EP0737800B1 - Vorrichtung zur Steuerung von in einem Zylinder einer Brennkraftmaschine komprimierten Luft mittels eines Dekompressionsventils - Google Patents
Vorrichtung zur Steuerung von in einem Zylinder einer Brennkraftmaschine komprimierten Luft mittels eines Dekompressionsventils Download PDFInfo
- Publication number
- EP0737800B1 EP0737800B1 EP96102565A EP96102565A EP0737800B1 EP 0737800 B1 EP0737800 B1 EP 0737800B1 EP 96102565 A EP96102565 A EP 96102565A EP 96102565 A EP96102565 A EP 96102565A EP 0737800 B1 EP0737800 B1 EP 0737800B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control
- pressure
- fuel
- cylinder
- line
- 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.)
- Expired - Lifetime
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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
- F02B21/00—Engines characterised by air-storage chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/08—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for decompression, e.g. during starting; for changing compression ratio
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/004—Aiding engine start by using decompression means or variable valve actuation
Definitions
- the invention relates to a device for control of in a cylinder of a diesel engine trapped gas by means of a decompression valve into a channel.
- Such devices are from DE 43 09 860 C1 and DE 39 04 497 C1 known.
- Devices can be in a cylinder of an internal combustion engine air compressed by a piston optionally in one connected to a compressed air reservoir Compressed air line or the exhaust line of the internal combustion engine being controlled. Taking the Compressed air from the cylinder takes place in the cylinder head arranged control valve, which is then opened becomes when the pressure of the compressed in the cylinder Air, for example, a predetermined operating pressure in the compressed air tank.
- control valve To operate the control valve is a control valve upstream control piston with a hydraulic or pneumatic control medium pressurized.
- control valve for example, in one Internal combustion engine decompression valve, if any be used.
- High-pressure pumps are known from practice by means of which, for example, suitably high pressures for common rail systems can be generated.
- a high-pressure line system is referred to as a common rail, in which always a sufficiently high pressure prevails to various consumers, such as Hydraulic or pneumatic cylinders, with one to be able to supply the necessary operating pressure.
- a variable valve control is known from DE 44 07 585 A1 known in which the gas exchange valves through fuel under high pressure can be controlled.
- the present invention is based on the object new use for the high pressure pumps described above or to provide possible applications.
- FIG. 6 An internal combustion engine is shown schematically in FIG six cylinders 1 shown, each of which gas exchange valves 2 known design and one decompression valve each 3 have 1 per cylinder.
- Exhaust pipes lead from the individual cylinders 1 4 to an exhaust gas turbocharger 5, which in turn connected to a charge air cooler 7 via a line 6 is.
- a line leads from the charge air cooler 7 and distribution system 8 to the individual cylinders 1 of the internal combustion engine.
- Compressed air lines also lead from the cylinders 1 9 to a compressed air reservoir 10, the generated in a known manner in the cylinders 1 Compressed air via the compressed air lines 9 to the compressed air store 10 can be fed.
- a switching valve 11 is arranged, which either the path from the compressed air line 9 to the compressed air reservoir 10 releases or in the cylinders 1 generated compressed air via a secondary line 12 to the exhaust lines 4 feeds the internal combustion engine.
- the switching valve 11 is of a suitable one Control device 15 controlled accordingly, so that it is avoided that in the compressed air reservoir 10 builds up too high a pressure or that If the pressure in the compressed air reservoir is too low 10 there a suitably high pressure by feeding of compressed air from the cylinders 1 of the internal combustion engine can build up.
- each individual cylinder selectively can be controlled depending on the compressed air requirement individual decompression valves 3 through the in one High-pressure system, for example a common rail system 13, pending system pressure opened or controlled, the control of each one Decompression valves 3 via solenoid valves 14 and a separate solenoid valve for each decompression valve 3 14 is provided so that the decompression valves can be specifically controlled.
- the pressure prevailing in the common rail system 13 e.g. by means of a dashed line in FIG. 1 generated high pressure pump 16, not shown, i.e. the pressure generated by the high pressure pump 16 indirect, i.e. via the common rail system 13, for actuation of the decompression valve 3 used.
- the common rail system 13 is a common rail an injection system of the internal combustion engine executed.
- FIG. 2 shows a common rail system 13 according to FIG. 1 in detail based on a schematic section through a cylinder shown in more detail.
- the cylinder 1 is covered by a cylinder head 17. Between the cylinder head 17 and a piston 18 arranged in each cylinder 1, a compression chamber 19 or combustion chamber is formed, into which air is sucked in via an inlet duct 20 with an inlet valve 21 and is compressed by the piston 18. An injection nozzle 22 also projects into each cylinder 1, via which fuel can be injected into the compressed air. The exhaust gas resulting from the combustion is discharged into the exhaust gas line 4 via an exhaust duct 23 with an exhaust valve 24.
- a decompression valve 3 is also provided in addition to the gas exchange valves 21 and 24, which controls a connection of the compression chamber 19 to a channel 26.
- Each individual channel 26 is connected to the manifold 9 outside the cylinder head.
- the decompression valve 3 has an actuating cylinder 27 which can be acted upon by fuel under high pressure in a controlled manner via the solenoid valve 14.
- the common rail system or high-pressure fuel system provided primarily for supplying the fuel injection nozzles 22 comprises the high-pressure pump 16, which is supplied by a fuel pump 28 from a fuel tank 29 under low pressure through a delivery line 30 fuel delivered.
- the fuel is fed from the high-pressure pump 16 under high pressure through a high-pressure line 31 into a high-pressure accumulator 32.
- a pressure control valve 25 is coupled to the high pressure pump 16, from which, depending on signals from the control unit 15 the pressure in the high-pressure accumulator 32 can be changed. From Pressure control valve 25 controlled from the high pressure pump 16 Fuel is fed into the fuel tank via a return line 36 29 derived.
- Each fuel injection nozzle 22 is now connected to the high-pressure accumulator 32 via a fuel injection line 33 and each actuating cylinder 27 via a control line 34.
- the direct control of the fuel, which is under the high storage pressure, both to the fuel injection nozzle 22 and to the piston of the actuating cylinder 27 takes place via solenoid valves 35 and 14, of which the solenoid valve 35 is arranged at the inlet of the fuel injector 22 and the solenoid valve 14 at the inlet of the actuating cylinder 27.
- the solenoid valves 14 and 35 are controlled by the electronic control unit 15 as a function of engine operating parameters or as a function of signals manually entered into the control unit 15. In addition to the options specified in the exemplary embodiment in FIG.
- the electronic control unit can also be used to control the decompression valves 3 in such a way that the decompression valves 3 are opened during the first engine starting phase to make it easier for the internal combustion engine to start up.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Valve Device For Special Equipments (AREA)
- Fuel-Injection Apparatus (AREA)
Description
- Fig. 1
- ein erstes Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung, und
- Fig. 2
- ein Common-Rail System 13 gemäß Fig. 1 im einzelnen anhand eines schematischen Schnittes durch einen Zylinder.
Der Zylinder 1 ist durch einen Zylinderkopf 17 abgedeckt. Zwischen dem Zylinderkopf 17 und einem in jedem Zylinder 1 angeordneten Kolben 18 ist ein Verdichtungsraum 19 oder Brennraum ausgebildet, in den über einen Einlaßkanal 20 mit Einlaßventil 21 Luft angesaugt und vom Kolben 18 verdichtet wird. In jeden Zylinder 1 ragt ferner eine Einspritzdüse 22, über die Kraftstoff in die verdichtete Luft eingespritzt werden kann. Über einen Auslaßkanal 23 mit einem Auslaßventil 24 wird das durch die Verbrennung entstandene Abgas in die Abgasleitung 4 abgeleitet.
Das Dekompressionsventil 3 besitzt einen Betätigungszylinder 27, der über das Magnetventil 14 gesteuert mit unter Hochdruck stehenden Kraftstoff beaufschlagbar ist.
Von der Hochdruckpumpe 16 wird der Kraftstoff unter hohem Druck durch eine Hochdruckleitung 31 in einen Hochdruckspeicher 32 eingespeist.
Die Magnetventile 14 und 35 werden von der elektronischen Steuereinheit 15 aus in Abhängigkeit von Motorbetriebsparametern oder in Abhängigkeit von manuell in die Steuereinheit 15 eingegebenen Signalen angesteuert. Neben den im Ausführungsbeispiel der Fig. 1 angegebenen Möglichkeiten, wie Motorbremsbetrieb oder Luftspeicherbetrieb durch Förderung der verdichteten Luft in den Speicher 10, ist auch eine Steuerung der Magnetventile 14 bzw. 35 zur Einblasung von Druckluft aus dem Speicher 10 über die Leitung 9 sowie Kanal 26 in den Verdichtungsraum 19 zur Verbesserung der Verbrennung möglich. Schließlich kann über die elektronische Steuereinheit auch eine Steuerung der Dekompressionsventile 3 derart vorgenommen werden, daß während der ersten Motorstartphase die Dekompressionsventile 3 für ein erleichtertes Anlaufen der Brennkraftmaschine geöffnet werden.
Claims (4)
- Vorrichtung zur Steuerung von in einem Zylinder (1) einer Dieselbrennkraftmaschine eingeschlossenem Gas mittels eines Dekompressionsventils (3) in einen Kanal (26), mit folgenden Merkmalen:1.1 Das Dekompressionsventil (3) ist über einen Betätigungszylinder (27) mit unter Hochdruck stehendem Kraftstoff in eine mindestens spaltweite Offenstellung verstellbar,1.2 der unter Hochdruck stehende Kraftstoff wird durch eine Steuerleitung (34) zugeführt, die von einer Kraftstoff-Hochdruckleitung (31) abgezweigt ist, welche mit einer KraftstoffHochdruckpumpe (16) und mindestens einer Kraftstoffeinspritzdüse (22) verbunden ist,1.3 ein erstes Steuerventil (35) ist zur Steuerung der Beaufschlagung der Kraftstoffeinspritzdüsen (22) mit unter Hochdruck stehendem Kraftstoff und ein weiteres Steuerventil (14) ist zur Steuerung der Beaufschlagung der Betätigungszylinder (27) mit unter Hochdruck stehendem Kraftstoff vorgesehen,1.4 die Kraftstoff-Hochdruckleitung (31) weist einen Hockdruckspeicher (32) auf, an den die Steuerleitung (34) der Betätigungszylinder (27) und jede Kraftstoffeinspritzdüse (22) für sich mittels einer Kraftstoff-Einspritzleitung (33) angeschlossen ist,1.5 die Betätigungszylinder (27) und die Kraftstoffeinspritzdüsen (22) sind unabhängig voneinander von der elektronischen Steuereinheit (15) aus über Magnetventile (14,35) ansteuerbar, und1.6 das Dekompressionsventil (3) ist im Zylinderkopf (17) zusätzlich zu den Gaswechselventilen (21,24) angeordnet.
- Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß
die von den Dekompressionsventilen (3)abführenden Kanäle (26) an eine Druckluftleitung (9) angeschlossen sind, von der aus das Gas wahlweise über ein Umschaltventil (11) zu einem Druckgasbehälter (10) oder in eine Abgasleitung (4) steuerbar ist. - Vorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß
die Hochdruckpumpe (16) mittels einer Steuerscheibe ansteuerbar ist. - Vorrichtung nach Anspruch 1, 2 oder 3,
dadurch gekennzeichnet, daß
zwischen einer Antriebseinrichtung für die Hochdruckpumpe (16) und der Hochdruckpumpe (16) ein Verstellgetriebe angeordnet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19514116A DE19514116A1 (de) | 1995-04-14 | 1995-04-14 | Vorrichtung zur Steuerung von in einem Zylinder einer Brennkraftmaschine komprimierter Luft |
DE19514116 | 1995-04-14 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0737800A2 EP0737800A2 (de) | 1996-10-16 |
EP0737800A3 EP0737800A3 (de) | 1997-03-26 |
EP0737800B1 true EP0737800B1 (de) | 1999-09-22 |
Family
ID=7759693
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96102565A Expired - Lifetime EP0737800B1 (de) | 1995-04-14 | 1996-02-21 | Vorrichtung zur Steuerung von in einem Zylinder einer Brennkraftmaschine komprimierten Luft mittels eines Dekompressionsventils |
Country Status (3)
Country | Link |
---|---|
US (1) | US5636611A (de) |
EP (1) | EP0737800B1 (de) |
DE (2) | DE19514116A1 (de) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3355997B2 (ja) * | 1997-05-30 | 2002-12-09 | 株式会社日立製作所 | 内燃機関の制御方法 |
DE19731102C2 (de) * | 1997-07-19 | 2003-02-06 | Bosch Gmbh Robert | System zum Betreiben eines Kraftstoffversorgungssystems für eine Brennkraftmaschine insbesondere eines Kraftfahrzeugs |
SE510835C2 (sv) * | 1997-08-26 | 1999-06-28 | Volvo Lastvagnar Ab | Förbränningsmotor med kompressorfunktion |
US6216667B1 (en) | 1999-11-12 | 2001-04-17 | Frank J. Pekar | Method and device for a supercharged engine brake |
US6715467B2 (en) * | 2002-08-21 | 2004-04-06 | Caterpillar Inc | Method and apparatus for engine braking |
US7191756B2 (en) | 2004-11-16 | 2007-03-20 | Ford Global Technologies, Llc | System and method for controling crankshaft position during engine shutdown using cylinder pressure |
EP1657420A1 (de) * | 2004-11-16 | 2006-05-17 | Ford Global Technologies, LLC, A subsidary of Ford Motor Company | Brennkraftmaschine und Verfahren zum kontrollierten Abstellen einer Brennkraftmaschine |
US7146960B2 (en) * | 2004-11-16 | 2006-12-12 | Ford Global Technologies, Llc | Engine shut down using fluid pump to control crankshaft stopping position |
US20070204827A1 (en) * | 2006-03-02 | 2007-09-06 | Kokusan Denki Co., Ltd. | Engine starting device |
US7556004B2 (en) * | 2006-10-16 | 2009-07-07 | Caterpillar Inc. | Bactrian rocker arm and engine using same |
DE102007061420B4 (de) | 2007-12-20 | 2009-11-26 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Vorrichtung zur Drucklufterzeugung für ein Fahrzeug und Verfahren zum Betreiben einer Vorrichtung zur Drucklufterzeugung |
JP4848474B1 (ja) * | 2011-05-08 | 2011-12-28 | 康仁 矢尾板 | 火花点火式4サイクルエンジン |
DE102011078913A1 (de) * | 2011-07-11 | 2013-01-17 | Robert Bosch Gmbh | Brennkraftmaschine, insbesondere für Hybridfahrzeuge |
US20140238338A1 (en) * | 2013-02-22 | 2014-08-28 | Hyundai Motor Company | Variable compression engine |
JP6182906B2 (ja) * | 2013-03-01 | 2017-08-23 | いすゞ自動車株式会社 | 内燃機関とその燃料供給方法 |
SE538553C2 (sv) * | 2014-10-15 | 2016-09-13 | Freevalve Ab | Förbränningsmotor samt metod för motorbromsning hos en dylikförbränningsmotor |
ES2571627B1 (es) * | 2014-11-26 | 2017-03-09 | Denersa, S.L. | Motor compuesto |
ES2571869B1 (es) * | 2014-11-26 | 2017-03-17 | Denersa, S.L. | Motor de ocho tiempos |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3426523A (en) * | 1966-10-26 | 1969-02-11 | Edward L Straub | Engine with compression braking system |
JPS5024630A (de) * | 1973-07-09 | 1975-03-15 | ||
JPS6075724A (ja) * | 1983-10-03 | 1985-04-30 | Akira Suzuki | 内燃機関の急速減速方法 |
DE3904497C1 (de) * | 1989-02-15 | 1990-01-25 | Man Nutzfahrzeuge Ag, 8000 Muenchen, De | |
SE467503B (sv) * | 1990-11-23 | 1992-07-27 | Volvo Ab | Foerbraenningsmotor med kompressorfunktion |
DE4301835C1 (de) * | 1992-10-31 | 1993-11-04 | Daimler Benz Ag | Motorbremse fuer eine dieselbrennkraftmaschine |
JP3316894B2 (ja) * | 1992-12-17 | 2002-08-19 | 株式会社デンソー | 蓄圧式燃料噴射装置の異常判断装置 |
DE4309860C1 (de) * | 1993-03-26 | 1994-06-09 | Daimler Benz Ag | Vorrichtung zur Steuerung von in einem Zylinder einer Brennkraftmaschine komprimierter Luft |
DE4407585C2 (de) * | 1994-03-08 | 1996-09-19 | Mtu Friedrichshafen Gmbh | Variable Ventilsteuerung |
DE4433258C1 (de) * | 1994-09-19 | 1996-03-07 | Daimler Benz Ag | Motorbremse für eine Dieselbrennkraftmaschine |
-
1995
- 1995-04-14 DE DE19514116A patent/DE19514116A1/de not_active Withdrawn
-
1996
- 1996-02-21 EP EP96102565A patent/EP0737800B1/de not_active Expired - Lifetime
- 1996-02-21 DE DE59603121T patent/DE59603121D1/de not_active Expired - Fee Related
- 1996-03-27 US US08/622,836 patent/US5636611A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0737800A2 (de) | 1996-10-16 |
DE59603121D1 (de) | 1999-10-28 |
DE19514116A1 (de) | 1996-10-17 |
US5636611A (en) | 1997-06-10 |
EP0737800A3 (de) | 1997-03-26 |
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