FI94665C - Method and apparatus for controlling the fuel injection into the combustion space of an internal combustion engine - Google Patents

Method and apparatus for controlling the fuel injection into the combustion space of an internal combustion engine Download PDF

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Publication number
FI94665C
FI94665C FI930426A FI930426A FI94665C FI 94665 C FI94665 C FI 94665C FI 930426 A FI930426 A FI 930426A FI 930426 A FI930426 A FI 930426A FI 94665 C FI94665 C FI 94665C
Authority
FI
Finland
Prior art keywords
fuel injection
controlling
combustion chamber
engine
internal combustion
Prior art date
Application number
FI930426A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI94665B (en
FI930426A0 (en
FI930426A (en
Inventor
Reijo Mononen
Original Assignee
Sampower Oy
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 Sampower Oy filed Critical Sampower Oy
Priority to FI930426A priority Critical patent/FI94665C/en
Publication of FI930426A0 publication Critical patent/FI930426A0/en
Priority to AU58870/94A priority patent/AU5887094A/en
Priority to PCT/FI1994/000042 priority patent/WO1994018443A1/en
Publication of FI930426A publication Critical patent/FI930426A/en
Publication of FI94665B publication Critical patent/FI94665B/en
Application granted granted Critical
Publication of FI94665C publication Critical patent/FI94665C/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
    • 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
    • F02B71/00—Free-piston engines; Engines without rotary main shaft
    • 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
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/08—Safety, indicating, or supervising devices
    • F02B77/085—Safety, indicating, or supervising devices with sensors measuring combustion processes, e.g. knocking, pressure, ionization, combustion flame
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/08—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically
    • G01L23/10—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically by pressure-sensitive members of the piezoelectric type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fuel-Injection Apparatus (AREA)

Description

1 946651 94665

Menetelmä ja laite polttoaineen ruiskutuksen ohjaamiseksi polttomoottorin palotilaan. - Förfarande och anordning för styrning av bränsleinsprutningen in i förbränningsutrymmet av en förbränningsmotor.Method and apparatus for controlling fuel injection into the combustion chamber of an internal combustion engine. - Förfarande och anordning för styrning av bränsleinsprutningen in i förbränningsutrymmet av en förbränningsmotor.

Tavanomaisissa kampiakselimoottoreissa käytetään polttoaineen ruiskutuksen ohjaukseen tyypillisesti mekaanista nokkaa, joka käyttää polttoainepumppua. Nokan muotoilulla määrätään pumpun painekäyrä, joka puolestaan määrää neulan avautumisen. Tällä järjestelyllä voidaan kuormituksen ja palopaineen vaihtelut ottaa huomioon ruiskutusmäärän säädössä vasta olennaisen viiveen jälkeen. Kuitenkin esim. vapaamäntämoottorin toiminnan hallinnassa on olennaisen tärkeää, että moottorin ohjausyksikkö voi tunnustella kuormitus- ja palotapahtumaa reaaliajassa ja pitää polttoaineen ruiskutuksen viiveettömässä hallinnassa.Conventional crankshaft engines typically use a mechanical cam that drives a fuel pump to control fuel injection. The design of the cam determines the pressure curve of the pump, which in turn determines the opening of the needle. With this arrangement, variations in load and fire pressure can be taken into account in the control of the injection rate only after a substantial delay. However, for example in controlling the operation of a free piston engine, it is essential that the engine control unit can sense the load and fire event in real time and keep the fuel injection under control without delay.

Tämä tavoite saavutetaan keksinnön mukaisella menetelmällä ja laitteella oheisissa patenttivaatimuksissa esitettyjen tunnusmerkkien perusteella.This object is achieved by a method and a device according to the invention on the basis of the features set out in the appended claims.

Seuraavassa keksintöä havainnollistetaan viittaamalla oheiseen piirustukseen, joka esittää keksinnön mukaista 1aitejärjeste-1 yä.The invention will now be illustrated by reference to the accompanying drawing, which shows a device system according to the invention.

Sylinterissä 1 liikkuu moottorimäntä 2, joka yhdessä sylinteri-kannen 3 kanssa rajoittaa palotilan. Kansi 3 on kiinnitetty tavanomaiseen tapaan kiinnityspulteilla 4, josta ainoastaan ' · · yhden yläpää on näytetty. Kiinnityspultin 4 ruuvin 5 alle asetettu aluslaatta 6 on pietsosähköinen anturi, jonka lähtösig-naali riippuu pultin 4 vetojännityksestä.In the cylinder 1, a motor piston 2 moves, which together with the cylinder head 3 limits the combustion space. The cover 3 is fastened in the usual way with fastening bolts 4, of which only the upper end of one is shown. The washer 6 placed under the screw 5 of the fastening bolt 4 is a piezoelectric sensor, the output signal of which depends on the tensile voltage of the bolt 4.

Pietsosähköinen anturi 6 on liitetty polttoaineen ruiskutuksen :·. ohjausyksikköön 7, joka puolestaan on liitetty pietsosähköiseen toimilaitteeseen 9. Toimilaite 9 ohjaa ruiskutussuuttimen 8 neulan avautumista ohjausyksiköltä 7 saadun ohjaussignaalin perusteella.The piezoelectric sensor 6 is connected to the fuel injection:. to the control unit 7, which in turn is connected to the piezoelectric actuator 9. The actuator 9 controls the opening of the needle of the injection nozzle 8 on the basis of the control signal received from the control unit 7.

2 946652 94665

Pietsosähköisen anturin 6 avulla ohjausyksikkö 7 voi tunnustella kuormitus- ja palotapahtumaa reaaliajassa ja pitää polttoaineen ruiskutuksen viiveettömässä hallinnassa. Anturin 6 signaali sisältää tiedon yksittäisen puristusiskun paineen nousunopeudesta. Jos esim. vapaamäntämoottorin tapauksessa paineen nousunopeus on liian suuri, voidaan pieni polttoaine-määrä ruiskuttaa ennakoidusti männän 2 pysäyttämiseksi ja päätyiskun estämiseksi. Myös varsinainen ruiskutus voidaan mitoittaa edellistä ruiskutusta pienemmäksi, luonnollisesti sen hetkinen kuormitus huomioonottaen. Erityisesti järjestely kuitenkin mahdollistaa välittömästi ruiskutusta seuraavan palopai-neen seurannan niin, että ruiskutuksen ja palopaineen vaihtelut seuraavat viiveettömästi kuormituksen vaihteluita.By means of the piezoelectric sensor 6, the control unit 7 can sense the load and fire event in real time and keep the fuel injection under delay control. The signal of the sensor 6 contains information on the rate of pressure rise of a single compression stroke. If, for example, in the case of a free-piston engine, the rate of pressure rise is too high, a small amount of fuel can be injected as intended to stop the piston 2 and prevent the end impact. The actual spraying can also be dimensioned smaller than the previous spraying, of course taking into account the current load. In particular, however, the arrangement makes it possible to monitor the fire pressure immediately following the injection, so that the variations in the injection and the fire pressure follow the variations in the load without delay.

Keksinnön mukaisten aluslaatta-anturien 6 käyttö on helppoa normaalien kiinnityspulttien kanssa. Anturi 6 ei myöskään joudu tekemisiin suurien lämpötilojen kanssa kuten esim. palotilaan sijoitetut anturit.The washer sensors 6 according to the invention are easy to use with normal fastening bolts. Sensor 6 also does not have to deal with high temperatures, such as sensors placed in the combustion chamber.

Pietsosähköinen anturi voidaan sovittaa myös muulla tavalla kiinnityspulttien 4 yhteyteen niin, että palopaineeseen verrannollinen signaali saadaan kiinnityspulttien 4 venymästä. Ruiskutussuuttimen 8 neulan avautumista ohjaava toimilaite 9 voi olla myös solenoidiventtii1i kuten on esitetty US-patentti-julkaisussa 4,628,881.The piezoelectric sensor can also be fitted in other ways in connection with the fastening bolts 4 so that a signal proportional to the fire pressure is obtained from the elongation of the fastening bolts 4. The actuator 9 for controlling the needle opening of the injection nozzle 8 may also be a solenoid valve as disclosed in U.S. Patent No. 4,628,881.

• < »• <»

Vaikka keksintö soveltuu käytettäväksi kaiken tyyppisissä polttomoottoreissa, joissa polttoaineen syöttö tapahtuu ruiskuttamalla, on keksintö erityisen käyttökelpoinen vapaamäntämoottorin yhteydessä. Yksi esimerkki vapaamäntämoottorista, jossa keksintöä voidaan soveltaa, on esitetty patenttijulkai-: sussa FI-80760.Although the invention is suitable for use in all types of internal combustion engines in which fuel is supplied by injection, the invention is particularly useful in connection with a free piston engine. One example of a free piston engine in which the invention can be applied is disclosed in FI-80760.

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Claims (3)

9466594665 1. Menetelmä polttoaineen ruiskutuksen ohjaamiseksi polttomoottorin palotilaan, jossa menetelmässä palotilan painetta tunnustellaan palotilaa rajoittavan sylinterikannen (3) kiinnityspul-tin (4) vetojännitystä tunnustelevalla pietsosähköisellä anturilla (6) tai venymäliuska-anturilla (6'), tunnettu siitä, että vapaamäntämoottorin palotilaan ruiskutettavan polttoaineen ruiskutuksen ajoitusta ja määrää ohjataan reaaliaikaisesti kunkin yksittäisen ruiskutuskerran yhteydessä mainitun anturin (6) signaalista riippuvaisesti.A method for controlling fuel injection into the combustion chamber of an internal combustion engine, the method of sensing the pressure in the combustion chamber by a piezoelectric sensor (6) or a strain gauge (6 ') the timing and amount of spraying is controlled in real time in connection with each individual spraying, depending on the signal of said sensor (6). 2. Patenttivaatimuksen 1 mukainen menetelmä, tunnettu siitä, että mainittu anturin (6) signaali yhdistetään polttoaineen ruiskutusta ohjaavassa ohjausyksikössä (7) moottorin kuormitustehoa ilmaisevaan signaaliin.A method according to claim 1, characterized in that said signal of the sensor (6) is combined in the control unit (7) controlling the fuel injection with a signal indicating the load power of the engine. 3. Laite polttoaineen ruiskutuksen ohjaamiseksi polttomoottorin palotilaan, laitteeseen kuuluessa palotilaa rajoittavan sylinterikannen (3) kiinnityspultin (4) yhteydessä oleva pietso-sähköinen anturi (6), joka on liitetty polttoaineen ruiskutuksen ohjausyksikköön (7) mainitun kiinnityspultin (4) vetojännityksestä riippuvaisen signaalin antamiseksi ohjausyksikölle (7), tunnettu siitä, että ohjausyksikkö (7) on liitetty pietsosähköiseen toimilaitteeseen (9), joka ohjaa polttoaineen ruiskutussuuttimen (8) neulan avautumista, mainitun ruis-kutussuuttimen (8) ollessa järjestetty syöttämään polttoainetta vapaamäntämoottorin palotilaan.A device for controlling fuel injection into the combustion chamber of an internal combustion engine, the apparatus comprising a piezoelectric sensor (6) connected to the mounting bolt (4) of the combustion space limiting cylinder head (3) and connected to a fuel injection control unit (7) (7), characterized in that the control unit (7) is connected to a piezoelectric actuator (9) which controls the opening of the needle of the fuel injection nozzle (8), said injection nozzle (8) being arranged to supply fuel to the combustion chamber of the free piston engine.
FI930426A 1993-02-01 1993-02-01 Method and apparatus for controlling the fuel injection into the combustion space of an internal combustion engine FI94665C (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FI930426A FI94665C (en) 1993-02-01 1993-02-01 Method and apparatus for controlling the fuel injection into the combustion space of an internal combustion engine
AU58870/94A AU5887094A (en) 1993-02-01 1994-01-31 Method and apparatus for controlling the injection of fuel into the combustion chamber of an internal combustion engine
PCT/FI1994/000042 WO1994018443A1 (en) 1993-02-01 1994-01-31 Method and apparatus for controlling the injection of fuel into the combustion chamber of an internal combustion engine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI930426A FI94665C (en) 1993-02-01 1993-02-01 Method and apparatus for controlling the fuel injection into the combustion space of an internal combustion engine
FI930426 1993-02-01

Publications (4)

Publication Number Publication Date
FI930426A0 FI930426A0 (en) 1993-02-01
FI930426A FI930426A (en) 1994-08-02
FI94665B FI94665B (en) 1995-06-30
FI94665C true FI94665C (en) 1995-10-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
FI930426A FI94665C (en) 1993-02-01 1993-02-01 Method and apparatus for controlling the fuel injection into the combustion space of an internal combustion engine

Country Status (3)

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AU (1) AU5887094A (en)
FI (1) FI94665C (en)
WO (1) WO1994018443A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0671619A1 (en) * 1994-02-10 1995-09-13 K.K. Holding Ag Monitoring system for piston engines and compressors
GB2314882A (en) * 1996-06-24 1998-01-14 Cummins Engine Co Inc Controlling fuel supply to i.c. engine using cylinder pressure measurements derived from strain gauge in cylinder head bolt
DE10006341C2 (en) * 2000-02-12 2003-04-03 Mtu Friedrichshafen Gmbh Control system for an internal combustion engine
DE10236615A1 (en) * 2002-08-09 2004-02-26 Bayerische Motoren Werke Ag Pressure measurement in cylinder of vehicle engine with piezoelectric fuel injection valve, picks up signals from piezoelectric actuator itself
DE102006015503A1 (en) * 2006-03-31 2007-10-04 Fev Motorentechnik Gmbh Method for control of injection process of directly fuel injected internal combustion engine is implemented in such way that change of injection process is effected on basis of parameter recorded during first working cycle
WO2015195032A1 (en) * 2014-06-17 2015-12-23 Scania Cv Ab Internal combustion engine and method for detecting operating conditions of an internal combustion engine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2944535A (en) * 1958-01-23 1960-07-12 Stewart Warner Corp Free piston engine
DE1751543A1 (en) * 1968-06-15 1970-08-27 Kloeckner Humboldt Deutz Ag Electrically controllable injection valve
JPS5880535A (en) * 1981-11-10 1983-05-14 Ngk Spark Plug Co Ltd Controller for internal combustion engine
JPS6133932U (en) * 1984-07-31 1986-03-01 川崎重工業株式会社 Gas engine abnormality detection device

Also Published As

Publication number Publication date
WO1994018443A1 (en) 1994-08-18
FI94665B (en) 1995-06-30
AU5887094A (en) 1994-08-29
FI930426A0 (en) 1993-02-01
FI930426A (en) 1994-08-02

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