EP0095789A1 - Procédé et installation pour la commande de la recirculation des gaz d'échappement dans un compresseur à ondes de pression pour un moteur à combustion interne - Google Patents
Procédé et installation pour la commande de la recirculation des gaz d'échappement dans un compresseur à ondes de pression pour un moteur à combustion interne Download PDFInfo
- Publication number
- EP0095789A1 EP0095789A1 EP83200493A EP83200493A EP0095789A1 EP 0095789 A1 EP0095789 A1 EP 0095789A1 EP 83200493 A EP83200493 A EP 83200493A EP 83200493 A EP83200493 A EP 83200493A EP 0095789 A1 EP0095789 A1 EP 0095789A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- pressure wave
- intake air
- recirculation
- exhaust gas
- 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
Links
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/40—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with timing means in the recirculation passage, e.g. cyclically operating valves or regenerators; with arrangements involving pressure pulsations
Definitions
- the present invention relates to a method and a device for controlling the recirculation of exhaust gas in a pressure wave charger for an internal combustion engine according to the preamble of claims 1 and 5.
- a primary, ie, recirculation of exhaust gas into the compressed charge air which functions without additional devices
- the mixing of air and exhaust gas at the separating front of the two media in the pressure wave charger can be achieved in a certain speed and load range of the engine, for example in the center of gravity of a driving cycle, by arranging the control edges, in which the relaxed exhaust gas is not completely flushed out in the low-pressure part .
- the portion of the exhaust gas that is not flushed out is compressed in the high-pressure section together with the fresh air and enters the engine with it.
- This primary recirculation control via the control edge geometry worsens the effectiveness of the high-pressure side and also the idling properties. Since this recirculation control is carried out via the low-pressure flushing, it is also influenced by the low-pressure resistors, which can change over the course of time, particularly due to filter contamination.
- this solution has the disadvantage that the difference between charge air pressure and high pressure exhaust gas and also the boost pressure are reduced due to the removal of high pressure exhaust gas. But it works in this way a better adaptation of the degree of recirculation to the respective operating state of the engine than by primary exhaust gas recirculation alone.
- FIG. 1 shows part of the developed central section through the rotor space and the adjacent channels in the air or gas housing of a pressure wave charger for a diesel engine.
- the rotor space is designated 1
- the gas housing 2 and the air housing 3 each have one of the two high and low pressure exhaust gas channels, namely 4 and 5 ? and high and low pressure air channels 6 and 7 shown.
- the arrow 8 indicates the direction of rotation of the rotor, the arrows 9, 10, 11 and 12 the flow directions of the high-pressure exhaust gas coming from the engine, the compressed high-pressure air pushed out of the rotor, ie the charge air, of the low-pressure exhaust gas emitting from the rotor or the low-pressure air flowing into the rotor, ie the intake air.
- This degree of recirculation can be influenced by arranging baffles 13 or 14 either in the low-pressure air duct 7 or in the low-pressure exhaust gas duct 5 or in both ducts.
- baffles 13 or 14 either in the low-pressure air duct 7 or in the low-pressure exhaust gas duct 5 or in both ducts.
- both an intake damper 13 in the low-pressure air duct 7 and an exhaust damper 14 in the low-pressure exhaust gas duct 5 are provided.
- the axes of rotation 15, 16 'of these baffles lie in the middle of the baffles or the cross sections of the channels.
- Other flap arrangements or types of throttles, such as rotary slide valves or the like, are of course also possible, but they should deteriorate the intake resistance or the exhaust resistance as little as possible compared to the resistance of the free channels when the opening is fully open.
- baffles which, as mentioned, can be provided in one or in both channels, is explained with reference to FIG. 2, in which two rotor cells 17 are entered in the rotor space, the illustration of which has been omitted in FIG. 1.
- the baffles 13, 14 are omitted in FIG. 2.
- the dashed line 18 represents the course of the separating front, as it forms from the high-pressure area between the high-pressure exhaust gas duct 4 and the high-pressure air duct 6 when there is no recirculation of exhaust gas.
- the separating front 18 then remains in the high pressure area and in its further course up to the entry into the area of the low-pressure channels 5 and 7 always within the rotor space 1.
- no exhaust gas can enter channel 6, ie in the charge air, enter.
- the separating front 21 between the intake air and the exhaust gas to be returned remains until it enters the The next high pressure area is obtained approximately as in the upper part of FIG. 2 and is then pushed against and into the high pressure air duct by the front of the high pressure exhaust gases. Since a pressure wave machine generally has two high and two low pressure parts, the separating front 21 entered in the lower part of FIG. 2 does not come from the low pressure part 5 + 7 in the upper part of FIG. 2, but from the second, not shown, low pressure part, while the upper part Separating front 21 merges into the second high pressure part, not shown.
- FIG. 3 A block diagram of a pressure wave charger with controllable recirculation is shown in FIG. 3.
- 22 designate an intake air filter, 23 an intake silencer, 24 the pressure wave charger, 25 an exhaust silencer, 26 the intake line, 27 the exhaust line, 28 the high-pressure exhaust line, 29 the charge air line, 30 an intake port upstream of the air filter 22, in which the intake air side damper 31 is provided .
- this could also be arranged immediately before the junction of the low-pressure air duct in the rotor space, but also at any other point between the filter and the inlet of the intake air that is more convenient for installation, maintenance or actuation linkage the rotor space.
- a compensation element such as a pressure cell, can be provided in the actuating linkage for the storage flap.
- the control for the baffle flap will preferably be designed so that the flap is fully open when idling and in the upper load range and from a certain speed. Only a primary recirculation is effective in these areas.
- FIG. 4 shows an ideal recirculation map, wherein in the hatched area, the so-called "recirculation island" 32, the swivel angle ⁇ , see FIG. 6, the baffle flap can be constant or can be controlled in order to obtain the desired course of the degree of recirculation.
- the mussel curve 33 applies to constant recirculation.
- FIG. 7 schematically shows a device for controlling the flap position in a diesel engine as a function of the accelerator pedal position to compensate for a change in the intake resistance depending on the degree of contamination of the air filter and the speed.
- the intake air line 34 is flowed through in the direction indicated by the two flow arrows 35, i.e. the damper 36 lies in front of the air filter 37.
- the stowage flap 36 is actuated in the desired load or speed-dependent manner by the gas linkage 38, 39 via a resilient element installed between the rods 40, 41 in the form of a pressure can 42 shown in the secondary figure. In the main figure, this pressure can 42 is shown schematically as a spring.
- the double arrow 44 indicates this relationship.
- the adjustment of the flap 36 as would occur with a rigid connection of the gas linkage to the flap, is overlaid by the pressure cell 42, a correction movement which compensates for a change in the intake resistance as a result of filter contamination and / or a change in speed.
- the housing of the pressure cell 42 is connected to the rod 40 and its spring-loaded membrane 43, which is pressurized on both sides, is rigidly connected to the rod 41.
- the static pressures PvK and p nK in the intake air line upstream or downstream of the flap 36 can be used to apply the membrane 43.
- a different pressure difference preferably in the suction area of the pressure wave charger, could also prove useful for this.
- the compensation of a change in the intake resistance can also be achieved by a pressure cell 45, in which the pressure difference between the ambient air and the intake air line 49 after the air filter 46 is used to compensate for the change in the intake resistance, for which purpose a pressure decrease line 50 between the spring-loaded Top of the pressure cell 45 and the intake air line 49 is provided behind the filter.
- a stop that limits the flap swivel angle so that the intake air line can never be completely closed.
- a stop will preferably be provided as close as possible to the valve axis.
- Another advantageous measure for this purpose is to connect the flap to the snifting valve, through which the engine can suck the combustion air directly from the atmosphere during the start-up period, in such a way that the latter is opened when the flap is closed.
- Another option is to use a return spring that swings the flap back to the fully open position in the event of an accident.
- Simpler measures consist of using the flap To provide holes or to measure them only so large that they still keep part of the cross-section of the intake air line free at the largest possible swivel angle.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT83200493T ATE16626T1 (de) | 1982-06-02 | 1983-04-07 | Verfahren und einrichtung zur steuerung der rezirkulation von abgas in einem druckwellenlader fuer einen verbrennungsmotor. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH337182 | 1982-06-02 | ||
CH3371/82 | 1982-06-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0095789A1 true EP0095789A1 (fr) | 1983-12-07 |
EP0095789B1 EP0095789B1 (fr) | 1985-11-21 |
Family
ID=4254514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83200493A Expired EP0095789B1 (fr) | 1982-06-02 | 1983-04-07 | Procédé et installation pour la commande de la recirculation des gaz d'échappement dans un compresseur à ondes de pression pour un moteur à combustion interne |
Country Status (5)
Country | Link |
---|---|
US (1) | US4517950A (fr) |
EP (1) | EP0095789B1 (fr) |
JP (1) | JPS58222964A (fr) |
AT (1) | ATE16626T1 (fr) |
DE (1) | DE3361269D1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH668292A5 (en) * | 1985-12-02 | 1988-12-15 | Bbc Brown Boveri & Cie | Throttle flap for pressure pulse charge engine - has controlled leak-rate at zero setting to prevent engine overheating |
CH681738A5 (fr) * | 1989-11-16 | 1993-05-14 | Comprex Ag | |
DE102009029880A1 (de) * | 2009-06-22 | 2010-12-23 | Continental Automotive Gmbh | Turbolader und Verfahren zur Montage einer Regeleinrichtung eines Turboladers |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0152870A3 (fr) * | 1984-02-21 | 1985-10-09 | Comprex Ag | Procédé de régénération de filtre d'échappement pour moteurs à combustion |
US5839416A (en) * | 1996-11-12 | 1998-11-24 | Caterpillar Inc. | Control system for pressure wave supercharger to optimize emissions and performance of an internal combustion engine |
ATE254718T1 (de) * | 1997-08-29 | 2003-12-15 | Swissauto Eng Sa | Gasdynamische druckwellenmaschine |
FR2886673A1 (fr) | 2005-06-01 | 2006-12-08 | Renault Sas | Systeme et procede d'alimentation d'un moteur |
DE102006020522A1 (de) * | 2006-05-03 | 2007-11-08 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine |
FR2907505B1 (fr) * | 2006-10-23 | 2008-12-26 | Renault Sas | Procede d'evaluation du debit de gaz fourni a un moteur par un compresseur, et groupe motopropulseur exploitant ce procede |
JP4301295B2 (ja) * | 2007-01-18 | 2009-07-22 | トヨタ自動車株式会社 | 内燃機関のegrシステム |
DE102010054505B4 (de) * | 2010-12-14 | 2014-06-12 | Benteler Automobiltechnik Gmbh | Druckwellenladeranordnung und Verfahren zum Betreiben einer Druckwellenladeranordnung |
CN104246168A (zh) * | 2012-05-03 | 2014-12-24 | 博格华纳公司 | 排气涡轮增压器 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2215092A5 (fr) * | 1972-11-29 | 1974-08-19 | Bbc Brown Boveri & Cie |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2853987A (en) * | 1957-09-19 | 1958-09-30 | Ite Circuit Breaker Ltd | Diesel engine supercharged by the aerodynamic wave machine |
EP0072059B1 (fr) * | 1981-08-11 | 1986-05-07 | BBC Aktiengesellschaft Brown, Boveri & Cie. | Moteur à combustion interne suralimenté comprenant un filtre pour les particules des gaz d'échappement |
-
1983
- 1983-04-07 EP EP83200493A patent/EP0095789B1/fr not_active Expired
- 1983-04-07 AT AT83200493T patent/ATE16626T1/de not_active IP Right Cessation
- 1983-04-07 DE DE8383200493T patent/DE3361269D1/de not_active Expired
- 1983-05-03 US US06/491,215 patent/US4517950A/en not_active Expired - Lifetime
- 1983-05-30 JP JP58094218A patent/JPS58222964A/ja active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2215092A5 (fr) * | 1972-11-29 | 1974-08-19 | Bbc Brown Boveri & Cie |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH668292A5 (en) * | 1985-12-02 | 1988-12-15 | Bbc Brown Boveri & Cie | Throttle flap for pressure pulse charge engine - has controlled leak-rate at zero setting to prevent engine overheating |
CH681738A5 (fr) * | 1989-11-16 | 1993-05-14 | Comprex Ag | |
DE102009029880A1 (de) * | 2009-06-22 | 2010-12-23 | Continental Automotive Gmbh | Turbolader und Verfahren zur Montage einer Regeleinrichtung eines Turboladers |
Also Published As
Publication number | Publication date |
---|---|
DE3361269D1 (en) | 1986-01-02 |
EP0095789B1 (fr) | 1985-11-21 |
JPS58222964A (ja) | 1983-12-24 |
ATE16626T1 (de) | 1985-12-15 |
US4517950A (en) | 1985-05-21 |
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