EP1725756A1 - Procede pour faire fonctionner un moteur a combustion interne lors du fonctionnement du frein moteur - Google Patents
Procede pour faire fonctionner un moteur a combustion interne lors du fonctionnement du frein moteurInfo
- Publication number
- EP1725756A1 EP1725756A1 EP05715708A EP05715708A EP1725756A1 EP 1725756 A1 EP1725756 A1 EP 1725756A1 EP 05715708 A EP05715708 A EP 05715708A EP 05715708 A EP05715708 A EP 05715708A EP 1725756 A1 EP1725756 A1 EP 1725756A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- internal combustion
- combustion engine
- intake
- valves
- cylinder
- 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.)
- Withdrawn
Links
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
- 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
- F02D41/0002—Controlling intake air
- F02D41/0005—Controlling intake air during deceleration
-
- 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
- F02D41/0002—Controlling intake air
- F02D2041/001—Controlling intake air for engines with variable valve actuation
-
- 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
- F02D41/0002—Controlling intake air
- F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
-
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/12—Introducing corrections for particular operating conditions for deceleration
- F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Definitions
- the invention relates to a method for operating an internal combustion engine of a motor vehicle in engine braking operation according to the preamble of claim 1.
- each internal combustion engine of a motor vehicle achieves. a certain braking effect due to the charge exchange work to be performed.
- internal combustion engines with variably adjustable valve trains freely adjustable control times
- a variably controllable braking torque of a higher degree In DE 195 46 652 A1. describes a method for reducing the driving speed of a vehicle equipped with a collision avoidance system, in which a distance-dependent braking of the vehicle takes place in that at least one cylinder in the internal combustion engine equipped with variable valve train is switched to compressor operation.
- the invention has for its object to provide a method for operating an internal combustion engine with a charger, by means of which an adjustable increased engine braking effect is achieved.
- a spontaneous response behavior of the internal combustion engine, in particular in overrun mode is to be ensured.
- Controlled compression (control of the exhaust valves) of an adjustable air mass (control of the intake valves) in the combustion chamber of at least one deactivated (or non-fired, i.e. at least one cylinder combustion chamber not supplied with fuel) cylinder can generate an increased, adjustable braking torque for braking the vehicle.
- the generation of a pressure pulse which is generated due to the targeted actuation of the exhaust valves for the spontaneous release of the previously compressed air mass (depending on the actuation of the intake valves), and the targeted application of a load device with this pressure impulse to a spontaneous response behavior of the internal combustion engine at any time be guaranteed. Due to the pressure pulse generated in each working cycle, the turbine of the charger can always be kept at a significantly increased speed.
- the object of the invention successfully avoids the slow start-up behavior of conventional internal combustion engines with a charger, the turbines of which have to be accelerated starting from a very low speed.
- all intake valves of all cylinders (preferably all cylinders) integrated to generate the braking effect are actuated in such a way that the greatest possible air mass is sucked into the cylinder combustion chamber (this roughly corresponds to actuation of the intake valves according to one of the following) Full load operation) and the exhaust valves of all cylinders are controlled in such a way that the compressed air mass is only released shortly before top dead center of the piston (TDC).
- the desired braking torque is advantageously set by the type of control of the valves, alternatively or additionally, however, by switching between different engine operating modes (2-stroke operation, 4-stroke operation or the like) and / or by the variable number for the braking operation cylinder used.
- the setting of the braking torque by controlling the valves can be realized in that, in a first embodiment, the intake valves are variably controlled according to a full load operation (intake of the largest possible air mass) and the exhaust valves for setting the degree of compression of the air mass provided by the intake valves. In a second embodiment, it is provided that the exhaust valves open as late as possible before TDC to control the intake valves variably to the setting position of the brake pressure. Finally, a third possible embodiment provides for variable control of both intake valves and exhaust valves for setting a desired braking torque.
- the non-fired cylinders can be switched back and forth, for example between a two-stroke operation and a four-stroke operation, and / or the number of non-fired cylinders can be varied.
- There in four-stroke mode compression and expansion take place between two successive brake cycles and these do not significantly contribute to the braking effect, an optimal combination of the braking effect to be achieved and the high speed of the charger in two-stroke mode can be achieved.
- Figure 1 the schematic representation of an internal combustion engine with electromagnetic valve train and charger
- FIG. 2 a diagram with curves for the control of intake and exhaust valves of a cylinder in four-stroke operation
- FIG. 3a a diagram - illustrating the course of the valve strokes of intake and exhaust valves when actuated according to the inventive method in four-cycle operation and the resulting exhaust gas dynamics
- Figure 4a a diagram with the course of the valve strokes of intake and exhaust valves when actuated according to the inventive method in two-stroke operation and the resulting exhaust gas dynamics
- FIG. 1 shows an internal combustion engine 2 with an electromagnetic valve drive 4 and a control device 6 for targeted control of the electromagnetic valve drive 4.
- the internal combustion engine 2 is connected to a charger device 8 via an exhaust pipe 10 and on the intake side via an intake pipe 20.
- the charger device 8 can be driven via its turbine wheel 8a by the exhaust gas flow generated by the internal combustion engine 2.
- the turbine wheel 8a of the supercharger device 8 is connected to a compressor wheel 8b via a shaft 8c, so that fresh air is sucked in from the outside and compressed in the intake tract of the internal combustion engine 2 by the drive of the turbine wheel 8a and the drive of the compressor wheel 8b connected to it.
- air filling according to full load can be admitted into the combustion chamber for compression during normal operation, for example and through the targeted actuation of the exhaust valves, for example by opening the exhaust valves shortly before top dead center for the piston, compressing the air mass available in the combustion chamber for compression (and thus for generating the braking torque) to the greatest possible extent, thus achieving a maximum braking torque ,
- the compressed air mass which was required for the build-up of the braking torque, is released in a targeted manner such that a pressure pulse is passed via the exhaust tract to the supercharger device 8 and the supercharger device 8 is thus already accelerated to an increased speed during the engine braking process.
- a significantly improved response behavior of the internal combustion engine can be realized, in which the increase in performance of the charger device 8 takes effect at a considerably earlier point in time.
- the method according to the invention can be used both in two-stroke mode and in four-stroke mode or in operating modes with other clock rates.
- the method according to the invention finds a preferred application in connection with a valve actuation of the non-fired cylinders according to a two-stroke operation.
- each compression process can be converted into an additional braking torque and a pressure pulse that can be forwarded to the charger 8.
- a recirculation valve 22 arranged in the intake line 20 is preferably used.
- This air recirculation valve can be controlled accordingly via an engine control device MSE, so that the pressure in the intake tract can be regulated while maintaining the supercharger speed.
- a boost pressure relief valve 12 in the exhaust line 12 or in the Charger device 8 itself is present, which can also be controlled via the engine control device MSE.
- the method according to the invention is independent of special operating principles of variable valve control - the only essential thing is that the valve control times of intake and exhaust valves are to be controlled variably.
- the method is preferably used in electromagnetic valve trains with stroke or rotary actuators.
- this speed can be increased by using the method according to the invention in four-cycle operation to supercharger speeds that range from 60% to 70% of the speed In two-stroke operation, significantly higher supercharger speeds can be achieved in engine braking.
- Figure 2 illustrates schematically the control of intake and exhaust valves of a cylinder in four-stroke operation.
- the continuous curves EV are assigned to the intake valves and the dash-dotted curves AV to the exhaust valves.
- the upper diagram shows the control behavior and the path of the controlled intake and exhaust valves in fired operation for an EVT engine (engine with electromagnetic valve train).
- the lower diagram shows the control behavior or the course of the controlled intake and exhaust valves in an at least partially unfired operation of an EVT engine (braking operation), the setting of the engine braking effect being able to be achieved by changing the control of the intake and exhaust valves.
- the intake valves for the.
- the braking effect of the cylinder used is controlled in such a way that either the cylinder combustion chamber is filled with an increased air mass (lengthening of the valve opening time) and / or the opening of the intake valves is delayed, so that an additional braking torque is generated.
- the double arrows in the front and rear flanks of the curves are only intended to indicate that the opening and closing of the inlet and outlet valves can be shifted in time both in front of and behind by the control according to the invention.
- the front flank for initiating the opening process of each intake valve of a four-stroke cylinder has been retained, so that the air filling of the combustion chamber is initiated starting from the top dead center of the piston.
- the trailing edge of the curve which represents the initiation of the closing of the intake valves, has been delayed so that the air filling can take place over an extended period of time. This means that a larger volume of air is available for compression.
- the increased air volume which is compressed in connection with the latest possible opening of the exhaust valves, can generate a significantly increased braking torque in overrun mode.
- FIGS. 3a, 3b; 4a, 4b illustrate the results of the method according to the invention with appropriate activation of the intake and exhaust valves in engine brake operation.
- FIGS. 3a and 4a show the valve lift or the actuation of intake and exhaust valves as well as the exhaust gas dynamics resulting therefrom or the pressure pulse generated thereby.
- FIGS. 3b and 4b each illustrate the pressure curve built up by the compression of the air masses in the unfired cylinders in a pV diagram. Because of the Assignment of individual times indicated by arrows shows that the desired pressure pulse is generated in the exhaust line 10 shortly after the opening of the exhaust valves at time T1 or shortly before the maximum opening stroke of the exhaust valves at time T3 at time T2.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Supercharger (AREA)
Abstract
L'invention concerne un procédé pour faire fonctionner le moteur à combustion interne d'un véhicule, lors du fonctionnement du frein moteur. Selon l'invention, le moteur à combustion interne peut fonctionner avec au moins un cylindre non mis à feu et le moteur à combustion interne comprend des soupapes d'échappement pouvant être commandées de manière variable pour des soupapes d'entrée et de sortie d'un cylindre et un dispositif de chargement conçu pour augmenter la pression dans l'aile d'entrée du cylindre. L'objectif de l'invention est d'améliorer le comportement du frein moteur et la réponse du dispositif de charge d'un véhicule à moteur. A cet effet, les soupapes d'entrée et de sortie sont commandées de manière à mettre en place un couple de freinage spécifique qui peut être introduit par compression de la masse d'air à l'intérieur de chaque cylindre non mis à feu.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004011652A DE102004011652B4 (de) | 2004-03-10 | 2004-03-10 | Verfahren zum Betreiben einer Brennkraftmaschine im Motorbremsbetrieb |
PCT/EP2005/002256 WO2005088105A1 (fr) | 2004-03-10 | 2005-03-03 | Procede pour faire fonctionner un moteur a combustion interne lors du fonctionnement du frein moteur |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1725756A1 true EP1725756A1 (fr) | 2006-11-29 |
Family
ID=34961456
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05715708A Withdrawn EP1725756A1 (fr) | 2004-03-10 | 2005-03-03 | Procede pour faire fonctionner un moteur a combustion interne lors du fonctionnement du frein moteur |
Country Status (4)
Country | Link |
---|---|
US (1) | US7308886B2 (fr) |
EP (1) | EP1725756A1 (fr) |
DE (1) | DE102004011652B4 (fr) |
WO (1) | WO2005088105A1 (fr) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0203490D0 (en) * | 2002-02-14 | 2002-04-03 | Holset Engineering Co | Exhaust brake control system |
WO2008076013A1 (fr) * | 2006-12-20 | 2008-06-26 | Volvo Lastvagnar Ab | Frein moteur pour véhicule |
US8214113B2 (en) * | 2008-06-30 | 2012-07-03 | Caterpillar Inc. | Retarding system that retards motion of power source |
US8892330B2 (en) * | 2011-10-17 | 2014-11-18 | Tula Technology, Inc. | Hybrid vehicle with cylinder deactivation |
JP5724296B2 (ja) * | 2010-10-28 | 2015-05-27 | いすゞ自動車株式会社 | エンジンシステム |
JP5644949B2 (ja) * | 2011-09-12 | 2014-12-24 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
BR112014006832A2 (pt) * | 2011-09-22 | 2017-04-04 | A Sumra Hajibhai | método e aparelho para operar um motor de veículo |
US9790867B2 (en) | 2012-07-31 | 2017-10-17 | Tula Technology, Inc. | Deceleration cylinder cut-off |
US10408140B2 (en) | 2012-07-31 | 2019-09-10 | Tula Technology, Inc. | Engine control in fuel and/or cylinder cut off modes based on intake manifold pressure |
US10167799B2 (en) | 2012-07-31 | 2019-01-01 | Tula Technology, Inc. | Deceleration cylinder cut-off in a hybrid vehicle |
WO2014022313A1 (fr) | 2012-07-31 | 2014-02-06 | Tula Technology, Inc. | Dispositif de commande de freinage moteur |
DE202014011443U1 (de) * | 2013-12-24 | 2020-09-15 | Marelli Europe S.P.A. | Vorrichtung zur Steuerung eines Verbrennungsmotors, der mittels eines Turboladers aufgeladen wird |
ITBO20130719A1 (it) * | 2013-12-24 | 2015-06-25 | Magneti Marelli Spa | Metodo di controllo di un motore a combustione interna turbocompresso mediante un turbocompressore durante una fase di rilascio e/o durante una fase di cambio marcia |
DE102018128038A1 (de) | 2018-11-09 | 2020-05-14 | Bayerische Motoren Werke Aktiengesellschaft | Motorbremsbetrieb einer Brennkraftmaschine |
JP7047731B2 (ja) * | 2018-12-04 | 2022-04-05 | トヨタ自動車株式会社 | 内燃機関システム |
US10927780B2 (en) | 2019-04-08 | 2021-02-23 | Tula Technology, Inc. | Adaptation of skip fire calibration to vehicle weight |
US11339728B1 (en) * | 2020-12-08 | 2022-05-24 | Ford Global Technologies, Llc | Methods and systems for engine braking with reduced noise, vibration, and harshness |
GB2610425B (en) * | 2021-09-06 | 2023-10-04 | Dolphin N2 Ltd | Split cycle internal combustion engine and methods of operating a split cycle internal combustion engine |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3234923A (en) * | 1962-06-18 | 1966-02-15 | Caterpillar Tractor Co | Method and braking system for internal combustion engines |
US5117790A (en) * | 1991-02-19 | 1992-06-02 | Caterpillar Inc. | Engine operation using fully flexible valve and injection events |
US5271229A (en) * | 1992-06-01 | 1993-12-21 | Caterpillar Inc. | Method and apparatus to improve a turbocharged engine transient response |
DE4236009B4 (de) * | 1992-10-24 | 2007-08-02 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Steuern des Luftdurchsatzes durch einen Verbrennungsmotor im Schiebebetrieb |
US5437156A (en) * | 1993-11-16 | 1995-08-01 | Jacobs Brake Technology Corporation | Apparatus for selectively lowering intake manifold pressure of turbocharged engine during operation of associated compression release engine brake |
US5813231A (en) * | 1994-07-29 | 1998-09-29 | Caterpillar Inc. | Engine compression braking apparatus utilizing a variable geometry turbocharger |
DE19546652A1 (de) * | 1995-12-14 | 1997-06-19 | Fev Motorentech Gmbh & Co Kg | Verfahren zur Reduzierung der Fahrgeschwindigkeit eines mit einem Kollisionsvermeidungssystem ausgerüsteten Kraftfahrzeuges |
DE19851028C2 (de) * | 1998-11-05 | 2001-06-13 | Daimler Chrysler Ag | Verfahren zum Betreiben einer aufgeladenen Brennkraftmaschine |
DE10016421A1 (de) * | 2000-04-01 | 2001-10-04 | Daimler Chrysler Ag | Verfahren zum Betrieb einer Brennkraftmaschine mit Motorbremse |
DE10122775A1 (de) * | 2000-05-18 | 2001-11-22 | Ford Global Tech Inc | Hybrider Motor und Verfahren zu dessen Taktsteuerung |
KR20020095384A (ko) * | 2001-06-14 | 2002-12-26 | 현대자동차주식회사 | 내연기관의 휴지장치 및 그 제어방법 |
DE10143330A1 (de) * | 2001-09-05 | 2003-03-20 | Bosch Gmbh Robert | Brennkraftmaschine mit einer elektrohydraulischen Ventilsteuervorrichtung |
US6772742B2 (en) * | 2002-03-01 | 2004-08-10 | International Engine Intellectual Property Company, Llc | Method and apparatus for flexibly regulating internal combustion engine valve flow |
-
2004
- 2004-03-10 DE DE102004011652A patent/DE102004011652B4/de not_active Expired - Lifetime
-
2005
- 2005-03-03 WO PCT/EP2005/002256 patent/WO2005088105A1/fr active Application Filing
- 2005-03-03 EP EP05715708A patent/EP1725756A1/fr not_active Withdrawn
-
2006
- 2006-09-11 US US11/518,283 patent/US7308886B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2005088105A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102004011652B4 (de) | 2006-09-21 |
WO2005088105A1 (fr) | 2005-09-22 |
US7308886B2 (en) | 2007-12-18 |
US20070062487A1 (en) | 2007-03-22 |
DE102004011652A1 (de) | 2005-10-06 |
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