EP1007830A1 - Internal combustion engine and its operating mode - Google Patents
Internal combustion engine and its operating modeInfo
- Publication number
- EP1007830A1 EP1007830A1 EP98941131A EP98941131A EP1007830A1 EP 1007830 A1 EP1007830 A1 EP 1007830A1 EP 98941131 A EP98941131 A EP 98941131A EP 98941131 A EP98941131 A EP 98941131A EP 1007830 A1 EP1007830 A1 EP 1007830A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- internal combustion
- combustion engine
- piston
- 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.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G3/00—Combustion-product positive-displacement engine plants
-
- 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
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
Definitions
- the invention relates to a working method of an internal combustion engine with at least one mutually movable and interacting piston and cylinder, wherein preferably the piston drives a crankshaft by means of power transmission means, and the piston in the cylinder continuously has a bottom and an upper dead center position, forming a largest and a smallest Occupies the interior of the cylinder and the cylinder space can be temporarily closed, for example by controlled valves.
- the invention comprises an internal combustion engine with at least one mutually movable and interacting piston and cylinder, wherein a crankshaft can preferably be driven by pistons by means of a force transmission means, and the piston in the cylinder continuously has a lower and an upper dead center position, forming a largest and a smallest one Occupies the interior of the cylinder and the interior of the cylinder, for example by means of controlled valves, can at times be closed off from a gas supply device and an exhaust gas discharge device and, if appropriate, has introduction and / or ignition means for a working fluid or fuel mixture.
- the working method of known internal combustion engines with pistons moving in a cylinder essentially comprises a charging cycle with the introduction of air or a combustible gas mixture into the cylinder interior and a compression thereof by the piston moved into the top dead center position, after which combustion of working fluid takes place in one working cycle
- the temperature and pressure increase and thereby the piston is moved to the bottom dead center position, whereupon the burned gases or exhaust gases are discharged from the cylinder interior in one exhaust stroke.
- the sequence of the gas supply, the compression and the exhaust gas discharge is controlled by movable closing means, in particular valves, in the area of the so-called cylinder head as a function of the crankshaft rotation.
- This method of operation can be achieved by indenting air or combustible gas mixture in the cylinder interior, for example by means of a turbocharger or compressor, to higher specific outputs, because the filling of the cylinders with combustible medium can be increased, especially at high engine speeds.
- the invention seeks to remedy this and aims to create a working method of an internal combustion engine with which the energy use of the working fluid during combustion can be significantly increased.
- Another object of the invention is to provide an internal combustion engine with which a significantly improved efficiency is achieved.
- This goal is achieved in a generic method in that, in a charging process, compressed, gaseous medium is introduced into the cylinder interior formed in the region of the top dead center position of the piston when at least one inlet closing means is open
- the interior of the cylinder is closed and the compressed gaseous medium is heated recuperatively, whereupon in a work cycle in the gaseous medium which has been brought to an elevated temperature in the cylinder space, combustion takes place with an increase in temperature and pressure, and the piston with a decrease in temperature and pressure of the burned medium to the bottom dead center position is pressed, after which, in an exhaust stroke, at least one outlet closing means is opened, and the combustion or exhaust gas is discharged from the cylinder interior with the recuperative removal of thermal energy by the piston moved to the top dead center position.
- the combustion gas can be expanded to approximately the ambient pressure, thereby making it possible to improve the use of energy.
- the heat or energy remaining in the combustion gas is further reduced according to the invention, on the other hand, by giving off heat to a recuperator, so that the exhaust gas can be brought to a much lower energy level and thus the energy balance of the process by introducing energy stored in the recuperator into the fresh gas is improved. It is thereby achieved that the residual energy not usable for the process in the exhaust gas ultimately discharged is significantly reduced and that the working method has a significantly increased efficiency in relation to the energy used or introduced by means of the working fluid or gas mixture.
- the pressure is reduced to substantially the ambient pressure when the piston reaches the bottom dead center position.
- diesel, petrol or similar fuels are used, it can be considered favorable if, during the charging process, oxygen-containing, gaseous medium or oxygen-containing gas, in particular combustion air, is pressed into the cylinder space and thereby or recuperatively heated, and then in the work cycle Working fluid or fuel is introduced into the cylinder space and is preferably brought to combustion by self-ignition or, if appropriate, spark ignition.
- Working fluid or fuel is introduced into the cylinder space and is preferably brought to combustion by self-ignition or, if appropriate, spark ignition.
- flammable gaseous medium in particular a gasoline or the like and / or gas-air mixture
- this fuel gas by spark ignition or self-ignition in the working cycle is brought to combustion
- fuels for, for example, gasoline, diesel or gas engines with efficiencies which are substantially improved according to the invention.
- the gaseous medium intended for the charging process is compressed or compressed isothermally, introduced into the cylinder interior and isochorously heated therein, after which the combustion cycle causes the work cycle a further isochoric, possibly isochoric and / or isobaric temperature increase with subsequent isentropic expansion of the combustion gas caused by the piston movement and when the same is being extracted from the cylinder interior during the exhaust cycle, the sensible heat is at least partially isobarically extracted from the exhaust gas.
- a desired high thermal efficiency in the combustion of the working fluid or gas can only be achieved if this cycle sequence or sequence of steps is observed.
- recuperative heating of the gaseous medium is carried out in the interior of the cylinder.
- An internal combustion engine of the type mentioned is determined according to the object of the invention in that it has a recuperator, which of the supplied gas and the combustion gas or exhaust gas can be flowed through alternately.
- recuperator further reduces the residual heat of the exhaust gas and this energy can be fed back into the working process, which leads to a substantial increase in the thermal efficiency of the internal combustion engine.
- recuperator is arranged in the cylinder interior essentially filling the cross section.
- recuperator is arranged to be movable in the cylinder space, in particular displaceable in the cylinder axis direction.
- An advantageous high proportion of unburned gasoline and the like or gas-air mixture or the combustion air can thus be brought to a desired high temperature or the recuperative heat exchange can be optimized.
- the movable recuperator holder and / or a recuperator part is additionally designed as an inlet and / or outlet closure means.
- recuperator is made of metal and / or ceramic.
- the recuperator has a catalytic coating.
- this reduces the proportion of carbon monoxide in the exhaust gas, on the other hand, however, the thermal energy formed in the catalysis is used for heating the gaseous medium introduced into the cylinder interior and the thermal efficiency of the internal combustion engine is improved.
- a pressure increasing device is arranged in the feed area for the gaseous medium. It is particularly advantageous for constant-load operation if the pressure-increasing device can be driven by the crankshaft or the working piston by means of an operative connection. With regard to the overall efficiency, however, it can also be favorable if the pressure increasing device can be driven at least partially by external energy. It is also possible, for example in the case of a vehicle, to obtain the external energy from the braking process.
- a pressure accumulator for the gaseous medium which can preferably be used by means of a control device, is arranged in the area of the pressure increasing device or between the latter and the inlet closing means in the gas supply device, and this pressure accumulator possibly independent of the operation of the internal combustion engine by a third-party drive via mechanical coupling means to the pressure increasing device through this is rechargeable.
- Fig. 1 shows schematically the structure of a device according to the invention
- FIG. 1 shows a cylinder 1 in which a piston 2 is movable, the piston 2 being operatively connected to a crankshaft 8.
- Combustion air V or combustible gas mixture can be fed to a pressure increasing device 5, from which this medium is made available to a control device 6 with preferably a connected pressure accumulator 7.
- This pressure-increasing device 5, which is designed to be connectable to the crankshaft 8 or an external drive 9 by means of a coupling 81, 91 and / or the pressure accumulator 7, provides the gaseous medium M in a gas supply device 11 to the cylinder 1 via the control device 6.
- In cylinder 1 there is essentially a cross-section filling in the area of the cylinder head Recuperator 3 arranged.
- Combustion or exhaust gas A can be discharged from the cylinder interior by an exhaust gas discharge device 13.
- FIG. 2 schematically shows a charging process of an internal combustion engine according to the invention, an isothermally compressed gaseous medium M being introduced into the interior of a cylinder 1 by a gas supply device 11 when an inlet closure means 12 is open.
- a recuperator 3 with increased temperature is located approximately on a piston 2, which is located in the area of its upper dead center position with the release of an upper cylinder interior.
- the recuperator 3 After closing the inlet closing means 12 shown in FIG. 3, the recuperator 3 is brought into the upper cylinder interior by means of a displacement device 31, the gaseous medium flowing through the recuperator 3 and being heated isochorously.
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)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0141697A AT410699B (en) | 1997-08-25 | 1997-08-25 | WORKING METHOD OF AN INTERNAL COMBUSTION ENGINE AND INTERNAL COMBUSTION ENGINE |
AT141697 | 1997-08-25 | ||
PCT/AT1998/000199 WO1999010637A1 (en) | 1997-08-25 | 1998-08-25 | Internal combustion engine and its operating mode |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1007830A1 true EP1007830A1 (en) | 2000-06-14 |
Family
ID=3513430
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98941131A Withdrawn EP1007830A1 (en) | 1997-08-25 | 1998-08-25 | Internal combustion engine and its operating mode |
Country Status (5)
Country | Link |
---|---|
US (1) | US6340021B1 (en) |
EP (1) | EP1007830A1 (en) |
JP (1) | JP2001514354A (en) |
AT (1) | AT410699B (en) |
WO (1) | WO1999010637A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005044381A1 (en) * | 2005-09-16 | 2007-03-29 | Mittermaier, Franz Xaver | Internal combustion engine operation method for vehicle, involves injecting or igniting formed fuel-air mixture or fuel-oxygen into cylinder through nozzle, without further compression |
US20070256661A1 (en) * | 2006-05-05 | 2007-11-08 | Smith Andrew F | Piston With Vaporizing Ring |
US20100269502A1 (en) * | 2007-01-22 | 2010-10-28 | Edward Lawrence Warren | External combustion engine |
DE102012020893B4 (en) * | 2012-10-24 | 2018-07-12 | Peter Kreuter | A method for operating a supercharged, longitudinally-flushed two-stroke internal combustion engine and charged, longitudinally-flushed two-stroke internal combustion engine and recuperator |
CN104088695B (en) * | 2014-07-04 | 2015-09-30 | 郭远军 | A kind of thermal powerplant and work method thereof |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH282830A (en) * | 1948-02-26 | 1952-05-15 | Shell Refining & Marketing Co | Internal combustion piston engine. |
DE2035605A1 (en) * | 1969-07-25 | 1971-02-11 | The Treadwell Corp , New York, N Y (V St A) | Internal combustion engine |
GB2033961A (en) * | 1978-10-14 | 1980-05-29 | Lucas Industries Ltd | Preheating Air or Fuel/Air Mixtures Supplied to Internal Combustion Engines |
US4280468A (en) * | 1980-02-11 | 1981-07-28 | Millman Mitchell W | Regenerative reciprocating open cycle internal combustion engine |
WO1981002912A1 (en) * | 1980-03-31 | 1981-10-15 | Caterpillar Tractor Co | High thermal efficiency power plant and operating method therefor |
US4341070A (en) | 1980-03-31 | 1982-07-27 | Caterpillar Tractor Co. | High thermal efficiency power plant and operating method therefor |
FR2587063A1 (en) * | 1985-09-12 | 1987-03-13 | Alphonse J | Regeneration device for heat engines with reciprocating manoeuvres |
US4928658A (en) * | 1985-10-02 | 1990-05-29 | Ferrenberg Allan J | Regenerative internal combustion engine |
US4790284A (en) * | 1985-10-02 | 1988-12-13 | Regenic Corporation | Regenerative internal combustion engine |
US5632255A (en) * | 1994-05-27 | 1997-05-27 | Ferrenberg; Allan J. | Regenerated engine with an improved heating stroke |
US5465702A (en) * | 1994-05-27 | 1995-11-14 | Ferrenberg; Allan J. | Regenerated engine with improved heating and cooling strokes |
US6116222A (en) * | 1999-07-16 | 2000-09-12 | Warren; Edward Lawrence | Two stroke regenerative engine |
-
1997
- 1997-08-25 AT AT0141697A patent/AT410699B/en not_active IP Right Cessation
-
1998
- 1998-08-25 EP EP98941131A patent/EP1007830A1/en not_active Withdrawn
- 1998-08-25 US US09/485,674 patent/US6340021B1/en not_active Expired - Fee Related
- 1998-08-25 WO PCT/AT1998/000199 patent/WO1999010637A1/en not_active Application Discontinuation
- 1998-08-25 JP JP2000507927A patent/JP2001514354A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO9910637A1 * |
Also Published As
Publication number | Publication date |
---|---|
AT410699B (en) | 2003-06-25 |
US6340021B1 (en) | 2002-01-22 |
ATA141697A (en) | 2002-11-15 |
WO1999010637A1 (en) | 1999-03-04 |
JP2001514354A (en) | 2001-09-11 |
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