Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
  • F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
  • F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
  • F02M31/135—Fuel-air mixture
• • 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
  • F02B1/00—Engines characterised by fuel-air mixture compression
  • F02B1/12—Engines characterised by fuel-air mixture compression with compression ignition
• • 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
  • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
  • F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
  • F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
  • F02B23/104—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder the injector being placed on a side position of the cylinder
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
  • F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
  • F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
• • 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
  • F02B75/12—Other methods of operation
  • F02B2075/125—Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber
• • 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
  • F02B3/00—Engines characterised by air compression and subsequent fuel addition
  • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
• • 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
  • F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
• • 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
  • Y02T10/12—Improving ICE efficiencies

Definitions

• the invention relates to an internal combustion engine according to the preamble of claim 1.
• an internal combustion engine is known with a reciprocating piston, in the reciprocating piston base of which a trough-shaped heat pipe (heat pipe) is installed for the purpose that an axially variably delimited by the reciprocating combustion chamber for the purpose of better gasification and combustion of fuel deliberately high temperature, which is, however, only slightly exceeded.
• a heat pipe built into the cylinder head, which can be heated electrically by means of an electrical resistor in the form of a coil.
• the electric heater has the advantage that, for example, the first injection
• Heat pipe has an elevated temperature and that the fuel to be injected thereby is at least partially vaporizable and therefore more combustible.
• this heat pipe can also be used as a starting aid for the internal combustion engine.
• the embodiment with the trough-shaped The heat pipe on the reciprocating piston has no electrical heating and only becomes effective when heated by means of a burning fuel-air mixture.
• the heat pipe carried by the reciprocating piston is not a starting aid.
• Another internal combustion engine is known from the document DE 27 15 943 AI.
• This has an ignition chamber that communicates with a so-called main combustion chamber, the wall of which is partly designed as a heat pipe and is equipped, for example, with an electrical resistance heater to promote the combustion of fuel.
• a further ignition chamber is known from US 45 86 075 A, which is tempered like a heat pipe and has electrically heated ignition aids.
• An injection nozzle for either diesel fuel or petrol fuel opens into the ignition chamber. If the ignition chamber is used for petrol, the ignition chamber is equipped with a spark plug. It can be considered a disadvantage that the communication of the ignition chamber with the main combustion chamber through narrow channels is burdened with flow resistances and corresponding energy losses. These energy losses cause fuel consumption. Therefore, an internal combustion engine equipped with direct fuel injection is often preferred.
• the internal combustion engine with the characterizing features of claim 1 has the advantage that before
• Direct injection of fuel into the selected cylinder heats a surface of the reciprocating piston on the combustion chamber to a temperature such that at least a portion of the fuel that hits the surface evaporates and mixes with air, thereby becoming electrically ignitable.
• the characterizing features of claim 2 indicate an exemplary embodiment which can be produced, for example, using electrical resistance wire.
• the characterizing features of claim 5 result in the advantage that low-loss inductive transmission of electrical energy to the ohmic resistor is possible.
• the characterizing features of claim 7 result in an alignment of the elements involved that is favorable for energy transmission.
• the characterizing features of claim 8 improve the concentration of magnetic flux lines in the region of the movable secondary winding, as a result of which the efficiency of the electrical energy transmission increases.
• FIG. 1 shows a basic diagram with a stationary primary winding and a movable secondary winding and an ohmic resistor assigned to the secondary winding
• Figure 2 shows a spatial arrangement on a reciprocating piston in accordance with the principle of Figure 1 and Figure 3 shows another embodiment and Figure 4 shows another principle.
• FIG. 1 a section of the internal combustion engine 2 according to the invention, which here is, for example, an Otto engine, is shown schematically.
• a cylinder 3, a reciprocating piston 4, a cylinder head 5, an injection nozzle 6, an electric spark plug 7, a primary winding 8, a secondary winding 9, an ohmic resistor 10 and a magnetic flux guide body 11 are shown in dash-dot lines.
• the cylinder 3, the reciprocating piston 4 and the cylinder head 5 enclose a combustion chamber 12, the volume of which varies as a function of movements of the reciprocating piston 4.
• the injection nozzle 6 opens into this combustion chamber 12 and targets the reciprocating piston 4.
• the injection nozzle 6 can be supplied in a manner not shown from a device which provides fuel, for example gasoline fuel, with pressure.
• the electrical spark plug 7 can be selected, for example, from the prior art has electrodes 13 and 14 which protrude into the combustion chamber 12 and form an ignition spark gap 15 between them.
• the injection nozzle 6 could also be set up to inject diesel fuel to operate the internal combustion engine using the diesel method.
• At least one gas inlet valve of a known type and at least one gas outlet valve of a known type are not shown.
• the arrangement of a gas inlet valve and a gas outlet valve makes the internal combustion engine 2 a four-stroke internal combustion engine.
• the invention is not limited to use in a four-stroke internal combustion engine, but can also be used in combination with a two-stroke internal combustion engine.
• the design of an internal combustion engine as a two-stroke internal combustion engine is widely known, so that here too, for the sake of simplicity, a detailed description can be dispensed with.
• an alternating current source can consist of a direct current source and a downstream inverter.
• the secondary winding 9 is arranged in the reciprocating piston 4 in a vibration-proof manner.
• the ohm 'see resistor 10 is electrically conductively connected to the secondary winding 9 and in this way forms an electrical circuit together with the secondary winding 9.
• the primary winding 8 When the primary winding 8 is supplied with alternating current from the AC power source (not shown), it generates alternating magnetic fields which, when the secondary winding 9 is oriented sufficiently close to the primary winding 8 in the secondary winding 9, also generate alternating voltages and thus, thanks to the electrical circuit mentioned, alternating currents. So that as much as possible of the product that can be generated by means of the primary winding 8 from amps times the number of turns is converted into magnetic flux and of
• Secondary winding 9 can be converted into voltage and current strength, is installed at least in the area of the cylinder head 5 and thereby within the primary winding 8 of the magnetic flux guide body 11 in the form of a rod-like component.
• the length of this magnetic flux guide body 11 can be selected such that the magnetic flux guide body 11 protrudes from the cylinder head 5 into the combustion chamber 12 and, for example, dips into the secondary winding 9 with a free end 16, at least when the reciprocating piston 4 is in the end position on the cylinder head side or approaching it. This is clearly shown in Figure 1 because the rod-like
• Magnetic flux guide body 11 passes through the secondary winding 9 over its entire length and protrudes with its free end 16 from the secondary winding 9.
• the reciprocating piston 4 is shown in simplified form in the form of an external view with a reciprocating piston upper side 17, which in the exemplary embodiment is delimited over the surface, but in practice can also have a differently shaped delimitation.
• An insulating layer 18 is attached to the piston top 17.
• a plate-like radiator 19 is attached on the insulating layer 18.
• the heater 19 contains the ohm ' see resistor 10. It is the expert in electrical 02/42620
• the insulating layer 18 is designed as a thermal resistance between the heating element 19 and the piston top 17, such that a large part of the electrical energy supplied by the heating element 19 serves to heat the heating element 19, that is to say little of this electrical energy migrates into the lifting piston 4.
• FIG. 3 shows an external view of an alternative
• Reciprocating piston 4a on the upper piston side 17a of which an insulating layer 18a is in turn applied.
• a radiator 19a is embedded in the insulating layer 18a and is covered towards the cylinder head 5 by a cover 20 which emits heat.
• the cover 20 consists of a heat-conducting material, so that heat generated in the radiator 19a is predominantly absorbed by the cover 20 and therefore little of the heat generated by the radiator 19a leads to the heating of the reciprocating piston 4a through the insulating layer 18a.
• the power supply to the radiators 19 or 19a causes a temperature rise to a surface 21 or 21a assigned to the respective cylinder head 5, as a result of which the respective surface 21 or 21a assumes a temperature which is above the respective temperature of the reciprocating piston 4 or 4a and also of the respectively assigned cylinder 3.
• the temperatures of the surfaces 21 and 21a which are higher than the reciprocating pistons 4 and 4a and the cylinders 3, can be used for several things, namely on the one hand as a starting aid for an internal combustion engine with a conventional starter motor and on the other hand as a means of lowering carbon-hydrogen Proportions in the exhaust gas, as long as the internal combustion engine is not yet warm, and further as a fuel vaporization device for the purpose that the internal combustion engine can be started more reliably without a starter motor by means of a starting method, which is described in the publication DE 31 17 144 AI mentioned in the introduction to the description, for an multi-cylinder gasoline internal combustion engine.
• the use of the heatable surfaces 21 and 21a if they are used as a starting aid, result in the advantage in a starting method using a starter motor that the starter motor is less difficult to form.
• This of course has the advantage that the surfaces 21 and 21a, once electrically heated, subsequently serve to evaporate fuel, which improves combustion processes and thus leads to a reduction in the proportion of unburned fuel in the exhaust gas.
• FIG. 4 shows an alternative exemplary embodiment of an internal combustion engine 2a to the exemplary embodiment according to FIG. 1.
• a primary winding 8 is now arranged next to the movement path of the reciprocating piston 4 and thus in the height region of a cylinder 3a and is somehow attached to it.
• the primary winding 8 can have a magnetic flux guide body 11a and the secondary winding 9 can have its own magnetic flux guide body 11b.
• the invention can be transferred from the described Otto engine to a diesel engine.
• the primary winding 8 and the secondary winding 9 it is possible, for example, to have at least one electrically conductive contact strip and one sliding contact aligned thereon, for example on the reciprocating piston. provide.
• Another alternative would be to arrange a microwave transmitter on or in the cylinder head and to arrange a layer of microwave-sensitive material on the reciprocating piston for converting microwaves into thermal energy.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Combustion Methods Of Internal-Combustion Engines (AREA)
• Cylinder Crankcases Of Internal Combustion Engines (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=7664035

Family Applications (1)

Country Status (5)

Families Citing this family (10)

Family Cites Families (9)

• 2000
  • 2000-11-21 DE DE10057630A patent/DE10057630A1/de not_active Withdrawn
• 2001
  • 2001-11-20 WO PCT/DE2001/004299 patent/WO2002042620A1/de not_active Application Discontinuation
  • 2001-11-20 US US10/181,770 patent/US20040031464A1/en not_active Abandoned
  • 2001-11-20 EP EP01997629A patent/EP1339957A1/de not_active Withdrawn
  • 2001-11-20 JP JP2002544524A patent/JP2004514822A/ja active Pending

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events