EP0252316A1 - Moteur à combustion interne à surchargeur à onde de pression et lambda-sonde - Google Patents

Moteur à combustion interne à surchargeur à onde de pression et lambda-sonde Download PDF

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Publication number
EP0252316A1
EP0252316A1 EP87108266A EP87108266A EP0252316A1 EP 0252316 A1 EP0252316 A1 EP 0252316A1 EP 87108266 A EP87108266 A EP 87108266A EP 87108266 A EP87108266 A EP 87108266A EP 0252316 A1 EP0252316 A1 EP 0252316A1
Authority
EP
European Patent Office
Prior art keywords
pressure
exhaust gas
lambda probe
internal combustion
combustion engine
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
EP87108266A
Other languages
German (de)
English (en)
Other versions
EP0252316B1 (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.)
Comprex AG
Original Assignee
BBC Brown Boveri AG Switzerland
Comprex AG
BBC Brown Boveri France SA
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, Comprex AG, BBC Brown Boveri France SA filed Critical BBC Brown Boveri AG Switzerland
Priority to AT87108266T priority Critical patent/ATE59432T1/de
Publication of EP0252316A1 publication Critical patent/EP0252316A1/fr
Application granted granted Critical
Publication of EP0252316B1 publication Critical patent/EP0252316B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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 the circuitry of an internal combustion engine charged with a pressure wave supercharger according to the preamble of claim 1.
  • a “lambda probe” is installed between the engine and the exhaust gas particle filter as an oxygen sensor, the measurement signal of which is fed to a control system of the internal combustion engine, which is suitably adapted to the fresh air supply and / or the amount of fuel.
  • a “lambda probe" with a ZRO2 ceramic suitable for measuring the oxygen content in the exhaust gas of internal combustion engines relative to the oxygen content of the air is, for example, from the article by Hans-Martin Wiedenmann et al., "Heated Zirconia Oxygen Sensor for Stoichiometric and Lean Air- Fuel Ratios ", SAE Paper 840141, SAE Congres, Detroit, February-March 1984.
  • the oxygen partial pressure in the exhaust gas changes with the exhaust gas pressure.
  • the pressure of the exhaust gas in the exhaust system of an internal combustion engine is by no means constant, but depends strongly on the degree of clogging of the exhaust gas particle filter and the engine speed. With supercharged internal combustion engines, the pressure fluctuations in the exhaust system are still a lot greater, since the respective engine charge and the degree of clogging of the exhaust gas particle filter are added to the influences mentioned.
  • the pressure correction which could eliminate the influence of the exhaust gas pressure on the measurement signal of the lambda probe, requires the use of a pressure sensor and an electronic computer unit.
  • this is a complex solution because the pressure sensor in the exhaust system must be extremely corrosion-resistant.
  • the other precaution namely the installation of the lambda sensor in a bypass partial flow in the exhaust system, also proves to be a complex solution, be it in the circuit-appropriate installation of the auxiliary measure or in terms of the means used.
  • the invention solves the problem of providing for the direct installation of the lambda probe at a location of the circuit where the oxygen content to be measured is immediately available in an information-correct manner.
  • the advantages of the placement of the lambda probe according to the invention can essentially be seen in the fact that a faster response time of the lambda probe is achieved in the full flow of the low-pressure exhaust gases, because there flows more volume than in a bypass partial flow.
  • a pressure correction can also be dispensed with when measuring in full flow of the low-pressure exhaust gases because there are no pressure fluctuations.
  • the circuit shown in FIG. 1 consists of a motor 1, a pressure wave charger 2, an exhaust gas particle filter 3.
  • a throttle valve 4, which is adjusted by a servomotor 5, is placed in the air intake line 111 to the pressure wave charger.
  • a start valve or an automatic charge air flap 6 is placed in the line for the fresh air supply 222 to the engine 1.
  • the exhaust gas particle filter 3 is in the high-pressure exhaust gas line 333 installed, ie between engine 1 and pressure wave charger 2.
  • a lambda probe 7 acts in the low-pressure exhaust gas line 444, the arrangement of which is provided separately from a possible purge flow, preferably in the opening area of the low-pressure gas outflow channel 26 (FIG. 2).
  • the lambda probe 7 determines the oxygen content in the exhaust gas after it has performed charging work in the pressure wave charger 2. The measurement of the oxygen content is therefore carried out under constant pressure conditions. In the case of an internal combustion engine charged with a pressure wave supercharger 2, the person skilled in the art would not measure the oxygen concentration in the low-pressure exhaust gas 444 because this is mixed with purge air and the measured ⁇ therefore does not match the actual excess air number in the high-pressure exhaust gas 333.
  • the lambda probe 7 in the full flow of the low-pressure exhaust gas 444 therefore only functions properly if the purge degree of the pressure wave charger 2 ⁇ sp ⁇ 0 or if the exhaust gas recirculation Rz> 0.
  • the oxygen content measured by the lambda probe 7 in the full flow of the low-pressure exhaust gas 444 which comes about, for example, on the basis of the diffusion of the oxygen through a solid electrolyte, creates a measurement signal 9 for the Computer unit 8:
  • the corresponding control information then acts on the throttle valve 4 and / or the start valve 6. If a circuit does not have any filtering of the exhaust gases, the lambda probe 7 is used to reduce the NO x values.
  • the influence of the temperature fluctuations of the exhaust gas on the measurement signal 9 of the lambda probe 7 can also be reduced with particular advantage.
  • FIG. 2 it is shown as a development of a cylindrical section halfway up the cells through the rotor and through the adjoining parts of the side parts of the housing.
  • FIG. 2 it is shown as a single-cycle machine, which is expressed in that the gas housing 22 and the air housing 23 are provided on their sides facing the rotor 21 with only one high-pressure and one low-pressure opening.
  • the flow directions of the working media and the direction of rotation of the pressure wave machine are indicated by arrows.
  • the hot exhaust gases of the internal combustion engine enter through the high-pressure gas inflow channel 24 into the rotor 21, which is provided with axially straight cells 25 that are open on both sides, expand therein and leave it via the low-pressure gas outflow channel 26 into the exhaust, not shown.
  • Atmospheric fresh air is drawn in on the air side, flows axially into the rotor 21 via the low-pressure air inlet duct 27, is compressed therein and leaves it as charge air via the high-pressure air outlet duct 28 via a charge air cooler (not shown) to the engine.
  • the cell band consisting of the cells 25 is the development of a cylindrical section of the rotor 21, which moves to the right when the latter rotates in the direction of the arrow.
  • the pressure wave processes take place inside the rotor 21 and essentially cause a gas-filled space and an air-filled space to form.
  • the exhaust gas relaxes and then escapes into the low-pressure gas outflow duct 26, while in the second part of the fresh air drawn in is compressed and pushed out into the high-pressure air outlet duct 28.
  • the proportion of scavenging air falsifies the measurement, depending on the position of the lambda probe, in that a value that is larger than the real ⁇ would be measured. This would be e.g. the case when the probe would be in the area of the closing edge 31 of the low-pressure gas outflow channel 26.
  • the lambda probe 7 is therefore advantageously arranged in the region of the opening edge 32 of the low-pressure gas outflow channel 26, that is to say where there is a pure exhaust gas flow under all conditions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Testing Of Engines (AREA)
  • Measuring Fluid Pressure (AREA)
  • Supercharger (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
EP87108266A 1986-07-08 1987-06-08 Moteur à combustion interne à surchargeur à onde de pression et lambda-sonde Expired - Lifetime EP0252316B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87108266T ATE59432T1 (de) 1986-07-08 1987-06-08 Brennkraftmaschine mit druckwellenlader und lamda-sonde.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2749/86 1986-07-08
CH274986 1986-07-08

Publications (2)

Publication Number Publication Date
EP0252316A1 true EP0252316A1 (fr) 1988-01-13
EP0252316B1 EP0252316B1 (fr) 1990-12-27

Family

ID=4240740

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87108266A Expired - Lifetime EP0252316B1 (fr) 1986-07-08 1987-06-08 Moteur à combustion interne à surchargeur à onde de pression et lambda-sonde

Country Status (5)

Country Link
US (1) US4798049A (fr)
EP (1) EP0252316B1 (fr)
JP (1) JPS6325318A (fr)
AT (1) ATE59432T1 (fr)
DE (1) DE3767056D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3907939A1 (de) * 1989-01-27 1990-08-02 Asea Brown Boveri Einrichtung zur reinigung der abgase von dieselmotoren
DE102011003095A1 (de) * 2011-01-25 2012-07-26 Ford Global Technologies, Llc Verfahren zur Ermittlung der SauerstoffkonzentrationO2 in einer Gasströmung und Sauerstoffsensor zur Durchführung des Verfahrens

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5199257A (en) * 1989-02-10 1993-04-06 Centro Sviluppo Materiali S.P.A. Device for removal of particulates from exhaust and flue gases
JP2549913B2 (ja) * 1989-04-19 1996-10-30 富士写真フイルム株式会社 放射線像変換パネル
DE3928666A1 (de) * 1989-08-30 1991-03-07 Asea Brown Boveri Schaltung einer brennkraftmaschine
US5048470A (en) * 1990-12-24 1991-09-17 Ford Motor Company Electronically tuned intake manifold
US6055965A (en) * 1997-07-08 2000-05-02 Caterpillar Inc. Control system for exhaust gas recirculation system in an internal combustion engine
US8025199B2 (en) * 2004-02-23 2011-09-27 Tyco Healthcare Group Lp Surgical cutting and stapling device
US6589314B1 (en) 2001-12-06 2003-07-08 Midwest Research Institute Method and apparatus for agglomeration
EP1888886A1 (fr) * 2005-05-26 2008-02-20 Volvo Lastvagnar Ab Procede pour regenerer un systeme de post-traitement d'echappement
DE102006020522A1 (de) * 2006-05-03 2007-11-08 Robert Bosch Gmbh Verfahren zum Betreiben einer Brennkraftmaschine
DE102010049361A1 (de) * 2010-10-26 2012-04-26 Benteler Automobiltechnik Gmbh Druckwellenladeranordnung und Verfahren zum Betreiben einer Druckwellenladeranordnung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2354313A1 (de) * 1972-11-01 1974-05-09 Hitachi Ltd Mischungsverhaeltnis-regeleinrichtung fuer brennkraftmaschinen
EP0152870A2 (fr) * 1984-02-21 1985-08-28 Comprex Ag Procédé de régénération de filtre d'échappement pour moteurs à combustion
DE3526532A1 (de) * 1984-07-24 1986-02-13 Mazda Motor Corp., Hiroshima Einlassausbildung fuer brennkraftmaschine mit auflader

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55165432A (en) * 1979-06-12 1980-12-23 Sharp Corp Cooker
JPS6035546B2 (ja) * 1979-07-02 1985-08-15 トヨタ自動車株式会社 排気タ−ボチャ−ジャ付内燃機関の空燃比制御装置
JPS5681235A (en) * 1979-12-04 1981-07-03 Nippon Soken Inc Air-fuel ratio controller for internal combustion engine with supercharger
ATE19676T1 (de) * 1981-08-11 1986-05-15 Bbc Brown Boveri & Cie Aufgeladene brennkraftmaschine mit abgaspartikelfilter.
CH665002A5 (de) * 1984-11-09 1988-04-15 Bbc Brown Boveri & Cie Verfahren und einrichtung zum betrieb eines dieselmotors mit einer abgasfiltriereinrichtung.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2354313A1 (de) * 1972-11-01 1974-05-09 Hitachi Ltd Mischungsverhaeltnis-regeleinrichtung fuer brennkraftmaschinen
EP0152870A2 (fr) * 1984-02-21 1985-08-28 Comprex Ag Procédé de régénération de filtre d'échappement pour moteurs à combustion
DE3526532A1 (de) * 1984-07-24 1986-02-13 Mazda Motor Corp., Hiroshima Einlassausbildung fuer brennkraftmaschine mit auflader

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3907939A1 (de) * 1989-01-27 1990-08-02 Asea Brown Boveri Einrichtung zur reinigung der abgase von dieselmotoren
DE102011003095A1 (de) * 2011-01-25 2012-07-26 Ford Global Technologies, Llc Verfahren zur Ermittlung der SauerstoffkonzentrationO2 in einer Gasströmung und Sauerstoffsensor zur Durchführung des Verfahrens

Also Published As

Publication number Publication date
US4798049A (en) 1989-01-17
DE3767056D1 (de) 1991-02-07
JPS6325318A (ja) 1988-02-02
ATE59432T1 (de) 1991-01-15
EP0252316B1 (fr) 1990-12-27

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