert 5!y The invention relates to an internal combustion engine with a compressor-tu rbine assembly, whose boost pressure is influenceable by a regulating device which opens and closes a bypass line.
In a known regulating device(PorscheTechnische Information No. 6, Pages 1 and 2, February 16, 1976) a first pressure chamber is linked to an external control line, having a plurality of bends. This arrangement suffers frorn the disadvantage that it is costly to manufacture the line. In addition, the control line can be damaged by vibration and heat, thereby preventing correct regulation of the boost pressure which protects the internal combustion engine against overloads.
The object of the present invention isto provide protective devices on the regulating device which avoids the disadvantages referred to above.
The present invention consists in an internal combustion engine having a compressor-turbine assemblywhose boost pressure is influenceable bya regulating device comprising a valve which opens and closes a bypass line, the end of the valve remote from said bypass line being operatively connected to a spring controlling the opening pressure of the valve, a piston having a diaphragm mounted thereon with said spring interposed between a wall of the device and said piston, said diaphragm separating a first pressure chamber from a second pressure chamber, said first pressure chamber being pressurized through athrough bore inside the valve.
The primary advantages achieved bythe invention consist in the fact that the bore in the valve eliminates the need for an external line, whereby not only are expensive parts eliminated, but provision is also made for the regulating device to operate in a reliable manner. Moreover, when connecting the pressure chambers to the pressure upstream and downstream of the turbine an optimized boost pressure curve is produced, i.e., relatively high boost pressure at low rpm and avoidance of an extreme drop in boost pressure at high rpm.
The accompanying drawing is a cross-section through a boost pressure regulating device according to the present invention.
A regulating device 1 of an internal combustion engine with a compressor-turbine assembly is shown, by which the boost pressure is controlled by the opening and closing of a bypass line. The regulating device 1 comprises a valve housing 2, a lower diaphragm housing 3 and an upper diaphragm housing 4, held together by screws 5, 6.
Avalve 7 is disposed in the valve housing 2, the valve including a valve head 8 co-operating with a valve seat 9. The end 10 ofthe valve 7 remote from the seat9 projects into a chamber 11 formed by the diaphragm housings 3,4, and is connected with a plate 13, supporting a piston 12, bya screw 14.Adiaphragm 15 is mounted between the plate 12 and piston 13, the diaphragm being held by bolts 16 between the housings 3,4, to form a first pressure chamber 17 and a second pressure chamber 18 which are separate from one anther. The valve 7 is held in a closed position by a compression spring 19 which abuts the plate 12 at one end and a wall 20 of diaphragm housing 4atthe other.
A pressure line is mounted at 21 on the wa 11 20 af the diaphragm housing 4and communicates with the second pressure chamber 18. The first pressure chamber 17 is connected by a through bore 23 in valve 7 with the pressure side 24. The through bore 23 is formed by an axial bore 25 and a cross bore 26. When the pressure on the pressure side 24 rises above a predetermined level, the valve 7 moves in direction A, whereby the bypass line is opened for pressure regulation.
In the embodiment shown, the first pressure chamber 17 is connected to the pressure prevailing upstream of the turbine and the second pressure chamber 18 is connected with the pressure prevailing downstream of the turbine, thereby achieving an optimum boostairregulation.
1. An internal combustion engine having a compressor-turbine assembly, whose boost pressure is influenceable by a regulating device comprising a valve which opens and closes a bypass line, the end of the valve remote from said bypass line being operatively connected to a spring controlling the opening pressure of the valve, a piston having a diaphragm mounted thereon with said spring interposed between a wall of the device and said piston, said diaphragm separating a first pressure chamberfrom a second pressure chamber, said first pressure chamber being pressurized through a through bore inside the valve.
2. An internal combustion engine according to claim 1, wherein the first pressure chamber is connected to the pressure upstream of the turbine assembly and the second pressure chamber is con nected to the pressure downstream of the turbine assembly.
3. An internal combustion engine having a compressor-turbine assembly substantially as described with reference to, and as illustrated in, the accompanying drawing.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (3)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION internal combustion engine with a compressor turbine assert 5!y The invention relates to an internal combustion engine with a compressor-tu rbine assembly, whose boost pressure is influenceable by a regulating device which opens and closes a bypass line. In a known regulating device(PorscheTechnische Information No. 6, Pages 1 and 2, February 16, 1976) a first pressure chamber is linked to an external control line, having a plurality of bends. This arrangement suffers frorn the disadvantage that it is costly to manufacture the line. In addition, the control line can be damaged by vibration and heat, thereby preventing correct regulation of the boost pressure which protects the internal combustion engine against overloads. The object of the present invention isto provide protective devices on the regulating device which avoids the disadvantages referred to above. The present invention consists in an internal combustion engine having a compressor-turbine assemblywhose boost pressure is influenceable bya regulating device comprising a valve which opens and closes a bypass line, the end of the valve remote from said bypass line being operatively connected to a spring controlling the opening pressure of the valve, a piston having a diaphragm mounted thereon with said spring interposed between a wall of the device and said piston, said diaphragm separating a first pressure chamber from a second pressure chamber, said first pressure chamber being pressurized through athrough bore inside the valve. The primary advantages achieved bythe invention consist in the fact that the bore in the valve eliminates the need for an external line, whereby not only are expensive parts eliminated, but provision is also made for the regulating device to operate in a reliable manner. Moreover, when connecting the pressure chambers to the pressure upstream and downstream of the turbine an optimized boost pressure curve is produced, i.e., relatively high boost pressure at low rpm and avoidance of an extreme drop in boost pressure at high rpm. The accompanying drawing is a cross-section through a boost pressure regulating device according to the present invention. A regulating device 1 of an internal combustion engine with a compressor-turbine assembly is shown, by which the boost pressure is controlled by the opening and closing of a bypass line. The regulating device 1 comprises a valve housing 2, a lower diaphragm housing 3 and an upper diaphragm housing 4, held together by screws 5, 6. Avalve 7 is disposed in the valve housing 2, the valve including a valve head 8 co-operating with a valve seat 9. The end 10 ofthe valve 7 remote from the seat9 projects into a chamber 11 formed by the diaphragm housings 3,4, and is connected with a plate 13, supporting a piston 12, bya screw 14.Adiaphragm 15 is mounted between the plate 12 and piston 13, the diaphragm being held by bolts 16 between the housings 3,4, to form a first pressure chamber 17 and a second pressure chamber 18 which are separate from one anther. The valve 7 is held in a closed position by a compression spring 19 which abuts the plate 12 at one end and a wall 20 of diaphragm housing 4atthe other. A pressure line is mounted at 21 on the wa 11 20 af the diaphragm housing 4and communicates with the second pressure chamber 18. The first pressure chamber 17 is connected by a through bore 23 in valve 7 with the pressure side 24. The through bore 23 is formed by an axial bore 25 and a cross bore 26. When the pressure on the pressure side 24 rises above a predetermined level, the valve 7 moves in direction A, whereby the bypass line is opened for pressure regulation. In the embodiment shown, the first pressure chamber 17 is connected to the pressure prevailing upstream of the turbine and the second pressure chamber 18 is connected with the pressure prevailing downstream of the turbine, thereby achieving an optimum boostairregulation. CLAIMS
1. An internal combustion engine having a compressor-turbine assembly, whose boost pressure is influenceable by a regulating device comprising a valve which opens and closes a bypass line, the end of the valve remote from said bypass line being operatively connected to a spring controlling the opening pressure of the valve, a piston having a diaphragm mounted thereon with said spring interposed between a wall of the device and said piston, said diaphragm separating a first pressure chamberfrom a second pressure chamber, said first pressure chamber being pressurized through a through bore inside the valve.
2. An internal combustion engine according to claim 1, wherein the first pressure chamber is connected to the pressure upstream of the turbine assembly and the second pressure chamber is con nected to the pressure downstream of the turbine assembly.
3. An internal combustion engine having a compressor-turbine assembly substantially as described with reference to, and as illustrated in, the accompanying drawing.
GB08218903A 1981-07-07 1982-06-30 Internal combustion engine with a compressor-turbine assembly Expired GB2114220B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813126707 DE3126707A1 (en) 1981-07-07 1981-07-07 "INTERNAL COMBUSTION ENGINE WITH A COMPRESSOR TURBINE UNIT"

Publications (2)

Publication Number Publication Date
GB2114220A true GB2114220A (en) 1983-08-17
GB2114220B GB2114220B (en) 1984-12-12

Family

ID=6136277

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08218903A Expired GB2114220B (en) 1981-07-07 1982-06-30 Internal combustion engine with a compressor-turbine assembly

Country Status (5)

Country Link
JP (1) JPS5810118A (en)
DE (1) DE3126707A1 (en)
FR (1) FR2509369A1 (en)
GB (1) GB2114220B (en)
IT (1) IT1151620B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2322163A (en) * 1997-02-13 1998-08-19 Daimler Benz Ag A by-pass valve for a turbocharger having a variable cross section area

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004044439B4 (en) * 2004-09-14 2006-09-21 A. Kayser Automotive Systems Gmbh Blow-off valve for a turbocharger
JP5963927B1 (en) * 2015-08-21 2016-08-03 三菱電機株式会社 Control device and method for internal combustion engine with supercharger

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5819310Y2 (en) * 1977-09-03 1983-04-20 石川島播磨重工業株式会社 Exhaust gas relief valve device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2322163A (en) * 1997-02-13 1998-08-19 Daimler Benz Ag A by-pass valve for a turbocharger having a variable cross section area
GB2322163B (en) * 1997-02-13 1999-01-06 Daimler Benz Ag Internal combustion engine with exhaust-gas turbocharger
US6035638A (en) * 1997-02-13 2000-03-14 Daimlerchrysler Ag Internal combustion engine with exhaust gas turbocharger

Also Published As

Publication number Publication date
IT8221795A0 (en) 1982-06-10
JPS5810118A (en) 1983-01-20
IT1151620B (en) 1986-12-24
GB2114220B (en) 1984-12-12
DE3126707A1 (en) 1983-01-27
FR2509369A1 (en) 1983-01-14

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PCNP Patent ceased through non-payment of renewal fee