EP0822321A1 - Verfahren zum Abbremsen einer Viertakt-Brennkraftmaschine, insbesondere für den Antrieb eines Fahrzeuges - Google Patents
Verfahren zum Abbremsen einer Viertakt-Brennkraftmaschine, insbesondere für den Antrieb eines Fahrzeuges Download PDFInfo
- Publication number
- EP0822321A1 EP0822321A1 EP97102964A EP97102964A EP0822321A1 EP 0822321 A1 EP0822321 A1 EP 0822321A1 EP 97102964 A EP97102964 A EP 97102964A EP 97102964 A EP97102964 A EP 97102964A EP 0822321 A1 EP0822321 A1 EP 0822321A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- braking
- internal combustion
- combustion engine
- motor vehicle
- triggered
- 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
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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
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/04—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation using engine as brake
-
- 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
Definitions
- the invention relates to a method for braking a Four-stroke internal combustion engine according to the preamble of Claim 1, and a motor vehicle by an internal combustion engine is driven by this method can be braked.
- From DE-PS 34 28 626 is an actuator for an engine brake on a four-stroke internal combustion engine known, which is a throttle valve arranged in the exhaust pipe and an additional exhaust valve for each cylinder Blowing compressed air into the exhaust pipe.
- a throttle valve arranged in the exhaust pipe and an additional exhaust valve for each cylinder Blowing compressed air into the exhaust pipe.
- the object of the invention is to provide a method with which an internal combustion engine of the generic type faster and can be slowed down more effectively than with the Known engine brake is the case, so that this Internal combustion engine driven vehicle in particular Emergency can quickly be brought to a standstill. A however, rapid braking can also occur with a stationary one Internal combustion engine matter if any of these driven device must be shut down quickly.
- the pistons a high, driving back during the compression cycle Combustion pressure exerted extremely fast Braking the engine causes.
- the exhaust valves can have additional, e.g. from the above DE-PS 34 28 626 known, electrically or by a pressure medium be actuatable valves or normal gas exchange exhaust valves, if their tax times are changed like this able that the desired opening start is reached.
- the triggering of premature combustion can be in Otto internal combustion engines by bringing the Ignition point take place, that far beyond the usual early ignition goes out, and with diesel internal combustion engines corresponding early injection, which in turn is well before the early injection due to ignition delay takes place.
- diesel engines can also be used an ignition aid e.g. in the form of an ignition or Glow plug can be provided.
- a Device proposed that a device for early adjustment the ignition timing and / or the injection timing and if necessary to open at least one Exhaust valve per cylinder and an emergency switch for Activate this device, by its operation a the normal regulation for the ignition timing or control overriding the injection timing and if necessary, the exhaust valves at the right time be opened.
- the emergency switch possibly triggered an optical or acoustic signal will.
- the emergency switch In a motor vehicle using an internal combustion engine the above device is driven, the emergency switch arranged in the driver's compartment.
- the emergency switch should of course be attached in such a way that it not accidentally and on the other hand not only from Driver, but also operated by a passenger can.
- a four-stroke Otto engine 1 has a cylinder block 2 with cylinders 3 and pistons 4 and a cylinder head 5 in which, in addition to the usual gas exchange inlet and exhaust valves, an additional, for example pneumatically or hydraulically controlled Exhaust valve 7 (Fig. 2) is arranged.
- the cylinder head 5 also contains the camshaft for actuating the gas exchange valves and the schematically illustrated injection and Ignition system 6, which is operated by electronics 8 in normal operation is regulated.
- a separate electronic Regulator 9 is provided, which is operated by an emergency switch 10 activated for example in the dashboard 11 of the vehicle can be and on the one hand the ignition timing regardless of the setting by the electronics 8 in the "early" direction adjusted that the combustion in each cylinder already during the compression cycle, i.e. well before reaching the top dead center of the piston 4, is triggered, and on the other hand the additional at the end of the compression cycle Exhaust valve 7 opens. Due to premature combustion on the piston 4 a restoring combustion pressure, the causes the internal combustion engine to brake quickly. By the opening of the additional exhaust valve 7 towards the end of Compression cycle is avoided that after going through the top dead center a driving pressure force on the piston 4 acts.
- the additional exhaust valve 7 shown in Fig. 2 blocks in the closed state, a channel 12 which is not connected to the cylinder space shown is connected and from which a Channel 13 goes out to the outlet channel, not shown the internal combustion engine 1 or to the turbine of an exhaust gas turbocharger is guided, the one adapted to the braking operation can have a narrow flow cross-section.
- the valve 7 is acted upon by a spring 14 in the closing direction and carries a control piston 15 which is slidable in one Cylinder 16 sits and a pressure chamber 18 with a cover 17 limited by a port 19 a pressure medium can be supplied to open the valve 7.
- the Supply of the pressure medium is controlled by the controller 9.
- the additional outlet valve 7 can be omitted if the Internal combustion engine with a valve train with variable Control times is equipped and the gas exchange exhaust valves can be controlled by the controller 9 so that they are opened at the end of the compression cycle.
- the controller 9 can activate a signal device 20 which when actuating the emergency switch 10, an optical or acoustic signal triggers
- the controller 9 does not need the injection and Ignition system 6 to act, but it can instead have a Line 28 are connected to the electronics 8 and this influence accordingly ..
- combustion occurs triggered during the compression stroke that the Fuel injection accordingly long before reaching the top dead center of the piston.
- an ignition aid e.g. in the form of a spark or glow plug be provided.
- the braking of the internal combustion engine can still do so be accelerated that the dynamic pressure in the exhaust pipe is increased, e.g. through a throttle valve in the exhaust line or with an internal combustion engine an exhaust gas turbocharger, the turbine with a variable Guide vane is provided by adjusting it (see e.g. DE-C 42 32 400).
Abstract
Description
- Fig. 1
- zeigt schematisch die Anwendung der Erfindung auf eine Fahrzeug-Brennkraftmaschine, und
- fig. 2
- ist ein Teilschnitt des Zylinderkopfes.
Claims (13)
- Verfahren zum Abbremsen einer Viertakt-Brennkraftmaschine, insbesondere zum Antrieb eines Fahrzeuges, mit mindestens einem Auslaßventil pro Zylinder,
dadurch gekennzeichnet, daß die Verbrennung in den Zylindern während des Verdichtungstaktes ausgelöst wird, so daß vor Erreichen des oberen Totpunktes der Kolben in den Zylindern ein das Abbremsen der Brennkraftmaschine bewirkender Druckanstieg erfolgt. - Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß gegen Ende des Verdichtungstaktes mindestens ein Auslaßventil pro Zylinder geöffnet wird.
- Verfahren nach Ansprch 1 oder 2, dadurch gekennzeichnet, daß das Auslösen der vorzeitigen Verbrennung durch Fremdzündung während des Verdichtungstaktes erfolgt.
- Verfahren nach einem der Ansprüche 1 3 zum Abbremsen einer Diesel-Brennkraftmaschine, dadurch gekennzeichnet, daß die Kraftstoff-Einspritzung in die Zylinder so lange vor dem oberen Totpunkt der Kolben erfolgt, daß durch die vorzeitige Verbrennung während des Verdichtungstaktes ein abbremsender Druckanstieg in den Brennräumen stattfindet.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß als Auslaßventil ein zusätzliches Ventil vorgesehen wird.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß als Auslaßventil ein Gaswechselventil vorgesehen wird, dessen Steuerzeiten veränderbar sind.
- Vorrichtung zur Durchführung des Verfahrens nach einem oder mehreren der Ansprüche 1 bis 7, gekennzeichnet durcha) eine Einrichtung (9) zur Frühverstellung des Zündzeitpunktes und/oder des Einspritz-Zeitpunktes und gegebenenfalls zum Öffnen mindestens eines Auslaßventils (7) pro Zylinder gegen Ende des Verdichtungstaktes, undb) einen Notfallschalter (10) zum Aktivieren dieser Einrichtung.
- Kraftfahrzeug, das eine willkürlich betätigbare Radbremsanlage (22) aufweist und von einer Brennkraftmaschine (1) mit einer Einrichtung (9) gemäß Anspruch 7 angetrieben ist, dadurch gekennzeichnet, daß der Notfallschalter (10) im Fahrerraum angeordnet ist.
- Kraftfahrzeug nach Anspruch 8, gekennzeichnet durch eine optische oder akustische Signaleinrichtung (20), die bei Betätigung des Notfallschalters (10) ausgelöst wird.
- Kraftfahrzeug nach Anspruch 9, dadurch gekennzeichnet, daß die Einrichtung zum Abbremsen der Brennkraftmaschine mit den Mitteln zur Betätigung der Radbremsanlage (22) gekoppelt ist.
- Kraftfahrzeug nach Anspruch 10, dadurch gekennzeichnet, daß die Radbremseinrichtung (22) gleichzeitig mit der Betätigung des Notfallschalters (10) aktivierbar ist.
- Verfahren zum Abbremsen eines Kraftfahrzeuges nach Anspruch 10, dadurch gekennzeichnet, daß der Zeitpunkt, zu dem die vorzeitige Verbrennung ausgelöst wird, in Abhängigkeit von der Betätigung der Radbremsanlage veränderbar ist.
- Verfahren zum Abbremsen eines Kraftfahrzeuges nach einem der Ansprüche 10 bis 12, das mit einem Antiblockiersystem (26) ausgestattet ist, dadurch gekennzeichnet, daß der Zeitpunkt, zu dem die vorzeitige Verbrennung ausgelöst und/oder das Auslaßventil (7) geöffnet wird, in Abhängigkeit vom Ansprechen der Antiblockiervorrichtung veränderbar ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19614923A DE19614923C2 (de) | 1996-04-16 | 1996-04-16 | Kraftfahrzeug mit einer Zusatzbremseinrichtung und Verfahren zum Notfall- Abbremsen eines derartigen Kraftfahrzeuges |
DE19614923 | 1996-04-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0822321A1 true EP0822321A1 (de) | 1998-02-04 |
EP0822321B1 EP0822321B1 (de) | 2002-09-18 |
Family
ID=7791380
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97102964A Expired - Lifetime EP0822321B1 (de) | 1996-04-16 | 1997-02-24 | Verfahren zum Abbremsen einer Viertakt-Brennkraftmaschine, insbesondere für den Antrieb eines Fahrzeuges |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0822321B1 (de) |
DE (2) | DE19614923C2 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19717068C1 (de) * | 1997-04-23 | 1998-06-18 | Daimler Benz Ag | Brennkraftmaschine |
DE19802626C1 (de) * | 1998-01-24 | 1998-12-17 | Daimler Benz Ag | Verfahren zum Betreiben einer Brennkraftmaschine |
FR2795133B1 (fr) * | 1999-06-18 | 2002-07-12 | Renault | Procede de commande d'un moteur a combustion en vue de l'obtention d'un effet de frein moteur |
DE19951592B4 (de) * | 1999-10-27 | 2006-05-18 | Daimlerchrysler Ag | Vorrichtung zur Regelung der Bremsleistung einer Brennkraftmaschine |
US6336447B1 (en) * | 2000-05-08 | 2002-01-08 | Mack Trucks, Inc. | Method and apparatus for compression brake enhancement using fuel and an intercooler bypass |
DE102010031095B4 (de) * | 2010-07-08 | 2013-05-16 | Robert Bosch Gmbh | Verfahren und Steuergerät zum Betreiben eines Verbrennungsmotors |
US20160123242A1 (en) * | 2013-05-29 | 2016-05-05 | International Engine Intellectual Property Company, Llc | Engine Braking |
GB2613385A (en) * | 2021-12-02 | 2023-06-07 | Cummins Inc | Engine braking with fuel injection for internal combustion engines |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2178152A (en) * | 1938-03-14 | 1939-10-31 | Clinton L Walker | Brake cycle for internal combustion engines |
US3023870A (en) * | 1960-02-15 | 1962-03-06 | Jaime K Udelman | Auxiliary brake for vehicles employing ignition advance feature and exhaust valve opening advance feature |
EP0320536A1 (de) * | 1987-12-15 | 1989-06-21 | Van Doorne's Bedrijfswagenfabriek DAF B.V. | Kompressionsmotorbremse |
DE4125831A1 (de) * | 1991-08-03 | 1992-10-15 | Daimler Benz Ag | Motorbremse |
US5634447A (en) * | 1996-03-07 | 1997-06-03 | Navistar International Transportation Corp. | Electronic fuel injection augmentation of an engine compression brake |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3332664A1 (de) * | 1982-12-20 | 1984-01-19 | Erler Karl Heinz | Not-, halt-, warn- und sicherheitsvorrichtung fuer kraftfahrzeuge mit verbrennungsmotor |
DE3319025A1 (de) * | 1983-05-26 | 1984-11-29 | Robert Bosch Gmbh, 7000 Stuttgart | Verfahren und vorrichtung zur begrenzung der drehzahl von brennkraftmaschinen |
DE3428626A1 (de) * | 1984-08-03 | 1986-02-13 | Daimler-Benz Ag, 7000 Stuttgart | Viertakt-brennkraftmaschine |
DE3728515A1 (de) * | 1987-08-26 | 1989-03-16 | Herbert Haedrich | Notfall-bremsanordnung fuer lkw oder dergleichen fahrzeug |
DE3734489A1 (de) * | 1987-08-26 | 1989-04-20 | Herbert Haedrich | Notfall-bremsanordnung fuer lkw oder dergleichen fahrzeug |
DE3900739A1 (de) * | 1989-01-12 | 1990-07-19 | Man Nutzfahrzeuge Ag | Verfahren zur steigerung der motorbremsleistung bei viertakt-hubkolben-brennkraftmaschinen |
DE4425956C2 (de) * | 1994-07-21 | 1997-06-05 | Daimler Benz Ag | Verfahren und Vorrichtung zum Betreiben eines Dieselmotors |
-
1996
- 1996-04-16 DE DE19614923A patent/DE19614923C2/de not_active Expired - Fee Related
-
1997
- 1997-02-24 EP EP97102964A patent/EP0822321B1/de not_active Expired - Lifetime
- 1997-02-24 DE DE59708241T patent/DE59708241D1/de not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2178152A (en) * | 1938-03-14 | 1939-10-31 | Clinton L Walker | Brake cycle for internal combustion engines |
US3023870A (en) * | 1960-02-15 | 1962-03-06 | Jaime K Udelman | Auxiliary brake for vehicles employing ignition advance feature and exhaust valve opening advance feature |
EP0320536A1 (de) * | 1987-12-15 | 1989-06-21 | Van Doorne's Bedrijfswagenfabriek DAF B.V. | Kompressionsmotorbremse |
DE4125831A1 (de) * | 1991-08-03 | 1992-10-15 | Daimler Benz Ag | Motorbremse |
US5634447A (en) * | 1996-03-07 | 1997-06-03 | Navistar International Transportation Corp. | Electronic fuel injection augmentation of an engine compression brake |
Also Published As
Publication number | Publication date |
---|---|
DE19614923A1 (de) | 1997-10-23 |
DE59708241D1 (de) | 2002-10-24 |
EP0822321B1 (de) | 2002-09-18 |
DE19614923C2 (de) | 1999-05-06 |
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