EP0130433A1 - Machine à ondes de pression comprenant une soupape de sortie pour le gaz d'échappement - Google Patents

Machine à ondes de pression comprenant une soupape de sortie pour le gaz d'échappement Download PDF

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Publication number
EP0130433A1
EP0130433A1 EP84106843A EP84106843A EP0130433A1 EP 0130433 A1 EP0130433 A1 EP 0130433A1 EP 84106843 A EP84106843 A EP 84106843A EP 84106843 A EP84106843 A EP 84106843A EP 0130433 A1 EP0130433 A1 EP 0130433A1
Authority
EP
European Patent Office
Prior art keywords
flap
exhaust gas
pressure wave
wall
lever
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
EP84106843A
Other languages
German (de)
English (en)
Other versions
EP0130433B1 (fr
Inventor
Andreas Mayer
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
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 BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Priority to AT84106843T priority Critical patent/ATE23912T1/de
Publication of EP0130433A1 publication Critical patent/EP0130433A1/fr
Application granted granted Critical
Publication of EP0130433B1 publication Critical patent/EP0130433B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F13/00—Pressure exchangers
    • 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
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/32—Engines with pumps other than of reciprocating-piston type
    • F02B33/42—Engines with pumps other than of reciprocating-piston type with driven apparatus for immediate conversion of combustion gas pressure into pressure of fresh charge, e.g. with cell-type pressure exchangers

Definitions

  • the present invention relates to a pressure wave supercharger with an exhaust gas relief valve according to the preamble of claim 1.
  • a pressure wave supercharger for such engines is designed in such a way that it generates a boost pressure under load at the maximum engine speed that is higher than the boost pressure required to generate the permissible peak pressure without exhaust gas being blown off.
  • By blowing off exhaust gas, controlled e.g. from the boost pressure a high permissible boost pressure and thus a favorable torque curve and fuel consumption can then be achieved over a wide operating range.
  • Such a motor is elastic and a vehicle equipped with it can be driven lazily.
  • Blowing off exhaust gas does not need to be used in commercial vehicle engines, since these allow higher boost pressures and operate in a narrower speed range as passenger car engines. For commercial vehicle engines, it is therefore sufficient to design the pressure wave charger so that it delivers the maximum boost pressure in the desired operating range at which the peak value of the combustion pressure is still permissible.
  • a regulating device for regulating the boost pressure by deliberately blowing off the engine exhaust gas upstream of the pressure wave supercharger is known from CH-fatentartmeldung No. 2355 / 83-7.
  • the valve member used in the device described there, with which the blow-off channel, referred to in specialist circles as wastegate, is more or less released or closed, is a spring-loaded poppet valve.
  • the valve member is likewise spring-loaded and mushroom-shaped in the area of the sealing elements.
  • a flap valve has been used which does not require a spring in the blow-off area and is dependent on the exhaust gas pressure or, as in the mentioned Swiss patent application No. 2355 / 83-7, is actuated by another suitable process pressure.
  • the adjusting force acts on a lever which is connected to the valve shaft in a torsionally rigid manner.
  • Such a flap valve is much cheaper to produce than the two known valve types mentioned above.
  • the opening characteristic does not change as a result of the spring ceasing to exist.
  • the relaxed exhaust gases after they have done their compression work, together with the mixture of air and exhaust gas that has formed in the mixing zone, ie in the area of the interface between air and exhaust gas, must be completely in be flushed out the exhaust outlet.
  • This purging is supported by the intake air, which enters the rotor cells on the side opposite the exhaust openings, thereby cooling the rotor at the same time.
  • the rotor in order to achieve satisfactory compression efficiency, the rotor must be cooled even further.
  • the pressure wave charger has to draw in more air than it delivers compressed charge air to the engine. This additionally sucked-in air is called purge air and the ratio of purge air flow to charge air flow is the "degree of purge" of the pressure wave charger. This degree of flushing decreases with increasing engine speed and decreasing engine load.
  • wastegate Blow-off by wastegate primarily affects the overall efficiency and thus the specific fuel of a pressure wave supercharger, like a turbocharger consumption, but not the degree of rinsing. Because the rinsing energy is reduced in proportion to the compression energy.
  • the transverse component of the flow into the exhaust duct does not represent any serious impairment of the exhaust flow and thus the degree of purge.
  • the larger cross-component of the inlet speed significantly deteriorates the purge and thus also affects the compression efficiency.
  • the object of the present invention defined in claim 1 is to avoid these disadvantages of the flap valve which is superior to the known valve types in terms of cheap manufacture and simple construction.
  • Fig. 1 denotes a rotor housing, 2 an air housing and 3 a gas housing of a pressure wave charger.
  • the air housing 2 has a horizontal air inlet connection 6, through which air is sucked in from atmospheric pressure, and a vertical charge air outlet connection 7, see FIG.
  • FIG. 3 and 4 show the gas housing 3 with the exhaust gas relief valve 8 in a longitudinal section or in a side elevation.
  • the blow-off valve 8 has a flap 9 as the closing element.
  • This is provided with a rivet pin 10, which sits with axial and radial play in a bore in a plate-shaped flap lever 11 and is held therein by means of a washer 12 and a rivet head 13.
  • the flap lever 11 is rigidly connected to the lower end of a flap shaft 14, for example by welding.
  • This flap shaft is guided in a bearing bush 15 and extends obliquely upwards through the gas housing 3 to the outside, where it is connected with a lever 16 in a torsionally rigid manner is.
  • This carries at its free end a bolt 17 for connecting a linkage, not shown, which connects the flap 9 to a control device mentioned at the beginning.
  • a restriction screen 19 is provided at a distance around the flap 9.
  • the current threads which, when using a cheap flap instead of a more expensive, but axially symmetrically flowed plate or mushroom valve, impair the undisturbed outflow in the exhaust duct and thus the flushing of the rotor cells mentioned at the outset, immediately after passing through the annular gap released by the flap in a direction parallel to the axis of the exhaust outlet connection 5 is forced, as is indicated by the dash-dotted streamlines in FIG. 3.
  • the dash-dotted representation of the streamlines was chosen because the flap 9 is shown in the closed state. So it is the streamlines that would occur with the flap open.
  • This restriction screen 19 does not surround the entire circumference of the flap 9, but part of the same as a semicircular ring coaxial with the flap 9, only half of its circumference.
  • the two ends of this semicircular ring then run out into a tip, the inner boundaries of which, viewed radially inward, run parallel to the longitudinal edges of the flap lever 11.
  • the area of the restriction screen that is left blank for the flap lever 11 does not impair its directivity, since the narrowest point of the flap gap is located there and the flow also through the adjacent wall part of the exhaust gas outlet nozzle 5 is forced in the axis-parallel direction.
  • the axis of the restriction screen 20 is eccentric to the axis of the associated flap 21 by the distance x. This gives a larger outflow cross section after the flap gap.
  • the exhaust gas inlet connection 4 is not arranged on the upper side, as in the pressure wave charger according to FIGS. 1 and 2, but on the lower side.
  • restriction screen is also possible to design the restriction screen as a full circular ring, which thus coaxially or eccentrically surrounds the entire circumference of the flap.
  • the flap lever must then be cranked accordingly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Supercharger (AREA)
  • Fluid-Driven Valves (AREA)
  • Exhaust Gas After Treatment (AREA)
EP84106843A 1983-06-29 1984-06-15 Machine à ondes de pression comprenant une soupape de sortie pour le gaz d'échappement Expired EP0130433B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84106843T ATE23912T1 (de) 1983-06-29 1984-06-15 Druckwellenlader mit einem abgasabblasventil.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH356183 1983-06-29
CH3561/83 1983-06-29

Publications (2)

Publication Number Publication Date
EP0130433A1 true EP0130433A1 (fr) 1985-01-09
EP0130433B1 EP0130433B1 (fr) 1986-11-26

Family

ID=4258656

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84106843A Expired EP0130433B1 (fr) 1983-06-29 1984-06-15 Machine à ondes de pression comprenant une soupape de sortie pour le gaz d'échappement

Country Status (5)

Country Link
US (1) US4592330A (fr)
EP (1) EP0130433B1 (fr)
JP (1) JPS6013921A (fr)
AT (1) ATE23912T1 (fr)
DE (1) DE3461499D1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0240269Y2 (fr) * 1985-02-19 1990-10-26
JPS62174536A (ja) * 1986-01-27 1987-07-31 Mazda Motor Corp 圧力波過給機付エンジン
DE3922491A1 (de) * 1988-08-23 1990-03-01 Asea Brown Boveri Gasdynamischer druckwellenlader mit abgas bypass
US6055965A (en) * 1997-07-08 2000-05-02 Caterpillar Inc. Control system for exhaust gas recirculation system in an internal combustion engine
DE69823039T2 (de) * 1997-08-29 2004-11-25 Swissauto Engineering S.A. Gasdynamische druckwellenmaschine
JP5939052B2 (ja) * 2012-06-26 2016-06-22 株式会社Ihi 過給機
KR20160002754A (ko) 2013-03-12 2016-01-08 니혼바이린 가부시기가이샤 무기 나노 섬유 및 그 제조 방법
US10344666B2 (en) 2014-09-01 2019-07-09 Garrett Transportation I Inc. Turbine wastegate

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH349448A (de) * 1955-06-17 1960-10-15 Jendrassik Developments Limite Druckaustauscher
CH351141A (de) * 1956-03-29 1960-12-31 Brian Spalding Dudley Druckaustauscher
CH398185A (de) * 1961-01-30 1965-08-31 Power Jets Research And Dev Li Kraftanlage mit Druckaustauscher

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2800120A (en) * 1953-11-30 1957-07-23 Jendrassik Developments Ltd Pressure exchangers
GB775271A (en) * 1953-12-11 1957-05-22 Jendrassik Dev Ltd Improvements relating to pressure exchangers
US2836346A (en) * 1955-06-17 1958-05-27 Jendrassik Developments Ltd Pressure exchangers
US4120156A (en) * 1977-06-08 1978-10-17 The Garrett Corporation Turbocharger control
JPS608936Y2 (ja) * 1981-08-11 1985-03-30 三共理化学株式会社 重合研磨翼車輪
US4488532A (en) * 1981-11-30 1984-12-18 Bbc Brown, Boveri & Company, Limited Gas-dynamic pressure wave machine with exhaust gas bypass
DE3461846D1 (en) * 1983-05-02 1987-02-05 Bbc Brown Boveri & Cie Control device for a pressure-wave charger

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH349448A (de) * 1955-06-17 1960-10-15 Jendrassik Developments Limite Druckaustauscher
CH351141A (de) * 1956-03-29 1960-12-31 Brian Spalding Dudley Druckaustauscher
CH398185A (de) * 1961-01-30 1965-08-31 Power Jets Research And Dev Li Kraftanlage mit Druckaustauscher

Also Published As

Publication number Publication date
US4592330A (en) 1986-06-03
EP0130433B1 (fr) 1986-11-26
JPS6013921A (ja) 1985-01-24
ATE23912T1 (de) 1986-12-15
DE3461499D1 (en) 1987-01-15
JPH059618B2 (fr) 1993-02-05

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